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建筑桩基技术规范》JGJ94-2008

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建筑桩基技术规范》JGJ94-2008

发布日期:2019-05-06 作者: 点击:

1总则

1.0.1 WEILEZAIZHUANGJISHEJIYUSHIGONGZHONGGUANCHEZHIXINGGUOJIADEJISHUJINGJIZHENGCE,ZUODAOANQUANSHIYONG、JISHUXIANJIN、JINGJIHELI、QUEBAOZHILIANG,BAOHUHUANJING,ZHIDINGBENGUIFAN。

1.0.2 本规范适用于建筑(包括构筑物)桩基的设计、施工及验收。

1.0.3 桩基的设计与施工,应综合考虑工程地质与水文地质条件、上部结构类型、使用功能、荷载特征、施工技术条件与环境;应重视地方经验,因地制宜,注重概念设计,合理选择桩型、成桩工艺和承台形式,优化布桩,节约资源;应强化施工质量控制与管理。
▼ 展开条文说明

1.0.4 在进行桩基设计、施工及验收时,除应符合本规范外,尚应符合国家现行有关标准、规范的规定。


、施工环境、施工经验、制桩材料供应条件等,按安全适用、经济合理的原则选择。选择时可按本规范附录A进行。

亚博体育彩票    1 DUIYUKUANGJIA-HEXINTONGDENGHEZAIFENBUHENBUJUNYUNDEZHUANGFAJICHU,YIXUANZEJIZHUANGCHICUNHECHENGZAILIKEDIAOXINGJIAODADEZHUANGXINGHEGONGYI。

    2 JITUCHENGUANGUANZHUZHUANGYONGYUYUNIHEYUNIZHITUCENGSHI,YINGJUXIANYUDUOCENGZHUZHAIZHUANGJI。

    3 抗震设防烈度为8度及以上地区,不宜采用预应力混凝土管桩(PC)和预应力混凝土空心方桩(PS)。
▼ 展开条文说明

3.3.3 基桩的布置应符合下列条件:

    1 基桩的最小中心距应符合表3.3.3的规定;当施工中采取减小挤土效应的可靠措施时,可根据当地经验适当减小。 
   

   2 PAILIEJIZHUANGSHI,YISHIZHUANGQUNCHENGZAILIHELIDIANYUSHUXIANGYONGJIUHEZAIHELIZUOYONGDIANZHONGHE,BINGSHIJIZHUANGSHOUSHUIPINGLIHELIJUJIAODAFANGXIANGYOUJIAODAKANGWANJIEMIANMOLIANG。

亚博体育彩票    3 DUIYUZHUANGXIANGJICHU、JIANLIQIANGJIEGOUZHUANGFA(HANPINGBANHELIANGBANSHICHENGTAI)JICHU,YIJIANGZHUANGBUZHIYUQIANGXIA。

    4 DUIYUKUANGJIA-HEXINTONGJIEGOUZHUANGFAJICHUYINGANHEZAIFENBUKAOLVXIANGHUYINGXIANG,JIANGZHUANGXIANGDUIJIZHONGBUZHIYUHEXINTONGHEZHUXIA;WAIWEIKUANGJIAZHUYICAIYONGFUHEZHUANGJI,YOUHESHIZHUANGDUANCHILICENGSHI,ZHUANGZHANGYIJIANXIAO。

    5 YINGXUANZEJIAOYINGTUCENGZUOWEIZHUANGDUANCHILICENG。ZHUANGDUANQUANDUANMIANJINRUCHILICENGDESHENDU,DUIYUNIANXINGTU、FENTUBUYIXIAOYU2d,SHATUBUYIXIAOYU1.5d,SUISHILEITUBUYIXIAOYU1d。DANGCUNZAIRUANRUOXIAWOCENGSHI,ZHUANGDUANYIXIAYINGCHILICENGHOUDUBUYIXIAOYU3d。

    6 对于嵌岩桩,嵌岩深度应综合荷载、上覆土层、基岩、桩径、桩长诸因素确定;对于嵌入倾斜的完整和较完整岩的全断面深度不宜小于0.4d且不小于0.5m,倾斜度大于30%的中风化岩,宜根据倾斜度及岩石完整性适当加大嵌岩深度;对于嵌入平整、完整的坚硬岩和较硬岩的深度不宜小于0.2d,且不应小于0.2m。
▼ 展开条文说明


3.4 特殊条件下的桩基

亚博体育彩票3.4.1 RUANTUDIJIDEZHUANGJISHEJIYUANZEYINGFUHEXIALIEGUIDING:

    1 RUANTUZHONGDEZHUANGJIYIXUANZEZHONG、DIYASUOXINGTUCENGZUOWEIZHUANGDUANCHILICENG;

    2 ZHUANGZHOUWEIRUANTUYINZIZHONGGUJIE、CHANGDITIANTU、DIMIANDAMIANJIDUIZAI、JIANGDIDIXIASHUIWEI、DAMIANJIJITUCHENZHUANGDENGYUANYINERCHANSHENGDECHENJIANGDAYUJIZHUANGDECHENJIANGSHI,YINGSHIJUTIGONGCHENGQINGKUANGFENXIJISUANZHUANGCEFUMOZULIDUIJIZHUANGDEYINGXIANG;

    3 CAIYONGJITUZHUANGHEBUFENJITUZHUANGSHI,YINGCAIQUXIAOJIANKONGXISHUIYALIHEJITUXIAOYINGDEJISHUCUOSHI,BINGYINGKONGZHICHENZHUANGSULV,JIANXIAOJITUXIAOYINGDUICHENGZHUANGZHILIANG、LINJINJIANZHUWU、DAOLU、DIXIAGUANXIANHEJIKENGBIANPODENGCHANSHENGDEBULIYINGXIANG;

    4 先成桩后开挖基坑时,必须合理安排基坑挖土顺序和控制分层开挖的深度,防止土体侧移对桩的影响。
▼ 展开条文说明

3.4.2 湿陷性黄土地区的桩基设计原则应符合下列规定:

亚博体育彩票    1 JIZHUANGYINGCHUANTOUSHIXIANXINGHUANGTUCENG,ZHUANGDUANYINGZHICHENGZAIYASUOXINGDIDENIANXINGTU、FENTU、ZHONGMIHEMISHISHATUYIJISUISHILEITUCENGZHONG;

    2 SHIXIANXINGHUANGTUDIJIZHONG,SHEJIDENGJIWEIJIA、YIJIJIANZHUZHUANGJIDEDANZHUANGJIXIANCHENGZAILI,YIYIJINSHUIZAIHESHIYANWEIZHUYAOYIJU;

    3 自重湿陷性黄土地基中的单桩极限承载力,应根据工程具体情况分析计算桩侧负摩阻力的影响。
▼ 展开条文说明

3.4.3 季节性冻土和膨胀土地基中的桩基设计原则应符合下列规定:

    1 ZHUANGDUANJINRUDONGSHENXIANHUOPENGZHANGTUDEDAQIYINGXIANGJIJUCENGYIXIADESHENDU,YINGMANZUKANGBAWENDINGXINGYANSUANYAOQIU,QIEBUDEXIAOYU4BEIZHUANGJINGJI1BEIKUODADUANZHIJING,ZUIXIAOSHENDUYINGDAYU1.5m;

亚博体育彩票    2 WEIJIANXIAOHEXIAOCHUDONGZHANGHUOPENGZHANGDUIZHUANGJIDEZUOYONG,YICAIYONGZUAN(WA)KONGGUANZHUZHUANG;

亚博体育彩票    3 QUEDINGJIZHUANGSHUXIANGJIXIANCHENGZAILISHI,CHUBUJIRUDONGZHANG、PENGZHANGSHENDUFANWEINEIZHUANGCEZULIWAI,HAIYINGKAOLVDIJITUDEDONGZHANG、PENGZHANGZUOYONG,YANSUANZHUANGJIDEKANGBAWENDINGXINGHEZHUANGSHENSHOULACHENGZAILI;

    4 为消除桩基受冻胀或膨胀作用的危害,可在冻胀或膨胀深度范围内,沿桩周及承台作隔冻、隔胀处理。
▼ 展开条文说明

3.4.4 岩溶地区的桩基设计原则应符合下列规定:

亚博体育彩票    1 YANRONGDIQUDEZHUANGJI,YICAIYONGZUAN、CHONGKONGZHUANG;

    2 DANGDANZHUANGHEZAIJIAODA,YANCENGMAISHENJIAOQIANSHI,YICAIYONGQIANYANZHUANG;

    3 当基岩面起伏很大且埋深较大时,宜采用摩擦型灌注桩。
▼ 展开条文说明

3.4.5 坡地、岸边桩基的设计原则应符合下列规定:

    1 DUIJIANYUPODI、ANBIANDEZHUANGJI,BUDEJIANGZHUANGZHICHENGYUBIANPOQIANZAIDEHUADONGTISHANG。ZHUANGDUANJINRUQIANZAIHUALIEMIANYIXIAWENDINGYANTUCENGNEIDESHENDU,YINGNENGBAOZHENGZHUANGJIDEWENDING;

    2 JIANZHUZHUANGJIYUBIANPOYINGBAOCHIYIDINGDESHUIPINGJULI;JIANZHUCHANGDINEIDEBIANPOBIXUSHIWANQUANWENDINGDEBIANPO,DANGYOUBENGTA、HUAPODENGBULIANGDIZHIXIANXIANGCUNZAISHI,YINGANXIANXINGGUOJIABIAOZHUN《JIANZHUBIANPOGONGCHENGJISHUGUIFAN》GB 50330DEGUIDINGJINXINGZHENGZHI,QUEBAOQIWENDINGXING;

    3 XINJIANPODI、ANBIANJIANZHUZHUANGJIGONGCHENGYINGYUJIANZHUBIANPOGONGCHENGTONGYIGUIHUA,TONGBUSHEJI,HELIQUEDINGSHIGONGSHUNXU;

    4 BUYICAIYONGJITUZHUANG;

    5 应验算最不利荷载效应组合下桩基的整体稳定性和基桩水平承载力。
▼ 展开条文说明

3.4.6 抗震设防区桩基的设计原则应符合下列规定:

    1 ZHUANGJINRUYEHUATUCENGYIXIAWENDINGTUCENGDEZHANGDU(BUBAOKUOZHUANGJIANBUFEN)YINGANJISUANQUEDING;DUIYUSUISHITU,LI、CU、ZHONGSHA,MISHIFENTU,JIANYINGNIANXINGTUSHANGBUYINGXIAOYU(2~3)d,DUIQITAFEIYANSHITUSHANGBUYIXIAOYU(4~5)d;

    2 CHENGTAIHEDIXIASHICEQIANGZHOUWEIYINGCAIYONGHUITU、JIPEISHASHI、YASHIXINGJIAOHAODESUTUHUITIAN,BINGFENCENGHANGSHI,YEKECAIYONGSUHUNNINGTUHUITIANHUOJIAOBANLIUDONGXINGSHUINITUHUITIAN;

亚博体育彩票    3 DANGCHENGTAIZHOUWEIWEIKEYEHUATUHUODIJICHENGZAILITEZHENGZHIXIAOYU40kPa(HUOBUPAISHUIKANGJIANQIANGDUXIAOYU15kPa)DERUANTU,QIEZHUANGJISHUIPINGCHENGZAILIBUMANZUJISUANYAOQIUSHI,KEJIANGCHENGTAIWAIMEICE1/2CHENGTAIBIANZHANGFANWEINEIDETUJINXINGJIAGU;

    4 对于存在液化扩展的地段,应验算桩基在土流动的侧向作用力下的稳定性。
▼ 展开条文说明

3.4.7 可能出现负摩阻力的桩基设计原则应符合下列规定:

亚博体育彩票    1 DUIYUTIANTUJIANZHUCHANGDI,YIXIANTIANTUBINGBAOZHENGTIANTUDEMISHIXING,RUANTUCHANGDITIANTUQIANYINGCAIQUYUSHESULIAOPAISHUIBANDENGCUOSHI,DAITIANTUDIJICHENJIANGJIBENWENDINGHOUFANGKECHENGZHUANG;

    2 DUIYUYOUDIMIANDAMIANJIDUIZAIDEJIANZHUWU,YINGCAIQUJIANXIAODIMIANCHENJIANGDUIJIANZHUWUZHUANGJIYINGXIANGDECUOSHI;

亚博体育彩票    3 DUIYUZIZHONGSHIXIANXINGHUANGTUDIJI,KECAIYONGQIANGHANG、JIMITUZHUANGDENGXIANXINGCHULI,XIAOCHUSHANGBUHUOQUANBUTUDEZIZHONGSHIXIAN:DUIYUQIANGUJIETUYICAIQUXIANQIPAISHUIYUYADENGCUOSHI;

    4 DUIYUJITUCHENZHUANG,YINGCAIQUXIAOJIANCHAOKONGXISHUIYALI、KONGZHICHENZHUANGSULVDENGCUOSHI;

    5 对于中性点以上的桩身可对表面进行处理,以减少负摩阻力。
▼ 展开条文说明

3.4.8 抗拔桩基的设计原则应符合下列规定:

亚博体育彩票    1 YINGGENJUHUANJINGLEIBIEJISHUI、TUDUIGANGJINDEFUSHI、GANGJINZHONGLEIDUIFUSHIDEMINGANXINGHEHEZAIZUOYONGSHIJIANDENGYINSUQUEDINGKANGBAZHUANGDELIEFENGKONGZHIDENGJI;

亚博体育彩票    2 DUIYUYANGEYAOQIUBUCHUXIANLIEFENGDEYIJILIEFENGKONGZHIDENGJI,ZHUANGSHENYINGSHEZHIYUYINGLIJIN;DUIYUYIBANYAOQIUBUCHUXIANLIEFENGDEERJILIEFENGKONGZHIDENGJI,ZHUANGSHENYISHEZHIYUYINGLIJIN;

    3 DUIYUSANJILIEFENGKONGZHIDENGJI,YINGJINXINGZHUANGSHENLIEFENGKUANDUJISUAN;

    4 当基桩抗拔承载力要求较高时,可采用桩侧后注浆、扩底等技术措施。
▼ 展开条文说明


3.5 耐久性规定

3.5.1 ZHUANGJIJIEGOUDENAIJIUXINGYINGGENJUSHEJISHIYONGNIANXIAN、XIANXINGGUOJIABIAOZHUN《HUNNINGTUJIEGOUSHEJIGUIFAN》GB 50010DEHUANJINGLEIBIEGUIDINGYIJISHUI、TUDUIGANG、HUNNINGTUFUSHIXINGDEPINGJIAJINXINGSHEJI。

3.5.2 二类和三类环境中,设计使用年限为50年的桩基结构混凝土耐久性应符合表3.5.2的规定。

   
▼ 展开条文说明

3.5.3 桩身裂缝控制等级及最大裂缝宽度应根据环境类别和水土介质腐蚀性等级按表3.5.3规定选用。

   
▼ 展开条文说明

3.5.4 四类、五类环境桩基结构耐久性设计可按国家现行标准《港口工程混凝土结构设计规范》JTJ 267和《工业建筑防腐蚀设计规范》GB 50046等执行。

3.5.5 对三、四、五类环境桩基结构,受力钢筋宜采用环氧树脂涂层带肋钢筋。


4桩基构造

4.1 桩基构造

ⅠGUANZHUZHUANG

4.1.1 灌注桩应按下列规定配筋:

    1 PEIJINLV:DANGZHUANGSHENZHIJINGWEI300~2000mmSHI,ZHENGJIEMIANPEIJINLVKEQU0.65%~0.2%(XIAOZHIJINGZHUANGQUGAOZHI);DUISHOUHEZAITEBIEDADEZHUANG、KANGBAZHUANGHEQIANYANDUANCHENGZHUANGYINGGENJUJISUANQUEDINGPEIJINLV,BINGBUYINGXIAOYUSHANGSHUGUIDINGZHI;

    2 PEIJINZHANGDU:

亚博体育彩票        1) DUANCHENGXINGZHUANGHEWEIYUPODI、ANBIANDEJIZHUANGYINGYANZHUANGSHENDENGJIEMIANHUOBIANJIEMIANTONGZHANGPEIJIN;

        2) MOCAXINGGUANZHUZHUANGPEIJINZHANGDUBUYINGXIAOYU2/3ZHUANGZHANG;DANGSHOUSHUIPINGHEZAISHI,PEIJINZHANGDUSHANGBUYIXIAOYU4.0/α(αWEIZHUANGDESHUIPINGBIANXINGXISHU);

亚博体育彩票        3) DUIYUSHOUDIZHENZUOYONGDEJIZHUANG,ZHUANGSHENPEIJINZHANGDUYINGCHUANGUOKEYEHUATUCENGHERUANRUOTUCENG,JINRUWENDINGTUCENGDESHENDUBUYINGXIAOYUBENGUIFANDI3.4.6TIAODEGUIDING;

亚博体育彩票        4) SHOUFUMOZULIDEZHUANG、YINXIANCHENGZHUANGHOUKAIWAJIKENGERSUIDIJITUHUIDANDEZHUANG,QIPEIJINZHANGDUYINGCHUANGUORUANRUOTUCENGBINGJINRUWENDINGTUCENG,JINRUDESHENDUBUYINGXIAOYU(2~3)d;

亚博体育彩票        5) KANGBAZHUANGJIYINDIZHENZUOYONG、DONGZHANGHUOPENGZHANGLIZUOYONGERSHOUBALIDEZHUANG,YINGDENGJIEMIANHUOBIANJIEMIANTONGZHANGPEIJIN。

亚博体育彩票    3 DUIYUSHOUSHUIPINGHEZAIDEZHUANG,ZHUJINBUYINGXIAOYU8ф12;DUIYUKANGYAZHUANGHEKANGBAZHUANG,ZHUJINBUYINGSHAOYU6ф10;ZONGXIANGZHUJINYINGYANZHUANGSHENZHOUBIANJUNYUNBUZHI,QIJINGJUBUYINGXIAOYU60mm;

    4 箍筋应采用螺旋式,直径不应小于6mm,间距宜为200~300mm;受水平荷载较大的桩基、承受水平地震作用的桩基以及考虑主筋作用计算桩身受压承载力时,桩顶以下5d范围内的箍筋应加密,间距不应大于100mm;当桩身位于液化土层范围内时箍筋应加密;当考虑箍筋受力作用时,箍筋配置应符合现行国家标准《混凝土结构设计规范》GB 50010的有关规定;当钢筋笼长度超过4m时,应每隔2m设一道直径不小于12mm的焊接加劲箍筋。
▼ 展开条文说明

4.1.2 桩身混凝土及混凝土保护层厚度应符合下列要求:

    1 ZHUANGSHENHUNNINGTUQIANGDUDENGJIBUDEXIAOYUC25,HUNNINGTUYUZHIZHUANGJIANQIANGDUDENGJIBUDEXIAOYUC30;

    2 GUANZHUZHUANGZHUJINDEHUNNINGTUBAOHUCENGHOUDUBUYINGXIAOYU35mm,SHUIXIAGUANZHUZHUANGDEZHUJINHUNNINGTUBAOHUCENGHOUDUBUDEXIAOYU50mm;

    3 四类、五类环境中桩身混凝土保护层厚度应符合国家现行标准《港口工程混凝土结构设计规范》JTJ 267、《工业建筑防腐蚀设计规范》GB 50046的相关规定。
▼ 展开条文说明

4.1.3 扩底灌注桩扩底端尺寸应符合下列规定(见图4.1.3):

亚博体育彩票    1 DUIYUCHILICENGCHENGZAILIJIAOGAO、SHANGFUTUCENGJIAOCHADEKANGYAZHUANGHEZHUANGDUANYISHANGYOUYIDINGHOUDUJIAOHAOTUCENGDEKANGBAZHUANG,KECAIYONGKUODI;KUODIDUANZHIJINGYUZHUANGSHENZHIJINGZHIBID/d,YINGGENJUCHENGZAILIYAOQIUJIKUODIDUANCEMIANHEZHUANGDUANCHILICENGTUXINGTEZHENGYIJIKUODISHIGONGFANGFAQUEDING,WAKONGZHUANGDED/dBUYINGDAYU3,ZUANKONGZHUANGDED/dBUYINGDAYU2.5;

    2 KUODIDUANCEMIANDEXIELVYINGGENJUSHIJICHENGKONGJITUTIZILITIAOJIANQUEDING,a/hcKEQU1/4~1/2,SHATUKEQU1/4,FENTU、NIANXINGTUKEQU1/3~1/2;

    3 KANGYAZHUANGKUODIDUANDIMIANYICHENGGUODIXING,SHIGAOhbKEQU(0.15~0.20)D。

ⅡHUNNINGTUYUZHIZHUANG

4.1.4 HUNNINGTUYUZHIZHUANGDEJIEMIANBIANZHANGBUYINGXIAOYU200mm;YUYINGLIHUNNINGTUYUZHISHIXINZHUANGDEJIEMIANBIANZHANGBUYIXIAOYU350mm。

4.1.5 预制桩的混凝土强度等级不宜低于C30;预应力混凝土实心桩的混凝土强度等级不应低于C40;预制桩纵向钢筋的混凝土保护层厚度不宜小于30mm。

4.1.6 预制桩的桩身配筋应按吊运、打桩及桩在使用中的受力等条件计算确定。采用锤击法沉桩时,预制桩的最小配筋率不宜小于0.8%。静压法沉桩时,最小配筋率不宜小于0.6%,主筋直径不宜小于14mm,打入桩桩顶以下(4~5)d长度范围内箍筋应加密,并设置钢筋网片。

4.1.7 预制桩的分节长度应根据施工条件及运输条件确定;每根桩的接头数量不宜超过3个。

4.1.8 预制桩的桩尖可将主筋合拢焊在桩尖辅助钢筋上,对于持力层为密实砂和碎石类土时,宜在桩尖处包以钢钣桩靴,加强桩尖。

ⅢYUYINGLIHUNNINGTUKONGXINZHUANG

4.1.9 YUYINGLIHUNNINGTUKONGXINZHUANGANJIEMIANXINGSHIKEFENWEIGUANZHUANG、KONGXINFANGZHUANG;ANHUNNINGTUQIANGDUDENGJIKEFENWEIYUYINGLIGAOQIANGHUNNINGTUGUANZHUANG(PHC)HEKONGXINFANGZHUANG(PHS)、YUYINGLIHUNNINGTUGUANZHUANG(PC)HEKONGXINFANGZHUANG(PS)。

    LIXINCHENGXINGDEXIANZHANGFAYUYINGLIHUNNINGTUZHUANGDEJIEMIANCHICUN、PEIJIN、ZHUANGSHENJIXIANWANJU、ZHUANGSHENSHUXIANGSHOUYACHENGZAILISHEJIZHIDENGCANSHUKEANBENGUIFANFULUBQUEDING。

4.1.10 预应力混凝土空心桩桩尖形式宜根据地层性质选择闭口形或敞口形;闭口形分为平底十字形和锥形。

4.1.11 预应力混凝土空心桩质量要求,尚应符合国家现行标准《先张法预应力混凝土管桩》GB 13476和《预应力混凝土空心方桩》JG 197及其他的有关标准规定。

4.1.12 预应力混凝土桩的连接可采用端板焊接连接、法兰连接、机械啮合连接、螺纹连接。每根桩的接头数量不宜超过3个。

4.1.13 桩端嵌入遇水易软化的强风化岩、全风化岩和非饱和土的预应力混凝土空心桩,沉桩后,应对桩端以上约2m范围内采取有效的防渗措施,可采用微膨胀混凝土填芯或在内壁预涂柔性防水材料。
▼ 展开条文说明

ⅣGANGZHUANG

4.1.14 GANGZHUANGKECAIYONGGUANXING、HXINGHUOQITAYIXINGGANGCAI。

4.1.15 钢桩的分段长度宜为12~15m。

4.1.16 钢桩焊接接头应采用等强度连接。

4.1.17 钢桩的端部形式,应根据桩所穿越的土层、桩端持力层性质、桩的尺寸、挤土效应等因素综合考虑确定,并可按下列规定采用:

亚博体育彩票    1 GANGGUANZHUANGKECAIYONGXIALIEZHUANGDUANXINGSHI:

        1) CHANGKOU:

        DAIJIAQIANGGU(DAINEIGEBAN、BUDAINEIGEBAN);BUDAIJIAQIANGGU(DAINEIGEBAN、BUDAINEIGEBAN)。

        2) BIKOU:

亚博体育彩票        PINGDI;ZHUIDI。

    2 HXINGGANGZHUANGKECAIYONGXIALIEZHUANGDUANXINGSHI: 

        1) DAIDUANBAN;

        2) BUDAIDUANBAN:

亚博体育彩票        ZHUIDI;

亚博体育彩票        PINGDI(DAIKUODAYI、BUDAIKUODAYI)。

4.1.18 钢桩的防腐处理应符合下列规定:

    1 GANGZHUANGDEFUSHISULVDANGWUSHICEZILIAOSHIKEANBIAO4.1.18QUEDING;

    2 GANGZHUANGFANGFUCHULIKECAIYONGWAIBIAOMIANTUFANGFUCENG、ZENGJIAFUSHIYULIANGJIYINJIBAOHU;DANGGANGGUANZHUANGNEIBITONGWAIJIEGEJUESHI,KEBUKAOLVNEIBIFANGFU。


4.2 承台构造

亚博体育彩票4.2.1 ZHUANGJICHENGTAIDEGOUZAO,CHUYINGMANZUKANGCHONGQIE、KANGJIANQIE、KANGWANCHENGZAILIHESHANGBUJIEGOUYAOQIUWAI,SHANGYINGFUHEXIALIEYAOQIU:

    1 ZHUXIADULIZHUANGJICHENGTAIDEZUIXIAOKUANDUBUYINGXIAOYU500mm,BIANZHUANGZHONGXINZHICHENGTAIBIANYUANDEJULIBUYINGXIAOYUZHUANGDEZHIJINGHUOBIANZHANG,QIEZHUANGDEWAIBIANYUANZHICHENGTAIBIANYUANDEJULIBUYINGXIAOYU150mm。DUIYUQIANGXIATIAOXINGCHENGTAILIANG,ZHUANGDEWAIBIANYUANZHICHENGTAILIANGBIANYUANDEJULIBUYINGXIAOYU75mm。CHENGTAIDEZUIXIAOHOUDUBUYINGXIAOYU300mm。

    2 GAOCENGJIANZHUPINGBANSHIHELIANGBANSHIFAXINGCHENGTAIDEZUIXIAOHOUDUBUYINGXIAOYU400mm,DUOCENGJIANZHUQIANGXIABUZHUANGDEJIANLIQIANGJIEGOUFAXINGCHENGTAIDEZUIXIAOHOUDUBUYINGXIAOYU200mm。 

    3 高层建筑箱形承台的构造应符合《高层建筑筏形与箱形基础技术规范》JGJ 6的规定。
▼ 展开条文说明

4.2.2 承台混凝土材料及其强度等级应符合结构混凝土耐久性的要求和抗渗要求。
▼ 展开条文说明

4.2.3 承台的钢筋配置应符合下列规定:

    1 ZHUXIADULIZHUANGJICHENGTAIGANGJINYINGTONGZHANGPEIZHI[JIANTU4.2.3(a)],DUISIZHUANGYISHANG(HANSIZHUANG)CHENGTAIYIANSHUANGXIANGJUNYUNBUZHI,DUISANZHUANGDESANJIAOXINGCHENGTAIYINGANSANXIANGBANDAIJUNYUNBUZHI,QIEZUILIMIANDESANGENGANGJINWEICHENGDESANJIAOXINGYINGZAIZHUJIEMIANFANWEINEI[JIANTU4.2.3(b)]。GANGJINMAOGUZHANGDUZIBIANZHUANGNEICE(DANGWEIYUANZHUANGSHI,YINGJIANGQIZHIJINGCHENGYI0.8DENGXIAOWEIFANGZHUANG)SUANQI,BUYINGXIAOYU35dg(dgWEIGANGJINZHIJING);DANGBUMANZUSHIYINGJIANGGANGJINXIANGSHANGWANZHE,CISHISHUIPINGDUANDEZHANGDUBUYINGXIAOYU25dg,WANZHEDUANZHANGDUBUYINGXIAOYU10dg。CHENGTAIZONGXIANGSHOULIGANGJINDEZHIJINGBUYINGXIAOYU12mm,JIANJUBUYINGDAYU200mm。ZHUXIADULIZHUANGJICHENGTAIDEZUIXIAOPEIJINLVBUYINGXIAOYU0.15%。

    2 柱下独立两桩承台,应按现行国家标准《混凝土结构设计规范》GB 50010中的深受弯构件配置纵向受拉钢筋、水平及竖向分布钢筋。承台纵向受力钢筋端部的锚固长度及构造应与柱下多桩承台的规定相同。    
   

亚博体育彩票    3 TIAOXINGCHENGTAILIANGDEZONGXIANGZHUJINYINGFUHEXIANXINGGUOJIABIAOZHUN《HUNNINGTUJIEGOUSHEJIGUIFAN》GB 50010GUANYUZUIXIAOPEIJINLVDEGUIDING,ZHUJINZHIJINGBUYINGXIAOYU12mm,JIALIJINZHIJINGBUYINGXIAOYU10mm,GUJINZHIJINGBUYINGXIAOYU6mm(TU4.2.3-C)。

亚博体育彩票    4 FAXINGCHENGTAIBANHUOXIANGXINGCHENGTAIBANZAIJISUANZHONGDANGJINKAOLVJUBUWANJUZUOYONGSHI,KAOLVDAOZHENGTIWANQUDEYINGXIANG,ZAIZONGHENGLIANGGEFANGXIANGDEXIACENGGANGJINPEIJINLVBUYIXIAOYU0.15%;SHANGCENGGANGJINYINGANJISUANPEIJINLVQUANBULIANTONG。DANGFABANDEHOUDUDAYU2000mmSHI,YIZAIBANHOUZHONGJIANBUWEISHEZHIZHIJINGBUXIAOYU12mm、JIANJUBUDAYU300mmDESHUANGXIANGGANGJINWANG。

    5 承台底面钢筋的混凝土保护层厚度,当有混凝土垫层时,不应小于50mm,无垫层时不应小于70mm;此外尚不应小于桩头嵌入承台内的长度。
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4.2.4 桩与承台的连接构造应符合下列规定:

亚博体育彩票    1 ZHUANGQIANRUCHENGTAINEIDEZHANGDUDUIZHONGDENGZHIJINGZHUANGBUYIXIAOYU50mm;DUIDAZHIJINGZHUANGBUYIXIAOYU100mm。

亚博体育彩票    2 HUNNINGTUZHUANGDEZHUANGDINGZONGXIANGZHUJINYINGMAORUCHENGTAINEI,QIMAORUZHANGDUBUYIXIAOYU35BEIZONGXIANGZHUJINZHIJING。DUIYUKANGBAZHUANG,ZHUANGDINGZONGXIANGZHUJINDEMAOGUZHANGDUYINGANXIANXINGGUOJIABIAOZHUN《HUNNINGTUJIEGOUSHEJIGUIFAN》GB 50010QUEDING。

    3 对于大直径灌注桩,当采用一柱一桩时可设置承台或将桩与柱直接连接。
▼ 展开条文说明

4.2.5 柱与承台的连接构造应符合下列规定:

    1 DUIYUYIZHUYIZHUANGJICHU,ZHUYUZHUANGZHIJIELIANJIESHI,ZHUZONGXIANGZHUJINMAORUZHUANGSHENNEIZHANGDUBUYINGXIAOYU35BEIZONGXIANGZHUJINZHIJING。

    2 DUIYUDUOZHUANGCHENGTAI,ZHUZONGXIANGZHUJINYINGMAORUCHENGTAIBUXIAOYU35BEIZONGXIANGZHUJINZHIJING;DANGCHENGTAIGAODUBUMANZUMAOGUYAOQIUSHI,SHUXIANGMAOGUZHANGDUBUYINGXIAOYU20BEIZONGXIANGZHUJINZHIJING,BINGXIANGZHUZHOUXIANFANGXIANGCHENG90°WANZHE。

    3 DANGYOUKANGZHENSHEFANGYAOQIUSHI,DUIYUYI、ERJIKANGZHENDENGJIDEZHU,ZONGXIANGZHUJINMAOGUZHANGDUYINGCHENGYI1.15DEXISHU;DUIYUSANJIKANGZHENDENGJIDEZHU,ZONGXIANGZHUJINMAOGUZHANGDUYINGCHENGYI1.05DEXISHU。

4.2.6 承台与承台之间的连接构造应符合下列规定:

    1 YIZHUYIZHUANGSHI,YINGZAIZHUANGDINGLIANGGEZHUZHOUFANGXIANGSHANGSHEZHILIANXILIANG。DANGZHUANGYUZHUDEJIEMIANZHIJINGZHIBIDAYU2SHI,KEBUSHELIANXILIANG。

亚博体育彩票    2 LIANGZHUANGZHUANGJIDECHENGTAI,YINGZAIQIDUANXIANGSHEZHILIANXILIANG。

亚博体育彩票    3 YOUKANGZHENSHEFANGYAOQIUDEZHUXIAZHUANGJICHENGTAI,YIYANLIANGGEZHUZHOUFANGXIANGSHEZHILIANXILIANG。

亚博体育彩票    4 LIANXILIANGDINGMIANYIYUCHENGTAIDINGMIANWEIYUTONGYIBIAOGAO。LIANXILIANGKUANDUBUYIXIAOYU250mm,QIGAODUKEQUCHENGTAIZHONGXINJUDE1/10~1/15,QIEBUYIXIAOYU400mm。

    5 连系梁配筋应按计算确定,梁上下部配筋不宜小于2根直径12mm钢筋;位于同一轴线上的相邻跨连系梁纵筋应连通。
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4.2.7 承台和地下室外墙与基坑侧壁间隙应灌注素混凝土或搅拌流动性水泥土,或采用灰土、级配砂石、压实性较好的素土分层夯实,其压实系数不宜小于0.94。
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5桩基计算

5.1 桩顶作用效应计算

5.1.1 DUIYUYIBANJIANZHUWUHESHOUSHUIPINGLI(BAOKUOLIJUYUSHUIPINGJIANLI)JIAOXIAODEGAOCENGJIANZHUQUNZHUANGJICHU,YINGANXIALIEGONGSHIJISUANZHU、QIANG、HEXINTONGQUNZHUANGZHONGJIZHUANGHUOFUHEJIZHUANGDEZHUANGDINGZUOYONGXIAOYING:

    1 SHUXIANGLI

    ZHOUXINSHUXIANGLIZUOYONGXIA

 

 


▼ 展开条文说明

5.1.2 对于主要承受竖向荷载的抗震设防区低承台桩基,在同时满足下列条件时,桩顶作用效应计算可不考虑地震作用;

    1 ANXIANXINGGUOJIABIAOZHUN《JIANZHUKANGZHENSHEJIGUIFAN》GB 50011GUIDINGKEBUJINXINGZHUANGJIKANGZHENCHENGZAILIYANSUANDEJIANZHUWU;

    2 JIANZHUCHANGDIWEIYUJIANZHUKANGZHENDEYOULIDIDUAN。

5.1.3 属于下列情况之一的桩基,计算各基桩的作用效应、桩身内力和位移时,宜考虑承台(包括地下墙体)与基桩协同工作和土的弹性抗力作用,其计算方法可按本规范附录C进行:

    1 WEIYU8DUHE8DUYISHANGKANGZHENSHEFANGQUDEJIANZHU,DANGQIZHUANGJICHENGTAIGANGDUJIAODAHUOYOUYUSHANGBUJIEGOUYUCHENGTAIXIETONGZUOYONGNENGZENGQIANGCHENGTAIDEGANGDUSHI;

    2 其他受较大水平力的桩基。
▼ 展开条文说明


5.2 桩基竖向承载力计算


▼ 展开条文说明

5.2.3 DUIYUDUANCHENGXINGZHUANGJI、ZHUANGSHUSHAOYU4GENDEMOCAXINGZHUXIADULIZHUANGJI、HUOYOUYUDICENGTUXING、SHIYONGTIAOJIANDENGYINSUBUYIKAOLVCHENGTAIXIAOYINGSHI,JIZHUANGSHUXIANGCHENGZAILITEZHENGZHIYINGQUDANZHUANGSHUXIANGCHENGZAILITEZHENGZHI。

5.2.4 对于符合下列条件之一的摩擦型桩基,宜考虑承台效应确定其复合基桩的竖向承载力特征值:

亚博体育彩票    1 SHANGBUJIEGOUZHENGTIGANGDUJIAOHAO、TIXINGJIANDANDEJIAN(GOU)ZHUWU;

    2 DUICHAYICHENJIANGSHIYINGXINGJIAOQIANGDEPAIJIAJIEGOUHEROUXINGGOUZHUWU;

亚博体育彩票    3 ANBIANGANGDUDIAOPINGYUANZESHEJIDEZHUANGJIGANGDUXIANGDUIRUOHUAQU;

    4 软土地基的减沉复合疏桩基础。
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5.2.5 考虑承台效应的复合基桩竖向承载力特征值可按下列公式确定: 

当承台底为可液化土、湿陷性土、高灵敏度软土、欠固结土、新填土时,沉桩引起超孔隙水压力和土体隆起时,不考虑承台效应,取ηc=0。


▼ 展开条文说明

5.3 单桩竖向极限承载力

Ⅰ一般规定

5.3.1 设计采用的单桩竖向极限承载力标准值应符合下列规定;

亚博体育彩票    1 SHEJIDENGJIWEIJIAJIDEJIANZHUZHUANGJI,YINGTONGGUODANZHUANGJINGZAISHIYANQUEDING;

亚博体育彩票    2 SHEJIDENGJIWEIYIJIDEJIANZHUZHUANGJI,DANGDIZHITIAOJIANJIANDANSHI,KECANZHAODIZHITIAOJIANXIANGTONGDESHIZHUANGZILIAO,JIEHEJINGLICHUTANDENGYUANWEICESHIHEJINGYANCANSHUZONGHEQUEDING;QIYUJUNYINGTONGGUODANZHUANGJINGZAISHIYANQUEDING;

    3 设计等级为丙级的建筑桩基,可根据原位测试和经验参数确定。
▼ 展开条文说明

5.3.2 单桩竖向极限承载力标准值、极限侧阻力标准值和极限端阻力标准值应按下列规定确定;

    1 DANZHUANGSHUXIANGJINGZAISHIYANYINGANXIANXINGXINGYEBIAOZHUN《JIANZHUJIZHUANGJIANCEJISHUGUIFAN》JGJ 106ZHIXING;

    2 DUIYUDAZHIJINGDUANCHENGXINGZHUANG,YEKETONGGUOSHENCENGPINGBAN(PINGBANZHIJINGYINGYUKONGJINGYIZHI)ZAIHESHIYANQUEDINGJIXIANDUANZULI;

    3 DUIYUQIANYANZHUANG,KETONGGUOZHIJINGWEI0.3mYANJIPINGBANZAIHESHIYANQUEDINGJIXIANDUANZULIBIAOZHUNZHI,YEKETONGGUOZHIJINGWEI0.3mQIANYANDUANDUNZAIHESHIYANQUEDINGJIXIANCEZULIBIAOZHUNZHIHEJIXIANDUANZULIBIAOZHUNZHI;

    4 桩的极限侧阻力标准值和极限端阻力标准值宜通过埋设桩身轴力测试元件由静载试验确定。并通过测试结果建立极限侧阻力标准值和极限端阻力标准值与土层物理指标、岩石饱和单轴抗压强度以及与静力触探等土的原位测试指标间的经验关系,以经验参数法确定单桩竖向极限承载力。
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Ⅱ原位测试法

5.3.3 当根据单桥探头静力触探资料确定混凝土预制桩单桩竖向极限承载力标准值时,如无当地经验,可按下式计算:

                                

ⅤHUNNINGTUKONGXINZHUANG

5.3.8 当根据土的物理指标与承载力参数之间的经验关系确定敞口预应力混凝土空心桩单桩竖向极限承载力标准值时,可按下列公式计算:

        
▼ 展开条文说明

5.3.11 后注浆钢导管注浆后可等效替代纵向主筋。
▼ 展开条文说明

ⅧYEHUAXIAOYING

5.3.12 对于桩身周围有液化土层的低承台桩基,在承台底面上下分别有厚度不小于1.5m、1.0m的非液化土或非软弱土层时,可将液化土层极限侧阻力乘以土层液化影响折减系数计算单桩极限承载力标准值。土层液化影响折减系数ψl可按表5.3.12确定。

当承台底面上下非液化土层厚度小于以上规定时,土层液化影响折减系数ψl取0。


5.4 特殊条件下桩基竖向承载力验算


 


Ⅰ软弱下卧层验算

亚博体育彩票5.4.1 DUIYUZHUANGJUBUCHAOGUO6dDEQUNZHUANGJICHU,ZHUANGDUANCHILICENGXIACUNZAICHENGZAILIDIYUZHUANGDUANCHILICENGCHENGZAILI1/3DERUANRUOXIAWOCENGSHI,KEANXIALIEGONGSHIYANSUANRUANRUOXIAWOCENGDECHENGZAILI(JIANTU5.4.1):

    
▼ 展开条文说明

ⅡFUMOCALIJISUAN

5.4.2 符合下列条件之一的桩基,当桩周土层产生的沉降超过基桩的沉降时,在计算基桩承载力时应计入桩侧负摩阻力:

亚博体育彩票    1 ZHUANGCHUANYUEJIAOHOUSONGSANTIANTU、ZIZHONGSHIXIANXINGHUANGTU、QIANGUJIETU、YEHUATUCENGJINRUXIANGDUIJIAOYINGTUCENGSHI;

亚博体育彩票    2 ZHUANGZHOUCUNZAIRUANRUOTUCENG,LINJINZHUANGCEDIMIANCHENGSHOUJUBUJIAODADEZHANGQIHEZAI,HUODIMIANDAMIANJIDUIZAI(BAOKUOTIANTU)SHI;

    3 由于降低地下水位,使桩周土有效应力增大,并产生显著压缩沉降时。

5.4.3 桩周土沉降可能引起桩侧负摩阻力时,应根据工程具体情况考虑负摩阻力对桩基承载力和沉降的影响;当缺乏可参照的工程经验时,可按下列规定验算。

    1 DUIYUMOCAXINGJIZHUANGKEQUZHUANGSHENJISUANZHONGXINGDIANYISHANGCEZULIWEILING,BINGKEANXIASHIYANSUANJIZHUANGCHENGZAILI:


▼ 展开条文说明
                   

5.4.8 PENGZHANGTUSHANGQINGXINGJIANZHUDEDUANZHUANGJICHU,YINGANXIALIEGONGSHIYANSUANQUNZHUANGJICHUCHENGZHENGTIPOHUAIHEFEIZHENGTIPOHUAIDEKANGBAWENDINGXING:

5.5 桩基沉降计算

5.5.1 建筑桩基沉降变形计算值不应大于桩基沉降变形允许值。

5.5.2 桩基沉降变形可用下列指标表示:

亚博体育彩票    1 CHENJIANGLIANG;

    2 CHENJIANGCHA;

    3 ZHENGTIQINGXIE:JIANZHUWUZHUANGJICHUQINGXIEFANGXIANGLIANGDUANDIANDECHENJIANGCHAYUQIJULIZHIBIZHI;

    4 JUBUQINGXIE:QIANGXIATIAOXINGCHENGTAIYANZONGXIANGMOUYIZHANGDUFANWEINEIZHUANGJICHULIANGDIANDECHENJIANGCHAYUQIJULIZHIBIZHI。

5.5.3 计算桩基沉降变形时,桩基变形指标应按下列规定选用:

亚博体育彩票    1 YOUYUTUCENGHOUDUYUXINGZHIBUJUNYUN、HEZAICHAYI、TIXINGFUZA、XIANGHUYINGXIANGDENGYINSUYINQIDEDIJICHENJIANGBIANXING,DUIYUQITICHENGZHONGJIEGOUYINGYOUJUBUQINGXIEKONGZHI;

亚博体育彩票    2 DUIYUDUOCENGHUOGAOCENGJIANZHUHEGAOSONGJIEGOUYINGYOUZHENGTIQINGXIEZHIKONGZHI;

    3 DANGQIJIEGOUWEIKUANGJIA、KUANGJIA-JIANLIQIANG、KUANGJIA-HEXINTONGJIEGOUSHI,SHANGYINGKONGZHIZHU(QIANG)ZHIJIANDECHAYICHENJIANG。

5.5.5 对于本规范表5.5.4中未包括的建筑桩基沉降变形允许值,应根据上部结构对桩基沉降变形的适应能力和使用要求确定。

Ⅰ桩中心距不大于6倍桩径的桩基

5.5.6 对于桩中心距不大于6倍桩径的桩基,其最终沉降量计算可采用等效作用分层总和法。等效作用面位于桩端平面,等效作用面积为桩承台投影面积,等效作用附加压力近似取承台底平均附加压力。等效作用面以下的应力分布采用各向同性均质直线变形体理论。计算模式如图5.5.6所示,桩基任一点最终沉降量


▼ 展开条文说明
       
▼ 展开条文说明

5.5.12 计算桩基沉降时,应考虑相邻基础的影响,采用叠加原理计算;桩基等效沉降系数可按独立基础计算。

5.5.13 当桩基形状不规则时,可采用等效矩形面积计算桩基等效沉降系数,等效矩形的长宽比可根据承台实际尺寸和形状确定。

Ⅱ单桩、单排桩、疏桩基础

5.5.14 对于单桩、单排桩、桩中心距大于6倍桩径的疏桩基础的沉降计算应符合下列规定:

    1 CHENGTAIDIDIJITUBUFENDANHEZAIDEZHUANGJI。ZHUANGDUANPINGMIANYIXIADIJIZHONGYOUJIZHUANGYINQIDEFUJIAYINGLI,ANKAOLVZHUANGJINGYINGXIANGDEMINGDELIN(Mindlin)JIEFULUFJISUANQUEDING。JIANGCHENJIANGJISUANDIANSHUIPINGMIANYINGXIANGFANWEINEIGEJIZHUANGDUIYINGLIJISUANDIANCHANSHENGDEFUJIAYINGLIDIEJIA,CAIYONGDANXIANGYASUOFENCENGZONGHEFAJISUANTUCENGDECHENJIANG,BINGJIRUZHUANGSHENYASUOse。ZHUANGJIDEZUIZHONGCHENJIANGLIANGKEANXIALIEGONGSHIJISUAN:

 

 

 


▼ 展开条文说明


5.6 软土地基减沉复合疏桩基础



5.6.1 当软土地基上多层建筑,地基承载力基本满足要求(以底层平面面积计算)时,可设置穿过软土层进入相对较好土层的疏布摩擦型桩,由桩和桩间土共同分担荷载。该种减沉符合疏桩基础,可按下列公式确定承台面积和桩数:


▼ 展开条文说明

5.6.2 减沉复合疏桩基础中点沉降可按下列公式计算:

 


▼ 展开条文说明


5.7 桩基水平承载力与位移计算


Ⅰ单桩基础

5.7.1 受水平荷载的一般建筑物和水平荷载较小的高大建筑物单桩基础和群桩中基桩应满足下式要求:

5.7.2 单桩的水平承载力特征值的确定应符合下列规定:
▼ 展开条文说明

    1 DUIYUSHOUSHUIPINGHEZAIJIAODADESHEJIDENGJIWEIJIAJI、YIJIDEJIANZHUZHUANGJI,DANZHUANGSHUIPINGCHENGZAILITEZHENGZHIYINGTONGGUODANZHUANGSHUIPINGJINGZAISHIYANQUEDING,SHIYANFANGFAKEANXIANXINGXINGYEBIAOZHUN《JIANZHUJIZHUANGJIANCEJISHUGUIFAN》JGJ 106ZHIXING。

亚博体育彩票    2 DUIYUGANGJINHUNNINGTUYUZHIZHUANG、GANGZHUANG、ZHUANGSHENPEIJINLVBUXIAOYU0.65%DEGUANZHUZHUANG,KEGENJUJINGZAISHIYANJIEGUOQUDIMIANCHUSHUIPINGWEIYIWEI10mm(DUIYUSHUIPINGWEIYIMINGANDEJIANZHUWUQUSHUIPINGWEIYI6mm)SUODUIYINGDEHEZAIDE75%WEIDANZHUANGSHUIPINGCHENGZAILITEZHENGZHI。

    3 DUIYUZHUANGSHENPEIJINLVXIAOYU0.65%DEGUANZHUZHUANG,KEQUDANZHUANGSHUIPINGJINGZAISHIYANDELINJIEHEZAIDE75%WEIDANZHUANGSHUIPINGCHENGZAILITEZHENGZHI。

    4 DANGQUESHAODANZHUANGSHUIPINGJINGZAISHIYANZILIAOSHI,KEANXIALIEGONGSHIGUSUANZHUANGSHENPEIJINLVXIAOYU0.65%DEGUANZHUZHUDEDANZHUANGSHUIPINGCHENGZAILIDETEZHENGZHI:

 

 

 

 

亚博体育彩票5.7.4 JISUANSHUIPINGHEZAIJIAODAHESHUIPINGDIZHENZUOYONG、FENGZAIZUOYONGDEDAIDIXIASHIDEGAODAJIANZHUWUZHUANGJIDESHUIPINGWEIYISHI,KEKAOLVDIXIASHICEQIANG、CHENGTAI、ZHUANGQUN、TUGONGTONGZUOYONG,ANBENGUIFANFULUCFANGFAJISUANJIZHUANGNEILIHEBIANWEI,YUSHUIPINGWAILIZUOYONGPINGMIANXIANGCHUIZHIDEDANPAIZHUANGJICHUKEANBENGUIFANFULUCZHONGBIAOC.0.3-1JISUAN。

5.7.5 桩的水平变形系数和地基土水平抗力系数的比例系数m可按下列规定确定:

    1 ZHUANGDESHUIPINGBIANXINGXISHUa(1/m)

    2 地基土水平抗力系数的比例系数m,宜通过单桩水平静载试验确定,当无静载试验资料时,可按表5.7.5取值。


▼ 展开条文说明

5.8 桩身承载力与裂缝控制计算

5.8.1 桩身应进行承载力和裂缝控制计算。计算时应考虑桩身材料强度、成桩工艺、吊运与沉桩、约束条件、环境类别等因素,除按本节有关规定执行外,尚应符合现行国家标准《混凝土结构设计规范》GB 50010、《钢结构设计规范》GB 50017和《建筑抗震设计规范》GB 50011的有关规定。

Ⅰ受压桩

5.8.2 钢筋混凝土轴心受压桩正截面受压承载力应符合下列规定:

    1 DANGZHUANGDINGYIXIA5dFANWEIDEZHUANGSHENLUOXUANSHIGUJINJIANJUBUDAYU100mm,QIEFUHEBENGUIFANDI4.1.1TIAOGUIDINGSHI:


▼ 展开条文说明

5.8.4 计算轴心受压混凝土桩正截面受压承载力时,一般取稳定系数φ=1.0。对于高承台基桩、桩身穿越可液化土或不排水抗剪强度小于10kPa的软弱土层的基桩,应考虑压屈影响,可按本规范式(5.8.2-1)、式(5.8.2-2)计算所得桩身正截面受压承载力乘以φ折减。其稳定系数φ可根据桩身压屈计算长度lc和桩的设计直径d(或矩形桩短边尺寸6)确定。桩身压屈计算长度可根据桩顶的约束情况、桩身露出地面的自由长度l0、桩的入土长度h 、桩侧和桩底的土质条件按表5.8.4-1确定。桩的稳定系数φ可按表5.8.4-2确定。
▼ 展开条文说明

 

Ⅱ 抗拔桩

5.8.7 钢筋混凝土轴心抗拔桩的正截面受拉承载力应符合下式规定:


▼ 展开条文说明

5.8.9 当考虑地震作用验算桩身抗拔承载力时,应根据现行国家标准《建筑抗震设计规范》GB 50011的规定,对作用于桩顶的地震作用效应进行调整。

Ⅲ受水平作用桩

5.8.10 对于受水平荷载和地震作用的桩,其桩身受弯承载力和受剪承载力的验算应符合下列规定:

亚博体育彩票    1 DUIYUZHUANGDINGGUDUANDEZHUANG,YINGYANSUANZHUANGDINGZHENGJIEMIANWANJU;DUIYUZHUANGDINGZIYOUHUOJIAOJIEDEZHUANG,YINGYANSUANZHUANGSHENZUIDAWANJUJIEMIANCHUDEZHENGJIEMIANWANJU;

    2 YINGYANSUANZHUANGDINGXIEJIEMIANDESHOUJIANCHENGZAILI;

    3 ZHUANGSHENSUOCHENGSHOUZUIDAWANJUHESHUIPINGJIANLIDEJISUAN,KEANBENGUIFANFULUCJISUAN;

亚博体育彩票    4 ZHUANGSHENZHENGJIEMIANSHOUWANCHENGZAILIHEXIEJIEMIANSHOUJIANCHENGZAILI,YINGANXIANXINGGUOJIABIAOZHUN《HUNNINGTUJIEGOUSHEJIGUIFAN》GB 50010ZHIXING;

    5 DANGKAOLVDIZHENZUOYONGYANSUANZHUANGSHENZHENGJIEMIANSHOUWANHEXIEJIEMIANSHOUJIANCHENGZAILISHI,YINGGENJUXIANXINGGUOJIABIAOZHUN《JIANZHUKANGZHENSHEJIGUIFAN》GB 50011DEGUIDING,DUIZUOYONGYUZHUANGDINGDEDIZHENZUOYONGXIAOYINGJINXINGDIAOZHENG。 

Ⅳ预制桩吊运和锤击验算
▼ 展开条文说明

5.8.11 预制桩吊运时单吊点和双吊点的设置,应按吊点(或支点)跨间正弯矩与吊点处的负弯矩相等的原则进行布置。考虑预制桩吊运时可能受到冲击和振动的影响,计算吊运弯矩和吊运拉力时,可将桩身重力乘以1.5的动力系数。

5.8.12 对于裂缝控制等级为一级、二级的混凝土预制桩、预应力混凝土管桩,可按下列规定验算桩身的锤击压应力和锤击拉应力:

 

亚博体育彩票    3 ZUIDACHUIJIYAYINGLIHEZUIDACHUIJILAYINGLIFENBIEBUYINGCHAOGUOHUNNINGTUDEZHOUXINKANGYAQIANGDUSHEJIZHIHEZHOUXINKANGLAQIANGDUSHEJIZHI。


5.9 承台计算


Ⅰ受弯计算

5.9.1 桩基承台应进行正截面受弯承载力计算。承台弯距可按本规范第5.9.2~5.9.5条的规定计算,受弯承载力和配筋可按现行国家标准《混凝土结构设计规范》GB 50010的规定进行。
▼ 展开条文说明

5.9.2 柱下独立桩基承台的正截面弯矩设计值可按下列规定计算:

    1 LIANGZHUANGTIAOXINGCHENGTAIHEDUOZHUANGJUXINGCHENGTAIWANJUJISUANJIEMIANQUZAIZHUBIANHECHENGTAIBIANJIECHU[JIANTU5.9.2(a)],KEANXIALIEGONGSHIJISUAN:

 


▼ 展开条文说明

5.9.3 箱形承台和筏形承台的弯距可按下列规定计算:

亚博体育彩票    1 XIANGXINGCHENGTAIHEFAXINGCHENGTAIDEWANJUYIKAOLVDIJITUCENGXINGZHI、JIZHUANGFENBU、CHENGTAIHESHANGBUJIEGOULEIXINGHEGANGDU,ANDIJI—ZHUANG—CHENGTAI—SHANGBUJIEGOUGONGTONGZUOYONGYUANLIFENXIJISUAN;

    2 DUIYUXIANGXINGCHENGTAI,DANGZHUANGDUANCHILICENGWEIJIYAN、MISHIDESUISHILEITU、SHATUQIESHENHOUJUNYUNSHI;HUODANGSHANGBUJIEGOUWEIJIANLIQIANG;HUODANGSHANGBUJIEGOUWEIKUANGJIA-HEXINTONGJIEGOUQIEANBIANGANGDUDIAOPINGYUANZEBUZHUANGSHI,XIANGXINGCHENGTAIDIBANKEJINANJUBUWANJUZUOYONGJINXINGJISUAN;

    3 对于筏形承台,当桩端持力层深厚坚硬、上部结构刚度较好,且柱荷载及柱间距的变化不超过20%时;或当上部结构为框架-核心筒结构且按变刚度调平原则布桩时,可仅按局部弯矩作用进行计算。
▼ 展开条文说明

5.9.4 柱下条形承台梁的弯矩可按下列规定计算:

亚博体育彩票    1 KEANDANXINGDIJILIANG(DIJIJISUANMOXINGYINGGENJUDIJITUCENGTEXINGXUANQU)JINXINGFENXIJISUAN;

    2 当桩端持力层深厚坚硬且桩柱轴线不重合时,可视桩为不动铰支座,按连续梁计算。
▼ 展开条文说明

5.9.5 砌体墙下条形承台梁,可按倒置弹性地基梁计算弯矩和剪力,并应符合本规范附录G的要求。对于承台上的砌体墙,尚应验算桩顶部位砌体的局部承压强度。
▼ 展开条文说明

Ⅱ受冲切计算

5.9.6 桩基承台厚度应满足柱(墙)对承台的冲切和基桩对承台的冲切承载力要求。

5.9.7 轴心竖向力作用下桩基承台受柱(墙)的冲切,可按下列规定计算:

亚博体育彩票    1 CHONGQIEPOHUAIZHUITIYINGCAIYONGZIZHU(QIANG)BIANHUOCHENGTAIBIANJIECHUZHIXIANGYINGZHUANGDINGBIANYUANLIANXIANSUOGOUCHENGDEZHUITI,ZHUITIXIEMIANYUCHENGTAIDIMIANZHIJIAJIAOBUYINGXIAOYU45°(JIANTU5.9.7)。

    2 SHOUZHU(QIANG)CHONGQIECHENGZAILIKEANXIALIEGONGSHIJISUAN:

 

 


▼ 展开条文说明

Ⅲ受剪计算

5.9.9 柱(墙)下桩基承台,应分别对柱(墙)边、变阶处和桩边联线形成的贯通承台的斜截面的受剪承载力进行验算。当承台悬挑边有多排基桩形成多个斜截面时,应对每个斜截面的受剪承载力进行验算。
▼ 展开条文说明

5.9.10 柱下独立桩基承台斜截面受剪承载力应按下列规定计算:

亚博体育彩票    1 CHENGTAIXIEJIEMIANSHOUJIANCHENGZAILIKEANXIALIEGONGSHIJISUAN(JIANTU5.9.10-1):

             
▼ 展开条文说明

Ⅳ局部受压计算

5.9.15 对于柱下桩基,当承台混凝土强度等级低于柱或桩的混凝土强度等级时,应验算柱下或桩上承台的局部受压承载力。
▼ 展开条文说明

Ⅴ抗震验算

5.9.16 当进行承台的抗震验算时,应根据现行国家标准《建筑抗震设计规范》GB 50011的规定对承台顶面的地震作用效应和承台的受弯、受冲切、受剪承载力进行抗震调整。
▼ 展开条文说明


6灌注桩施工

6.1 施工准备

6.1.1 GUANZHUZHUANGSHIGONGYINGJUBEIXIALIEZILIAO:

    1 JIANZHUCHANGDIYANTUGONGCHENGKANCHABAOGAO;

亚博体育彩票    2 ZHUANGJIGONGCHENGSHIGONGTUJITUZHIHUISHENJIYAO;

    3 JIANZHUCHANGDIHELINJINQUYUNEIDEDIXIAGUANXIAN、DIXIAGOUZHUWU、WEIFANG、JINGMIYIQICHEJIANDENGDEDIAOCHAZILIAO;

亚博体育彩票    4 ZHUYAOSHIGONGJIXIEJIQIPEITAOSHEBEIDEJISHUXINGNENGZILIAO;

亚博体育彩票    5 ZHUANGJIGONGCHENGDESHIGONGZUZHISHEJI;

    6 SHUINI、SHA、SHI、GANGJINDENGYUANCAILIAOJIQIZHIPINDEZHIJIANBAOGAO;

    7 有关荷载、施工工艺的试验参考资料。

6.1.2 钻孔机具及工艺的选择,应根据桩型、钻孔深度、土层情况、泥浆排放及处理条件综合确定。

6.1.3 施工组织设计应结合工程特点,有针对性地制定相应质量管理措施,主要应包括下列内容:

亚博体育彩票    1 SHIGONGPINGMIANTU:BIAOMINGZHUANGWEI、BIANHAO、SHIGONGSHUNXU、SHUIDIANXIANLUHELINSHISHESHIDEWEIZHI;CAIYONGNIJIANGHUBICHENGKONGSHI,YINGBIAOMINGNIJIANGZHIBEISHESHIJIQIXUNHUANXITONG;

    2 QUEDINGCHENGKONGJIXIE、PEITAOSHEBEIYIJIHELISHIGONGGONGYIDEYOUGUANZILIAO,NIJIANGHUBIGUANZHUZHUANGBIXUYOUNIJIANGCHULICUOSHI;

    3 SHIGONGZUOYEJIHUAHELAODONGLIZUZHIJIHUA;

    4 JIXIESHEBEI、BEIJIAN、GONGJU、CAILIAOGONGYINGJIHUA;

亚博体育彩票    5 ZHUANGJISHIGONGSHI,DUIANQUAN,LAODONGBAOHU、FANGHUO、FANGYU、FANGTAIFENG、BAOPOZUOYE、WENWUHEHUANJINGBAOHUDENGFANGMIANYINGANYOUGUANGUIDINGZHIXING;

    6 保证工程质量、安全生产和季节性施工的技术措施。

6.1.4 成桩机械必须经鉴定合格,不得使用不合格机械。

6.1.5 施工前应组织图纸会审,会审纪要连同施工图等应作为施工依据,并应列入工程档案。

6.1.6 桩基施工用的供水、供电、道路、排水、临时房屋等临时设施,必须在开工前准备就绪,施工场地应进行平整处理,保证施工机械正常作业。

6.1.7 基桩轴线的控制点和水准点应设在不受施工影响的地方。开工前,经复核后应妥善保护,施工中应经常复测。

6.1.8 用于施工质量检验的仪表、器具的性能指标,应符合现行国家相关标准的规定。


6.2 一般规定

亚博体育彩票6.2.1 BUTONGZHUANGXINGDESHIYONGTIAOJIANYINGFUHEXIALIEGUIDING:

    1 NIJIANGHUBIZUANKONGGUANZHUZHUANGYIYONGYUDIXIASHUIWEIYIXIADENIANXINGTU、FENTU、SHATU、TIANTU、SUISHITUJIFENGHUAYANCENG;

    2 XUANWACHENGKONGGUANZHUZHUANGYIYONGYUNIANXINGTU、FENTU、SHATU、TIANTU、SUISHITUJIFENGHUAYANCENG;

    3 CHONGKONGGUANZHUZHUANGCHUYIYONGYUSHANGSHUDIZHIQINGKUANGWAI,HAINENGCHUANTOUJIUJICHU、JIANZHULAJITIANTUHUODAGUSHIDENGZHANGAIWU。ZAIYANRONGFAYUDIQUYINGSHENZHONGSHIYONG,CAIYONGSHI,YINGSHIDANGJIAMIKANCHAZUANKONG;

    4 ZHANGLUOXUANZUANKONGYAGUANZHUANGHOUCHAGANGJINLONGYIYONGYUNIANXINGTU、FENTU、SHATU、TIANTU、FEIMISHIDESUISHILEITU、QIANGFENGHUAYAN;

亚博体育彩票    5 GANZUOYEZUAN、WAKONGGUANZHUZHUANGYIYONGYUDIXIASHUIWEIYISHANGDENIANXINGTU、FENTU、TIANTU、ZHONGDENGMISHIYISHANGDESHATU、FENGHUAYANCENG;

    6 ZAIDIXIASHUIWEIJIAOGAO,YOUCHENGYASHUIDESHATUCENG、ZHISHUICENG、HOUDUJIAODADELIUSUZHUANGYUNI、YUNIZHITUCENGZHONGBUDEXUANYONGRENGONGWAKONGGUANZHUZHUANG;

    7 沉管灌注桩宜用于黏性土、粉土和砂土;夯扩桩宜用于桩端持力层为埋深不超过20m的中、低压缩性黏性土、粉土、砂土和碎石类土。
▼ 展开条文说明

6.2.2 成孔设备就位后,必须平整、稳固,确保在成孔过程中不发生倾斜和偏移。应在成孔钻具上设置控制深度的标尺,并应在施工中进行观测记录。

6.2.3 成孔的控制深度应符合下列要求:

    1 MOCAXINGZHUANG:MOCAZHUANGYINGYISHEJIZHUANGZHANGKONGZHICHENGKONGSHENDU;DUANCHENGMOCAZHUANGBIXUBAOZHENGSHEJIZHUANGZHANGJIZHUANGDUANJINRUCHILICENGSHENDU。DANGCAIYONGCHUIJICHENGUANFACHENGKONGSHI,ZHUANGGUANRUTUSHENDUKONGZHIYINGYIBIAOGAOWEIZHU,YIGUANRUDUKONGZHIWEIFU。

    2 端承型桩:当采用钻(冲)、挖掘成孔时,必须保证桩端进入持力层的设计深度;当采用锤击沉管法成孔时,桩管入土深度控制以贯入度为主,以控制标高为辅。
▼ 展开条文说明

6.2.4 灌注桩成孔施工的允许偏差应满足表6.2.4的要求。

6.2.5 钢筋笼制作、安装的质量应符合下列要求:

    1 钢筋笼的材质、尺寸应符合设计要求,制作允许偏差应符合表6.2.5的规定:    
    

    2 FENDUANZHIZUODEGANGJINLONG,QIJIETOUYICAIYONGHANJIEHUOJIXIESHIJIETOU(GANGJINZHIJINGDAYU20mm),BINGYINGZUNSHOUGUOJIAXIANXINGBIAOZHUN《GANGJINJIXIELIANJIETONGYONGJISHUGUICHENG》JGJ 107、《GANGJINHANJIEJIYANSHOUGUICHENG》JGJ 18HE《HUNNINGTUJIEGOUGONGCHENGSHIGONGZHILIANGYANSHOUGUIFAN》GB 50204DEGUIDING;

    3 JIAJINGGUYISHEZAIZHUJINWAICE,DANGYINSHIGONGGONGYIYOUTESHUYAOQIUSHIYEKEZHIYUNEICE;

    4 DAOGUANJIETOUCHUWAIJINGYINGBIGANGJINLONGDENEIJINGXIAO100mmYISHANG;

亚博体育彩票    5 BANYUNHEDIAOZHUANGGANGJINLONGSHI,YINGFANGZHIBIANXING,ANFANGYINGDUIZHUNKONGWEI,BIMIANPENGZHUANGKONGBIHEZIYOULUOXIA,JIUWEIHOUYINGLIJIGUDING。

6.2.6 粗骨料可选用卵石或碎石,其粒径不得大于钢筋间最小净距的1/3。

6.2.7 检查成孔质量合格后应尽快灌注混凝土。直径大于1m或单桩混凝土量超过25m3的桩,每根桩桩身混凝土应留有1组试件;直径不大于1m的桩或单桩混凝土量不超过25m3的桩,每个灌注台班不得少于1组;每组试件应留3件。

6.2.8 在正式施工前,宜进行试成孔。

6.2.9 灌注桩施工现场所有设备、设施、安全装置、工具配件以及个人劳保用品必须经常检查,确保完好和使用安全。


6.3 泥浆护壁成孔灌注桩

ⅠNIJIANGDEZHIBEIHECHULI


   6.3.1 除能自行造浆的黏性土层外,均应制备泥浆。泥浆制备应选用高塑性黏土或膨润土。泥浆应根据施工机械、工艺及穿越土层情况进行配合比设计。

6.3.2 泥浆护壁应符合下列规定:

    1 SHIGONGQIJIANHUTONGNEIDENIJIANGMIANYINGGAOCHUDIXIASHUIWEI1.0mYISHANG,ZAISHOUSHUIWEIZHANGLUOYINGXIANGSHI,NIJIANGMIANYINGGAOCHUZUIGAOSHUIWEI1.5mYISHANG;

    2 ZAIQINGKONGGUOCHENGZHONG,YINGBUDUANZHIHUANNIJIANG,ZHIZHIGUANZHUSHUIXIAHUNNINGTU;

    3 GUANZHUHUNNINGTUQIAN,KONGDI500mmYINEIDENIJIANGXIANGDUIMIDUYINGXIAOYU1.25;HANSHALVBUDEDAYU8%;NIANDUBUDEDAYU28s;

    4 在容易产生泥浆渗漏的土层中应采取维持孔壁稳定的措施。
▼ 展开条文说明

6.3.3 废弃的浆、渣应进行处理,不得污染环境。


   Ⅱ正、反循环钻孔灌注桩的施工


   6.3.4 对孔深较大的端承型桩和粗粒土层中的摩擦型桩,宜采用反循环工艺成孔或清孔,也可根据土层情况采用正循环钻进,反循环清孔。

6.3.5 泥浆护壁成孔时,宜采用孔口护筒,护筒设置应符合下列规定:

亚博体育彩票    1 HUTONGMAISHEYINGZHUNQUE、WENDING,HUTONGZHONGXINYUZHUANGWEIZHONGXINDEPIANCHABUDEDAYU50mm;

亚博体育彩票    2 HUTONGKEYONG4~8mmHOUGANGBANZHIZUO,QINEIJINGYINGDAYUZUANTOUZHIJING100mm,SHANGBUYIKAISHE1~2GEYIJIANGKONG;

    3 HUTONGDEMAISHESHENDU:ZAINIANXINGTUZHONGBUYIXIAOYU1.0m;SHATUZHONGBUYIXIAOYU1.5m。HUTONGXIADUANWAICEYINGCAIYONGNIANTUTIANSHI;QIGAODUSHANGYINGMANZUKONGNEINIJIANGMIANGAODUDEYAOQIU;

亚博体育彩票    4 SHOUSHUIWEIZHANGLUOYINGXIANGHUOSHUIXIASHIGONGDEZUANKONGGUANZHUZHUANG,HUTONGYINGJIAGAOJIASHEN,BIYAOSHIYINGDARUBUTOUSHUICENG。

6.3.6 当在软土层中钻进时,应根据泥浆补给情况控制钻进速度;在硬层或岩层中的钻进速度应以钻机不发生跳动为准。

6.3.7 钻机设置的导向装置应符合下列规定:

    1 QIANSHUIZUANDEZUANTOUSHANGYINGYOUBUXIAOYU3dZHANGDUDEDAOXIANGZHUANGZHI;

亚博体育彩票    2 LIYONGZUANGANJIAYADEZHENGXUNHUANHUIZHUANZUANJI,ZAIZUANJUZHONGYINGJIASHEFUZHENGQI。

6.3.8 如在钻进过程中发生斜孔、塌孔和护筒周围冒浆、失稳等现象时,应停钻,待采取相应措施后再进行钻进。

6.3.9 钻孔达到设计深度,灌注混凝土之前,孔底沉渣厚度指标应符合下列规定:

    1 DUIDUANCHENGXINGZHUANG,BUYINGDAYU50mm;

    2 DUIMOCAXINGZHUANG,BUYINGDAYU100mm;

    3 对抗拔、抗水平力桩,不应大于200mm。
▼ 展开条文说明

ⅢCHONGJICHENGKONGGUANZHUZHUANGDESHIGONG


亚博体育彩票6.3.10 在钻头锥顶和提升钢丝绳之间应设置保证钻头自动转向的装置。

6.3.11 冲孔桩孔口护筒,其内径应大于钻头直径200mm,护筒应按本规范第6.3.5条设置。

6.3.12 泥浆的制备、使用和处理应符合本规范第6.3.1~6.3.3条的规定。

6.3.13 冲击成孔质量控制应符合下列规定:

    1 KAIKONGSHI,YINGDICHUIMIJI,DANGBIAOTUWEIYUNI、XISHADENGRUANRUOTUCENGSHI,KEJIANIANTUKUAIJIAXIAOPIANSHIFANFUCHONGJIZAOBI,KONGNEINIJIANGMIANYINGBAOCHIWENDING;

亚博体育彩票    2 ZAIGEZHONGBUTONGDETUCENG、YANCENGZHONGCHENGKONGSHI,KEANZHAOBIAO6.3.13DECAOZUOYAODIANJINXING;

    3 JINRUJIYANHOU,YINGCAIYONGDACHONGCHENG、DIPINLVCHONGJI,DANGFAXIANCHENGKONGPIANYISHI,YINGHUITIANPIANSHIZHIPIANKONGSHANGFANG300~500mmCHU,RANHOUZHONGXINCHONGKONG;

    4 DANGYUDAOGUSHISHI,KEYUBAOHUOCAIYONGGAODICHONGCHENGJIAOTICHONGJI,JIANGDAGUSHIJISUIHUOJIRUKONGBI;

    5 YINGCAIQUYOUXIAODEJISHUCUOSHIFANGZHIRAODONGKONGBI、TAKONG、KUOKONG、KAZUANHEDIAOZUANJINIJIANGLIUSHIDENGSHIGU;

    6 MEIZUANJIN4~5mYINGYANKONGYICI,ZAIGENGHUANZUANTOUQIANHUORONGYISUOKONGCHU,JUNYINGYANKONG;

亚博体育彩票    7 JINRUJIYANHOU,FEIZHUANGDUANCHILICENGMEIZUANJIN300~500mmHEZHUANGDUANCHILICENGMEIZUANJIN100~300mSHI,YINGQINGKONGQUYANGYICI,BINGYINGZUOJILU。

6.3.14 排渣可采用泥浆循环或抽渣筒等方法,当采用抽渣筒排渣时,应及时补给泥浆。

6.3.15 冲孔中遇到斜孔、弯孔、梅花孔、塌孔及护筒周围冒浆、失稳等情况时,应停止施工,采取措施后方可继续施工。

6.3.16 大直径桩孔可分级成孔,第一级成孔直径应为设计桩径的0.6~0.8倍。

6.3.17 清孔宜按下列规定进行:

亚博体育彩票    1 BUYITAKONGDEZHUANGKONG,KECAIYONGKONGQIXINIQINGKONG;

    2 WENDINGXINGCHADEKONGBIYINGCAIYONGNIJIANGXUNHUANHUOCHOUZHATONGPAIZHA,QINGKONGHOUGUANZHUHUNNINGTUZHIQIANDENIJIANGZHIBIAOYINGANBENGUIFANDI6.3.1TIAOZHIXING;

    3 QINGKONGSHI,KONGNEINIJIANGMIANYINGFUHEBENGUIFANDI6.3.2TIAODEGUIDING;

    4 GUANZHUHUNNINGTUQIAN,KONGDICHENZHAYUNXUHOUDUYINGFUHEBENGUIFANDI6.3.9TIAODEGUIDING。


   Ⅳ旋挖成孔灌注桩的施工


   6.3.18 旋挖钻成孔灌注桩应根据不同的地层情况及地下水位埋深,采用干作业成孔和泥浆护壁成孔工艺,干作业成孔工艺可按本规范第6.6节执行。

6.3.19 泥浆护壁旋挖钻机成孔应配备成孔和清孔用泥浆及泥浆池(箱),在容易产生泥浆渗漏的土层中可采取提高泥浆相对密度,掺入锯末、增黏剂提高泥浆黏度等维持孔壁稳定的措施。

6.3.20 泥浆制备的能力应大于钻孔时的泥浆需求量,每台套钻机的泥浆储备量不应少于单桩体积。

6.3.21 旋挖钻机施工时,应保证机械稳定、安全作业,必要时可在场地辅设能保证其安全行走和操作的钢板或垫层(路基板)。

6.3.22 每根桩均应安设钢护筒,护筒应满足本规范第6.3.5条的规定。

6.3.23 成孔前和每次提出钻斗时,应检查钻斗和钻杆连接销子、钻斗门连接销子以及钢丝绳的状况,并应清除钻斗上的渣土。 

6.3.24 旋挖钻机成孔应采用跳挖方式,钻斗倒出的土距桩孔口的最小距离应大于6m,并应及时清除。应根据钻进速度同步补充泥浆,保持所需的泥浆面高度不变。
▼ 展开条文说明

6.3.25 钻孔达到设计深度时,应采用清孔钻头进行清孔,并应满足本规范第6.3.2条和第6.3.3条要求。孔底沉渣厚度控制指标应符合本规范第6.3.9条规定。
▼ 展开条文说明

ⅤSHUIXIAHUNNINGTUDEGUANZHU


   6.3.26 钢筋笼吊装完毕后,应安置导管或气泵管二次清孔,并应进行孔位、孔径、垂直度、孔深,沉渣厚度等检验,合格后应立即灌注混凝土。

6.3.27 水下灌注的混凝土应符合下列规定:

亚博体育彩票    1 SHUIXIAGUANZHUHUNNINGTUBIXUJUBEILIANGHAODEHEYIXING,PEIHEBIYINGTONGGUOSHIYANQUEDING;TANLUODUYIWEI180~220mm;SHUINIYONGLIANGBUYINGSHAOYU360kg/m3(DANGCHANRUFENMEIHUISHISHUINIYONGLIANGKEBUSHOUCIXIAN);

    2 SHUIXIAGUANZHUHUNNINGTUDEHANSHALVYIWEI40%~50%,BINGYIXUANYONGZHONGCUSHA;CUGULIAODEZUIDALIJINGYINGXIAOYU40mm;BINGYINGMANZUBENGUIFANDI6.2.6TIAODEYAOQIU;

    3 水下灌注混凝土宜掺外加剂。
▼ 展开条文说明

6.3.28 导管的构造和使用应符合下列规定:

亚博体育彩票    1 DAOGUANBIHOUBUYIXIAOYU3mm,ZHIJINGYIWEI200~250mm,ZHIJINGZHIZUOPIANCHABUYINGCHAOGUO2mm,DAOGUANDEFENJIEZHANGDUKESHIGONGYIYAOQIUQUEDING,DIGUANZHANGDUBUYIXIAOYU4m,JIETOUYICAIYONGSHUANGLUOWENFANGKOUKUAISUJIETOU;

亚博体育彩票    2 DAOGUANSHIYONGQIANYINGSHIPINZHUANG、SHIYA,SHISHUIYALIKEQUWEI0.6~1.0MPa;

亚博体育彩票    3 MEICIGUANZHUHOUYINGDUIDAOGUANNEIWAIJINXINGQINGXI。

6.3.29 使用的隔水栓应有良好的隔水性能,并应保证顺利排出;隔水栓宜采用球胆或与桩身混凝土强度等级相同的细石混凝土制作。

6.3.30 灌注水下混凝土的质量控制应满足下列要求:

    1 KAISHIGUANZHUHUNNINGTUSHI,DAOGUANDIBUZHIKONGDIDEJULIYIWEI300~500mm;

    2 YINGYOUZUGOUDEHUNNINGTUCHUBEILIANG,DAOGUANYICIMAIRUHUNNINGTUGUANZHUMIANYIXIABUYINGSHAOYU0.8m;

    3 DAOGUANMAIRUHUNNINGTUSHENDUYIWEI2~6m。YANJINJIANGDAOGUANTICHUHUNNINGTUGUANZHUMIAN,BINGYINGKONGZHITIBADAOGUANSUDU,YINGYOUZHUANRENCELIANGDAOGUANMAISHENJIGUANNEIWAIHUNNINGTUGUANZHUMIANDEGAOCHA,TIANXIESHUIXIAHUNNINGTUGUANZHUJILU;

    4 GUANZHUSHUIXIAHUNNINGTUBIXULIANXUSHIGONG,MEIGENZHUANGDEGUANZHUSHIJIANYINGANCHUPANHUNNINGTUDECHUNINGSHIJIANKONGZHI,DUIGUANZHUGUOCHENGZHONGDEGUZHANGYINGJILUBEIAN;

    5 应控制最后一次灌注量,超灌高度宜为0.8~1.0m,凿除泛浆后必须保证暴露的桩顶混凝土强度达到设计等级。
▼ 展开条文说明


6.4 长螺旋钻孔压灌桩

亚博体育彩票6.4.1 DANGXUYAOCHUANYUELAONIANTU、HOUCENGSHATU、SUISHITUYIJISUXINGZHISHUDAYU25DENIANTUSHI,YINGJINXINGSHIZUAN。

6.4.2 钻机定位后,应进行复检,钻头与桩位点偏差不得大于20mm,开孔时下钻速度应缓慢;钻进过程中,不宜反转或提升钻杆。

6.4.3 钻进过程中,当遇到卡钻、钻机摇晃、偏斜或发生异常声响时,应立即停钻,查明原因,采取相应措施后方可继续作业。

6.4.4 根据桩身混凝土的设计强度等级,应通过试验确定混凝土配合比;混凝土坍落度宜为180~220mm粗骨料可采用卵石或碎石,最大粒径不宜大于30mm;可掺加粉煤灰或外加剂。

6.4.5 混凝土泵型号应根据桩径选择,混凝土输送泵管布置宜减少弯道,混凝土泵与钻机的距离不宜超过60m。

6.4.6 桩身混凝土的泵送压灌应连续进行,当钻机移位时,混凝土泵料斗内的混凝土应连续搅拌,泵送混凝土时,料斗内混凝土的高度不得低于400mm。

6.4.7 混凝土输送泵管宜保持水平,当长距离泵送时,泵管下面应垫实。

6.4.8 当气温高于30℃时,宜在输送泵管上覆盖隔热材料,每隔一段时间应洒水降温。

6.4.9 钻至设计标高后,应先泵入混凝土并停顿10~20s,再缓慢提升钻杆。提钻速度应根据土层情况确定,且应与混凝土泵送量相匹配,保证管内有一定高度的混凝土。

6.4.10 在地下水位以下的砂土层中钻进时,钻杆底部活门应有防止进水的措施,压灌混凝土应连续进行。

6.4.11 压灌桩的充盈系数宜为1.0~1.2。桩顶混凝土超灌高度不宜小于0.3~0.5m。

6.4.12 成桩后,应及时清除钻杆及泵管内残留混凝土。长时间停置时,应采用清水将钻杆、泵管、混凝土泵清洗干净。

6.4.13 混凝土压灌结束后,应立即将钢筋笼插至设计深度。钢筋笼插设宜采用专用插筋器。
▼ 展开条文说明


6.5 沉管灌注桩和内夯沉管灌注桩


▼ 展开条文说明


   Ⅰ锤击沉管灌注桩施工


   6.5.1 锤击沉管灌注桩施工应根据土质情况和荷载要求,分别选用单打法、复打法或反插法。

6.5.2 锤击沉管灌注桩施工应符合下列规定;

    1 QUNZHUANGJICHUDEJIZHUANGSHIGONG,YINGGENJUTUZHI、BUZHUANGQINGKUANG,CAIQUXIAOJIANFUMIANJITUXIAOYINGDEJISHUCUOSHI,QUEBAOCHENGZHUANGZHILIANG;

亚博体育彩票    2 ZHUANGGUAN、HUNNINGTUYUZHIZHUANGJIANHUOGANGZHUANGJIANDEJIAGONGZHILIANGHEMAISHEWEIZHIYINGYUSHEJIXIANGFU,ZHUANGGUANYUZHUANGJIANDEJIECHUYINGYOULIANGHAODEMIFENGXING。

6.5.3 灌注混凝土和拔管的操作控制应符合下列规定:

亚博体育彩票    1 CHENGUANZHISHEJIBIAOGAOHOU,YINGLIJIJIANCHAHECHULIZHUANGGUANNEIDEJINNI、JINSHUIHETUNZHUANGJIANDENGQINGKUANG,BINGLIJIGUANZHUHUNNINGTU;

    2 DANGZHUANGSHENPEIZHIJUBUZHANGDUGANGJINLONGSHI,DIYICIGUANZHUHUNNINGTUYINGXIANGUANZHILONGDIBIAOGAO,RANHOUFANGZHIGANGJINLONG,ZAIGUANZHIZHUANGDINGBIAOGAO。DIYICIBAGUANGAODUYINGYINENGRONGNADIERCIGUANRUDEHUNNINGTULIANGWEIXIAN。ZAIBAGUANGUOCHENGZHONGYINGCAIYONGCECHUIHUOFUBIAOJIANCEHUNNINGTUMIANDEXIAJIANGQINGKUANG;

    3 BAGUANSUDUYINGBAOCHIJUNYUN,DUIYIBANTUCENGBAGUANSUDUYIWEI1m/min,ZAIRUANRUOTUCENGHERUANYINGTUCENGJIAOJIECHUBAGUANSUDUYIKONGZHIZAI0.3~0.8m/min;

    4 CAIYONGDAODABAGUANDEDAJICISHU,DANDONGQICHUIBUDESHAOYU50CI/min,ZIYOULUOCHUIXIAOLUOJUQINGJIBUDESHAOYU40CI/min;ZAIGUANDIWEIBAZHIZHUANGDINGSHEJIBIAOGAOZHIQIAN,DAODAHEQINGJIBUDEZHONGDUAN。

6.5.4 混凝土的充盈系数不得小于1.0;对于充盈系数小于1.0的桩,应全长复打,对可能断桩和缩颈桩,应进行局部复打。成桩后的桩身混凝土顶面应高于桩顶设计标高500mm以内。全长复打时,桩管入土深度宜接近原桩长,局部复打应超过断桩或缩颈区1m以上。

6.5.5 全长复打桩施工时应符合下列规定:

    1 DIYICIGUANZHUHUNNINGTUYINGDADAOZIRANDIMIAN;

亚博体育彩票    2 BAGUANGUOCHENGZHONGYINGJISHIQINGCHUZHANZAIGUANBISHANGHESANLUOZAIDIMIANSHANGDEHUNNINGTU;

    3 CHUDAYUFUDADEZHUANGZHOUXIANYINGZHONGHE;

    4 FUDASHIGONGBIXUZAIDIYICIGUANZHUDEHUNNINGTUCHUNINGZHIQIANWANCHENG。

6.5.6 混凝土的坍落度宜为80~100mm。


   Ⅱ振动、振动冲击沉管灌注桩施工


亚博体育彩票   6.5.7 振动、振动冲击沉管灌注桩应根据土质情况和荷载要求,分别选用单打法、复打法、反插法等。单打法可用于含水量较小的土层,且宜采用预制桩尖;反插法及复打法可用于饱和土层。

6.5.8 振动、振动冲击沉管灌注桩单打法施工的质量控制应符合下列规定:

    1 BIXUYANGEKONGZHIZUIHOU30sDEDIANLIU、DIANYAZHI,QIZHIANSHEJIYAOQIUHUOGENJUSHIZHUANGHEDANGDIJINGYANQUEDING;

亚博体育彩票    2 ZHUANGGUANNEIGUANMANHUNNINGTUHOU,YINGXIANZHENDONG5~10s,ZAIKAISHIBAGUAN,YINGBIANZHENBIANBA,HAIBACHU0.5~1.0m,TINGBA,ZHENDONG5~10s;RUCIFANFU,ZHIZHIZHUANGGUANQUANBUBACHU;

    3 ZAIYIBANTUCENGNEI,BAGUANSUDUYIWEI1.2~1.5m/min,YONGHUOBANZHUANGJIANSHIYIMAN,YONGYUZHIZHUANGJIANSHIKESHIDANGJIAKUAI;ZAIRUANRUOTUCENGZHONGYIKONGZHIZAI0.6~0.8m/min。

6.5.9 振动、振动冲击沉管灌注桩反插法施工的质量控制应符合下列规定;

亚博体育彩票    1 ZHUANGGUANGUANMANHUNNINGTUHOU,XIANZHENDONGZAIBAGUAN,MEICIBAGUANGAODU0.5~1.0m,FANCHASHENDU0.3~0.5m;ZAIBAGUANGUOCHENGZHONG,YINGFENDUANTIANJIAHUNNINGTU,BAOCHIGUANNEIHUNNINGTUMIANSHIZHONGBUDIYUDIBIAOMIANHUOGAOYUDIXIASHUIWEI1.0~1.5mYISHANG,BAGUANSUDUYINGXIAOYU0.5m/min;

    2 ZAIJUZHUANGJIANCHU1.5mFANWEINEI,YIDUOCIFANCHAYIKUODAZHUANGDUANBUDUANMIAN;

亚博体育彩票    3 CHUANGUOYUNIJIACENGSHI,YINGJIANMANBAGUANSUDU,BINGJIANSHAOBAGUANGAODUHEFANCHASHENDU,ZAILIUDONGXINGYUNIZHONGBUYISHIYONGFANCHAFA。

6.5.10 振动、振动冲击沉管灌注桩复打法的施工要求可按本规范第6.5.4条和第6.5.5条执行。 


亚博体育彩票   Ⅲ内夯沉管灌注桩施工


   6.5.11 当采用外管与内夯管结合锤击沉管进行夯压、扩底、扩径时,内夯管应比外管短100mm,内夯管底端可采用闭口平底或闭口锥底(见图6.5.11)。

 

6.5.14 桩身混凝土宜分段灌注;拔管时内夯管和桩锤应施压于外管中的混凝土顶面,边压边拔。

6.5.15 施工前宜进行试成桩,并应详细记录混凝土的分次灌注量、外管上拔高度、内管夯击次数、双管同步沉入深度,并应检查外管的封底情况,有无进水、涌泥等,经核定后可作为施工控制依据。


6.6 干作业成孔灌注桩


▼ 展开条文说明


Ⅰ钻孔(扩底)灌注桩施工


亚博体育彩票   6.6.1 钻孔时应符合下列规定:

    1 ZUANGANYINGBAOCHICHUIZHIWENGU,WEIZHIZHUNQUE,FANGZHIYINZUANGANHUANGDONGYINQIKUODAKONGJING;

    2 ZUANJINSUDUYINGGENJUDIANLIUZHIBIANHUA,JISHIDIAOZHENG;

    3 ZUANJINGUOCHENGZHONG,YINGSUISHIQINGLIKONGKOUJITU,YUDAODIXIASHUI、TAKONG、SUOKONGDENGYICHANGQINGKUANGSHI,YINGJISHICHULI。

6.6.2 ZUANKONGKUODIZHUANGSHIGONG,ZHIKONGBUFENYINGANBENGUIFANDI6.6.1、6.6.3、6.6.4TIAOGUIDINGZHIXING,KUODIBUWEISHANGYINGFUHEXIALIEGUIDING:

    1 YINGGENJUDIANLIUZHIHUOYOUYAZHI,DIAOJIEKUOKONGDAOPIANXUETULIANG,FANGZHICHUXIANCHAOFUHEXIANXIANG;

    2 KUODIZHIJINGHEKONGDIDEXUTUHOUDUYINGFUHESHEJIYAOQIU。

6.6.3 CHENGKONGDADAOSHEJISHENDUHOU,KONGKOUYINGYUBAOHU,YINGANBENGUIFANDI6.2.4TIAOGUIDINGYANSHOU,BINGYINGZUOHAOJILU。

6.6.4 GUANZHUHUNNINGTUQIAN,YINGZAIKONGKOUANFANGHUKONGLOUDOU,RANHOUFANGZHIGANGJINLONG,BINGYINGZAICICELIANGKONGNEIXUTUHOUDU。KUODIZHUANGGUANZHUHUNNINGTUSHI,DIYICIYINGGUANDAOKUODIBUWEIDEDINGMIAN,SUIJIZHENDAOMISHI;JIAOZHUZHUANGDINGYIXIA5mFANWEINEIHUNNINGTUSHI,YINGSUIJIAOZHUSUIZHENDAO,MEICIJIAOZHUGAODUBUDEDAYU1.5m。


亚博体育彩票   Ⅱ人工挖孔灌注桩施工


   6.6.5 人工挖孔桩的孔径(不含护壁)不得小于0.8m,且不宜大于2.5m;孔深不宜大于30m。当桩净距小于2.5m时,应采用间隔开挖。相邻排桩跳挖的最小施工净距不得小于4.5m。

亚博体育彩票6.6.6 RENGONGWAKONGZHUANGHUNNINGTUHUBIDEHOUDUBUYINGXIAOYU100mm,HUNNINGTUQIANGDUDENGJIBUYINGDIYUZHUANGSHENHUNNINGTUQIANGDUDENGJI,BINGYINGZHENDAOMISHI;HUBIYINGPEIZHIZHIJINGBUXIAOYU8mmDEGOUZAOGANGJIN,SHUXIANGJINYINGSHANGXIADAJIEHUOLAJIE。

6.6.7 RENGONGWAKONGZHUANGSHIGONGYINGCAIQUXIALIEANQUANCUOSHI:

    1 KONGNEIBIXUSHEZHIYINGJIRUANPATIGONGRENYUANSHANGXIA;SHIYONGDEDIANHULU、DIAOLONGDENGYINGANQUANKEKAO,BINGPEIYOUZIDONGKAJINBAOXIANZHUANGZHI,BUDESHIYONGMASHENGHENILONGSHENGDIAOGUAHUOJIAOTAJINGBITUYUANSHANGXIA;DIANHULUYIYONGANNIUSHIKAIGUAN,SHIYONGQIANBIXUJIANYANQIANQUANQIDIAONENGLI;

    2 MEIRIKAIGONGQIANBIXUJIANCEJINGXIADEYOUDU、YOUHAIQITI,BINGYINGYOUXIANGYINGDEANQUANFANGFANCUOSHI;DANGZHUANGKONGKAIWASHENDUCHAOGUO10mSHI.YINGYOUZHUANMENXIANGBINGXIASONGFENGDESHEBEI,FENGLIANGBUYISHAOYU25L/s;

    3 KONGKOUSIZHOUBIXUSHEZHIHULAN,HULANGAODUYIWEI0.8m;

    4 WACHUDETUSHIFANGYINGJISHIYUNLIKONGKOU,BUDEDUIFANGZAIKONGKOUZHOUBIAN1mFANWEINEI,JIDONGCHELIANGDETONGXINGBUDEDUIJINGBIDEANQUANZAOCHENGYINGXIANG;

    5 SHIGONGXIANCHANGDEYIQIEDIANYUAN、DIANLUDEANZHUANGHECHAICHUBIXUZUNSHOUXIANXINGXINGYEBIAOZHUN《SHIGONGXIANCHANGLINSHIYONGDIANANQUANJISHUGUIFAN》JGJ 46DEGUIDING。

6.6.8 KAIKONGQIAN,ZHUANGWEIYINGZHUNQUEDINGWEIFANGYANG,ZAIZHUANGWEIWAISHEZHIDINGWEIJIZHUNZHUANG,ANZHUANGHUBIMOBANBIXUYONGZHUANGZHONGXINDIANXIAOZHENGMOBANWEIZHI,BINGYINGYOUZHUANRENFUZE。

亚博体育彩票6.6.9 DIYIJIEJINGQUANHUBIYINGFUHEXIALIEGUIDING:

    1 JINGQUANZHONGXINXIANYUSHEJIZHOUXIANDEPIANCHABUDEDAYU20mm;

    2 JINGQUANDINGMIANYINGBICHANGDIGAOCHU100~150mm,BIHOUYINGBIXIAMIANJINGBIHOUDUZENGJIA100~150mm。

亚博体育彩票6.6.10 XIUZHUJINGQUANHUBIYINGFUHEXIALIEGUIDING:

亚博体育彩票    1 HUBIDEHOUDU、LAJIEGANGJIN、PEIJIN、HUNNINGTUQIANGDUDENGJIJUNYINGFUHESHEJIYAOQIU;

亚博体育彩票    2 SHANGXIAJIEHUBIDEDAJIEZHANGDUBUDEXIAOYU50mm;

    3 MEIJIEHUBIJUNYINGZAIDANGRILIANXUSHIGONGWANBI;

亚博体育彩票    4 HUBIHUNNINGTUBIXUBAOZHENGZHENDAOMISHI,YINGGENJUTUCENGSHENSHUIQINGKUANGSHIYONGSUNINGJI;

亚博体育彩票    5 HUBIMOBANDECHAICHUYINGZAIGUANZHUHUNNINGTU24hZHIHOU;

    6 FAXIANHUBIYOUFENGWO、LOUSHUIXIANXIANGSHI,YINGJISHIBUQIANG;

    7 TONGYISHUIPINGMIANSHANGDEJINGQUANRENYIZHIJINGDEJICHABUDEDAYU50mm。

亚博体育彩票6.6.11 DANGYUYOUJUBUHUOHOUDUBUDAYU1.5mDELIUDONGXINGYUNIHEKENENGCHUXIANYONGTUYONGSHASHI,HUBISHIGONGKEANXIALIEFANGFACHULI:

    1 JIANGMEIJIEHUBIDEGAODUJIANXIAODAO300~500mm,BINGSUIWA、SUIYAN、SUIGUANZHUHUNNINGTU;

    2 CAIYONGGANGHUTONGHUOYOUXIAODEJIANGSHUICUOSHI。

亚博体育彩票6.6.12 WAZHISHEJIBIAOGAOHOU,YINGQINGCHUHUBISHANGDENITUHEKONGDICANZHA、JISHUI,BINGYINGJINXINGYINBIGONGCHENGYANSHOU。YANSHOUHEGEHOU,YINGLIJIFENGDIHEGUANZHUZHUANGSHENHUNNINGTU。

6.6.13 GUANZHUZHUANGSHENHUNNINGTUSHI,HUNNINGTUBIXUTONGGUOLIUCAO;DANGLUOJUCHAOGUO3mSHI,YINGCAIYONGCHUANTONG,CHUANTONGMODUANJUKONGDIGAODUBUYIDAYU2m;YEKECAIYONGDAOGUANBENGSONG;HUNNINGTUYICAIYONGCHARUSHIZHENDAOQIZHENSHI。

6.6.14 DANGSHENSHUILIANGGUODASHI,YINGCAIQUCHANGDIJIESHUI、JIANGSHUIHUOSHUIXIAGUANZHUHUNNINGTUDENGYOUXIAOCUOSHI。YANJINZAIZHUANGKONGZHONGBIANCHOUSHUIBIANKAIWA,TONGSHIBUDEGUANZHUXIANGLINZHUANG。


6.7 灌注桩后注浆


▼ 展开条文说明


6.7.1 灌注桩后注浆工法可用于各类钻、挖、冲孔灌注桩及地下连续墙的沉渣(虚土)、泥皮和桩底、桩侧一定范围土体的加固。
▼ 展开条文说明

6.7.2 后注浆装置的设置应符合下列规定:

    1 HOUZHUJIANGDAOGUANYINGCAIYONGGANGGUAN,QIEYINGYUGANGJINLONGJIAJINGJINBANGZHAGUDINGHUOHANJIE;

    2 ZHUANGDUANHOUZHUJIANGDAOGUANJIZHUJIANGFASHULIANGYIGENJUZHUANGJINGDAXIAOSHEZHI,DUIYUZHIJINGBUDAYU1200mmDEZHUANG,YIYANGANGJINLONGYUANZHOUDUICHENGSHEZHI2GEN;DUIYUZHIJINGDAYU1200mmERBUDAYU2500mmDEZHUANG,YIDUICHENGSHEZHI3GEN;

亚博体育彩票    3 DUIYUZHUANGZHANGCHAOGUO15mQIECHENGZAILIZENGFUYAOQIUJIAOGAOZHE,YICAIYONGZHUANGDUANZHUANGCEFUSHIZHUJIANG;ZHUANGCEHOUZHUJIANGGUANFASHEZHISHULIANGYINGZONGHEDICENGQINGKUANG、ZHUANGZHANGHECHENGZAILIZENGFUYAOQIUDENGYINSUQUEDING,KEZAILIZHUANGDI5~15mYISHANG、ZHUANGDING8mYIXIA,MEIGE6~12mSHEZHIYIDAOZHUANGCEZHUJIANGFA,DANGYOUCULITUSHI,YIJIANGZHUJIANGFASHEZHIYUCULITUCENGXIABU,DUIYUGANZUOYECHENGKONGGUANZHUZHUANGYISHEYUCULITUCENGZHONGBU;

    4 DUIYUFEITONGZHANGPEIJINZHUANG,XIABUYINGYOUBUSHAOYU2GENYUZHUJIANGGUANDENGZHANGDEZHUJINZUCHENGDEGANGJINLONGTONGDI;

    5 钢筋笼应沉放到底,不得悬吊,下笼受阻时不得撞笼、墩笼、扭笼。
▼ 展开条文说明

6.7.3 后注浆阀应具备下列性能:

亚博体育彩票    1 ZHUJIANGFAYINGNENGCHENGSHOU1MPaYISHANGJINGSHUIYALI;ZHUJIANGFAWAIBUBAOHUCENGYINGNENGDIKANGSHASHIDENGYINGZHIWUDEGUAZHUANGERBUZHISHIZHUJIANGFASHOUSUN;

亚博体育彩票    2 ZHUJIANGFAYINGJUBEINIZHIGONGNENG。

6.7.4 浆液配比、终止注浆压力、流量、注浆量等参数设计应符合下列规定:

    1 JIANGYEDESHUIHUIBIYINGGENJUTUDEBAOHEDU、SHENTOUXINGQUEDING,DUIYUBAOHETU,SHUIHUIBIYIWEI0.45~0.65;DUIYUFEIBAOHETU,SHUIHUIBIYIWEI0.7~0.9(SONGSANSUISHITU、SHALIYIWEI0.5~0.6);DISHUIHUIBIJIANGYEYICHANRUJIANSHUIJI;

    2 ZHUANGDUANZHUJIANGZHONGZHIZHUJIANGYALIYINGGENJUTUCENGXINGZHIJIZHUJIANGDIANSHENDUQUEDING,DUIYUFENGHUAYAN、FEIBAOHENIANXINGTUJIFENTU,ZHUJIANGYALIYIWEI3~10MPa;DUIYUBAOHETUCENGZHUJIANGYALIYIWEI1.2~4MPa,RUANTUYIQUDIZHI,MISHINIANXINGTUYIQUGAOZHI;

亚博体育彩票    3 ZHUJIANGLIULIANGBUYICHAOGUO75L/min;

    4 DANZHUANGZHUJIANGLIANGDESHEJIYINGGENJUZHUANGJING、ZHUANGZHANG、ZHUANGDUANZHUANGCETUCENGXINGZHI、DANZHUANGCHENGZAILIZENGFUJISHIFOUFUSHIZHUJIANGDENGYINSUQUEDING,KEANXIASHIGUSUAN:



    DUIDULIDANZHUANG、ZHUANGJUDAYU6dDEQUNZHUANGHEQUNZHUANGCHUSHIZHUJIANGDESHUGENJIZHUANGDEZHUJIANGLIANGYINGANSHANGSHUGUSUANZHICHENGYI1.2DEXISHU;

    5 HOUZHUJIANGZUOYEKAISHIQIAN,YIJINXINGZHUJIANGSHIYAN,YOUHUABINGZUIZHONGQUEDINGZHUJIANGCANSHU。

6.7.5 后注浆作业起始时间、顺序和速率应符合下列规定:

    1 ZHUJIANGZUOYEYIYUCHENGZHUANG2dHOUKAISHI;BUYICHIYUCHENGZHUANG30dHOU;

亚博体育彩票    2 ZHUJIANGZUOYEYUCHENGKONGZUOYEDIANDEJULIBUYIXIAOYU8~10m;

亚博体育彩票    3 DUIYUBAOHETUZHONGDEFUSHIZHUJIANGSHUNXUYIXIANZHUANGCEHOUZHUANGDUAN;DUIYUFEIBAOHETUYIXIANZHUANGDUANHOUZHUANGCE;DUODUANMIANZHUANGCEZHUJIANGYINGXIANSHANGHOUXIA;ZHUANGCEZHUANGDUANZHUJIANGJIANGESHIJIANBUYISHAOYU2h;

亚博体育彩票    4 ZHUANGQIANGZHUJIANGYINGDUITONGYIGENZHUANGDEGEZHUJIANGDAOGUANYICISHISHIDENGLIANGZHUJIANG;

    5 对于桩群注浆宜先外围、后内部。
▼ 展开条文说明

6.7.6 当满足下列条件之一时可终止注浆:

亚博体育彩票    1 ZHUJIANGZONGLIANGHEZHUJIANGYALIJUNDADAOSHEJIYAOQIU;

    2 ZHUJIANGZONGLIANGYIDADAOSHEJIZHIDE75%,QIEZHUJIANGYALICHAOGUOSHEJIZHI。

6.7.7 当注浆压力长时间低于正常值或地面出现冒浆或周围桩孔串浆,应改为间歇注浆,间歇时间宜为30~60min,或调低浆液水灰比。

6.7.8 后注浆施工过程中,应经常对后注浆的各项工艺参数进行检查。发现异常应采取相应处理措施。当注浆量等主要参数达不到设计值时,应跟据工程具体情况采取相应措施。

6.7.9 后注浆桩基工程质量检查和验收应符合下列要求;

    1 HOUZHUJIANGSHIGONGWANCHENGHOUYINGTIGONGSHUINICAIZHIJIANYANBAOGAO、YALIBIAOJIANDINGZHENGSHU、SHIZHUJIANGJILU、SHEJIGONGYICANSHU、HOUZHUJIANGZUOYEJILU、TESHUQINGKUANGCHULIJILUDENGZILIAO;

    2 在桩身混凝土强度达到设计要求的条件下,承载力检验应在注浆完成20d后进行,浆液中掺入早强剂时可于注浆完成15d后进行。
▼ 展开条文说明


7混凝土预制桩与钢桩施工

7.1 混凝土预制桩的制作

7.1.1 HUNNINGTUYUZHIZHUANGKEZAISHIGONGXIANCHANGYUZHI,YUZHICHANGDIBIXUPINGZHENG、JIANSHI。

7.1.2 制桩模板宜采用钢模板,模板应具有足够刚度,并应平整,尺寸应准确。

7.1.3 钢筋骨架的主筋连接宜采用对焊和电弧焊,当钢筋直径不小于20mm时,宜采用机械接头连接。主筋接头配置在同一截面内的数量,应符合下列规定:

    1 DANGCAIYONGDUIHANHUODIANHUHANSHI,DUIYUSHOULAGANGJIN,BUDECHAOGUO50%;

    2 XIANGLINLIANGGENZHUJINJIETOUJIEMIANDEJULIYINGDAYU35dg(dgWEIZHUJINZHIJING),BINGBUYINGXIAOYU500mm;

    3 必须符合现行行业标准《钢筋焊接及验收规程》JGJ 18和《钢筋机械连接通用技术规程》JGJ 107的规定。
▼ 展开条文说明

7.1.4 预制桩钢筋骨架的允许偏差应符合表7.1.4的规定。


▼ 展开条文说明

7.1.5 确定桩的单节长度时应符合下列规定:

亚博体育彩票    1 MANZUZHUANGJIADEYOUXIAOGAODU、ZHIZUOCHANGDITIAOJIAN、YUNSHUYUZHUANGXIENENGLI,

    2 避免在桩尖接近或处于硬持力层中时接桩。
▼ 展开条文说明

7.1.6 浇注混凝土预制桩时,宜从桩顶开始灌筑,并应防止另一端的砂浆积聚过多。

7.1.7 锤击预制桩的骨料粒径宜为5~40mm。

7.1.8 锤击预制桩,应在强度与龄期均达到要求后,方可锤击。
▼ 展开条文说明

7.1.9 重叠法制作预制桩时,应符合下列规定:

    1 ZHUANGYULINZHUANGJIDIMOZHIJIANDEJIECHUMIANBUDEZHANLIAN;

    2 SHANGCENGZHUANGHUOLINZHUANGDEJIAOZHU,BIXUZAIXIACENGZHUANGHUOLINZHUANGDEHUNNINGTUDADAOSHEJIQIANGDUDE30%YISHANGSHI,FANGKEJINXING;

    3 ZHUANGDEZHONGDIECENGSHUBUYINGCHAOGUO4CENG。

7.1.10 混凝土预制桩的表面应平整、密实,制作允许偏差应符合表7.1.10的规定。

7.1.11 本规范未作规定的预应力混凝土桩的其他要求及离心混凝土强度等级评定方法,应符合国家现行标准《先张法预应力混凝土管桩》GB 13476和《预应力混凝土空心方桩》JG 197的规定。


7.2 混凝土预制桩的起吊、运输和堆放

7.2.1 HUNNINGTUSHIXINZHUANGDEDIAOYUNYINGFUHEXIALIEGUIDING;

亚博体育彩票    1 HUNNINGTUSHEJIQIANGDUDADAO70%JIYISHANGFANGKEQIDIAO,DADAO100%FANGKEYUNSHU;

    2 ZHUANGQIDIAOSHIYINGCAIQUXIANGYINGCUOSHI,BAOZHENGANQUANPINGWEN,BAOHUZHUANGSHENZHILIANG;

亚博体育彩票    3 SHUIPINGYUNSHUSHI,YINGZUODAOZHUANGSHENPINGWENFANGZHI,YANJINZAICHANGDISHANGZHIJIETUOLAZHUANGTI。

7.2.2 预应力混凝土空心桩的吊运应符合下列规定:

    1 CHUCHANGQIANYINGZUOCHUCHANGJIANCHA,QIGUIGE、PIHAO、ZHIZUORIQIYINGFUHESUOSHUDEYANSHOUPIHAONEIRONG;

亚博体育彩票    2 ZAIDIAOYUNGUOCHENGZHONGYINGQINGDIAOQINGFANG,BIMIANJULIEPENGZHUANG;

亚博体育彩票    3 DANJIEZHUANGKECAIYONGZHUANYONGDIAOGOUGOUZHUZHUANGLIANGDUANNEIBIZHIJIEJINXINGSHUIPINGQIDIAO;

亚博体育彩票    4 YUNZHISHIGONGXIANCHANGSHIYINGJINXINGJIANCHAYANSHOU,YANJINSHIYONGZHILIANGBUHEGEJIZAIDIAOYUNGUOCHENGZHONGCHANSHENGLIEFENGDEZHUANG。

7.2.3 顼应力混凝土空心桩的堆放应符合下列规定: 

    1 DUIFANGCHANGDIYINGPINGZHENGJIANSHI,ZUIXIACENGYUDIMIANJIECHUDEDIANMUYINGYOUZUGOUDEKUANDUHEGAODU。DUIFANGSHIZHUANGYINGWENGU,BUDEGUNDONG;

    2 YINGANBUTONGGUIGE、ZHANGDUJISHIGONGLIUSHUISHUNXUFENBIEDUIFANG;

    3 DANGCHANGDITIAOJIANXUKESHI,YIDANCENGDUIFANG;DANGDIECENGDUIFANGSHI,WAIJINGWEI500~600mmDEZHUANGBUYICHAOGUO4CENG,WAIJINGWEI300~400mmDEZHUANGBUYICHAOGUO5CENG;

亚博体育彩票    4 DIECENGDUIFANGZHUANGSHI,YINGZAICHUIZHIYUZHUANGZHANGDUFANGXIANGDEDIMIANSHANGSHEZHI2DAODIANMU,DIANMUYINGFENBIEWEIYUJUZHUANGDUAN1/5ZHUANGZHANGCHU;DICENGZUIWAIYUANDEZHUANGYINGZAIDIANMUCHUYONGMUXIESAIJIN;

    5 DIANMUYIXUANYONGNAIYADEZHANGMUFANGHUOZHENMU,BUDESHIYONGYOULENGJIAODEJINSHUGOUJIAN。

7.2.4 取桩应符合下列规定:

    1 DANGZHUANGDIECENGDUIFANGCHAOGUO2CENGSHI,YINGCAIYONGDIAOJIQUZHUANG,YANJINTUOLAQUZHUANG;

    2 SANDIANZHICHENGZIXINGSHIDAZHUANGJIBUYINGTUOLAQUZHUANG。 


7.3 混凝土预制桩的接桩


▼ 展开条文说明

亚博体育彩票7.3.1 ZHUANGDELIANJIEKECAIYONGHANJIE、FALANLIANJIEHUOJIXIEKUAISULIANJIE(LUOWENSHI、NIEHESHI)。

7.3.2 接桩材料应符合下列规定:

    1 HANJIEJIEZHUANG:GANGBANYICAIYONGDITANGANG,HANTIAOYICAIYONGE43;BINGYINGFUHEXIANXINGXINGYEBIAOZHUN《JIANZHUGANGJIEGOUHANJIEJISHUGUICHENG》JGJ 81YAOQIU。

亚博体育彩票    2 FALANJIEZHUANG:GANGBANHELUOSHUANYICAIYONGDITANGANG。

7.3.3 采用焊接接桩除应符合现行行业标准《建筑钢结构焊接技术规程》JGJ 81的有关规定外,尚应符合下列规定:

    1 XIAJIEZHUANGDUANDEZHUANGTOUYIGAOCHUDIMIAN0.5m;  

    2 XIAJIEZHUANGDEZHUANGTOUCHUYISHEDAOXIANGGU;JIEZHUANGSHISHANGXIAJIEZHUANGDUANYINGBAOCHISHUNZHI,CUOWEIPIANCHABUYIDAYU2mm;JIEZHUANGJIUWEIJIUPIANSHI,BUDECAIYONGDACHUIHENGXIANGQIAODA;

    3 ZHUANGDUIJIEQIAN,SHANGXIADUANBANBIAOMIANYINGCAIYONGTIESHUAZIQINGSHUAGANJING,POKOUCHUYINGSHUAZHILUCHUJINSHUGUANGZE;

    4 HANJIEYIZAIZHUANGSIZHOUDUICHENGDIJINXING,DAISHANGXIAZHUANGJIEGUDINGHOUCHAICHUDAOXIANGGUZAIFENCENGSHIHAN;HANJIECENGSHUBUDESHAOYU2CENG,DIYICENGHANWANHOUBIXUBAHANZHAQINGLIXIAJING,FANGKEJINXINGDIERCENG(DE)SHIHAN,HANFENGYINGLIANXU、BAOMAN;

    5 HANHAOHOUDEZHUANGJIETOUYINGZIRANLENGQUEHOUFANGKEJIXUCHUIJI,ZIRANLENGQUESHIJIANBUYISHAOYU8min;YANJINCAIYONGSHUILENGQUEHUOHANHAOJISHIDA;

亚博体育彩票    6 YUTIANHANJIESHI,YINGCAIQUKEKAODEFANGYUCUOSHI;

    7 HANJIEJIETOUDEZHILIANGJIANCHAYICAIYONGTANSHANGJIANCE,TONGYIGONGCHENGTANSHANGCHOUYANGJIANYANBUDESHAOYU3GEJIETOU。

7.3.4 采用机械快速螺纹接桩的操作与质量应符合下列规定:

    1 JIEZHUANGQIANYINGJIANCHAZHUANGLIANGDUANZHIZUODECHICUNPIANCHAJILIANJIEJIAN,WUSHOUSUNHOUFANGKEQIDIAOSHIGONG,QIXIAJIEZHUANGDUANYIGAOCHUDIMIAN0.8m;

亚博体育彩票    2 JIEZHUANGSHI,XIEXIASHANGXIAJIEZHUANGLIANGDUANDEBAOHUZHUANGZHIHOU,YINGQINGLIJIETOUCANWU,TUSHANGRUNHUAZHI;

    3 YINGCAIYONGZHUANYONGJIETOUZHUIDUDUIZHONG,DUIZHUNSHANGXIAJIEZHUANGJINXINGXUANJINLIANJIE;

    4 KECAIYONGZHUANYONGLIANTIAOSHIBANSHOUJINXINGXUANJIN,(BEIZHANG1m,KAJINHOURENGONGXUANJINZAIYONGTIECHUIQIAOJIBANBEI,)SUOJINHOULIANGDUANBANSHANGYINGYOU1~2mmDEJIANXI。

7.3.5 采用机械啮合接头接桩的操作与质量应符合下列规定:

    1 JIANGSHANGXIAJIETOUBANQINGLIGANJING,YONGBANSHOUJIANGYITUMOLIQINGTULIAODELIANJIEXIAOZHUGENXUANRUSHANGJIEZHUANGⅠXINGDUANTOUBANDELUOSHUANKONGNEI,BINGYONGGANGMOBANDIAOZHENGHAOLIANJIEXIAODEFANGWEI;

    2 TICHUXIAJIEZHUANGⅡXINGDUANTOUBANLIANJIECAONEIPAOMOSULIAOBAOHUKUAI,ZAILIANJIECAONEIZHURULIQINGTULIAO,BINGZAIDUANTOUBANMIANZHOUBIANMOSHANGKUANDU20mm、HOUDU3mmDELIQINGTULIAO;DANGDIJITU、DIXIASHUIHANZHONGDENGYISHANGFUSHIJIEZHISHI,ZHUANGDUANBANBANMIANYINGMANTULIQINGTULIAO;

亚博体育彩票    3 JIANGSHANGJIEZHUANGDIAOQI,SHILIANJIEXIAOYUⅡXINGDUANTOUBANSHANGGELIANJIEKOUDUIZHUN,SUIJIJIANGLIANJIEXIAOCHARULIANJIECAONEI;

亚博体育彩票    4 JIAYASHISHANGXIAJIEZHUANGDEZHUANGTOUBANJIECHU,WANCHENGJIEZHUANG。


7.4 锤击沉桩

7.4.1 CHENZHUANGQIANBIXUCHULIKONGZHONGHEDIXIAZHANGAIWU,CHANGDIYINGPINGZHENG,PAISHUIYINGCHANGTONG,BINGYINGMANZUDAZHUANGSUOXUDEDIMIANCHENGZAILI。

7.4.2 桩锤的选用应根据地质条件、桩型、桩的密集程度、单桩竖向承载力及现有施工条件等因素确定,也可按本规范附录H选用。

7.4.3 桩打入时应符合下列规定:

亚博体育彩票    1 ZHUANGMAOHUOSONGZHUANGMAOYUZHUANGZHOUWEIDEJIANXIYINGWEI5~10mm;

亚博体育彩票    2 CHUIYUZHUANGMAO、ZHUANGMAOYUZHUANGZHIJIANYINGJIASHEYINGMU、MADAI、CAODIANDENGDANXINGCHENDIAN;

亚博体育彩票    3 ZHUANGCHUI、ZHUANGMAOHUOSONGZHUANGMAOYINGHEZHUANGSHENZAITONGYIZHONGXINXIANSHANG;

    4 桩插入时的垂直度偏差不得超过0.5%。
▼ 展开条文说明

7.4.4 打桩顺序要求应符合下列规定:

亚博体育彩票    1 DUIYUMIJIZHUANGQUN,ZIZHONGJIANXIANGLIANGGEFANGXIANGHUOSIZHOUDUICHENGSHIDA;

亚博体育彩票    2 DANGYICEPILINJIANZHUWUSHI,YOUPILINJIANZHUWUCHUXIANGLINGYIFANGXIANGSHIDA;

    3 GENJUJICHUDESHEJIBIAOGAO,YIXIANSHENHOUQIAN;

    4 根据桩的规格,宜先大后小,先长后短。
▼ 展开条文说明

7.4.5 打入桩(预制混凝土方桩、预应力混凝土空心桩、钢桩)的桩位偏差,应符合表7.4.5的规定。斜桩倾斜度的偏差不得大于倾斜角正切值的15%(倾斜角系桩的纵向中心线与铅垂线间夹角)。

7.4.6 桩终止锤击的控制应符合下列规定:

亚博体育彩票    1 DANGZHUANGDUANWEIYUYIBANTUCENGSHI,YINGYIKONGZHIZHUANGDUANSHEJIBIAOGAOWEIZHU,GUANRUDUWEIFU;

    2 ZHUANGDUANDADAOJIANYING、YINGSUDENIANXINGTU、ZHONGMIYISHANGFENTU、SHATU、SUISHILEITUJIFENGHUAYANSHI,YINGYIGUANRUDUKONGZHIWEIZHU,ZHUANGDUANBIAOGAOWEIFU;

    3 贯入度已达到设计要求而桩端标高未达到时,应继续锤击3阵,并按每阵10击的贯入度不应大于设计规定的数值确认,必要时,施工控制贯入度应通过试验确定。
▼ 展开条文说明

7.4.7 当遇到贯入度剧变,桩身突然发生倾斜、位移或有严重回弹、桩顶或桩身出现严重裂缝、破碎等情况时,应暂停打桩,并分析原因,采取相应措施。

7.4.8 当采用射水法沉桩时,应符合下列规定:

    1 SHESHUIFACHENZHUANGYIYONGYUSHATUHESUISHITU;

亚博体育彩票    2 CHENZHUANGZHIZUIHOU1~2mSHI,YINGTINGZHISHESHUI,BINGCAIYONGCHUIJIZHIGUIDINGBIAOGAO,ZHONGCHUIKONGZHIBIAOZHUNKEANBENGUIFANDI7.4.6TIAOYOUGUANGUIDINGZHIXING。

7.4.9 施打大面积密集桩群时,应采取下列辅助措施:

亚博体育彩票    1 DUIYUZUANKONGCHENZHUANG,YUZUANKONGKONGJINGKEBIZHUANGJING(HUOYUNZHUANGDUIJIAOXIAN)XIAO50~100mm,SHENDUKEGENJUZHUANGJUHETUDEMISHIDU、SHENTOUXINGQUEDING,YIWEIZHUANGZHANGDE1/3~1/2;SHIGONGSHIYINGSUIZUANSUIDA;ZHUANGJIAYIJUBEIZUANKONGCHUIJISHUANGZHONGXINGNENG;

亚博体育彩票    2 DUIBAOHENIANXINGSHANGDIJI,YINGSHEZHIDAIZHUANGSHAJINGHUOSULIAOPAISHUIBAN;DAIZHUANGSHAJINGZHIJINGYIWEI70~80mm,JIANJUYIWEI1.0~1.5m,SHENDUYIWEI10~12m;SULIAOPAISHUIBANDESHENDU、JIANJUYUDAIZHUANGSHAJINGXIANGTONG;

    3 YINGSHEZHIGELIBANZHUANGHUODIXIALIANXUQIANG;

亚博体育彩票    4 KEKAIWADIMIANFANGZHENGOU,BINGKEYUQITACUOSHIJIEHESHIYONG,FANGZHENGOUGOUKUANKEQU0.5~0.8m,SHENDUANTUZHIQINGKUANGJUEDING:

亚博体育彩票    5 YINGKONGZHIDAZHUANGSULVHERIDAZHUANGLIANG,24XIAOSHINEIXIUZHISHIJIANBUYINGSHAOYU8h; 

    6 CHENZHUANGJIESHUHOU,YIPUBIANSHISHIYICIFUDA;

    7 YINGDUIBUSHAOYUZONGZHUANGSHU10%DEZHUANGDINGSHANGYONGHESHUIPINGWEIYIJINXINGJIANCE;

    8 沉桩过程中应加强邻近建筑物、地下管线等的观测、监护。
▼ 展开条文说明

7.4.10 预应力混凝土管桩的总锤击数及最后1.0m沉桩锤击数应根据桩身强度和当地工程经验确定。

7.4.11 锤击沉桩送桩应符合下列规定:

    1 SONGZHUANGSHENDUBUYIDAYU2.0m;

    2 DANGZHUANGDINGDAZHIJIEJINDIMIANXUYAOSONGZHUANGSHI,YINGCECHUZHUANGDECHUIZHIDUBINGJIANCHAZHUANGDINGZHILIANG,HEGEHOUYINGJISHISONGZHUANG;

亚博体育彩票    3 SONGZHUANGDEZUIHOUGUANRUDUYINGCANKAOXIANGTONGTIAOJIANXIABUSONGZHUANGSHIDEYUANHOUGUANRUDUBINGXIUZHENG;

    4 SONGZHUANGHOUYILIUDEZHUANGKONGYINGLIJIHUITIANHUOFUGAI;

亚博体育彩票    5 DANGSONGZHUANGSHENDUCHAOGUO2.0mQIEBUDAYU6.0mSHI,DAZHUANGJIYINGWEISANDIANZHICHENGLVDAIZIXINGSHIHUOBULVSHICHAIYOUDAZHUANGJI;ZHUANGMAOHEZHUANGCHUIZHIJIANYINGYONGSHUWENYINGMUHUOPANSICENGDIEDEGANGSISHENGZUO“CHUIDIAN”,QIHOUDUYIQU150~200mm。

7.4.12 送桩器及衬垫设置应符合下列规定:

    1 SONGZHUANGQIYIZUOCHENGYUANTONGXING,BINGYINGYOUZUGOUDEQIANGDU、GANGDUHENAIDAXING。SONGZHUANGQIZHANGDUYINGMANZUSONGZHUANGSHENDUDEYAOQIU,WANQUDUBUDEDAYU1/1000;

    2 SONGZHUANGQISHANGXIALIANGDUANMIANYINGPINGZHENG,QIEYUSONGZHUANGQIZHONGXINZHOUXIANXIANGCHUIZHI;

    3 SONGZHUANGQIXIADUANMIANYINGKAIKONG,SHIKONGXINZHUANGNEIQIANGYUWAIJIELIANTONG;

亚博体育彩票    4 SONGZHUANGQIYINGYUZHUANGPIPEI;TAOTONGSHISONGZHUANGQIXIADUANDETAOTONGSHENDUYIQU250~350mm,TAOGUANNEIJINGYINGBIZHUANGWAIJINGDA20~30mm;CHAXIAOSHISONGZHUANGQIXIADUANDECHAXIAOZHANGDUYIQU200~300mm,GANXIAOWAIJINGYINGBI(GUAN)ZHUANGNEIJINGXIAO20~30mm,DUIYUQIANGNEICUNYOUYUJIANGDEGUANZHUANG,BUYICAIYONGCHAXIAOSHISONGZHUANGQI;

亚博体育彩票    5 SONGZHUANGZUOYESHI,SONGZHUANGQIYUZHUANGTOUZHIJIANYINGSHEZHI1~2CENGMADAIHUOYINGZHIBANDENGCHENDIAN。NEITIANDANXINGCHENDIANYASHIHOUDEHOUDUBUYIXIAOYU60mm。

7.4.13 施工现场应配备桩身垂直度观测仪器(长条水准尺或经纬仪)和观测人员,随时量测桩身的垂直度。


7.5 静压沉桩

7.5.1 CAIYONGJINGYACHENZHUANGSHI,CHANGDIDIJICHENGZAILIBUYINGXIAOYUYAZHUANGJIJIEDIYAQIANGDE1.2BEI,QIECHANGDIYINGPINGZHENG。

7.5.2 静力压桩宜选择液压式和绳索式压桩工艺;宜根据单节桩的长度选用便压式液压压桩机和抱压式液压压桩机。

7.5.3 选择压桩机的参数应包括下列内容:

亚博体育彩票    1 YAZHUANGJIXINGHAO、ZHUANGJIZHILIANG(BUHANPEIZHONG)、ZUIDAYAZHUANGLIDENG;

    2 YAZHUANGJIDEWAIXINGCHICUNJITUOYUNCHICUN;

亚博体育彩票    3 YAZHUANGJIDEZUIXIAOBIANZHUANGJUJIZUIDAYAZHUANGLI;

    4 ZHANG、DUANCHUANXINGLVXUEDEJIEDIYAQIANG;

    5 JIACHIJIGOUDEXINGSHI;

亚博体育彩票    6 YEYAYOUGANGDESHULIANG、ZHIJING,LVDINGHOUDEYALIBIAODUSHUYUYAZHUANGLIDEDUIYINGGUANXI;

亚博体育彩票    7 DIAOZHUANGJIGOUDEXINGNENGJIDIAOZHUANGNENGLI。

7.5.4 压桩机的每件配重必须用量具核实,并将其质量标记在该件配重的外露表面;液压式压桩机的最大压桩力应取压桩机的机架重量和配重之和乘以0.9。

7.5.5 当边桩空位不能满足中置式压桩机施压条件时,宜利用压边桩机构或选用前置式液压压桩机进行压桩,但此时应估计最大压桩能力减少造成的影响。

7.5.6 当设计要求或施工需要采用引孔法压桩时,应配备螺旋钻孔机,或在压桩机上配备专用的螺旋钻。当桩端需进入较坚硬的岩层时,应配备可入岩的钻孔桩机或冲孔桩机。

7.5.7 最大压桩力不宜小于设计的单桩竖向极限承载力标准值,必要时可由现场试验确定。

7.5.8 静力压桩施工的质量控制应符合下列规定:

    1 DIYIJIEZHUANGXIAYASHICHUIZHIDUPIANCHABUYINGDAYU0.5%;

亚博体育彩票    2 YIJIANGMEIGENZHUANGYICIXINGLIANXUYADAODI,QIEZUIHOUYIJIEYOUXIAOZHUANGZHANGBUYIXIAOYU5m;

    3 BAOYALIBUYINGDAYUZHUANGSHENYUNXUCEXIANGYALIDE1.1BEI;

亚博体育彩票    4 DUIYUDAMIANJIZHUANGQUN,YINGKONGZHIRIYAZHUANGLIANG。

7.5.9 终压条件应符合下列规定:

亚博体育彩票    1 YINGGENJUXIANCHANGSHIYAZHUANGDESHIYANJIEGUOQUEDINGZHONGYABIAOZHUN;

亚博体育彩票    2 ZHONGYALIANXUFUYACISHUYINGGENJUZHUANGZHANGJIDIZHITIAOJIANDENGYINSUQUEDING。DUIYURUTUSHENDUDAYUHUODENGYU8mDEZHUANG,FUYACISHUKEWEI2~3CI;DUIYURUTUSHENDUXIAOYU8mDEZHUANG,FUYACISHUKEWEI3~5CI;

    3 WENYAYAZHUANGLIBUDEXIAOYUZHONGYALI,WENDINGYAZHUANGDESHIJIANYIWEI5~10s。

7.5.10 压桩顺序宜根据场地工程地质条件确定,并应符合下列规定:

    1 DUIYUCHANGDIDICENGZHONGJUBUHANSHA、SUISHI、LUANSHISHI,YIXIANDUIGAIQUYUJINXINGYAZHUANG;

    2 DANGCHILICENGMAISHENHUOZHUANGDERUTUSHENDUCHABIEJIAODASHI,YIXIANSHIYAZHANGZHUANGHOUSHIYADUANZHUANG。

7.5.11 压桩过程中应测量桩身的垂直度。当桩身垂直度偏差大于1%时,应找出原因并设法纠正;当桩尖进入较硬土层后,严禁用移动机架等方法强行纠偏。

7.5.12 出现下列情况之一时,应暂停压桩作业,并分析原因,采用相应措施:

    1 YALIBIAODUSHUXIANSHIQINGKUANGYUKANCHABAOGAOZHONGDETUCENGXINGZHIMINGXIANBUFU;

    2 ZHUANGNANYICHUANYUEYINGJIACENG;

    3 SHIJIZHUANGZHANGYUSHEJIZHUANGZHANGXIANGCHAJIAODA;

    4 CHUXIANYICHANGXIANGSHENG;YAZHUANGJIXIEGONGZUOZHUANGTAICHUXIANYICHANG;

    5 ZHUANGSHENCHUXIANZONGXIANGLIEFENGHEZHUANGTOUHUNNINGTUCHUXIANBOLUODENGYICHANGXIANXIANG;

亚博体育彩票    6 JIACHIJIGOUDAHUA;

亚博体育彩票    7 YAZHUANGJIXIAXIAN。

7.5.13 静压送桩的质量控制应符合下列规定;

    1 XUELIANGZHUANGDECHUIZHIDUBINGJIANCHAZHUANGTOUZHILIANG,HEGEHOUFANGKESONGZHUANG,YAZHUANG、SONGZHUANGZUOYEYINGLIANXUJINXING;

亚博体育彩票    2 SONGZHUANGYINGCAIYONGZHUANZHIGANGZHISONGZHUANGQI,BUDEJIANGGONGCHENGZHUANGYONGZUOSONGZHUANGQI;

亚博体育彩票    3 DANGCHANGDISHANGDUOSHUZHUANGDEYOUXIAOZHUANGZHANGXIAOYUHUODENGYU15mHUOZHUANGDUANCHILICENGWEIFENGHUARUANZHIYAN,XUYAOFUYASHI,SONGZHUANGSHENDUBUYICHAOGUO1.5m;

    4 CHUMANZUBENTIAOSHANGSHU3KUANGUIDINGWAI,DANGZHUANGDECHUIZHIDUPIANCHAXIAOYU1%,QIEZHUANGDEYOUXIAOZHUANGZHANGDAYU15mSHI,JINGYAZHUANGSONGZHUANGSHENDUBUYICHAOGUO8m;

亚博体育彩票    5 SONGZHUANGDEZUIDAYAZHUANGLIBUYICHAOGUOZHUANGSHENYUNXUBAOYAYAZHUANGLIDE1.1BEI。

7.5.14 引孔压桩法质量控制应符合下列规定:

    1 YINKONGYICAIYONGLUOXUANZUANGANZUOYEFA;YINKONGDECHUIZHIDUPIANCHABUYIDAYU0.5%;

    2 YINKONGZUOYEHEYAZHUANGZUOYEYINGLIANXUJINXING,JIANGESHIJIANBUYIDAYU12h;ZAIRUANTUDIJIZHONGBUYIDAYU3h;

    3 YINKONGZHONGYOUJISHUISHI,YICAIYONGKAIKOUXINGZHUANGJIAN。

7.5.15 当桩较密集,或地基为饱和淤泥、淤泥质土及黏性土时,应设置塑料排水板、袋装砂井消减超孔压或采取引孔等措施,并可按本规范第7.4.9条执行。在压桩施工过程中应对总桩数10%的桩设置上涌和水平偏位观测点,定时检测桩的上浮量及桩顶水平偏位值,若上涌和偏位值较大,应采取复压等措施。

7.5.16 对预制混凝土方桩、预应力混凝土空心桩、钢桩等压入桩的桩位偏差,应符合本规范表7.4.5的规定。


7.6 钢桩(钢管桩、H型桩及其他异型钢桩)施工

ⅠGANGZHUANGDEZHIZUO


7.6.1 制作钢桩的材料应符合设计要求,并应有出厂合格证和试验报告。

7.6.2 现场制作钢桩应有平整的场地及挡风防雨措施。

7.6.3 钢桩制作的允许偏差应符合表7.6.3的规定,钢桩的分段长度应满足本规范第7.1.5条的规定,且不宜大于15m。


▼ 展开条文说明

7.6.4 用于地下水有侵蚀性的地区或腐蚀性土层的钢桩,应按设计要求作防腐处理。


Ⅱ钢桩的焊接


7.6.5 钢桩的焊接应符合下列规定:

    1 BIXUQINGCHUZHUANGDUANBUDEFUXIU、YOUWUDENGZANGWU,BAOCHIGANZAO;XIAJIEZHUANGDINGJINGCHUIJIHOUBIANXINGDEBUFENYINGGECHU;

    2 SHANGXIAJIEZHUANGHANJIESHIYINGXIAOZHENGCHUIZHIDU,DUIKOUDEJIANXIYIWEI2~3mm;

    3 HANSI(ZIDONGHAN)HUOHANTIAOYINGHONGGAN;

    4 HANJIEYINGDUICHENGJINXING;

    5 YINGCAIYONGDUOCENGHAN,GANGGUANZHUANGGECENGHANFENGDEJIETOUYINGCUOKAI,HANZHAYINGQINGCHU;

亚博体育彩票    6 DANGQIWENDIYU0℃HUOYUXUETIANJIWUKEKAOCUOSHIQUEBAOHANJIEZHILIANGSHI,BUDEHANJIE;

    7 MEIGEJIETOUHANJIEWANBI,YINGLENGQUE1minHOUFANGKECHUIJI;

    8 HANJIEZHILIANGYINGFUHEGUOJIAXIANXINGBIAOZHUN《GANGJIEGOUGONGCHENGSHIGONGZHILIANGYANSHOUGUIFAN》GB 50205HE《JIANZHUGANGJIEGOUHANJIEJISHUGUICHENG》JGJ 81DEGUIDING,MEIGEJIETOUCHUYINGANBIAO7.6.5GUIDINGJINXINGWAIGUANJIANCHAWAI,HAIYINGANJIETOUZONGSHUDE5%JINXINGCHAOSHENGHUO2%JINXINGXSHEXIANPAIPIANJIANCHA,DUIYUTONGYIGONGCHENG,TANSHANGCHOUYANGJIANYANBUDESHAOYU3GEJIETOU。


▼ 展开条文说明

7.6.6 H型钢桩或其他异型薄壁钢桩,接头处应加连接板,可按等强度设置。
▼ 展开条文说明

ⅢGANGZHUANGDEYUNSHUHEDUIFANG


亚博体育彩票7.6.7 钢桩的运输与堆放应符合下列规定:

    1 DUIFANGCHANGDIYINGPINGZHENG、JIANSHI、PAISHUITONGCHANG;

    2 ZHUANGDELIANGDUANYINGYOUSHIDANGBAOHUCUOSHI,GANGGUANZHUANGYINGSHEBAOHUQUAN;

    3 BANYUNSHIYINGFANGZHIZHUANGTIZHUANGJIERZAOCHENGZHUANGDUAN、ZHUANGTISUNHUAIHUOWANQU;

    4 钢桩应按规格、材质分别堆放,堆放层数:φ900mm的钢桩,不宜大于3层;φ600mm的钢桩,不宜大于4层;φ400mm的钢桩,不宜大于5层,H型钢桩不宜大于6层。支点设置应合理,钢桩的两侧应采用木楔塞住。
▼ 展开条文说明

   ⅥGANGZHUANGDECHENZHUANG


7.6.8 当钢桩采用锤击沉桩时,可按本规范第7.4节有关条文实施;当采用静压沉桩时,可按本规范第7.5节有关条文实施。

7.6.9 对敞口钢管桩,当锤击沉桩有困难时,可在管内取土助沉。
▼ 展开条文说明

7.6.10 锤击H型钢桩时,锤重不宜大于4.5t级(柴油锤),且在锤击过程中桩架前应有横向约束装置。
▼ 展开条文说明

7.6.11 当持力层较硬时,H型钢桩不宜送桩。
▼ 展开条文说明

7.6.12 当地表层遇有大块石、混凝土块等回填物时,应在插入H型钢桩前进行触探,并应清除桩位上的障碍物。
▼ 展开条文说明


8承台施工

8.1 基坑开挖和回填

8.1.1 桩基承台施工顺序宜先深后浅。

8.1.2 当承台埋置较深时,应对邻近建筑物及市政设施采取必要的保护措施,在施工期间应进行监测。

8.1.3 基坑开挖前应对边坡支护形式、降水措施、挖土方案、运土路线及堆土位置编制施工方案,若桩基施工引起超孔隙水压力,宜待超孔隙水压力大部分消散后开挖。
▼ 展开条文说明

8.1.4 当地下水位较高需降水时,可根据周围环境情况采用内降水或外降水措施。
▼ 展开条文说明

8.1.5 挖土应均衡分层进行,对流塑状软土的基坑开挖,高差不应超过1m。
▼ 展开条文说明

8.1.6 挖出的土方不得堆置在基坑附近。

8.1.7 机械挖土时必须确保基坑内的桩体不受损坏。

8.1.8 基坑开挖结束后,应在基坑底做出排水盲沟及集水井,如有降水设施仍应维持运转。

亚博体育彩票8.1.9 ZAICHENGTAIHEDIXIASHIWAIQIANGYUJIKENGCEBIJIANXIHUITIANTUQIAN,YINGPAICHUJISHUI,QINGCHUXUTUHEJIANZHULAJI,TIANTUYINGANSHEJIYAOQIUXUANLIAO,FENCENGHANGSHI,DUICHENGJINXING。


8.2 钢筋和混凝土施工

亚博体育彩票8.2.1 BANGZHAGANGJINQIANYINGJIANGGUANZHUZHUANGZHUANGTOUFUJIANGBUFENHEYUZHIZHUANGZHUANGDINGCHUIJIMIANPOSUIBUFENQUCHU,ZHUANGTIJIQIZHUJINMAIRUCHENGTAIDEZHANGDUYINGFUHESHEJIYAOQIU;GANGGUANZHUANGSHANGYINGJIAHANZHUANGDINGLIANJIEJIAN;BINGYINGANSHEJISHIZUOZHUANGTOUHEDIANCENGFANGSHUI。

8.2.2 承台混凝土应一次浇筑完成,混凝土入槽宜采用平铺法。对大体积混凝上施工,应采取有效措施防止温度应力引起裂缝。
▼ 展开条文说明


9桩基工程质量检查和验收

9.1 一般规定

亚博体育彩票9.1.1 ZHUANGJIGONGCHENGYINGJINXINGZHUANGWEI、ZHUANGZHANG、ZHUANGJING、ZHUANGSHENZHILIANGHEDANZHUANGCHENGZAILIDEJIANYAN。

9.1.2 桩基工程的检验按时间顺序可分为三个阶段:施工前检验、施工检验和施工后检验。

9.1.3 对砂、石子、水泥、钢材等桩体原材料质量的检验项目和方法应符合国家现行有关标准的规定。
▼ 展开条文说明


9.2 施工前检验

9.2.1 SHIGONGQIANYINGYANGEDUIZHUANGWEIJINXINGJIANYAN。

9.2.2 顶制桩(混凝土预制桩、钢桩)施工前应进行下列检验:

亚博体育彩票    1 CHENGPINZHUANGYINGANXUANDINGDEBIAOZHUNTUHUOSHEJITUZHIZUO,XIANCHANGYINGDUIQIWAIGUANZHILIANGJIZHUANGSHENHUNNINGTUQIANGDUJINXINGJIANYAN;

亚博体育彩票    2 YINGDUIJIEZHUANGYONGHANTIAO、YAZHUANGYONGYALIBIAODENGCAILIAOHESHEBEIJINXINGJIANYAN。

9.2.3 灌注桩施工的应进行下列检验:

亚博体育彩票    1 HUNNINGTUBANZHIYINGDUIYUANCAILIAOZHILIANGYUJILIANG、HUNNINGTUPEIHEBI,TANLUODU、HUNNINGTUQIANGDUDENGJIDENGJINXINGJIANCHA;

亚博体育彩票    2 GANGJINLONGZHIZUOYINGDUIGANGJINGUIGE、HANTIAOGUIGE。PINZHONG、HANKOUGUIGE、HANFENGZHANGDU,HANFENGWAIGUANHEZHILIANG、ZHUJINHEGUJINDEZHIZUOPIANCHADENGJINXINGJIANCHA,GANGJINLONGZHIZUOYUNXUPIANCHAYINGFUHEBENGUIFANBIAO6.2.5DEYAOQIU。


9.3 施工检验

9.3.1 DINGZHIZHUANG(HUNNINGTUYUZHIZHUANG、GANGZHUANG)SHIGONGGUOCHENGZHONGYINGJINXINGXIALIEJIANYAN:

    1 DARU(JINGYA)SHENDU、TINGCHUIBIAOZHUN、JINGYAZHONGZHIYALIZHIJIZHUANGSHEN(JIA)CHUIZHIDUJIANCHA;

    2 JIEZHUANGZHILIANG、JIEZHUANGJIANXIESHIJIANJIZHUANGDINGWANZHENGZHUANGKUANG;

    3 MEIMIJINCHICHUIJISHU、ZUIHOU1.0mJINCHICHUIJISHU、ZONGCHUIJISHU,ZUIHOUSANZHENGUANRUDUJIZHUANGJIANBIAOGAODENG。

9.3.2 灌注桩施工过程中应进行下列检验:

    1 GUANZHUHUNNINGTUQIAN,YINGANZHAOBENGUIFANDI6ZHANGYOUGUANSHIGONGZHILIANGYAOQIU,DUIYICHENGKONGDEZHONGXINWEIZHI、KONGSHEN、KONGJING、CHUIZHIDU,KONGDICHENZHAHOUDUJINXINGJIANYAN;

    2 YINGDUIGANGJINLONGANFANGDESHIJIWEIZHIDENGJINXINGJIANCHA,JINGTIANXIEXIANGYINGZHILIANGJIANCE、JIANCHAJILU;

亚博体育彩票    3 GANZUOYETIAOJIANXIACHENGKONGHOUYINGDUIDAZHIJINGZHUANGZHUANGDUANCHILICENGJINXINGJIANYAN。

9.3.3 对于沉管灌注桩施工工序的质量检查宜按本规范第9.1.1~9.3.2条有关项目进行。

9.3.4 对于挤土顶制桩和挤土灌注桩,施工过程均应对桩顶和地面土体的竖向和水平位移进行系统观测;若发现异常,应采取复打、复压、引孔、设置排水措施及调整沉桩速率等措施。


9.4 施工后检验

亚博体育彩票9.4.1 GENJUBUTONGZHUANGXINGYINGANBENGUIFANBIAO6.2.4JIBIAO7.4.5GUIDINGJIANCHACHENGZHUANGZHUANGWEIPIANCHA。

9.4.2 工程桩应进行承载力和桩身质量检验。

9.4.3 有下列情况之一的桩基工程,应采用静荷载试验对工程桩单桩竖向承载力进行检测,检测数量应根据桩基设计等级、施工前取得试验数据的可靠性因素.按现行行业标准《建筑基桩检测技术规范》JGJ 106确定:

    1 GONGCHENGSHIGONGQIANYIJINXINGDANZHUANGJINGZAISHIYAN,DANSHIGONGGUOCHENGBIANGENGLEGONGYICANSHUHUOSHIGONGZHILIANGCHUXIANYICHANGSHI;

亚博体育彩票    2 SHIGONGQIANGONGCHENGWEIANBENGUIFANDI5.3.1TIAOGUIDINGJINXINGDANZHUANGJINGZAISHIYANDEGONGCHENG;

亚博体育彩票    3 DIZHITIAOJIANFUZA、ZHUANGDESHIGONGZHILIANGKEKAOXINGDI;

    4 CAIYONGXINZHUANGXINGHUOXINGONGYI。

9.4.4 有下列情况之一的桩基工程,可采用高应变动测法对工程桩单桩竖向承载力进行检测:

    1 CHUBENGUIFANDI9.4.3TIAOGUIDINGTIAOJIANWAIDEZHUANGJI;

亚博体育彩票    2 SHEJIDENGJIWEIJIA、YIJIDEJIANZHUZHUANGJIJINGZAISHIYANJIANCEDEFUZHUJIANCE。

9.4.5 桩身质量除对预留混凝土试件进行强度等级检验外,尚应进行现场检测。检测方法可采用可靠的动测法,对于大直径桩还可采取钻芯法、声波透射法;检测数量可根据现行行业标准《建筑基桩检测技术规范》JGJ 106确定。
▼ 展开条文说明

9.4.6 对专用抗拔桩和对水平承载力有特殊要求的桩基工程,应进行单桩抗拔静载试验和水平静载试验检测。


9.5 基桩及承台工程验收资料

9.5.1 DANGZHUANGDINGSHEJIBIAOGAOYUSHIGONGCHANGDIBIAOGAOXIANGJINSHI,JIZHUANGDEYANSHOUYINGDAIJIZHUANGSHIGONGWANBIHOUJINXING;DANGZHUANGDINGSHEJIBIAOGAODIYUSHIGONGCHANGDIBIAOGAOSHI,YINGDAIKAIWADAOSHEJIBIAOGAOHOUJINXINGYANSHOU。

9.5.2 基桩验收应包括下列资料:

    1 YANTUGONGCHENGKANCHABAOGAO、ZHUANGJISHIGONGTU、TUZHIHUISHENJIYAO、SHEJIBIANGENGDANJICAILIAODAIYONGTONGZHIDANDENG;

亚博体育彩票    2 JINGSHENDINGDESHIGONGZUZHISHEJI、SHIGONGFANGANJIZHIXINGZHONGDEBIANGENGDAN;

亚博体育彩票    3 ZHUANGWEICELIANGFANGXIANTU,BAOKUOGONGCHENGZHUANGWEIXIANFUHEDAZHENGDAN;

亚博体育彩票    4 YUANCAILIAODEZHILIANGHEGEHEZHILIANGJIANDINGSHU;

亚博体育彩票    5 BANCHENGPINRUYUZHIZHUANG、GANGZHUANGDENGCHANPINDEHEGEZHENG;

亚博体育彩票    6 SHIGONGJILUJIYINBIGONGCHENGYANSHOUWENJIAN;

    7 CHENGZHUANGZHILIANGJIANCHABAOGAO;

亚博体育彩票    8 DANZHUANGCHENGZAILIJIANCEBAOGAO;

亚博体育彩票    9 JIKENGWAZHISHEJIBIAOGAODEJIZHUANGJUNGONGPINGMIANTUJIZHUANGDINGBIAOGAOTU;

    10 QITABIXUTIGONGDEWENJIANHEJILU。

9.5.3 承台工程验收时应包括下列资料:

亚博体育彩票    1 CHENGTAIGANGJIN、HUNNINGTUDESHIGONGYUJIANCHAJILU;

    2 ZHUANGTOUYUCHENGTAIDEMAOJIN、BIANZHUANGLICHENGTAIBIANYUANJULI、CHENGTAIGANGJINBAOHUCENGJILU;

    3 ZHUANGTOUYUCHENGTAIFANGSHUIGOUZAOJISHIGONGZHILIANG;

    4 CHENGTAIHOUDU、ZHANGDUHEKUANDUDELIANGCEJILUJIWAIGUANQINGKUANGMIAOSHUDENG。

9.5.4 承台工程验收除符合本节规定外,尚应符合现行国家标准《混凝土结构工程施工质量验收规范》GB 50204的规定。


 附录A 桩型与成桩工艺选择

A.0.1 ZHUANGXINGYUCHENGZHUANGGONGYIYINGGENJUJIANZHUJIEGOULEIXING、HEZAIXINGZHI、ZHUANGDESHIYONGGONGNENG、CHUANYUETUCENG、ZHUANGDUANCHILICENG、DIXIASHUIWEI、SHIGONGSHEBEI、SHIGONGHUANJING、SHIGONGJINGYAN、ZHIZHUANGCAILIAOGONGYINGDENGTIAOJIANXUANZE。KEANBIAOA.0.1JINXING。

 

 


 附录B 预应力混凝土空心桩基本参数

B.0.1 LIXINCHENGXINGDEXIANZHANGFAYUYINGLIHUNNINGTUGUANZHUANGDEJIBENCANSHUKEANBIAOB.0.1XUANYONG。

 

 

 


 附录C 考虑承台(包括地下墙体)、基桩协同工作和土的弹性抗力作用计算受水平荷载的桩基

C.0.1 JIBENJIADING:

    1 JIANGTUTISHIWEIDANXINGJIEZHI,QISHUIPINGKANGLIXISHUSUISHENDUXIANXINGZENGJIA(mFA),DIMIANCHUWEILING。

    DUIYUDICHENGTAIZHUANGJI,ZAIJISUANZHUANGJISHI,JIADINGZHUANGDINGBIAOGAOCHUDESHUIPINGKANGLIXISHUWEILINGBINGSUISHENDUZENGZHANG。

    2 ZAISHUIPINGLIHESHUXIANGYALIZUOYONGXIA,JIZHUANG、CHENGTAI、DIXIAQIANGTIBIAOMIANSHANGRENYIDIANDEJIECHUYINGLI(FAXIANGDANXINGKANGLI)YUGAIDIANDEFAXIANGWEIYIδCHENGZHENGBI。

亚博体育彩票    3 HULVEZHUANGSHEN、CHENGTAI、DIXIAQIANGTICEMIANYUTUZHIJIANDENIANZHELIHEMOCALIDUIDIKANGSHUIPINGLIDEZUOYONG。

亚博体育彩票    4 ANFUHEZHUANGJISHEJISHI,JIFUHEBENGUIFANDI5.2.5TIAOGUIDING,KEKAOLVCHENGTAIDITUDESHUXIANGKANGLIHESHUIPINGMOZULI。

亚博体育彩票    5 ZHUANGDINGYUCHENGTAIGANGXINGLIANJIE(GUJIE),CHENGTAIDEGANGDUSHIWEIWUQIONGDA。YINCI,ZHIYOUDANGCHENGTAIDEGANGDUJIAODAHUOYOUYUSHANGBUJIEGOUYUCHENGTAIDEXIETONGZUOYONGSHICHENGTAIDEGANGDUDEDAOZENGQIANGDEQINGKUANGXIA,CAISHIYUCAIYONGCIZHONGFANGFAJISUAN。

    JISUANZHONGKAOLVTUDEDANXINGKANGLISHI,YAOZHUYITUTIDEWENDINGXING。

  C.0.2 基本计算参数;

亚博体育彩票    1 DIJITUSHUIPINGKANGLIXISHUDEBILIXISHUm,QIZHIANBENGUIFANDI5.7.5TIAOGUIDINGCAIYONG。

    DANGJIZHUANGCEMIANWEIJIZHONGTUCENGZUCHENGSHI,YINGQIUDEZHUYAOYINGXIANGSHENDUhm=2(d+1)MIFANWEINEIDEmZHIZUOWEIJISUANZHI(JIANTUC.0.2)。

 

亚博体育彩票    4 YANSHIDIJIDESHUXIANGKANGLIXISHUCR

    5 ZHUANGSHENKANGWANGANGDUEI:ANBENGUIFANDI5.7.2TIAODI6KUANDEGUIDINGJISUANQUEDING。

    6 ZHUANGSHENZHOUXIANGYALICHUANDIXISHUξN:

ξN=O.5~1.0

亚博体育彩票    MOCAXINGZHUANGQUXIAOZHI,DUANCHENGXINGZHUANGQUDAZHI。

    7 DIJITUYUCHENGTAIDIZHIJIANDEMOCAXISHUμ,ANBENGUIFANBIAO5.7.3—2QUZHI。

   C.0.3 JISUANGONGSHI:

    1 DANZHUANGJICHUHUOCHUIZHIYUWAILIZUOYONGPINGMIANDEDANPAIZHUANGJICHU,JIANBIAOC.0.3-1。

亚博体育彩票    2 WEIYU(HUOPINGXINGYU)WAILIZUOYONGPINGMIANDEDANPAI(HUODUOPAI)ZHUANGDICHENGTAIZHUANGJI,JIANBIAOC.0.3-2。

亚博体育彩票    3 WEIYU(HUOPINGXINGYU)WAILIZUOYONGPINGMIANDEDANPAI(HUODUOPAI)ZHUANGGAOCHENGTAIZHUANGJI,JIANBIAOC.0.3-3。

亚博体育彩票   C.0.4 QUEDINGDIZHENZUOYONGXIAZHUANGJIJISUANCANSHUHETUSHIDEJIGEWENTI:

    1 DANGCHENGTAIDIMIANYISHANGTUCENGWEIYEHUACENGSHI,BUKAOLVCHENGTAICEMIANTUTIDEDANXINGKANGLIHECHENGTAIDITUDESHUXIANGDANXINGKANGLIYUMOZULI,CISHI,LING(Cn=Cb=0,KEANZUOC.0.3-3GAOCHENGTAIGONGSHIJISUAN。

    2 DANGCHENGTAIDIMIANYISHANGWEIFEIYEHUACENG,ERCHENGTAIDIMIANYUCHENGTAIDIMIANXIATUTIKENENGFASHENGTUOLISHI(CHENGTAIDIMIANYIXIAYOUQIANGUJIE、ZIZHONGSHIXIAN,ZHENXIAN、YEHUATUTISHI),BUKAOLVCHENGTAIDIDIJISHANGDESHUXIANGDANXINGKANGLIHEMOZULI,ZHIKAOLVCHENGTAICEMIANTUTIDEDANXINGKANGLI,YIANBIAOC.0.3-3GAOCHENGTAITUSHIJINXINGJISUAN,DANJISUANCHENGTAIDANWEIBIANWEIYINQIDEZHUANGDING、CHENGTAI、DIXIAQIANGTIDEFANLIHESHI,YINGKAOLVCHENGTAIHEDIXIAQIANGTICEMIANTUTIDANXINGKANGLIDEYINGXIANG。KEANBIAOC.0.3-2DEBUZHOU5DEGONGSHIJISUAN(Cb=0)。

亚博体育彩票    3 DANGZHUANGDINGYIXIA2(d+1)MISHENDUNEIYOUYEHUAJIACENGSHI,QISHUIPINGKANGLIXISHUDEBILIXISHUZONGHEJISUANZHIm,XIJIANGYEHUACENGDEmZHIANBENGUIFANBIAO5.3.12ZHEJIANHOU,DAIRUSHI(C.0.2-1)HUOSHI(C.0.2-2)ZHONGJISUANQUEDING。

 

 

 

 

 

 

 

 

 

 

 

 

 


 附录D Boussinesq(布辛奈斯克)解的附加应力系数 α 、平均附加应力系数α

D.0.1 JUXINGMIANJISHANGJUNBUHEZAIZUOYONGXIAJIAODIANDEFUJIAYINGLIXISHUα、PINGJUNFUJIAYINGLIXISHUα YINGANBIAOD.0.1-1、D.0.1-2QUEDING。

 

 

 

 

 

 

 

 

 

D.0.3 圆形面积上均布荷载作用系中点的附加应力系数α、平均附加应力系数 α 应按表D.0.3确定。

D.0.4 圆形面积上三角形分布荷载作用下边点的附加应力系数α、平均附加应力系数 α 应按表D.0.4确定。

 


 附录E 桩基等效沉降系数ψe计算参数

E.0.1 ZHUANGJIDENGXIAOCHENJIANGXISHUYINGANBIAOE.0.1-1~BIAOE.0.1-5ZHONGLIECHUDECANSHU,CAIYONGBENGUIFANSHI(5.5.9-1)HESHI(5.9.9-2)JISUAN。

 

 

 

 

 

 

 


 附录F 考虑柱径影响的Mindlin(明德林)解应力影响系数

F.0.1 BENGUIFANDI5.5.14TIAOGUIDINGJIZHUANGYINQIDEFUJIAYINGLIYINGGENJUKAOLVZHUANGJINGYINGXIANGDEMINGDELINJIEANXIALIEGONGSHIJISUAN:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


 附录G 按倒置弹性地基梁计算砌体墙下条形桩基承台梁

G.0.1 ANDAOZHIDANXINGDIJILIANGJISUANQITIQIANGXIATIAOXINGZHUANGJILIANXUCHENGTAILIANGSHI,XIANQIUDEZUOYONGYULIANGSHANGDEHEZAI,RANHOUANPUTONGLIANXULIANGJISUANQIWANJUHEJIANLI。WANJUHEJIANLIDEJISUANGONGSHIKEGENJUTUG.0.1SUOSHIJISUANJIANTU,FENBIEANBIAOG.0.1CAIYONG。

 

 

    当门窗口下布有桩,且承台梁顶面至门窗口的砌体高度小于门窗口的净宽时,则应按倒置的简支梁计算该段梁的弯距,即取门窗净宽的1.05倍为计算跨度,取门窗下桩顶荷载为计算集中荷载进行计算。


 附录H 锤击沉桩锤重的选用

H.0.1 CHUIJICHENZHUANGDECHUIZHONGKEGENJUBIAOH.0.1XUANYONG。

1

总则

1.0.1 WEILEZAIZHUANGJISHEJIYUSHIGONGZHONGGUANCHEZHIXINGGUOJIADEJISHUJINGJIZHENGCE,ZUODAOANQUANSHIYONG、JISHUXIANJIN、JINGJIHELI、QUEBAOZHILIANG,BAOHUHUANJING,ZHIDINGBENGUIFAN。

1.0.2 本规范适用于建筑(包括构筑物)桩基的设计、施工及验收。

1.0.3 桩基的设计与施工,应综合考虑工程地质与水文地质条件、上部结构类型、使用功能、荷载特征、施工技术条件与环境;应重视地方经验,因地制宜,注重概念设计,合理选择桩型、成桩工艺和承台形式,优化布桩,节约资源;应强化施工质量控制与管理。
▼ 展开条文说明

1.0.4 在进行桩基设计、施工及验收时,除应符合本规范外,尚应符合国家现行有关标准、规范的规定。


2术语、符号

2.1 术语


▼ 展开条文说明

2.1.1 ZHUANGJI pile foundation

    YOUSHEZHIYUYANTUZHONGDEZHUANGHEYUZHUANGDINGLIANJIEDECHENGTAIGONGTONGZUCHENGDEJICHUHUOYOUZHUYUZHUANGZHIJIELIANJIEDEDANZHUANGJICHU。

2.1.2 复合桩基 composite pile foundation

    YOUJIZHUANGHECHENGTAIXIADIJITUGONGTONGCHENGDANHEZAIDEZHUANGJICHU。

2.1.3 基桩 foundation pile

    ZHUANGJICHUZHONGDEDANZHUANG。

2.1.4 复合基桩 composite foundation pile

    DANZHUANGJIQIDUIYINGMIANJIDECHENGTAIXIADIJITUZUCHENGDEFUHECHENGZAIJIZHUANG。

2.1.5 减沉复合疏桩基础 composite foundation with settlement-reducing piles

    RUANTUDIJITIANRANDIJICHENGZAILIJIBENMANZUYAOQIUDEQINGKUANGXIA,WEIJIANXIAOCHENJIANGCAIYONGSHUBUMOCAXINGZHUANGDEFUHEZHUANGJI。

2.1.6 单桩竖向极限承载力 ultimate vertical bearing capacity of a single pile

亚博体育彩票    DANZHUANGZAISHUXIANGHEZAIZUOYONGXIADAODAPOHUAIZHUANGTAIQIANHUOCHUXIANBUSHIYUJIXUCHENGZAIDEBIANXINGSHISUODUIYINGDEZUIDAHEZAI,TAQUJUEYUTUDUIZHUANGDEZHICHENGZULIHEZHUANGSHENCHENGZAILI。

2.1.7 极限侧阻力 ultimate shaft resistance

    XIANGYINGYUZHUANGDINGZUOYONGJIXIANHEZAISHI,ZHUANGSHENCEBIAOMIANSUOFASHENGDEYANTUZULI。

2.1.8 极限端阻力 ultimate tip resistance

亚博体育彩票    XIANGYINGYUZHUANGDINGZUOYONGJIXIANHEZAISHI,ZHUANGDUANSUOFASHENGDEYANTUZULI。

2.1.9 单桩竖向承载力特征值 characterisitic value of the vertical bearing capacity of a single pile

    DANZHUANGSHUXIANGJIXIANCHENGZAILIBIAOZHUNZHICHUYIANQUANXISHUHOUDECHENGZAILIZHI。

2.1.10 变刚度调平设计 optimized design of pile foundation stiffness to reduce differential settlement

    KAOLVSHANGBUJIEGOUXINGSHI、HEZAIHEDICENGFENBUYIJIXIANGHUZUOYONGXIAOYING,TONGGUODIAOZHENGZHUANGJING、ZHUANGZHANG、ZHUANGJUDENGGAIBIANJIZHUANGZHICHENGGANGDUFENBU,YISHIJIANZHUWUCHENJIANGQUYUJUNYUN、CHENGTAINEILIJIANGDIDESHEJIFANGFA。

2.1.11 承台效应系数 pile cap effect coefficient

亚博体育彩票    SHUXIANGHEZAIXIA,CHENGTAIDIDIJITUCHENGZAILIDEFAHUILV。

2.1.12 负摩阻力 negative skin friction,negative shaft resistance

    ZHUANGZHOUTUYOUYUZIZHONGGUJIE、SHIXIAN、DIMIANHEZAIZUOYONGDENGYUANYINERCHANSHENGDAYUJIZHUANGDECHENJIANGSUOYINQIDEDUIZHUANGBIAOMIANDEXIANGXIAMOZULI。

2.1.13 下拉荷载 downdrag

亚博体育彩票    ZUOYONGYUDANZHUANGZHONGXINGDIANYISHANGDEFUMOZULIZHIHE。

2.1.14 土塞效应 plugging effect

亚博体育彩票    CHANGKOUKONGXINZHUANGCHENZHUANGGUOCHENGZHONGTUTIYONGRUGUANNEIXINGCHENGDETUSAI,DUIZHUANGDUANZULIDEFAHUICHENGDUDEYINGXIANGXIAOYING。

2.1.15 灌注桩后注浆 post grouting for cast-in-situ pile

    GUANZHUZHUANGCHENGZHUANGHOUYIDINGSHIJIAN,TONGGUOYUSHEYUZHUANGSHENNEIDEZHUJIANGDAOGUANJIYUZHIXIANGLIANDEZHUANGDUAN、ZHUANGCEZHUJIANGFAZHURUSHUINIJIANG,SHIZHUANGDUAN、ZHUANGCETUTI(BAOKUOCHENZHAHENIPI)DEDAOJIAGU,CONGERTIGAODANZHUANGCHENGZAILI,JIANXIAOCHENJIANG。

2.1.16 桩基等效沉降系数 equivalent settlement coefficient for calculating settlement of pile foundations

亚博体育彩票    DANXINGBANWUXIANTIZHONGQUNZHUANGJICHUANMindlin(MINGDELIN)JIEJISUANCHENJIANGLIANGωM,YUANDENGDAIDUNJIBoussinesq(BUXINNAISIKE)JIEJISUANCHENJIANGLIANGωBZHIBI,YONGYIFANYINGMindlinJIEYINGLIFENBUDUIJISUANCHENJIANGDEYINGXIANG。


2.2 符号


▼ 展开条文说明

亚博体育彩票2.2.1 ZUOYONGHEZUOYONGXIAOYING

Fk——ANHEZAIXIAOYINGBIAOZHUNZUHEJISUANDEZUOYONGYUCHENGTAIDINGMIANDESHUXIANGLI;

Gk——ZHUANGJICHENGTAIHECHENGTAISHANGTUZIZHONGBIAOZHUNZHI;

Hk——ANHEZAIXIAOYINGBIAOZHUNZUHEJISUANDEZUOYONGYUCHENGTAIDIMIANDESHUIPINGLI;

Hik——ANHEZAIXIAOYINGBIAOZHUNZUHEJISUANDEZUOYONGYUDI i JIZHUANGHUOFUHEJIZHUANGDESHUIPINGLI;

Mxk、Myk——ANHEZAIXIAOYINGBIAOZHUNZUHEJISUANDEZUOYONGYUCHENGTAIDIMIANDEWAILI,RAOTONGGUOZHUANGQUNXINGXINDEx、yZHUZHOUDELIJU;

亚博体育彩票Nik——HEZAIXIAOYINGBIAOZHUNZUHEPIANXINSHUXIANGLIZUOYONGXIADI i JIZHUANGHUOFUHEJIZHUANGDESHUXIANGLI;

Qgn——ZUOYONGYUQUNZHUANGZHONGMOUYIJIZHUANGDEXIALAHEZAI;

qf——JIZHUANGQIEXIANGDONGZHANGLI。

2.2.2 抗力和材料性能

Es——TUDEYASUOMOLIANG;

ft、fc——HUNNINGTUKANGLA、KANGYAQIANGDUSHEJIZHI;

frk——YANSHIBAOHEDANZHOUKANGYAQIANGDUBIAOZHUNZHI;

fs、qc——JINGLICHUTANSHUANGQIAOTANTOUPINGJUNCEZULI、PINGJUNDUANZULI;

m——ZHUANGCEDIJITUSHUIPINGKANGLIXISHUDEBILIXISHU;

ps——JINGLICHUTANDANQIAOTANTOUBIGUANRUZULI;

亚博体育彩票qsik——DANZHUANGDI i CENGTUDEJIXIANCEZULIBIAOZHUNZHI;

亚博体育彩票qpk——DANZHUANGJIXIANDUANZULIBIAOZHUNZHI;

亚博体育彩票Qsk、Qpk——DANZHUANGZONGJIXIANCEZULI、ZONGJIXIANDUANZULIBIAOZHUNZHI;

亚博体育彩票Quk——DANZHUANGSHUXIANGJIXIANCHENGZAILIBIAOZHUNZHI;

R——JIZHUANGHUOFUHEJIZHUANGSHUXIANGCHENGZAILITEZHENGZHI;

Ra——DANZHUANGSHUXIANGCHENGZAILITEZHENGZHI;

亚博体育彩票Rha——DANZHUANGSHUIPINGCHENGZAILITEZHENGZHI;

Rh——JIZHUANGSHUIPINGCHENGZAILITEZHENGZHI;

Tgk——QUNZHUANGCHENGZHENGTIPOHUAISHIJIZHUANGKANGBAJIXIANCHENGZAILIBIAOZHUNZHI;

Tuk——QUNZHUANGCHENGFEIZHENGTIPOHUAISHIJIZHUANGKANGBAJIXIANCHENGZAILIBIAOZHUNZHI;

γ、γe——TUDEZHONGDU、YOUXIAOZHONGDU。

2.2.3 几何参数

Ap——ZHUANGDUANMIANJI;

Aps——ZHUANGSHENJIEMIANMIANJI;

Ac——JISUANJIZHUANGSUODUIYINGDECHENGTAIDIJINGMIANJI;

Bc——CHENGTAIKUANDU;

d——ZHUANGSHENSHEJIZHIJING;

亚博体育彩票D——ZHUANGDUANKUODISHEJIZHIJING;

l——ZHUANGSHENZHANGDU;

Lc——CHENGTAIZHANGDU;

sa——JIZHUANGZHONGXINJU;

u——ZHUANGSHENZHOUZHANG;

亚博体育彩票zn——ZHUANGJICHENJIANGJISUANSHENDU(CONGZHUANGDUANPINGMIANSUANQI)。

2.2.4 计算系数

αE——GANGJINDANXINGMOLIANGYUHUNNINGTUDANXINGMOLIANGDEBIZHI;

ηc——CHENGTAIXIAOYINGXISHU;

亚博体育彩票ηf——DONGZHANGYINGXIANGXISHU;

ζ——ZHUANGQIANYANDUANCEZUHEDUANZUZONGHEXISHU;

亚博体育彩票ψsi、ψp——DAZHIJINGZHUANGCEZULI、DUANZULICHICUNXIAOYINGXISHU;

λp——ZHUANGDUANTUSAIXIAOYINGXISHU;

λ——JIZHUANGKANGBAXISHU;

亚博体育彩票ψ——ZHUANGJICHENJIANGJISUANJINGYANXISHU;

ψc——CHENGZHUANGGONGYIXISHU;

亚博体育彩票ψe——ZHUANGJIDENGXIAOCHENJIANGXISHU;

α、α——BoussinesqJIEDEFUJIAYINGLIXISHU、PINGJUNFUJIAYINGLIXISHU。


3基本设计规定

3.1 一般规定

3.1.1 桩基础应按下列两类极限状态设计:

    1 CHENGZAINENGLIJIXIANZHUANGTAI:ZHUANGJIDADAOZUIDACHENGZAINENGLI、ZHENGTISHIWENHUOFASHENGBUSHIYUJIXUCHENGZAIDEBIANXING;

    2 正常使用极限状态:桩基达到建筑物正常使用所规定的变形限值或达到耐久性要求的某项限值。
▼ 展开条文说明

3.1.2 根据建筑规模、功能特征、对差异变形的适应性、场地地基和建筑物体形的复杂性以及由于桩基问题可能造成建筑破坏或影响正常使用的程度,应将桩基设计分为表3.1.2所列的三个设计等级。桩基设计时,应根据表3.1.2确定设计等级。


▼ 展开条文说明

3.1.3 桩基应根据具体条件分别进行下列承载能力计算和稳定性验算:

亚博体育彩票    1 YINGGENJUZHUANGJIDESHIYONGGONGNENGHESHOULITEZHENGFENBIEJINXINGZHUANGJIDESHUXIANGCHENGZAILIJISUANHESHUIPINGCHENGZAILIJISUAN;

    2 YINGDUIZHUANGSHENHECHENGTAIJIEGOUCHENGZAILIJINXINGJISUAN;DUIYUZHUANGCETUBUPAISHUIKANGJIANQIANGDUXIAOYU10kPaQIEZHANGJINGBIDAYU50DEZHUANG,YINGJINXINGZHUANGSHENYAQUYANSUAN;DUIYUHUNNINGTUYUZHIZHUANG,YINGANDIAOZHUANG、YUNSHUHECHUIJIZUOYONGJINXINGZHUANGSHENCHENGZAILIYANSUAN;DUIYUGANGGUANZHUANG,YINGJINXINGJUBUYAQUYANSUAN;

    3 DANGZHUANGDUANPINGMIANYIXIACUNZAIRUANRUOXIAWOCENGSHI,YINGJINXINGRUANRUOXIAWOCENGCHENGZAILIYANSUAN;

    4 DUIWEIYUPODI、ANBIANDEZHUANGJI,YINGJINXINGZHENGTIWENDINGXINGYANSUAN;

亚博体育彩票    5 DUIYUKANGFU,KANGBAZHUANGJI,YINGJINXINGJIZHUANGHEQUNZHUANGDEKANGBACHENGZAILIJISUAN;

    6 对于抗震设防区的桩基,应进行抗震承载力验算。
▼ 展开条文说明

3.1.4 下列建筑桩基应进行沉降计算:

亚博体育彩票    1 SHEJIDENGJIWEIJIAJIDEFEIQIANYANZHUANGHEFEISHENHOUJIANYINGCHILICENGDEJIANZHUZHUANGJI;

亚博体育彩票    2 SHEJIDENGJIWEIYIJIDETIXINGFUZA、HEZAIFENBUXIANZHUBUJUNYUNHUOZHUANGDUANPINGMIANYIXIACUNZAIRUANRUOTUCENGDEJIANZHUZHUANGJI;

    3 RUANTUDIJIDUOCENGJIANZHUJIANCHENFUHESHUZHUANGJICHU。

3.1.5 对受水平荷载较大,或对水平位移有严格限制的建筑桩基,应计算其水平位移。
▼ 展开条文说明

3.1.6 应根据桩基所处的环境类别和相应的裂缝控制等级,验算桩和承台正截面的抗裂和裂缝宽度。
▼ 展开条文说明

3.1.7 桩基设计时,所采用的作用效应组合与相应的抗力应符合下列规定:

    1 QUEDINGZHUANGSHUHEBUZHUANGSHI,YINGCAIYONGCHUANZHICHENGTAIDIMIANDEHEZAIXIAOYINGBIAOZHUNZUHE;XIANGYINGDEKANGLIYINGCAIYONGJIZHUANGHUOFUHEJIZHUANGCHENGZAILITEZHENGZHI。

亚博体育彩票    2 JISUANHEZAIZUOYONGXIADEZHUANGJICHENJIANGHESHUIPINGWEIYISHI,YINGCAIYONGHEZAIXIAOYINGZHUNYONGJIUZUHE;JISUANSHUIPINGDIZHENZUOYONG、FENGZAIZUOYONGXIADEZHUANGJISHUIPINGWEIYISHI,YINGCAIYONGSHUIPINGDIZHENZUOYONG、FENGZAIXIAOYINGBIAOZHUNZUHE。

亚博体育彩票    3 YANSUANPODI、ANBIANJIANZHUZHUANGJIDEZHENGTIWENDINGXINGSHI,YINGCAIYONGHEZAIXIAOYINGBIAOZHUNZUHE;KANGZHENSHEFANGQU,YINGCAIYONGDIZHENZUOYONGXIAOYINGHEHEZAIXIAOYINGDEBIAOZHUNZUHE。

亚博体育彩票    4 ZAIJISUANZHUANGJIJIEGOUCHENGZAILI、QUEDINGCHICUNHEPEIJINSHI,YINGCAIYONGCHUANZHICHENGTAIDINGMIANDEHEZAIXIAOYINGJIBENZUHE。DANGJINXINGCHENGTAIHEZHUANGSHENLIEFENGKONGZHIYANSUANSHI,YINGFENBIECAIYONGHEZAIXIAOYINGBIAOZHUNZUHEHEHEZAIXIAOYINGZHUNYONGJIUZUHE。

亚博体育彩票    5 ZHUANGJIJIEGOUANQUANDENGJI、JIEGOUSHEJISHIYONGNIANXIANHEJIEGOUZHONGYAOXINGXISHUγ0YINGANXIANXINGYOUGUANJIANZHUJIEGOUGUIFANDEGUIDINGCAIYONG,CHULINSHIXINGJIANZHUWAI,ZHONGYAOXINGXISHUγ0YINGBUXIAOYU1.0。

    6 对桩基结构进行抗震验算时,其承载力调整系数γRE应按现行国家标准《建筑抗震设计规范》GB 50011的规定采用。
▼ 展开条文说明

3.1.8 以减小差异沉降和承台内力为目标的变刚度调平设计,宜结合具体条件按下列规定实施:

亚博体育彩票    1 DUIYUZHUQUNLOULIANTIJIANZHU,DANGGAOCENGZHUTICAIYONGZHUANGJISHI,QUNFANG(HANCHUNDIXIASHI)DEDIJIHUOZHUANGJIGANGDUYIXIANGDUIRUOHUA,KECAIYONGTIANRANDIJI、FUHEDIJI、SHUZHUANGHUODUANZHUANGJICHU。

亚博体育彩票    2 DUIYUKUANGJIA-HEXINTONGJIEGOUGAOCENGJIANZHUZHUANGJI,YINGQIANGHUAHEXINTONGQUYUZHUANGJIGANGDU(RUSHIDANGZENGJIAZHUANGZHANG、ZHUANGJING、ZHUANGSHU、CAIYONGHOUZHUJIANGDENGCUOSHI),XIANGDUIRUOHUAHEXINTONGWAIWEIZHUANGJIGANGDU(CAIYONGFUHEZHUANGJI,SHIDICENGTIAOJIANJIANXIAOZHUANGZHANG)。

亚博体育彩票    3 DUIYUKUANGJIA-HEXINTONGJIEGOUGAOCENGJIANZHUTIANRANDIJICHENGZAILIMANZUYAOQIUDEQINGKUANGXIA,YIYUHEXINTONGQUYUJUBUSHEZHIZENGQIANGGANGDU、JIANXIAOCHENJIANGDEMOCAXINGZHUANG。

亚博体育彩票    4 DUIYUDATILIANGTONGCANG、CHUGUANDEMOCAXINGZHUANGJI,YIANNEIQIANGWAIRUOYUANZEBUZHUANG。

    5 对上述按变刚度调平设计的桩基,宜进行上部结构-承台-桩-土共同工作分析。
▼ 展开条文说明

3.1.9 软土地基上的多层建筑物,当天然地基承载力基本满足要求时,可采用减沉复合疏桩基础。
▼ 展开条文说明

3.1.10 对于本规范第3.1.4条规定应进行沉降计算的建筑桩基,在其施工过程及建成后使用期间,应进行系统的沉降观测直至沉降稳定。
▼ 展开条文说明

3.2 基本资料

3.2.1 ZHUANGJISHEJIYINGJUBEIYIXIAZILIAO:

亚博体育彩票    1 YANTUGONGCHENGKANCHAWENJIAN:

        1) ZHUANGJIANLIANGLEIJIXIANZHUANGTAIJINXINGSHEJISUOXUYONGYANTUWULILIXUECANSHUJIYUANWEICESHICANSHU;

亚博体育彩票        2) DUIJIANZHUCHANGDIDEBULIANGDIZHIZUOYONG,RUHUAPO、BENGTA、NISHILIU、YANRONG、TUDONGDENG,YOUMINGQUEPANDUAN、JIELUNHEFANGZHIFANGAN;

        3) DIXIASHUIWEIMAIZANGQINGKUANG、LEIXINGHESHUIWEIBIANHUAFUDUJIKANGFUSHEJISHUIWEI,TU、SHUIDEFUSHIXINGPINGJIA,DIXIASHUIFULIJISUANDESHEJISHUIWEI;

        4) KANGZHENSHEFANGQUANSHEFANGLIEDUTIGONGDEYEHUATUCENGZILIAO;

        5) YOUGUANDIJITUDONGZHANGXING、SHIXIANXING、PENGZHANGXINGPINGJIA。

    2 JIANZHUCHANGDIYUHUANJINGTIAOJIANDEYOUGUANZILIAO:

        1) JIANZHUCHANGDIXIANZHUANG,BAOKUOJIAOTONGSHESHI、GAOYAJIAKONGXIAN、DIXIAGUANXIANHEDIXIAGOUZHUWUDEFENBU;

亚博体育彩票        2) XIANGLINJIANZHUWUANQUANDENGJI、JICHUXINGSHIJIMAIZHISHENDU;

亚博体育彩票        3) FUJINLEISIGONGCHENGDIZHITIAOJIANCHANGDIDEZHUANGJIGONGCHENGSHIZHUANGZILIAOHEDANZHUANGCHENGZAILISHEJICANSHU;

        4) ZHOUWEIJIANZHUWUDEFANGZHEN、FANGZAOSHENGDEYAOQIU;

亚博体育彩票        5) NIJIANGPAIFANG、QITUTIAOJIAN;

亚博体育彩票        6) JIANZHUWUSUOZAIDIQUDEKANGZHENSHEFANGLIEDUHEJIANZHUCHANGDILEIBIE。

    3 JIANZHUWUDEYOUGUANZILIAO: 

亚博体育彩票        1) JIANZHUWUDEZONGPINGMIANBUZHITU;

亚博体育彩票        2) JIANZHUWUDEJIEGOULEIXING、HEZAI,JIANZHUWUDESHIYONGTIAOJIANHESHEBEIDUIJICHUSHUXIANGJISHUIPINGWEIYIDEYAOQIU;

        3) JIANZHUJIEGOUDEANQUANDENGJI。

亚博体育彩票    4 SHIGONGTIAOJIANDEYOUGUANZILIAO;

        1) SHIGONGJIXIESHEBEITIAOJIAN,ZHIZHUANGTIAOJIAN,DONGLITIAOJIAN,SHIGONGGONGYIDUIDIZHITIAOJIANDESHIYINGXING;

        2) SHUI、DIANJIYOUGUANJIANZHUCAILIAODEGONGYINGTIAOJIAN;

        3) SHIGONGJIXIEDEJINCHUCHANGJIXIANCHANGYUNXINGTIAOJIAN。

亚博体育彩票    5 GONGSHEJIBIJIAOYONGDEYOUGUANZHUANGXINGJISHISHIDEKEXINGXINGDEZILIAO。

3.2.2 桩基的详细勘察除应满足现行国家标准《岩土工程勘察规范》GB 50021的有关要求外,尚应满足下列要求:

    1 KANTANDIANJIANJU:

        1) DUIYUDUANCHENGXINGZHUANG(HANQIANYANZHUANG):ZHUYAOGENJUZHUANGDUANCHILICENGDINGMIANPODUJUEDING,YIWEI12~24m。DANGXIANGLINLIANGGEKANCHADIANJIELUCHUDEZHUANGDUANCHILICENGCENGMIANPODUDAYU10%HUOCHILICENGQIFUJIAODA、DICENGFENBUFUZASHI,YINGGENJUJUTIGONGCHENGTIAOJIANSHIDANGJIAMIKANTANDIAN。

亚博体育彩票        2) DUIYUMOCAXINGZHUANG:YIAN20~35mBUZHIKANTANKONG,DANYUDAOTUCENGDEXINGZHIHUOZHUANGTAIZAISHUIPINGFANGXIANGFENBUBIANHUAJIAODA,HUOCUNZAIKENENGYINGXIANGCHENGZHUANGDETUCENGSHI,YINGSHIDANGJIAMIKANTANDIAN。

亚博体育彩票        3) FUZADIZHITIAOJIANXIADEZHUXIADANZHUANGJICHUYINGANZHULIEXIANBUZHIKANTANDIAN,BINGYIMEIZHUANGSHEYIKANTANDIAN。

  2 勘探深度:

        1) YIBUZHI1/3~1/2DEKANTANKONGWEIKONGZHIXINGKONG。DUIYUSHEJIDENGJIWEIJIAJIDEJIANZHUZHUANGJI,ZHISHAOYINGBUZHI3GEKONGZHIXINGKONG;SHEJIDENGJIWEIYIJIDEJIANZHUZHUANGJI,ZHISHAOYINGBUZHI2GEKONGZHIXINGKONG。KONGZHIXINGKONGYINGCHUANTOUZHUANGDUANPINGMIANYIXIAYASUOCENGHOUDU;YIBANXINGKANTANKONGYINGSHENRUYUJIZHUANGDUANPINGMIANYIXIA3~5BEIZHUANGSHENSHEJIZHIJING,QIEBUDEXIAOYU3m;DUIYUDAZHIJINGZHUANG,BUDEXIAOYU5m。

        2) QIANYANZHUANGDEKONGZHIXINGZUANKONGYINGSHENRUYUJIZHUANGDUANPINGMIANYIXIABUXIAOYU3~5BEIZHUANGSHENSHEJIZHIJING,YIBANXINGZUANKONGYINGSHENRUYUJIZHUANGDUANPINGMIANYIXIABUXIAOYU1~3BEIZHUANGSHENSHEJIZHIJING。DANGCHILICENGJIAOBOSHI,YINGYOUBUFENZUANKONGZUANCHUANCHILIYANCENG。ZAIYANRONG、DUANCENGPOSUIDAIDIQU,YINGCHAMINGRONGDONG、RONGGOU、RONGCAO、SHISUNDENGDEFENBUQINGKUANG,ZUANKONGYINGZUANCHUANRONGDONGHUODUANCENGPOSUIDAIJINRUWENDINGTUCENG,JINRUSHENDUYINGMANZUSHANGSHUKONGZHIXINGZUANKONGHEYIBANXINGZUANKONGDEYAOQIU。

    3 在勘探深度范围内的每一地层,均应采取不扰动试样进行室内试验或根据土质情况选用有效的原位测试方法进行原位测试,提供设计所需参数。
▼ 展开条文说明


3.3 桩的选型与布置

亚博体育彩票3.3.1 JIZHUANGKEANXIALIEGUIDINGFENLEI:

    1 ANCHENGZAIXINGZHUANGFENLEI:

亚博体育彩票        1) MOCAXINGZHUANG;

        MOCAZHUANG:ZAICHENGZAINENGLIJIXIANZHUANGTAIXIA,ZHUANGDINGSHUXIANGHEZAIYOUZHUANGCEZULICHENGSHOU,ZHUANGDUANZULIXIAODAOKEHULVEBUJI;

        DUANCHENGMOCAZHUANG:ZAICHENGZAINENGLIJIXIANZHUANGTAIXIA,ZHUANGDINGSHUXIANGHEZAIZHUYAOYOUZHUANGCEZULICHENGSHOU。

亚博体育彩票        2) DUANCHENGXINGZHUANG:

亚博体育彩票        DUANCHENGZHUANG:ZAICHENGZAINENGLIJIXIANZHUANGTAIXIA,ZHUANGDINGSHUXIANGHEZAIYOUZHUANGDUANZULICHENGSHOU,ZHUANGCEZULIXIAODAOKEHULVEBUJI;

亚博体育彩票        MOCADUANCHENGZHUANG:ZAICHENGZAINENGLIJIXIANZHUANGTAIXIA,ZHUANGDINGSHUXIANGHEZAIZHUYAOYOUZHUANGDUANZULICHENGSHOU。

亚博体育彩票    2 ANCHENGZHUANGFANGFAFENLEI:

        1) FEIJITUZHUANG:GANZUOYEFAZUAN(WA)KONGGUANZHUZHUANG、NIJIANGHUBIFAZUAN(WA)KONGGUANZHUZHUANG,TAOGUANHUBIFAZUAN(WA)KONGGUANZHUZHUANG;

亚博体育彩票        2) BUFENJITUZHUANG:CHONGKONGGUANZHUZHUANG、ZUANKONGJIKUOGUANZHUZHUANG、JIAOBANJINGXINZHUANG、YUZUANKONGDARU(JINGYA)YUZHIZHUANG、DARU(JINGYA)SHICHANGKOUGANGGUANZHUANG、CHANGKOUYUYINGLIHUNNINGTUKONGXINZHUANGHEHXINGGANGZHUANG;

        3) JITUZHUANG:CHENGUANGUANZHUZHUANG、CHENGUANHANG(JI)KUOGUANZHUZHUANG、DARU(JINGYA)YUZHIZHUANG、BIKOUYUYINGLIHUNNINGTUKONGXINZHUANGHEBIKOUGANGGUANZHUANG。

亚博体育彩票    3 ANZHUANGJING(SHEJIZHIJINGd)DAXIAOFENLEI:

        1) XIAOZHIJINGZHUANG:d≤250mm;

亚博体育彩票        2) ZHONGDENGZHIJINGZHUANG:250mm<d<800mm;

        3) DAZHIJINGZHUANG:d≥800mm。

3.3.2 桩型与成桩工艺应根据建筑结构类型、荷载性质、桩的使用功能,穿越土层、桩端持力层、地下水位、施工设备、施工环境、施工经验、制桩材料供应条件等,按安全适用、经济合理的原则选择。选择时可按本规范附录A进行。

亚博体育彩票    1 DUIYUKUANGJIA-HEXINTONGDENGHEZAIFENBUHENBUJUNYUNDEZHUANGFAJICHU,YIXUANZEJIZHUANGCHICUNHECHENGZAILIKEDIAOXINGJIAODADEZHUANGXINGHEGONGYI。

    2 JITUCHENGUANGUANZHUZHUANGYONGYUYUNIHEYUNIZHITUCENGSHI,YINGJUXIANYUDUOCENGZHUZHAIZHUANGJI。

    3 抗震设防烈度为8度及以上地区,不宜采用预应力混凝土管桩(PC)和预应力混凝土空心方桩(PS)。
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3.3.3 基桩的布置应符合下列条件:

    1 基桩的最小中心距应符合表3.3.3的规定;当施工中采取减小挤土效应的可靠措施时,可根据当地经验适当减小。 
   

   2 PAILIEJIZHUANGSHI,YISHIZHUANGQUNCHENGZAILIHELIDIANYUSHUXIANGYONGJIUHEZAIHELIZUOYONGDIANZHONGHE,BINGSHIJIZHUANGSHOUSHUIPINGLIHELIJUJIAODAFANGXIANGYOUJIAODAKANGWANJIEMIANMOLIANG。

亚博体育彩票    3 DUIYUZHUANGXIANGJICHU、JIANLIQIANGJIEGOUZHUANGFA(HANPINGBANHELIANGBANSHICHENGTAI)JICHU,YIJIANGZHUANGBUZHIYUQIANGXIA。

    4 DUIYUKUANGJIA-HEXINTONGJIEGOUZHUANGFAJICHUYINGANHEZAIFENBUKAOLVXIANGHUYINGXIANG,JIANGZHUANGXIANGDUIJIZHONGBUZHIYUHEXINTONGHEZHUXIA;WAIWEIKUANGJIAZHUYICAIYONGFUHEZHUANGJI,YOUHESHIZHUANGDUANCHILICENGSHI,ZHUANGZHANGYIJIANXIAO。

    5 YINGXUANZEJIAOYINGTUCENGZUOWEIZHUANGDUANCHILICENG。ZHUANGDUANQUANDUANMIANJINRUCHILICENGDESHENDU,DUIYUNIANXINGTU、FENTUBUYIXIAOYU2d,SHATUBUYIXIAOYU1.5d,SUISHILEITUBUYIXIAOYU1d。DANGCUNZAIRUANRUOXIAWOCENGSHI,ZHUANGDUANYIXIAYINGCHILICENGHOUDUBUYIXIAOYU3d。

    6 对于嵌岩桩,嵌岩深度应综合荷载、上覆土层、基岩、桩径、桩长诸因素确定;对于嵌入倾斜的完整和较完整岩的全断面深度不宜小于0.4d且不小于0.5m,倾斜度大于30%的中风化岩,宜根据倾斜度及岩石完整性适当加大嵌岩深度;对于嵌入平整、完整的坚硬岩和较硬岩的深度不宜小于0.2d,且不应小于0.2m。
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3.4 特殊条件下的桩基

亚博体育彩票3.4.1 RUANTUDIJIDEZHUANGJISHEJIYUANZEYINGFUHEXIALIEGUIDING:

    1 RUANTUZHONGDEZHUANGJIYIXUANZEZHONG、DIYASUOXINGTUCENGZUOWEIZHUANGDUANCHILICENG;

    2 ZHUANGZHOUWEIRUANTUYINZIZHONGGUJIE、CHANGDITIANTU、DIMIANDAMIANJIDUIZAI、JIANGDIDIXIASHUIWEI、DAMIANJIJITUCHENZHUANGDENGYUANYINERCHANSHENGDECHENJIANGDAYUJIZHUANGDECHENJIANGSHI,YINGSHIJUTIGONGCHENGQINGKUANGFENXIJISUANZHUANGCEFUMOZULIDUIJIZHUANGDEYINGXIANG;

    3 CAIYONGJITUZHUANGHEBUFENJITUZHUANGSHI,YINGCAIQUXIAOJIANKONGXISHUIYALIHEJITUXIAOYINGDEJISHUCUOSHI,BINGYINGKONGZHICHENZHUANGSULV,JIANXIAOJITUXIAOYINGDUICHENGZHUANGZHILIANG、LINJINJIANZHUWU、DAOLU、DIXIAGUANXIANHEJIKENGBIANPODENGCHANSHENGDEBULIYINGXIANG;

    4 先成桩后开挖基坑时,必须合理安排基坑挖土顺序和控制分层开挖的深度,防止土体侧移对桩的影响。
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3.4.2 湿陷性黄土地区的桩基设计原则应符合下列规定:

亚博体育彩票    1 JIZHUANGYINGCHUANTOUSHIXIANXINGHUANGTUCENG,ZHUANGDUANYINGZHICHENGZAIYASUOXINGDIDENIANXINGTU、FENTU、ZHONGMIHEMISHISHATUYIJISUISHILEITUCENGZHONG;

    2 SHIXIANXINGHUANGTUDIJIZHONG,SHEJIDENGJIWEIJIA、YIJIJIANZHUZHUANGJIDEDANZHUANGJIXIANCHENGZAILI,YIYIJINSHUIZAIHESHIYANWEIZHUYAOYIJU;

    3 自重湿陷性黄土地基中的单桩极限承载力,应根据工程具体情况分析计算桩侧负摩阻力的影响。
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3.4.3 季节性冻土和膨胀土地基中的桩基设计原则应符合下列规定:

亚博体育彩票    1 ZHUANGDUANJINRUDONGSHENXIANHUOPENGZHANGTUDEDAQIYINGXIANGJIJUCENGYIXIADESHENDU,YINGMANZUKANGBAWENDINGXINGYANSUANYAOQIU,QIEBUDEXIAOYU4BEIZHUANGJINGJI1BEIKUODADUANZHIJING,ZUIXIAOSHENDUYINGDAYU1.5m;

    2 WEIJIANXIAOHEXIAOCHUDONGZHANGHUOPENGZHANGDUIZHUANGJIDEZUOYONG,YICAIYONGZUAN(WA)KONGGUANZHUZHUANG;

亚博体育彩票    3 QUEDINGJIZHUANGSHUXIANGJIXIANCHENGZAILISHI,CHUBUJIRUDONGZHANG、PENGZHANGSHENDUFANWEINEIZHUANGCEZULIWAI,HAIYINGKAOLVDIJITUDEDONGZHANG、PENGZHANGZUOYONG,YANSUANZHUANGJIDEKANGBAWENDINGXINGHEZHUANGSHENSHOULACHENGZAILI;

    4 为消除桩基受冻胀或膨胀作用的危害,可在冻胀或膨胀深度范围内,沿桩周及承台作隔冻、隔胀处理。
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3.4.4 岩溶地区的桩基设计原则应符合下列规定:

亚博体育彩票    1 YANRONGDIQUDEZHUANGJI,YICAIYONGZUAN、CHONGKONGZHUANG;

    2 DANGDANZHUANGHEZAIJIAODA,YANCENGMAISHENJIAOQIANSHI,YICAIYONGQIANYANZHUANG;

    3 当基岩面起伏很大且埋深较大时,宜采用摩擦型灌注桩。
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3.4.5 坡地、岸边桩基的设计原则应符合下列规定:

亚博体育彩票    1 DUIJIANYUPODI、ANBIANDEZHUANGJI,BUDEJIANGZHUANGZHICHENGYUBIANPOQIANZAIDEHUADONGTISHANG。ZHUANGDUANJINRUQIANZAIHUALIEMIANYIXIAWENDINGYANTUCENGNEIDESHENDU,YINGNENGBAOZHENGZHUANGJIDEWENDING;

亚博体育彩票    2 JIANZHUZHUANGJIYUBIANPOYINGBAOCHIYIDINGDESHUIPINGJULI;JIANZHUCHANGDINEIDEBIANPOBIXUSHIWANQUANWENDINGDEBIANPO,DANGYOUBENGTA、HUAPODENGBULIANGDIZHIXIANXIANGCUNZAISHI,YINGANXIANXINGGUOJIABIAOZHUN《JIANZHUBIANPOGONGCHENGJISHUGUIFAN》GB 50330DEGUIDINGJINXINGZHENGZHI,QUEBAOQIWENDINGXING;

    3 XINJIANPODI、ANBIANJIANZHUZHUANGJIGONGCHENGYINGYUJIANZHUBIANPOGONGCHENGTONGYIGUIHUA,TONGBUSHEJI,HELIQUEDINGSHIGONGSHUNXU;

亚博体育彩票    4 BUYICAIYONGJITUZHUANG;

    5 应验算最不利荷载效应组合下桩基的整体稳定性和基桩水平承载力。
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3.4.6 抗震设防区桩基的设计原则应符合下列规定:

亚博体育彩票    1 ZHUANGJINRUYEHUATUCENGYIXIAWENDINGTUCENGDEZHANGDU(BUBAOKUOZHUANGJIANBUFEN)YINGANJISUANQUEDING;DUIYUSUISHITU,LI、CU、ZHONGSHA,MISHIFENTU,JIANYINGNIANXINGTUSHANGBUYINGXIAOYU(2~3)d,DUIQITAFEIYANSHITUSHANGBUYIXIAOYU(4~5)d;

    2 CHENGTAIHEDIXIASHICEQIANGZHOUWEIYINGCAIYONGHUITU、JIPEISHASHI、YASHIXINGJIAOHAODESUTUHUITIAN,BINGFENCENGHANGSHI,YEKECAIYONGSUHUNNINGTUHUITIANHUOJIAOBANLIUDONGXINGSHUINITUHUITIAN;

亚博体育彩票    3 DANGCHENGTAIZHOUWEIWEIKEYEHUATUHUODIJICHENGZAILITEZHENGZHIXIAOYU40kPa(HUOBUPAISHUIKANGJIANQIANGDUXIAOYU15kPa)DERUANTU,QIEZHUANGJISHUIPINGCHENGZAILIBUMANZUJISUANYAOQIUSHI,KEJIANGCHENGTAIWAIMEICE1/2CHENGTAIBIANZHANGFANWEINEIDETUJINXINGJIAGU;

    4 对于存在液化扩展的地段,应验算桩基在土流动的侧向作用力下的稳定性。
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3.4.7 可能出现负摩阻力的桩基设计原则应符合下列规定:

    1 DUIYUTIANTUJIANZHUCHANGDI,YIXIANTIANTUBINGBAOZHENGTIANTUDEMISHIXING,RUANTUCHANGDITIANTUQIANYINGCAIQUYUSHESULIAOPAISHUIBANDENGCUOSHI,DAITIANTUDIJICHENJIANGJIBENWENDINGHOUFANGKECHENGZHUANG;

亚博体育彩票    2 DUIYUYOUDIMIANDAMIANJIDUIZAIDEJIANZHUWU,YINGCAIQUJIANXIAODIMIANCHENJIANGDUIJIANZHUWUZHUANGJIYINGXIANGDECUOSHI;

亚博体育彩票    3 DUIYUZIZHONGSHIXIANXINGHUANGTUDIJI,KECAIYONGQIANGHANG、JIMITUZHUANGDENGXIANXINGCHULI,XIAOCHUSHANGBUHUOQUANBUTUDEZIZHONGSHIXIAN:DUIYUQIANGUJIETUYICAIQUXIANQIPAISHUIYUYADENGCUOSHI;

亚博体育彩票    4 DUIYUJITUCHENZHUANG,YINGCAIQUXIAOJIANCHAOKONGXISHUIYALI、KONGZHICHENZHUANGSULVDENGCUOSHI;

    5 对于中性点以上的桩身可对表面进行处理,以减少负摩阻力。
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3.4.8 抗拔桩基的设计原则应符合下列规定:

亚博体育彩票    1 YINGGENJUHUANJINGLEIBIEJISHUI、TUDUIGANGJINDEFUSHI、GANGJINZHONGLEIDUIFUSHIDEMINGANXINGHEHEZAIZUOYONGSHIJIANDENGYINSUQUEDINGKANGBAZHUANGDELIEFENGKONGZHIDENGJI;

    2 DUIYUYANGEYAOQIUBUCHUXIANLIEFENGDEYIJILIEFENGKONGZHIDENGJI,ZHUANGSHENYINGSHEZHIYUYINGLIJIN;DUIYUYIBANYAOQIUBUCHUXIANLIEFENGDEERJILIEFENGKONGZHIDENGJI,ZHUANGSHENYISHEZHIYUYINGLIJIN;

亚博体育彩票    3 DUIYUSANJILIEFENGKONGZHIDENGJI,YINGJINXINGZHUANGSHENLIEFENGKUANDUJISUAN;

    4 当基桩抗拔承载力要求较高时,可采用桩侧后注浆、扩底等技术措施。
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3.5 耐久性规定

3.5.1 ZHUANGJIJIEGOUDENAIJIUXINGYINGGENJUSHEJISHIYONGNIANXIAN、XIANXINGGUOJIABIAOZHUN《HUNNINGTUJIEGOUSHEJIGUIFAN》GB 50010DEHUANJINGLEIBIEGUIDINGYIJISHUI、TUDUIGANG、HUNNINGTUFUSHIXINGDEPINGJIAJINXINGSHEJI。

3.5.2 二类和三类环境中,设计使用年限为50年的桩基结构混凝土耐久性应符合表3.5.2的规定。

   
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3.5.3 桩身裂缝控制等级及最大裂缝宽度应根据环境类别和水土介质腐蚀性等级按表3.5.3规定选用。

   
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3.5.4 四类、五类环境桩基结构耐久性设计可按国家现行标准《港口工程混凝土结构设计规范》JTJ 267和《工业建筑防腐蚀设计规范》GB 50046等执行。

3.5.5 对三、四、五类环境桩基结构,受力钢筋宜采用环氧树脂涂层带肋钢筋。


4桩基构造

4.1 桩基构造

ⅠGUANZHUZHUANG

4.1.1 灌注桩应按下列规定配筋:

亚博体育彩票    1 PEIJINLV:DANGZHUANGSHENZHIJINGWEI300~2000mmSHI,ZHENGJIEMIANPEIJINLVKEQU0.65%~0.2%(XIAOZHIJINGZHUANGQUGAOZHI);DUISHOUHEZAITEBIEDADEZHUANG、KANGBAZHUANGHEQIANYANDUANCHENGZHUANGYINGGENJUJISUANQUEDINGPEIJINLV,BINGBUYINGXIAOYUSHANGSHUGUIDINGZHI;

    2 PEIJINZHANGDU:

        1) DUANCHENGXINGZHUANGHEWEIYUPODI、ANBIANDEJIZHUANGYINGYANZHUANGSHENDENGJIEMIANHUOBIANJIEMIANTONGZHANGPEIJIN;

        2) MOCAXINGGUANZHUZHUANGPEIJINZHANGDUBUYINGXIAOYU2/3ZHUANGZHANG;DANGSHOUSHUIPINGHEZAISHI,PEIJINZHANGDUSHANGBUYIXIAOYU4.0/α(αWEIZHUANGDESHUIPINGBIANXINGXISHU);

亚博体育彩票        3) DUIYUSHOUDIZHENZUOYONGDEJIZHUANG,ZHUANGSHENPEIJINZHANGDUYINGCHUANGUOKEYEHUATUCENGHERUANRUOTUCENG,JINRUWENDINGTUCENGDESHENDUBUYINGXIAOYUBENGUIFANDI3.4.6TIAODEGUIDING;

亚博体育彩票        4) SHOUFUMOZULIDEZHUANG、YINXIANCHENGZHUANGHOUKAIWAJIKENGERSUIDIJITUHUIDANDEZHUANG,QIPEIJINZHANGDUYINGCHUANGUORUANRUOTUCENGBINGJINRUWENDINGTUCENG,JINRUDESHENDUBUYINGXIAOYU(2~3)d;

        5) KANGBAZHUANGJIYINDIZHENZUOYONG、DONGZHANGHUOPENGZHANGLIZUOYONGERSHOUBALIDEZHUANG,YINGDENGJIEMIANHUOBIANJIEMIANTONGZHANGPEIJIN。

亚博体育彩票    3 DUIYUSHOUSHUIPINGHEZAIDEZHUANG,ZHUJINBUYINGXIAOYU8ф12;DUIYUKANGYAZHUANGHEKANGBAZHUANG,ZHUJINBUYINGSHAOYU6ф10;ZONGXIANGZHUJINYINGYANZHUANGSHENZHOUBIANJUNYUNBUZHI,QIJINGJUBUYINGXIAOYU60mm;

    4 箍筋应采用螺旋式,直径不应小于6mm,间距宜为200~300mm;受水平荷载较大的桩基、承受水平地震作用的桩基以及考虑主筋作用计算桩身受压承载力时,桩顶以下5d范围内的箍筋应加密,间距不应大于100mm;当桩身位于液化土层范围内时箍筋应加密;当考虑箍筋受力作用时,箍筋配置应符合现行国家标准《混凝土结构设计规范》GB 50010的有关规定;当钢筋笼长度超过4m时,应每隔2m设一道直径不小于12mm的焊接加劲箍筋。
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4.1.2 桩身混凝土及混凝土保护层厚度应符合下列要求:

亚博体育彩票    1 ZHUANGSHENHUNNINGTUQIANGDUDENGJIBUDEXIAOYUC25,HUNNINGTUYUZHIZHUANGJIANQIANGDUDENGJIBUDEXIAOYUC30;

    2 GUANZHUZHUANGZHUJINDEHUNNINGTUBAOHUCENGHOUDUBUYINGXIAOYU35mm,SHUIXIAGUANZHUZHUANGDEZHUJINHUNNINGTUBAOHUCENGHOUDUBUDEXIAOYU50mm;

    3 四类、五类环境中桩身混凝土保护层厚度应符合国家现行标准《港口工程混凝土结构设计规范》JTJ 267、《工业建筑防腐蚀设计规范》GB 50046的相关规定。
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4.1.3 扩底灌注桩扩底端尺寸应符合下列规定(见图4.1.3):

亚博体育彩票    1 DUIYUCHILICENGCHENGZAILIJIAOGAO、SHANGFUTUCENGJIAOCHADEKANGYAZHUANGHEZHUANGDUANYISHANGYOUYIDINGHOUDUJIAOHAOTUCENGDEKANGBAZHUANG,KECAIYONGKUODI;KUODIDUANZHIJINGYUZHUANGSHENZHIJINGZHIBID/d,YINGGENJUCHENGZAILIYAOQIUJIKUODIDUANCEMIANHEZHUANGDUANCHILICENGTUXINGTEZHENGYIJIKUODISHIGONGFANGFAQUEDING,WAKONGZHUANGDED/dBUYINGDAYU3,ZUANKONGZHUANGDED/dBUYINGDAYU2.5;

    2 KUODIDUANCEMIANDEXIELVYINGGENJUSHIJICHENGKONGJITUTIZILITIAOJIANQUEDING,a/hcKEQU1/4~1/2,SHATUKEQU1/4,FENTU、NIANXINGTUKEQU1/3~1/2;

    3 KANGYAZHUANGKUODIDUANDIMIANYICHENGGUODIXING,SHIGAOhbKEQU(0.15~0.20)D。

ⅡHUNNINGTUYUZHIZHUANG

亚博体育彩票4.1.4 HUNNINGTUYUZHIZHUANGDEJIEMIANBIANZHANGBUYINGXIAOYU200mm;YUYINGLIHUNNINGTUYUZHISHIXINZHUANGDEJIEMIANBIANZHANGBUYIXIAOYU350mm。

4.1.5 预制桩的混凝土强度等级不宜低于C30;预应力混凝土实心桩的混凝土强度等级不应低于C40;预制桩纵向钢筋的混凝土保护层厚度不宜小于30mm。

4.1.6 预制桩的桩身配筋应按吊运、打桩及桩在使用中的受力等条件计算确定。采用锤击法沉桩时,预制桩的最小配筋率不宜小于0.8%。静压法沉桩时,最小配筋率不宜小于0.6%,主筋直径不宜小于14mm,打入桩桩顶以下(4~5)d长度范围内箍筋应加密,并设置钢筋网片。

4.1.7 预制桩的分节长度应根据施工条件及运输条件确定;每根桩的接头数量不宜超过3个。

4.1.8 预制桩的桩尖可将主筋合拢焊在桩尖辅助钢筋上,对于持力层为密实砂和碎石类土时,宜在桩尖处包以钢钣桩靴,加强桩尖。

ⅢYUYINGLIHUNNINGTUKONGXINZHUANG

4.1.9 YUYINGLIHUNNINGTUKONGXINZHUANGANJIEMIANXINGSHIKEFENWEIGUANZHUANG、KONGXINFANGZHUANG;ANHUNNINGTUQIANGDUDENGJIKEFENWEIYUYINGLIGAOQIANGHUNNINGTUGUANZHUANG(PHC)HEKONGXINFANGZHUANG(PHS)、YUYINGLIHUNNINGTUGUANZHUANG(PC)HEKONGXINFANGZHUANG(PS)。

    LIXINCHENGXINGDEXIANZHANGFAYUYINGLIHUNNINGTUZHUANGDEJIEMIANCHICUN、PEIJIN、ZHUANGSHENJIXIANWANJU、ZHUANGSHENSHUXIANGSHOUYACHENGZAILISHEJIZHIDENGCANSHUKEANBENGUIFANFULUBQUEDING。

4.1.10 预应力混凝土空心桩桩尖形式宜根据地层性质选择闭口形或敞口形;闭口形分为平底十字形和锥形。

4.1.11 预应力混凝土空心桩质量要求,尚应符合国家现行标准《先张法预应力混凝土管桩》GB 13476和《预应力混凝土空心方桩》JG 197及其他的有关标准规定。

4.1.12 预应力混凝土桩的连接可采用端板焊接连接、法兰连接、机械啮合连接、螺纹连接。每根桩的接头数量不宜超过3个。

4.1.13 桩端嵌入遇水易软化的强风化岩、全风化岩和非饱和土的预应力混凝土空心桩,沉桩后,应对桩端以上约2m范围内采取有效的防渗措施,可采用微膨胀混凝土填芯或在内壁预涂柔性防水材料。
▼ 展开条文说明

ⅣGANGZHUANG

4.1.14 GANGZHUANGKECAIYONGGUANXING、HXINGHUOQITAYIXINGGANGCAI。

4.1.15 钢桩的分段长度宜为12~15m。

4.1.16 钢桩焊接接头应采用等强度连接。

4.1.17 钢桩的端部形式,应根据桩所穿越的土层、桩端持力层性质、桩的尺寸、挤土效应等因素综合考虑确定,并可按下列规定采用:

    1 GANGGUANZHUANGKECAIYONGXIALIEZHUANGDUANXINGSHI:

        1) CHANGKOU:

        DAIJIAQIANGGU(DAINEIGEBAN、BUDAINEIGEBAN);BUDAIJIAQIANGGU(DAINEIGEBAN、BUDAINEIGEBAN)。

        2) BIKOU:

        PINGDI;ZHUIDI。

    2 HXINGGANGZHUANGKECAIYONGXIALIEZHUANGDUANXINGSHI: 

        1) DAIDUANBAN;

亚博体育彩票        2) BUDAIDUANBAN:

        ZHUIDI;

        PINGDI(DAIKUODAYI、BUDAIKUODAYI)。

4.1.18 钢桩的防腐处理应符合下列规定:

    1 GANGZHUANGDEFUSHISULVDANGWUSHICEZILIAOSHIKEANBIAO4.1.18QUEDING;

    2 GANGZHUANGFANGFUCHULIKECAIYONGWAIBIAOMIANTUFANGFUCENG、ZENGJIAFUSHIYULIANGJIYINJIBAOHU;DANGGANGGUANZHUANGNEIBITONGWAIJIEGEJUESHI,KEBUKAOLVNEIBIFANGFU。


4.2 承台构造

亚博体育彩票4.2.1 ZHUANGJICHENGTAIDEGOUZAO,CHUYINGMANZUKANGCHONGQIE、KANGJIANQIE、KANGWANCHENGZAILIHESHANGBUJIEGOUYAOQIUWAI,SHANGYINGFUHEXIALIEYAOQIU:

    1 ZHUXIADULIZHUANGJICHENGTAIDEZUIXIAOKUANDUBUYINGXIAOYU500mm,BIANZHUANGZHONGXINZHICHENGTAIBIANYUANDEJULIBUYINGXIAOYUZHUANGDEZHIJINGHUOBIANZHANG,QIEZHUANGDEWAIBIANYUANZHICHENGTAIBIANYUANDEJULIBUYINGXIAOYU150mm。DUIYUQIANGXIATIAOXINGCHENGTAILIANG,ZHUANGDEWAIBIANYUANZHICHENGTAILIANGBIANYUANDEJULIBUYINGXIAOYU75mm。CHENGTAIDEZUIXIAOHOUDUBUYINGXIAOYU300mm。

    2 GAOCENGJIANZHUPINGBANSHIHELIANGBANSHIFAXINGCHENGTAIDEZUIXIAOHOUDUBUYINGXIAOYU400mm,DUOCENGJIANZHUQIANGXIABUZHUANGDEJIANLIQIANGJIEGOUFAXINGCHENGTAIDEZUIXIAOHOUDUBUYINGXIAOYU200mm。 

    3 高层建筑箱形承台的构造应符合《高层建筑筏形与箱形基础技术规范》JGJ 6的规定。
▼ 展开条文说明

4.2.2 承台混凝土材料及其强度等级应符合结构混凝土耐久性的要求和抗渗要求。
▼ 展开条文说明

4.2.3 承台的钢筋配置应符合下列规定:

    1 ZHUXIADULIZHUANGJICHENGTAIGANGJINYINGTONGZHANGPEIZHI[JIANTU4.2.3(a)],DUISIZHUANGYISHANG(HANSIZHUANG)CHENGTAIYIANSHUANGXIANGJUNYUNBUZHI,DUISANZHUANGDESANJIAOXINGCHENGTAIYINGANSANXIANGBANDAIJUNYUNBUZHI,QIEZUILIMIANDESANGENGANGJINWEICHENGDESANJIAOXINGYINGZAIZHUJIEMIANFANWEINEI[JIANTU4.2.3(b)]。GANGJINMAOGUZHANGDUZIBIANZHUANGNEICE(DANGWEIYUANZHUANGSHI,YINGJIANGQIZHIJINGCHENGYI0.8DENGXIAOWEIFANGZHUANG)SUANQI,BUYINGXIAOYU35dg(dgWEIGANGJINZHIJING);DANGBUMANZUSHIYINGJIANGGANGJINXIANGSHANGWANZHE,CISHISHUIPINGDUANDEZHANGDUBUYINGXIAOYU25dg,WANZHEDUANZHANGDUBUYINGXIAOYU10dg。CHENGTAIZONGXIANGSHOULIGANGJINDEZHIJINGBUYINGXIAOYU12mm,JIANJUBUYINGDAYU200mm。ZHUXIADULIZHUANGJICHENGTAIDEZUIXIAOPEIJINLVBUYINGXIAOYU0.15%。

    2 柱下独立两桩承台,应按现行国家标准《混凝土结构设计规范》GB 50010中的深受弯构件配置纵向受拉钢筋、水平及竖向分布钢筋。承台纵向受力钢筋端部的锚固长度及构造应与柱下多桩承台的规定相同。    
   

    3 TIAOXINGCHENGTAILIANGDEZONGXIANGZHUJINYINGFUHEXIANXINGGUOJIABIAOZHUN《HUNNINGTUJIEGOUSHEJIGUIFAN》GB 50010GUANYUZUIXIAOPEIJINLVDEGUIDING,ZHUJINZHIJINGBUYINGXIAOYU12mm,JIALIJINZHIJINGBUYINGXIAOYU10mm,GUJINZHIJINGBUYINGXIAOYU6mm(TU4.2.3-C)。

    4 FAXINGCHENGTAIBANHUOXIANGXINGCHENGTAIBANZAIJISUANZHONGDANGJINKAOLVJUBUWANJUZUOYONGSHI,KAOLVDAOZHENGTIWANQUDEYINGXIANG,ZAIZONGHENGLIANGGEFANGXIANGDEXIACENGGANGJINPEIJINLVBUYIXIAOYU0.15%;SHANGCENGGANGJINYINGANJISUANPEIJINLVQUANBULIANTONG。DANGFABANDEHOUDUDAYU2000mmSHI,YIZAIBANHOUZHONGJIANBUWEISHEZHIZHIJINGBUXIAOYU12mm、JIANJUBUDAYU300mmDESHUANGXIANGGANGJINWANG。

    5 承台底面钢筋的混凝土保护层厚度,当有混凝土垫层时,不应小于50mm,无垫层时不应小于70mm;此外尚不应小于桩头嵌入承台内的长度。
▼ 展开条文说明

4.2.4 桩与承台的连接构造应符合下列规定:

    1 ZHUANGQIANRUCHENGTAINEIDEZHANGDUDUIZHONGDENGZHIJINGZHUANGBUYIXIAOYU50mm;DUIDAZHIJINGZHUANGBUYIXIAOYU100mm。

    2 HUNNINGTUZHUANGDEZHUANGDINGZONGXIANGZHUJINYINGMAORUCHENGTAINEI,QIMAORUZHANGDUBUYIXIAOYU35BEIZONGXIANGZHUJINZHIJING。DUIYUKANGBAZHUANG,ZHUANGDINGZONGXIANGZHUJINDEMAOGUZHANGDUYINGANXIANXINGGUOJIABIAOZHUN《HUNNINGTUJIEGOUSHEJIGUIFAN》GB 50010QUEDING。

    3 对于大直径灌注桩,当采用一柱一桩时可设置承台或将桩与柱直接连接。
▼ 展开条文说明

4.2.5 柱与承台的连接构造应符合下列规定:

    1 DUIYUYIZHUYIZHUANGJICHU,ZHUYUZHUANGZHIJIELIANJIESHI,ZHUZONGXIANGZHUJINMAORUZHUANGSHENNEIZHANGDUBUYINGXIAOYU35BEIZONGXIANGZHUJINZHIJING。

亚博体育彩票    2 DUIYUDUOZHUANGCHENGTAI,ZHUZONGXIANGZHUJINYINGMAORUCHENGTAIBUXIAOYU35BEIZONGXIANGZHUJINZHIJING;DANGCHENGTAIGAODUBUMANZUMAOGUYAOQIUSHI,SHUXIANGMAOGUZHANGDUBUYINGXIAOYU20BEIZONGXIANGZHUJINZHIJING,BINGXIANGZHUZHOUXIANFANGXIANGCHENG90°WANZHE。

亚博体育彩票    3 DANGYOUKANGZHENSHEFANGYAOQIUSHI,DUIYUYI、ERJIKANGZHENDENGJIDEZHU,ZONGXIANGZHUJINMAOGUZHANGDUYINGCHENGYI1.15DEXISHU;DUIYUSANJIKANGZHENDENGJIDEZHU,ZONGXIANGZHUJINMAOGUZHANGDUYINGCHENGYI1.05DEXISHU。

4.2.6 承台与承台之间的连接构造应符合下列规定:

亚博体育彩票    1 YIZHUYIZHUANGSHI,YINGZAIZHUANGDINGLIANGGEZHUZHOUFANGXIANGSHANGSHEZHILIANXILIANG。DANGZHUANGYUZHUDEJIEMIANZHIJINGZHIBIDAYU2SHI,KEBUSHELIANXILIANG。

    2 LIANGZHUANGZHUANGJIDECHENGTAI,YINGZAIQIDUANXIANGSHEZHILIANXILIANG。

亚博体育彩票    3 YOUKANGZHENSHEFANGYAOQIUDEZHUXIAZHUANGJICHENGTAI,YIYANLIANGGEZHUZHOUFANGXIANGSHEZHILIANXILIANG。

    4 LIANXILIANGDINGMIANYIYUCHENGTAIDINGMIANWEIYUTONGYIBIAOGAO。LIANXILIANGKUANDUBUYIXIAOYU250mm,QIGAODUKEQUCHENGTAIZHONGXINJUDE1/10~1/15,QIEBUYIXIAOYU400mm。

    5 连系梁配筋应按计算确定,梁上下部配筋不宜小于2根直径12mm钢筋;位于同一轴线上的相邻跨连系梁纵筋应连通。
▼ 展开条文说明

4.2.7 承台和地下室外墙与基坑侧壁间隙应灌注素混凝土或搅拌流动性水泥土,或采用灰土、级配砂石、压实性较好的素土分层夯实,其压实系数不宜小于0.94。
▼ 展开条文说明


5桩基计算

5.1 桩顶作用效应计算

5.1.1 DUIYUYIBANJIANZHUWUHESHOUSHUIPINGLI(BAOKUOLIJUYUSHUIPINGJIANLI)JIAOXIAODEGAOCENGJIANZHUQUNZHUANGJICHU,YINGANXIALIEGONGSHIJISUANZHU、QIANG、HEXINTONGQUNZHUANGZHONGJIZHUANGHUOFUHEJIZHUANGDEZHUANGDINGZUOYONGXIAOYING:

    1 SHUXIANGLI

    ZHOUXINSHUXIANGLIZUOYONGXIA

 

 


▼ 展开条文说明

5.1.2 对于主要承受竖向荷载的抗震设防区低承台桩基,在同时满足下列条件时,桩顶作用效应计算可不考虑地震作用;

    1 ANXIANXINGGUOJIABIAOZHUN《JIANZHUKANGZHENSHEJIGUIFAN》GB 50011GUIDINGKEBUJINXINGZHUANGJIKANGZHENCHENGZAILIYANSUANDEJIANZHUWU;

    2 JIANZHUCHANGDIWEIYUJIANZHUKANGZHENDEYOULIDIDUAN。

5.1.3 属于下列情况之一的桩基,计算各基桩的作用效应、桩身内力和位移时,宜考虑承台(包括地下墙体)与基桩协同工作和土的弹性抗力作用,其计算方法可按本规范附录C进行:

    1 WEIYU8DUHE8DUYISHANGKANGZHENSHEFANGQUDEJIANZHU,DANGQIZHUANGJICHENGTAIGANGDUJIAODAHUOYOUYUSHANGBUJIEGOUYUCHENGTAIXIETONGZUOYONGNENGZENGQIANGCHENGTAIDEGANGDUSHI;

    2 其他受较大水平力的桩基。
▼ 展开条文说明


5.2 桩基竖向承载力计算


▼ 展开条文说明

5.2.3 DUIYUDUANCHENGXINGZHUANGJI、ZHUANGSHUSHAOYU4GENDEMOCAXINGZHUXIADULIZHUANGJI、HUOYOUYUDICENGTUXING、SHIYONGTIAOJIANDENGYINSUBUYIKAOLVCHENGTAIXIAOYINGSHI,JIZHUANGSHUXIANGCHENGZAILITEZHENGZHIYINGQUDANZHUANGSHUXIANGCHENGZAILITEZHENGZHI。

5.2.4 对于符合下列条件之一的摩擦型桩基,宜考虑承台效应确定其复合基桩的竖向承载力特征值:

亚博体育彩票    1 SHANGBUJIEGOUZHENGTIGANGDUJIAOHAO、TIXINGJIANDANDEJIAN(GOU)ZHUWU;

亚博体育彩票    2 DUICHAYICHENJIANGSHIYINGXINGJIAOQIANGDEPAIJIAJIEGOUHEROUXINGGOUZHUWU;

亚博体育彩票    3 ANBIANGANGDUDIAOPINGYUANZESHEJIDEZHUANGJIGANGDUXIANGDUIRUOHUAQU;

    4 软土地基的减沉复合疏桩基础。
▼ 展开条文说明

5.2.5 考虑承台效应的复合基桩竖向承载力特征值可按下列公式确定: 

当承台底为可液化土、湿陷性土、高灵敏度软土、欠固结土、新填土时,沉桩引起超孔隙水压力和土体隆起时,不考虑承台效应,取ηc=0。


▼ 展开条文说明

5.3 单桩竖向极限承载力

Ⅰ一般规定

5.3.1 设计采用的单桩竖向极限承载力标准值应符合下列规定;

亚博体育彩票    1 SHEJIDENGJIWEIJIAJIDEJIANZHUZHUANGJI,YINGTONGGUODANZHUANGJINGZAISHIYANQUEDING;

    2 SHEJIDENGJIWEIYIJIDEJIANZHUZHUANGJI,DANGDIZHITIAOJIANJIANDANSHI,KECANZHAODIZHITIAOJIANXIANGTONGDESHIZHUANGZILIAO,JIEHEJINGLICHUTANDENGYUANWEICESHIHEJINGYANCANSHUZONGHEQUEDING;QIYUJUNYINGTONGGUODANZHUANGJINGZAISHIYANQUEDING;

    3 设计等级为丙级的建筑桩基,可根据原位测试和经验参数确定。
▼ 展开条文说明

5.3.2 单桩竖向极限承载力标准值、极限侧阻力标准值和极限端阻力标准值应按下列规定确定;

亚博体育彩票    1 DANZHUANGSHUXIANGJINGZAISHIYANYINGANXIANXINGXINGYEBIAOZHUN《JIANZHUJIZHUANGJIANCEJISHUGUIFAN》JGJ 106ZHIXING;

    2 DUIYUDAZHIJINGDUANCHENGXINGZHUANG,YEKETONGGUOSHENCENGPINGBAN(PINGBANZHIJINGYINGYUKONGJINGYIZHI)ZAIHESHIYANQUEDINGJIXIANDUANZULI;

    3 DUIYUQIANYANZHUANG,KETONGGUOZHIJINGWEI0.3mYANJIPINGBANZAIHESHIYANQUEDINGJIXIANDUANZULIBIAOZHUNZHI,YEKETONGGUOZHIJINGWEI0.3mQIANYANDUANDUNZAIHESHIYANQUEDINGJIXIANCEZULIBIAOZHUNZHIHEJIXIANDUANZULIBIAOZHUNZHI;

    4 桩的极限侧阻力标准值和极限端阻力标准值宜通过埋设桩身轴力测试元件由静载试验确定。并通过测试结果建立极限侧阻力标准值和极限端阻力标准值与土层物理指标、岩石饱和单轴抗压强度以及与静力触探等土的原位测试指标间的经验关系,以经验参数法确定单桩竖向极限承载力。
▼ 展开条文说明

Ⅱ原位测试法

5.3.3 当根据单桥探头静力触探资料确定混凝土预制桩单桩竖向极限承载力标准值时,如无当地经验,可按下式计算:

                                

ⅤHUNNINGTUKONGXINZHUANG

5.3.8 当根据土的物理指标与承载力参数之间的经验关系确定敞口预应力混凝土空心桩单桩竖向极限承载力标准值时,可按下列公式计算:

        
▼ 展开条文说明

5.3.11 后注浆钢导管注浆后可等效替代纵向主筋。
▼ 展开条文说明

ⅧYEHUAXIAOYING

5.3.12 对于桩身周围有液化土层的低承台桩基,在承台底面上下分别有厚度不小于1.5m、1.0m的非液化土或非软弱土层时,可将液化土层极限侧阻力乘以土层液化影响折减系数计算单桩极限承载力标准值。土层液化影响折减系数ψl可按表5.3.12确定。

当承台底面上下非液化土层厚度小于以上规定时,土层液化影响折减系数ψl取0。


5.4 特殊条件下桩基竖向承载力验算


 


Ⅰ软弱下卧层验算

5.4.1 DUIYUZHUANGJUBUCHAOGUO6dDEQUNZHUANGJICHU,ZHUANGDUANCHILICENGXIACUNZAICHENGZAILIDIYUZHUANGDUANCHILICENGCHENGZAILI1/3DERUANRUOXIAWOCENGSHI,KEANXIALIEGONGSHIYANSUANRUANRUOXIAWOCENGDECHENGZAILI(JIANTU5.4.1):

    
▼ 展开条文说明

ⅡFUMOCALIJISUAN

5.4.2 符合下列条件之一的桩基,当桩周土层产生的沉降超过基桩的沉降时,在计算基桩承载力时应计入桩侧负摩阻力:

    1 ZHUANGCHUANYUEJIAOHOUSONGSANTIANTU、ZIZHONGSHIXIANXINGHUANGTU、QIANGUJIETU、YEHUATUCENGJINRUXIANGDUIJIAOYINGTUCENGSHI;

    2 ZHUANGZHOUCUNZAIRUANRUOTUCENG,LINJINZHUANGCEDIMIANCHENGSHOUJUBUJIAODADEZHANGQIHEZAI,HUODIMIANDAMIANJIDUIZAI(BAOKUOTIANTU)SHI;

    3 由于降低地下水位,使桩周土有效应力增大,并产生显著压缩沉降时。

5.4.3 桩周土沉降可能引起桩侧负摩阻力时,应根据工程具体情况考虑负摩阻力对桩基承载力和沉降的影响;当缺乏可参照的工程经验时,可按下列规定验算。

    1 DUIYUMOCAXINGJIZHUANGKEQUZHUANGSHENJISUANZHONGXINGDIANYISHANGCEZULIWEILING,BINGKEANXIASHIYANSUANJIZHUANGCHENGZAILI:


▼ 展开条文说明
                   

亚博体育彩票5.4.8 PENGZHANGTUSHANGQINGXINGJIANZHUDEDUANZHUANGJICHU,YINGANXIALIEGONGSHIYANSUANQUNZHUANGJICHUCHENGZHENGTIPOHUAIHEFEIZHENGTIPOHUAIDEKANGBAWENDINGXING:

5.5 桩基沉降计算

5.5.1 建筑桩基沉降变形计算值不应大于桩基沉降变形允许值。

5.5.2 桩基沉降变形可用下列指标表示:

    1 CHENJIANGLIANG;

    2 CHENJIANGCHA;

亚博体育彩票    3 ZHENGTIQINGXIE:JIANZHUWUZHUANGJICHUQINGXIEFANGXIANGLIANGDUANDIANDECHENJIANGCHAYUQIJULIZHIBIZHI;

    4 JUBUQINGXIE:QIANGXIATIAOXINGCHENGTAIYANZONGXIANGMOUYIZHANGDUFANWEINEIZHUANGJICHULIANGDIANDECHENJIANGCHAYUQIJULIZHIBIZHI。

5.5.3 计算桩基沉降变形时,桩基变形指标应按下列规定选用:

    1 YOUYUTUCENGHOUDUYUXINGZHIBUJUNYUN、HEZAICHAYI、TIXINGFUZA、XIANGHUYINGXIANGDENGYINSUYINQIDEDIJICHENJIANGBIANXING,DUIYUQITICHENGZHONGJIEGOUYINGYOUJUBUQINGXIEKONGZHI;

亚博体育彩票    2 DUIYUDUOCENGHUOGAOCENGJIANZHUHEGAOSONGJIEGOUYINGYOUZHENGTIQINGXIEZHIKONGZHI;

    3 DANGQIJIEGOUWEIKUANGJIA、KUANGJIA-JIANLIQIANG、KUANGJIA-HEXINTONGJIEGOUSHI,SHANGYINGKONGZHIZHU(QIANG)ZHIJIANDECHAYICHENJIANG。

5.5.5 对于本规范表5.5.4中未包括的建筑桩基沉降变形允许值,应根据上部结构对桩基沉降变形的适应能力和使用要求确定。

Ⅰ桩中心距不大于6倍桩径的桩基

5.5.6 对于桩中心距不大于6倍桩径的桩基,其最终沉降量计算可采用等效作用分层总和法。等效作用面位于桩端平面,等效作用面积为桩承台投影面积,等效作用附加压力近似取承台底平均附加压力。等效作用面以下的应力分布采用各向同性均质直线变形体理论。计算模式如图5.5.6所示,桩基任一点最终沉降量


▼ 展开条文说明
       
▼ 展开条文说明

5.5.12 计算桩基沉降时,应考虑相邻基础的影响,采用叠加原理计算;桩基等效沉降系数可按独立基础计算。

5.5.13 当桩基形状不规则时,可采用等效矩形面积计算桩基等效沉降系数,等效矩形的长宽比可根据承台实际尺寸和形状确定。

Ⅱ单桩、单排桩、疏桩基础

5.5.14 对于单桩、单排桩、桩中心距大于6倍桩径的疏桩基础的沉降计算应符合下列规定:

亚博体育彩票    1 CHENGTAIDIDIJITUBUFENDANHEZAIDEZHUANGJI。ZHUANGDUANPINGMIANYIXIADIJIZHONGYOUJIZHUANGYINQIDEFUJIAYINGLI,ANKAOLVZHUANGJINGYINGXIANGDEMINGDELIN(Mindlin)JIEFULUFJISUANQUEDING。JIANGCHENJIANGJISUANDIANSHUIPINGMIANYINGXIANGFANWEINEIGEJIZHUANGDUIYINGLIJISUANDIANCHANSHENGDEFUJIAYINGLIDIEJIA,CAIYONGDANXIANGYASUOFENCENGZONGHEFAJISUANTUCENGDECHENJIANG,BINGJIRUZHUANGSHENYASUOse。ZHUANGJIDEZUIZHONGCHENJIANGLIANGKEANXIALIEGONGSHIJISUAN:

 

 

 


▼ 展开条文说明


5.6 软土地基减沉复合疏桩基础



5.6.1 当软土地基上多层建筑,地基承载力基本满足要求(以底层平面面积计算)时,可设置穿过软土层进入相对较好土层的疏布摩擦型桩,由桩和桩间土共同分担荷载。该种减沉符合疏桩基础,可按下列公式确定承台面积和桩数:


▼ 展开条文说明

5.6.2 减沉复合疏桩基础中点沉降可按下列公式计算:

 


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5.7 桩基水平承载力与位移计算


Ⅰ单桩基础

5.7.1 受水平荷载的一般建筑物和水平荷载较小的高大建筑物单桩基础和群桩中基桩应满足下式要求:

5.7.2 单桩的水平承载力特征值的确定应符合下列规定:
▼ 展开条文说明

    1 DUIYUSHOUSHUIPINGHEZAIJIAODADESHEJIDENGJIWEIJIAJI、YIJIDEJIANZHUZHUANGJI,DANZHUANGSHUIPINGCHENGZAILITEZHENGZHIYINGTONGGUODANZHUANGSHUIPINGJINGZAISHIYANQUEDING,SHIYANFANGFAKEANXIANXINGXINGYEBIAOZHUN《JIANZHUJIZHUANGJIANCEJISHUGUIFAN》JGJ 106ZHIXING。

亚博体育彩票    2 DUIYUGANGJINHUNNINGTUYUZHIZHUANG、GANGZHUANG、ZHUANGSHENPEIJINLVBUXIAOYU0.65%DEGUANZHUZHUANG,KEGENJUJINGZAISHIYANJIEGUOQUDIMIANCHUSHUIPINGWEIYIWEI10mm(DUIYUSHUIPINGWEIYIMINGANDEJIANZHUWUQUSHUIPINGWEIYI6mm)SUODUIYINGDEHEZAIDE75%WEIDANZHUANGSHUIPINGCHENGZAILITEZHENGZHI。

    3 DUIYUZHUANGSHENPEIJINLVXIAOYU0.65%DEGUANZHUZHUANG,KEQUDANZHUANGSHUIPINGJINGZAISHIYANDELINJIEHEZAIDE75%WEIDANZHUANGSHUIPINGCHENGZAILITEZHENGZHI。

    4 DANGQUESHAODANZHUANGSHUIPINGJINGZAISHIYANZILIAOSHI,KEANXIALIEGONGSHIGUSUANZHUANGSHENPEIJINLVXIAOYU0.65%DEGUANZHUZHUDEDANZHUANGSHUIPINGCHENGZAILIDETEZHENGZHI:

 

 

 

 

5.7.4 JISUANSHUIPINGHEZAIJIAODAHESHUIPINGDIZHENZUOYONG、FENGZAIZUOYONGDEDAIDIXIASHIDEGAODAJIANZHUWUZHUANGJIDESHUIPINGWEIYISHI,KEKAOLVDIXIASHICEQIANG、CHENGTAI、ZHUANGQUN、TUGONGTONGZUOYONG,ANBENGUIFANFULUCFANGFAJISUANJIZHUANGNEILIHEBIANWEI,YUSHUIPINGWAILIZUOYONGPINGMIANXIANGCHUIZHIDEDANPAIZHUANGJICHUKEANBENGUIFANFULUCZHONGBIAOC.0.3-1JISUAN。

5.7.5 桩的水平变形系数和地基土水平抗力系数的比例系数m可按下列规定确定:

    1 ZHUANGDESHUIPINGBIANXINGXISHUa(1/m)

    2 地基土水平抗力系数的比例系数m,宜通过单桩水平静载试验确定,当无静载试验资料时,可按表5.7.5取值。


▼ 展开条文说明

5.8 桩身承载力与裂缝控制计算

5.8.1 桩身应进行承载力和裂缝控制计算。计算时应考虑桩身材料强度、成桩工艺、吊运与沉桩、约束条件、环境类别等因素,除按本节有关规定执行外,尚应符合现行国家标准《混凝土结构设计规范》GB 50010、《钢结构设计规范》GB 50017和《建筑抗震设计规范》GB 50011的有关规定。

Ⅰ受压桩

5.8.2 钢筋混凝土轴心受压桩正截面受压承载力应符合下列规定:

    1 DANGZHUANGDINGYIXIA5dFANWEIDEZHUANGSHENLUOXUANSHIGUJINJIANJUBUDAYU100mm,QIEFUHEBENGUIFANDI4.1.1TIAOGUIDINGSHI:


▼ 展开条文说明

5.8.4 计算轴心受压混凝土桩正截面受压承载力时,一般取稳定系数φ=1.0。对于高承台基桩、桩身穿越可液化土或不排水抗剪强度小于10kPa的软弱土层的基桩,应考虑压屈影响,可按本规范式(5.8.2-1)、式(5.8.2-2)计算所得桩身正截面受压承载力乘以φ折减。其稳定系数φ可根据桩身压屈计算长度lc和桩的设计直径d(或矩形桩短边尺寸6)确定。桩身压屈计算长度可根据桩顶的约束情况、桩身露出地面的自由长度l0、桩的入土长度h 、桩侧和桩底的土质条件按表5.8.4-1确定。桩的稳定系数φ可按表5.8.4-2确定。
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Ⅱ 抗拔桩

5.8.7 钢筋混凝土轴心抗拔桩的正截面受拉承载力应符合下式规定:


▼ 展开条文说明

5.8.9 当考虑地震作用验算桩身抗拔承载力时,应根据现行国家标准《建筑抗震设计规范》GB 50011的规定,对作用于桩顶的地震作用效应进行调整。

Ⅲ受水平作用桩

5.8.10 对于受水平荷载和地震作用的桩,其桩身受弯承载力和受剪承载力的验算应符合下列规定:

    1 DUIYUZHUANGDINGGUDUANDEZHUANG,YINGYANSUANZHUANGDINGZHENGJIEMIANWANJU;DUIYUZHUANGDINGZIYOUHUOJIAOJIEDEZHUANG,YINGYANSUANZHUANGSHENZUIDAWANJUJIEMIANCHUDEZHENGJIEMIANWANJU;

    2 YINGYANSUANZHUANGDINGXIEJIEMIANDESHOUJIANCHENGZAILI;

亚博体育彩票    3 ZHUANGSHENSUOCHENGSHOUZUIDAWANJUHESHUIPINGJIANLIDEJISUAN,KEANBENGUIFANFULUCJISUAN;

亚博体育彩票    4 ZHUANGSHENZHENGJIEMIANSHOUWANCHENGZAILIHEXIEJIEMIANSHOUJIANCHENGZAILI,YINGANXIANXINGGUOJIABIAOZHUN《HUNNINGTUJIEGOUSHEJIGUIFAN》GB 50010ZHIXING;

    5 DANGKAOLVDIZHENZUOYONGYANSUANZHUANGSHENZHENGJIEMIANSHOUWANHEXIEJIEMIANSHOUJIANCHENGZAILISHI,YINGGENJUXIANXINGGUOJIABIAOZHUN《JIANZHUKANGZHENSHEJIGUIFAN》GB 50011DEGUIDING,DUIZUOYONGYUZHUANGDINGDEDIZHENZUOYONGXIAOYINGJINXINGDIAOZHENG。 

Ⅳ预制桩吊运和锤击验算
▼ 展开条文说明

5.8.11 预制桩吊运时单吊点和双吊点的设置,应按吊点(或支点)跨间正弯矩与吊点处的负弯矩相等的原则进行布置。考虑预制桩吊运时可能受到冲击和振动的影响,计算吊运弯矩和吊运拉力时,可将桩身重力乘以1.5的动力系数。

5.8.12 对于裂缝控制等级为一级、二级的混凝土预制桩、预应力混凝土管桩,可按下列规定验算桩身的锤击压应力和锤击拉应力:

 

亚博体育彩票    3 ZUIDACHUIJIYAYINGLIHEZUIDACHUIJILAYINGLIFENBIEBUYINGCHAOGUOHUNNINGTUDEZHOUXINKANGYAQIANGDUSHEJIZHIHEZHOUXINKANGLAQIANGDUSHEJIZHI。


5.9 承台计算


Ⅰ受弯计算

5.9.1 桩基承台应进行正截面受弯承载力计算。承台弯距可按本规范第5.9.2~5.9.5条的规定计算,受弯承载力和配筋可按现行国家标准《混凝土结构设计规范》GB 50010的规定进行。
▼ 展开条文说明

5.9.2 柱下独立桩基承台的正截面弯矩设计值可按下列规定计算:

    1 LIANGZHUANGTIAOXINGCHENGTAIHEDUOZHUANGJUXINGCHENGTAIWANJUJISUANJIEMIANQUZAIZHUBIANHECHENGTAIBIANJIECHU[JIANTU5.9.2(a)],KEANXIALIEGONGSHIJISUAN:

 


▼ 展开条文说明

5.9.3 箱形承台和筏形承台的弯距可按下列规定计算:

    1 XIANGXINGCHENGTAIHEFAXINGCHENGTAIDEWANJUYIKAOLVDIJITUCENGXINGZHI、JIZHUANGFENBU、CHENGTAIHESHANGBUJIEGOULEIXINGHEGANGDU,ANDIJI—ZHUANG—CHENGTAI—SHANGBUJIEGOUGONGTONGZUOYONGYUANLIFENXIJISUAN;

亚博体育彩票    2 DUIYUXIANGXINGCHENGTAI,DANGZHUANGDUANCHILICENGWEIJIYAN、MISHIDESUISHILEITU、SHATUQIESHENHOUJUNYUNSHI;HUODANGSHANGBUJIEGOUWEIJIANLIQIANG;HUODANGSHANGBUJIEGOUWEIKUANGJIA-HEXINTONGJIEGOUQIEANBIANGANGDUDIAOPINGYUANZEBUZHUANGSHI,XIANGXINGCHENGTAIDIBANKEJINANJUBUWANJUZUOYONGJINXINGJISUAN;

    3 对于筏形承台,当桩端持力层深厚坚硬、上部结构刚度较好,且柱荷载及柱间距的变化不超过20%时;或当上部结构为框架-核心筒结构且按变刚度调平原则布桩时,可仅按局部弯矩作用进行计算。
▼ 展开条文说明

5.9.4 柱下条形承台梁的弯矩可按下列规定计算:

    1 KEANDANXINGDIJILIANG(DIJIJISUANMOXINGYINGGENJUDIJITUCENGTEXINGXUANQU)JINXINGFENXIJISUAN;

    2 当桩端持力层深厚坚硬且桩柱轴线不重合时,可视桩为不动铰支座,按连续梁计算。
▼ 展开条文说明

5.9.5 砌体墙下条形承台梁,可按倒置弹性地基梁计算弯矩和剪力,并应符合本规范附录G的要求。对于承台上的砌体墙,尚应验算桩顶部位砌体的局部承压强度。
▼ 展开条文说明

Ⅱ受冲切计算

5.9.6 桩基承台厚度应满足柱(墙)对承台的冲切和基桩对承台的冲切承载力要求。

5.9.7 轴心竖向力作用下桩基承台受柱(墙)的冲切,可按下列规定计算:

亚博体育彩票    1 CHONGQIEPOHUAIZHUITIYINGCAIYONGZIZHU(QIANG)BIANHUOCHENGTAIBIANJIECHUZHIXIANGYINGZHUANGDINGBIANYUANLIANXIANSUOGOUCHENGDEZHUITI,ZHUITIXIEMIANYUCHENGTAIDIMIANZHIJIAJIAOBUYINGXIAOYU45°(JIANTU5.9.7)。

亚博体育彩票    2 SHOUZHU(QIANG)CHONGQIECHENGZAILIKEANXIALIEGONGSHIJISUAN:

 

 


▼ 展开条文说明

Ⅲ受剪计算

5.9.9 柱(墙)下桩基承台,应分别对柱(墙)边、变阶处和桩边联线形成的贯通承台的斜截面的受剪承载力进行验算。当承台悬挑边有多排基桩形成多个斜截面时,应对每个斜截面的受剪承载力进行验算。
▼ 展开条文说明

5.9.10 柱下独立桩基承台斜截面受剪承载力应按下列规定计算:

亚博体育彩票    1 CHENGTAIXIEJIEMIANSHOUJIANCHENGZAILIKEANXIALIEGONGSHIJISUAN(JIANTU5.9.10-1):

             
▼ 展开条文说明

Ⅳ局部受压计算

5.9.15 对于柱下桩基,当承台混凝土强度等级低于柱或桩的混凝土强度等级时,应验算柱下或桩上承台的局部受压承载力。
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Ⅴ抗震验算

5.9.16 当进行承台的抗震验算时,应根据现行国家标准《建筑抗震设计规范》GB 50011的规定对承台顶面的地震作用效应和承台的受弯、受冲切、受剪承载力进行抗震调整。
▼ 展开条文说明


6灌注桩施工

6.1 施工准备

6.1.1 GUANZHUZHUANGSHIGONGYINGJUBEIXIALIEZILIAO:

    1 JIANZHUCHANGDIYANTUGONGCHENGKANCHABAOGAO;

    2 ZHUANGJIGONGCHENGSHIGONGTUJITUZHIHUISHENJIYAO;

    3 JIANZHUCHANGDIHELINJINQUYUNEIDEDIXIAGUANXIAN、DIXIAGOUZHUWU、WEIFANG、JINGMIYIQICHEJIANDENGDEDIAOCHAZILIAO;

亚博体育彩票    4 ZHUYAOSHIGONGJIXIEJIQIPEITAOSHEBEIDEJISHUXINGNENGZILIAO;

亚博体育彩票    5 ZHUANGJIGONGCHENGDESHIGONGZUZHISHEJI;

亚博体育彩票    6 SHUINI、SHA、SHI、GANGJINDENGYUANCAILIAOJIQIZHIPINDEZHIJIANBAOGAO;

    7 有关荷载、施工工艺的试验参考资料。

6.1.2 钻孔机具及工艺的选择,应根据桩型、钻孔深度、土层情况、泥浆排放及处理条件综合确定。

6.1.3 施工组织设计应结合工程特点,有针对性地制定相应质量管理措施,主要应包括下列内容:

    1 SHIGONGPINGMIANTU:BIAOMINGZHUANGWEI、BIANHAO、SHIGONGSHUNXU、SHUIDIANXIANLUHELINSHISHESHIDEWEIZHI;CAIYONGNIJIANGHUBICHENGKONGSHI,YINGBIAOMINGNIJIANGZHIBEISHESHIJIQIXUNHUANXITONG;

亚博体育彩票    2 QUEDINGCHENGKONGJIXIE、PEITAOSHEBEIYIJIHELISHIGONGGONGYIDEYOUGUANZILIAO,NIJIANGHUBIGUANZHUZHUANGBIXUYOUNIJIANGCHULICUOSHI;

    3 SHIGONGZUOYEJIHUAHELAODONGLIZUZHIJIHUA;

    4 JIXIESHEBEI、BEIJIAN、GONGJU、CAILIAOGONGYINGJIHUA;

亚博体育彩票    5 ZHUANGJISHIGONGSHI,DUIANQUAN,LAODONGBAOHU、FANGHUO、FANGYU、FANGTAIFENG、BAOPOZUOYE、WENWUHEHUANJINGBAOHUDENGFANGMIANYINGANYOUGUANGUIDINGZHIXING;

    6 保证工程质量、安全生产和季节性施工的技术措施。

6.1.4 成桩机械必须经鉴定合格,不得使用不合格机械。

6.1.5 施工前应组织图纸会审,会审纪要连同施工图等应作为施工依据,并应列入工程档案。

6.1.6 桩基施工用的供水、供电、道路、排水、临时房屋等临时设施,必须在开工前准备就绪,施工场地应进行平整处理,保证施工机械正常作业。

6.1.7 基桩轴线的控制点和水准点应设在不受施工影响的地方。开工前,经复核后应妥善保护,施工中应经常复测。

6.1.8 用于施工质量检验的仪表、器具的性能指标,应符合现行国家相关标准的规定。


6.2 一般规定

亚博体育彩票6.2.1 BUTONGZHUANGXINGDESHIYONGTIAOJIANYINGFUHEXIALIEGUIDING:

    1 NIJIANGHUBIZUANKONGGUANZHUZHUANGYIYONGYUDIXIASHUIWEIYIXIADENIANXINGTU、FENTU、SHATU、TIANTU、SUISHITUJIFENGHUAYANCENG;

亚博体育彩票    2 XUANWACHENGKONGGUANZHUZHUANGYIYONGYUNIANXINGTU、FENTU、SHATU、TIANTU、SUISHITUJIFENGHUAYANCENG;

    3 CHONGKONGGUANZHUZHUANGCHUYIYONGYUSHANGSHUDIZHIQINGKUANGWAI,HAINENGCHUANTOUJIUJICHU、JIANZHULAJITIANTUHUODAGUSHIDENGZHANGAIWU。ZAIYANRONGFAYUDIQUYINGSHENZHONGSHIYONG,CAIYONGSHI,YINGSHIDANGJIAMIKANCHAZUANKONG;

    4 ZHANGLUOXUANZUANKONGYAGUANZHUANGHOUCHAGANGJINLONGYIYONGYUNIANXINGTU、FENTU、SHATU、TIANTU、FEIMISHIDESUISHILEITU、QIANGFENGHUAYAN;

    5 GANZUOYEZUAN、WAKONGGUANZHUZHUANGYIYONGYUDIXIASHUIWEIYISHANGDENIANXINGTU、FENTU、TIANTU、ZHONGDENGMISHIYISHANGDESHATU、FENGHUAYANCENG;

亚博体育彩票    6 ZAIDIXIASHUIWEIJIAOGAO,YOUCHENGYASHUIDESHATUCENG、ZHISHUICENG、HOUDUJIAODADELIUSUZHUANGYUNI、YUNIZHITUCENGZHONGBUDEXUANYONGRENGONGWAKONGGUANZHUZHUANG;

    7 沉管灌注桩宜用于黏性土、粉土和砂土;夯扩桩宜用于桩端持力层为埋深不超过20m的中、低压缩性黏性土、粉土、砂土和碎石类土。
▼ 展开条文说明

6.2.2 成孔设备就位后,必须平整、稳固,确保在成孔过程中不发生倾斜和偏移。应在成孔钻具上设置控制深度的标尺,并应在施工中进行观测记录。

6.2.3 成孔的控制深度应符合下列要求:

    1 MOCAXINGZHUANG:MOCAZHUANGYINGYISHEJIZHUANGZHANGKONGZHICHENGKONGSHENDU;DUANCHENGMOCAZHUANGBIXUBAOZHENGSHEJIZHUANGZHANGJIZHUANGDUANJINRUCHILICENGSHENDU。DANGCAIYONGCHUIJICHENGUANFACHENGKONGSHI,ZHUANGGUANRUTUSHENDUKONGZHIYINGYIBIAOGAOWEIZHU,YIGUANRUDUKONGZHIWEIFU。

    2 端承型桩:当采用钻(冲)、挖掘成孔时,必须保证桩端进入持力层的设计深度;当采用锤击沉管法成孔时,桩管入土深度控制以贯入度为主,以控制标高为辅。
▼ 展开条文说明

6.2.4 灌注桩成孔施工的允许偏差应满足表6.2.4的要求。

6.2.5 钢筋笼制作、安装的质量应符合下列要求:

    1 钢筋笼的材质、尺寸应符合设计要求,制作允许偏差应符合表6.2.5的规定:    
    

    2 FENDUANZHIZUODEGANGJINLONG,QIJIETOUYICAIYONGHANJIEHUOJIXIESHIJIETOU(GANGJINZHIJINGDAYU20mm),BINGYINGZUNSHOUGUOJIAXIANXINGBIAOZHUN《GANGJINJIXIELIANJIETONGYONGJISHUGUICHENG》JGJ 107、《GANGJINHANJIEJIYANSHOUGUICHENG》JGJ 18HE《HUNNINGTUJIEGOUGONGCHENGSHIGONGZHILIANGYANSHOUGUIFAN》GB 50204DEGUIDING;

亚博体育彩票    3 JIAJINGGUYISHEZAIZHUJINWAICE,DANGYINSHIGONGGONGYIYOUTESHUYAOQIUSHIYEKEZHIYUNEICE;

    4 DAOGUANJIETOUCHUWAIJINGYINGBIGANGJINLONGDENEIJINGXIAO100mmYISHANG;

    5 BANYUNHEDIAOZHUANGGANGJINLONGSHI,YINGFANGZHIBIANXING,ANFANGYINGDUIZHUNKONGWEI,BIMIANPENGZHUANGKONGBIHEZIYOULUOXIA,JIUWEIHOUYINGLIJIGUDING。

6.2.6 粗骨料可选用卵石或碎石,其粒径不得大于钢筋间最小净距的1/3。

6.2.7 检查成孔质量合格后应尽快灌注混凝土。直径大于1m或单桩混凝土量超过25m3的桩,每根桩桩身混凝土应留有1组试件;直径不大于1m的桩或单桩混凝土量不超过25m3的桩,每个灌注台班不得少于1组;每组试件应留3件。

6.2.8 在正式施工前,宜进行试成孔。

6.2.9 灌注桩施工现场所有设备、设施、安全装置、工具配件以及个人劳保用品必须经常检查,确保完好和使用安全。


6.3 泥浆护壁成孔灌注桩

ⅠNIJIANGDEZHIBEIHECHULI


   6.3.1 除能自行造浆的黏性土层外,均应制备泥浆。泥浆制备应选用高塑性黏土或膨润土。泥浆应根据施工机械、工艺及穿越土层情况进行配合比设计。

6.3.2 泥浆护壁应符合下列规定:

亚博体育彩票    1 SHIGONGQIJIANHUTONGNEIDENIJIANGMIANYINGGAOCHUDIXIASHUIWEI1.0mYISHANG,ZAISHOUSHUIWEIZHANGLUOYINGXIANGSHI,NIJIANGMIANYINGGAOCHUZUIGAOSHUIWEI1.5mYISHANG;

    2 ZAIQINGKONGGUOCHENGZHONG,YINGBUDUANZHIHUANNIJIANG,ZHIZHIGUANZHUSHUIXIAHUNNINGTU;

亚博体育彩票    3 GUANZHUHUNNINGTUQIAN,KONGDI500mmYINEIDENIJIANGXIANGDUIMIDUYINGXIAOYU1.25;HANSHALVBUDEDAYU8%;NIANDUBUDEDAYU28s;

    4 在容易产生泥浆渗漏的土层中应采取维持孔壁稳定的措施。
▼ 展开条文说明

6.3.3 废弃的浆、渣应进行处理,不得污染环境。


   Ⅱ正、反循环钻孔灌注桩的施工


   6.3.4 对孔深较大的端承型桩和粗粒土层中的摩擦型桩,宜采用反循环工艺成孔或清孔,也可根据土层情况采用正循环钻进,反循环清孔。

6.3.5 泥浆护壁成孔时,宜采用孔口护筒,护筒设置应符合下列规定:

    1 HUTONGMAISHEYINGZHUNQUE、WENDING,HUTONGZHONGXINYUZHUANGWEIZHONGXINDEPIANCHABUDEDAYU50mm;

亚博体育彩票    2 HUTONGKEYONG4~8mmHOUGANGBANZHIZUO,QINEIJINGYINGDAYUZUANTOUZHIJING100mm,SHANGBUYIKAISHE1~2GEYIJIANGKONG;

亚博体育彩票    3 HUTONGDEMAISHESHENDU:ZAINIANXINGTUZHONGBUYIXIAOYU1.0m;SHATUZHONGBUYIXIAOYU1.5m。HUTONGXIADUANWAICEYINGCAIYONGNIANTUTIANSHI;QIGAODUSHANGYINGMANZUKONGNEINIJIANGMIANGAODUDEYAOQIU;

亚博体育彩票    4 SHOUSHUIWEIZHANGLUOYINGXIANGHUOSHUIXIASHIGONGDEZUANKONGGUANZHUZHUANG,HUTONGYINGJIAGAOJIASHEN,BIYAOSHIYINGDARUBUTOUSHUICENG。

6.3.6 当在软土层中钻进时,应根据泥浆补给情况控制钻进速度;在硬层或岩层中的钻进速度应以钻机不发生跳动为准。

6.3.7 钻机设置的导向装置应符合下列规定:

亚博体育彩票    1 QIANSHUIZUANDEZUANTOUSHANGYINGYOUBUXIAOYU3dZHANGDUDEDAOXIANGZHUANGZHI;

亚博体育彩票    2 LIYONGZUANGANJIAYADEZHENGXUNHUANHUIZHUANZUANJI,ZAIZUANJUZHONGYINGJIASHEFUZHENGQI。

6.3.8 如在钻进过程中发生斜孔、塌孔和护筒周围冒浆、失稳等现象时,应停钻,待采取相应措施后再进行钻进。

6.3.9 钻孔达到设计深度,灌注混凝土之前,孔底沉渣厚度指标应符合下列规定:

亚博体育彩票    1 DUIDUANCHENGXINGZHUANG,BUYINGDAYU50mm;

    2 DUIMOCAXINGZHUANG,BUYINGDAYU100mm;

    3 对抗拔、抗水平力桩,不应大于200mm。
▼ 展开条文说明

ⅢCHONGJICHENGKONGGUANZHUZHUANGDESHIGONG


6.3.10 在钻头锥顶和提升钢丝绳之间应设置保证钻头自动转向的装置。

6.3.11 冲孔桩孔口护筒,其内径应大于钻头直径200mm,护筒应按本规范第6.3.5条设置。

6.3.12 泥浆的制备、使用和处理应符合本规范第6.3.1~6.3.3条的规定。

6.3.13 冲击成孔质量控制应符合下列规定:

    1 KAIKONGSHI,YINGDICHUIMIJI,DANGBIAOTUWEIYUNI、XISHADENGRUANRUOTUCENGSHI,KEJIANIANTUKUAIJIAXIAOPIANSHIFANFUCHONGJIZAOBI,KONGNEINIJIANGMIANYINGBAOCHIWENDING;

亚博体育彩票    2 ZAIGEZHONGBUTONGDETUCENG、YANCENGZHONGCHENGKONGSHI,KEANZHAOBIAO6.3.13DECAOZUOYAODIANJINXING;

    3 JINRUJIYANHOU,YINGCAIYONGDACHONGCHENG、DIPINLVCHONGJI,DANGFAXIANCHENGKONGPIANYISHI,YINGHUITIANPIANSHIZHIPIANKONGSHANGFANG300~500mmCHU,RANHOUZHONGXINCHONGKONG;

    4 DANGYUDAOGUSHISHI,KEYUBAOHUOCAIYONGGAODICHONGCHENGJIAOTICHONGJI,JIANGDAGUSHIJISUIHUOJIRUKONGBI;

亚博体育彩票    5 YINGCAIQUYOUXIAODEJISHUCUOSHIFANGZHIRAODONGKONGBI、TAKONG、KUOKONG、KAZUANHEDIAOZUANJINIJIANGLIUSHIDENGSHIGU;

亚博体育彩票    6 MEIZUANJIN4~5mYINGYANKONGYICI,ZAIGENGHUANZUANTOUQIANHUORONGYISUOKONGCHU,JUNYINGYANKONG;

亚博体育彩票    7 JINRUJIYANHOU,FEIZHUANGDUANCHILICENGMEIZUANJIN300~500mmHEZHUANGDUANCHILICENGMEIZUANJIN100~300mSHI,YINGQINGKONGQUYANGYICI,BINGYINGZUOJILU。

6.3.14 排渣可采用泥浆循环或抽渣筒等方法,当采用抽渣筒排渣时,应及时补给泥浆。

6.3.15 冲孔中遇到斜孔、弯孔、梅花孔、塌孔及护筒周围冒浆、失稳等情况时,应停止施工,采取措施后方可继续施工。

6.3.16 大直径桩孔可分级成孔,第一级成孔直径应为设计桩径的0.6~0.8倍。

6.3.17 清孔宜按下列规定进行:

    1 BUYITAKONGDEZHUANGKONG,KECAIYONGKONGQIXINIQINGKONG;

    2 WENDINGXINGCHADEKONGBIYINGCAIYONGNIJIANGXUNHUANHUOCHOUZHATONGPAIZHA,QINGKONGHOUGUANZHUHUNNINGTUZHIQIANDENIJIANGZHIBIAOYINGANBENGUIFANDI6.3.1TIAOZHIXING;

亚博体育彩票    3 QINGKONGSHI,KONGNEINIJIANGMIANYINGFUHEBENGUIFANDI6.3.2TIAODEGUIDING;

    4 GUANZHUHUNNINGTUQIAN,KONGDICHENZHAYUNXUHOUDUYINGFUHEBENGUIFANDI6.3.9TIAODEGUIDING。


   Ⅳ旋挖成孔灌注桩的施工


   6.3.18 旋挖钻成孔灌注桩应根据不同的地层情况及地下水位埋深,采用干作业成孔和泥浆护壁成孔工艺,干作业成孔工艺可按本规范第6.6节执行。

6.3.19 泥浆护壁旋挖钻机成孔应配备成孔和清孔用泥浆及泥浆池(箱),在容易产生泥浆渗漏的土层中可采取提高泥浆相对密度,掺入锯末、增黏剂提高泥浆黏度等维持孔壁稳定的措施。

6.3.20 泥浆制备的能力应大于钻孔时的泥浆需求量,每台套钻机的泥浆储备量不应少于单桩体积。

6.3.21 旋挖钻机施工时,应保证机械稳定、安全作业,必要时可在场地辅设能保证其安全行走和操作的钢板或垫层(路基板)。

6.3.22 每根桩均应安设钢护筒,护筒应满足本规范第6.3.5条的规定。

6.3.23 成孔前和每次提出钻斗时,应检查钻斗和钻杆连接销子、钻斗门连接销子以及钢丝绳的状况,并应清除钻斗上的渣土。 

6.3.24 旋挖钻机成孔应采用跳挖方式,钻斗倒出的土距桩孔口的最小距离应大于6m,并应及时清除。应根据钻进速度同步补充泥浆,保持所需的泥浆面高度不变。
▼ 展开条文说明

6.3.25 钻孔达到设计深度时,应采用清孔钻头进行清孔,并应满足本规范第6.3.2条和第6.3.3条要求。孔底沉渣厚度控制指标应符合本规范第6.3.9条规定。
▼ 展开条文说明

ⅤSHUIXIAHUNNINGTUDEGUANZHU


   6.3.26 钢筋笼吊装完毕后,应安置导管或气泵管二次清孔,并应进行孔位、孔径、垂直度、孔深,沉渣厚度等检验,合格后应立即灌注混凝土。

6.3.27 水下灌注的混凝土应符合下列规定:

亚博体育彩票    1 SHUIXIAGUANZHUHUNNINGTUBIXUJUBEILIANGHAODEHEYIXING,PEIHEBIYINGTONGGUOSHIYANQUEDING;TANLUODUYIWEI180~220mm;SHUINIYONGLIANGBUYINGSHAOYU360kg/m3(DANGCHANRUFENMEIHUISHISHUINIYONGLIANGKEBUSHOUCIXIAN);

    2 SHUIXIAGUANZHUHUNNINGTUDEHANSHALVYIWEI40%~50%,BINGYIXUANYONGZHONGCUSHA;CUGULIAODEZUIDALIJINGYINGXIAOYU40mm;BINGYINGMANZUBENGUIFANDI6.2.6TIAODEYAOQIU;

    3 水下灌注混凝土宜掺外加剂。
▼ 展开条文说明

6.3.28 导管的构造和使用应符合下列规定:

    1 DAOGUANBIHOUBUYIXIAOYU3mm,ZHIJINGYIWEI200~250mm,ZHIJINGZHIZUOPIANCHABUYINGCHAOGUO2mm,DAOGUANDEFENJIEZHANGDUKESHIGONGYIYAOQIUQUEDING,DIGUANZHANGDUBUYIXIAOYU4m,JIETOUYICAIYONGSHUANGLUOWENFANGKOUKUAISUJIETOU;

    2 DAOGUANSHIYONGQIANYINGSHIPINZHUANG、SHIYA,SHISHUIYALIKEQUWEI0.6~1.0MPa;

亚博体育彩票    3 MEICIGUANZHUHOUYINGDUIDAOGUANNEIWAIJINXINGQINGXI。

6.3.29 使用的隔水栓应有良好的隔水性能,并应保证顺利排出;隔水栓宜采用球胆或与桩身混凝土强度等级相同的细石混凝土制作。

6.3.30 灌注水下混凝土的质量控制应满足下列要求:

    1 KAISHIGUANZHUHUNNINGTUSHI,DAOGUANDIBUZHIKONGDIDEJULIYIWEI300~500mm;

    2 YINGYOUZUGOUDEHUNNINGTUCHUBEILIANG,DAOGUANYICIMAIRUHUNNINGTUGUANZHUMIANYIXIABUYINGSHAOYU0.8m;

亚博体育彩票    3 DAOGUANMAIRUHUNNINGTUSHENDUYIWEI2~6m。YANJINJIANGDAOGUANTICHUHUNNINGTUGUANZHUMIAN,BINGYINGKONGZHITIBADAOGUANSUDU,YINGYOUZHUANRENCELIANGDAOGUANMAISHENJIGUANNEIWAIHUNNINGTUGUANZHUMIANDEGAOCHA,TIANXIESHUIXIAHUNNINGTUGUANZHUJILU;

    4 GUANZHUSHUIXIAHUNNINGTUBIXULIANXUSHIGONG,MEIGENZHUANGDEGUANZHUSHIJIANYINGANCHUPANHUNNINGTUDECHUNINGSHIJIANKONGZHI,DUIGUANZHUGUOCHENGZHONGDEGUZHANGYINGJILUBEIAN;

    5 应控制最后一次灌注量,超灌高度宜为0.8~1.0m,凿除泛浆后必须保证暴露的桩顶混凝土强度达到设计等级。
▼ 展开条文说明


6.4 长螺旋钻孔压灌桩

亚博体育彩票6.4.1 DANGXUYAOCHUANYUELAONIANTU、HOUCENGSHATU、SUISHITUYIJISUXINGZHISHUDAYU25DENIANTUSHI,YINGJINXINGSHIZUAN。

6.4.2 钻机定位后,应进行复检,钻头与桩位点偏差不得大于20mm,开孔时下钻速度应缓慢;钻进过程中,不宜反转或提升钻杆。

6.4.3 钻进过程中,当遇到卡钻、钻机摇晃、偏斜或发生异常声响时,应立即停钻,查明原因,采取相应措施后方可继续作业。

6.4.4 根据桩身混凝土的设计强度等级,应通过试验确定混凝土配合比;混凝土坍落度宜为180~220mm粗骨料可采用卵石或碎石,最大粒径不宜大于30mm;可掺加粉煤灰或外加剂。

6.4.5 混凝土泵型号应根据桩径选择,混凝土输送泵管布置宜减少弯道,混凝土泵与钻机的距离不宜超过60m。

6.4.6 桩身混凝土的泵送压灌应连续进行,当钻机移位时,混凝土泵料斗内的混凝土应连续搅拌,泵送混凝土时,料斗内混凝土的高度不得低于400mm。

6.4.7 混凝土输送泵管宜保持水平,当长距离泵送时,泵管下面应垫实。

6.4.8 当气温高于30℃时,宜在输送泵管上覆盖隔热材料,每隔一段时间应洒水降温。

6.4.9 钻至设计标高后,应先泵入混凝土并停顿10~20s,再缓慢提升钻杆。提钻速度应根据土层情况确定,且应与混凝土泵送量相匹配,保证管内有一定高度的混凝土。

6.4.10 在地下水位以下的砂土层中钻进时,钻杆底部活门应有防止进水的措施,压灌混凝土应连续进行。

6.4.11 压灌桩的充盈系数宜为1.0~1.2。桩顶混凝土超灌高度不宜小于0.3~0.5m。

6.4.12 成桩后,应及时清除钻杆及泵管内残留混凝土。长时间停置时,应采用清水将钻杆、泵管、混凝土泵清洗干净。

6.4.13 混凝土压灌结束后,应立即将钢筋笼插至设计深度。钢筋笼插设宜采用专用插筋器。
▼ 展开条文说明


6.5 沉管灌注桩和内夯沉管灌注桩


▼ 展开条文说明


   Ⅰ锤击沉管灌注桩施工


亚博体育彩票   6.5.1 锤击沉管灌注桩施工应根据土质情况和荷载要求,分别选用单打法、复打法或反插法。

6.5.2 锤击沉管灌注桩施工应符合下列规定;

    1 QUNZHUANGJICHUDEJIZHUANGSHIGONG,YINGGENJUTUZHI、BUZHUANGQINGKUANG,CAIQUXIAOJIANFUMIANJITUXIAOYINGDEJISHUCUOSHI,QUEBAOCHENGZHUANGZHILIANG;

    2 ZHUANGGUAN、HUNNINGTUYUZHIZHUANGJIANHUOGANGZHUANGJIANDEJIAGONGZHILIANGHEMAISHEWEIZHIYINGYUSHEJIXIANGFU,ZHUANGGUANYUZHUANGJIANDEJIECHUYINGYOULIANGHAODEMIFENGXING。

6.5.3 灌注混凝土和拔管的操作控制应符合下列规定:

    1 CHENGUANZHISHEJIBIAOGAOHOU,YINGLIJIJIANCHAHECHULIZHUANGGUANNEIDEJINNI、JINSHUIHETUNZHUANGJIANDENGQINGKUANG,BINGLIJIGUANZHUHUNNINGTU;

    2 DANGZHUANGSHENPEIZHIJUBUZHANGDUGANGJINLONGSHI,DIYICIGUANZHUHUNNINGTUYINGXIANGUANZHILONGDIBIAOGAO,RANHOUFANGZHIGANGJINLONG,ZAIGUANZHIZHUANGDINGBIAOGAO。DIYICIBAGUANGAODUYINGYINENGRONGNADIERCIGUANRUDEHUNNINGTULIANGWEIXIAN。ZAIBAGUANGUOCHENGZHONGYINGCAIYONGCECHUIHUOFUBIAOJIANCEHUNNINGTUMIANDEXIAJIANGQINGKUANG;

    3 BAGUANSUDUYINGBAOCHIJUNYUN,DUIYIBANTUCENGBAGUANSUDUYIWEI1m/min,ZAIRUANRUOTUCENGHERUANYINGTUCENGJIAOJIECHUBAGUANSUDUYIKONGZHIZAI0.3~0.8m/min;

亚博体育彩票    4 CAIYONGDAODABAGUANDEDAJICISHU,DANDONGQICHUIBUDESHAOYU50CI/min,ZIYOULUOCHUIXIAOLUOJUQINGJIBUDESHAOYU40CI/min;ZAIGUANDIWEIBAZHIZHUANGDINGSHEJIBIAOGAOZHIQIAN,DAODAHEQINGJIBUDEZHONGDUAN。

6.5.4 混凝土的充盈系数不得小于1.0;对于充盈系数小于1.0的桩,应全长复打,对可能断桩和缩颈桩,应进行局部复打。成桩后的桩身混凝土顶面应高于桩顶设计标高500mm以内。全长复打时,桩管入土深度宜接近原桩长,局部复打应超过断桩或缩颈区1m以上。

6.5.5 全长复打桩施工时应符合下列规定:

    1 DIYICIGUANZHUHUNNINGTUYINGDADAOZIRANDIMIAN;

    2 BAGUANGUOCHENGZHONGYINGJISHIQINGCHUZHANZAIGUANBISHANGHESANLUOZAIDIMIANSHANGDEHUNNINGTU;

亚博体育彩票    3 CHUDAYUFUDADEZHUANGZHOUXIANYINGZHONGHE;

    4 FUDASHIGONGBIXUZAIDIYICIGUANZHUDEHUNNINGTUCHUNINGZHIQIANWANCHENG。

6.5.6 混凝土的坍落度宜为80~100mm。


   Ⅱ振动、振动冲击沉管灌注桩施工


   6.5.7 振动、振动冲击沉管灌注桩应根据土质情况和荷载要求,分别选用单打法、复打法、反插法等。单打法可用于含水量较小的土层,且宜采用预制桩尖;反插法及复打法可用于饱和土层。

6.5.8 振动、振动冲击沉管灌注桩单打法施工的质量控制应符合下列规定:

亚博体育彩票    1 BIXUYANGEKONGZHIZUIHOU30sDEDIANLIU、DIANYAZHI,QIZHIANSHEJIYAOQIUHUOGENJUSHIZHUANGHEDANGDIJINGYANQUEDING;

    2 ZHUANGGUANNEIGUANMANHUNNINGTUHOU,YINGXIANZHENDONG5~10s,ZAIKAISHIBAGUAN,YINGBIANZHENBIANBA,HAIBACHU0.5~1.0m,TINGBA,ZHENDONG5~10s;RUCIFANFU,ZHIZHIZHUANGGUANQUANBUBACHU;

    3 ZAIYIBANTUCENGNEI,BAGUANSUDUYIWEI1.2~1.5m/min,YONGHUOBANZHUANGJIANSHIYIMAN,YONGYUZHIZHUANGJIANSHIKESHIDANGJIAKUAI;ZAIRUANRUOTUCENGZHONGYIKONGZHIZAI0.6~0.8m/min。

6.5.9 振动、振动冲击沉管灌注桩反插法施工的质量控制应符合下列规定;

    1 ZHUANGGUANGUANMANHUNNINGTUHOU,XIANZHENDONGZAIBAGUAN,MEICIBAGUANGAODU0.5~1.0m,FANCHASHENDU0.3~0.5m;ZAIBAGUANGUOCHENGZHONG,YINGFENDUANTIANJIAHUNNINGTU,BAOCHIGUANNEIHUNNINGTUMIANSHIZHONGBUDIYUDIBIAOMIANHUOGAOYUDIXIASHUIWEI1.0~1.5mYISHANG,BAGUANSUDUYINGXIAOYU0.5m/min;

    2 ZAIJUZHUANGJIANCHU1.5mFANWEINEI,YIDUOCIFANCHAYIKUODAZHUANGDUANBUDUANMIAN;

亚博体育彩票    3 CHUANGUOYUNIJIACENGSHI,YINGJIANMANBAGUANSUDU,BINGJIANSHAOBAGUANGAODUHEFANCHASHENDU,ZAILIUDONGXINGYUNIZHONGBUYISHIYONGFANCHAFA。

6.5.10 振动、振动冲击沉管灌注桩复打法的施工要求可按本规范第6.5.4条和第6.5.5条执行。 


   Ⅲ内夯沉管灌注桩施工


   6.5.11 当采用外管与内夯管结合锤击沉管进行夯压、扩底、扩径时,内夯管应比外管短100mm,内夯管底端可采用闭口平底或闭口锥底(见图6.5.11)。

 

6.5.14 桩身混凝土宜分段灌注;拔管时内夯管和桩锤应施压于外管中的混凝土顶面,边压边拔。

6.5.15 施工前宜进行试成桩,并应详细记录混凝土的分次灌注量、外管上拔高度、内管夯击次数、双管同步沉入深度,并应检查外管的封底情况,有无进水、涌泥等,经核定后可作为施工控制依据。


6.6 干作业成孔灌注桩


▼ 展开条文说明


Ⅰ钻孔(扩底)灌注桩施工


   6.6.1 钻孔时应符合下列规定:

亚博体育彩票    1 ZUANGANYINGBAOCHICHUIZHIWENGU,WEIZHIZHUNQUE,FANGZHIYINZUANGANHUANGDONGYINQIKUODAKONGJING;

亚博体育彩票    2 ZUANJINSUDUYINGGENJUDIANLIUZHIBIANHUA,JISHIDIAOZHENG;

    3 ZUANJINGUOCHENGZHONG,YINGSUISHIQINGLIKONGKOUJITU,YUDAODIXIASHUI、TAKONG、SUOKONGDENGYICHANGQINGKUANGSHI,YINGJISHICHULI。

6.6.2 ZUANKONGKUODIZHUANGSHIGONG,ZHIKONGBUFENYINGANBENGUIFANDI6.6.1、6.6.3、6.6.4TIAOGUIDINGZHIXING,KUODIBUWEISHANGYINGFUHEXIALIEGUIDING:

亚博体育彩票    1 YINGGENJUDIANLIUZHIHUOYOUYAZHI,DIAOJIEKUOKONGDAOPIANXUETULIANG,FANGZHICHUXIANCHAOFUHEXIANXIANG;

    2 KUODIZHIJINGHEKONGDIDEXUTUHOUDUYINGFUHESHEJIYAOQIU。

亚博体育彩票6.6.3 CHENGKONGDADAOSHEJISHENDUHOU,KONGKOUYINGYUBAOHU,YINGANBENGUIFANDI6.2.4TIAOGUIDINGYANSHOU,BINGYINGZUOHAOJILU。

6.6.4 GUANZHUHUNNINGTUQIAN,YINGZAIKONGKOUANFANGHUKONGLOUDOU,RANHOUFANGZHIGANGJINLONG,BINGYINGZAICICELIANGKONGNEIXUTUHOUDU。KUODIZHUANGGUANZHUHUNNINGTUSHI,DIYICIYINGGUANDAOKUODIBUWEIDEDINGMIAN,SUIJIZHENDAOMISHI;JIAOZHUZHUANGDINGYIXIA5mFANWEINEIHUNNINGTUSHI,YINGSUIJIAOZHUSUIZHENDAO,MEICIJIAOZHUGAODUBUDEDAYU1.5m。


亚博体育彩票   Ⅱ人工挖孔灌注桩施工


   6.6.5 人工挖孔桩的孔径(不含护壁)不得小于0.8m,且不宜大于2.5m;孔深不宜大于30m。当桩净距小于2.5m时,应采用间隔开挖。相邻排桩跳挖的最小施工净距不得小于4.5m。

6.6.6 RENGONGWAKONGZHUANGHUNNINGTUHUBIDEHOUDUBUYINGXIAOYU100mm,HUNNINGTUQIANGDUDENGJIBUYINGDIYUZHUANGSHENHUNNINGTUQIANGDUDENGJI,BINGYINGZHENDAOMISHI;HUBIYINGPEIZHIZHIJINGBUXIAOYU8mmDEGOUZAOGANGJIN,SHUXIANGJINYINGSHANGXIADAJIEHUOLAJIE。

6.6.7 RENGONGWAKONGZHUANGSHIGONGYINGCAIQUXIALIEANQUANCUOSHI:

    1 KONGNEIBIXUSHEZHIYINGJIRUANPATIGONGRENYUANSHANGXIA;SHIYONGDEDIANHULU、DIAOLONGDENGYINGANQUANKEKAO,BINGPEIYOUZIDONGKAJINBAOXIANZHUANGZHI,BUDESHIYONGMASHENGHENILONGSHENGDIAOGUAHUOJIAOTAJINGBITUYUANSHANGXIA;DIANHULUYIYONGANNIUSHIKAIGUAN,SHIYONGQIANBIXUJIANYANQIANQUANQIDIAONENGLI;

    2 MEIRIKAIGONGQIANBIXUJIANCEJINGXIADEYOUDU、YOUHAIQITI,BINGYINGYOUXIANGYINGDEANQUANFANGFANCUOSHI;DANGZHUANGKONGKAIWASHENDUCHAOGUO10mSHI.YINGYOUZHUANMENXIANGBINGXIASONGFENGDESHEBEI,FENGLIANGBUYISHAOYU25L/s;

    3 KONGKOUSIZHOUBIXUSHEZHIHULAN,HULANGAODUYIWEI0.8m;

亚博体育彩票    4 WACHUDETUSHIFANGYINGJISHIYUNLIKONGKOU,BUDEDUIFANGZAIKONGKOUZHOUBIAN1mFANWEINEI,JIDONGCHELIANGDETONGXINGBUDEDUIJINGBIDEANQUANZAOCHENGYINGXIANG;

亚博体育彩票    5 SHIGONGXIANCHANGDEYIQIEDIANYUAN、DIANLUDEANZHUANGHECHAICHUBIXUZUNSHOUXIANXINGXINGYEBIAOZHUN《SHIGONGXIANCHANGLINSHIYONGDIANANQUANJISHUGUIFAN》JGJ 46DEGUIDING。

6.6.8 KAIKONGQIAN,ZHUANGWEIYINGZHUNQUEDINGWEIFANGYANG,ZAIZHUANGWEIWAISHEZHIDINGWEIJIZHUNZHUANG,ANZHUANGHUBIMOBANBIXUYONGZHUANGZHONGXINDIANXIAOZHENGMOBANWEIZHI,BINGYINGYOUZHUANRENFUZE。

亚博体育彩票6.6.9 DIYIJIEJINGQUANHUBIYINGFUHEXIALIEGUIDING:

亚博体育彩票    1 JINGQUANZHONGXINXIANYUSHEJIZHOUXIANDEPIANCHABUDEDAYU20mm;

    2 JINGQUANDINGMIANYINGBICHANGDIGAOCHU100~150mm,BIHOUYINGBIXIAMIANJINGBIHOUDUZENGJIA100~150mm。

6.6.10 XIUZHUJINGQUANHUBIYINGFUHEXIALIEGUIDING:

    1 HUBIDEHOUDU、LAJIEGANGJIN、PEIJIN、HUNNINGTUQIANGDUDENGJIJUNYINGFUHESHEJIYAOQIU;

    2 SHANGXIAJIEHUBIDEDAJIEZHANGDUBUDEXIAOYU50mm;

亚博体育彩票    3 MEIJIEHUBIJUNYINGZAIDANGRILIANXUSHIGONGWANBI;

    4 HUBIHUNNINGTUBIXUBAOZHENGZHENDAOMISHI,YINGGENJUTUCENGSHENSHUIQINGKUANGSHIYONGSUNINGJI;

亚博体育彩票    5 HUBIMOBANDECHAICHUYINGZAIGUANZHUHUNNINGTU24hZHIHOU;

亚博体育彩票    6 FAXIANHUBIYOUFENGWO、LOUSHUIXIANXIANGSHI,YINGJISHIBUQIANG;

亚博体育彩票    7 TONGYISHUIPINGMIANSHANGDEJINGQUANRENYIZHIJINGDEJICHABUDEDAYU50mm。

亚博体育彩票6.6.11 DANGYUYOUJUBUHUOHOUDUBUDAYU1.5mDELIUDONGXINGYUNIHEKENENGCHUXIANYONGTUYONGSHASHI,HUBISHIGONGKEANXIALIEFANGFACHULI:

亚博体育彩票    1 JIANGMEIJIEHUBIDEGAODUJIANXIAODAO300~500mm,BINGSUIWA、SUIYAN、SUIGUANZHUHUNNINGTU;

    2 CAIYONGGANGHUTONGHUOYOUXIAODEJIANGSHUICUOSHI。

6.6.12 WAZHISHEJIBIAOGAOHOU,YINGQINGCHUHUBISHANGDENITUHEKONGDICANZHA、JISHUI,BINGYINGJINXINGYINBIGONGCHENGYANSHOU。YANSHOUHEGEHOU,YINGLIJIFENGDIHEGUANZHUZHUANGSHENHUNNINGTU。

6.6.13 GUANZHUZHUANGSHENHUNNINGTUSHI,HUNNINGTUBIXUTONGGUOLIUCAO;DANGLUOJUCHAOGUO3mSHI,YINGCAIYONGCHUANTONG,CHUANTONGMODUANJUKONGDIGAODUBUYIDAYU2m;YEKECAIYONGDAOGUANBENGSONG;HUNNINGTUYICAIYONGCHARUSHIZHENDAOQIZHENSHI。

亚博体育彩票6.6.14 DANGSHENSHUILIANGGUODASHI,YINGCAIQUCHANGDIJIESHUI、JIANGSHUIHUOSHUIXIAGUANZHUHUNNINGTUDENGYOUXIAOCUOSHI。YANJINZAIZHUANGKONGZHONGBIANCHOUSHUIBIANKAIWA,TONGSHIBUDEGUANZHUXIANGLINZHUANG。


6.7 灌注桩后注浆


▼ 展开条文说明


6.7.1 灌注桩后注浆工法可用于各类钻、挖、冲孔灌注桩及地下连续墙的沉渣(虚土)、泥皮和桩底、桩侧一定范围土体的加固。
▼ 展开条文说明

6.7.2 后注浆装置的设置应符合下列规定:

    1 HOUZHUJIANGDAOGUANYINGCAIYONGGANGGUAN,QIEYINGYUGANGJINLONGJIAJINGJINBANGZHAGUDINGHUOHANJIE;

亚博体育彩票    2 ZHUANGDUANHOUZHUJIANGDAOGUANJIZHUJIANGFASHULIANGYIGENJUZHUANGJINGDAXIAOSHEZHI,DUIYUZHIJINGBUDAYU1200mmDEZHUANG,YIYANGANGJINLONGYUANZHOUDUICHENGSHEZHI2GEN;DUIYUZHIJINGDAYU1200mmERBUDAYU2500mmDEZHUANG,YIDUICHENGSHEZHI3GEN;

    3 DUIYUZHUANGZHANGCHAOGUO15mQIECHENGZAILIZENGFUYAOQIUJIAOGAOZHE,YICAIYONGZHUANGDUANZHUANGCEFUSHIZHUJIANG;ZHUANGCEHOUZHUJIANGGUANFASHEZHISHULIANGYINGZONGHEDICENGQINGKUANG、ZHUANGZHANGHECHENGZAILIZENGFUYAOQIUDENGYINSUQUEDING,KEZAILIZHUANGDI5~15mYISHANG、ZHUANGDING8mYIXIA,MEIGE6~12mSHEZHIYIDAOZHUANGCEZHUJIANGFA,DANGYOUCULITUSHI,YIJIANGZHUJIANGFASHEZHIYUCULITUCENGXIABU,DUIYUGANZUOYECHENGKONGGUANZHUZHUANGYISHEYUCULITUCENGZHONGBU;

亚博体育彩票    4 DUIYUFEITONGZHANGPEIJINZHUANG,XIABUYINGYOUBUSHAOYU2GENYUZHUJIANGGUANDENGZHANGDEZHUJINZUCHENGDEGANGJINLONGTONGDI;

    5 钢筋笼应沉放到底,不得悬吊,下笼受阻时不得撞笼、墩笼、扭笼。
▼ 展开条文说明

6.7.3 后注浆阀应具备下列性能:

亚博体育彩票    1 ZHUJIANGFAYINGNENGCHENGSHOU1MPaYISHANGJINGSHUIYALI;ZHUJIANGFAWAIBUBAOHUCENGYINGNENGDIKANGSHASHIDENGYINGZHIWUDEGUAZHUANGERBUZHISHIZHUJIANGFASHOUSUN;

    2 ZHUJIANGFAYINGJUBEINIZHIGONGNENG。

6.7.4 浆液配比、终止注浆压力、流量、注浆量等参数设计应符合下列规定:

亚博体育彩票    1 JIANGYEDESHUIHUIBIYINGGENJUTUDEBAOHEDU、SHENTOUXINGQUEDING,DUIYUBAOHETU,SHUIHUIBIYIWEI0.45~0.65;DUIYUFEIBAOHETU,SHUIHUIBIYIWEI0.7~0.9(SONGSANSUISHITU、SHALIYIWEI0.5~0.6);DISHUIHUIBIJIANGYEYICHANRUJIANSHUIJI;

亚博体育彩票    2 ZHUANGDUANZHUJIANGZHONGZHIZHUJIANGYALIYINGGENJUTUCENGXINGZHIJIZHUJIANGDIANSHENDUQUEDING,DUIYUFENGHUAYAN、FEIBAOHENIANXINGTUJIFENTU,ZHUJIANGYALIYIWEI3~10MPa;DUIYUBAOHETUCENGZHUJIANGYALIYIWEI1.2~4MPa,RUANTUYIQUDIZHI,MISHINIANXINGTUYIQUGAOZHI;

亚博体育彩票    3 ZHUJIANGLIULIANGBUYICHAOGUO75L/min;

亚博体育彩票    4 DANZHUANGZHUJIANGLIANGDESHEJIYINGGENJUZHUANGJING、ZHUANGZHANG、ZHUANGDUANZHUANGCETUCENGXINGZHI、DANZHUANGCHENGZAILIZENGFUJISHIFOUFUSHIZHUJIANGDENGYINSUQUEDING,KEANXIASHIGUSUAN:



    DUIDULIDANZHUANG、ZHUANGJUDAYU6dDEQUNZHUANGHEQUNZHUANGCHUSHIZHUJIANGDESHUGENJIZHUANGDEZHUJIANGLIANGYINGANSHANGSHUGUSUANZHICHENGYI1.2DEXISHU;

    5 HOUZHUJIANGZUOYEKAISHIQIAN,YIJINXINGZHUJIANGSHIYAN,YOUHUABINGZUIZHONGQUEDINGZHUJIANGCANSHU。

6.7.5 后注浆作业起始时间、顺序和速率应符合下列规定:

亚博体育彩票    1 ZHUJIANGZUOYEYIYUCHENGZHUANG2dHOUKAISHI;BUYICHIYUCHENGZHUANG30dHOU;

    2 ZHUJIANGZUOYEYUCHENGKONGZUOYEDIANDEJULIBUYIXIAOYU8~10m;

    3 DUIYUBAOHETUZHONGDEFUSHIZHUJIANGSHUNXUYIXIANZHUANGCEHOUZHUANGDUAN;DUIYUFEIBAOHETUYIXIANZHUANGDUANHOUZHUANGCE;DUODUANMIANZHUANGCEZHUJIANGYINGXIANSHANGHOUXIA;ZHUANGCEZHUANGDUANZHUJIANGJIANGESHIJIANBUYISHAOYU2h;

    4 ZHUANGQIANGZHUJIANGYINGDUITONGYIGENZHUANGDEGEZHUJIANGDAOGUANYICISHISHIDENGLIANGZHUJIANG;

    5 对于桩群注浆宜先外围、后内部。
▼ 展开条文说明

6.7.6 当满足下列条件之一时可终止注浆:

亚博体育彩票    1 ZHUJIANGZONGLIANGHEZHUJIANGYALIJUNDADAOSHEJIYAOQIU;

    2 ZHUJIANGZONGLIANGYIDADAOSHEJIZHIDE75%,QIEZHUJIANGYALICHAOGUOSHEJIZHI。

6.7.7 当注浆压力长时间低于正常值或地面出现冒浆或周围桩孔串浆,应改为间歇注浆,间歇时间宜为30~60min,或调低浆液水灰比。

6.7.8 后注浆施工过程中,应经常对后注浆的各项工艺参数进行检查。发现异常应采取相应处理措施。当注浆量等主要参数达不到设计值时,应跟据工程具体情况采取相应措施。

6.7.9 后注浆桩基工程质量检查和验收应符合下列要求;

    1 HOUZHUJIANGSHIGONGWANCHENGHOUYINGTIGONGSHUINICAIZHIJIANYANBAOGAO、YALIBIAOJIANDINGZHENGSHU、SHIZHUJIANGJILU、SHEJIGONGYICANSHU、HOUZHUJIANGZUOYEJILU、TESHUQINGKUANGCHULIJILUDENGZILIAO;

    2 在桩身混凝土强度达到设计要求的条件下,承载力检验应在注浆完成20d后进行,浆液中掺入早强剂时可于注浆完成15d后进行。
▼ 展开条文说明


7混凝土预制桩与钢桩施工

7.1 混凝土预制桩的制作

7.1.1 HUNNINGTUYUZHIZHUANGKEZAISHIGONGXIANCHANGYUZHI,YUZHICHANGDIBIXUPINGZHENG、JIANSHI。

7.1.2 制桩模板宜采用钢模板,模板应具有足够刚度,并应平整,尺寸应准确。

7.1.3 钢筋骨架的主筋连接宜采用对焊和电弧焊,当钢筋直径不小于20mm时,宜采用机械接头连接。主筋接头配置在同一截面内的数量,应符合下列规定:

    1 DANGCAIYONGDUIHANHUODIANHUHANSHI,DUIYUSHOULAGANGJIN,BUDECHAOGUO50%;

亚博体育彩票    2 XIANGLINLIANGGENZHUJINJIETOUJIEMIANDEJULIYINGDAYU35dg(dgWEIZHUJINZHIJING),BINGBUYINGXIAOYU500mm;

    3 必须符合现行行业标准《钢筋焊接及验收规程》JGJ 18和《钢筋机械连接通用技术规程》JGJ 107的规定。
▼ 展开条文说明

7.1.4 预制桩钢筋骨架的允许偏差应符合表7.1.4的规定。


▼ 展开条文说明

7.1.5 确定桩的单节长度时应符合下列规定:

    1 MANZUZHUANGJIADEYOUXIAOGAODU、ZHIZUOCHANGDITIAOJIAN、YUNSHUYUZHUANGXIENENGLI,

    2 避免在桩尖接近或处于硬持力层中时接桩。
▼ 展开条文说明

7.1.6 浇注混凝土预制桩时,宜从桩顶开始灌筑,并应防止另一端的砂浆积聚过多。

7.1.7 锤击预制桩的骨料粒径宜为5~40mm。

7.1.8 锤击预制桩,应在强度与龄期均达到要求后,方可锤击。
▼ 展开条文说明

7.1.9 重叠法制作预制桩时,应符合下列规定:

    1 ZHUANGYULINZHUANGJIDIMOZHIJIANDEJIECHUMIANBUDEZHANLIAN;

亚博体育彩票    2 SHANGCENGZHUANGHUOLINZHUANGDEJIAOZHU,BIXUZAIXIACENGZHUANGHUOLINZHUANGDEHUNNINGTUDADAOSHEJIQIANGDUDE30%YISHANGSHI,FANGKEJINXING;

    3 ZHUANGDEZHONGDIECENGSHUBUYINGCHAOGUO4CENG。

7.1.10 混凝土预制桩的表面应平整、密实,制作允许偏差应符合表7.1.10的规定。

7.1.11 本规范未作规定的预应力混凝土桩的其他要求及离心混凝土强度等级评定方法,应符合国家现行标准《先张法预应力混凝土管桩》GB 13476和《预应力混凝土空心方桩》JG 197的规定。


7.2 混凝土预制桩的起吊、运输和堆放

7.2.1 HUNNINGTUSHIXINZHUANGDEDIAOYUNYINGFUHEXIALIEGUIDING;

    1 HUNNINGTUSHEJIQIANGDUDADAO70%JIYISHANGFANGKEQIDIAO,DADAO100%FANGKEYUNSHU;

    2 ZHUANGQIDIAOSHIYINGCAIQUXIANGYINGCUOSHI,BAOZHENGANQUANPINGWEN,BAOHUZHUANGSHENZHILIANG;

亚博体育彩票    3 SHUIPINGYUNSHUSHI,YINGZUODAOZHUANGSHENPINGWENFANGZHI,YANJINZAICHANGDISHANGZHIJIETUOLAZHUANGTI。

7.2.2 预应力混凝土空心桩的吊运应符合下列规定:

亚博体育彩票    1 CHUCHANGQIANYINGZUOCHUCHANGJIANCHA,QIGUIGE、PIHAO、ZHIZUORIQIYINGFUHESUOSHUDEYANSHOUPIHAONEIRONG;

    2 ZAIDIAOYUNGUOCHENGZHONGYINGQINGDIAOQINGFANG,BIMIANJULIEPENGZHUANG;

    3 DANJIEZHUANGKECAIYONGZHUANYONGDIAOGOUGOUZHUZHUANGLIANGDUANNEIBIZHIJIEJINXINGSHUIPINGQIDIAO;

    4 YUNZHISHIGONGXIANCHANGSHIYINGJINXINGJIANCHAYANSHOU,YANJINSHIYONGZHILIANGBUHEGEJIZAIDIAOYUNGUOCHENGZHONGCHANSHENGLIEFENGDEZHUANG。

7.2.3 顼应力混凝土空心桩的堆放应符合下列规定: 

亚博体育彩票    1 DUIFANGCHANGDIYINGPINGZHENGJIANSHI,ZUIXIACENGYUDIMIANJIECHUDEDIANMUYINGYOUZUGOUDEKUANDUHEGAODU。DUIFANGSHIZHUANGYINGWENGU,BUDEGUNDONG;

    2 YINGANBUTONGGUIGE、ZHANGDUJISHIGONGLIUSHUISHUNXUFENBIEDUIFANG;

    3 DANGCHANGDITIAOJIANXUKESHI,YIDANCENGDUIFANG;DANGDIECENGDUIFANGSHI,WAIJINGWEI500~600mmDEZHUANGBUYICHAOGUO4CENG,WAIJINGWEI300~400mmDEZHUANGBUYICHAOGUO5CENG;

亚博体育彩票    4 DIECENGDUIFANGZHUANGSHI,YINGZAICHUIZHIYUZHUANGZHANGDUFANGXIANGDEDIMIANSHANGSHEZHI2DAODIANMU,DIANMUYINGFENBIEWEIYUJUZHUANGDUAN1/5ZHUANGZHANGCHU;DICENGZUIWAIYUANDEZHUANGYINGZAIDIANMUCHUYONGMUXIESAIJIN;

    5 DIANMUYIXUANYONGNAIYADEZHANGMUFANGHUOZHENMU,BUDESHIYONGYOULENGJIAODEJINSHUGOUJIAN。

7.2.4 取桩应符合下列规定:

    1 DANGZHUANGDIECENGDUIFANGCHAOGUO2CENGSHI,YINGCAIYONGDIAOJIQUZHUANG,YANJINTUOLAQUZHUANG;

    2 SANDIANZHICHENGZIXINGSHIDAZHUANGJIBUYINGTUOLAQUZHUANG。 


7.3 混凝土预制桩的接桩


▼ 展开条文说明

7.3.1 ZHUANGDELIANJIEKECAIYONGHANJIE、FALANLIANJIEHUOJIXIEKUAISULIANJIE(LUOWENSHI、NIEHESHI)。

7.3.2 接桩材料应符合下列规定:

    1 HANJIEJIEZHUANG:GANGBANYICAIYONGDITANGANG,HANTIAOYICAIYONGE43;BINGYINGFUHEXIANXINGXINGYEBIAOZHUN《JIANZHUGANGJIEGOUHANJIEJISHUGUICHENG》JGJ 81YAOQIU。

    2 FALANJIEZHUANG:GANGBANHELUOSHUANYICAIYONGDITANGANG。

7.3.3 采用焊接接桩除应符合现行行业标准《建筑钢结构焊接技术规程》JGJ 81的有关规定外,尚应符合下列规定:

亚博体育彩票    1 XIAJIEZHUANGDUANDEZHUANGTOUYIGAOCHUDIMIAN0.5m;  

亚博体育彩票    2 XIAJIEZHUANGDEZHUANGTOUCHUYISHEDAOXIANGGU;JIEZHUANGSHISHANGXIAJIEZHUANGDUANYINGBAOCHISHUNZHI,CUOWEIPIANCHABUYIDAYU2mm;JIEZHUANGJIUWEIJIUPIANSHI,BUDECAIYONGDACHUIHENGXIANGQIAODA;

亚博体育彩票    3 ZHUANGDUIJIEQIAN,SHANGXIADUANBANBIAOMIANYINGCAIYONGTIESHUAZIQINGSHUAGANJING,POKOUCHUYINGSHUAZHILUCHUJINSHUGUANGZE;

    4 HANJIEYIZAIZHUANGSIZHOUDUICHENGDIJINXING,DAISHANGXIAZHUANGJIEGUDINGHOUCHAICHUDAOXIANGGUZAIFENCENGSHIHAN;HANJIECENGSHUBUDESHAOYU2CENG,DIYICENGHANWANHOUBIXUBAHANZHAQINGLIXIAJING,FANGKEJINXINGDIERCENG(DE)SHIHAN,HANFENGYINGLIANXU、BAOMAN;

    5 HANHAOHOUDEZHUANGJIETOUYINGZIRANLENGQUEHOUFANGKEJIXUCHUIJI,ZIRANLENGQUESHIJIANBUYISHAOYU8min;YANJINCAIYONGSHUILENGQUEHUOHANHAOJISHIDA;

    6 YUTIANHANJIESHI,YINGCAIQUKEKAODEFANGYUCUOSHI;

亚博体育彩票    7 HANJIEJIETOUDEZHILIANGJIANCHAYICAIYONGTANSHANGJIANCE,TONGYIGONGCHENGTANSHANGCHOUYANGJIANYANBUDESHAOYU3GEJIETOU。

7.3.4 采用机械快速螺纹接桩的操作与质量应符合下列规定:

亚博体育彩票    1 JIEZHUANGQIANYINGJIANCHAZHUANGLIANGDUANZHIZUODECHICUNPIANCHAJILIANJIEJIAN,WUSHOUSUNHOUFANGKEQIDIAOSHIGONG,QIXIAJIEZHUANGDUANYIGAOCHUDIMIAN0.8m;

亚博体育彩票    2 JIEZHUANGSHI,XIEXIASHANGXIAJIEZHUANGLIANGDUANDEBAOHUZHUANGZHIHOU,YINGQINGLIJIETOUCANWU,TUSHANGRUNHUAZHI;

    3 YINGCAIYONGZHUANYONGJIETOUZHUIDUDUIZHONG,DUIZHUNSHANGXIAJIEZHUANGJINXINGXUANJINLIANJIE;

    4 KECAIYONGZHUANYONGLIANTIAOSHIBANSHOUJINXINGXUANJIN,(BEIZHANG1m,KAJINHOURENGONGXUANJINZAIYONGTIECHUIQIAOJIBANBEI,)SUOJINHOULIANGDUANBANSHANGYINGYOU1~2mmDEJIANXI。

7.3.5 采用机械啮合接头接桩的操作与质量应符合下列规定:

亚博体育彩票    1 JIANGSHANGXIAJIETOUBANQINGLIGANJING,YONGBANSHOUJIANGYITUMOLIQINGTULIAODELIANJIEXIAOZHUGENXUANRUSHANGJIEZHUANGⅠXINGDUANTOUBANDELUOSHUANKONGNEI,BINGYONGGANGMOBANDIAOZHENGHAOLIANJIEXIAODEFANGWEI;

    2 TICHUXIAJIEZHUANGⅡXINGDUANTOUBANLIANJIECAONEIPAOMOSULIAOBAOHUKUAI,ZAILIANJIECAONEIZHURULIQINGTULIAO,BINGZAIDUANTOUBANMIANZHOUBIANMOSHANGKUANDU20mm、HOUDU3mmDELIQINGTULIAO;DANGDIJITU、DIXIASHUIHANZHONGDENGYISHANGFUSHIJIEZHISHI,ZHUANGDUANBANBANMIANYINGMANTULIQINGTULIAO;

    3 JIANGSHANGJIEZHUANGDIAOQI,SHILIANJIEXIAOYUⅡXINGDUANTOUBANSHANGGELIANJIEKOUDUIZHUN,SUIJIJIANGLIANJIEXIAOCHARULIANJIECAONEI;

亚博体育彩票    4 JIAYASHISHANGXIAJIEZHUANGDEZHUANGTOUBANJIECHU,WANCHENGJIEZHUANG。


7.4 锤击沉桩

7.4.1 CHENZHUANGQIANBIXUCHULIKONGZHONGHEDIXIAZHANGAIWU,CHANGDIYINGPINGZHENG,PAISHUIYINGCHANGTONG,BINGYINGMANZUDAZHUANGSUOXUDEDIMIANCHENGZAILI。

7.4.2 桩锤的选用应根据地质条件、桩型、桩的密集程度、单桩竖向承载力及现有施工条件等因素确定,也可按本规范附录H选用。

7.4.3 桩打入时应符合下列规定:

    1 ZHUANGMAOHUOSONGZHUANGMAOYUZHUANGZHOUWEIDEJIANXIYINGWEI5~10mm;

    2 CHUIYUZHUANGMAO、ZHUANGMAOYUZHUANGZHIJIANYINGJIASHEYINGMU、MADAI、CAODIANDENGDANXINGCHENDIAN;

亚博体育彩票    3 ZHUANGCHUI、ZHUANGMAOHUOSONGZHUANGMAOYINGHEZHUANGSHENZAITONGYIZHONGXINXIANSHANG;

    4 桩插入时的垂直度偏差不得超过0.5%。
▼ 展开条文说明

7.4.4 打桩顺序要求应符合下列规定:

亚博体育彩票    1 DUIYUMIJIZHUANGQUN,ZIZHONGJIANXIANGLIANGGEFANGXIANGHUOSIZHOUDUICHENGSHIDA;

亚博体育彩票    2 DANGYICEPILINJIANZHUWUSHI,YOUPILINJIANZHUWUCHUXIANGLINGYIFANGXIANGSHIDA;

    3 GENJUJICHUDESHEJIBIAOGAO,YIXIANSHENHOUQIAN;

    4 根据桩的规格,宜先大后小,先长后短。
▼ 展开条文说明

7.4.5 打入桩(预制混凝土方桩、预应力混凝土空心桩、钢桩)的桩位偏差,应符合表7.4.5的规定。斜桩倾斜度的偏差不得大于倾斜角正切值的15%(倾斜角系桩的纵向中心线与铅垂线间夹角)。

7.4.6 桩终止锤击的控制应符合下列规定:

    1 DANGZHUANGDUANWEIYUYIBANTUCENGSHI,YINGYIKONGZHIZHUANGDUANSHEJIBIAOGAOWEIZHU,GUANRUDUWEIFU;

    2 ZHUANGDUANDADAOJIANYING、YINGSUDENIANXINGTU、ZHONGMIYISHANGFENTU、SHATU、SUISHILEITUJIFENGHUAYANSHI,YINGYIGUANRUDUKONGZHIWEIZHU,ZHUANGDUANBIAOGAOWEIFU;

    3 贯入度已达到设计要求而桩端标高未达到时,应继续锤击3阵,并按每阵10击的贯入度不应大于设计规定的数值确认,必要时,施工控制贯入度应通过试验确定。
▼ 展开条文说明

7.4.7 当遇到贯入度剧变,桩身突然发生倾斜、位移或有严重回弹、桩顶或桩身出现严重裂缝、破碎等情况时,应暂停打桩,并分析原因,采取相应措施。

7.4.8 当采用射水法沉桩时,应符合下列规定:

    1 SHESHUIFACHENZHUANGYIYONGYUSHATUHESUISHITU;

    2 CHENZHUANGZHIZUIHOU1~2mSHI,YINGTINGZHISHESHUI,BINGCAIYONGCHUIJIZHIGUIDINGBIAOGAO,ZHONGCHUIKONGZHIBIAOZHUNKEANBENGUIFANDI7.4.6TIAOYOUGUANGUIDINGZHIXING。

7.4.9 施打大面积密集桩群时,应采取下列辅助措施:

亚博体育彩票    1 DUIYUZUANKONGCHENZHUANG,YUZUANKONGKONGJINGKEBIZHUANGJING(HUOYUNZHUANGDUIJIAOXIAN)XIAO50~100mm,SHENDUKEGENJUZHUANGJUHETUDEMISHIDU、SHENTOUXINGQUEDING,YIWEIZHUANGZHANGDE1/3~1/2;SHIGONGSHIYINGSUIZUANSUIDA;ZHUANGJIAYIJUBEIZUANKONGCHUIJISHUANGZHONGXINGNENG;

    2 DUIBAOHENIANXINGSHANGDIJI,YINGSHEZHIDAIZHUANGSHAJINGHUOSULIAOPAISHUIBAN;DAIZHUANGSHAJINGZHIJINGYIWEI70~80mm,JIANJUYIWEI1.0~1.5m,SHENDUYIWEI10~12m;SULIAOPAISHUIBANDESHENDU、JIANJUYUDAIZHUANGSHAJINGXIANGTONG;

    3 YINGSHEZHIGELIBANZHUANGHUODIXIALIANXUQIANG;

亚博体育彩票    4 KEKAIWADIMIANFANGZHENGOU,BINGKEYUQITACUOSHIJIEHESHIYONG,FANGZHENGOUGOUKUANKEQU0.5~0.8m,SHENDUANTUZHIQINGKUANGJUEDING:

    5 YINGKONGZHIDAZHUANGSULVHERIDAZHUANGLIANG,24XIAOSHINEIXIUZHISHIJIANBUYINGSHAOYU8h; 

    6 CHENZHUANGJIESHUHOU,YIPUBIANSHISHIYICIFUDA;

    7 YINGDUIBUSHAOYUZONGZHUANGSHU10%DEZHUANGDINGSHANGYONGHESHUIPINGWEIYIJINXINGJIANCE;

    8 沉桩过程中应加强邻近建筑物、地下管线等的观测、监护。
▼ 展开条文说明

7.4.10 预应力混凝土管桩的总锤击数及最后1.0m沉桩锤击数应根据桩身强度和当地工程经验确定。

7.4.11 锤击沉桩送桩应符合下列规定:

亚博体育彩票    1 SONGZHUANGSHENDUBUYIDAYU2.0m;

    2 DANGZHUANGDINGDAZHIJIEJINDIMIANXUYAOSONGZHUANGSHI,YINGCECHUZHUANGDECHUIZHIDUBINGJIANCHAZHUANGDINGZHILIANG,HEGEHOUYINGJISHISONGZHUANG;

亚博体育彩票    3 SONGZHUANGDEZUIHOUGUANRUDUYINGCANKAOXIANGTONGTIAOJIANXIABUSONGZHUANGSHIDEYUANHOUGUANRUDUBINGXIUZHENG;

亚博体育彩票    4 SONGZHUANGHOUYILIUDEZHUANGKONGYINGLIJIHUITIANHUOFUGAI;

    5 DANGSONGZHUANGSHENDUCHAOGUO2.0mQIEBUDAYU6.0mSHI,DAZHUANGJIYINGWEISANDIANZHICHENGLVDAIZIXINGSHIHUOBULVSHICHAIYOUDAZHUANGJI;ZHUANGMAOHEZHUANGCHUIZHIJIANYINGYONGSHUWENYINGMUHUOPANSICENGDIEDEGANGSISHENGZUO“CHUIDIAN”,QIHOUDUYIQU150~200mm。

7.4.12 送桩器及衬垫设置应符合下列规定:

    1 SONGZHUANGQIYIZUOCHENGYUANTONGXING,BINGYINGYOUZUGOUDEQIANGDU、GANGDUHENAIDAXING。SONGZHUANGQIZHANGDUYINGMANZUSONGZHUANGSHENDUDEYAOQIU,WANQUDUBUDEDAYU1/1000;

    2 SONGZHUANGQISHANGXIALIANGDUANMIANYINGPINGZHENG,QIEYUSONGZHUANGQIZHONGXINZHOUXIANXIANGCHUIZHI;

亚博体育彩票    3 SONGZHUANGQIXIADUANMIANYINGKAIKONG,SHIKONGXINZHUANGNEIQIANGYUWAIJIELIANTONG;

    4 SONGZHUANGQIYINGYUZHUANGPIPEI;TAOTONGSHISONGZHUANGQIXIADUANDETAOTONGSHENDUYIQU250~350mm,TAOGUANNEIJINGYINGBIZHUANGWAIJINGDA20~30mm;CHAXIAOSHISONGZHUANGQIXIADUANDECHAXIAOZHANGDUYIQU200~300mm,GANXIAOWAIJINGYINGBI(GUAN)ZHUANGNEIJINGXIAO20~30mm,DUIYUQIANGNEICUNYOUYUJIANGDEGUANZHUANG,BUYICAIYONGCHAXIAOSHISONGZHUANGQI;

    5 SONGZHUANGZUOYESHI,SONGZHUANGQIYUZHUANGTOUZHIJIANYINGSHEZHI1~2CENGMADAIHUOYINGZHIBANDENGCHENDIAN。NEITIANDANXINGCHENDIANYASHIHOUDEHOUDUBUYIXIAOYU60mm。

7.4.13 施工现场应配备桩身垂直度观测仪器(长条水准尺或经纬仪)和观测人员,随时量测桩身的垂直度。


7.5 静压沉桩

7.5.1 CAIYONGJINGYACHENZHUANGSHI,CHANGDIDIJICHENGZAILIBUYINGXIAOYUYAZHUANGJIJIEDIYAQIANGDE1.2BEI,QIECHANGDIYINGPINGZHENG。

7.5.2 静力压桩宜选择液压式和绳索式压桩工艺;宜根据单节桩的长度选用便压式液压压桩机和抱压式液压压桩机。

7.5.3 选择压桩机的参数应包括下列内容:

亚博体育彩票    1 YAZHUANGJIXINGHAO、ZHUANGJIZHILIANG(BUHANPEIZHONG)、ZUIDAYAZHUANGLIDENG;

    2 YAZHUANGJIDEWAIXINGCHICUNJITUOYUNCHICUN;

    3 YAZHUANGJIDEZUIXIAOBIANZHUANGJUJIZUIDAYAZHUANGLI;

    4 ZHANG、DUANCHUANXINGLVXUEDEJIEDIYAQIANG;

亚博体育彩票    5 JIACHIJIGOUDEXINGSHI;

    6 YEYAYOUGANGDESHULIANG、ZHIJING,LVDINGHOUDEYALIBIAODUSHUYUYAZHUANGLIDEDUIYINGGUANXI;

    7 DIAOZHUANGJIGOUDEXINGNENGJIDIAOZHUANGNENGLI。

7.5.4 压桩机的每件配重必须用量具核实,并将其质量标记在该件配重的外露表面;液压式压桩机的最大压桩力应取压桩机的机架重量和配重之和乘以0.9。

7.5.5 当边桩空位不能满足中置式压桩机施压条件时,宜利用压边桩机构或选用前置式液压压桩机进行压桩,但此时应估计最大压桩能力减少造成的影响。

7.5.6 当设计要求或施工需要采用引孔法压桩时,应配备螺旋钻孔机,或在压桩机上配备专用的螺旋钻。当桩端需进入较坚硬的岩层时,应配备可入岩的钻孔桩机或冲孔桩机。

7.5.7 最大压桩力不宜小于设计的单桩竖向极限承载力标准值,必要时可由现场试验确定。

7.5.8 静力压桩施工的质量控制应符合下列规定:

    1 DIYIJIEZHUANGXIAYASHICHUIZHIDUPIANCHABUYINGDAYU0.5%;

    2 YIJIANGMEIGENZHUANGYICIXINGLIANXUYADAODI,QIEZUIHOUYIJIEYOUXIAOZHUANGZHANGBUYIXIAOYU5m;

    3 BAOYALIBUYINGDAYUZHUANGSHENYUNXUCEXIANGYALIDE1.1BEI;

    4 DUIYUDAMIANJIZHUANGQUN,YINGKONGZHIRIYAZHUANGLIANG。

7.5.9 终压条件应符合下列规定:

    1 YINGGENJUXIANCHANGSHIYAZHUANGDESHIYANJIEGUOQUEDINGZHONGYABIAOZHUN;

    2 ZHONGYALIANXUFUYACISHUYINGGENJUZHUANGZHANGJIDIZHITIAOJIANDENGYINSUQUEDING。DUIYURUTUSHENDUDAYUHUODENGYU8mDEZHUANG,FUYACISHUKEWEI2~3CI;DUIYURUTUSHENDUXIAOYU8mDEZHUANG,FUYACISHUKEWEI3~5CI;

    3 WENYAYAZHUANGLIBUDEXIAOYUZHONGYALI,WENDINGYAZHUANGDESHIJIANYIWEI5~10s。

7.5.10 压桩顺序宜根据场地工程地质条件确定,并应符合下列规定:

    1 DUIYUCHANGDIDICENGZHONGJUBUHANSHA、SUISHI、LUANSHISHI,YIXIANDUIGAIQUYUJINXINGYAZHUANG;

    2 DANGCHILICENGMAISHENHUOZHUANGDERUTUSHENDUCHABIEJIAODASHI,YIXIANSHIYAZHANGZHUANGHOUSHIYADUANZHUANG。

7.5.11 压桩过程中应测量桩身的垂直度。当桩身垂直度偏差大于1%时,应找出原因并设法纠正;当桩尖进入较硬土层后,严禁用移动机架等方法强行纠偏。

7.5.12 出现下列情况之一时,应暂停压桩作业,并分析原因,采用相应措施:

亚博体育彩票    1 YALIBIAODUSHUXIANSHIQINGKUANGYUKANCHABAOGAOZHONGDETUCENGXINGZHIMINGXIANBUFU;

亚博体育彩票    2 ZHUANGNANYICHUANYUEYINGJIACENG;

亚博体育彩票    3 SHIJIZHUANGZHANGYUSHEJIZHUANGZHANGXIANGCHAJIAODA;

亚博体育彩票    4 CHUXIANYICHANGXIANGSHENG;YAZHUANGJIXIEGONGZUOZHUANGTAICHUXIANYICHANG;

亚博体育彩票    5 ZHUANGSHENCHUXIANZONGXIANGLIEFENGHEZHUANGTOUHUNNINGTUCHUXIANBOLUODENGYICHANGXIANXIANG;

    6 JIACHIJIGOUDAHUA;

亚博体育彩票    7 YAZHUANGJIXIAXIAN。

7.5.13 静压送桩的质量控制应符合下列规定;

    1 XUELIANGZHUANGDECHUIZHIDUBINGJIANCHAZHUANGTOUZHILIANG,HEGEHOUFANGKESONGZHUANG,YAZHUANG、SONGZHUANGZUOYEYINGLIANXUJINXING;

亚博体育彩票    2 SONGZHUANGYINGCAIYONGZHUANZHIGANGZHISONGZHUANGQI,BUDEJIANGGONGCHENGZHUANGYONGZUOSONGZHUANGQI;

    3 DANGCHANGDISHANGDUOSHUZHUANGDEYOUXIAOZHUANGZHANGXIAOYUHUODENGYU15mHUOZHUANGDUANCHILICENGWEIFENGHUARUANZHIYAN,XUYAOFUYASHI,SONGZHUANGSHENDUBUYICHAOGUO1.5m;

    4 CHUMANZUBENTIAOSHANGSHU3KUANGUIDINGWAI,DANGZHUANGDECHUIZHIDUPIANCHAXIAOYU1%,QIEZHUANGDEYOUXIAOZHUANGZHANGDAYU15mSHI,JINGYAZHUANGSONGZHUANGSHENDUBUYICHAOGUO8m;

亚博体育彩票    5 SONGZHUANGDEZUIDAYAZHUANGLIBUYICHAOGUOZHUANGSHENYUNXUBAOYAYAZHUANGLIDE1.1BEI。

7.5.14 引孔压桩法质量控制应符合下列规定:

亚博体育彩票    1 YINKONGYICAIYONGLUOXUANZUANGANZUOYEFA;YINKONGDECHUIZHIDUPIANCHABUYIDAYU0.5%;

    2 YINKONGZUOYEHEYAZHUANGZUOYEYINGLIANXUJINXING,JIANGESHIJIANBUYIDAYU12h;ZAIRUANTUDIJIZHONGBUYIDAYU3h;

    3 YINKONGZHONGYOUJISHUISHI,YICAIYONGKAIKOUXINGZHUANGJIAN。

7.5.15 当桩较密集,或地基为饱和淤泥、淤泥质土及黏性土时,应设置塑料排水板、袋装砂井消减超孔压或采取引孔等措施,并可按本规范第7.4.9条执行。在压桩施工过程中应对总桩数10%的桩设置上涌和水平偏位观测点,定时检测桩的上浮量及桩顶水平偏位值,若上涌和偏位值较大,应采取复压等措施。

7.5.16 对预制混凝土方桩、预应力混凝土空心桩、钢桩等压入桩的桩位偏差,应符合本规范表7.4.5的规定。


7.6 钢桩(钢管桩、H型桩及其他异型钢桩)施工

ⅠGANGZHUANGDEZHIZUO


亚博体育彩票7.6.1 制作钢桩的材料应符合设计要求,并应有出厂合格证和试验报告。

7.6.2 现场制作钢桩应有平整的场地及挡风防雨措施。

7.6.3 钢桩制作的允许偏差应符合表7.6.3的规定,钢桩的分段长度应满足本规范第7.1.5条的规定,且不宜大于15m。


▼ 展开条文说明

7.6.4 用于地下水有侵蚀性的地区或腐蚀性土层的钢桩,应按设计要求作防腐处理。


Ⅱ钢桩的焊接


亚博体育彩票7.6.5 钢桩的焊接应符合下列规定:

    1 BIXUQINGCHUZHUANGDUANBUDEFUXIU、YOUWUDENGZANGWU,BAOCHIGANZAO;XIAJIEZHUANGDINGJINGCHUIJIHOUBIANXINGDEBUFENYINGGECHU;

    2 SHANGXIAJIEZHUANGHANJIESHIYINGXIAOZHENGCHUIZHIDU,DUIKOUDEJIANXIYIWEI2~3mm;

    3 HANSI(ZIDONGHAN)HUOHANTIAOYINGHONGGAN;

    4 HANJIEYINGDUICHENGJINXING;

    5 YINGCAIYONGDUOCENGHAN,GANGGUANZHUANGGECENGHANFENGDEJIETOUYINGCUOKAI,HANZHAYINGQINGCHU;

    6 DANGQIWENDIYU0℃HUOYUXUETIANJIWUKEKAOCUOSHIQUEBAOHANJIEZHILIANGSHI,BUDEHANJIE;

    7 MEIGEJIETOUHANJIEWANBI,YINGLENGQUE1minHOUFANGKECHUIJI;

亚博体育彩票    8 HANJIEZHILIANGYINGFUHEGUOJIAXIANXINGBIAOZHUN《GANGJIEGOUGONGCHENGSHIGONGZHILIANGYANSHOUGUIFAN》GB 50205HE《JIANZHUGANGJIEGOUHANJIEJISHUGUICHENG》JGJ 81DEGUIDING,MEIGEJIETOUCHUYINGANBIAO7.6.5GUIDINGJINXINGWAIGUANJIANCHAWAI,HAIYINGANJIETOUZONGSHUDE5%JINXINGCHAOSHENGHUO2%JINXINGXSHEXIANPAIPIANJIANCHA,DUIYUTONGYIGONGCHENG,TANSHANGCHOUYANGJIANYANBUDESHAOYU3GEJIETOU。


▼ 展开条文说明

7.6.6 H型钢桩或其他异型薄壁钢桩,接头处应加连接板,可按等强度设置。
▼ 展开条文说明

ⅢGANGZHUANGDEYUNSHUHEDUIFANG


7.6.7 钢桩的运输与堆放应符合下列规定:

亚博体育彩票    1 DUIFANGCHANGDIYINGPINGZHENG、JIANSHI、PAISHUITONGCHANG;

    2 ZHUANGDELIANGDUANYINGYOUSHIDANGBAOHUCUOSHI,GANGGUANZHUANGYINGSHEBAOHUQUAN;

    3 BANYUNSHIYINGFANGZHIZHUANGTIZHUANGJIERZAOCHENGZHUANGDUAN、ZHUANGTISUNHUAIHUOWANQU;

    4 钢桩应按规格、材质分别堆放,堆放层数:φ900mm的钢桩,不宜大于3层;φ600mm的钢桩,不宜大于4层;φ400mm的钢桩,不宜大于5层,H型钢桩不宜大于6层。支点设置应合理,钢桩的两侧应采用木楔塞住。
▼ 展开条文说明

   ⅥGANGZHUANGDECHENZHUANG


7.6.8 当钢桩采用锤击沉桩时,可按本规范第7.4节有关条文实施;当采用静压沉桩时,可按本规范第7.5节有关条文实施。

7.6.9 对敞口钢管桩,当锤击沉桩有困难时,可在管内取土助沉。
▼ 展开条文说明

7.6.10 锤击H型钢桩时,锤重不宜大于4.5t级(柴油锤),且在锤击过程中桩架前应有横向约束装置。
▼ 展开条文说明

7.6.11 当持力层较硬时,H型钢桩不宜送桩。
▼ 展开条文说明

7.6.12 当地表层遇有大块石、混凝土块等回填物时,应在插入H型钢桩前进行触探,并应清除桩位上的障碍物。
▼ 展开条文说明


8承台施工

8.1 基坑开挖和回填

8.1.1 桩基承台施工顺序宜先深后浅。

8.1.2 当承台埋置较深时,应对邻近建筑物及市政设施采取必要的保护措施,在施工期间应进行监测。

8.1.3 基坑开挖前应对边坡支护形式、降水措施、挖土方案、运土路线及堆土位置编制施工方案,若桩基施工引起超孔隙水压力,宜待超孔隙水压力大部分消散后开挖。
▼ 展开条文说明

8.1.4 当地下水位较高需降水时,可根据周围环境情况采用内降水或外降水措施。
▼ 展开条文说明

8.1.5 挖土应均衡分层进行,对流塑状软土的基坑开挖,高差不应超过1m。
▼ 展开条文说明

8.1.6 挖出的土方不得堆置在基坑附近。

8.1.7 机械挖土时必须确保基坑内的桩体不受损坏。

8.1.8 基坑开挖结束后,应在基坑底做出排水盲沟及集水井,如有降水设施仍应维持运转。

8.1.9 ZAICHENGTAIHEDIXIASHIWAIQIANGYUJIKENGCEBIJIANXIHUITIANTUQIAN,YINGPAICHUJISHUI,QINGCHUXUTUHEJIANZHULAJI,TIANTUYINGANSHEJIYAOQIUXUANLIAO,FENCENGHANGSHI,DUICHENGJINXING。


8.2 钢筋和混凝土施工

8.2.1 BANGZHAGANGJINQIANYINGJIANGGUANZHUZHUANGZHUANGTOUFUJIANGBUFENHEYUZHIZHUANGZHUANGDINGCHUIJIMIANPOSUIBUFENQUCHU,ZHUANGTIJIQIZHUJINMAIRUCHENGTAIDEZHANGDUYINGFUHESHEJIYAOQIU;GANGGUANZHUANGSHANGYINGJIAHANZHUANGDINGLIANJIEJIAN;BINGYINGANSHEJISHIZUOZHUANGTOUHEDIANCENGFANGSHUI。

8.2.2 承台混凝土应一次浇筑完成,混凝土入槽宜采用平铺法。对大体积混凝上施工,应采取有效措施防止温度应力引起裂缝。
▼ 展开条文说明


9桩基工程质量检查和验收

9.1 一般规定

9.1.1 ZHUANGJIGONGCHENGYINGJINXINGZHUANGWEI、ZHUANGZHANG、ZHUANGJING、ZHUANGSHENZHILIANGHEDANZHUANGCHENGZAILIDEJIANYAN。

9.1.2 桩基工程的检验按时间顺序可分为三个阶段:施工前检验、施工检验和施工后检验。

9.1.3 对砂、石子、水泥、钢材等桩体原材料质量的检验项目和方法应符合国家现行有关标准的规定。
▼ 展开条文说明


9.2 施工前检验

亚博体育彩票9.2.1 SHIGONGQIANYINGYANGEDUIZHUANGWEIJINXINGJIANYAN。

9.2.2 顶制桩(混凝土预制桩、钢桩)施工前应进行下列检验:

    1 CHENGPINZHUANGYINGANXUANDINGDEBIAOZHUNTUHUOSHEJITUZHIZUO,XIANCHANGYINGDUIQIWAIGUANZHILIANGJIZHUANGSHENHUNNINGTUQIANGDUJINXINGJIANYAN;

    2 YINGDUIJIEZHUANGYONGHANTIAO、YAZHUANGYONGYALIBIAODENGCAILIAOHESHEBEIJINXINGJIANYAN。

9.2.3 灌注桩施工的应进行下列检验:

    1 HUNNINGTUBANZHIYINGDUIYUANCAILIAOZHILIANGYUJILIANG、HUNNINGTUPEIHEBI,TANLUODU、HUNNINGTUQIANGDUDENGJIDENGJINXINGJIANCHA;

    2 GANGJINLONGZHIZUOYINGDUIGANGJINGUIGE、HANTIAOGUIGE。PINZHONG、HANKOUGUIGE、HANFENGZHANGDU,HANFENGWAIGUANHEZHILIANG、ZHUJINHEGUJINDEZHIZUOPIANCHADENGJINXINGJIANCHA,GANGJINLONGZHIZUOYUNXUPIANCHAYINGFUHEBENGUIFANBIAO6.2.5DEYAOQIU。


9.3 施工检验

亚博体育彩票9.3.1 DINGZHIZHUANG(HUNNINGTUYUZHIZHUANG、GANGZHUANG)SHIGONGGUOCHENGZHONGYINGJINXINGXIALIEJIANYAN:

    1 DARU(JINGYA)SHENDU、TINGCHUIBIAOZHUN、JINGYAZHONGZHIYALIZHIJIZHUANGSHEN(JIA)CHUIZHIDUJIANCHA;

亚博体育彩票    2 JIEZHUANGZHILIANG、JIEZHUANGJIANXIESHIJIANJIZHUANGDINGWANZHENGZHUANGKUANG;

亚博体育彩票    3 MEIMIJINCHICHUIJISHU、ZUIHOU1.0mJINCHICHUIJISHU、ZONGCHUIJISHU,ZUIHOUSANZHENGUANRUDUJIZHUANGJIANBIAOGAODENG。

9.3.2 灌注桩施工过程中应进行下列检验:

    1 GUANZHUHUNNINGTUQIAN,YINGANZHAOBENGUIFANDI6ZHANGYOUGUANSHIGONGZHILIANGYAOQIU,DUIYICHENGKONGDEZHONGXINWEIZHI、KONGSHEN、KONGJING、CHUIZHIDU,KONGDICHENZHAHOUDUJINXINGJIANYAN;

    2 YINGDUIGANGJINLONGANFANGDESHIJIWEIZHIDENGJINXINGJIANCHA,JINGTIANXIEXIANGYINGZHILIANGJIANCE、JIANCHAJILU;

    3 GANZUOYETIAOJIANXIACHENGKONGHOUYINGDUIDAZHIJINGZHUANGZHUANGDUANCHILICENGJINXINGJIANYAN。

9.3.3 对于沉管灌注桩施工工序的质量检查宜按本规范第9.1.1~9.3.2条有关项目进行。

9.3.4 对于挤土顶制桩和挤土灌注桩,施工过程均应对桩顶和地面土体的竖向和水平位移进行系统观测;若发现异常,应采取复打、复压、引孔、设置排水措施及调整沉桩速率等措施。


9.4 施工后检验

9.4.1 GENJUBUTONGZHUANGXINGYINGANBENGUIFANBIAO6.2.4JIBIAO7.4.5GUIDINGJIANCHACHENGZHUANGZHUANGWEIPIANCHA。

9.4.2 工程桩应进行承载力和桩身质量检验。

9.4.3 有下列情况之一的桩基工程,应采用静荷载试验对工程桩单桩竖向承载力进行检测,检测数量应根据桩基设计等级、施工前取得试验数据的可靠性因素.按现行行业标准《建筑基桩检测技术规范》JGJ 106确定:

亚博体育彩票    1 GONGCHENGSHIGONGQIANYIJINXINGDANZHUANGJINGZAISHIYAN,DANSHIGONGGUOCHENGBIANGENGLEGONGYICANSHUHUOSHIGONGZHILIANGCHUXIANYICHANGSHI;

    2 SHIGONGQIANGONGCHENGWEIANBENGUIFANDI5.3.1TIAOGUIDINGJINXINGDANZHUANGJINGZAISHIYANDEGONGCHENG;

亚博体育彩票    3 DIZHITIAOJIANFUZA、ZHUANGDESHIGONGZHILIANGKEKAOXINGDI;

亚博体育彩票    4 CAIYONGXINZHUANGXINGHUOXINGONGYI。

9.4.4 有下列情况之一的桩基工程,可采用高应变动测法对工程桩单桩竖向承载力进行检测:

亚博体育彩票    1 CHUBENGUIFANDI9.4.3TIAOGUIDINGTIAOJIANWAIDEZHUANGJI;

亚博体育彩票    2 SHEJIDENGJIWEIJIA、YIJIDEJIANZHUZHUANGJIJINGZAISHIYANJIANCEDEFUZHUJIANCE。

9.4.5 桩身质量除对预留混凝土试件进行强度等级检验外,尚应进行现场检测。检测方法可采用可靠的动测法,对于大直径桩还可采取钻芯法、声波透射法;检测数量可根据现行行业标准《建筑基桩检测技术规范》JGJ 106确定。
▼ 展开条文说明

9.4.6 对专用抗拔桩和对水平承载力有特殊要求的桩基工程,应进行单桩抗拔静载试验和水平静载试验检测。


9.5 基桩及承台工程验收资料

9.5.1 DANGZHUANGDINGSHEJIBIAOGAOYUSHIGONGCHANGDIBIAOGAOXIANGJINSHI,JIZHUANGDEYANSHOUYINGDAIJIZHUANGSHIGONGWANBIHOUJINXING;DANGZHUANGDINGSHEJIBIAOGAODIYUSHIGONGCHANGDIBIAOGAOSHI,YINGDAIKAIWADAOSHEJIBIAOGAOHOUJINXINGYANSHOU。

9.5.2 基桩验收应包括下列资料:

    1 YANTUGONGCHENGKANCHABAOGAO、ZHUANGJISHIGONGTU、TUZHIHUISHENJIYAO、SHEJIBIANGENGDANJICAILIAODAIYONGTONGZHIDANDENG;

    2 JINGSHENDINGDESHIGONGZUZHISHEJI、SHIGONGFANGANJIZHIXINGZHONGDEBIANGENGDAN;

    3 ZHUANGWEICELIANGFANGXIANTU,BAOKUOGONGCHENGZHUANGWEIXIANFUHEDAZHENGDAN;

    4 YUANCAILIAODEZHILIANGHEGEHEZHILIANGJIANDINGSHU;

    5 BANCHENGPINRUYUZHIZHUANG、GANGZHUANGDENGCHANPINDEHEGEZHENG;

    6 SHIGONGJILUJIYINBIGONGCHENGYANSHOUWENJIAN;

    7 CHENGZHUANGZHILIANGJIANCHABAOGAO;

    8 DANZHUANGCHENGZAILIJIANCEBAOGAO;

亚博体育彩票    9 JIKENGWAZHISHEJIBIAOGAODEJIZHUANGJUNGONGPINGMIANTUJIZHUANGDINGBIAOGAOTU;

亚博体育彩票    10 QITABIXUTIGONGDEWENJIANHEJILU。

9.5.3 承台工程验收时应包括下列资料:

亚博体育彩票    1 CHENGTAIGANGJIN、HUNNINGTUDESHIGONGYUJIANCHAJILU;

    2 ZHUANGTOUYUCHENGTAIDEMAOJIN、BIANZHUANGLICHENGTAIBIANYUANJULI、CHENGTAIGANGJINBAOHUCENGJILU;

    3 ZHUANGTOUYUCHENGTAIFANGSHUIGOUZAOJISHIGONGZHILIANG;

亚博体育彩票    4 CHENGTAIHOUDU、ZHANGDUHEKUANDUDELIANGCEJILUJIWAIGUANQINGKUANGMIAOSHUDENG。

9.5.4 承台工程验收除符合本节规定外,尚应符合现行国家标准《混凝土结构工程施工质量验收规范》GB 50204的规定。


 附录A 桩型与成桩工艺选择

亚博体育彩票A.0.1 ZHUANGXINGYUCHENGZHUANGGONGYIYINGGENJUJIANZHUJIEGOULEIXING、HEZAIXINGZHI、ZHUANGDESHIYONGGONGNENG、CHUANYUETUCENG、ZHUANGDUANCHILICENG、DIXIASHUIWEI、SHIGONGSHEBEI、SHIGONGHUANJING、SHIGONGJINGYAN、ZHIZHUANGCAILIAOGONGYINGDENGTIAOJIANXUANZE。KEANBIAOA.0.1JINXING。

 

 


 附录B 预应力混凝土空心桩基本参数

亚博体育彩票B.0.1 LIXINCHENGXINGDEXIANZHANGFAYUYINGLIHUNNINGTUGUANZHUANGDEJIBENCANSHUKEANBIAOB.0.1XUANYONG。

 

 

 


 附录C 考虑承台(包括地下墙体)、基桩协同工作和土的弹性抗力作用计算受水平荷载的桩基

C.0.1 JIBENJIADING:

    1 JIANGTUTISHIWEIDANXINGJIEZHI,QISHUIPINGKANGLIXISHUSUISHENDUXIANXINGZENGJIA(mFA),DIMIANCHUWEILING。

亚博体育彩票    DUIYUDICHENGTAIZHUANGJI,ZAIJISUANZHUANGJISHI,JIADINGZHUANGDINGBIAOGAOCHUDESHUIPINGKANGLIXISHUWEILINGBINGSUISHENDUZENGZHANG。

亚博体育彩票    2 ZAISHUIPINGLIHESHUXIANGYALIZUOYONGXIA,JIZHUANG、CHENGTAI、DIXIAQIANGTIBIAOMIANSHANGRENYIDIANDEJIECHUYINGLI(FAXIANGDANXINGKANGLI)YUGAIDIANDEFAXIANGWEIYIδCHENGZHENGBI。

亚博体育彩票    3 HULVEZHUANGSHEN、CHENGTAI、DIXIAQIANGTICEMIANYUTUZHIJIANDENIANZHELIHEMOCALIDUIDIKANGSHUIPINGLIDEZUOYONG。

    4 ANFUHEZHUANGJISHEJISHI,JIFUHEBENGUIFANDI5.2.5TIAOGUIDING,KEKAOLVCHENGTAIDITUDESHUXIANGKANGLIHESHUIPINGMOZULI。

亚博体育彩票    5 ZHUANGDINGYUCHENGTAIGANGXINGLIANJIE(GUJIE),CHENGTAIDEGANGDUSHIWEIWUQIONGDA。YINCI,ZHIYOUDANGCHENGTAIDEGANGDUJIAODAHUOYOUYUSHANGBUJIEGOUYUCHENGTAIDEXIETONGZUOYONGSHICHENGTAIDEGANGDUDEDAOZENGQIANGDEQINGKUANGXIA,CAISHIYUCAIYONGCIZHONGFANGFAJISUAN。

亚博体育彩票    JISUANZHONGKAOLVTUDEDANXINGKANGLISHI,YAOZHUYITUTIDEWENDINGXING。

  C.0.2 基本计算参数;

亚博体育彩票    1 DIJITUSHUIPINGKANGLIXISHUDEBILIXISHUm,QIZHIANBENGUIFANDI5.7.5TIAOGUIDINGCAIYONG。

    DANGJIZHUANGCEMIANWEIJIZHONGTUCENGZUCHENGSHI,YINGQIUDEZHUYAOYINGXIANGSHENDUhm=2(d+1)MIFANWEINEIDEmZHIZUOWEIJISUANZHI(JIANTUC.0.2)。

 

亚博体育彩票    4 YANSHIDIJIDESHUXIANGKANGLIXISHUCR

亚博体育彩票    5 ZHUANGSHENKANGWANGANGDUEI:ANBENGUIFANDI5.7.2TIAODI6KUANDEGUIDINGJISUANQUEDING。

亚博体育彩票    6 ZHUANGSHENZHOUXIANGYALICHUANDIXISHUξN:

ξN=O.5~1.0

亚博体育彩票    MOCAXINGZHUANGQUXIAOZHI,DUANCHENGXINGZHUANGQUDAZHI。

    7 DIJITUYUCHENGTAIDIZHIJIANDEMOCAXISHUμ,ANBENGUIFANBIAO5.7.3—2QUZHI。

   C.0.3 JISUANGONGSHI:

    1 DANZHUANGJICHUHUOCHUIZHIYUWAILIZUOYONGPINGMIANDEDANPAIZHUANGJICHU,JIANBIAOC.0.3-1。

亚博体育彩票    2 WEIYU(HUOPINGXINGYU)WAILIZUOYONGPINGMIANDEDANPAI(HUODUOPAI)ZHUANGDICHENGTAIZHUANGJI,JIANBIAOC.0.3-2。

亚博体育彩票    3 WEIYU(HUOPINGXINGYU)WAILIZUOYONGPINGMIANDEDANPAI(HUODUOPAI)ZHUANGGAOCHENGTAIZHUANGJI,JIANBIAOC.0.3-3。

   C.0.4 QUEDINGDIZHENZUOYONGXIAZHUANGJIJISUANCANSHUHETUSHIDEJIGEWENTI:

亚博体育彩票    1 DANGCHENGTAIDIMIANYISHANGTUCENGWEIYEHUACENGSHI,BUKAOLVCHENGTAICEMIANTUTIDEDANXINGKANGLIHECHENGTAIDITUDESHUXIANGDANXINGKANGLIYUMOZULI,CISHI,LING(Cn=Cb=0,KEANZUOC.0.3-3GAOCHENGTAIGONGSHIJISUAN。

    2 DANGCHENGTAIDIMIANYISHANGWEIFEIYEHUACENG,ERCHENGTAIDIMIANYUCHENGTAIDIMIANXIATUTIKENENGFASHENGTUOLISHI(CHENGTAIDIMIANYIXIAYOUQIANGUJIE、ZIZHONGSHIXIAN,ZHENXIAN、YEHUATUTISHI),BUKAOLVCHENGTAIDIDIJISHANGDESHUXIANGDANXINGKANGLIHEMOZULI,ZHIKAOLVCHENGTAICEMIANTUTIDEDANXINGKANGLI,YIANBIAOC.0.3-3GAOCHENGTAITUSHIJINXINGJISUAN,DANJISUANCHENGTAIDANWEIBIANWEIYINQIDEZHUANGDING、CHENGTAI、DIXIAQIANGTIDEFANLIHESHI,YINGKAOLVCHENGTAIHEDIXIAQIANGTICEMIANTUTIDANXINGKANGLIDEYINGXIANG。KEANBIAOC.0.3-2DEBUZHOU5DEGONGSHIJISUAN(Cb=0)。

    3 DANGZHUANGDINGYIXIA2(d+1)MISHENDUNEIYOUYEHUAJIACENGSHI,QISHUIPINGKANGLIXISHUDEBILIXISHUZONGHEJISUANZHIm,XIJIANGYEHUACENGDEmZHIANBENGUIFANBIAO5.3.12ZHEJIANHOU,DAIRUSHI(C.0.2-1)HUOSHI(C.0.2-2)ZHONGJISUANQUEDING。

 

 

 

 

 

 

 

 

 

 

 

 

 


 附录D Boussinesq(布辛奈斯克)解的附加应力系数 α 、平均附加应力系数α

亚博体育彩票D.0.1 JUXINGMIANJISHANGJUNBUHEZAIZUOYONGXIAJIAODIANDEFUJIAYINGLIXISHUα、PINGJUNFUJIAYINGLIXISHUα YINGANBIAOD.0.1-1、D.0.1-2QUEDING。

 

 

 

 

 

 

 

 

 

D.0.3 圆形面积上均布荷载作用系中点的附加应力系数α、平均附加应力系数 α 应按表D.0.3确定。

D.0.4 圆形面积上三角形分布荷载作用下边点的附加应力系数α、平均附加应力系数 α 应按表D.0.4确定。

 


 附录E 桩基等效沉降系数ψe计算参数

E.0.1 ZHUANGJIDENGXIAOCHENJIANGXISHUYINGANBIAOE.0.1-1~BIAOE.0.1-5ZHONGLIECHUDECANSHU,CAIYONGBENGUIFANSHI(5.5.9-1)HESHI(5.9.9-2)JISUAN。

 

 

 

 

 

 

 


 附录F 考虑柱径影响的Mindlin(明德林)解应力影响系数

亚博体育彩票F.0.1 BENGUIFANDI5.5.14TIAOGUIDINGJIZHUANGYINQIDEFUJIAYINGLIYINGGENJUKAOLVZHUANGJINGYINGXIANGDEMINGDELINJIEANXIALIEGONGSHIJISUAN:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


 附录G 按倒置弹性地基梁计算砌体墙下条形桩基承台梁

亚博体育彩票G.0.1 ANDAOZHIDANXINGDIJILIANGJISUANQITIQIANGXIATIAOXINGZHUANGJILIANXUCHENGTAILIANGSHI,XIANQIUDEZUOYONGYULIANGSHANGDEHEZAI,RANHOUANPUTONGLIANXULIANGJISUANQIWANJUHEJIANLI。WANJUHEJIANLIDEJISUANGONGSHIKEGENJUTUG.0.1SUOSHIJISUANJIANTU,FENBIEANBIAOG.0.1CAIYONG。

 

 

    当门窗口下布有桩,且承台梁顶面至门窗口的砌体高度小于门窗口的净宽时,则应按倒置的简支梁计算该段梁的弯距,即取门窗净宽的1.05倍为计算跨度,取门窗下桩顶荷载为计算集中荷载进行计算。


 附录H 锤击沉桩锤重的选用

亚博体育彩票H.0.1 CHUIJICHENZHUANGDECHUIZHONGKEGENJUBIAOH.0.1XUANYONG。

1

总则

亚博体育彩票1.0.1 WEILEZAIZHUANGJISHEJIYUSHIGONGZHONGGUANCHEZHIXINGGUOJIADEJISHUJINGJIZHENGCE,ZUODAOANQUANSHIYONG、JISHUXIANJIN、JINGJIHELI、QUEBAOZHILIANG,BAOHUHUANJING,ZHIDINGBENGUIFAN。

1.0.2 本规范适用于建筑(包括构筑物)桩基的设计、施工及验收。

1.0.3 桩基的设计与施工,应综合考虑工程地质与水文地质条件、上部结构类型、使用功能、荷载特征、施工技术条件与环境;应重视地方经验,因地制宜,注重概念设计,合理选择桩型、成桩工艺和承台形式,优化布桩,节约资源;应强化施工质量控制与管理。
▼ 展开条文说明

1.0.4 在进行桩基设计、施工及验收时,除应符合本规范外,尚应符合国家现行有关标准、规范的规定。


2术语、符号

2.1 术语


▼ 展开条文说明

2.1.1 ZHUANGJI pile foundation

亚博体育彩票    YOUSHEZHIYUYANTUZHONGDEZHUANGHEYUZHUANGDINGLIANJIEDECHENGTAIGONGTONGZUCHENGDEJICHUHUOYOUZHUYUZHUANGZHIJIELIANJIEDEDANZHUANGJICHU。

2.1.2 复合桩基 composite pile foundation

    YOUJIZHUANGHECHENGTAIXIADIJITUGONGTONGCHENGDANHEZAIDEZHUANGJICHU。

2.1.3 基桩 foundation pile

    ZHUANGJICHUZHONGDEDANZHUANG。

2.1.4 复合基桩 composite foundation pile

亚博体育彩票    DANZHUANGJIQIDUIYINGMIANJIDECHENGTAIXIADIJITUZUCHENGDEFUHECHENGZAIJIZHUANG。

2.1.5 减沉复合疏桩基础 composite foundation with settlement-reducing piles

    RUANTUDIJITIANRANDIJICHENGZAILIJIBENMANZUYAOQIUDEQINGKUANGXIA,WEIJIANXIAOCHENJIANGCAIYONGSHUBUMOCAXINGZHUANGDEFUHEZHUANGJI。

2.1.6 单桩竖向极限承载力 ultimate vertical bearing capacity of a single pile

亚博体育彩票    DANZHUANGZAISHUXIANGHEZAIZUOYONGXIADAODAPOHUAIZHUANGTAIQIANHUOCHUXIANBUSHIYUJIXUCHENGZAIDEBIANXINGSHISUODUIYINGDEZUIDAHEZAI,TAQUJUEYUTUDUIZHUANGDEZHICHENGZULIHEZHUANGSHENCHENGZAILI。

2.1.7 极限侧阻力 ultimate shaft resistance

    XIANGYINGYUZHUANGDINGZUOYONGJIXIANHEZAISHI,ZHUANGSHENCEBIAOMIANSUOFASHENGDEYANTUZULI。

2.1.8 极限端阻力 ultimate tip resistance

    XIANGYINGYUZHUANGDINGZUOYONGJIXIANHEZAISHI,ZHUANGDUANSUOFASHENGDEYANTUZULI。

2.1.9 单桩竖向承载力特征值 characterisitic value of the vertical bearing capacity of a single pile

    DANZHUANGSHUXIANGJIXIANCHENGZAILIBIAOZHUNZHICHUYIANQUANXISHUHOUDECHENGZAILIZHI。

2.1.10 变刚度调平设计 optimized design of pile foundation stiffness to reduce differential settlement

亚博体育彩票    KAOLVSHANGBUJIEGOUXINGSHI、HEZAIHEDICENGFENBUYIJIXIANGHUZUOYONGXIAOYING,TONGGUODIAOZHENGZHUANGJING、ZHUANGZHANG、ZHUANGJUDENGGAIBIANJIZHUANGZHICHENGGANGDUFENBU,YISHIJIANZHUWUCHENJIANGQUYUJUNYUN、CHENGTAINEILIJIANGDIDESHEJIFANGFA。

2.1.11 承台效应系数 pile cap effect coefficient

亚博体育彩票    SHUXIANGHEZAIXIA,CHENGTAIDIDIJITUCHENGZAILIDEFAHUILV。

2.1.12 负摩阻力 negative skin friction,negative shaft resistance

    ZHUANGZHOUTUYOUYUZIZHONGGUJIE、SHIXIAN、DIMIANHEZAIZUOYONGDENGYUANYINERCHANSHENGDAYUJIZHUANGDECHENJIANGSUOYINQIDEDUIZHUANGBIAOMIANDEXIANGXIAMOZULI。

2.1.13 下拉荷载 downdrag

亚博体育彩票    ZUOYONGYUDANZHUANGZHONGXINGDIANYISHANGDEFUMOZULIZHIHE。

2.1.14 土塞效应 plugging effect

    CHANGKOUKONGXINZHUANGCHENZHUANGGUOCHENGZHONGTUTIYONGRUGUANNEIXINGCHENGDETUSAI,DUIZHUANGDUANZULIDEFAHUICHENGDUDEYINGXIANGXIAOYING。

2.1.15 灌注桩后注浆 post grouting for cast-in-situ pile

亚博体育彩票    GUANZHUZHUANGCHENGZHUANGHOUYIDINGSHIJIAN,TONGGUOYUSHEYUZHUANGSHENNEIDEZHUJIANGDAOGUANJIYUZHIXIANGLIANDEZHUANGDUAN、ZHUANGCEZHUJIANGFAZHURUSHUINIJIANG,SHIZHUANGDUAN、ZHUANGCETUTI(BAOKUOCHENZHAHENIPI)DEDAOJIAGU,CONGERTIGAODANZHUANGCHENGZAILI,JIANXIAOCHENJIANG。

2.1.16 桩基等效沉降系数 equivalent settlement coefficient for calculating settlement of pile foundations

亚博体育彩票    DANXINGBANWUXIANTIZHONGQUNZHUANGJICHUANMindlin(MINGDELIN)JIEJISUANCHENJIANGLIANGωM,YUANDENGDAIDUNJIBoussinesq(BUXINNAISIKE)JIEJISUANCHENJIANGLIANGωBZHIBI,YONGYIFANYINGMindlinJIEYINGLIFENBUDUIJISUANCHENJIANGDEYINGXIANG。


2.2 符号


▼ 展开条文说明

2.2.1 ZUOYONGHEZUOYONGXIAOYING

亚博体育彩票Fk——ANHEZAIXIAOYINGBIAOZHUNZUHEJISUANDEZUOYONGYUCHENGTAIDINGMIANDESHUXIANGLI;

Gk——ZHUANGJICHENGTAIHECHENGTAISHANGTUZIZHONGBIAOZHUNZHI;

Hk——ANHEZAIXIAOYINGBIAOZHUNZUHEJISUANDEZUOYONGYUCHENGTAIDIMIANDESHUIPINGLI;

亚博体育彩票Hik——ANHEZAIXIAOYINGBIAOZHUNZUHEJISUANDEZUOYONGYUDI i JIZHUANGHUOFUHEJIZHUANGDESHUIPINGLI;

亚博体育彩票Mxk、Myk——ANHEZAIXIAOYINGBIAOZHUNZUHEJISUANDEZUOYONGYUCHENGTAIDIMIANDEWAILI,RAOTONGGUOZHUANGQUNXINGXINDEx、yZHUZHOUDELIJU;

亚博体育彩票Nik——HEZAIXIAOYINGBIAOZHUNZUHEPIANXINSHUXIANGLIZUOYONGXIADI i JIZHUANGHUOFUHEJIZHUANGDESHUXIANGLI;

亚博体育彩票Qgn——ZUOYONGYUQUNZHUANGZHONGMOUYIJIZHUANGDEXIALAHEZAI;

亚博体育彩票qf——JIZHUANGQIEXIANGDONGZHANGLI。

2.2.2 抗力和材料性能

Es——TUDEYASUOMOLIANG;

亚博体育彩票ft、fc——HUNNINGTUKANGLA、KANGYAQIANGDUSHEJIZHI;

frk——YANSHIBAOHEDANZHOUKANGYAQIANGDUBIAOZHUNZHI;

亚博体育彩票fs、qc——JINGLICHUTANSHUANGQIAOTANTOUPINGJUNCEZULI、PINGJUNDUANZULI;

亚博体育彩票m——ZHUANGCEDIJITUSHUIPINGKANGLIXISHUDEBILIXISHU;

ps——JINGLICHUTANDANQIAOTANTOUBIGUANRUZULI;

亚博体育彩票qsik——DANZHUANGDI i CENGTUDEJIXIANCEZULIBIAOZHUNZHI;

qpk——DANZHUANGJIXIANDUANZULIBIAOZHUNZHI;

Qsk、Qpk——DANZHUANGZONGJIXIANCEZULI、ZONGJIXIANDUANZULIBIAOZHUNZHI;

Quk——DANZHUANGSHUXIANGJIXIANCHENGZAILIBIAOZHUNZHI;

R——JIZHUANGHUOFUHEJIZHUANGSHUXIANGCHENGZAILITEZHENGZHI;

亚博体育彩票Ra——DANZHUANGSHUXIANGCHENGZAILITEZHENGZHI;

Rha——DANZHUANGSHUIPINGCHENGZAILITEZHENGZHI;

亚博体育彩票Rh——JIZHUANGSHUIPINGCHENGZAILITEZHENGZHI;

Tgk——QUNZHUANGCHENGZHENGTIPOHUAISHIJIZHUANGKANGBAJIXIANCHENGZAILIBIAOZHUNZHI;

Tuk——QUNZHUANGCHENGFEIZHENGTIPOHUAISHIJIZHUANGKANGBAJIXIANCHENGZAILIBIAOZHUNZHI;

γ、γe——TUDEZHONGDU、YOUXIAOZHONGDU。

2.2.3 几何参数

Ap——ZHUANGDUANMIANJI;

Aps——ZHUANGSHENJIEMIANMIANJI;

Ac——JISUANJIZHUANGSUODUIYINGDECHENGTAIDIJINGMIANJI;

Bc——CHENGTAIKUANDU;

d——ZHUANGSHENSHEJIZHIJING;

D——ZHUANGDUANKUODISHEJIZHIJING;

l——ZHUANGSHENZHANGDU;

Lc——CHENGTAIZHANGDU;

sa——JIZHUANGZHONGXINJU;

u——ZHUANGSHENZHOUZHANG;

亚博体育彩票zn——ZHUANGJICHENJIANGJISUANSHENDU(CONGZHUANGDUANPINGMIANSUANQI)。

2.2.4 计算系数

αE——GANGJINDANXINGMOLIANGYUHUNNINGTUDANXINGMOLIANGDEBIZHI;

亚博体育彩票ηc——CHENGTAIXIAOYINGXISHU;

ηf——DONGZHANGYINGXIANGXISHU;

ζ——ZHUANGQIANYANDUANCEZUHEDUANZUZONGHEXISHU;

ψsi、ψp——DAZHIJINGZHUANGCEZULI、DUANZULICHICUNXIAOYINGXISHU;

亚博体育彩票λp——ZHUANGDUANTUSAIXIAOYINGXISHU;

λ——JIZHUANGKANGBAXISHU;

ψ——ZHUANGJICHENJIANGJISUANJINGYANXISHU;

ψc——CHENGZHUANGGONGYIXISHU;

亚博体育彩票ψe——ZHUANGJIDENGXIAOCHENJIANGXISHU;

α、α——BoussinesqJIEDEFUJIAYINGLIXISHU、PINGJUNFUJIAYINGLIXISHU。


3基本设计规定

3.1 一般规定

3.1.1 桩基础应按下列两类极限状态设计:

    1 CHENGZAINENGLIJIXIANZHUANGTAI:ZHUANGJIDADAOZUIDACHENGZAINENGLI、ZHENGTISHIWENHUOFASHENGBUSHIYUJIXUCHENGZAIDEBIANXING;

    2 正常使用极限状态:桩基达到建筑物正常使用所规定的变形限值或达到耐久性要求的某项限值。
▼ 展开条文说明

3.1.2 根据建筑规模、功能特征、对差异变形的适应性、场地地基和建筑物体形的复杂性以及由于桩基问题可能造成建筑破坏或影响正常使用的程度,应将桩基设计分为表3.1.2所列的三个设计等级。桩基设计时,应根据表3.1.2确定设计等级。


▼ 展开条文说明

3.1.3 桩基应根据具体条件分别进行下列承载能力计算和稳定性验算:

    1 YINGGENJUZHUANGJIDESHIYONGGONGNENGHESHOULITEZHENGFENBIEJINXINGZHUANGJIDESHUXIANGCHENGZAILIJISUANHESHUIPINGCHENGZAILIJISUAN;

亚博体育彩票    2 YINGDUIZHUANGSHENHECHENGTAIJIEGOUCHENGZAILIJINXINGJISUAN;DUIYUZHUANGCETUBUPAISHUIKANGJIANQIANGDUXIAOYU10kPaQIEZHANGJINGBIDAYU50DEZHUANG,YINGJINXINGZHUANGSHENYAQUYANSUAN;DUIYUHUNNINGTUYUZHIZHUANG,YINGANDIAOZHUANG、YUNSHUHECHUIJIZUOYONGJINXINGZHUANGSHENCHENGZAILIYANSUAN;DUIYUGANGGUANZHUANG,YINGJINXINGJUBUYAQUYANSUAN;

亚博体育彩票    3 DANGZHUANGDUANPINGMIANYIXIACUNZAIRUANRUOXIAWOCENGSHI,YINGJINXINGRUANRUOXIAWOCENGCHENGZAILIYANSUAN;

亚博体育彩票    4 DUIWEIYUPODI、ANBIANDEZHUANGJI,YINGJINXINGZHENGTIWENDINGXINGYANSUAN;

    5 DUIYUKANGFU,KANGBAZHUANGJI,YINGJINXINGJIZHUANGHEQUNZHUANGDEKANGBACHENGZAILIJISUAN;

    6 对于抗震设防区的桩基,应进行抗震承载力验算。
▼ 展开条文说明

3.1.4 下列建筑桩基应进行沉降计算:

    1 SHEJIDENGJIWEIJIAJIDEFEIQIANYANZHUANGHEFEISHENHOUJIANYINGCHILICENGDEJIANZHUZHUANGJI;

    2 SHEJIDENGJIWEIYIJIDETIXINGFUZA、HEZAIFENBUXIANZHUBUJUNYUNHUOZHUANGDUANPINGMIANYIXIACUNZAIRUANRUOTUCENGDEJIANZHUZHUANGJI;

    3 RUANTUDIJIDUOCENGJIANZHUJIANCHENFUHESHUZHUANGJICHU。

3.1.5 对受水平荷载较大,或对水平位移有严格限制的建筑桩基,应计算其水平位移。
▼ 展开条文说明

3.1.6 应根据桩基所处的环境类别和相应的裂缝控制等级,验算桩和承台正截面的抗裂和裂缝宽度。
▼ 展开条文说明

3.1.7 桩基设计时,所采用的作用效应组合与相应的抗力应符合下列规定:

    1 QUEDINGZHUANGSHUHEBUZHUANGSHI,YINGCAIYONGCHUANZHICHENGTAIDIMIANDEHEZAIXIAOYINGBIAOZHUNZUHE;XIANGYINGDEKANGLIYINGCAIYONGJIZHUANGHUOFUHEJIZHUANGCHENGZAILITEZHENGZHI。

    2 JISUANHEZAIZUOYONGXIADEZHUANGJICHENJIANGHESHUIPINGWEIYISHI,YINGCAIYONGHEZAIXIAOYINGZHUNYONGJIUZUHE;JISUANSHUIPINGDIZHENZUOYONG、FENGZAIZUOYONGXIADEZHUANGJISHUIPINGWEIYISHI,YINGCAIYONGSHUIPINGDIZHENZUOYONG、FENGZAIXIAOYINGBIAOZHUNZUHE。

    3 YANSUANPODI、ANBIANJIANZHUZHUANGJIDEZHENGTIWENDINGXINGSHI,YINGCAIYONGHEZAIXIAOYINGBIAOZHUNZUHE;KANGZHENSHEFANGQU,YINGCAIYONGDIZHENZUOYONGXIAOYINGHEHEZAIXIAOYINGDEBIAOZHUNZUHE。

亚博体育彩票    4 ZAIJISUANZHUANGJIJIEGOUCHENGZAILI、QUEDINGCHICUNHEPEIJINSHI,YINGCAIYONGCHUANZHICHENGTAIDINGMIANDEHEZAIXIAOYINGJIBENZUHE。DANGJINXINGCHENGTAIHEZHUANGSHENLIEFENGKONGZHIYANSUANSHI,YINGFENBIECAIYONGHEZAIXIAOYINGBIAOZHUNZUHEHEHEZAIXIAOYINGZHUNYONGJIUZUHE。

    5 ZHUANGJIJIEGOUANQUANDENGJI、JIEGOUSHEJISHIYONGNIANXIANHEJIEGOUZHONGYAOXINGXISHUγ0YINGANXIANXINGYOUGUANJIANZHUJIEGOUGUIFANDEGUIDINGCAIYONG,CHULINSHIXINGJIANZHUWAI,ZHONGYAOXINGXISHUγ0YINGBUXIAOYU1.0。

    6 对桩基结构进行抗震验算时,其承载力调整系数γRE应按现行国家标准《建筑抗震设计规范》GB 50011的规定采用。
▼ 展开条文说明

3.1.8 以减小差异沉降和承台内力为目标的变刚度调平设计,宜结合具体条件按下列规定实施:

亚博体育彩票    1 DUIYUZHUQUNLOULIANTIJIANZHU,DANGGAOCENGZHUTICAIYONGZHUANGJISHI,QUNFANG(HANCHUNDIXIASHI)DEDIJIHUOZHUANGJIGANGDUYIXIANGDUIRUOHUA,KECAIYONGTIANRANDIJI、FUHEDIJI、SHUZHUANGHUODUANZHUANGJICHU。

    2 DUIYUKUANGJIA-HEXINTONGJIEGOUGAOCENGJIANZHUZHUANGJI,YINGQIANGHUAHEXINTONGQUYUZHUANGJIGANGDU(RUSHIDANGZENGJIAZHUANGZHANG、ZHUANGJING、ZHUANGSHU、CAIYONGHOUZHUJIANGDENGCUOSHI),XIANGDUIRUOHUAHEXINTONGWAIWEIZHUANGJIGANGDU(CAIYONGFUHEZHUANGJI,SHIDICENGTIAOJIANJIANXIAOZHUANGZHANG)。

    3 DUIYUKUANGJIA-HEXINTONGJIEGOUGAOCENGJIANZHUTIANRANDIJICHENGZAILIMANZUYAOQIUDEQINGKUANGXIA,YIYUHEXINTONGQUYUJUBUSHEZHIZENGQIANGGANGDU、JIANXIAOCHENJIANGDEMOCAXINGZHUANG。

    4 DUIYUDATILIANGTONGCANG、CHUGUANDEMOCAXINGZHUANGJI,YIANNEIQIANGWAIRUOYUANZEBUZHUANG。

    5 对上述按变刚度调平设计的桩基,宜进行上部结构-承台-桩-土共同工作分析。
▼ 展开条文说明

3.1.9 软土地基上的多层建筑物,当天然地基承载力基本满足要求时,可采用减沉复合疏桩基础。
▼ 展开条文说明

3.1.10 对于本规范第3.1.4条规定应进行沉降计算的建筑桩基,在其施工过程及建成后使用期间,应进行系统的沉降观测直至沉降稳定。
▼ 展开条文说明

3.2 基本资料

亚博体育彩票3.2.1 ZHUANGJISHEJIYINGJUBEIYIXIAZILIAO:

    1 YANTUGONGCHENGKANCHAWENJIAN:

        1) ZHUANGJIANLIANGLEIJIXIANZHUANGTAIJINXINGSHEJISUOXUYONGYANTUWULILIXUECANSHUJIYUANWEICESHICANSHU;

亚博体育彩票        2) DUIJIANZHUCHANGDIDEBULIANGDIZHIZUOYONG,RUHUAPO、BENGTA、NISHILIU、YANRONG、TUDONGDENG,YOUMINGQUEPANDUAN、JIELUNHEFANGZHIFANGAN;

        3) DIXIASHUIWEIMAIZANGQINGKUANG、LEIXINGHESHUIWEIBIANHUAFUDUJIKANGFUSHEJISHUIWEI,TU、SHUIDEFUSHIXINGPINGJIA,DIXIASHUIFULIJISUANDESHEJISHUIWEI;

        4) KANGZHENSHEFANGQUANSHEFANGLIEDUTIGONGDEYEHUATUCENGZILIAO;

        5) YOUGUANDIJITUDONGZHANGXING、SHIXIANXING、PENGZHANGXINGPINGJIA。

亚博体育彩票    2 JIANZHUCHANGDIYUHUANJINGTIAOJIANDEYOUGUANZILIAO:

亚博体育彩票        1) JIANZHUCHANGDIXIANZHUANG,BAOKUOJIAOTONGSHESHI、GAOYAJIAKONGXIAN、DIXIAGUANXIANHEDIXIAGOUZHUWUDEFENBU;

        2) XIANGLINJIANZHUWUANQUANDENGJI、JICHUXINGSHIJIMAIZHISHENDU;

        3) FUJINLEISIGONGCHENGDIZHITIAOJIANCHANGDIDEZHUANGJIGONGCHENGSHIZHUANGZILIAOHEDANZHUANGCHENGZAILISHEJICANSHU;

        4) ZHOUWEIJIANZHUWUDEFANGZHEN、FANGZAOSHENGDEYAOQIU;

        5) NIJIANGPAIFANG、QITUTIAOJIAN;

亚博体育彩票        6) JIANZHUWUSUOZAIDIQUDEKANGZHENSHEFANGLIEDUHEJIANZHUCHANGDILEIBIE。

亚博体育彩票    3 JIANZHUWUDEYOUGUANZILIAO: 

亚博体育彩票        1) JIANZHUWUDEZONGPINGMIANBUZHITU;

亚博体育彩票        2) JIANZHUWUDEJIEGOULEIXING、HEZAI,JIANZHUWUDESHIYONGTIAOJIANHESHEBEIDUIJICHUSHUXIANGJISHUIPINGWEIYIDEYAOQIU;

        3) JIANZHUJIEGOUDEANQUANDENGJI。

    4 SHIGONGTIAOJIANDEYOUGUANZILIAO;

亚博体育彩票        1) SHIGONGJIXIESHEBEITIAOJIAN,ZHIZHUANGTIAOJIAN,DONGLITIAOJIAN,SHIGONGGONGYIDUIDIZHITIAOJIANDESHIYINGXING;

        2) SHUI、DIANJIYOUGUANJIANZHUCAILIAODEGONGYINGTIAOJIAN;

        3) SHIGONGJIXIEDEJINCHUCHANGJIXIANCHANGYUNXINGTIAOJIAN。

亚博体育彩票    5 GONGSHEJIBIJIAOYONGDEYOUGUANZHUANGXINGJISHISHIDEKEXINGXINGDEZILIAO。

3.2.2 桩基的详细勘察除应满足现行国家标准《岩土工程勘察规范》GB 50021的有关要求外,尚应满足下列要求:

    1 KANTANDIANJIANJU:

        1) DUIYUDUANCHENGXINGZHUANG(HANQIANYANZHUANG):ZHUYAOGENJUZHUANGDUANCHILICENGDINGMIANPODUJUEDING,YIWEI12~24m。DANGXIANGLINLIANGGEKANCHADIANJIELUCHUDEZHUANGDUANCHILICENGCENGMIANPODUDAYU10%HUOCHILICENGQIFUJIAODA、DICENGFENBUFUZASHI,YINGGENJUJUTIGONGCHENGTIAOJIANSHIDANGJIAMIKANTANDIAN。

        2) DUIYUMOCAXINGZHUANG:YIAN20~35mBUZHIKANTANKONG,DANYUDAOTUCENGDEXINGZHIHUOZHUANGTAIZAISHUIPINGFANGXIANGFENBUBIANHUAJIAODA,HUOCUNZAIKENENGYINGXIANGCHENGZHUANGDETUCENGSHI,YINGSHIDANGJIAMIKANTANDIAN。

        3) FUZADIZHITIAOJIANXIADEZHUXIADANZHUANGJICHUYINGANZHULIEXIANBUZHIKANTANDIAN,BINGYIMEIZHUANGSHEYIKANTANDIAN。

  2 勘探深度:

        1) YIBUZHI1/3~1/2DEKANTANKONGWEIKONGZHIXINGKONG。DUIYUSHEJIDENGJIWEIJIAJIDEJIANZHUZHUANGJI,ZHISHAOYINGBUZHI3GEKONGZHIXINGKONG;SHEJIDENGJIWEIYIJIDEJIANZHUZHUANGJI,ZHISHAOYINGBUZHI2GEKONGZHIXINGKONG。KONGZHIXINGKONGYINGCHUANTOUZHUANGDUANPINGMIANYIXIAYASUOCENGHOUDU;YIBANXINGKANTANKONGYINGSHENRUYUJIZHUANGDUANPINGMIANYIXIA3~5BEIZHUANGSHENSHEJIZHIJING,QIEBUDEXIAOYU3m;DUIYUDAZHIJINGZHUANG,BUDEXIAOYU5m。

亚博体育彩票        2) QIANYANZHUANGDEKONGZHIXINGZUANKONGYINGSHENRUYUJIZHUANGDUANPINGMIANYIXIABUXIAOYU3~5BEIZHUANGSHENSHEJIZHIJING,YIBANXINGZUANKONGYINGSHENRUYUJIZHUANGDUANPINGMIANYIXIABUXIAOYU1~3BEIZHUANGSHENSHEJIZHIJING。DANGCHILICENGJIAOBOSHI,YINGYOUBUFENZUANKONGZUANCHUANCHILIYANCENG。ZAIYANRONG、DUANCENGPOSUIDAIDIQU,YINGCHAMINGRONGDONG、RONGGOU、RONGCAO、SHISUNDENGDEFENBUQINGKUANG,ZUANKONGYINGZUANCHUANRONGDONGHUODUANCENGPOSUIDAIJINRUWENDINGTUCENG,JINRUSHENDUYINGMANZUSHANGSHUKONGZHIXINGZUANKONGHEYIBANXINGZUANKONGDEYAOQIU。

    3 在勘探深度范围内的每一地层,均应采取不扰动试样进行室内试验或根据土质情况选用有效的原位测试方法进行原位测试,提供设计所需参数。
▼ 展开条文说明


3.3 桩的选型与布置

亚博体育彩票3.3.1 JIZHUANGKEANXIALIEGUIDINGFENLEI:

    1 ANCHENGZAIXINGZHUANGFENLEI:

        1) MOCAXINGZHUANG;

亚博体育彩票        MOCAZHUANG:ZAICHENGZAINENGLIJIXIANZHUANGTAIXIA,ZHUANGDINGSHUXIANGHEZAIYOUZHUANGCEZULICHENGSHOU,ZHUANGDUANZULIXIAODAOKEHULVEBUJI;

        DUANCHENGMOCAZHUANG:ZAICHENGZAINENGLIJIXIANZHUANGTAIXIA,ZHUANGDINGSHUXIANGHEZAIZHUYAOYOUZHUANGCEZULICHENGSHOU。

亚博体育彩票        2) DUANCHENGXINGZHUANG:

        DUANCHENGZHUANG:ZAICHENGZAINENGLIJIXIANZHUANGTAIXIA,ZHUANGDINGSHUXIANGHEZAIYOUZHUANGDUANZULICHENGSHOU,ZHUANGCEZULIXIAODAOKEHULVEBUJI;

        MOCADUANCHENGZHUANG:ZAICHENGZAINENGLIJIXIANZHUANGTAIXIA,ZHUANGDINGSHUXIANGHEZAIZHUYAOYOUZHUANGDUANZULICHENGSHOU。

亚博体育彩票    2 ANCHENGZHUANGFANGFAFENLEI:

        1) FEIJITUZHUANG:GANZUOYEFAZUAN(WA)KONGGUANZHUZHUANG、NIJIANGHUBIFAZUAN(WA)KONGGUANZHUZHUANG,TAOGUANHUBIFAZUAN(WA)KONGGUANZHUZHUANG;

        2) BUFENJITUZHUANG:CHONGKONGGUANZHUZHUANG、ZUANKONGJIKUOGUANZHUZHUANG、JIAOBANJINGXINZHUANG、YUZUANKONGDARU(JINGYA)YUZHIZHUANG、DARU(JINGYA)SHICHANGKOUGANGGUANZHUANG、CHANGKOUYUYINGLIHUNNINGTUKONGXINZHUANGHEHXINGGANGZHUANG;

亚博体育彩票        3) JITUZHUANG:CHENGUANGUANZHUZHUANG、CHENGUANHANG(JI)KUOGUANZHUZHUANG、DARU(JINGYA)YUZHIZHUANG、BIKOUYUYINGLIHUNNINGTUKONGXINZHUANGHEBIKOUGANGGUANZHUANG。

亚博体育彩票    3 ANZHUANGJING(SHEJIZHIJINGd)DAXIAOFENLEI:

        1) XIAOZHIJINGZHUANG:d≤250mm;

        2) ZHONGDENGZHIJINGZHUANG:250mm<d<800mm;

亚博体育彩票        3) DAZHIJINGZHUANG:d≥800mm。

3.3.2 桩型与成桩工艺应根据建筑结构类型、荷载性质、桩的使用功能,穿越土层、桩端持力层、地下水位、施工设备、施工环境、施工经验、制桩材料供应条件等,按安全适用、经济合理的原则选择。选择时可按本规范附录A进行。

亚博体育彩票    1 DUIYUKUANGJIA-HEXINTONGDENGHEZAIFENBUHENBUJUNYUNDEZHUANGFAJICHU,YIXUANZEJIZHUANGCHICUNHECHENGZAILIKEDIAOXINGJIAODADEZHUANGXINGHEGONGYI。

亚博体育彩票    2 JITUCHENGUANGUANZHUZHUANGYONGYUYUNIHEYUNIZHITUCENGSHI,YINGJUXIANYUDUOCENGZHUZHAIZHUANGJI。

    3 抗震设防烈度为8度及以上地区,不宜采用预应力混凝土管桩(PC)和预应力混凝土空心方桩(PS)。
▼ 展开条文说明

3.3.3 基桩的布置应符合下列条件:

    1 基桩的最小中心距应符合表3.3.3的规定;当施工中采取减小挤土效应的可靠措施时,可根据当地经验适当减小。 
   

   2 PAILIEJIZHUANGSHI,YISHIZHUANGQUNCHENGZAILIHELIDIANYUSHUXIANGYONGJIUHEZAIHELIZUOYONGDIANZHONGHE,BINGSHIJIZHUANGSHOUSHUIPINGLIHELIJUJIAODAFANGXIANGYOUJIAODAKANGWANJIEMIANMOLIANG。

亚博体育彩票    3 DUIYUZHUANGXIANGJICHU、JIANLIQIANGJIEGOUZHUANGFA(HANPINGBANHELIANGBANSHICHENGTAI)JICHU,YIJIANGZHUANGBUZHIYUQIANGXIA。

    4 DUIYUKUANGJIA-HEXINTONGJIEGOUZHUANGFAJICHUYINGANHEZAIFENBUKAOLVXIANGHUYINGXIANG,JIANGZHUANGXIANGDUIJIZHONGBUZHIYUHEXINTONGHEZHUXIA;WAIWEIKUANGJIAZHUYICAIYONGFUHEZHUANGJI,YOUHESHIZHUANGDUANCHILICENGSHI,ZHUANGZHANGYIJIANXIAO。

    5 YINGXUANZEJIAOYINGTUCENGZUOWEIZHUANGDUANCHILICENG。ZHUANGDUANQUANDUANMIANJINRUCHILICENGDESHENDU,DUIYUNIANXINGTU、FENTUBUYIXIAOYU2d,SHATUBUYIXIAOYU1.5d,SUISHILEITUBUYIXIAOYU1d。DANGCUNZAIRUANRUOXIAWOCENGSHI,ZHUANGDUANYIXIAYINGCHILICENGHOUDUBUYIXIAOYU3d。

    6 对于嵌岩桩,嵌岩深度应综合荷载、上覆土层、基岩、桩径、桩长诸因素确定;对于嵌入倾斜的完整和较完整岩的全断面深度不宜小于0.4d且不小于0.5m,倾斜度大于30%的中风化岩,宜根据倾斜度及岩石完整性适当加大嵌岩深度;对于嵌入平整、完整的坚硬岩和较硬岩的深度不宜小于0.2d,且不应小于0.2m。
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3.4 特殊条件下的桩基

亚博体育彩票3.4.1 RUANTUDIJIDEZHUANGJISHEJIYUANZEYINGFUHEXIALIEGUIDING:

    1 RUANTUZHONGDEZHUANGJIYIXUANZEZHONG、DIYASUOXINGTUCENGZUOWEIZHUANGDUANCHILICENG;

    2 ZHUANGZHOUWEIRUANTUYINZIZHONGGUJIE、CHANGDITIANTU、DIMIANDAMIANJIDUIZAI、JIANGDIDIXIASHUIWEI、DAMIANJIJITUCHENZHUANGDENGYUANYINERCHANSHENGDECHENJIANGDAYUJIZHUANGDECHENJIANGSHI,YINGSHIJUTIGONGCHENGQINGKUANGFENXIJISUANZHUANGCEFUMOZULIDUIJIZHUANGDEYINGXIANG;

亚博体育彩票    3 CAIYONGJITUZHUANGHEBUFENJITUZHUANGSHI,YINGCAIQUXIAOJIANKONGXISHUIYALIHEJITUXIAOYINGDEJISHUCUOSHI,BINGYINGKONGZHICHENZHUANGSULV,JIANXIAOJITUXIAOYINGDUICHENGZHUANGZHILIANG、LINJINJIANZHUWU、DAOLU、DIXIAGUANXIANHEJIKENGBIANPODENGCHANSHENGDEBULIYINGXIANG;

    4 先成桩后开挖基坑时,必须合理安排基坑挖土顺序和控制分层开挖的深度,防止土体侧移对桩的影响。
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3.4.2 湿陷性黄土地区的桩基设计原则应符合下列规定:

    1 JIZHUANGYINGCHUANTOUSHIXIANXINGHUANGTUCENG,ZHUANGDUANYINGZHICHENGZAIYASUOXINGDIDENIANXINGTU、FENTU、ZHONGMIHEMISHISHATUYIJISUISHILEITUCENGZHONG;

    2 SHIXIANXINGHUANGTUDIJIZHONG,SHEJIDENGJIWEIJIA、YIJIJIANZHUZHUANGJIDEDANZHUANGJIXIANCHENGZAILI,YIYIJINSHUIZAIHESHIYANWEIZHUYAOYIJU;

    3 自重湿陷性黄土地基中的单桩极限承载力,应根据工程具体情况分析计算桩侧负摩阻力的影响。
▼ 展开条文说明

3.4.3 季节性冻土和膨胀土地基中的桩基设计原则应符合下列规定:

亚博体育彩票    1 ZHUANGDUANJINRUDONGSHENXIANHUOPENGZHANGTUDEDAQIYINGXIANGJIJUCENGYIXIADESHENDU,YINGMANZUKANGBAWENDINGXINGYANSUANYAOQIU,QIEBUDEXIAOYU4BEIZHUANGJINGJI1BEIKUODADUANZHIJING,ZUIXIAOSHENDUYINGDAYU1.5m;

    2 WEIJIANXIAOHEXIAOCHUDONGZHANGHUOPENGZHANGDUIZHUANGJIDEZUOYONG,YICAIYONGZUAN(WA)KONGGUANZHUZHUANG;

亚博体育彩票    3 QUEDINGJIZHUANGSHUXIANGJIXIANCHENGZAILISHI,CHUBUJIRUDONGZHANG、PENGZHANGSHENDUFANWEINEIZHUANGCEZULIWAI,HAIYINGKAOLVDIJITUDEDONGZHANG、PENGZHANGZUOYONG,YANSUANZHUANGJIDEKANGBAWENDINGXINGHEZHUANGSHENSHOULACHENGZAILI;

    4 为消除桩基受冻胀或膨胀作用的危害,可在冻胀或膨胀深度范围内,沿桩周及承台作隔冻、隔胀处理。
▼ 展开条文说明

3.4.4 岩溶地区的桩基设计原则应符合下列规定:

亚博体育彩票    1 YANRONGDIQUDEZHUANGJI,YICAIYONGZUAN、CHONGKONGZHUANG;

亚博体育彩票    2 DANGDANZHUANGHEZAIJIAODA,YANCENGMAISHENJIAOQIANSHI,YICAIYONGQIANYANZHUANG;

    3 当基岩面起伏很大且埋深较大时,宜采用摩擦型灌注桩。
▼ 展开条文说明

3.4.5 坡地、岸边桩基的设计原则应符合下列规定:

    1 DUIJIANYUPODI、ANBIANDEZHUANGJI,BUDEJIANGZHUANGZHICHENGYUBIANPOQIANZAIDEHUADONGTISHANG。ZHUANGDUANJINRUQIANZAIHUALIEMIANYIXIAWENDINGYANTUCENGNEIDESHENDU,YINGNENGBAOZHENGZHUANGJIDEWENDING;

    2 JIANZHUZHUANGJIYUBIANPOYINGBAOCHIYIDINGDESHUIPINGJULI;JIANZHUCHANGDINEIDEBIANPOBIXUSHIWANQUANWENDINGDEBIANPO,DANGYOUBENGTA、HUAPODENGBULIANGDIZHIXIANXIANGCUNZAISHI,YINGANXIANXINGGUOJIABIAOZHUN《JIANZHUBIANPOGONGCHENGJISHUGUIFAN》GB 50330DEGUIDINGJINXINGZHENGZHI,QUEBAOQIWENDINGXING;

亚博体育彩票    3 XINJIANPODI、ANBIANJIANZHUZHUANGJIGONGCHENGYINGYUJIANZHUBIANPOGONGCHENGTONGYIGUIHUA,TONGBUSHEJI,HELIQUEDINGSHIGONGSHUNXU;

    4 BUYICAIYONGJITUZHUANG;

    5 应验算最不利荷载效应组合下桩基的整体稳定性和基桩水平承载力。
▼ 展开条文说明

3.4.6 抗震设防区桩基的设计原则应符合下列规定:

亚博体育彩票    1 ZHUANGJINRUYEHUATUCENGYIXIAWENDINGTUCENGDEZHANGDU(BUBAOKUOZHUANGJIANBUFEN)YINGANJISUANQUEDING;DUIYUSUISHITU,LI、CU、ZHONGSHA,MISHIFENTU,JIANYINGNIANXINGTUSHANGBUYINGXIAOYU(2~3)d,DUIQITAFEIYANSHITUSHANGBUYIXIAOYU(4~5)d;

    2 CHENGTAIHEDIXIASHICEQIANGZHOUWEIYINGCAIYONGHUITU、JIPEISHASHI、YASHIXINGJIAOHAODESUTUHUITIAN,BINGFENCENGHANGSHI,YEKECAIYONGSUHUNNINGTUHUITIANHUOJIAOBANLIUDONGXINGSHUINITUHUITIAN;

亚博体育彩票    3 DANGCHENGTAIZHOUWEIWEIKEYEHUATUHUODIJICHENGZAILITEZHENGZHIXIAOYU40kPa(HUOBUPAISHUIKANGJIANQIANGDUXIAOYU15kPa)DERUANTU,QIEZHUANGJISHUIPINGCHENGZAILIBUMANZUJISUANYAOQIUSHI,KEJIANGCHENGTAIWAIMEICE1/2CHENGTAIBIANZHANGFANWEINEIDETUJINXINGJIAGU;

    4 对于存在液化扩展的地段,应验算桩基在土流动的侧向作用力下的稳定性。
▼ 展开条文说明

3.4.7 可能出现负摩阻力的桩基设计原则应符合下列规定:

    1 DUIYUTIANTUJIANZHUCHANGDI,YIXIANTIANTUBINGBAOZHENGTIANTUDEMISHIXING,RUANTUCHANGDITIANTUQIANYINGCAIQUYUSHESULIAOPAISHUIBANDENGCUOSHI,DAITIANTUDIJICHENJIANGJIBENWENDINGHOUFANGKECHENGZHUANG;

亚博体育彩票    2 DUIYUYOUDIMIANDAMIANJIDUIZAIDEJIANZHUWU,YINGCAIQUJIANXIAODIMIANCHENJIANGDUIJIANZHUWUZHUANGJIYINGXIANGDECUOSHI;

    3 DUIYUZIZHONGSHIXIANXINGHUANGTUDIJI,KECAIYONGQIANGHANG、JIMITUZHUANGDENGXIANXINGCHULI,XIAOCHUSHANGBUHUOQUANBUTUDEZIZHONGSHIXIAN:DUIYUQIANGUJIETUYICAIQUXIANQIPAISHUIYUYADENGCUOSHI;

亚博体育彩票    4 DUIYUJITUCHENZHUANG,YINGCAIQUXIAOJIANCHAOKONGXISHUIYALI、KONGZHICHENZHUANGSULVDENGCUOSHI;

    5 对于中性点以上的桩身可对表面进行处理,以减少负摩阻力。
▼ 展开条文说明

3.4.8 抗拔桩基的设计原则应符合下列规定:

    1 YINGGENJUHUANJINGLEIBIEJISHUI、TUDUIGANGJINDEFUSHI、GANGJINZHONGLEIDUIFUSHIDEMINGANXINGHEHEZAIZUOYONGSHIJIANDENGYINSUQUEDINGKANGBAZHUANGDELIEFENGKONGZHIDENGJI;

    2 DUIYUYANGEYAOQIUBUCHUXIANLIEFENGDEYIJILIEFENGKONGZHIDENGJI,ZHUANGSHENYINGSHEZHIYUYINGLIJIN;DUIYUYIBANYAOQIUBUCHUXIANLIEFENGDEERJILIEFENGKONGZHIDENGJI,ZHUANGSHENYISHEZHIYUYINGLIJIN;

亚博体育彩票    3 DUIYUSANJILIEFENGKONGZHIDENGJI,YINGJINXINGZHUANGSHENLIEFENGKUANDUJISUAN;

    4 当基桩抗拔承载力要求较高时,可采用桩侧后注浆、扩底等技术措施。
▼ 展开条文说明


3.5 耐久性规定

3.5.1 ZHUANGJIJIEGOUDENAIJIUXINGYINGGENJUSHEJISHIYONGNIANXIAN、XIANXINGGUOJIABIAOZHUN《HUNNINGTUJIEGOUSHEJIGUIFAN》GB 50010DEHUANJINGLEIBIEGUIDINGYIJISHUI、TUDUIGANG、HUNNINGTUFUSHIXINGDEPINGJIAJINXINGSHEJI。

3.5.2 二类和三类环境中,设计使用年限为50年的桩基结构混凝土耐久性应符合表3.5.2的规定。

   
▼ 展开条文说明

3.5.3 桩身裂缝控制等级及最大裂缝宽度应根据环境类别和水土介质腐蚀性等级按表3.5.3规定选用。

   
▼ 展开条文说明

3.5.4 四类、五类环境桩基结构耐久性设计可按国家现行标准《港口工程混凝土结构设计规范》JTJ 267和《工业建筑防腐蚀设计规范》GB 50046等执行。

3.5.5 对三、四、五类环境桩基结构,受力钢筋宜采用环氧树脂涂层带肋钢筋。


4桩基构造

4.1 桩基构造

ⅠGUANZHUZHUANG

4.1.1 灌注桩应按下列规定配筋:

    1 PEIJINLV:DANGZHUANGSHENZHIJINGWEI300~2000mmSHI,ZHENGJIEMIANPEIJINLVKEQU0.65%~0.2%(XIAOZHIJINGZHUANGQUGAOZHI);DUISHOUHEZAITEBIEDADEZHUANG、KANGBAZHUANGHEQIANYANDUANCHENGZHUANGYINGGENJUJISUANQUEDINGPEIJINLV,BINGBUYINGXIAOYUSHANGSHUGUIDINGZHI;

    2 PEIJINZHANGDU:

        1) DUANCHENGXINGZHUANGHEWEIYUPODI、ANBIANDEJIZHUANGYINGYANZHUANGSHENDENGJIEMIANHUOBIANJIEMIANTONGZHANGPEIJIN;

        2) MOCAXINGGUANZHUZHUANGPEIJINZHANGDUBUYINGXIAOYU2/3ZHUANGZHANG;DANGSHOUSHUIPINGHEZAISHI,PEIJINZHANGDUSHANGBUYIXIAOYU4.0/α(αWEIZHUANGDESHUIPINGBIANXINGXISHU);

亚博体育彩票        3) DUIYUSHOUDIZHENZUOYONGDEJIZHUANG,ZHUANGSHENPEIJINZHANGDUYINGCHUANGUOKEYEHUATUCENGHERUANRUOTUCENG,JINRUWENDINGTUCENGDESHENDUBUYINGXIAOYUBENGUIFANDI3.4.6TIAODEGUIDING;

        4) SHOUFUMOZULIDEZHUANG、YINXIANCHENGZHUANGHOUKAIWAJIKENGERSUIDIJITUHUIDANDEZHUANG,QIPEIJINZHANGDUYINGCHUANGUORUANRUOTUCENGBINGJINRUWENDINGTUCENG,JINRUDESHENDUBUYINGXIAOYU(2~3)d;

亚博体育彩票        5) KANGBAZHUANGJIYINDIZHENZUOYONG、DONGZHANGHUOPENGZHANGLIZUOYONGERSHOUBALIDEZHUANG,YINGDENGJIEMIANHUOBIANJIEMIANTONGZHANGPEIJIN。

    3 DUIYUSHOUSHUIPINGHEZAIDEZHUANG,ZHUJINBUYINGXIAOYU8ф12;DUIYUKANGYAZHUANGHEKANGBAZHUANG,ZHUJINBUYINGSHAOYU6ф10;ZONGXIANGZHUJINYINGYANZHUANGSHENZHOUBIANJUNYUNBUZHI,QIJINGJUBUYINGXIAOYU60mm;

    4 箍筋应采用螺旋式,直径不应小于6mm,间距宜为200~300mm;受水平荷载较大的桩基、承受水平地震作用的桩基以及考虑主筋作用计算桩身受压承载力时,桩顶以下5d范围内的箍筋应加密,间距不应大于100mm;当桩身位于液化土层范围内时箍筋应加密;当考虑箍筋受力作用时,箍筋配置应符合现行国家标准《混凝土结构设计规范》GB 50010的有关规定;当钢筋笼长度超过4m时,应每隔2m设一道直径不小于12mm的焊接加劲箍筋。
▼ 展开条文说明

4.1.2 桩身混凝土及混凝土保护层厚度应符合下列要求:

亚博体育彩票    1 ZHUANGSHENHUNNINGTUQIANGDUDENGJIBUDEXIAOYUC25,HUNNINGTUYUZHIZHUANGJIANQIANGDUDENGJIBUDEXIAOYUC30;

亚博体育彩票    2 GUANZHUZHUANGZHUJINDEHUNNINGTUBAOHUCENGHOUDUBUYINGXIAOYU35mm,SHUIXIAGUANZHUZHUANGDEZHUJINHUNNINGTUBAOHUCENGHOUDUBUDEXIAOYU50mm;

    3 四类、五类环境中桩身混凝土保护层厚度应符合国家现行标准《港口工程混凝土结构设计规范》JTJ 267、《工业建筑防腐蚀设计规范》GB 50046的相关规定。
▼ 展开条文说明

4.1.3 扩底灌注桩扩底端尺寸应符合下列规定(见图4.1.3):

    1 DUIYUCHILICENGCHENGZAILIJIAOGAO、SHANGFUTUCENGJIAOCHADEKANGYAZHUANGHEZHUANGDUANYISHANGYOUYIDINGHOUDUJIAOHAOTUCENGDEKANGBAZHUANG,KECAIYONGKUODI;KUODIDUANZHIJINGYUZHUANGSHENZHIJINGZHIBID/d,YINGGENJUCHENGZAILIYAOQIUJIKUODIDUANCEMIANHEZHUANGDUANCHILICENGTUXINGTEZHENGYIJIKUODISHIGONGFANGFAQUEDING,WAKONGZHUANGDED/dBUYINGDAYU3,ZUANKONGZHUANGDED/dBUYINGDAYU2.5;

    2 KUODIDUANCEMIANDEXIELVYINGGENJUSHIJICHENGKONGJITUTIZILITIAOJIANQUEDING,a/hcKEQU1/4~1/2,SHATUKEQU1/4,FENTU、NIANXINGTUKEQU1/3~1/2;

    3 KANGYAZHUANGKUODIDUANDIMIANYICHENGGUODIXING,SHIGAOhbKEQU(0.15~0.20)D。

ⅡHUNNINGTUYUZHIZHUANG

亚博体育彩票4.1.4 HUNNINGTUYUZHIZHUANGDEJIEMIANBIANZHANGBUYINGXIAOYU200mm;YUYINGLIHUNNINGTUYUZHISHIXINZHUANGDEJIEMIANBIANZHANGBUYIXIAOYU350mm。

4.1.5 预制桩的混凝土强度等级不宜低于C30;预应力混凝土实心桩的混凝土强度等级不应低于C40;预制桩纵向钢筋的混凝土保护层厚度不宜小于30mm。

4.1.6 预制桩的桩身配筋应按吊运、打桩及桩在使用中的受力等条件计算确定。采用锤击法沉桩时,预制桩的最小配筋率不宜小于0.8%。静压法沉桩时,最小配筋率不宜小于0.6%,主筋直径不宜小于14mm,打入桩桩顶以下(4~5)d长度范围内箍筋应加密,并设置钢筋网片。

4.1.7 预制桩的分节长度应根据施工条件及运输条件确定;每根桩的接头数量不宜超过3个。

4.1.8 预制桩的桩尖可将主筋合拢焊在桩尖辅助钢筋上,对于持力层为密实砂和碎石类土时,宜在桩尖处包以钢钣桩靴,加强桩尖。

ⅢYUYINGLIHUNNINGTUKONGXINZHUANG

4.1.9 YUYINGLIHUNNINGTUKONGXINZHUANGANJIEMIANXINGSHIKEFENWEIGUANZHUANG、KONGXINFANGZHUANG;ANHUNNINGTUQIANGDUDENGJIKEFENWEIYUYINGLIGAOQIANGHUNNINGTUGUANZHUANG(PHC)HEKONGXINFANGZHUANG(PHS)、YUYINGLIHUNNINGTUGUANZHUANG(PC)HEKONGXINFANGZHUANG(PS)。

    LIXINCHENGXINGDEXIANZHANGFAYUYINGLIHUNNINGTUZHUANGDEJIEMIANCHICUN、PEIJIN、ZHUANGSHENJIXIANWANJU、ZHUANGSHENSHUXIANGSHOUYACHENGZAILISHEJIZHIDENGCANSHUKEANBENGUIFANFULUBQUEDING。

4.1.10 预应力混凝土空心桩桩尖形式宜根据地层性质选择闭口形或敞口形;闭口形分为平底十字形和锥形。

4.1.11 预应力混凝土空心桩质量要求,尚应符合国家现行标准《先张法预应力混凝土管桩》GB 13476和《预应力混凝土空心方桩》JG 197及其他的有关标准规定。

4.1.12 预应力混凝土桩的连接可采用端板焊接连接、法兰连接、机械啮合连接、螺纹连接。每根桩的接头数量不宜超过3个。

4.1.13 桩端嵌入遇水易软化的强风化岩、全风化岩和非饱和土的预应力混凝土空心桩,沉桩后,应对桩端以上约2m范围内采取有效的防渗措施,可采用微膨胀混凝土填芯或在内壁预涂柔性防水材料。
▼ 展开条文说明

ⅣGANGZHUANG

4.1.14 GANGZHUANGKECAIYONGGUANXING、HXINGHUOQITAYIXINGGANGCAI。

4.1.15 钢桩的分段长度宜为12~15m。

4.1.16 钢桩焊接接头应采用等强度连接。

4.1.17 钢桩的端部形式,应根据桩所穿越的土层、桩端持力层性质、桩的尺寸、挤土效应等因素综合考虑确定,并可按下列规定采用:

亚博体育彩票    1 GANGGUANZHUANGKECAIYONGXIALIEZHUANGDUANXINGSHI:

亚博体育彩票        1) CHANGKOU:

亚博体育彩票        DAIJIAQIANGGU(DAINEIGEBAN、BUDAINEIGEBAN);BUDAIJIAQIANGGU(DAINEIGEBAN、BUDAINEIGEBAN)。

亚博体育彩票        2) BIKOU:

        PINGDI;ZHUIDI。

亚博体育彩票    2 HXINGGANGZHUANGKECAIYONGXIALIEZHUANGDUANXINGSHI: 

        1) DAIDUANBAN;

亚博体育彩票        2) BUDAIDUANBAN:

        ZHUIDI;

        PINGDI(DAIKUODAYI、BUDAIKUODAYI)。

4.1.18 钢桩的防腐处理应符合下列规定:

    1 GANGZHUANGDEFUSHISULVDANGWUSHICEZILIAOSHIKEANBIAO4.1.18QUEDING;

    2 GANGZHUANGFANGFUCHULIKECAIYONGWAIBIAOMIANTUFANGFUCENG、ZENGJIAFUSHIYULIANGJIYINJIBAOHU;DANGGANGGUANZHUANGNEIBITONGWAIJIEGEJUESHI,KEBUKAOLVNEIBIFANGFU。


4.2 承台构造

亚博体育彩票4.2.1 ZHUANGJICHENGTAIDEGOUZAO,CHUYINGMANZUKANGCHONGQIE、KANGJIANQIE、KANGWANCHENGZAILIHESHANGBUJIEGOUYAOQIUWAI,SHANGYINGFUHEXIALIEYAOQIU:

    1 ZHUXIADULIZHUANGJICHENGTAIDEZUIXIAOKUANDUBUYINGXIAOYU500mm,BIANZHUANGZHONGXINZHICHENGTAIBIANYUANDEJULIBUYINGXIAOYUZHUANGDEZHIJINGHUOBIANZHANG,QIEZHUANGDEWAIBIANYUANZHICHENGTAIBIANYUANDEJULIBUYINGXIAOYU150mm。DUIYUQIANGXIATIAOXINGCHENGTAILIANG,ZHUANGDEWAIBIANYUANZHICHENGTAILIANGBIANYUANDEJULIBUYINGXIAOYU75mm。CHENGTAIDEZUIXIAOHOUDUBUYINGXIAOYU300mm。

亚博体育彩票    2 GAOCENGJIANZHUPINGBANSHIHELIANGBANSHIFAXINGCHENGTAIDEZUIXIAOHOUDUBUYINGXIAOYU400mm,DUOCENGJIANZHUQIANGXIABUZHUANGDEJIANLIQIANGJIEGOUFAXINGCHENGTAIDEZUIXIAOHOUDUBUYINGXIAOYU200mm。 

    3 高层建筑箱形承台的构造应符合《高层建筑筏形与箱形基础技术规范》JGJ 6的规定。
▼ 展开条文说明

4.2.2 承台混凝土材料及其强度等级应符合结构混凝土耐久性的要求和抗渗要求。
▼ 展开条文说明

4.2.3 承台的钢筋配置应符合下列规定:

亚博体育彩票    1 ZHUXIADULIZHUANGJICHENGTAIGANGJINYINGTONGZHANGPEIZHI[JIANTU4.2.3(a)],DUISIZHUANGYISHANG(HANSIZHUANG)CHENGTAIYIANSHUANGXIANGJUNYUNBUZHI,DUISANZHUANGDESANJIAOXINGCHENGTAIYINGANSANXIANGBANDAIJUNYUNBUZHI,QIEZUILIMIANDESANGENGANGJINWEICHENGDESANJIAOXINGYINGZAIZHUJIEMIANFANWEINEI[JIANTU4.2.3(b)]。GANGJINMAOGUZHANGDUZIBIANZHUANGNEICE(DANGWEIYUANZHUANGSHI,YINGJIANGQIZHIJINGCHENGYI0.8DENGXIAOWEIFANGZHUANG)SUANQI,BUYINGXIAOYU35dg(dgWEIGANGJINZHIJING);DANGBUMANZUSHIYINGJIANGGANGJINXIANGSHANGWANZHE,CISHISHUIPINGDUANDEZHANGDUBUYINGXIAOYU25dg,WANZHEDUANZHANGDUBUYINGXIAOYU10dg。CHENGTAIZONGXIANGSHOULIGANGJINDEZHIJINGBUYINGXIAOYU12mm,JIANJUBUYINGDAYU200mm。ZHUXIADULIZHUANGJICHENGTAIDEZUIXIAOPEIJINLVBUYINGXIAOYU0.15%。

    2 柱下独立两桩承台,应按现行国家标准《混凝土结构设计规范》GB 50010中的深受弯构件配置纵向受拉钢筋、水平及竖向分布钢筋。承台纵向受力钢筋端部的锚固长度及构造应与柱下多桩承台的规定相同。    
   

    3 TIAOXINGCHENGTAILIANGDEZONGXIANGZHUJINYINGFUHEXIANXINGGUOJIABIAOZHUN《HUNNINGTUJIEGOUSHEJIGUIFAN》GB 50010GUANYUZUIXIAOPEIJINLVDEGUIDING,ZHUJINZHIJINGBUYINGXIAOYU12mm,JIALIJINZHIJINGBUYINGXIAOYU10mm,GUJINZHIJINGBUYINGXIAOYU6mm(TU4.2.3-C)。

    4 FAXINGCHENGTAIBANHUOXIANGXINGCHENGTAIBANZAIJISUANZHONGDANGJINKAOLVJUBUWANJUZUOYONGSHI,KAOLVDAOZHENGTIWANQUDEYINGXIANG,ZAIZONGHENGLIANGGEFANGXIANGDEXIACENGGANGJINPEIJINLVBUYIXIAOYU0.15%;SHANGCENGGANGJINYINGANJISUANPEIJINLVQUANBULIANTONG。DANGFABANDEHOUDUDAYU2000mmSHI,YIZAIBANHOUZHONGJIANBUWEISHEZHIZHIJINGBUXIAOYU12mm、JIANJUBUDAYU300mmDESHUANGXIANGGANGJINWANG。

    5 承台底面钢筋的混凝土保护层厚度,当有混凝土垫层时,不应小于50mm,无垫层时不应小于70mm;此外尚不应小于桩头嵌入承台内的长度。
▼ 展开条文说明

4.2.4 桩与承台的连接构造应符合下列规定:

    1 ZHUANGQIANRUCHENGTAINEIDEZHANGDUDUIZHONGDENGZHIJINGZHUANGBUYIXIAOYU50mm;DUIDAZHIJINGZHUANGBUYIXIAOYU100mm。

    2 HUNNINGTUZHUANGDEZHUANGDINGZONGXIANGZHUJINYINGMAORUCHENGTAINEI,QIMAORUZHANGDUBUYIXIAOYU35BEIZONGXIANGZHUJINZHIJING。DUIYUKANGBAZHUANG,ZHUANGDINGZONGXIANGZHUJINDEMAOGUZHANGDUYINGANXIANXINGGUOJIABIAOZHUN《HUNNINGTUJIEGOUSHEJIGUIFAN》GB 50010QUEDING。

    3 对于大直径灌注桩,当采用一柱一桩时可设置承台或将桩与柱直接连接。
▼ 展开条文说明

4.2.5 柱与承台的连接构造应符合下列规定:

    1 DUIYUYIZHUYIZHUANGJICHU,ZHUYUZHUANGZHIJIELIANJIESHI,ZHUZONGXIANGZHUJINMAORUZHUANGSHENNEIZHANGDUBUYINGXIAOYU35BEIZONGXIANGZHUJINZHIJING。

亚博体育彩票    2 DUIYUDUOZHUANGCHENGTAI,ZHUZONGXIANGZHUJINYINGMAORUCHENGTAIBUXIAOYU35BEIZONGXIANGZHUJINZHIJING;DANGCHENGTAIGAODUBUMANZUMAOGUYAOQIUSHI,SHUXIANGMAOGUZHANGDUBUYINGXIAOYU20BEIZONGXIANGZHUJINZHIJING,BINGXIANGZHUZHOUXIANFANGXIANGCHENG90°WANZHE。

    3 DANGYOUKANGZHENSHEFANGYAOQIUSHI,DUIYUYI、ERJIKANGZHENDENGJIDEZHU,ZONGXIANGZHUJINMAOGUZHANGDUYINGCHENGYI1.15DEXISHU;DUIYUSANJIKANGZHENDENGJIDEZHU,ZONGXIANGZHUJINMAOGUZHANGDUYINGCHENGYI1.05DEXISHU。

4.2.6 承台与承台之间的连接构造应符合下列规定:

    1 YIZHUYIZHUANGSHI,YINGZAIZHUANGDINGLIANGGEZHUZHOUFANGXIANGSHANGSHEZHILIANXILIANG。DANGZHUANGYUZHUDEJIEMIANZHIJINGZHIBIDAYU2SHI,KEBUSHELIANXILIANG。

    2 LIANGZHUANGZHUANGJIDECHENGTAI,YINGZAIQIDUANXIANGSHEZHILIANXILIANG。

亚博体育彩票    3 YOUKANGZHENSHEFANGYAOQIUDEZHUXIAZHUANGJICHENGTAI,YIYANLIANGGEZHUZHOUFANGXIANGSHEZHILIANXILIANG。

    4 LIANXILIANGDINGMIANYIYUCHENGTAIDINGMIANWEIYUTONGYIBIAOGAO。LIANXILIANGKUANDUBUYIXIAOYU250mm,QIGAODUKEQUCHENGTAIZHONGXINJUDE1/10~1/15,QIEBUYIXIAOYU400mm。

    5 连系梁配筋应按计算确定,梁上下部配筋不宜小于2根直径12mm钢筋;位于同一轴线上的相邻跨连系梁纵筋应连通。
▼ 展开条文说明

4.2.7 承台和地下室外墙与基坑侧壁间隙应灌注素混凝土或搅拌流动性水泥土,或采用灰土、级配砂石、压实性较好的素土分层夯实,其压实系数不宜小于0.94。
▼ 展开条文说明


5桩基计算

5.1 桩顶作用效应计算

5.1.1 DUIYUYIBANJIANZHUWUHESHOUSHUIPINGLI(BAOKUOLIJUYUSHUIPINGJIANLI)JIAOXIAODEGAOCENGJIANZHUQUNZHUANGJICHU,YINGANXIALIEGONGSHIJISUANZHU、QIANG、HEXINTONGQUNZHUANGZHONGJIZHUANGHUOFUHEJIZHUANGDEZHUANGDINGZUOYONGXIAOYING:

    1 SHUXIANGLI

亚博体育彩票    ZHOUXINSHUXIANGLIZUOYONGXIA

 

 


▼ 展开条文说明

5.1.2 对于主要承受竖向荷载的抗震设防区低承台桩基,在同时满足下列条件时,桩顶作用效应计算可不考虑地震作用;

    1 ANXIANXINGGUOJIABIAOZHUN《JIANZHUKANGZHENSHEJIGUIFAN》GB 50011GUIDINGKEBUJINXINGZHUANGJIKANGZHENCHENGZAILIYANSUANDEJIANZHUWU;

    2 JIANZHUCHANGDIWEIYUJIANZHUKANGZHENDEYOULIDIDUAN。

5.1.3 属于下列情况之一的桩基,计算各基桩的作用效应、桩身内力和位移时,宜考虑承台(包括地下墙体)与基桩协同工作和土的弹性抗力作用,其计算方法可按本规范附录C进行:

亚博体育彩票    1 WEIYU8DUHE8DUYISHANGKANGZHENSHEFANGQUDEJIANZHU,DANGQIZHUANGJICHENGTAIGANGDUJIAODAHUOYOUYUSHANGBUJIEGOUYUCHENGTAIXIETONGZUOYONGNENGZENGQIANGCHENGTAIDEGANGDUSHI;

    2 其他受较大水平力的桩基。
▼ 展开条文说明


5.2 桩基竖向承载力计算


▼ 展开条文说明

5.2.3 DUIYUDUANCHENGXINGZHUANGJI、ZHUANGSHUSHAOYU4GENDEMOCAXINGZHUXIADULIZHUANGJI、HUOYOUYUDICENGTUXING、SHIYONGTIAOJIANDENGYINSUBUYIKAOLVCHENGTAIXIAOYINGSHI,JIZHUANGSHUXIANGCHENGZAILITEZHENGZHIYINGQUDANZHUANGSHUXIANGCHENGZAILITEZHENGZHI。

5.2.4 对于符合下列条件之一的摩擦型桩基,宜考虑承台效应确定其复合基桩的竖向承载力特征值:

    1 SHANGBUJIEGOUZHENGTIGANGDUJIAOHAO、TIXINGJIANDANDEJIAN(GOU)ZHUWU;

亚博体育彩票    2 DUICHAYICHENJIANGSHIYINGXINGJIAOQIANGDEPAIJIAJIEGOUHEROUXINGGOUZHUWU;

亚博体育彩票    3 ANBIANGANGDUDIAOPINGYUANZESHEJIDEZHUANGJIGANGDUXIANGDUIRUOHUAQU;

    4 软土地基的减沉复合疏桩基础。
▼ 展开条文说明

5.2.5 考虑承台效应的复合基桩竖向承载力特征值可按下列公式确定: 

当承台底为可液化土、湿陷性土、高灵敏度软土、欠固结土、新填土时,沉桩引起超孔隙水压力和土体隆起时,不考虑承台效应,取ηc=0。


▼ 展开条文说明

5.3 单桩竖向极限承载力

Ⅰ一般规定

5.3.1 设计采用的单桩竖向极限承载力标准值应符合下列规定;

    1 SHEJIDENGJIWEIJIAJIDEJIANZHUZHUANGJI,YINGTONGGUODANZHUANGJINGZAISHIYANQUEDING;

亚博体育彩票    2 SHEJIDENGJIWEIYIJIDEJIANZHUZHUANGJI,DANGDIZHITIAOJIANJIANDANSHI,KECANZHAODIZHITIAOJIANXIANGTONGDESHIZHUANGZILIAO,JIEHEJINGLICHUTANDENGYUANWEICESHIHEJINGYANCANSHUZONGHEQUEDING;QIYUJUNYINGTONGGUODANZHUANGJINGZAISHIYANQUEDING;

    3 设计等级为丙级的建筑桩基,可根据原位测试和经验参数确定。
▼ 展开条文说明

5.3.2 单桩竖向极限承载力标准值、极限侧阻力标准值和极限端阻力标准值应按下列规定确定;

亚博体育彩票    1 DANZHUANGSHUXIANGJINGZAISHIYANYINGANXIANXINGXINGYEBIAOZHUN《JIANZHUJIZHUANGJIANCEJISHUGUIFAN》JGJ 106ZHIXING;

    2 DUIYUDAZHIJINGDUANCHENGXINGZHUANG,YEKETONGGUOSHENCENGPINGBAN(PINGBANZHIJINGYINGYUKONGJINGYIZHI)ZAIHESHIYANQUEDINGJIXIANDUANZULI;

亚博体育彩票    3 DUIYUQIANYANZHUANG,KETONGGUOZHIJINGWEI0.3mYANJIPINGBANZAIHESHIYANQUEDINGJIXIANDUANZULIBIAOZHUNZHI,YEKETONGGUOZHIJINGWEI0.3mQIANYANDUANDUNZAIHESHIYANQUEDINGJIXIANCEZULIBIAOZHUNZHIHEJIXIANDUANZULIBIAOZHUNZHI;

    4 桩的极限侧阻力标准值和极限端阻力标准值宜通过埋设桩身轴力测试元件由静载试验确定。并通过测试结果建立极限侧阻力标准值和极限端阻力标准值与土层物理指标、岩石饱和单轴抗压强度以及与静力触探等土的原位测试指标间的经验关系,以经验参数法确定单桩竖向极限承载力。
▼ 展开条文说明

Ⅱ原位测试法

5.3.3 当根据单桥探头静力触探资料确定混凝土预制桩单桩竖向极限承载力标准值时,如无当地经验,可按下式计算:

                                

ⅤHUNNINGTUKONGXINZHUANG

5.3.8 当根据土的物理指标与承载力参数之间的经验关系确定敞口预应力混凝土空心桩单桩竖向极限承载力标准值时,可按下列公式计算:

        
▼ 展开条文说明

5.3.11 后注浆钢导管注浆后可等效替代纵向主筋。
▼ 展开条文说明

ⅧYEHUAXIAOYING

5.3.12 对于桩身周围有液化土层的低承台桩基,在承台底面上下分别有厚度不小于1.5m、1.0m的非液化土或非软弱土层时,可将液化土层极限侧阻力乘以土层液化影响折减系数计算单桩极限承载力标准值。土层液化影响折减系数ψl可按表5.3.12确定。

当承台底面上下非液化土层厚度小于以上规定时,土层液化影响折减系数ψl取0。


5.4 特殊条件下桩基竖向承载力验算


 


Ⅰ软弱下卧层验算

5.4.1 DUIYUZHUANGJUBUCHAOGUO6dDEQUNZHUANGJICHU,ZHUANGDUANCHILICENGXIACUNZAICHENGZAILIDIYUZHUANGDUANCHILICENGCHENGZAILI1/3DERUANRUOXIAWOCENGSHI,KEANXIALIEGONGSHIYANSUANRUANRUOXIAWOCENGDECHENGZAILI(JIANTU5.4.1):

    
▼ 展开条文说明

ⅡFUMOCALIJISUAN

5.4.2 符合下列条件之一的桩基,当桩周土层产生的沉降超过基桩的沉降时,在计算基桩承载力时应计入桩侧负摩阻力:

    1 ZHUANGCHUANYUEJIAOHOUSONGSANTIANTU、ZIZHONGSHIXIANXINGHUANGTU、QIANGUJIETU、YEHUATUCENGJINRUXIANGDUIJIAOYINGTUCENGSHI;

    2 ZHUANGZHOUCUNZAIRUANRUOTUCENG,LINJINZHUANGCEDIMIANCHENGSHOUJUBUJIAODADEZHANGQIHEZAI,HUODIMIANDAMIANJIDUIZAI(BAOKUOTIANTU)SHI;

    3 由于降低地下水位,使桩周土有效应力增大,并产生显著压缩沉降时。

5.4.3 桩周土沉降可能引起桩侧负摩阻力时,应根据工程具体情况考虑负摩阻力对桩基承载力和沉降的影响;当缺乏可参照的工程经验时,可按下列规定验算。

    1 DUIYUMOCAXINGJIZHUANGKEQUZHUANGSHENJISUANZHONGXINGDIANYISHANGCEZULIWEILING,BINGKEANXIASHIYANSUANJIZHUANGCHENGZAILI:


▼ 展开条文说明
                   

亚博体育彩票5.4.8 PENGZHANGTUSHANGQINGXINGJIANZHUDEDUANZHUANGJICHU,YINGANXIALIEGONGSHIYANSUANQUNZHUANGJICHUCHENGZHENGTIPOHUAIHEFEIZHENGTIPOHUAIDEKANGBAWENDINGXING:

5.5 桩基沉降计算

5.5.1 建筑桩基沉降变形计算值不应大于桩基沉降变形允许值。

5.5.2 桩基沉降变形可用下列指标表示:

    1 CHENJIANGLIANG;

    2 CHENJIANGCHA;

亚博体育彩票    3 ZHENGTIQINGXIE:JIANZHUWUZHUANGJICHUQINGXIEFANGXIANGLIANGDUANDIANDECHENJIANGCHAYUQIJULIZHIBIZHI;

亚博体育彩票    4 JUBUQINGXIE:QIANGXIATIAOXINGCHENGTAIYANZONGXIANGMOUYIZHANGDUFANWEINEIZHUANGJICHULIANGDIANDECHENJIANGCHAYUQIJULIZHIBIZHI。

5.5.3 计算桩基沉降变形时,桩基变形指标应按下列规定选用:

亚博体育彩票    1 YOUYUTUCENGHOUDUYUXINGZHIBUJUNYUN、HEZAICHAYI、TIXINGFUZA、XIANGHUYINGXIANGDENGYINSUYINQIDEDIJICHENJIANGBIANXING,DUIYUQITICHENGZHONGJIEGOUYINGYOUJUBUQINGXIEKONGZHI;

亚博体育彩票    2 DUIYUDUOCENGHUOGAOCENGJIANZHUHEGAOSONGJIEGOUYINGYOUZHENGTIQINGXIEZHIKONGZHI;

    3 DANGQIJIEGOUWEIKUANGJIA、KUANGJIA-JIANLIQIANG、KUANGJIA-HEXINTONGJIEGOUSHI,SHANGYINGKONGZHIZHU(QIANG)ZHIJIANDECHAYICHENJIANG。

5.5.5 对于本规范表5.5.4中未包括的建筑桩基沉降变形允许值,应根据上部结构对桩基沉降变形的适应能力和使用要求确定。

Ⅰ桩中心距不大于6倍桩径的桩基

5.5.6 对于桩中心距不大于6倍桩径的桩基,其最终沉降量计算可采用等效作用分层总和法。等效作用面位于桩端平面,等效作用面积为桩承台投影面积,等效作用附加压力近似取承台底平均附加压力。等效作用面以下的应力分布采用各向同性均质直线变形体理论。计算模式如图5.5.6所示,桩基任一点最终沉降量


▼ 展开条文说明
       
▼ 展开条文说明

5.5.12 计算桩基沉降时,应考虑相邻基础的影响,采用叠加原理计算;桩基等效沉降系数可按独立基础计算。

5.5.13 当桩基形状不规则时,可采用等效矩形面积计算桩基等效沉降系数,等效矩形的长宽比可根据承台实际尺寸和形状确定。

Ⅱ单桩、单排桩、疏桩基础

5.5.14 对于单桩、单排桩、桩中心距大于6倍桩径的疏桩基础的沉降计算应符合下列规定:

亚博体育彩票    1 CHENGTAIDIDIJITUBUFENDANHEZAIDEZHUANGJI。ZHUANGDUANPINGMIANYIXIADIJIZHONGYOUJIZHUANGYINQIDEFUJIAYINGLI,ANKAOLVZHUANGJINGYINGXIANGDEMINGDELIN(Mindlin)JIEFULUFJISUANQUEDING。JIANGCHENJIANGJISUANDIANSHUIPINGMIANYINGXIANGFANWEINEIGEJIZHUANGDUIYINGLIJISUANDIANCHANSHENGDEFUJIAYINGLIDIEJIA,CAIYONGDANXIANGYASUOFENCENGZONGHEFAJISUANTUCENGDECHENJIANG,BINGJIRUZHUANGSHENYASUOse。ZHUANGJIDEZUIZHONGCHENJIANGLIANGKEANXIALIEGONGSHIJISUAN:

 

 

 


▼ 展开条文说明


5.6 软土地基减沉复合疏桩基础



5.6.1 当软土地基上多层建筑,地基承载力基本满足要求(以底层平面面积计算)时,可设置穿过软土层进入相对较好土层的疏布摩擦型桩,由桩和桩间土共同分担荷载。该种减沉符合疏桩基础,可按下列公式确定承台面积和桩数:


▼ 展开条文说明

5.6.2 减沉复合疏桩基础中点沉降可按下列公式计算:

 


▼ 展开条文说明


5.7 桩基水平承载力与位移计算


Ⅰ单桩基础

5.7.1 受水平荷载的一般建筑物和水平荷载较小的高大建筑物单桩基础和群桩中基桩应满足下式要求:

5.7.2 单桩的水平承载力特征值的确定应符合下列规定:
▼ 展开条文说明

亚博体育彩票    1 DUIYUSHOUSHUIPINGHEZAIJIAODADESHEJIDENGJIWEIJIAJI、YIJIDEJIANZHUZHUANGJI,DANZHUANGSHUIPINGCHENGZAILITEZHENGZHIYINGTONGGUODANZHUANGSHUIPINGJINGZAISHIYANQUEDING,SHIYANFANGFAKEANXIANXINGXINGYEBIAOZHUN《JIANZHUJIZHUANGJIANCEJISHUGUIFAN》JGJ 106ZHIXING。

    2 DUIYUGANGJINHUNNINGTUYUZHIZHUANG、GANGZHUANG、ZHUANGSHENPEIJINLVBUXIAOYU0.65%DEGUANZHUZHUANG,KEGENJUJINGZAISHIYANJIEGUOQUDIMIANCHUSHUIPINGWEIYIWEI10mm(DUIYUSHUIPINGWEIYIMINGANDEJIANZHUWUQUSHUIPINGWEIYI6mm)SUODUIYINGDEHEZAIDE75%WEIDANZHUANGSHUIPINGCHENGZAILITEZHENGZHI。

亚博体育彩票    3 DUIYUZHUANGSHENPEIJINLVXIAOYU0.65%DEGUANZHUZHUANG,KEQUDANZHUANGSHUIPINGJINGZAISHIYANDELINJIEHEZAIDE75%WEIDANZHUANGSHUIPINGCHENGZAILITEZHENGZHI。

亚博体育彩票    4 DANGQUESHAODANZHUANGSHUIPINGJINGZAISHIYANZILIAOSHI,KEANXIALIEGONGSHIGUSUANZHUANGSHENPEIJINLVXIAOYU0.65%DEGUANZHUZHUDEDANZHUANGSHUIPINGCHENGZAILIDETEZHENGZHI:

 

 

 

 

亚博体育彩票5.7.4 JISUANSHUIPINGHEZAIJIAODAHESHUIPINGDIZHENZUOYONG、FENGZAIZUOYONGDEDAIDIXIASHIDEGAODAJIANZHUWUZHUANGJIDESHUIPINGWEIYISHI,KEKAOLVDIXIASHICEQIANG、CHENGTAI、ZHUANGQUN、TUGONGTONGZUOYONG,ANBENGUIFANFULUCFANGFAJISUANJIZHUANGNEILIHEBIANWEI,YUSHUIPINGWAILIZUOYONGPINGMIANXIANGCHUIZHIDEDANPAIZHUANGJICHUKEANBENGUIFANFULUCZHONGBIAOC.0.3-1JISUAN。

5.7.5 桩的水平变形系数和地基土水平抗力系数的比例系数m可按下列规定确定:

    1 ZHUANGDESHUIPINGBIANXINGXISHUa(1/m)

    2 地基土水平抗力系数的比例系数m,宜通过单桩水平静载试验确定,当无静载试验资料时,可按表5.7.5取值。


▼ 展开条文说明

5.8 桩身承载力与裂缝控制计算

5.8.1 桩身应进行承载力和裂缝控制计算。计算时应考虑桩身材料强度、成桩工艺、吊运与沉桩、约束条件、环境类别等因素,除按本节有关规定执行外,尚应符合现行国家标准《混凝土结构设计规范》GB 50010、《钢结构设计规范》GB 50017和《建筑抗震设计规范》GB 50011的有关规定。

Ⅰ受压桩

5.8.2 钢筋混凝土轴心受压桩正截面受压承载力应符合下列规定:

亚博体育彩票    1 DANGZHUANGDINGYIXIA5dFANWEIDEZHUANGSHENLUOXUANSHIGUJINJIANJUBUDAYU100mm,QIEFUHEBENGUIFANDI4.1.1TIAOGUIDINGSHI:


▼ 展开条文说明

5.8.4 计算轴心受压混凝土桩正截面受压承载力时,一般取稳定系数φ=1.0。对于高承台基桩、桩身穿越可液化土或不排水抗剪强度小于10kPa的软弱土层的基桩,应考虑压屈影响,可按本规范式(5.8.2-1)、式(5.8.2-2)计算所得桩身正截面受压承载力乘以φ折减。其稳定系数φ可根据桩身压屈计算长度lc和桩的设计直径d(或矩形桩短边尺寸6)确定。桩身压屈计算长度可根据桩顶的约束情况、桩身露出地面的自由长度l0、桩的入土长度h 、桩侧和桩底的土质条件按表5.8.4-1确定。桩的稳定系数φ可按表5.8.4-2确定。
▼ 展开条文说明

 

Ⅱ 抗拔桩

5.8.7 钢筋混凝土轴心抗拔桩的正截面受拉承载力应符合下式规定:


▼ 展开条文说明

5.8.9 当考虑地震作用验算桩身抗拔承载力时,应根据现行国家标准《建筑抗震设计规范》GB 50011的规定,对作用于桩顶的地震作用效应进行调整。

Ⅲ受水平作用桩

5.8.10 对于受水平荷载和地震作用的桩,其桩身受弯承载力和受剪承载力的验算应符合下列规定:

    1 DUIYUZHUANGDINGGUDUANDEZHUANG,YINGYANSUANZHUANGDINGZHENGJIEMIANWANJU;DUIYUZHUANGDINGZIYOUHUOJIAOJIEDEZHUANG,YINGYANSUANZHUANGSHENZUIDAWANJUJIEMIANCHUDEZHENGJIEMIANWANJU;

亚博体育彩票    2 YINGYANSUANZHUANGDINGXIEJIEMIANDESHOUJIANCHENGZAILI;

亚博体育彩票    3 ZHUANGSHENSUOCHENGSHOUZUIDAWANJUHESHUIPINGJIANLIDEJISUAN,KEANBENGUIFANFULUCJISUAN;

亚博体育彩票    4 ZHUANGSHENZHENGJIEMIANSHOUWANCHENGZAILIHEXIEJIEMIANSHOUJIANCHENGZAILI,YINGANXIANXINGGUOJIABIAOZHUN《HUNNINGTUJIEGOUSHEJIGUIFAN》GB 50010ZHIXING;

亚博体育彩票    5 DANGKAOLVDIZHENZUOYONGYANSUANZHUANGSHENZHENGJIEMIANSHOUWANHEXIEJIEMIANSHOUJIANCHENGZAILISHI,YINGGENJUXIANXINGGUOJIABIAOZHUN《JIANZHUKANGZHENSHEJIGUIFAN》GB 50011DEGUIDING,DUIZUOYONGYUZHUANGDINGDEDIZHENZUOYONGXIAOYINGJINXINGDIAOZHENG。 

Ⅳ预制桩吊运和锤击验算
▼ 展开条文说明

5.8.11 预制桩吊运时单吊点和双吊点的设置,应按吊点(或支点)跨间正弯矩与吊点处的负弯矩相等的原则进行布置。考虑预制桩吊运时可能受到冲击和振动的影响,计算吊运弯矩和吊运拉力时,可将桩身重力乘以1.5的动力系数。

5.8.12 对于裂缝控制等级为一级、二级的混凝土预制桩、预应力混凝土管桩,可按下列规定验算桩身的锤击压应力和锤击拉应力:

 

    3 ZUIDACHUIJIYAYINGLIHEZUIDACHUIJILAYINGLIFENBIEBUYINGCHAOGUOHUNNINGTUDEZHOUXINKANGYAQIANGDUSHEJIZHIHEZHOUXINKANGLAQIANGDUSHEJIZHI。


5.9 承台计算


Ⅰ受弯计算

5.9.1 桩基承台应进行正截面受弯承载力计算。承台弯距可按本规范第5.9.2~5.9.5条的规定计算,受弯承载力和配筋可按现行国家标准《混凝土结构设计规范》GB 50010的规定进行。
▼ 展开条文说明

5.9.2 柱下独立桩基承台的正截面弯矩设计值可按下列规定计算:

    1 LIANGZHUANGTIAOXINGCHENGTAIHEDUOZHUANGJUXINGCHENGTAIWANJUJISUANJIEMIANQUZAIZHUBIANHECHENGTAIBIANJIECHU[JIANTU5.9.2(a)],KEANXIALIEGONGSHIJISUAN:

 


▼ 展开条文说明

5.9.3 箱形承台和筏形承台的弯距可按下列规定计算:

    1 XIANGXINGCHENGTAIHEFAXINGCHENGTAIDEWANJUYIKAOLVDIJITUCENGXINGZHI、JIZHUANGFENBU、CHENGTAIHESHANGBUJIEGOULEIXINGHEGANGDU,ANDIJI—ZHUANG—CHENGTAI—SHANGBUJIEGOUGONGTONGZUOYONGYUANLIFENXIJISUAN;

    2 DUIYUXIANGXINGCHENGTAI,DANGZHUANGDUANCHILICENGWEIJIYAN、MISHIDESUISHILEITU、SHATUQIESHENHOUJUNYUNSHI;HUODANGSHANGBUJIEGOUWEIJIANLIQIANG;HUODANGSHANGBUJIEGOUWEIKUANGJIA-HEXINTONGJIEGOUQIEANBIANGANGDUDIAOPINGYUANZEBUZHUANGSHI,XIANGXINGCHENGTAIDIBANKEJINANJUBUWANJUZUOYONGJINXINGJISUAN;

    3 对于筏形承台,当桩端持力层深厚坚硬、上部结构刚度较好,且柱荷载及柱间距的变化不超过20%时;或当上部结构为框架-核心筒结构且按变刚度调平原则布桩时,可仅按局部弯矩作用进行计算。
▼ 展开条文说明

5.9.4 柱下条形承台梁的弯矩可按下列规定计算:

    1 KEANDANXINGDIJILIANG(DIJIJISUANMOXINGYINGGENJUDIJITUCENGTEXINGXUANQU)JINXINGFENXIJISUAN;

    2 当桩端持力层深厚坚硬且桩柱轴线不重合时,可视桩为不动铰支座,按连续梁计算。
▼ 展开条文说明

5.9.5 砌体墙下条形承台梁,可按倒置弹性地基梁计算弯矩和剪力,并应符合本规范附录G的要求。对于承台上的砌体墙,尚应验算桩顶部位砌体的局部承压强度。
▼ 展开条文说明

Ⅱ受冲切计算

5.9.6 桩基承台厚度应满足柱(墙)对承台的冲切和基桩对承台的冲切承载力要求。

5.9.7 轴心竖向力作用下桩基承台受柱(墙)的冲切,可按下列规定计算:

    1 CHONGQIEPOHUAIZHUITIYINGCAIYONGZIZHU(QIANG)BIANHUOCHENGTAIBIANJIECHUZHIXIANGYINGZHUANGDINGBIANYUANLIANXIANSUOGOUCHENGDEZHUITI,ZHUITIXIEMIANYUCHENGTAIDIMIANZHIJIAJIAOBUYINGXIAOYU45°(JIANTU5.9.7)。

亚博体育彩票    2 SHOUZHU(QIANG)CHONGQIECHENGZAILIKEANXIALIEGONGSHIJISUAN:

 

 


▼ 展开条文说明

Ⅲ受剪计算

5.9.9 柱(墙)下桩基承台,应分别对柱(墙)边、变阶处和桩边联线形成的贯通承台的斜截面的受剪承载力进行验算。当承台悬挑边有多排基桩形成多个斜截面时,应对每个斜截面的受剪承载力进行验算。
▼ 展开条文说明

5.9.10 柱下独立桩基承台斜截面受剪承载力应按下列规定计算:

    1 CHENGTAIXIEJIEMIANSHOUJIANCHENGZAILIKEANXIALIEGONGSHIJISUAN(JIANTU5.9.10-1):

             
▼ 展开条文说明

Ⅳ局部受压计算

5.9.15 对于柱下桩基,当承台混凝土强度等级低于柱或桩的混凝土强度等级时,应验算柱下或桩上承台的局部受压承载力。
▼ 展开条文说明

Ⅴ抗震验算

5.9.16 当进行承台的抗震验算时,应根据现行国家标准《建筑抗震设计规范》GB 50011的规定对承台顶面的地震作用效应和承台的受弯、受冲切、受剪承载力进行抗震调整。
▼ 展开条文说明


6灌注桩施工

6.1 施工准备

6.1.1 GUANZHUZHUANGSHIGONGYINGJUBEIXIALIEZILIAO:

    1 JIANZHUCHANGDIYANTUGONGCHENGKANCHABAOGAO;

    2 ZHUANGJIGONGCHENGSHIGONGTUJITUZHIHUISHENJIYAO;

    3 JIANZHUCHANGDIHELINJINQUYUNEIDEDIXIAGUANXIAN、DIXIAGOUZHUWU、WEIFANG、JINGMIYIQICHEJIANDENGDEDIAOCHAZILIAO;

    4 ZHUYAOSHIGONGJIXIEJIQIPEITAOSHEBEIDEJISHUXINGNENGZILIAO;

亚博体育彩票    5 ZHUANGJIGONGCHENGDESHIGONGZUZHISHEJI;

    6 SHUINI、SHA、SHI、GANGJINDENGYUANCAILIAOJIQIZHIPINDEZHIJIANBAOGAO;

    7 有关荷载、施工工艺的试验参考资料。

6.1.2 钻孔机具及工艺的选择,应根据桩型、钻孔深度、土层情况、泥浆排放及处理条件综合确定。

6.1.3 施工组织设计应结合工程特点,有针对性地制定相应质量管理措施,主要应包括下列内容:

亚博体育彩票    1 SHIGONGPINGMIANTU:BIAOMINGZHUANGWEI、BIANHAO、SHIGONGSHUNXU、SHUIDIANXIANLUHELINSHISHESHIDEWEIZHI;CAIYONGNIJIANGHUBICHENGKONGSHI,YINGBIAOMINGNIJIANGZHIBEISHESHIJIQIXUNHUANXITONG;

亚博体育彩票    2 QUEDINGCHENGKONGJIXIE、PEITAOSHEBEIYIJIHELISHIGONGGONGYIDEYOUGUANZILIAO,NIJIANGHUBIGUANZHUZHUANGBIXUYOUNIJIANGCHULICUOSHI;

    3 SHIGONGZUOYEJIHUAHELAODONGLIZUZHIJIHUA;

亚博体育彩票    4 JIXIESHEBEI、BEIJIAN、GONGJU、CAILIAOGONGYINGJIHUA;

    5 ZHUANGJISHIGONGSHI,DUIANQUAN,LAODONGBAOHU、FANGHUO、FANGYU、FANGTAIFENG、BAOPOZUOYE、WENWUHEHUANJINGBAOHUDENGFANGMIANYINGANYOUGUANGUIDINGZHIXING;

    6 保证工程质量、安全生产和季节性施工的技术措施。

6.1.4 成桩机械必须经鉴定合格,不得使用不合格机械。

6.1.5 施工前应组织图纸会审,会审纪要连同施工图等应作为施工依据,并应列入工程档案。

6.1.6 桩基施工用的供水、供电、道路、排水、临时房屋等临时设施,必须在开工前准备就绪,施工场地应进行平整处理,保证施工机械正常作业。

6.1.7 基桩轴线的控制点和水准点应设在不受施工影响的地方。开工前,经复核后应妥善保护,施工中应经常复测。

6.1.8 用于施工质量检验的仪表、器具的性能指标,应符合现行国家相关标准的规定。


6.2 一般规定

6.2.1 BUTONGZHUANGXINGDESHIYONGTIAOJIANYINGFUHEXIALIEGUIDING:

亚博体育彩票    1 NIJIANGHUBIZUANKONGGUANZHUZHUANGYIYONGYUDIXIASHUIWEIYIXIADENIANXINGTU、FENTU、SHATU、TIANTU、SUISHITUJIFENGHUAYANCENG;

    2 XUANWACHENGKONGGUANZHUZHUANGYIYONGYUNIANXINGTU、FENTU、SHATU、TIANTU、SUISHITUJIFENGHUAYANCENG;

亚博体育彩票    3 CHONGKONGGUANZHUZHUANGCHUYIYONGYUSHANGSHUDIZHIQINGKUANGWAI,HAINENGCHUANTOUJIUJICHU、JIANZHULAJITIANTUHUODAGUSHIDENGZHANGAIWU。ZAIYANRONGFAYUDIQUYINGSHENZHONGSHIYONG,CAIYONGSHI,YINGSHIDANGJIAMIKANCHAZUANKONG;

    4 ZHANGLUOXUANZUANKONGYAGUANZHUANGHOUCHAGANGJINLONGYIYONGYUNIANXINGTU、FENTU、SHATU、TIANTU、FEIMISHIDESUISHILEITU、QIANGFENGHUAYAN;

    5 GANZUOYEZUAN、WAKONGGUANZHUZHUANGYIYONGYUDIXIASHUIWEIYISHANGDENIANXINGTU、FENTU、TIANTU、ZHONGDENGMISHIYISHANGDESHATU、FENGHUAYANCENG;

    6 ZAIDIXIASHUIWEIJIAOGAO,YOUCHENGYASHUIDESHATUCENG、ZHISHUICENG、HOUDUJIAODADELIUSUZHUANGYUNI、YUNIZHITUCENGZHONGBUDEXUANYONGRENGONGWAKONGGUANZHUZHUANG;

    7 沉管灌注桩宜用于黏性土、粉土和砂土;夯扩桩宜用于桩端持力层为埋深不超过20m的中、低压缩性黏性土、粉土、砂土和碎石类土。
▼ 展开条文说明

6.2.2 成孔设备就位后,必须平整、稳固,确保在成孔过程中不发生倾斜和偏移。应在成孔钻具上设置控制深度的标尺,并应在施工中进行观测记录。

6.2.3 成孔的控制深度应符合下列要求:

    1 MOCAXINGZHUANG:MOCAZHUANGYINGYISHEJIZHUANGZHANGKONGZHICHENGKONGSHENDU;DUANCHENGMOCAZHUANGBIXUBAOZHENGSHEJIZHUANGZHANGJIZHUANGDUANJINRUCHILICENGSHENDU。DANGCAIYONGCHUIJICHENGUANFACHENGKONGSHI,ZHUANGGUANRUTUSHENDUKONGZHIYINGYIBIAOGAOWEIZHU,YIGUANRUDUKONGZHIWEIFU。

    2 端承型桩:当采用钻(冲)、挖掘成孔时,必须保证桩端进入持力层的设计深度;当采用锤击沉管法成孔时,桩管入土深度控制以贯入度为主,以控制标高为辅。
▼ 展开条文说明

6.2.4 灌注桩成孔施工的允许偏差应满足表6.2.4的要求。

6.2.5 钢筋笼制作、安装的质量应符合下列要求:

    1 钢筋笼的材质、尺寸应符合设计要求,制作允许偏差应符合表6.2.5的规定:    
    

    2 FENDUANZHIZUODEGANGJINLONG,QIJIETOUYICAIYONGHANJIEHUOJIXIESHIJIETOU(GANGJINZHIJINGDAYU20mm),BINGYINGZUNSHOUGUOJIAXIANXINGBIAOZHUN《GANGJINJIXIELIANJIETONGYONGJISHUGUICHENG》JGJ 107、《GANGJINHANJIEJIYANSHOUGUICHENG》JGJ 18HE《HUNNINGTUJIEGOUGONGCHENGSHIGONGZHILIANGYANSHOUGUIFAN》GB 50204DEGUIDING;

亚博体育彩票    3 JIAJINGGUYISHEZAIZHUJINWAICE,DANGYINSHIGONGGONGYIYOUTESHUYAOQIUSHIYEKEZHIYUNEICE;

亚博体育彩票    4 DAOGUANJIETOUCHUWAIJINGYINGBIGANGJINLONGDENEIJINGXIAO100mmYISHANG;

    5 BANYUNHEDIAOZHUANGGANGJINLONGSHI,YINGFANGZHIBIANXING,ANFANGYINGDUIZHUNKONGWEI,BIMIANPENGZHUANGKONGBIHEZIYOULUOXIA,JIUWEIHOUYINGLIJIGUDING。

6.2.6 粗骨料可选用卵石或碎石,其粒径不得大于钢筋间最小净距的1/3。

6.2.7 检查成孔质量合格后应尽快灌注混凝土。直径大于1m或单桩混凝土量超过25m3的桩,每根桩桩身混凝土应留有1组试件;直径不大于1m的桩或单桩混凝土量不超过25m3的桩,每个灌注台班不得少于1组;每组试件应留3件。

6.2.8 在正式施工前,宜进行试成孔。

6.2.9 灌注桩施工现场所有设备、设施、安全装置、工具配件以及个人劳保用品必须经常检查,确保完好和使用安全。


6.3 泥浆护壁成孔灌注桩

ⅠNIJIANGDEZHIBEIHECHULI


   6.3.1 除能自行造浆的黏性土层外,均应制备泥浆。泥浆制备应选用高塑性黏土或膨润土。泥浆应根据施工机械、工艺及穿越土层情况进行配合比设计。

6.3.2 泥浆护壁应符合下列规定:

亚博体育彩票    1 SHIGONGQIJIANHUTONGNEIDENIJIANGMIANYINGGAOCHUDIXIASHUIWEI1.0mYISHANG,ZAISHOUSHUIWEIZHANGLUOYINGXIANGSHI,NIJIANGMIANYINGGAOCHUZUIGAOSHUIWEI1.5mYISHANG;

亚博体育彩票    2 ZAIQINGKONGGUOCHENGZHONG,YINGBUDUANZHIHUANNIJIANG,ZHIZHIGUANZHUSHUIXIAHUNNINGTU;

亚博体育彩票    3 GUANZHUHUNNINGTUQIAN,KONGDI500mmYINEIDENIJIANGXIANGDUIMIDUYINGXIAOYU1.25;HANSHALVBUDEDAYU8%;NIANDUBUDEDAYU28s;

    4 在容易产生泥浆渗漏的土层中应采取维持孔壁稳定的措施。
▼ 展开条文说明

6.3.3 废弃的浆、渣应进行处理,不得污染环境。


   Ⅱ正、反循环钻孔灌注桩的施工


   6.3.4 对孔深较大的端承型桩和粗粒土层中的摩擦型桩,宜采用反循环工艺成孔或清孔,也可根据土层情况采用正循环钻进,反循环清孔。

6.3.5 泥浆护壁成孔时,宜采用孔口护筒,护筒设置应符合下列规定:

    1 HUTONGMAISHEYINGZHUNQUE、WENDING,HUTONGZHONGXINYUZHUANGWEIZHONGXINDEPIANCHABUDEDAYU50mm;

亚博体育彩票    2 HUTONGKEYONG4~8mmHOUGANGBANZHIZUO,QINEIJINGYINGDAYUZUANTOUZHIJING100mm,SHANGBUYIKAISHE1~2GEYIJIANGKONG;

亚博体育彩票    3 HUTONGDEMAISHESHENDU:ZAINIANXINGTUZHONGBUYIXIAOYU1.0m;SHATUZHONGBUYIXIAOYU1.5m。HUTONGXIADUANWAICEYINGCAIYONGNIANTUTIANSHI;QIGAODUSHANGYINGMANZUKONGNEINIJIANGMIANGAODUDEYAOQIU;

    4 SHOUSHUIWEIZHANGLUOYINGXIANGHUOSHUIXIASHIGONGDEZUANKONGGUANZHUZHUANG,HUTONGYINGJIAGAOJIASHEN,BIYAOSHIYINGDARUBUTOUSHUICENG。

6.3.6 当在软土层中钻进时,应根据泥浆补给情况控制钻进速度;在硬层或岩层中的钻进速度应以钻机不发生跳动为准。

6.3.7 钻机设置的导向装置应符合下列规定:

    1 QIANSHUIZUANDEZUANTOUSHANGYINGYOUBUXIAOYU3dZHANGDUDEDAOXIANGZHUANGZHI;

亚博体育彩票    2 LIYONGZUANGANJIAYADEZHENGXUNHUANHUIZHUANZUANJI,ZAIZUANJUZHONGYINGJIASHEFUZHENGQI。

6.3.8 如在钻进过程中发生斜孔、塌孔和护筒周围冒浆、失稳等现象时,应停钻,待采取相应措施后再进行钻进。

6.3.9 钻孔达到设计深度,灌注混凝土之前,孔底沉渣厚度指标应符合下列规定:

    1 DUIDUANCHENGXINGZHUANG,BUYINGDAYU50mm;

    2 DUIMOCAXINGZHUANG,BUYINGDAYU100mm;

    3 对抗拔、抗水平力桩,不应大于200mm。
▼ 展开条文说明

亚博体育彩票ⅢCHONGJICHENGKONGGUANZHUZHUANGDESHIGONG


6.3.10 在钻头锥顶和提升钢丝绳之间应设置保证钻头自动转向的装置。

6.3.11 冲孔桩孔口护筒,其内径应大于钻头直径200mm,护筒应按本规范第6.3.5条设置。

6.3.12 泥浆的制备、使用和处理应符合本规范第6.3.1~6.3.3条的规定。

6.3.13 冲击成孔质量控制应符合下列规定:

    1 KAIKONGSHI,YINGDICHUIMIJI,DANGBIAOTUWEIYUNI、XISHADENGRUANRUOTUCENGSHI,KEJIANIANTUKUAIJIAXIAOPIANSHIFANFUCHONGJIZAOBI,KONGNEINIJIANGMIANYINGBAOCHIWENDING;

亚博体育彩票    2 ZAIGEZHONGBUTONGDETUCENG、YANCENGZHONGCHENGKONGSHI,KEANZHAOBIAO6.3.13DECAOZUOYAODIANJINXING;

亚博体育彩票    3 JINRUJIYANHOU,YINGCAIYONGDACHONGCHENG、DIPINLVCHONGJI,DANGFAXIANCHENGKONGPIANYISHI,YINGHUITIANPIANSHIZHIPIANKONGSHANGFANG300~500mmCHU,RANHOUZHONGXINCHONGKONG;

    4 DANGYUDAOGUSHISHI,KEYUBAOHUOCAIYONGGAODICHONGCHENGJIAOTICHONGJI,JIANGDAGUSHIJISUIHUOJIRUKONGBI;

    5 YINGCAIQUYOUXIAODEJISHUCUOSHIFANGZHIRAODONGKONGBI、TAKONG、KUOKONG、KAZUANHEDIAOZUANJINIJIANGLIUSHIDENGSHIGU;

    6 MEIZUANJIN4~5mYINGYANKONGYICI,ZAIGENGHUANZUANTOUQIANHUORONGYISUOKONGCHU,JUNYINGYANKONG;

亚博体育彩票    7 JINRUJIYANHOU,FEIZHUANGDUANCHILICENGMEIZUANJIN300~500mmHEZHUANGDUANCHILICENGMEIZUANJIN100~300mSHI,YINGQINGKONGQUYANGYICI,BINGYINGZUOJILU。

6.3.14 排渣可采用泥浆循环或抽渣筒等方法,当采用抽渣筒排渣时,应及时补给泥浆。

6.3.15 冲孔中遇到斜孔、弯孔、梅花孔、塌孔及护筒周围冒浆、失稳等情况时,应停止施工,采取措施后方可继续施工。

6.3.16 大直径桩孔可分级成孔,第一级成孔直径应为设计桩径的0.6~0.8倍。

6.3.17 清孔宜按下列规定进行:

    1 BUYITAKONGDEZHUANGKONG,KECAIYONGKONGQIXINIQINGKONG;

    2 WENDINGXINGCHADEKONGBIYINGCAIYONGNIJIANGXUNHUANHUOCHOUZHATONGPAIZHA,QINGKONGHOUGUANZHUHUNNINGTUZHIQIANDENIJIANGZHIBIAOYINGANBENGUIFANDI6.3.1TIAOZHIXING;

亚博体育彩票    3 QINGKONGSHI,KONGNEINIJIANGMIANYINGFUHEBENGUIFANDI6.3.2TIAODEGUIDING;

亚博体育彩票    4 GUANZHUHUNNINGTUQIAN,KONGDICHENZHAYUNXUHOUDUYINGFUHEBENGUIFANDI6.3.9TIAODEGUIDING。


   Ⅳ旋挖成孔灌注桩的施工


亚博体育彩票   6.3.18 旋挖钻成孔灌注桩应根据不同的地层情况及地下水位埋深,采用干作业成孔和泥浆护壁成孔工艺,干作业成孔工艺可按本规范第6.6节执行。

6.3.19 泥浆护壁旋挖钻机成孔应配备成孔和清孔用泥浆及泥浆池(箱),在容易产生泥浆渗漏的土层中可采取提高泥浆相对密度,掺入锯末、增黏剂提高泥浆黏度等维持孔壁稳定的措施。

6.3.20 泥浆制备的能力应大于钻孔时的泥浆需求量,每台套钻机的泥浆储备量不应少于单桩体积。

6.3.21 旋挖钻机施工时,应保证机械稳定、安全作业,必要时可在场地辅设能保证其安全行走和操作的钢板或垫层(路基板)。

6.3.22 每根桩均应安设钢护筒,护筒应满足本规范第6.3.5条的规定。

6.3.23 成孔前和每次提出钻斗时,应检查钻斗和钻杆连接销子、钻斗门连接销子以及钢丝绳的状况,并应清除钻斗上的渣土。 

6.3.24 旋挖钻机成孔应采用跳挖方式,钻斗倒出的土距桩孔口的最小距离应大于6m,并应及时清除。应根据钻进速度同步补充泥浆,保持所需的泥浆面高度不变。
▼ 展开条文说明

6.3.25 钻孔达到设计深度时,应采用清孔钻头进行清孔,并应满足本规范第6.3.2条和第6.3.3条要求。孔底沉渣厚度控制指标应符合本规范第6.3.9条规定。
▼ 展开条文说明

ⅤSHUIXIAHUNNINGTUDEGUANZHU


   6.3.26 钢筋笼吊装完毕后,应安置导管或气泵管二次清孔,并应进行孔位、孔径、垂直度、孔深,沉渣厚度等检验,合格后应立即灌注混凝土。

6.3.27 水下灌注的混凝土应符合下列规定:

亚博体育彩票    1 SHUIXIAGUANZHUHUNNINGTUBIXUJUBEILIANGHAODEHEYIXING,PEIHEBIYINGTONGGUOSHIYANQUEDING;TANLUODUYIWEI180~220mm;SHUINIYONGLIANGBUYINGSHAOYU360kg/m3(DANGCHANRUFENMEIHUISHISHUINIYONGLIANGKEBUSHOUCIXIAN);

    2 SHUIXIAGUANZHUHUNNINGTUDEHANSHALVYIWEI40%~50%,BINGYIXUANYONGZHONGCUSHA;CUGULIAODEZUIDALIJINGYINGXIAOYU40mm;BINGYINGMANZUBENGUIFANDI6.2.6TIAODEYAOQIU;

    3 水下灌注混凝土宜掺外加剂。
▼ 展开条文说明

6.3.28 导管的构造和使用应符合下列规定:

亚博体育彩票    1 DAOGUANBIHOUBUYIXIAOYU3mm,ZHIJINGYIWEI200~250mm,ZHIJINGZHIZUOPIANCHABUYINGCHAOGUO2mm,DAOGUANDEFENJIEZHANGDUKESHIGONGYIYAOQIUQUEDING,DIGUANZHANGDUBUYIXIAOYU4m,JIETOUYICAIYONGSHUANGLUOWENFANGKOUKUAISUJIETOU;

亚博体育彩票    2 DAOGUANSHIYONGQIANYINGSHIPINZHUANG、SHIYA,SHISHUIYALIKEQUWEI0.6~1.0MPa;

亚博体育彩票    3 MEICIGUANZHUHOUYINGDUIDAOGUANNEIWAIJINXINGQINGXI。

6.3.29 使用的隔水栓应有良好的隔水性能,并应保证顺利排出;隔水栓宜采用球胆或与桩身混凝土强度等级相同的细石混凝土制作。

6.3.30 灌注水下混凝土的质量控制应满足下列要求:

亚博体育彩票    1 KAISHIGUANZHUHUNNINGTUSHI,DAOGUANDIBUZHIKONGDIDEJULIYIWEI300~500mm;

亚博体育彩票    2 YINGYOUZUGOUDEHUNNINGTUCHUBEILIANG,DAOGUANYICIMAIRUHUNNINGTUGUANZHUMIANYIXIABUYINGSHAOYU0.8m;

亚博体育彩票    3 DAOGUANMAIRUHUNNINGTUSHENDUYIWEI2~6m。YANJINJIANGDAOGUANTICHUHUNNINGTUGUANZHUMIAN,BINGYINGKONGZHITIBADAOGUANSUDU,YINGYOUZHUANRENCELIANGDAOGUANMAISHENJIGUANNEIWAIHUNNINGTUGUANZHUMIANDEGAOCHA,TIANXIESHUIXIAHUNNINGTUGUANZHUJILU;

    4 GUANZHUSHUIXIAHUNNINGTUBIXULIANXUSHIGONG,MEIGENZHUANGDEGUANZHUSHIJIANYINGANCHUPANHUNNINGTUDECHUNINGSHIJIANKONGZHI,DUIGUANZHUGUOCHENGZHONGDEGUZHANGYINGJILUBEIAN;

    5 应控制最后一次灌注量,超灌高度宜为0.8~1.0m,凿除泛浆后必须保证暴露的桩顶混凝土强度达到设计等级。
▼ 展开条文说明


6.4 长螺旋钻孔压灌桩

6.4.1 DANGXUYAOCHUANYUELAONIANTU、HOUCENGSHATU、SUISHITUYIJISUXINGZHISHUDAYU25DENIANTUSHI,YINGJINXINGSHIZUAN。

6.4.2 钻机定位后,应进行复检,钻头与桩位点偏差不得大于20mm,开孔时下钻速度应缓慢;钻进过程中,不宜反转或提升钻杆。

6.4.3 钻进过程中,当遇到卡钻、钻机摇晃、偏斜或发生异常声响时,应立即停钻,查明原因,采取相应措施后方可继续作业。

6.4.4 根据桩身混凝土的设计强度等级,应通过试验确定混凝土配合比;混凝土坍落度宜为180~220mm粗骨料可采用卵石或碎石,最大粒径不宜大于30mm;可掺加粉煤灰或外加剂。

6.4.5 混凝土泵型号应根据桩径选择,混凝土输送泵管布置宜减少弯道,混凝土泵与钻机的距离不宜超过60m。

6.4.6 桩身混凝土的泵送压灌应连续进行,当钻机移位时,混凝土泵料斗内的混凝土应连续搅拌,泵送混凝土时,料斗内混凝土的高度不得低于400mm。

6.4.7 混凝土输送泵管宜保持水平,当长距离泵送时,泵管下面应垫实。

6.4.8 当气温高于30℃时,宜在输送泵管上覆盖隔热材料,每隔一段时间应洒水降温。

6.4.9 钻至设计标高后,应先泵入混凝土并停顿10~20s,再缓慢提升钻杆。提钻速度应根据土层情况确定,且应与混凝土泵送量相匹配,保证管内有一定高度的混凝土。

6.4.10 在地下水位以下的砂土层中钻进时,钻杆底部活门应有防止进水的措施,压灌混凝土应连续进行。

6.4.11 压灌桩的充盈系数宜为1.0~1.2。桩顶混凝土超灌高度不宜小于0.3~0.5m。

6.4.12 成桩后,应及时清除钻杆及泵管内残留混凝土。长时间停置时,应采用清水将钻杆、泵管、混凝土泵清洗干净。

6.4.13 混凝土压灌结束后,应立即将钢筋笼插至设计深度。钢筋笼插设宜采用专用插筋器。
▼ 展开条文说明


6.5 沉管灌注桩和内夯沉管灌注桩


▼ 展开条文说明


   Ⅰ锤击沉管灌注桩施工


   6.5.1 锤击沉管灌注桩施工应根据土质情况和荷载要求,分别选用单打法、复打法或反插法。

6.5.2 锤击沉管灌注桩施工应符合下列规定;

    1 QUNZHUANGJICHUDEJIZHUANGSHIGONG,YINGGENJUTUZHI、BUZHUANGQINGKUANG,CAIQUXIAOJIANFUMIANJITUXIAOYINGDEJISHUCUOSHI,QUEBAOCHENGZHUANGZHILIANG;

    2 ZHUANGGUAN、HUNNINGTUYUZHIZHUANGJIANHUOGANGZHUANGJIANDEJIAGONGZHILIANGHEMAISHEWEIZHIYINGYUSHEJIXIANGFU,ZHUANGGUANYUZHUANGJIANDEJIECHUYINGYOULIANGHAODEMIFENGXING。

6.5.3 灌注混凝土和拔管的操作控制应符合下列规定:

    1 CHENGUANZHISHEJIBIAOGAOHOU,YINGLIJIJIANCHAHECHULIZHUANGGUANNEIDEJINNI、JINSHUIHETUNZHUANGJIANDENGQINGKUANG,BINGLIJIGUANZHUHUNNINGTU;

亚博体育彩票    2 DANGZHUANGSHENPEIZHIJUBUZHANGDUGANGJINLONGSHI,DIYICIGUANZHUHUNNINGTUYINGXIANGUANZHILONGDIBIAOGAO,RANHOUFANGZHIGANGJINLONG,ZAIGUANZHIZHUANGDINGBIAOGAO。DIYICIBAGUANGAODUYINGYINENGRONGNADIERCIGUANRUDEHUNNINGTULIANGWEIXIAN。ZAIBAGUANGUOCHENGZHONGYINGCAIYONGCECHUIHUOFUBIAOJIANCEHUNNINGTUMIANDEXIAJIANGQINGKUANG;

    3 BAGUANSUDUYINGBAOCHIJUNYUN,DUIYIBANTUCENGBAGUANSUDUYIWEI1m/min,ZAIRUANRUOTUCENGHERUANYINGTUCENGJIAOJIECHUBAGUANSUDUYIKONGZHIZAI0.3~0.8m/min;

    4 CAIYONGDAODABAGUANDEDAJICISHU,DANDONGQICHUIBUDESHAOYU50CI/min,ZIYOULUOCHUIXIAOLUOJUQINGJIBUDESHAOYU40CI/min;ZAIGUANDIWEIBAZHIZHUANGDINGSHEJIBIAOGAOZHIQIAN,DAODAHEQINGJIBUDEZHONGDUAN。

6.5.4 混凝土的充盈系数不得小于1.0;对于充盈系数小于1.0的桩,应全长复打,对可能断桩和缩颈桩,应进行局部复打。成桩后的桩身混凝土顶面应高于桩顶设计标高500mm以内。全长复打时,桩管入土深度宜接近原桩长,局部复打应超过断桩或缩颈区1m以上。

6.5.5 全长复打桩施工时应符合下列规定:

亚博体育彩票    1 DIYICIGUANZHUHUNNINGTUYINGDADAOZIRANDIMIAN;

亚博体育彩票    2 BAGUANGUOCHENGZHONGYINGJISHIQINGCHUZHANZAIGUANBISHANGHESANLUOZAIDIMIANSHANGDEHUNNINGTU;

    3 CHUDAYUFUDADEZHUANGZHOUXIANYINGZHONGHE;

亚博体育彩票    4 FUDASHIGONGBIXUZAIDIYICIGUANZHUDEHUNNINGTUCHUNINGZHIQIANWANCHENG。

6.5.6 混凝土的坍落度宜为80~100mm。


   Ⅱ振动、振动冲击沉管灌注桩施工


亚博体育彩票   6.5.7 振动、振动冲击沉管灌注桩应根据土质情况和荷载要求,分别选用单打法、复打法、反插法等。单打法可用于含水量较小的土层,且宜采用预制桩尖;反插法及复打法可用于饱和土层。

6.5.8 振动、振动冲击沉管灌注桩单打法施工的质量控制应符合下列规定:

    1 BIXUYANGEKONGZHIZUIHOU30sDEDIANLIU、DIANYAZHI,QIZHIANSHEJIYAOQIUHUOGENJUSHIZHUANGHEDANGDIJINGYANQUEDING;

    2 ZHUANGGUANNEIGUANMANHUNNINGTUHOU,YINGXIANZHENDONG5~10s,ZAIKAISHIBAGUAN,YINGBIANZHENBIANBA,HAIBACHU0.5~1.0m,TINGBA,ZHENDONG5~10s;RUCIFANFU,ZHIZHIZHUANGGUANQUANBUBACHU;

    3 ZAIYIBANTUCENGNEI,BAGUANSUDUYIWEI1.2~1.5m/min,YONGHUOBANZHUANGJIANSHIYIMAN,YONGYUZHIZHUANGJIANSHIKESHIDANGJIAKUAI;ZAIRUANRUOTUCENGZHONGYIKONGZHIZAI0.6~0.8m/min。

6.5.9 振动、振动冲击沉管灌注桩反插法施工的质量控制应符合下列规定;

    1 ZHUANGGUANGUANMANHUNNINGTUHOU,XIANZHENDONGZAIBAGUAN,MEICIBAGUANGAODU0.5~1.0m,FANCHASHENDU0.3~0.5m;ZAIBAGUANGUOCHENGZHONG,YINGFENDUANTIANJIAHUNNINGTU,BAOCHIGUANNEIHUNNINGTUMIANSHIZHONGBUDIYUDIBIAOMIANHUOGAOYUDIXIASHUIWEI1.0~1.5mYISHANG,BAGUANSUDUYINGXIAOYU0.5m/min;

    2 ZAIJUZHUANGJIANCHU1.5mFANWEINEI,YIDUOCIFANCHAYIKUODAZHUANGDUANBUDUANMIAN;

    3 CHUANGUOYUNIJIACENGSHI,YINGJIANMANBAGUANSUDU,BINGJIANSHAOBAGUANGAODUHEFANCHASHENDU,ZAILIUDONGXINGYUNIZHONGBUYISHIYONGFANCHAFA。

6.5.10 振动、振动冲击沉管灌注桩复打法的施工要求可按本规范第6.5.4条和第6.5.5条执行。 


   Ⅲ内夯沉管灌注桩施工


   6.5.11 当采用外管与内夯管结合锤击沉管进行夯压、扩底、扩径时,内夯管应比外管短100mm,内夯管底端可采用闭口平底或闭口锥底(见图6.5.11)。

 

6.5.14 桩身混凝土宜分段灌注;拔管时内夯管和桩锤应施压于外管中的混凝土顶面,边压边拔。

6.5.15 施工前宜进行试成桩,并应详细记录混凝土的分次灌注量、外管上拔高度、内管夯击次数、双管同步沉入深度,并应检查外管的封底情况,有无进水、涌泥等,经核定后可作为施工控制依据。


6.6 干作业成孔灌注桩


▼ 展开条文说明


亚博体育彩票Ⅰ钻孔(扩底)灌注桩施工


亚博体育彩票   6.6.1 钻孔时应符合下列规定:

    1 ZUANGANYINGBAOCHICHUIZHIWENGU,WEIZHIZHUNQUE,FANGZHIYINZUANGANHUANGDONGYINQIKUODAKONGJING;

亚博体育彩票    2 ZUANJINSUDUYINGGENJUDIANLIUZHIBIANHUA,JISHIDIAOZHENG;

亚博体育彩票    3 ZUANJINGUOCHENGZHONG,YINGSUISHIQINGLIKONGKOUJITU,YUDAODIXIASHUI、TAKONG、SUOKONGDENGYICHANGQINGKUANGSHI,YINGJISHICHULI。

亚博体育彩票6.6.2 ZUANKONGKUODIZHUANGSHIGONG,ZHIKONGBUFENYINGANBENGUIFANDI6.6.1、6.6.3、6.6.4TIAOGUIDINGZHIXING,KUODIBUWEISHANGYINGFUHEXIALIEGUIDING:

亚博体育彩票    1 YINGGENJUDIANLIUZHIHUOYOUYAZHI,DIAOJIEKUOKONGDAOPIANXUETULIANG,FANGZHICHUXIANCHAOFUHEXIANXIANG;

    2 KUODIZHIJINGHEKONGDIDEXUTUHOUDUYINGFUHESHEJIYAOQIU。

亚博体育彩票6.6.3 CHENGKONGDADAOSHEJISHENDUHOU,KONGKOUYINGYUBAOHU,YINGANBENGUIFANDI6.2.4TIAOGUIDINGYANSHOU,BINGYINGZUOHAOJILU。

6.6.4 GUANZHUHUNNINGTUQIAN,YINGZAIKONGKOUANFANGHUKONGLOUDOU,RANHOUFANGZHIGANGJINLONG,BINGYINGZAICICELIANGKONGNEIXUTUHOUDU。KUODIZHUANGGUANZHUHUNNINGTUSHI,DIYICIYINGGUANDAOKUODIBUWEIDEDINGMIAN,SUIJIZHENDAOMISHI;JIAOZHUZHUANGDINGYIXIA5mFANWEINEIHUNNINGTUSHI,YINGSUIJIAOZHUSUIZHENDAO,MEICIJIAOZHUGAODUBUDEDAYU1.5m。


   Ⅱ人工挖孔灌注桩施工


   6.6.5 人工挖孔桩的孔径(不含护壁)不得小于0.8m,且不宜大于2.5m;孔深不宜大于30m。当桩净距小于2.5m时,应采用间隔开挖。相邻排桩跳挖的最小施工净距不得小于4.5m。

亚博体育彩票6.6.6 RENGONGWAKONGZHUANGHUNNINGTUHUBIDEHOUDUBUYINGXIAOYU100mm,HUNNINGTUQIANGDUDENGJIBUYINGDIYUZHUANGSHENHUNNINGTUQIANGDUDENGJI,BINGYINGZHENDAOMISHI;HUBIYINGPEIZHIZHIJINGBUXIAOYU8mmDEGOUZAOGANGJIN,SHUXIANGJINYINGSHANGXIADAJIEHUOLAJIE。

亚博体育彩票6.6.7 RENGONGWAKONGZHUANGSHIGONGYINGCAIQUXIALIEANQUANCUOSHI:

    1 KONGNEIBIXUSHEZHIYINGJIRUANPATIGONGRENYUANSHANGXIA;SHIYONGDEDIANHULU、DIAOLONGDENGYINGANQUANKEKAO,BINGPEIYOUZIDONGKAJINBAOXIANZHUANGZHI,BUDESHIYONGMASHENGHENILONGSHENGDIAOGUAHUOJIAOTAJINGBITUYUANSHANGXIA;DIANHULUYIYONGANNIUSHIKAIGUAN,SHIYONGQIANBIXUJIANYANQIANQUANQIDIAONENGLI;

    2 MEIRIKAIGONGQIANBIXUJIANCEJINGXIADEYOUDU、YOUHAIQITI,BINGYINGYOUXIANGYINGDEANQUANFANGFANCUOSHI;DANGZHUANGKONGKAIWASHENDUCHAOGUO10mSHI.YINGYOUZHUANMENXIANGBINGXIASONGFENGDESHEBEI,FENGLIANGBUYISHAOYU25L/s;

    3 KONGKOUSIZHOUBIXUSHEZHIHULAN,HULANGAODUYIWEI0.8m;

亚博体育彩票    4 WACHUDETUSHIFANGYINGJISHIYUNLIKONGKOU,BUDEDUIFANGZAIKONGKOUZHOUBIAN1mFANWEINEI,JIDONGCHELIANGDETONGXINGBUDEDUIJINGBIDEANQUANZAOCHENGYINGXIANG;

    5 SHIGONGXIANCHANGDEYIQIEDIANYUAN、DIANLUDEANZHUANGHECHAICHUBIXUZUNSHOUXIANXINGXINGYEBIAOZHUN《SHIGONGXIANCHANGLINSHIYONGDIANANQUANJISHUGUIFAN》JGJ 46DEGUIDING。

6.6.8 KAIKONGQIAN,ZHUANGWEIYINGZHUNQUEDINGWEIFANGYANG,ZAIZHUANGWEIWAISHEZHIDINGWEIJIZHUNZHUANG,ANZHUANGHUBIMOBANBIXUYONGZHUANGZHONGXINDIANXIAOZHENGMOBANWEIZHI,BINGYINGYOUZHUANRENFUZE。

6.6.9 DIYIJIEJINGQUANHUBIYINGFUHEXIALIEGUIDING:

亚博体育彩票    1 JINGQUANZHONGXINXIANYUSHEJIZHOUXIANDEPIANCHABUDEDAYU20mm;

亚博体育彩票    2 JINGQUANDINGMIANYINGBICHANGDIGAOCHU100~150mm,BIHOUYINGBIXIAMIANJINGBIHOUDUZENGJIA100~150mm。

6.6.10 XIUZHUJINGQUANHUBIYINGFUHEXIALIEGUIDING:

    1 HUBIDEHOUDU、LAJIEGANGJIN、PEIJIN、HUNNINGTUQIANGDUDENGJIJUNYINGFUHESHEJIYAOQIU;

    2 SHANGXIAJIEHUBIDEDAJIEZHANGDUBUDEXIAOYU50mm;

亚博体育彩票    3 MEIJIEHUBIJUNYINGZAIDANGRILIANXUSHIGONGWANBI;

    4 HUBIHUNNINGTUBIXUBAOZHENGZHENDAOMISHI,YINGGENJUTUCENGSHENSHUIQINGKUANGSHIYONGSUNINGJI;

亚博体育彩票    5 HUBIMOBANDECHAICHUYINGZAIGUANZHUHUNNINGTU24hZHIHOU;

    6 FAXIANHUBIYOUFENGWO、LOUSHUIXIANXIANGSHI,YINGJISHIBUQIANG;

    7 TONGYISHUIPINGMIANSHANGDEJINGQUANRENYIZHIJINGDEJICHABUDEDAYU50mm。

6.6.11 DANGYUYOUJUBUHUOHOUDUBUDAYU1.5mDELIUDONGXINGYUNIHEKENENGCHUXIANYONGTUYONGSHASHI,HUBISHIGONGKEANXIALIEFANGFACHULI:

    1 JIANGMEIJIEHUBIDEGAODUJIANXIAODAO300~500mm,BINGSUIWA、SUIYAN、SUIGUANZHUHUNNINGTU;

亚博体育彩票    2 CAIYONGGANGHUTONGHUOYOUXIAODEJIANGSHUICUOSHI。

6.6.12 WAZHISHEJIBIAOGAOHOU,YINGQINGCHUHUBISHANGDENITUHEKONGDICANZHA、JISHUI,BINGYINGJINXINGYINBIGONGCHENGYANSHOU。YANSHOUHEGEHOU,YINGLIJIFENGDIHEGUANZHUZHUANGSHENHUNNINGTU。

6.6.13 GUANZHUZHUANGSHENHUNNINGTUSHI,HUNNINGTUBIXUTONGGUOLIUCAO;DANGLUOJUCHAOGUO3mSHI,YINGCAIYONGCHUANTONG,CHUANTONGMODUANJUKONGDIGAODUBUYIDAYU2m;YEKECAIYONGDAOGUANBENGSONG;HUNNINGTUYICAIYONGCHARUSHIZHENDAOQIZHENSHI。

6.6.14 DANGSHENSHUILIANGGUODASHI,YINGCAIQUCHANGDIJIESHUI、JIANGSHUIHUOSHUIXIAGUANZHUHUNNINGTUDENGYOUXIAOCUOSHI。YANJINZAIZHUANGKONGZHONGBIANCHOUSHUIBIANKAIWA,TONGSHIBUDEGUANZHUXIANGLINZHUANG。


6.7 灌注桩后注浆


▼ 展开条文说明


6.7.1 灌注桩后注浆工法可用于各类钻、挖、冲孔灌注桩及地下连续墙的沉渣(虚土)、泥皮和桩底、桩侧一定范围土体的加固。
▼ 展开条文说明

6.7.2 后注浆装置的设置应符合下列规定:

亚博体育彩票    1 HOUZHUJIANGDAOGUANYINGCAIYONGGANGGUAN,QIEYINGYUGANGJINLONGJIAJINGJINBANGZHAGUDINGHUOHANJIE;

    2 ZHUANGDUANHOUZHUJIANGDAOGUANJIZHUJIANGFASHULIANGYIGENJUZHUANGJINGDAXIAOSHEZHI,DUIYUZHIJINGBUDAYU1200mmDEZHUANG,YIYANGANGJINLONGYUANZHOUDUICHENGSHEZHI2GEN;DUIYUZHIJINGDAYU1200mmERBUDAYU2500mmDEZHUANG,YIDUICHENGSHEZHI3GEN;

亚博体育彩票    3 DUIYUZHUANGZHANGCHAOGUO15mQIECHENGZAILIZENGFUYAOQIUJIAOGAOZHE,YICAIYONGZHUANGDUANZHUANGCEFUSHIZHUJIANG;ZHUANGCEHOUZHUJIANGGUANFASHEZHISHULIANGYINGZONGHEDICENGQINGKUANG、ZHUANGZHANGHECHENGZAILIZENGFUYAOQIUDENGYINSUQUEDING,KEZAILIZHUANGDI5~15mYISHANG、ZHUANGDING8mYIXIA,MEIGE6~12mSHEZHIYIDAOZHUANGCEZHUJIANGFA,DANGYOUCULITUSHI,YIJIANGZHUJIANGFASHEZHIYUCULITUCENGXIABU,DU