單樁(抗拔)承載力計(jì)算

1、工程名稱(chēng):1.計(jì)清遠(yuǎn)廠區(qū)廠房162.編樁類(lèi)別：計(jì)算公式:混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范GB50010-2010廣東省建筑地基基礎(chǔ)設(shè)計(jì)規(guī)范DBJ15-31-2003第10.2節(jié)CFG孔樁樁身直徑d(mm)400樁端承載土層:強(qiáng)風(fēng)化巖樁端阻力特征值qpa(kPa)=3500單樁豎向極限承載力標(biāo)準(zhǔn)值Quk=Qsk+Qpk=u工qsikli+qpkAp單樁豎向抗拔載力特征值Rta=Up刀入iqsiali+0.9GpQpk(kN)=qpkAp=439.8式(式8.(8.5樁.單5-層序巖土名稱(chēng)樁側(cè)摩阻力特征值qsia(kPa)抗拔系數(shù)入i巖土厚度li(m)ZK2ZK3ZK13ZK17ZK25ZK26ZK32ZK38

2、ZK37ZK33ZK20ZK5ZK241素填土120.701.33.71.83.42.73.12.72.73.53.93.74.32粉質(zhì)黏土300.72.73.43.5005.81333.22.805.13-1細(xì)沙90.5000001.70000001.33-2淤泥質(zhì)土1100000000000001.13-3中砂350.5004.502002200.7004粉質(zhì)黏土400.754.24.66.457.71.96.1445.13.87.505-1全風(fēng)化巖700.53.53.803.6502.24.14.84.84.72.82.93.95-2強(qiáng)風(fēng)化巖12011111111111115-3中風(fēng)化巖

3、1011有效樁長(zhǎng)L(m)=11.212.716.311.913.114.314.316.516.516.51414.115.7單樁豎向承載力特征值Ra計(jì)算Rsa=Up工qsiaTi=81284476882367771890310161016994783839781Ra=Rsa+Rpa=1252128412081263111711581342145614561434122312791221極差(不應(yīng)超過(guò)30%)3%0%6%2%13%10%5%13%13%12%5%0%5%單樁豎向承載力1284特征值Ra平均值1284kN,特樁值向承載均值kN,實(shí)取單樁豎向承載力特征值Ra=1700kN單樁抗拔Up工入iqsiali401418392406351355454504504508387430359樁自重0.9Gp=19222820222424282828242427kN1.6956力Rta計(jì)算樁身周長(zhǎng)u(mm)=nd=1256.6mm抗拔力Rta計(jì)算單樁抗拔特征值Rta=4204404204273733794785315315