樁基礎(chǔ)負(fù)摩阻計(jì)算表格V2.0

,,,樁基礎(chǔ)負(fù)摩阻力計(jì)算,,,,,,,,,,,,,,,,,

樁直徑,D,0.5,m,,,,,,,,,,,,,,,,,

樁面積,A,0.196,m2,,,,,,,,,,,,,,,,,

樁周長,u,1.571,m,,,,,,,,,,,,,,,,,

地面超載,p,5.00,kpa,,,,,,,,,,,,,負(fù)摩阻力系數(shù)ζn,,,,

地下水標(biāo)高,,-1.80,m,,,,,,,,,,,,,,,,,

,,,,,,,,,,,,,,,,表5.4.4-1,,,,

,鉆孔編號(hào),土層,層頂標(biāo)高,厚度(m),正摩阻力標(biāo)準(zhǔn)值(Kpa),重度γ(KN/m3),地下水重度(KN/m3),有效重度γ'(KN/m3),負(fù)摩阻力系數(shù)ζn,樁周土平均有效應(yīng)力(KN/m3),負(fù)摩阻力標(biāo)準(zhǔn)值(Kpa),下拉荷載標(biāo)準(zhǔn)值(KN),,,,土類,ζn,,,

,,,,,,,,,,,,,,,,飽和軟土,0.15~0.25,,,

,ZK1,1填土,3.00,2.62,50.00,19.40,10.00,19.40,0.20,30.41,6.08,25.03,,,,黏性土、粉土,0.25~0.40,,,

,,2淤泥質(zhì)粉質(zhì)粘土,0.38,0.00,50.00,18.20,10.00,18.20,0.22,60.83,13.38,0.00,,,,砂土,0.35~0.50,,,

,,3中砂,0.38,6.30,50.00,19.90,10.00,13.36,0.45,107.91,48.56,480.56,,,,自重濕陷性黃土,0.20~0.35,,,

,,3-1淤泥,-5.92,0.00,50.00,16.20,10.00,6.20,0.22,155.00,34.10,0.00,,,,注：1、在同一類土中，對(duì)于擠土樁，取表中較大值,,,,

,,4淤泥質(zhì)粉質(zhì)粘土,-5.92,5.34,50.00,17.50,10.00,7.50,0.22,180.02,39.61,332.21,,,,對(duì)于非擠土樁，取表中較小值,,,,

,,中性點(diǎn),-11.26,3.02,50.00,17.50,10.00,7.50,,216.37,0.00,0.00,,,,2、填土按其組成取表中同類土的較大值,,,,

,,6粉砂,-14.28,-14.28,50.00,17.50,10.00,7.50,,179.15,0.00,0.00,,,,,,,,

,,,,,,,,,,130.60,0.00,0.00,,,,,,,,

,,,,,,,,,,135.60,0.00,0.00,,,,中性點(diǎn)深度ln,,,,

,,合計(jì),,,,,,,,,,837.80,,,,表5.4.4-2,,,,

,,,,,,,,,,,,,,,,持力層性質(zhì),黏性土、粉土,中密以上砂,礫石、卵石,基巖

,,,,,,,,,,,,,,,,中性點(diǎn)深度比ln/l0,0.5~0.6,0.7~0.8,0.9,1

注：,中性點(diǎn)深度由《建筑樁基技術(shù)規(guī)范》(JGJ94-2008)表5.4.4-2確定。,,,,,,,,,,,,,,,,,,,

,本表格考慮地面超載和地下水共同作用下的負(fù)摩阻力。,,,,,,,,,,,,,,,中性點(diǎn)深度ln應(yīng)按樁周土層沉降與樁沉降相等的條件計(jì)算確定，也可參照表5.4.4-2確定。,,,,

,,,,,,,,,,,,,,,,注：1、ln、l0——分別為自樁頂算起的中性點(diǎn)深度和樁周軟弱土層下限深度；,,,,

,,,,,,,,,,,,,,,,2、樁穿過自重濕陷性黃土層時(shí)，ln可按表列值增大10％（持力層為基巖除外）；,,,,

,,,,,,,,,,,,,,,,3、當(dāng)樁周土層固結(jié)與樁基固結(jié)沉降同時(shí)完成時(shí)，取ln=0；,,,,