CAJ | 학술논문

采用孔扩张理论对静压桩挤土效应进行模拟计算，假定地基土符合修正剑桥模型，推导得出单桩压入过程中土体位移和孔隙水压力的解析表达式。以此为基础，通过叠加得到群桩压入过程中桩周土体挤土效应的理论解答。同时，在杭州地区进行了群桩静力压入的现场试验，发现桩周土体的水平位移随离排桩的距离呈指数衰减。解析计算值与试验结果较接近，证明了该模拟计算方法的有效性。
채용공확장이론대정압장제토효응진행모의계산，가정지기토부합수정검교모형，추도득출단장압입과정중토체위이화공극수압력적해석표체식。이차위기출，통과첩가득도군장압입과정중장주토체제토효응적이론해답。동시，재항주지구진행료군장정력압입적현장시험，발현장주토체적수평위이수리배장적거리정지수쇠감。해석계산치여시험결과교접근，증명료해모의계산방법적유효성。
Both the excess pore press and soil displacement induced by single pile installation were obtained by taking the soil as modified Cambridge model.Accordingly,the theoretical formula was obtained on the compacting effects caused by the installa-tions of a group of this type piles.Meanwhile,some tests were conducted in Hangzhou,in which a trend of a logarithmic decay trend of horizontal soil displacement with the radial distance were observed.It is proved that this proposed theoretical method is feasible as the values calculated by the presented formula are consistent with the field test results.