施工加载过程中软土地基灰堤的沉降分析

The Analysis of Settlement of Ash Embankment in Soft Foundation in Construction Process

通过对某软土地基上考虑施工加载过程时灰堤沉降进行应力与孔隙水耦合分析,计算得到该软土地基上灰堤基底总沉降为-1.106 m;本灰堤施工时,对周围地面主要的影响发生在灰堤内侧,最大地表隆起为0.316 m,最大水平位移为0.588 m,影响范围约为15 m;水泥土搅拌桩对竖向位移的减小作用较为显著;当塑料排水板的渗透系数增大时,各级加载时基底的沉降增大,但施工期完成后,总沉降量基本不变。

A coupled analysis of stress and seepage for settlement of ash embankment in soft foundation considering construction process is done,the result shows that the total settlement of ash embankment is-1.106 m.When constructing the ash embankment,the main effect on the ground is appears in inner side of ash embankment,the maximum upheaval is 0.316 m,the maximum horizontal displacement is 0.588 m,the range of influence is about 15 m.The cement mixing pile has a great effect to decrease the vertical displacement.When the permeability coefficient of plastic drainage plate increase,the settlement in different construction process will increase also,but has little effect on the total settlement.