In the finite element simulation of foundation pit excavation, the stiffness matrix of soil, the external loads and the excavation load are changed with the increasing depth.
在对基坑开挖的有限元模拟中，土体刚度矩阵、外荷载和开挖荷载等都随开挖深度的变化而变化。
Stiffness variation of backfilled soil played a small role on superstructure response when the substratum was relative stiff and the box foundation embedment was shallow.
箱基埋置深度浅、下卧土层刚度较大时，箱基周围回填土属性对结构反应影响不大；
The dynamic properties of block on the composite foundation with single column are related to the column dimensions and stiffness of soil surrounding the column.
单桩复合地基上块体的动力特性与竖向增强体的尺寸、桩周土的刚度等有关。
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