嵌固深度对地下连续墙性状影响的模拟计算

Simulation Calculation for Influence of Embedded Depth on Diaphragm Wall

结合天津地区实际基坑工程,基于PLAXIS软件,对不同嵌固深度下地下连续墙的变形情况进行了分析,得到了地下连续墙最大水平位移与地连墙嵌固深度的关系,同时还分析了嵌固深度对地下连续墙力学性状的影响.结果表明:在一定范围内,地连墙嵌固深度越大,基坑稳定性越高,产生的最大位移值越小,其合理的嵌固深度约为坑深的0.65倍.所得结论对于基坑工程设计施工有一定的借鉴意义.

In view of actual excavation projects in Tianjin, the analysis of the deformation of diaphragm wall is made in different embedded depths by PLAXIS program. The relationship between embedded depth and the maximum horizontal displacement of diaphragm wall is found out. The mechanical properties of diaphragm wall in different embedded depths are studied, too. It is shown that in some scope the larger the embedded depth is, the higher the stability Of the wall will be, and the smaller the maximum value of horizontal displacement will be. Its reasonable embedded depth is about 0.65 times of the pit depth. The conclusion drawn from the paper may give some reference to the design and construction of similar excavation projects.