基于ABAQUS有限元的基坑开挖过程变形分析

Deformation Analysis of Foundation Pit Based on ABAQUS FEM Method

深层搅拌法地基处理在以地下连续墙为围护结构的基坑开挖工程中广泛应用,事前预测和模拟基坑变形值是必要的。基于abaqus有限元软件,结合新加坡地铁T302车站地基处理工程,设不同处理范围及不同深度,用以优化地基处理。结果表明,处理范围相同时降低处理深度,或处理深度相同时减小处理范围,地连墙变形值均不断降低,并不是处理范围越大深度越深,基坑变形值越小。

Deep mixing method is widely used in foundation pit excavation with underground diaphragm wall as the retaining structure, so it is necessary to predict and simulate the deformation value of foundation pit in advance. Based on the finite element software ABAQUS and combined with the foundation treatment project of Singapore MRT T302 Station, different treatment ranges and different depths are set to optimize the foundation treatment. The results show that reduce the depth when the treatment range is the same, or reduce the range when the treatment depth is same, the deformation of the diaphgram wall decreases continuously. It does not mean that the larger the treatment range and the deeper the depth, the smaller the deformation value of the foundation pit.