基坑周边超载作用位置对基坑支护结构变形的模拟分析

Simulation Analysis of Overload Position around Foundation Pit on Supporting Structure Deformation of Foundation Pit

以地铁车站某深基坑工程为背景,利用FLAC3D有限差分软件,建立合适的模型对基坑采用超载距基坑长边和短边远近不同的三种工况进行分层分步开挖,根据FALC3D软件计算的结果分别对三种不同工况在各层开挖过程中的地下连续墙的变形进行对比分析,总结出超载距基坑长边和短边远近对支护结构安全的影响规律。

Taking a deep foundation pit project of metro station as the background, the article introduces the use of FLAC3 D finite difference software to establish the suitable model for excavating the foundation pit by layers and steps under three different conditions of long side, short side and far-near position from overload to pit. Based on the calculation results of FLAC3 D software, the article compares and analyzes the deformations of underground diaphragm wall in the excavation of each layer under three different conditions,and sums up the effect law of three different conditions on the safety of supporting structure.