狭长基坑施工对邻近地铁隧道结构的影响分析

Analysis of influence of long and narrow foundation pit construction on adjacent subway tunnel structure

以苏州市某邻近地铁狭长基坑施工为研究背景,采用大型非线性通用有限元软件ABAQUS对基坑施工的全过程进行数值模拟,探究不同工况下的土体变形及邻近地铁隧道结构变形。根据数值模拟结果,基坑开挖过程中刚度较小的隧道结构易产生侧向变形,且变形趋势随两者距离减小而增大。

This paper uses large nonlinear general finite element software ABAQUS to conduct numerical simulations of the whole process of foundation pit construction near a subway in Suzhou city.The goal is to explore soil deformation under different working conditions and the deformation of adjacent subway tunnel structures.According to the numerical simulation results,tunnel structures with small stiffness are prone to lateral deformation during foundation pit excavation.This deformation trend increases with decreasing distance between them.