某人行地道工程对既有地铁隧道的影响分析

Numerical Analysis of the Influence of Pipe Jacking on the Existing Subway Tunnel

本文结合某市政人行过街通道明挖基坑工程位于既有地铁既有隧道的工程案例,利用三维数值模拟软件Midas/GTS对该基坑工程施工全阶段过程引起的地铁隧道结构的变形和内力进行建模分析,根据分析结果判断既有隧道工程的安全性,并给出相关优化建议。对比数值模拟结果与地铁保护要求的相关数据,地铁隧道变形和裂缝均满足地铁保护要求,结构安全。

Combined with the engineering case that the open excavation foundation pit project of a municipal pedestrian crossing is located in the existing subway tunnel,this paper uses the three-dimensional numerical simulation software MIDAS/GTS to model and analyze the deformation and internal force of the subway tunnel structure caused by the whole stage of the construction of the foundation pit project,judge the safety of the existing tunnel project according to the analysis results,and give relevant optimization suggestions.Comparing the numerical simulation results with the relevant data of subway protection requirements,the deformation and cracks of subway tunnel meet the subway protection requirements and the structure is safe.