建筑基坑施工对近接地铁隧道的影响分析

摘要

某建筑基坑工程临近既有地铁区间隧道。为明确基坑开挖、支护对地铁隧道的影响，验证基坑支护方案的安全可靠性，本文采用PLAXIS有限元程序进行空间模型分析。结果表明，基坑工程在正常施工条件下对相邻轨道交通设施的影响在允许范围之内，可为今后的类似工程提供参考。%A building foundation pit engineering near the existing subway tunnel. To make clear the influence on metro tunnel of the excavation and support of foundation pit, and also to verify the safety and the reliability of foundation pit supporting scheme, this paper uses PLAXIS finite element program to make a space model analysis. The results show that the influence of foundation pit engineering on the adjacent track traffic facilities is within the allowable range on normal construction conditions, it can provide a reference for the similar projects in the future.