基坑施工对已建下卧地铁影响有限元仿真分析

摘要

Taking the actual engineering as the background,in order to reduce the impact of foundation pit construction upon surrounding subway tunnel,the paper carries out numerical simulation by adopting FLAC3D three dimensional finite element.Through analyzing foundation pit dewatering and soil excavation and other construction process,it obtains the impacts of foundation pit construction process upon subway tunnel displacement,which has provided beneficial guidance for similar project.%以某实际工程为背景,针对如何减小基坑施工对周围地铁隧道的影响问题,采用FLAC3D三维有限元进行了数值模拟,通过分析基坑降水及土体开挖等施工全过程,得到了基坑施工过程对地铁隧道位移的影响,为类似工程提供有益指导。