道路施工对地铁结构变形的数值模拟研究

NUMERICAL SIMULATION STUDY ON DEFORMATION OF SUBWAY STRUCTURE CAUSED BY ROAD CONSTRUCTION

在地铁结构周边施工道路,不可避免地会引起地层及地铁结构的变形,以南宁轨道交通2号线东延工程配套道路工程为例,采用有限元数值模拟,对施工过程中的12种工况进行模拟,得出各种工况下暗挖区间、车站、C出入口及3号风亭、D出入口结构的变形值,根据最大变形值,为施工最大变形时工况提供安全方面的建议。

The construction of roads around the subway will inevitably cause the deformation of strata and subway structure.Taking the assistant project of Nanning Rail Transit Line 2 East extension project as an example,this paper uses finite element numerical simulation to simulate 12 working conditions in the construction process,and obtains the deformation values of soil mass,concealed excavation section,station,C entrance,3 wind Pavilion and D entrance structures under various working conditions.According to the maximum deformation value,Provide safety suggestions for the working condition when the construction has the maximum deformation.