The excavation of pipeline foundation pit group often affects the safety of adjacent subway structures. A foundation pit group near a subway pipeline in Tianjin is taken to study the influence of the narrow and long founda-tion pit, the distance between the subway and the foundation pit, and the excavation sequence of the foundation pit on the deformation of the adjacent subway by using the MidasGTS-NX numerical analysis software. The results show that the influence of the excavation of the narrow and long pipeline foundation pit group on the surrounding build-ings is affected by the long side effect of the narrow and long foundation pit, the structural distance between the foun-dation pit and the subway station, and the excavation sequence of the pipeline foundation pit. The excavation and un-loading of the pipeline foundation pit at the nearest spot to the subway station structure cause the structural deforma-tion of the subway station to increase, accounting for about 50％～90％of the total deformation.
关键词
狭长型基坑/下卧地铁车站/基坑群挖/地铁变形/开挖顺序
Key words
narrow and long foundation pit/underlying subway station/group excavation of foundation pit/metro deformation/excavation sequence
维普
万方数据