ANALYSIS OF THE INFLUENCE OF LONG AND NARROW FOUNDATION PITS IN SOFT SOIL AREA ON THE DEFORMATION OF UNDERGROUND SUBWAY STATION
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.
narrow and long foundation pitunderlying subway stationgroup excavation of foundation pitmetro deformationexcavation sequence
万方数据
维普
