Analysis on Influence of Foundation Pit Excavation Method on Adjacent Existing Foundation in Urban Dense Area
Based on the foundation pit engineering of a subway station adjacent to the existing intercity railway pile foundation in Chaoshan area,this paper uses PLAXIS 3D numerical simulation software to compare and analyze the deformation law of adjacent viaduct pile foundation caused by deep foundation pit excavation under the construction conditions of open cut construction method and cover and cut-top down construction method,and discusses the deformation characteristics of the main structure of the station in each construction stage under two working conditions.The results show that the horizontal displacement of adjacent pile foundation caused by foundation pit excavation is in the form of bulging belly;compared with the open cut construction method,the horizontal deformation of the adjacent pile foundation caused by the inverse construction method is reduced by about 25%.Therefore,the use of inverse construction method can reduce the influence on the surrounding environment and traffic,and reduce the structural deformation to a certain extent.
urban dense areametro constructionfoundation pit excavationcover and cut-top down construction methodpile foundation deformation
NETL
NSTL
万方数据
