Three-dimensional Numerical Analysis of Metro Foundation Pit Deformation Considering the Effect of Dewatering and Excavation
In order to investigate the difference in deformation response at different typical locations during the construction of a subway foundation pit,a three-dimensional numerical model was established by using finite element software based on the foundation pit project of a certain subway station.The simulated values are consistent with the measured values,verifying the accuracy of the numerical simulation.Different construction conditions and excavation depths were taken into consideration according to the above numerical model,and the lateral movement of diagram wall and surface settlement at the middle section and the end well were analyzed.The results show that the lateral movement patterns of diagram wall is bulging-type,and the surface settlement patterns is groove-type;Compared with the middle section,the lateral movement of diagram wall and surface settlement outside the pit at the end well are smaller;Compared with dewatering and excavation,dry sand excavation causes smaller lateral movement of diagram wall and surface settlement outside the pit;As the excavation depth increases,the lateral movement of diagram wall and the surface settlement outside the pit increase significantly.
deep foundation pitdewatering and excavationnumerical simulationdeformation of structuresurface settlement
万方数据
维普
