Whole Process Numerical Simulation Study of Soft Soil Deep Foundation Pit Excavation Deformation of Subway Station
Deep foundation pit construction in soft soil will cause cracking of surrounding roads and settlement of adjacent structures.If the deformation is too large,it will have a negative impact on the surrounding buildings.In this paper,the subway station of Hongqiao Station of Nanjing Metro Line 5 is taken as the research background.Based on the finite element software,a three-dimensional numerical model of the whole process excavation of the deep foundation pit of the subway is established.The Mohr-Coulomb constitutive model is used to simulate the mechanical behavior of the soil.The supporting structure and the deformation of the foundation pit soil during the excavation of the soft soil foundation pit are analyzed.The comparison with the actual measurement shows that the lateral displacement is consistent with the actual measurement,and the settlement is smaller than the actual measurement.The reason may be that the temporary load in the construction process is not reflected in the numerical simulation,so the difference between the two is caused.Therefore,in the actual construction,the ground overload around the foundation pit should be controlled to avoid excessive settlement and surface tilt.
excavation of foundation pitnumerical simulationdeformation of soft soil foundation pitfield monitoring
万方数据
维普
