Analysis of deformation law of envelope structure of station under unbalanced pressure
In order to study the deformation of the eccentrically stressed station enclosure structure during the construction process,the foundation pit project of Jinqiao Station of Nanning Rail Transit Line 5 was taken as the research object,and PLAXIS software was used to carry out numerical simulation on the excavation process of the foundation pit,and compared the simulation calculation results and monitoring statistical results,study the deformation law of foundation pit.The research shows that the internal force and displacement of the eccentrically stressed enclosure structure increase with the deepening of the excavation depth of the foundation pit.Under the bias load,the vertical displacement and deformation curves of the ground on both sides of the foundation pit are grooved,and the surface settlement on the active pressure side is larger than that on the passive pressure side.The axial force of the first support increases with the increase of the excavation depth.Affected by the bias load,the piles on both sides of the foundation pit shifted to the passive pressure side as a whole,and the piles on the active pressure side shifted to the inside of the foundation pit,and the deformation curve was in a spoon shape.The numerical simulation results are in the same trend as the monitoring statistical results,but the numerical values are small.The comparative analysis shows that the numerical simulation has certain reliability.
subway stationbiased envelope structuremonitoring analysisnumerical simulationdeformation law
万方数据
维普
