Taking the deep foundation pit project of a riverside subway tunnel in the first-class terrace of the Yangtze Riv-er in Wuhan as an example,the Midas GTS NX numerical simulation software is used to establish a simulation model,an-alyze the deformation characteristics of the supporting structure in the excavation of the foundation pit,and establish two models considering the confined water and not considering the confined water for comparative analysis.The examples show the general deformation of ground wall is like a"bow",the shape is large in the middle and small at the ends.The plane shape of foundation pit has an important effect on displacement distribution,long side due to the large span,earth pressure is more concentrated,so the long side is greater than the displacement of the short side.Considering the confined water and not considering the confined water have a greater impact on the supporting structure and the surrounding envi-ronment.In this foundation pit,the contribution rate of the confined water pressure to the maximum deformation of the di-aphragm wall is 36%,and the deformation of the diaphragm wall is obviously affected by the confined water.The contri-bution rate of confined water to the plane displacement of subway tunnel is 24%,and the contribution rate to the settle-ment value of subway tunnel is 96%.The settlement of subway tunnel is obviously affected by the precipitation of con-fined water.The research results can provide reference for similar projects in the future to find out the main influencing factors of controlling the deformation of subway tunnels and take targeted measures.
numerical simulationdeep foundation pitsubway tunnelconfined waterdeformation
维普
万方数据
