Study on the Influence of Spatial Effect of Foundation Pit Excavation on the Deformation of Operating Tunnel in Silt Area
This study discusses the problem that the excavation of foundation pit leads to the uplift deformation of the subway tunnel in operation,which affects the safety and stability of operation.Based on the project of Zhengzhou East Square,combined with the tunnel detection data in the excavation stage of foundation pit,the numerical model of foundation pit excavation is established,and the influence of the length,depth and width of foundation pit excavation on the deformation of the operating tunnel is analyzed.The measured results show that the deformation of the tunnel caused by the excavation of the foundation pit above the tunnel is mainly vertical deformation.Under the condition that the length and width of the excavation of the foundation pit remain unchanged,with the increase of the excavation depth of the foundation pit,the rebound amount of the foundation pit and the deformation of the tunnel below also increase.The research results have guiding significance for foundation pit engineering in silt area.
NETL
NSTL
万方数据
维普
