Analysis on Influence of Subway Deep Foundation Pit Construction on Deformation of Adjacent Tunnels
In order to study the stress and deformation characteristics of the existing tunnel during the construction of the subway deep foundation pit adjacent to the tunnel,taking the foundation pit project of Guanziqiao Station of Nanjing Metro Line 9 as the background and through 3D finite element analysis,the stress and deformation characteristics of the existing tunnel caused by the excavation of foundation pit are studied.The calculation result shows that the maximum settlement of the existing tunnel caused by the excavation of the subway foundation pit is 7.32 mm,and the maximum horizontal displacement is 5.74 mm.The tunnel deformation meets the requirements of relevant specifications.The displacement of the tunnel body along the Y and Z directions is much greater than that along the X direction.When the foundation pit is excavated,there will be a difference in settlement between the open section and the buried section of the tunnel.The corresponding measures should be taken to control the settlement difference during construction.
foundation pit excavationtunnel deformationfinite element analysisdeformation control
NETL
NSTL
万方数据
