RESEARCH ON DEFORMATION CONTROL AND PROTECTION MEASURES FOR SUBWAY TUNNEL IN SUBWAY ROOF CONSTRUCTION
Taking the deep foundation pit of a seaside building above the subway tunnel in Shenzhen as the research object,the design and construction of foundation pits above completed subway tunnels under poor geological conditions such as silty soil are analyzed.A combination of grille reinforcement + uplift pile + ballast plate is applied as a subway protection measure to control the structural deformation of subway tunnels under foundation pits within the allowable range.The whole construction process is simulated with midas GTS 3D spatial finite element calculation software,and the impact of construction under subway structures under different working conditions is analyzed.Numerical simulation results show that the existing subway protection measures meet the requirements for safety control indicators of tunnel structures.The feasibility of the subway tunnel deformation control and protection are verified by means of automatic monitoring.
deep foundation pitsubway tunnelprotective measureconstruction simulationautomatic monitoring
NETL
NSTL
万方数据
维普
