Influence of Metro Tunnel Excavation on Existing Underground Passage Building Structure
To predict the influence of Changzhou metro line 1 through an underground passage in Shanghai-Nanjing intercity railway station,using the FLAC 3D to simulate the metro tunnel excavation process,studied the influence of strata with or without the existing station underground passage,analyzed the deformation and stress distribution of underground gallery.The results show that the existence of the underground passage caused an obvious barrier effect,and the settlement of different strata is different.The maximum settlement value is 11.27 mm;Tunnel excavation is mainly caused by the tilt of the underground passage,the deformation of the floor of the staircase and the interface between the escalator and the underground passage.The influence of tunnel excavation on the stress change of the underground tunnel is small,and maximum stress value is 20.63 MPa.To prevent stress concentration,it is still necessary to focus on monitoring the right interface of the underpass and the right exit of the escalator during tunnels construction.
tunnelingstation underpassnumerical simulationdeformation analysisstress distribution
万方数据
维普
