关键词: 深基坑, 隧道, 监测, 位移

Abstract: With the urbanization development, the subway has become an important mode of transportation. The excavation and unloading of excavated area will inevitably induce adverse stress and deformation on the adjacent subway tunnels, and even affect the safe operation of these tunnels. Based on a deep excavation project near a existing tunnel in Beijing, the monitored data of the tunnel settlement deformation, convergence deformation and track gauge are presented. The results are also compared with the tunnel displacement under different excavation conditions simulated by the finite element software. The deformations of the adjacent high-speed subway tunnel under the deep excavation are presented. The conclusions show that the excavation will induce settlement and convergent deformation to the tunnel. The closer the tunnel is to the excavated area, the more significant the tunnel settlement deformation and track gauge displacement. Timely completion of excavation support structure can reduce the deformation of adjacent tunnels.

Key words: Deep Excavation, Tunnel, Monitoring, Displacement