Influence of Large Foundation Pit Excavation on Adjacent Subway Tunnel

Abstract

The finite element software and finite difference software are used to complete the dynamic simulation of the excavation process and the influence of the foundation pit on the additional deformation of the subway tunnel. The horizontal displacement occurs around the foundation pit due to the excavation, and at the bottom there is vertical uplift deformation. The deformation of the subway tunnel occurred due to the unloading deformation at the bottom of the foundation pit, and the whole tunnel is deformed to the foundation pit. Moreover, the tunnel deformation near the foundation pit is larger than the tunnel deformation far away from the foundation pit.