Abstract: The performance of the supporting structure and the excavation process of a cut and cover tunnel were numerically simulated by using ANSYS software. The deep soil deformation and the ground subsidence adjacent to the deep excavation areas are presented. The results indicate that performance excavation and the support structure are the problem of interactions among the supporting structure, soil inside the excavated area and soil behind the supporting structures. The supporting structure selections have a significant influence on the adjacent environments, soil behind the structure and the soil inside the excavated area.

Key words: Subway Tunnel, Deep Excavation, Numerical simulation