Abstract: Strict deformation control was applied to a deep excavation near an active shielded metro tunnel due to the safety concern of the metro operation. This paper presents the analytical results of this large depth deep excavation with a concentration on the important and difficult issues. Two different excavation support systems are proposed. The process of the excavation was simulated by using Finite Element Analysis considering the plane strain coupled with seepage. The final selected supporting system was based on the comparative studies of both systems. The predicted data are comparable with the observed data during the construction.

Key words: Metro Tunnels, Deep Excavations, FiniteElement Method, Plane Strain Coupled Seepage