Abstract: This paper presents a case history of a deep excavation in Shanghai. Based on the subsurface conditions of the proposed deep excavations, both gravity wall type and soil mixed wall (SMW) were used as the supporting structures. The excavation process, the performance of the supporting structures and the impact on the adjacent structures were numerically simulated by the finite element method. The results indicate that gravity wall and SMW are suitable as the supporting structures of the deep excavation.

Key words: Deep Excavation Support, Gravity Retaining Wall, Soil Mixed Wall, Environmental Impact