Three-dimensional fem analysis on mechanical characteristics of deping metro station foundation pit during project excavation

Abstract

Controlling the displacements of foundation pit walls and supporting structures is one of the most effective measures for ensuring safety of foundation pit construction. In this paper, the three-dimensional displacement field of Deping Station foundation pit, which is part of Shanghai Track Traffic Line 6 project, is computed by means of finite element method (FEM) and ANSYS software. Firstly, the element types and constitutive equations are selected. Secondly, the displacements and internal forces of supporting structures and soil medium are computed and the final computed results are analyzed. Finally, the sensitivity of computed results to dimensional variation of supporting structures and value variation of soil parameters is analyzed. The research result of current paper is very helpful for geotechnical construction and the development of geotechnical theory. © 2008 Science Press Beijing and Springer-Verlag GmbH Berlin Heidelberg Geotechnical Engineering for Disaster Mitigation and Rehabilitation.