ABSTRACT
This chapter discusses a nonlinear elastic unloading model for soft soil and a nonlinear elastic unloading damage model for soft soil in detail. It describes the application of non-linear elastic unloading damage model to an engineering case, which is one of the most important parts of the project “The Outer Ring Tunnel Project of Shanghai”. The chapter introduces the outline and assumption of a finite element model (FEM) to analyze big and deep excavation engineering in deformation of wall and earth pressure on wall. It also presents the results of FEM analysis.
