Influence of Soil Models on Numerical Simulation of Geotechnical works in Bangkok subsoil

Abstract

In the present paper, series of analyses of geotechnical works in Bangkok subsoil using three soil models with different levels of complexity are carried out by FEM and discussed with observed data. The analyses presented include pile load test, deep excavation and tunneling. The results obtained by using Mohr-Coulomb model, Hardening Soil model, Hardening Soil model with small strain stiffness are compared. The impacts of the chosen constitutive models on numerical analysis of such geotechnical works are shown. It can be concluded that using more sophisticated constitutive models which includes non-linear pre-failure and high stiffness under very small strain considerably improves the movement prediction.