Numerical Simulation of Column Supported Embankments with Geosynthetic Encased Columns Influence of Soft Soil Constitutive Model

摘要

This paper describes the results of three-dimensional finite element analyses that were carried out using the commercial computer program ABAQUS to simulate the behavior of column supported embankments (CSEs) that utilize geosynthetic encased columns (GECs) as the deep foundation elements. To examine the influence of the soft soil constitutive model on the numerical results, analyses were performed using modified Cam Clay, Mohr Coulomb, and linear elastic models for the soft soil. Existing laboratory results for soft Bangkok clay were used to calibrate the model parameters that were used in this paper. Numerical results demonstrate the influence of the soft clay constitutive model on the stresses that are transferred to the GECs, the values of maximum settlement, the lateral displacement of the GECs, and the hoop forces in the geosynthetic encasement.