Study on stress distribution in the soft ground improved by deep cement mixing and geotextilereinforced supported road embankment in Tien Giang

Abstract

The soil stabilization method, called Deep Mixing Method, is often applied for soft soil layers in the alluvial plain, such as the Mekong Delta. In this study, a nonlinear Finite Element Method (FEM), as programmed as commercial PLAXIS software, is used for the stress distribution in the soft ground improved by deep cement mixing and geotextile - reinforced supported road embankment in Tien Giang. By this nonlinear FEM, the responses and behaviors of the cement column during stabilizing the soft soil is clearly shown through the distribution of the stress both in the cement column and in the soft soil layers. The stress distribution and the deformation in the foundation improved by Deep Mixing Method are analyzed using nonlinear FEM in which stress-strain relation is elasto-plastic. The stress distribution in cement column and the differential settlement obtained by the FEM analysis are applied to more detailed specification of the configuration of cement column.