Coupled Analysis of Residual Soil Slope subjected to Rainfall

Abstract

A residual soil slope is under investigation using a coupled mechanistic approach. The numerical code, DEFLOC (DEformation FLOw Coupled program), has been developed in the MATLAB environment that takes into account the basics of unsaturated soil behavior. Two-dimensional numerical modeling was performed based on the Galerkin's method applied to poro-elasticity.  The effects of hydraulic characteristics, matric suction and degree of saturation on the pore pressure and deformation behavior of a residual soil slope under rainfall were investigated. The results reveal a typical process of infiltration into unsaturated soil slopes.