Abstract
Natural slopes are non-homogeneous in nature, which behave differently than homogeneous slopes. The non-homogeneity in slopes exist in various ways, which include change in stratifications and/or shear strength parameters (cohesion, friction angle) with depth, presence of saturated–unsaturated zones, etc. This study is performed to show the effect of non-homogeneity due to different types of soils on the stability of two-layered slopes. Homogeneous and two-layered non-homogeneous models of soil slope are prepared with three different fine-grained and coarse-grained types of soils. Both the limit equilibrium method and finite element methods were used to evaluate the stability of the slopes and the results are presented in terms of safety factors along with the corresponding critical slip surfaces. Slopes with coarse-grained soil showed translational type of failure, while rotational failure was observed for fine-grained slopes.
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