FEM Modelling of Thin Weak Layers in Slope Stability Analysis

Modelling the presence and effect of a thin weak layer soil or rock in slope stability analysis performed through finite element method (FEM) presents several problems purely numerical nature. This paper deals with parametric three different 2D case studies (both ideal real) unstable potentially slopes containing soft band (or layer). The FEM software used is RS2 (Rocscience®). aim investigating influence some geometrical characteristics bands analyses. Mohr–Coulomb elastic-perfectly plastic constitutive model for all involved materials was assumed, mechanical parameters were kept constant. Instead, other fundamental layer, such as type mesh elements, density, geometry, terms both thickness outcrop shape, changed, results critical Strength Reduction Factor (SRF) compared. main outcomes this study represent practical suggestions on technical aspects to users analyses, order obtain precautionary assessment stability.