ABSTRACT
The stability of soil slope is analyzed through explicit Lagrangian finite-difference method based on the strength reduction method. Slope stability comes down to many parameters such as gravity of soil, dilatation angle, cohesion and internal friction angle. The single parameter is analyzed to reveal the most important influence to the slope stability. Dilatation occurs before the peak strength and terminates to material failure. Soil becomes loose and shear strength reduces because of dilatation. So the dilatation angle should not be ignored in the slope stability calculation. Adopting non-associated flow rule which Ignores dilatation will underestimate the shear strength of soil in the stability analysis of slope based on elastic-plastic model. Cohesion which is one of the strength parameters represents the cementation of soil. The shear strength of soil is related to internal friction angle which influences the stability of soil slope. The stability of soil slope is one of the hot problems because of the harmfulness and its complexity.
