ABSTRACT
In the analysis the slope is simplified to be straight and the width of sliding mass is assumed to be infinite. The modeling of slope in two-dimensional condition with the simplifications leads to lower slope stability; that is, lower safety factor is obtained, compared with that in three-dimensional condition. This chapter discusses a series of stability analyses of cohesive soil slopes with limit equilibrium method to clarify the effect of three-dimensional shapes of sliding mass and slope on the slope stability. In the analyses, straight and curved slopes consisting of frictionless soil were examined; the curved slopes were defined with concentric circles instead of straight lines, and sliding surfaces were defined with elliptic revolution. In the analysis of slope stability with finite width of sliding mass in three-dimensional condition, end effect always increased the stability consistently both in straight and curved slopes.
