ABSTRACT
This chapter discusses the example of HanJiaYa landslide in Xiangshi Expressway to analyze slope stability in natural condition and its strain characteristics with finite difference numerical method based on strength reduction combined with the improved slope failure criterion. It explores the exiting criteria of slope failure and relevant limitations. The FLAC method based on finite difference technique can simulate the behaviour of slope geomaterials which undergo plastic flow when their yield limits are reached. Strength reduction technique is a preferable way to solve the factor of safety of the slope with numerical calculation technique and is more and more widely applied at present. Slope failure necessarily needs a continuous sliding plane, and the run-through of plastic zone is the minimum shear strength area within the slope which provides conditions for the movement of sliding mass.
