Three-dimensional nonhomogeneous slope failure analysis by the strength reduction method and the local strength reduction method

摘要

A numerical model of three-dimensional (3D) ancient landslide stability analyses is by the local strength reduction method (LSRM) and the strength reduction method (SRM). A numerical model of three-dimensional (3D) ancient landslide stability analyses is by the local strength reduction method (LSRM) and the strength reduction method (SRM). However, it is obvious that the slope is instability when the sliding soil is sufficiently weakened. In this paper, the LSRM is adopted that represents the slip zone weakened by an ancient landslide in the FLAC3D. The authors have founded many unexpected results about the value of FOS, computing time and the symmetrical plane displacement by comparing the LSRM and the SRM. It is also found that the value of FOS of 3D slope with weak layer is closely related to the local load.