LANDSLIDE FAILURE MORPHOLOGY-BASED METHOD FOR COMPREHENSIVELY EVALUATING SIDE SLOPE RISK

摘要

A landslide failure morphology-based method for comprehensively evaluating the side slope risk, which relates to the fields of side slope stability and risk evaluation. The method introduces a smooth particle hydrodynamics method, uses sliding distance and impact distance, and combines a classical limit equilibrium method to more intuitively and reasonably evaluate side slope stability and risk. The method comprises: according to statistical features of cohesion c and an internal friction angle φ, randomly generating n sets of combined values that meet the statistical features, and denoting same as {ci, φi}i=1n{c_i, φ_i}_i=1ⁿ; for an ith set of combined values, obtaining a minimum safety factor Fs_i of a side slope; using a smooth particle hydrodynamics method to analyze a sliding distance d_Ri and an impact distance d_Ii of the side side slope under the ith set of combined values; making i=i+1, repeating the previous two steps to obtain the minimum safety factor, the sliding distance and the impact distance of the side slope under all combined values; performing averaging processing to obtain an average safety factor, a sliding distance and an impact distance; and calculating a normalized sliding distance and impact distance according to the positions of slope top and bottom structures, and combining same with the average safety factor to comprehensively evaluate the risk of a landslide.