Slope risk comprehensive evaluation method based on landslide failure form

The invention belongs to the field of slope stability and risk evaluation, and particularly relates to a slope risk comprehensive evaluation method based on a landslide failure form, which comprises the following steps: randomly generating n groups of combined values conforming to statistical characteristics according to the statistical characteristics of cohesive force c and an internal frictionangle, and recording the n groups of combined values as the ith group of combined values to obtain the minimum safety factor Fsi of a slope; analyzing the slip-off distance dRi and the influence distance dIi of the slope under the ith group of combined values by using a smoothed particle hydrodynamics method; making i= i + 1, repeating the previous two steps, and obtaining the minimum safety coefficient, the sliding-out distance and the influence distance of the slope under all the combined values; averaging to obtain an average safety coefficient, slip-off and influence distance; and calculating a normalized slide-out distance and an influence distance according to the positions of the slope crest and slope bottom structures, and comprehensively evaluating the landslide risk together withthe average safety coefficient. The smooth particle hydrodynamic method is introduced, and the slope stability and risk are evaluated more visually and reasonably by using the slip-off distance and the influence distance and combining the classical limit equilibrium method.