Slope risk comprehensive evaluation method based on landslide failure form

Abstract

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.

Description

technical field [0001] The invention belongs to the field of slope stability and risk assessment, in particular to a slope risk comprehensive assessment method based on landslide damage patterns. Background technique [0002] The current main method for slope stability analysis is still the limit equilibrium method, which is based on static equilibrium conditions to calculate the critical sliding surface and the minimum safety factor when the slope starts to slide. For the quantitative evaluation of landslide risk, more attention should be paid to the sliding process of slope collapse and the final soil deposition stage. This kind of landslide process analysis limit equilibrium method cannot be done. [0003] The slope risk assessment index based on the limit equilibrium method is mainly based on the earth volume of the landslide, and for some slopes with complex failure modes, the calculated earth volume is also inaccurate, and the actual meaning of the earth volume index i...

AI Technical Summary

Problems solved by technology

For the quantitative evaluation of landslide risk, more attention should be paid to the sliding process of slope collapse and the final soil deposition stage. This kind of landslide process analysis limit equilibrium method cannot be done.

[0003] The slope risk assessment index based on the limit equilibrium method is mainly based on the earth volume of the landslide, and for some slopes with complex failure modes, the calculated earth volume is also inaccurate, and the actual meaning of the earth volume index is not great

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