A safety assessment method for accumulation landslides based on blind information

Abstract

The present invention discloses a blind information based talus slide safety evaluation method. The method comprises the steps of: defining cohesion and an internal friction angle as blind information parameters for talus slide safety evaluation; selecting sliding zone soil samples to carry out a direct shear test, obtaining blind information data of each sample, and by data processing, respectively obtaining a preliminary expression of cohesion blind information A and internal friction angle information B; using a trapezoidal fuzzy number to simulate and characterize blind information, using an alfa cut technique to carry out quantitative processing on the trapezoidal fuzzy number, and respectively obtaining a final expression of the cohesion blind information A and the internal friction angle information B; by using a rigid body limit equilibrium method, constructing a blind information model of talus slide safety evaluation, and obtaining an expression C=A*B of safety factor blind information C; and according to the expression of the safety factor blind information C, carrying out evaluation on talus slide safety. The method disclosed by the present invention combines a blind information theory and the rigid body limit equilibrium method, and can provide more comprehensive unstable landslide information for engineering and technical personnel.

Description

technical field [0001] The invention relates to a safety evaluation method for accumulation body landslides, in particular to a safety evaluation method for accumulation body landslides based on blind information. Background technique [0002] There are a large number of accumulation landslides distributed in the mountains and valleys of southwest my country and around the world. Such landslides frequently occur in human or natural activities, causing serious harm to economic construction and people's normal life. Safety evaluation of accumulation landslides is of great significance. [0003] As a multi-component medium, the accumulation body is generally composed of crushed stones, block stones, clay, sand and other filling components as aggregates. Its mechanical properties are complex, and its structure has strong inhomogeneity and randomness. Compared with homogeneous slopes, the uncertainty of mechanical parameters of accumulation landslides has a particularly prominent...

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Problems solved by technology

[0004] Aiming at the above-mentioned problems existing in the prior art, the present invention proposes a new safety evaluation method for accumulation body landslides, which can make up for the defects of traditional deterministic methods and provide engineering and technical personnel with more comprehensive landslide instability information

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