Comprehensive evaluation method for slope stability and safety level

A technology of safety level and slope, applied in the direction of instruments, electrical digital data processing, calculation models, etc., can solve problems such as difficulty in assessing the stability of slopes

Pending Publication Date: 2020-07-10
HOHAI UNIV
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Therefore, the slope stability problem is a typical nonlinear problem, and there is a high degree of nonlinearity an...

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  • Comprehensive evaluation method for slope stability and safety level
  • Comprehensive evaluation method for slope stability and safety level
  • Comprehensive evaluation method for slope stability and safety level

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Embodiment Construction

[0057] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0058] Now take a certain actual high slope as an engineering example, apply a comprehensive evaluation method of slope stability and safety level proposed by the present invention to evaluate the slope stability level, and the index data used during the period are expressed in tables, combined with figure 1 , the specific steps include the following:

[0059] S1: Selection of evaluation indicators and normalization of indicators

[0060] The control variables that affect the slope stability are mainly divided into two categories, the physical and mechanical properties of rock and soil, and the geometry of the slope. Physical and mechanical property indicators include: rock mass deformation modulus, rock quality index, cohesion, internal friction angle and rock integrity coefficient; indicators controlling slope geometric parameters include: s...

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Abstract

The invention discloses a comprehensive evaluation method for slope stability and safety level. The method comprises the following steps: (1) collecting sample indexes influencing slope stability; (2)normalizing the collected sample indexes; (3) determining slope safety grade division and index grade standards; (4) establishing a stability evaluation PP model; and (5) determining a slope stability grade. Chaos optimization and particle swarm optimization are combined, the optimal projection direction of an evaluation index is optimally searched, chaos disturbance is generated for evolution-stopped particles by means of the characteristics of chaos variables in optimization, a solution jumps out of a local extremum region, and meanwhile, the search precision and the algorithm efficiency are improved by using self-adaptive adjustment inertia weight. A projection value interval range corresponding to each grade of the slope is solved by utilizing the solved optimal projection direction and the normalized interval upper and lower limit values of the indexes corresponding to each grade, and the stability grade of the to-be-evaluated slope is determined by comparing and searching the slope grade corresponding to the interval where the projection value of the to-be-evaluated slope is located.

Description

technical field [0001] The present invention relates to slope stability evaluation, in particular to a comprehensive evaluation method for slope stability and safety level Background technique [0002] The stability of slope is affected by many factors such as geology, construction, rainfall and surrounding environment, and has the characteristics of ambiguity, randomness, uncertainty and variability. Therefore, the slope stability problem is a typical nonlinear problem, and there is a high degree of nonlinearity and complexity between it and its influencing factors. Difficulty has always been a major problem in the engineering world. Contents of the invention [0003] Purpose of the invention: Aiming at the defects of the existing evaluation methods, find the best projection direction of the evaluation index, combine chaos optimization and particle swarm optimization, and use the characteristics of chaotic variables to generate chaos for particles that stop evolution dur...

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Application Information

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IPC IPC(8): G06F30/10G06F119/14G06N3/00
CPCG06N3/006
Inventor 梁桂兰张国伟陈高徐卫亚王震吴玲莉
Owner HOHAI UNIV
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