Anchoring slope safety evaluation method based on particle swarm optimization and discrete element analysis

Abstract

The invention provides an anchoring slope safety evaluation method based on a particle swarm optimization and a discrete element analysis. The anchoring slope safety evaluation method based on the particle swarm optimization and the discrete element analysis comprises the following steps of collecting basic data of a rock anchoring slope based on field investigation and instrument monitoring; constructing a rock anchoring slope analysis and calculation model based on a discrete element analysis software 3DEC; determining a creep constitutive model and a creep parameter range according to a rock mass creep test; determining the optimal parameters of the creep constitutive model in the rock anchoring slope analysis and calculation model based on the particle swarm optimization and the response of the rock anchoring slope analysis and calculation model; and extracting characteristic variables of the rock anchoring slope based on the set analysis time. Performing long-term safety evaluation on the rock anchoring slope according to the change condition of the characteristic variables. The anchoring slope safety evaluation method based on the particle swarm optimization and the discrete element analysis has the beneficial effects that the accuracy and the evaluation efficiency of safety evaluation of the rock anchoring slope are effectively improved, and favorable conditions are provided for evolution mechanism research and dynamic safety evaluation of landslide of the rock anchoring slope.

Description

technical field [0001] The invention relates to the field of geological disaster prevention and control, in particular to a method for evaluating the dynamic long-term safety of rock anchored slopes in hydropower stations, and in particular to a method for evaluating the safety of anchored slopes based on particle swarm algorithm and discrete element analysis. Background technique [0002] Since the implementation of a series of national hydropower development plans, a large number of water conservancy and hydropower projects have been built in Southwest my country. With the construction and operation of these projects, a large number of high rock slope treatment projects have been carried out. One of the most commonly used means is heavily applied. Therefore, a large number of rock-anchored slopes are formed. The long-term safety of these slopes is not only related to the operation of the entire hydropower project, but also seriously related to the life and property safety o...

AI Technical Summary

Problems solved by technology

However, most of the current analyzes use the Mohr model, which fails to take into account the critical strain strain state change and strength degradation caused by the creep characteristics of rock mass materials; at the same time, the selection of creep parameters is also determined by trial calculations and experiments. There is still a certain difference between the response of the analysis and calculation model of the rock anchorage slope and the actual monitoring data

These two deficiencies have led to deviations in the current research on the evolution mechanism and long-term safety evaluation of rock-anchored slopes.

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