Safety Evaluation Method of Anchored Slope Based on Genetic Algorithm and Discrete Element Analysis

Abstract

The invention provides a method for evaluating the safety of an anchored slope based on a genetic algorithm and a discrete element analysis method, which mainly includes the following steps: collecting basic data of rock anchored slopes based on field investigation and instrument monitoring; based on discrete element analysis software 3DEC Construct the rock anchored slope analysis and calculation model; determine the creep constitutive model and creep parameter range according to the rock mass creep test; determine the rock anchored slope creep based on the genetic algorithm and the response of the rock anchored slope analysis and calculation model The optimal parameters of the constitutive model; based on the set analysis time, the characteristic variables of the rock-anchored slope are extracted. According to the change of characteristic variables, the long-term safety evaluation of rock anchored slope is carried out. The beneficial effect of the invention is that the accuracy and evaluation efficiency of safety evaluation of rock anchored slopes can be effectively improved, and the method can provide favorable conditions for the evolution mechanism research and dynamic safety evaluation of rock anchored slope landslides.

Description

Technical field [0001] The present invention relates to the field of geological disaster prevention, particularly to dynamic evaluation method of long-term safety of rock mass anchored slope station, in particular to a safety assessment of the genetic algorithm and anchored slope Discrete Element Analysis Method. Background technique [0002] Since a series of national hydropower development planning and implementation, in southwest China to build a large number of water conservancy and hydropower project, with the construction and operation of these projects, carried out a lot of the high side slope rock anchoring structure as Engineering Slope one of the most commonly used means to be a large number of applications. Thus creating a large number of rock slope anchor, long-term safety of these slopes not only the operation of the entire hydropower project, but also a serious bearing on the lives and property of the people in the reservoir area. In the most commonly used specifica...

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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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