Safety Evaluation Method of Anchored Slope Based on Particle Swarm Optimization and Discrete Element Analysis
A particle swarm algorithm and safety evaluation technology, applied in the field of anchoring slope safety evaluation based on particle swarm algorithm and discrete element analysis, can solve the problem of low efficiency in determining parameters, failure to take into account the creep characteristics of rock mass materials, critical Strain and strain state change and strength deterioration, etc., to achieve the effect of improving accuracy and evaluation efficiency
Active Publication Date: 2022-01-28
CHINA UNIV OF GEOSCIENCES (WUHAN)
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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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[0043] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.
[0044]The embodiment of the present invention provides a method for evaluating the safety of anchored slopes based on particle swarm algorithm and discrete element analysis. At present, the commonly used methods for the design of rock anchorage slopes, such as the technical specification for building slope engineering GB50330-2013 and the technical specification for geotechnical bolt and shotcrete support engineering GB50086-2015, only consider the role of the anchor cable as a uniformly distributed Force, based on the limit equilibrium analysis method for slope anchorage design. Currently commonly used slope evaluation methods such as simple slice method, Bishop method, and Swedish slice method are based on static anal...
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The invention provides a method for evaluating the safety of anchored slopes based on particle swarm algorithm and discrete element analysis, which collects basic data of rock anchored slopes based on on-site survey and instrument monitoring; constructs rock anchored slopes based on discrete element analysis software 3DEC Slope analysis and calculation model; determine the creep constitutive model and creep parameter range according to the rock mass creep test; determine the creep in the rock anchor slope analysis and calculation model based on the particle swarm optimization 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 invention has the beneficial effects of effectively improving the accuracy and evaluation efficiency of safety evaluation of rock anchored slopes, and providing favorable conditions for the evolution mechanism research and dynamic safety evaluation of rock anchored slope landslides.
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...
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IPC IPC(8): E02D17/20E02D5/74G06F30/13G06F30/25G06F30/27G06N3/00
CPCE02D17/20E02D5/74G06F30/13G06F30/27G06F30/25G06N3/006E02D2600/30G06F2119/14
Inventor 夏鹏胡新丽吴爽爽段杭陈浩李岚星刘畅应春业
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)