Discrete element method-finite element method combined analysis method for talus retaining structure

A technology of retaining structure and finite element method, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of low accuracy in analyzing the stability of rock pile retaining structures

Inactive Publication Date: 2018-03-20
TSINGHUA UNIV +1
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Problems solved by technology

[0004] The problem to be solved by the present invention is to provide a rock pile support structure analysis method based on the discrete element method combined with the finite element method, so as to solve the problem that the existing single analysis method is not accurate in analyzing the stability of the rock pile support structure

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  • Discrete element method-finite element method combined analysis method for talus retaining structure
  • Discrete element method-finite element method combined analysis method for talus retaining structure
  • Discrete element method-finite element method combined analysis method for talus retaining structure

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Embodiment Construction

[0015] Attached below Figure 1-3 The embodiment of the method of the present invention is described in detail.

[0016] control figure 1 , the specific implementation process of the present invention is as follows:

[0017] Step 1: The inclination angle of the bedrock of a certain slope is about 40°, the thickness of the rock pile at the upper part of the slope is about 5-7m, and the horizontal distance of the rock pile is about 45m. Distribution, considering the cohesive force of 60-120kPa and the internal friction angle of 25-30° in the rock pile, the micro-pile retaining wall is used to support the front of the rock pile, with a height of about 7.8m.

[0018] Step 2: Using discrete element program PFC 2D According to the actual project to establish the discrete element model such as figure 2 As shown, EF is inclined bedrock, AF is micropile retaining wall, yellow particles are rock piles, and ABCDE is the outline of rock piles. The material parameters are: the partic...

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Abstract

The invention discloses a discrete element method-finite element method combined analysis method for a talus retaining structure. The combined analysis method comprises the steps of firstly carrying out field investigation so as to determine the particle size of a talus, establishing a discrete element program PFC2D numerical model according to practical engineering, calculating a soil pressure, inputting a soil pressure result calculated by virtue of the discrete element program PFC2D numerical model into a finite element model, and carrying out stability analysis on the talus retaining structure. A discrete element has relatively strong advantages in the aspect of calculating the soil pressure of a macadam accumulation body, and the soil pressure result is used as a load boundary condition of a finite element model for carrying out stability analysis on the talus retaining structure, so that the advantages of both sides can be exerted, and a novel solution is provided for engineeringproblems.

Description

technical field [0001] The invention relates to an analysis method for a rock pile support structure, in particular to an analysis method for a rock pile support structure using a discrete element method combined with a finite element method. Background technique [0002] At present, the limit equilibrium method or finite element method is usually used in the analysis of rock pile retaining structure, but the rock pile is usually formed by the accumulation of several rock fragments, which does not meet the basic assumption of continuous medium. The classic limit equilibrium method and finite element method How to analyze the stability of the rock pile retaining structure is a problem that needs to be solved in geotechnical engineering. [0003] In the present invention, taking micro-pile retaining wall as an example, the combined calculation and analysis of discrete element and finite element are carried out, and the feasibility of collaborative calculation by different meth...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 宋二祥徐明沈志平王蕴佳孔郁斐付君宜
Owner TSINGHUA UNIV
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