Slope stability analysis based on technology of continuum-discrete coupling

YAN Qiong; WU Shun-chuan; ZHOU Yu; ZHANG Duo; SONG Wei-chao

doi:10.16285/j.rsm.2015.S2.006

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Slope stability analysis based on technology of continuum-discrete coupling

更新时间：2026-06-25

- Slope stability analysis based on technology of continuum-discrete coupling
- Vol. 36, Issue S2, Pages: 47-56(2015)
- 作者机构：
  
  1. 北京科技大学土木与环境工程学院,北京,100083
  2. 北京科技大学金属矿山高效开采与安全教育部重点实验室,北京,100083
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2015.S2.006
  CLC： TU443
- Online First：14 June 2018，
  
  Published：2015
- 稿件说明：
移动端阅览
YAN Qiong, WU Shun-chuan, ZHOU Yu, et al. Slope stability analysis based on technology of continuum-discrete coupling[J]. 2015, 36(S2): 47-56.
DOI：

YAN Qiong, WU Shun-chuan, ZHOU Yu, et al. Slope stability analysis based on technology of continuum-discrete coupling[J]. 2015, 36(S2): 47-56. DOI： 10.16285/j.rsm.2015.S2.006.

摘要

以河北省某露天铁矿边坡为工程背景，采用连续-离散耦合数值分析方法，对典型边坡断面进行分步开挖，结合强度折减法，计算分析坡体的变形规律和受力特征。连续、离散网格区域分别采用有限差分FLAC和颗粒离散元PFC进行建模，着重从连续-离散模型的数据一致性，剪应变增量的形成、发展与局部位移的关系，连续-离散介质受力与位移过程，离散体细观破裂与坡体塑性变形等方面，对边坡稳定性的耦合分析方法进行研究，从宏观和细观角度对边坡的失稳机制进行了较为全面的探索。结果表明：（1）计算过程中坡体应力和位移在连续域和离散域保持了较高的一致性，连续-离散耦合分析方法适用于边坡稳定性研究；（2）作为边坡失稳判据的剪应变增量变化过程主要受岩土体水平位移控制；（3）细观破裂机制可有效表征边坡的宏观塑性变形；（4）土体颗粒接触力链的方向改变是土体位移和变形的驱动因素。

Abstract

In this study

the continuum-discrete coupling method is be used to an open-pit iron mine slope in Hebei province. The deformation and stress characteristics in the typical across-section of the slope excavated in the difference time steps are simulated in combination with the strength reduction method. Continuum and discrete region are analyzed with FLAC and PFC procedures respectively. Emphatically in terms of the data consistency for continuum-discrete models

the relations of shear strain increment formation

development with local displacement

the force and displacement transformation process of continuum and discrete media

meso-crack of discrete media and plastic deformation of slope mass and so on

the applicability of the continuum-discrete coupling method are studied. Based this method

the instability mechanism of the slope is illustrated from macro and micro aspects. The results show that

stress and displacement of slope in the continuum and discrete region maintain a superior consistency in the process of computation

showing the continuum-discrete coupling method is applicable to slope stability analysis; the varition of shear strain increment acting as slope instability criterion is controlled by horizontal displacement of rock or/and soil mass; the meso-crack mechanism can characterize macro plastic deformation effectively; the change of contact force chain direction between soil particles is the driving factor of displacement and deformation of soil mass.

关键词

Keywords

references

Views

820

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Research on deformation failure mechanism and stability of slope rock mass containing multi-weak interlayers

Analytic approach of slope multi-slip surfaces based on local strength reduction method and its application

Discussion on relationship between deformation and stability of soil nailing structure

Three-dimensional stability analysis of slope with weak interlayer

Reliability analysis of slope dynamic stability based on strength reduction FEM

Related Author

ZHANG She-rong

TAN Yao-sheng

WANG Chao

WANG Kuan

LI Xiao-chun

YUAN Wei

BAI Bing

SHI Lu

Related Institution

State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University

State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences

Guangdong Research Institute of Water Resources and Hydropower

The Geotechnical Engineering Technology Center of Guangdong Province

The Emergency Technology Research Centre of Guangdong Province for Public Events

AI问答

⁰