Stress-damage-seepage coupling analysis of surrounding rock of large-scale underground caverns

ZHANG Wei; XIAO Ming; FAN Guo-bang

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Stress-damage-seepage coupling analysis of surrounding rock of large-scale underground caverns

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- Stress-damage-seepage coupling analysis of surrounding rock of large-scale underground caverns
- Vol. 29, Issue 7, (2008)
- 作者机构：
  
  1. 武汉大学水资源与水电工程科学国家重点实验室,武汉,430072
  2. 广东省水利电力勘测设计研究院,广州,510635
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU452
- Online First：27 July 2013，
  
  Published：2008
- 稿件说明：
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ZHANG Wei, XIAO Ming, FAN Guo-bang. Stress-damage-seepage coupling analysis of surrounding rock of large-scale underground caverns[J]. 2008, 29(7).
DOI：

ZHANG Wei, XIAO Ming, FAN Guo-bang. Stress-damage-seepage coupling analysis of surrounding rock of large-scale underground caverns[J]. 2008, 29(7). DOI：

摘要

以渗透体力来考虑渗流场的力学效应，建立了应力-损伤-渗透系数关系方程来考虑应力和损伤对渗流场的影响，结合岩体结构的三维弹塑性损伤有限元分析，建立了大型地下洞室开挖围岩应力-损伤-渗流耦合的计算模型。该计算模型求解的难度主要体现在岩体材料弹塑性、损伤、渗流自由面边界、渗流溢出边界、应力-损伤-渗流相互影响关系等。提出分步迭代法对以上因素进行归纳后按一定顺序分别进行迭代求解，取得了良好的计算效果。将该方法应用于某水电站大型地下洞室群分析，得出了一系列有意义的结论。

Abstract

Seepage field force is calculated to reflect the force effect of seepage flow field. Relationship equation of stress-damage-seepage is built to consider the effect of stress and damage on seepage flow field. Combined with 3-dimension elastoplastic-damage finite element analysis of rock mass

stress-damage-seepage coupling analysis model of large-scale underground surrounding rock is established. The difficulties of solving the model mainly lay on elastoplasticity of rock material

damage

free surface boundary of seepage flow

escaping surface boundary of seepage flow

interaction of stress-damage-seepage

etc. Considering the difficulties

the sequential iteration method is proposed to solve the difficulties by several sequential iterations; and nice calculation result is obtained. The method is used to analyze the large-scale underground caverns of a hydropower station

and a series of useful conclusion is made.

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Related Institution

State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University

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Key Laboratory of Hydraulic and Water Transport Engineering of Ministry of Education, Chongqing Jiaotong University

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