Stability analysis of 1 000 m-deep-buried tunnel under high geostress entironment and its engineering application

SU Li-jun; WENG Jian-liang; LU Wen-bo

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Stability analysis of 1 000 m-deep-buried tunnel under high geostress entironment and its engineering application

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- Stability analysis of 1 000 m-deep-buried tunnel under high geostress entironment and its engineering application
- Vol. 29, Issue S1, (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. 长江水利委员会长江勘测规划设计研究院,武汉,430010
- 作者简介：
- 基金信息：
- DOI：
  CLC： U451
- Online First：15 April 2016，
  
  Published：2008
- 稿件说明：
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SU Li-jun, WENG Jian-liang, LU Wen-bo. Stability analysis of 1 000 m-deep-buried tunnel under high geostress entironment and its engineering application[J]. 2008, 29(S1).
DOI：

SU Li-jun, WENG Jian-liang, LU Wen-bo. Stability analysis of 1 000 m-deep-buried tunnel under high geostress entironment and its engineering application[J]. 2008, 29(S1). DOI：

摘要

在深埋隧洞勘察设计和施工过程中，高地应力的存在，是影响洞室稳定的重要因素。作为南水北调西线隧洞的天然试验工程，引大济湟工程的千米埋深引水隧洞也面临高地应力下硬岩岩爆和软岩塑性变形问题。根据引大济湟工程地勘资料，拟定硬岩和软岩的典型物理力学参数。应用ANSYS有限元分析程序对围岩进行稳定性分析，在重力地应力场和全地应力场下，按线弹性法和弹塑性法计算，分析比较得到了不同埋深条件的硬岩和软岩的变形分布特性、最大拉应力分布特性、最大压应力分布特性及可能岩爆区和塑性变形区分布、剪切破坏区分布。分析成果较好地应用于引大济湟工程实践，同时也反应出施工阶段的跟踪复核的重要性。

Abstract

The high geostress has important influence on deep-buried tunnels during the phases of design and construction. As the natural test project of western route of South to North water transfer project in China

the deep-buried water transfer tunnel of Yindajihuang Project faces the problems of rockburst in hard rock and plastic deformation in soft rock under high geostress. Representative physico-mechanical properties are studied out according to the survey data. ANSYS finite element analysis procedure is applied to the stability analysis of tunnel rock. The distribution characteristics of deformation

the maximum tensile the maximum

stress

possible rockburst area

plastic deformation zone and shear failure zone are studied under different conditions

gravity geostress field

full geostress field

and calculated according to linear elastic method and elastoplastic method. Analysis result is applied to Yindajihuang Project

and the importance of checking in time in the course of construction is pointed out.

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