Unloading strain characteristic experiments on marble of diversion tunnel of Jinping Hydropower Station

QIN Yu-chun; ZHU Zhen-de; WANG Zhan-peng

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Unloading strain characteristic experiments on marble of diversion tunnel of Jinping Hydropower Station

更新时间：2026-06-25

- Unloading strain characteristic experiments on marble of diversion tunnel of Jinping Hydropower Station
- Vol. 27, Issue S1, (2006)
- 作者机构：
  
  1. 河海大学岩土工程研究所,江苏,南京,210098
  2. 深圳市岩土工程公司,广东,深圳,518028
- 作者简介：
- 基金信息：
- DOI：
  CLC： TV233.1
- Online First：15 December 2006，
  
  Published：2006
- 稿件说明：
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QIN Yu-chun, ZHU Zhen-de, WANG Zhan-peng. Unloading strain characteristic experiments on marble of diversion tunnel of Jinping Hydropower Station[J]. 2006, 27(S1).
DOI：

QIN Yu-chun, ZHU Zhen-de, WANG Zhan-peng. Unloading strain characteristic experiments on marble of diversion tunnel of Jinping Hydropower Station[J]. 2006, 27(S1). DOI：

摘要

锦屏水电站属于国家重大工程。其引水隧洞洞线长、洞径大、埋深大，围岩岩性组合复杂，断裂构造发育，特别是该区为高地应力区。隧洞的开挖过程，就是围岩的卸荷过程。通过对大理岩在保持轴向应力不变的条件下的卸围压试验的分析，讨论了卸围压时围压与弹性模量、泊松比、轴向应变的关系，得出了卸围压时大理岩的轴向变形呈非线性特性的结论。

Abstract

The Jinping Hydropower Station is a national important large-scale project. The tunnel of the project is very long and has a big diameter; and it is buried very deep. Its wall rocks are very complex in tectonic geology; and the faulted structure is very developed

especially this area is a high ground stress area. The process of excavation is the process of unloading for wall rocks. Through analyzing the confining pressure unloading experiments on marble with constant axial load

we discuss the relationships between elastic modulus

Poisson’s ratio

axial strain and confining pressure; and a conclusion that the axial strain of marble is nonlinear when confining pressure was unloading

is drawn.

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Related Institution

Central Research Institute of Building & Consturction MMI

Department of Geotechnical Engineering, China Institute of Water Resources and Hydropower Research

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College of Resources and Safety Engineering, China University of Mining & Technology (Beijing)

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

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