Mechanical parameters estimation and tunnel deformation study for brittle rock under high overburden condition

HSIAO Fu-yuan; WANG Chien-li; SHAO How-jei

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Mechanical parameters estimation and tunnel deformation study for brittle rock under high overburden condition

更新时间：2026-06-25

- Mechanical parameters estimation and tunnel deformation study for brittle rock under high overburden condition
- Vol. 32, Issue S2, (2011)
- 作者机构：
  
  1. 中兴工程顾问社大地工程研究中心,台湾,台北,11071
  2. 成功大学资源工程系,台湾,台南,70101
  3. 公路总局苏花公路改善工程处，台湾宜兰,27050
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU443
- Online First：26 August 2011，
  
  Published：2011
- 稿件说明：
移动端阅览
HSIAO Fu-yuan, WANG Chien-li, SHAO How-jei. Mechanical parameters estimation and tunnel deformation study for brittle rock under high overburden condition[J]. 2011, 32(S2).
DOI：

HSIAO Fu-yuan, WANG Chien-li, SHAO How-jei. Mechanical parameters estimation and tunnel deformation study for brittle rock under high overburden condition[J]. 2011, 32(S2). DOI：

摘要

隧道工程开挖深度有逐渐增加的趋势，深部岩石具高强度及高应力环境。虽然脆性岩石在高围压应力下，将转而呈现延性特性，但隧道开挖所产生的径向解压，使隧道周边一定范围内的岩体处在低围压状态，故这部分围岩的变形仍由脆性性质所掌控。对于脆性岩石呈现峰后强度弱化特性，文中汇整各种岩石峰后强度弱化参数评估方法后，提出结合Hoek-Brown准则与岩心试验的强度损失试验评估法。以实际工程案例分析结果显示，600 m埋深时岩石峰后强度弱化与否，对隧道围岩变形量影响不大，但隧道埋深超过2 000 m后，变形量的差异将达到3～4倍左右，显示脆性岩石峰后强度弱化特性，对深埋隧道施工变形影响不可忽视。

Abstract

The Overburden of tunnel construction is increasing recently. Rocks in the depths have high strength and high stress condition. With increasing confinement pressure

brittle rock will become more and more ductile and eventually behave like an ideally plastic medium. However

radial pressure of tunnel is rapidly reduced during excavation. The rock masses surrounding the tunnel are actually in low confinement condition. Tunnel deformation is mainly dominated by rock’s brittle properties. Brittle rock exhibits a progressive loss of strength when they are compressed beyond failure. After reviews of various parameter estimation methods of post-peak strength

the strength loss experiment method

which combines Hoek-Brown failure criterion with rock core experiment

is proposed. According to an actual case analysis

the tunnel deformation at 600 m overburden is about the same whether the post-peak strength degradation occurred or not. Nevertheless

the tunnel deformation has an obvious difference when the overburden exceeds 2 000 m. The difference of deformation is expected 3-4 times. The strength degradation of brittle rock beyond failure; therefore

it plays an important role in deep tunnel deformation.

关键词

Keywords

references

Views

2316

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Particle flow simulation of fracture characteristics and crack propagation mechanism of holed-cracked Brazilian disc specimen

Experimental research on time-dependent behavior of crack propagation in Jinping deep marble

Preliminary study of two-scale model for analyzing brittle rock based on asymptotic expansion method

The numerical simulation to model fallure of brittle rock with prefab crack

Two problems of numerical simulation of brittle rock failure

Related Author

YANG Sheng-qi

HUANG Yan-hua

CHU Wei-jiang

ZHANG Chun-sheng

LIU Ning

PENG Cong-wen

ZHU Xiang-rong

WANG Jin-chang

Related Institution

Key Laboratory of Geotechnical and Structural Engineering Safety of Hubei Province, Wuhan University

State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology

Hydro China Huadong Engineering Corporation

Research Institute of Transportation Engineering, Zhejiang University

Ningbo Institute of Technology, Zhejiang University

AI问答

⁰