Thermal effect of brittle failure for granite tunnel

CHEN Guo-qing; LI Tian-bin; ZHANG Yan; FU Kai-long; WANG Dong

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Thermal effect of brittle failure for granite tunnel

更新时间：2026-06-25

- Thermal effect of brittle failure for granite tunnel
- Vol. 34, Issue 12, (2013)
- 作者机构：
  
  1. 成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都,610059
  2. 中铁二院工程集团有限责任公司,成都,610031
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU452
- Online First：19 December 2013，
  
  Published：2013
- 稿件说明：
移动端阅览
CHEN Guo-qing, LI Tian-bin, ZHANG Yan, et al. Thermal effect of brittle failure for granite tunnel[J]. 2013, 34(12).
DOI：

CHEN Guo-qing, LI Tian-bin, ZHANG Yan, et al. Thermal effect of brittle failure for granite tunnel[J]. 2013, 34(12). DOI：

摘要

目前深埋硬岩隧道的岩爆等脆性破坏研究还较少考虑到温度的作用效应。采用精细网格数值模型，提出热-脆性-精细力学计算方法，应用能反映高地应力下硬岩脆性破坏特点的岩体劣化模型，结合能量计算指标，开展了不同温度作用下隧道硬岩脆性破坏的热力耦合分析。以瑞典APSE花岗岩隧洞岩柱为例，进行不同地温下隧道破坏区、能量释放值和应力指标的定量化对比研究。研究结果表明，隧道地温的增加将使岩体产生附加温度应力，进而增大其脆性破坏程度，计算结果与隧道现场的破坏规律基本一致。热-脆性-精细力学计算能合理描述硬岩的损伤和渐进破坏过程，计算结果较好地揭示了花岗岩等硬岩深埋隧道脆性破坏的温度作用效应，对于高应力、高地温下深部工程的稳定性评价具有指导意义。

Abstract

Thermal effect of brittle failure for hard rock tunnel under high geostress and high ground temperature need to be studied urgently; and the calculation analysis related to brittle failure rarely considers thermal effect. Based on the method of thermal-brittle-fine mechanical calculation

the thermal effect of excavation unloading for hard rock tunnel is calculated by using a new constitutive model reflecting the brittle failure of hard rock; and the energy release rate index is also analyzed. Taking the rock pillars of APSE tunnel in Sweden for example

the mechanical response of tunnel excavation is analyzed under different ground temperatures. Then the damage degree of surrounding rock is analyzed under the action of temperature loading. The failure zone

energy release value and stress index are compared under different ground temperatures. The result shows that increased temperature will strengthen the brittle failure because temperature will make rock mass to generate additional thermal stress. The method of thermal-brittle-fine mechanical calculation can reasonably describe the progressive failure process of hard rock. The proposed method reveals the thermal effect of brittle failure for deep hard rock tunnel

and could benefit the stability evaluation for deep hard rock tunnel under high ground temperature.

关键词

Keywords

references

Views

1645

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Analysis of wave velocity characteristics of critical rock brittle failure

Simulation of opening displacement of brittle rockmass at point of energy dissipation

Estimation of in situ geostress states from measuring shape of disked core

Research on floor heave characteristics of broken soft rocks with high geostress and its comprehensive control measures

Anti-erosion mechanisms of microbially induced calcium carbonate precipitation-vegetation synergistic slope protection

Related Author

HU Fan

XUE Lei

SUN Qiang

WANG Yuan-yuan

ZHUANG Yan

CHEN Wei-zhong

CHEN Pei-shuai

LIU De-jun

Related Institution

Key Laboratory of Engineering Geomechanics, Institute of Geology and Geophysics, Chinese Academy of Sciences

School of Resources and Earth Science, China University of Mining and Technology

Center for Earth Observation and Digital Earth, Chinese Academy of Sciences

Bridge and Tunnel Engineering Division , the 1st Survey and Design Institute of China Railways

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

AI问答

⁰