高地应力洞室围岩变形破坏规律研究

详细信息    查看全文 | 推荐本文 |

英文篇名：Deformation and failure laws of underground cavern rock mass in high ground stress 作者：杨静熙 ; 陈长江 ; 刘忠绪 英文作者：YANG Jingxi;CHEN Changjiang;LIU Zhongxu;Power China Chengdu Engineering Corporation Limited; 关键词：地下洞室 ; 高地应力 ; 洞室轴线方向 ; 围岩变形破坏 ; 锦屏一级水电站 英文关键词：underground cavern;;high ground stress;;axial direction of underground cavern;;deformation and failure of sur rounding rock;;Jinping-I Hydropower Station 中文刊名：RIVE 英文刊名：Yangtze River 机构：中国电建集团成都勘测设计研究院有限公司; 出版日期：2016-03-28 出版单位：人民长江 年：2016 期：v.47;No.583 语种：中文; 页：RIVE201606008 页数：5 CN：06 ISSN：42-1202/TV 分类号：41-45

摘要

锦屏一级水电站右岸地下厂房地质条件复杂,地应力高,对围岩稳定造成较大不利影响。统计分析了厂区地下洞室群施工期的围岩变形破坏现象,归纳出高地应力条件下地应力方向、洞室轴线方向对围岩变形破坏的影响规律。研究表明,高应力条件下洞室群围岩破坏程度除了受最大主应力控制,还与洞室规模密切相关;而且高地应力引起的围岩破坏在时间上有滞后性,需研究实施支护的合适时机。上述结论为地下洞室后续合理施工及支护提供了理论依据,也可为高地应力区洞室轴线布置和围岩变形破坏预防提供参考。
        The right bank underground powerhouse area of Jinping- I Hydropower Station is characterized by complex geological conditions and high ground stress,causing a great adverse impact on the stability of surrounding rock. We analyzed the deformation and failure of surrounding rock of underground cavern in the construction stage systematically,and the influence of stress direction and axial direction of underground cavern on the deformation and failure of surrounding rock was summarized. The results show that the failure degree of surrounding rock has a close relation with cavern's scale besides the principal stress,also the failure of surrounding rock caused by high ground stress has a feature of time- lag,so the time of conducting supporting construction is needed to study. The research results provided theoretical basis for the reasonable construction and support of the underground cavern,and could provide reference for axial layout of underground cavern and prevention of the deformation and failure of surrounding rock under high ground stress.

引文

[1]陈长江,刘忠绪,孙云.锦屏一级水电站地下厂房施工期下游拱腰部位的裂缝成因分析[J].水电站设计,2011,27(3):87-89.
    [2]卢波,王继敏,段绍辉,等.锦屏一级水电站地下厂房围岩开裂变形机制研究[J].岩石力学与工程学报,2010,29(12):2429-2441.
    [3]侯东奇,廖成刚,幸享林,等.锦屏一级水电站地下厂房下游拱围岩变形开裂破坏成因分析与加固措施研究[J].水力发电学报,2012,31(5):230-235.
    [4]衣晓强,伍法权,熊峥.锦屏一级水电站地下厂区破坏成因分析[J].工程地质学报,2010,18(2):267-272.
    [5]谢国权,孙文良.锦屏一级水电站地下厂房围岩松弛变形机理分析与治理[J].水利水电技术,2010,41(2):17-21.
    [6]张勇,肖平西,丁秀丽,等.高地应力条件下地下厂房洞室群围岩的变形破坏特征及对策研究[J].岩石力学与工程学报,2012,31(2):228-244.
    [7]周钟,巩满福,汤雪峰,等.四川省雅砻江锦屏一级水电站地下厂房洞室群围岩变形破坏机制及加固措施研究专题报告[R].成都:中国水电工程顾问集团成都勘测设计研究院,2009.
    [8]黄润秋,黄达,段绍辉,等.锦屏I级水电站地下厂房施工期围岩变形开裂特征及地质力学机制研究[J].岩石力学与工程学报,2011,30(1):23-35.
    [9]魏进兵,邓建辉,王俤剀,等.锦屏一级水电站地下厂房围岩变形与变形破坏特征分析[J].岩石力学与工程学报,2010,29(6):1198-1205.
    [10]程丽娟,李仲奎,郭凯,等.锦屏一级水电站地下厂房洞室群围岩时效变形研究[J].岩石力学与工程学报,2011,30(增1):3081-3088.