| 大型尾水调压室穹顶开挖支护力学与变形特征研究 |
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| 引用本文： | 王克忠,尹宏磊,李仲奎,满志伟.大型尾水调压室穹顶开挖支护力学与变形特征研究[J].岩石力学与工程学报,2014,33(7):1398-1406. |
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| 作者姓名： | 王克忠 尹宏磊 李仲奎 满志伟 |
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| 作者单位： | (1. 浙江工业大学 建筑工程学院，杭州 310014；2. 北京市勘测设计院有限公司，北京 100038；;
3. 清华大学 水沙科学与水利水电工程国家重点实验室，北京 100084) |
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| 基金项目： | 清华大学水沙科学与水利水电工程国家重点实验室开放基金资助项目(sklhse–2014–D–02);浙江省科技厅公益项目(2012C21105);浙江省重点科技创新团队项目(2010R50035) |
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| 摘 要： | 锦屏一级水电站尾水调压室为2个巨型圆筒状竖井，且位于2条大断层及多组节理切割的复杂高应力地质体内，球冠状顶部开挖支护困难。工程应用和理论研究均表明：开挖方式和支护参数是影响尾水调压室穹顶应力分布和变形的关键因素。基于对1#尾水调压室顶拱f14断层及煌斑岩脉，断层影响带的现场勘察研究采用力学分析、原位监测和三维数值模拟等手段，对尾水调压室围岩变形破坏机制进行深入分析，研究尾水调压室开挖过程中穹顶围岩变形和力学特征。最后，对尾水调压室的开挖、支护提出若干有益的建议，为锦屏一级水电站的动态开挖支护设计提供技术支持。
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| 关 键 词： | 水利工程尾水调压室断层穹顶围岩力学与变形特征 |
| 收稿时间： | 2013-10-09 |
MECHANICAL CHARACTERISTICS OF DOMES
OF LARGE SURGE TANK AT TAILRACE DURING CONSTRUCTION |
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| WANG Kezhong,YIN Honglei,LI Zhongkui,MAN Zhiwei.MECHANICAL CHARACTERISTICS OF DOMES
OF LARGE SURGE TANK AT TAILRACE DURING CONSTRUCTION[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(7):1398-1406. |
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| Authors: | WANG Kezhong YIN Honglei LI Zhongkui MAN Zhiwei |
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| Affiliation: | (1. School of Civil Engineering and Architecture，Zhejiang University of Technology，Hangzhou，Zhejiang 310014，China；2. BGI Engineering Consultants Ltd.，Beijing 100038，China；3. State Key Laboratory of Hydrosciences and Engineering，;
Tsinghua University，Beijing 100084，China) |
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| Abstract: | The surge tank at tailrace of Jinping I hydropower station is composed of two vertical cylindrical wells of large-diameter at the location of high stress and complex geological configurations with two large scale faults and multiple sets of joints. It was difficult to cavern out the domes and setup supporting structures at the top of cylindrical wells. Engineering practice and theoretical research show that the methods of excavation and the parameters of supporting are the key factors influencing the stress distribution and deformation at the crest of the dome of the tailrace surge tank. Lamprophyre veins and fault f14 were found to exist above the dome of tailrace surge tank #1 through in-situ investigations. The deformation and failure mechanisms of surrounding rock of the tailrace surge tank are studied through mechanical analysis，in-situ monitoring and 3D numerical simulation. The deformational and mechanical characteristics of the dome rocks during excavation process were studied. Some advices on the excavation and support for the tailrace surge tank are thus presented as the technical supports for its excavation and design of the support. |
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| Keywords: | hydraulic engineering tailrace surge tank fault dome surrounding rock mass mechanical and deformation characteristics |
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