| 锦屏导流洞局部洞段围岩失稳成因及支护研究 |
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| 引用本文： | 张恩宝,张建海,周钟,唐朝阳,王仁坤.锦屏导流洞局部洞段围岩失稳成因及支护研究[J].云南水力发电,2006,22(4):40-44. |
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| 作者姓名： | 张恩宝 张建海 周钟 唐朝阳 王仁坤 |
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| 作者单位： | 1. 四川大学水电学院,四川,成都,610065
2. 中国水电顾问集团成都勘测设计研究院,四川,成都,610072 |
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| 摘 要： | 采用非线性弹塑性有限元法,对锦屏电站左岸导流洞塌方洞段K0 434 m的典型剖面进行了精细模拟,研究了开挖过程中不支护与支护后洞周围岩应力应变分布及变化规律、洞周边变形及洞周塑性破坏区范围的变化,分析了局部洞段围岩失稳的成因,分析结果表明高地应力、洞周层面和裂隙及其特定组合是导致洞周局部不稳定的主要原因,并预测了洞周可能存在的不稳定部位,进而对拟定的加强支护措施的有效性作出了评价,为支护的优化设计提供依据。
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| 关 键 词： | 锦屏电站 左岸导流洞 支护 有限元法 岩体变形 失稳模式 |
| 文章编号： | 1006-3951(2006)04-0040-05 |
| 修稿时间： | 2006年3月31日 |
Study of Unstability and Support of Surrounding Rock in Some Sections of the Jinping River Diversion Tunnel |
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| ZHANG En-bao,ZHANG Jian-hai,ZHOU Zhong,TANG Chao-yang,WANG Ren-kun.Study of Unstability and Support of Surrounding Rock in Some Sections of the Jinping River Diversion Tunnel[J].Yunnan Water Power,2006,22(4):40-44. |
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| Authors: | ZHANG En-bao ZHANG Jian-hai ZHOU Zhong TANG Chao-yang WANG Ren-kun |
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| Abstract: | A typical section(K0 434m) of the left diversion tunnel of the Jinping hydropower project is modeled in detain considering joint distribution using non-linear finite element method.The deformation and stress field during excavation are studied.,and the failure zone developed around the cave is analyzed.It is found that the joint distribution and its orientation proved the basic cause of the failure of the local surrounding rock.By studying the failure profile of the cave,the potential unstable zones are anticipated.Furthermore,the support strengthening methods of the sections are proposed. |
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| Keywords: | Jinping hydropower project left diversion tunnel support finite element method deformation failure-mode |
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