| 金沙江某水电站引水洞出口边坡稳定性分析 |
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| 引用本文： | 吕金昕,巨能攀,郑达,胡伟.金沙江某水电站引水洞出口边坡稳定性分析[J].地质灾害与环境保护,2010,21(1):58-62. |
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| 作者姓名： | 吕金昕 巨能攀 郑达 胡伟 |
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| 作者单位： | 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. 西南交通大学土木工程学院,成都,610031 |
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| 摘 要： | 金沙江某水电站引水洞出口边坡为千枚岩类软岩边坡,其地质条件复杂、结构面发育。由于边坡特殊的岩体结构及其重要性,其稳定发展趋势便成为工程技术人员关心的主要问题。本文在地质调查的基础上,分析了边坡岩体结构特征,建立边坡地质模型,并采用3D-FLAC模拟边坡-洞室组合开挖后的应力、变形分布特征及破坏区范围。结果表明,洞室开挖主要影响6倍洞径范围内围岩应力分布状态,对边坡整体稳定性影响不大;但边坡开挖会使得坡面产生不同程度的受拉区域,对边坡稳定性影响较大。另外,在此基础上选取典型的边坡进行稳定性分析,分析表明,天然状态下,边坡开挖后局部岩体稳定性较差,存在块体失稳的可能,但整体稳定性较好;暴雨、地震条件下,边坡稳定性较差,边坡顶部岩土体有沿结晶灰岩与千枚岩的地层分界面发生失稳的可能。
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| 关 键 词： | 边坡-洞室组合开挖 破坏模式 数值模拟 稳定性分析 |
ANALYSIS OF SLOPE STABILITY OF THE HYDROPOWER STATION DIVERSION TUNNEL OUTLET AT THE JINSHA RIVER |
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| LU Jin-xin,JU Neng-pan,ZHENG Da,HU Wei.ANALYSIS OF SLOPE STABILITY OF THE HYDROPOWER STATION DIVERSION TUNNEL OUTLET AT THE JINSHA RIVER[J].Journal of Geological Hazards and Environment Preservation,2010,21(1):58-62. |
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| Authors: | LU Jin-xin JU Neng-pan ZHENG Da HU Wei |
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| Institution: | 1.State Key Laboratory of Geohazard Prevention and Geo-Environment Protection,Chengdu University of Technology,Chengdu 610059,China;2.College of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China) |
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| Abstract: | The slope of water diversion tunnel of a hydropower station at the Jinsha rever is of the soft rock phylitte,where the geological conditions were complex and structural surface developed.As the slope of the rock mass structure and its special importance,the stability trend of the slope had became the major problems,which engineering and technical personnel concerned.In this paper,based on the analysis of structural features of rock slope,the authors established the geological model of slope,and simulated the stress and deformation and damage of the slop after excavation chamber using 3D-FLAC.The results showed that the main impact of the stress distribution by underground excavation would be on the range of 6 times of the diameter of the chamber in the surrounding rock,and that there would be little effect on the overall stability of the slope.But slope excavation would make different degrees of tension in the slopes,which would be put greater impact on slope stability. |
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| Keywords: | slope underground excavation numerical simulation analysis on stability |
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