| 西藏某水电站左岸坝肩边坡地震稳定性分析 |
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| 引用本文： | 杨国俊,王亮清,梁烨,何娇.西藏某水电站左岸坝肩边坡地震稳定性分析[J].煤田地质与勘探,2015,43(1):52-57. |
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| 作者姓名： | 杨国俊 王亮清 梁烨 何娇 |
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| 作者单位： | 1. 铁道第三勘察设计院集团有限公司，天津，300251
2. 中国地质大学工程学院,湖北 武汉,430074 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)项目(2011CB710600)；国家自然科学青年基金项目(40702050)；中央高校基本科研业务费专项资金项目 |
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| 摘 要： | 地震作用下岩质高边坡的稳定性历来是边坡稳定性研究中的重点,难度比较大。总结了对地震边坡进行工程地质分析的方法,并结合西藏某拟建水电站所在区工程地质条件,对地震作用下该水电站的边坡的稳定性进行工程地质分析;建立数值模型,采用有限差分程序FLAC 3D对地震作用下该边坡的动力稳定性进行分析。由工程地质分析可知,该边坡在地震作用下整体处于稳定状态;拟静力法计算可知,地震对该边坡的稳定性有一定影响;通过地震动力时程分析可知,地震对边坡顶部和坡面附近的影响较大,因而这些地方危险较大;同时还分析了地震波频率、振幅对稳定性的影响以及断层对地震波传播的影响规律。
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| 关 键 词： | 地震稳定性 工程地质分析 破坏模式 数值模拟 |
| 收稿时间： | 2013-10-10 |
Analysis on the seismic stability of left abutment slope of a hydropower station in Tibet |
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| YANG Guojun,WANG Liangqing,LIANG Ye,HE Jiao.Analysis on the seismic stability of left abutment slope of a hydropower station in Tibet[J].Coal Geology & Exploration,2015,43(1):52-57. |
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| Authors: | YANG Guojun WANG Liangqing LIANG Ye HE Jiao |
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| Abstract: | The stability of rock slope under the effect of earthquake plays a significant role in slope stability study, which is difficult to analyze. The paper, based on the engineering geological conditions in the area where the hydropower station is to be located, analyzed the dynamic stability of the slope in combination with engineering geology analysis. Then a numerical model was built based on real condition, and the analysis of the stability of the slope under earthquake action was conducted with finite difference program FLAC 3D. Through comparison, the results of numerical simulation verified the correctness of the conclusions of engineering geology analysis, and provided evidence for the design and construction of the hydropower station, also provided ideas for the similar slope seismic stability evaluation. |
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| Keywords: | seismic stability engineering geology analysis failure mode numerical simulation |
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