| 汶川地震区东河口滑坡破坏机制FLAC模拟分析 |
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| 引用本文： | 孙萍,殷跃平,陈立伟.汶川地震区东河口滑坡破坏机制FLAC模拟分析[J].水文地质工程地质,2011,38(5):87-91. |
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| 作者姓名： | 孙萍 殷跃平 陈立伟 |
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| 作者单位： | 国土资源部新构造运动与地质灾害重点实验室;中国地质科学院地质力学研究所;中国地质调查局;中国核电工程有限公司; |
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| 基金项目： | 国家自然科学基金项目(40802067); 973计划资助项目(2008CB425803); 中国地质调查局项目(1212010914025) |
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| 摘 要： | 以汶川地震触发的东河口滑坡为典型案例,根据野外调查结果建立震前地质模型,将实测的汶川地震波作为动力输入,采用FLAC有限差分法对该滑坡分别进行了静力稳定性分析及动力稳定性分析。计算结果表明:竖向峰值加速度导致了边坡的稳定性系数大幅降低,对边坡的破坏起着不可忽视的作用;另外,竖向峰值加速度引起了边坡后缘大面积的拉张破坏,这正是汶川地震引起西南山区产生大量崩滑甚至岩土体"抛掷"现象的一个重要因素。
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| 关 键 词： | 汶川地震 滑坡 竖向峰值加速度 破坏机制 FLAC |
Numerical analysis of the failure mechanism of the Donghekou rockslide in the Wenchuan earthquake region with FLAC |
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| SUN Ping
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YIN Yue-ping
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CHEN Li-wei.Numerical analysis of the failure mechanism of the Donghekou rockslide in the Wenchuan earthquake region with FLAC[J].Hydrogeology and Engineering Geology,2011,38(5):87-91. |
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| Authors: | SUN Ping YIN Yue-ping CHEN Li-wei |
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| Institution: | SUN Ping1,2,YIN Yue-ping3,CHEN Li-wei4(1.Key Laboratory of Neotectonic Movement & Geohazard,Ministry of Land and Resources,Beijing 100081,China,2.Institute of Geomechanics,Chinese Academy of Geological Sciences,3.China Geological Survey,Beijing 100037,4.China Nuclear Power Engineering Corporation,Ltd.,Beijing 100840,China) |
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| Abstract: | Taking the Donghekou rockslide triggered by the Wenchuan earthquake as a case study,the geological model before the earthquake was established based on field investigation.Using the real seismic wave on May 12,2008,the static and dynamic stability analysis of the Donghekou rockslide was carried out with the software FLAC.The results show that the vertical peak acceleration had led to significant reduction in the slope stability factors,as a result,it played an important role in the slope failure.In addition... |
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| Keywords: | Wenchuan earthquake rockslide vertical peak acceleration failure mechanism FLAC |
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