| 某水电站坝前左岸古滑坡成因机制分析 |
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| 引用本文： | 廖锦,张进林.某水电站坝前左岸古滑坡成因机制分析[J].四川地质学报,2009,29(2):191-194. |
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| 作者姓名： | 廖锦 张进林 |
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| 作者单位： | 1. 四川省蜀通岩土工程公司,成都,610041
2. 四川省蜀通岩土工程公司,成都,610041;成都理工大学环境与土木工程学院,成都,610059 |
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| 摘 要： | 古滑坡坐落于Ⅱ级阶地台面上，堆积物最大厚度可达50m余。利用FLAC^3D数值模拟得到的滑面在前缘位于基覆界面附近，与野外调查的结果一致。结合雅砻江河谷演化历史，从斜坡演化机制、边坡岩体的变形破坏模式，分析了古滑坡成因机制。研究表明：雅砻江快速下切使岸坡岩体浅表改造程度较为剧烈，不断增加的重力堆积静荷载与崩塌形成的瞬时冲击荷载加速了岩体的弯曲一拉裂变形进程，造成Ⅱ级阶地基座岩体发生突发性折断破坏．从而导致古滑坡失稳。
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| 关 键 词： | 古滑坡 河谷演化历史 成因机制 |
Genetic Mechanism for the Old Landslide in Left Front of a Certain Hydroelectric Station Dam |
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| LIAO Jin,ZHANG Jin-lin.Genetic Mechanism for the Old Landslide in Left Front of a Certain Hydroelectric Station Dam[J].Acta Geologica Sichuan,2009,29(2):191-194. |
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| Authors: | LIAO Jin ZHANG Jin-lin |
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| Institution: | 1-Sichuan Shutong Geotechnical Ingineering Company;Chengdu 610041;2-College of Environment and Civil Engineering;Chengdu University of Technology;Chengdu;610059 |
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| Abstract: | Based on the detailed field observation,the old landslide is located atop the second river terrace with more than 50 m thick accretion in a valley.The surface of rupture computed by FLAC3D lies between overburden layer and bedrock which consists with field investigation.From the evolutionary history of the Yalong River valley it is concluded that speeding trenching is responsible for failure of the old landslide |
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| Keywords: | old landslide valley evolutionary history genetic mechanism |
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