| 强震条件下谢家店滑坡碎屑流发生机制试验研究 |
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| 引用本文： | 刘玲霞,李向全,周志超,侯新伟,王文中,王振兴.强震条件下谢家店滑坡碎屑流发生机制试验研究[J].水文地质工程地质,2011,38(3):104-109. |
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| 作者姓名： | 刘玲霞 李向全 周志超 侯新伟 王文中 王振兴 |
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| 作者单位： | 中国地质科学院水文地质环境地质研究所; |
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| 基金项目： | 中国地质科学院水文地质环境地质研究所基本科研业务项目 |
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| 摘 要： | 谢家店滑坡是5.12汶川大地震触发的较为典型的高速远程滑坡之一。通过滑坡岩体碎屑动荷载力学试验以及微结构特征分析,初步探讨了强震条件下滑坡碎屑流发生的动力学机制。结果表明:红色正长花岗岩的空隙和裂隙的发育程度均高于黑褐色砂岩;随着应变速率的增加,两种岩石的抗剪强度都有相应增加的趋势,且黑褐色砂岩的强度高于红色正长花岗岩;在加载速率持续增长的情况下,两种试样抗剪断强度拟合直线斜率相同,故强度增长速率相等;汶川地震使两种岩石均达到了其抗剪强度,所以岩体的剪切破坏是导致该滑坡发生的主要原因之一。
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| 关 键 词： | 滑坡碎屑流 应变速率 微结构 谢家店滑坡 |
An experimental study of the initiation mechanism of landslide debris flow under a strong earthquake |
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| LIU Ling-xia,LI Xiang-quan,ZHOU Zhi-chao,HOU Xin-wei,WANG Wen-zhong,Wang Zhen-xing.An experimental study of the initiation mechanism of landslide debris flow under a strong earthquake[J].Hydrogeology and Engineering Geology,2011,38(3):104-109. |
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| Authors: | LIU Ling-xia LI Xiang-quan ZHOU Zhi-chao HOU Xin-wei WANG Wen-zhong Wang Zhen-xing |
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| Affiliation: | Institute of Hydrogeology and Environment Geology,CAGS,Zhengding 050803,China |
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| Abstract: | The Xiejiadian landslide,a typical landslide located in Longmen County,was triggered by the 2008 Wenchuan earthquake with high speed and long run-out.A preliminary study of the dynamic mechanics of landslide debris under strong earthquake by landslide debris rock dynamic load mechanics tests and analyses of micro-structural features were carried out.The results show that the red syenogranite is a long gap and the degree of development of fractures in the rock is higher than that in the black-brown sandstone... |
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| Keywords: | landslide debris flow strain rate microstructure Xiejiadian landslide |
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