| 甘肃省东乡县特大滑坡地质灾害形成机制与治理方法 |
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| 引用本文： | 李 松,张 川.甘肃省东乡县特大滑坡地质灾害形成机制与治理方法[J].甘肃地质学报,2013,22(1):65-70. |
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| 作者姓名： | 李 松 张 川 |
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| 作者单位： | 甘肃省地矿局水文地质工程地质勘察院;甘肃地质工程勘察院 |
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| 基金项目： | 甘肃省国土资源厅“甘肃省舟曲县地质灾害二期治理工程施工项目”资助 |
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| 摘 要： | 以野外实际调查资料为依据,总结分析甘肃陇西黄土高原滑坡类型及特征的基础上,从降水(主要指强降雨)改变地形地貌、改变滑坡土的成分构成、改变滑坡的土体结构、改变滑坡的力学强度4个方面阐述了大气降水对黄土滑坡形成的机理。大气降水对黄土滑坡的时空分布存在着较大影响和控制,年际上,同一区域滑坡发生的频次与多年降水的强弱过程呈现良好的相关性,存在丰水年滑坡次数多、规模大而枯水年滑坡次数少、规模小的规律;年内滑坡集中出现于3月份和6～9月份,前者是季节性冻结—融化作用所致,后者是降水在时间上的集中决定了滑坡发生时间的集中性;不同区域,在地形地貌、地层岩性基本相同和植被覆盖率相差不大的条件下,降水量越大,滑坡发生频率越高,反之,亦然。
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| 关 键 词： | 滑坡 特征 强降雨 机理 黄土高原 甘肃陇西 |
THE IMPACT AND CONTROL OF ATMOSPHERIC PRECIPITATION ON THE FORMATION OF LOESS LANDSLIDES——An example of Longxi Loess Plateau in Gansu Province |
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| LI Song and ZHANG Chuan.THE IMPACT AND CONTROL OF ATMOSPHERIC PRECIPITATION ON THE FORMATION OF LOESS LANDSLIDES——An example of Longxi Loess Plateau in Gansu Province[J].Acta Geologica Gansu,2013,22(1):65-70. |
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| Authors: | LI Song and ZHANG Chuan |
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| Institution: | 1,2(1.Institute of Hydrogeoloical and Engineering Geology,Gansu Provincical Bureau of Geology and Mineral Exploitation and Development,Zhangye 734000,China;2.Geology Engineering Institute of Gansu Province,Zhangye 734000,China) |
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| Abstract: | The growth, mechanism, and development of the large landslide occurred in Dongxiang, Gansu Province,were studied in this research. The slope stability of the landslide was analyzed based on the data collected from geological field survey and geotechnical laboratory testing. The testing results not only provided important information for the control and manage of large landslide hazard, but also served as a good example for the future engineering practice. |
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