在综合分析了三峡库区水库滑坡的内外影响因素后，针对三峡库区2 000余处涉水滑坡、特别是针对其中大于100万m3的特大型滑坡，在统计分析的基础上，提出了基于物质组成和地质结构的三峡库区水库复活型滑坡分类方案，将滑坡分为黏黄土滑坡、碎屑堆积层滑坡以及岩质滑坡，并分析了各类滑坡的库水响应特征。针对库区蓄水以来变形(破坏)的151个特大型滑坡进行综合分析，提出了基于滑坡复活机理的三峡库区水库复活型滑坡分类方案，分为库水浮托型滑坡、动水压力型滑坡以及库水浸泡软化型滑坡。
Abstract
On the basis of analyzing the external and internal influential factors of landslides in the Three Gorges Reservoir area, we put forward two classification schemes for the landslides triggered by reservoir. First, by statistical analysis and mechanical analysis on over 2000 landslides in the Three Gorges Reservoir area, especially the landslides larger than 1million m3, we classified the landslides into clayey loess landslide, debris landslide, and rockslide in terms of material composition and geological structure. We also analyzed the deformation characteristics responding to reservoir water storage for each category. The second classification scheme is based on landslide mechanism triggered by reservoir. By comprehensive analysis on 151 landslides deformed or collapsed since the impoundment of reservoir, we classified the landslides into three categories which are respectively caused by reservoir water floating, ground water pushing and reservoir water softening.
关键词
三峡库区 /
复活型滑坡 /
滑坡分类 /
地质结构 /
机理分析
Key words
Three Gorges Reservoir area /
reservoir-triggered landslides /
landslide classification /
geological structure /
mechanism analysis
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基金
国家自然科学基金资助项目(41272310)
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