摘要
通过对瓦依昂滑坡、塘岩光滑坡、千将坪滑坡滑坡三大滑坡工程地质比较研究,找出了其地形地质条件、诱发因素、变形特征的基本规律和共性,揭示了库水浮托与滑带浸泡软化及二者耦合的滑坡诱发机制;提出了水库顺层岩质滑坡的基于易滑地质结构的空间预测模型;初步总结了水库顺层岩质滑坡短期及临滑变形特征。
This paper examines three huge rockslides triggered by reservoir in the world They are the Vaint landslide in Italy,the Tangyanguang landslide in Hunan province of China and the Qianjiangping landslide in Three Gorges Reservoir of Central China.They have many similarities in geological conditions,triggering mechanism and deformation characteristics.The paper finds that the reservoir water flouting,slip surface soak softening and their coupling are the triggering causes.The paper proposes a landslide space prediction model.It is based on the geological structure included the following six essential factors： bedding slope structure,chair shape slope,soft inter-layers,slide out space,soft intercalation exposure at the toe,and deep and thick weathered rock mass.with the former four factors are the necessary conditions and the later two are selective.The main landslide deformation characteristics for short term are the formation of discontinued tensile cracks at the crown and the small collapse at the toe.The landslide deformation characteristics for near slide are the cracks at the crown continued and have closing tendency.The deep rockmass displacement orientation becomes upward.The creep v-t curve tangent is nearly upright.The creep speed is 20～30 cm per day.
出处
《工程地质学报》
CSCD
北大核心
2010年第1期52-59,共8页
Journal of Engineering Geology
基金
国家自然基金重点项目(50839004)资助
关键词
瓦依昂滑坡
塘岩光滑坡
千将坪滑坡
诱发机理
空间预测模型
Vaint landslide
Tanyanguang landslide
Qianjiangping landslide triggered mechanism
Space prediction model
Reservoir
Bedding
