三峡库区白水河滑坡形成机理及变形特征  

Mechanism of Formation and Deformation Characteristics of Baihe Landslide in the Three Gorges Reservoir Area

作　　者：刘士元 王孔伟 周准[1,2] 赵志豪 王岚 张凯元[1,2] LIU Shi-yuan;WANG Kong-wei;ZHOU Zhun;ZHAO Zhi-hao;WANG Lan;ZHANG Kai-yuan(Key Laboratory of Geological Hazards on Three Gorges Reservoir Area,Ministry of Education,Yichang 443002,China;College of Civil Engineering and Architecture,Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡库区地质灾害教育部重点实验室,湖北宜昌443002 [2]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《水电能源科学》2023年第6期146-149,184,共5页Water Resources and Power

基　　金：国家自然科学基金重点项目(U2034203);湖北省创新群体项目(2020CFA049)。

摘　　要：鉴于三峡库区白水河顺层滑坡的形成演化过程及蓄水后的变形特征研究尚不深入,在野外地质调查的基础上,利用最新勘察资料和白水河滑坡GPS监测资料,采用岩芯对比分析方法分析了白水河滑坡的岩土体结构及蓄水后的变形特征,发现白水河滑坡演化过程经历了滑坡前期演化阶段、岩质滑坡演化阶段和堆积型滑坡演化阶段,目前白水河滑坡处于堆积型滑坡演化阶段;白水河堆积型滑坡是二期岩质滑坡破坏形成的滑坡堆积体垂向叠加的产物,中部存在粘土层;对应135、156-175 m水位,白水河滑坡的变形可划分为两个阶段,变形特征分别表现为缓倾台阶状和陡倾台阶状。该研究结果为白水河滑坡的治理提供了相应的决策建议,同时亦为具有相似结构特征的地质灾害的后期治理提供了方向。Baishuihe landslide is a typical representative of bedding landslide in the Three Gorges reservoir area.However,the research on its formation evolution process and deformation characteristics after water storage is not deep.On the basis of field geological investigation and the latest survey data and GPS monitoring data,this paper makes a de-tailed study on the rock and soil structure of Baishuihe landslide and its deformation characteristics after impounding.The results show that the evolution process of Baishuihe landslide has gone through the early stage of landslide,the rock land-slide and the accumulation landslide.At present,Baishuihe landslide is in the accumulation landslide stage;Baishuihe ac-cumulation landslide is the product of vertical superposition of landslide accumulation bodies caused by the destruction of the second-stage rock landslide,and there is a clay layer in the middle.Corresponding to the water level of 135 m and 156-175 m,the deformation of Baishuihe landslide can be divided into two stages.The deformation characteristics of Baishuihe landslide are gently inclined steps and steeply inclined steps.The research results provide the corresponding de-cision-making suggestions for the treatment of Baishui River landslide,and also provide the direction for the later treat-ment of geological disasters with similar structural characteristics.

关 键 词：白水河滑坡 粘土层 监测资料 变形特征 

分 类 号：TV697.23[水利工程—水利水电工程] P642.22[天文地球—工程地质学]