三峡库区树坪滑坡形成机理与演化特征  

Mechanism of Formation and Evolutionary Characteristics of Shuping Landslide in the Three Gorges Reservoir Area

作　　者：滕明明 王孔伟 王宵亮[1,2] 赵志豪 周准 刘士元 TENG Ming-ming;WANG Kong-wei;WANG Xiao-liang;ZHAO Zhi-hao;ZHOU Zhun;LIU Shi-yuan(Key Laboratory of Geological Hazards on Three Gorges Reservoir Area,Ministry of Education,Yichang 443002,China;College of Civil Engineering&Architecture,China 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》2022年第10期178-182,共5页Water Resources and Power

基　　金：国家自然科学基金重点项目(U2034203);三峡大学学位论文培优基金项目(2021SSPY017)。

摘　　要：树坪滑坡是三峡库区典型滑坡之一,澄清其形成机理及演化特征对研究三峡库区地质灾害具有指导作用,基于工程地质勘察资料,利用构造地质、工程地质分析理论,采用钻井层位对比方法,对树坪滑坡形成机理及演化特征进行重新认识,得出树坪滑坡整体上经历了三个演化阶段,即滑坡前期演化阶段(碎裂岩形成阶段);碎裂岩体破坏阶段,该阶段以碎裂岩体底界滑带形成以及逐步贯通为标志,基岩破坏形成的堆积物规模代表树坪滑坡的整体规模,目前推算为400×10^(4)m^(3),远小于认知;堆积型滑坡后期演化阶段,现今树坪滑坡东部碎石土堆积的变形过程所表现出的特征代表着该阶段的演化过程。Shuping landslide is one of the typical landslides in the Three Gorges Reservoir Area. The clarification of its formation mechanism’s and evolutionary characteristics is instructive for the study of geological hazards in the Three Gorges Reservoir Area. On the basis of the previous engineering geological survey data, the theory of tectonic geology, engineering geological analysis and the method of drilling stratigraphic comparison were adopted to reconceptualize the formation mechanism and evolutionary characteristics of Shuping landslide. It draws the following conclusions. The Shuping landslide as a whole has gone through three evolutionary stages. The pre-landslide evolutionary stage(fractured rock formation stage);The fractured rock body destruction stage. This stage should be marked by the formation of the slip zone at the bottom boundary of the fractured rock body, as well as the gradual penetration. The scale of the pile formed by bedrock destruction represents the overall scale of the Shuping landslide, which is currently projected to be 400×10^(4)m^(3), much smaller than the current understanding;The late evolutionary stage of the pile-up landslide, which is represented by the characteristics shown in the deformation process of the present-day Shuping landslide eastern debris soil pile-up.

关 键 词：井位对比 堆积型滑坡 形成机理 破坏特征 演化趋势 

分 类 号：P642.22[天文地球—工程地质学] TV221.2[天文地球—地质矿产勘探]