三峡水库蓄水条件下树坪滑坡变形特征及稳定性分析

发布时间：2018-03-16 03:33

本文选题：三峡水库　切入点：树坪滑坡　出处：《水电能源科学》2017年03期 　论文类型：期刊论文

【摘要】：为了解三峡水库蓄水对树坪滑坡的影响,基于监测资料分析了滑坡位移随水库蓄水变化的规律,采用有限元分析软件Geo-studio分析了各蓄水阶段树坪滑坡的渗流场、位移场和稳定性变化特征。结果表明,水库蓄水过程可分为125~139~135m、135~156~145m和145~175~145m三个阶段,每个蓄水阶段对树坪滑坡的影响程度不同;库水位上升时滑体内地下水浸润线呈内凹趋势,库水位下降时滑体内地下水浸润线呈外凸趋势,且凹凸程度与运行水位差正相关;第一阶段蓄水过程主要引起树坪滑坡前缘局部变形,第二阶段蓄水过程中滑坡前缘变形量增大且变形逐步向滑坡中部发展,第三阶段蓄水过程中滑坡前缘及中部变形量明显增大,变形逐渐向后发展。最后根据树坪滑坡变形机理,提出了防治措施。研究成果可为三峡库区管理提供理论依据。
[Abstract]:In order to understand the influence of water storage in three Gorges Reservoir on Shuping landslide, based on monitoring data, the law of landslide displacement changing with reservoir water storage is analyzed, and the seepage field of Shuping landslide is analyzed by using finite element analysis software Geo-studio. The results show that the water storage process of the reservoir can be divided into three stages, namely, 125U 139m 135U 156U 145m and 145U 175U 145m, and the influence of each stage on Shuping landslide is different, and the groundwater infiltration line of the slip body shows an internal concave trend when the reservoir water level rises. When the reservoir water level drops, the underground water infiltration line in the sliding body tends to be convex, and the concave and convex degree is positively related to the operating water level difference, the first stage water storage process mainly causes the local deformation of the front edge of Shuping landslide. During the second stage of water storage, the deformation of the front edge of the landslide increases and the deformation gradually develops to the middle part of the landslide. During the third stage of water storage, the amount of deformation of the front edge and the middle part of the landslide increases obviously, and the deformation gradually develops backward. Finally, according to the deformation mechanism of Shuping landslide, The research results can provide theoretical basis for the management of the three Gorges Reservoir area.
【作者单位】：成都理工大学地质灾害防治与地质环境保护国家重点实验室;
【基金】：地质灾害防治与地质环境保护国家重点实验室自主课题基金项目(SKLGP2015Z008) 三峡水库滑坡调查研究专题项目
【分类号】：P642.22

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