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三峡库区反倾岩质滑坡防治措施研究

谭维佳 代贞伟 陈云霞 覃雯

谭维佳, 代贞伟, 陈云霞, 等, 2017. 三峡库区反倾岩质滑坡防治措施研究. 地质力学学报, 23 (1): 78-87.
引用本文: 谭维佳, 代贞伟, 陈云霞, 等, 2017. 三峡库区反倾岩质滑坡防治措施研究. 地质力学学报, 23 (1): 78-87.
TAN Weijia, DAI Zhenwei, CHEN Yunxia, et al., 2017. STUDY ON CONTROL MEASURES OF COUNTER-TILT ROCK LANDSLIDE IN THREE GORGES RESERVOIR REGION. Journal of Geomechanics, 23 (1): 78-87.
Citation: TAN Weijia, DAI Zhenwei, CHEN Yunxia, et al., 2017. STUDY ON CONTROL MEASURES OF COUNTER-TILT ROCK LANDSLIDE IN THREE GORGES RESERVOIR REGION. Journal of Geomechanics, 23 (1): 78-87.

三峡库区反倾岩质滑坡防治措施研究

基金项目: 

“十二五”国家科技支撑项目 2012BAK10B01

中央高校基本科研业务费资助项目 自然科学类310826161013

中国地质调查局地质调查项目 12120114079101

中国地质调查局地质调查项目 DD20160268

详细信息
    作者简介:

    谭维佳(1988-),男,地质工程专业,博士,工程师,主要从事工程地质与地质灾害研究工作。E-mail:371422852@qq.com

  • 中图分类号: P642.22

STUDY ON CONTROL MEASURES OF COUNTER-TILT ROCK LANDSLIDE IN THREE GORGES RESERVOIR REGION

  • 摘要: 选取巫峡段茅草坡-典型反倾岩质滑坡为研究对象,阐述了库岸滑坡防治措施的分阶段设计流程(原则、思路和方法):首先基于已有的地质勘察资料和现阶段岸坡变形破坏特征分析岸坡变形破坏过程及现阶段所处的变形阶段,确定其相应的失稳模式和主控因素,提出滑坡防治比选方案;其次对于滑坡不同变形破坏阶段进行合理划分,运用数值模拟对滑坡防治各比选方案的治理效果开展岸坡不同变形破坏阶段的全过程评价,对比分析制定较合理的防治措施。研究结论主要有:(1)对同-岸坡而言,当其处于不同变形阶段时,其变形破坏模式和主控因素不完全相同,且同-防治方案的治理效果差别较大;(2)就茅草坡现阶段而言,滑坡处于变形破坏过程的坡脚弱化滑移阶段,此阶段变形破坏的主控因素为消落带岩体的弱化和滑移,格构护坡方案的造价低且防治效果最好,而锚杆锚固方案造价高且效果低。

     

  • 图  1  滑坡区地貌

    Figure  1.  Landscape of Maocaopo bank slope

    图  2  三峡库区地质构造纲要图(据殷跃平)

    Figure  2.  Structure outline map of Three Gorges Reservoir region

    图  3  茅草坡岸坡全貌

    Figure  3.  Full view of the Maocaopo bank slope

    图  4  2-2′工程地质剖面图

    Figure  4.  Engineering geological profile of 2-2′

    图  5  斜坡近地表岩体结构及变形迹象

    Figure  5.  Structure and deformation of the rock mass in near-surface of slope

    图  6  防治方案一简图

    Figure  6.  Diagram of No.1 treatment plan

    图  7  防治方案二简图

    Figure  7.  Diagram of No.2 treatment plan

    图  8  最大位移云图

    Figure  8.  Maximum displacement nephogram

    图  9  剪应变增量云图

    Figure  9.  Maximum shear strain increment nephogram

    图  10  塑性区分布图

    Figure  10.  plastic zone distribution

    图  11  治理工程现场施工图

    Figure  11.  Construction site of treatment project

    表  1  治理效果对比

    Table  1.   Treatment effect comparison of different plans

    防治方案 主要措施 防治位置 锚杆长度/m 工程造价/104 防治效果
    阶段1 阶段2
    最大位移降幅/% 剪应变增量降幅/% 最大位移降幅/% 剪应变增量降幅/%
    方案一 锚索锚固 184~248 m(岩梁下部) 30 3764.6 57 24 53 17
    方案二 格构锚固+混凝土护坡 156~178 m(消落带) 8~10 1357.5 87 97 13 0
    下载: 导出CSV
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  • 收稿日期:  2016-06-30
  • 刊出日期:  2017-02-28

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