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    三峡库区黄土坡滑坡Ⅰ号崩滑体成因

    简文星 杨金

    简文星, 杨金, 2013. 三峡库区黄土坡滑坡Ⅰ号崩滑体成因. 地球科学, 38(3): 625-631. doi: 10.3799/dqkx.2013.063
    引用本文: 简文星, 杨金, 2013. 三峡库区黄土坡滑坡Ⅰ号崩滑体成因. 地球科学, 38(3): 625-631. doi: 10.3799/dqkx.2013.063
    JIAN Wen-xing, YANG Jin, 2013. Formation Mechanism of No.1 Part Slide of Huangtupo Landslide in the Three Gorges Reservoir Area. Earth Science, 38(3): 625-631. doi: 10.3799/dqkx.2013.063
    Citation: JIAN Wen-xing, YANG Jin, 2013. Formation Mechanism of No.1 Part Slide of Huangtupo Landslide in the Three Gorges Reservoir Area. Earth Science, 38(3): 625-631. doi: 10.3799/dqkx.2013.063

    三峡库区黄土坡滑坡Ⅰ号崩滑体成因

    doi: 10.3799/dqkx.2013.063
    基金项目: 

    国家自然科学基金面上项目 40972184

    国家自然科学基金面上项目 41272306

    详细信息
      作者简介:

      简文星(1967-), 男, 博士, 教授, 从事岩土工程与工程地质等方面的教学与科研工作. E-mail: wxjian@cug.edu.cn

    • 中图分类号: P642.22

    Formation Mechanism of No.1 Part Slide of Huangtupo Landslide in the Three Gorges Reservoir Area

    • 摘要: 黄土坡滑坡是三峡库区4个大型滑坡之一, 因其典型性和重要性, "长江三峡库区地质灾害研究优势学科创新平台"在此建立了巴东野外大型综合试验场.野外试验场隧洞群揭露滑坡结构, 有助于深入认识和研究黄土坡滑坡的地质结构特征和成因机制.通过试验隧洞开挖揭露黄土坡滑坡临江Ⅰ号崩滑体特征发现: (1)临江Ⅰ号崩滑体滑床基岩普遍发育层间剪切软弱夹层; (2)主隧洞与Ⅲ号支洞揭露滑体特征表明, 滑体物质组成为棕红色泥岩、粉砂岩碎石土, 灰色泥灰岩、灰岩碎石土, 各类破碎岩层, 滑体内潜水丰富, 渗水量较大; (3)试验隧洞揭露滑带具有多层位顺层发育特征, 平面范围与前人勘察成果较一致, 厚度在不同剖面处存在较大差异; (4)深部钻孔监测资料显示, 在土层与基岩面及层间剪切带均有蠕滑位移.分析得出: 临江Ⅰ号崩滑体是在重力和构造应力作用下顺多层软弱夹层、土层与基岩面发生蠕滑变形形成的, 具有多层滑动面.

       

    • 图  1  黄土坡滑坡工程地质平面图(据杨世松等,2001周云等,2009修改)

      1.滑坡周界;2.地质界线;3.175 m水位线;4.剖面线;5.地层年代;6.岩层产状;7.钻孔及编号;8.隧洞主轴线

      Fig.  1.  Geological plane of Huangtupo landslide

      图  2  主隧道(K0+690 m)~(K0+900 m)右侧壁剖面

      1.泥质灰岩;2.泥岩;3.泥灰岩;4.灰岩;5.崩滑堆积体;6.滑带土;7.断层带;8.滑带界线;9.断层界线;10.岩层界限

      Fig.  2.  Geological profile on right side of the test tunnel from K0+690 m to K0+900 m

      图  3  Ⅲ号支洞右侧壁剖面

      1.泥质灰岩;2.泥灰岩;3.破碎带;4.崩滑堆积体;5.滑带土;6.软弱夹层;7.滑带界线;8.软弱夹层界线;9.岩层界线

      Fig.  3.  Geological profile on right side of No.3 subsidiary test tunnel

      图  4  滑带与基岩接触关系K0+680.7 m

      Fig.  4.  Contacting relationship between surface of rupture and bedrock

      图  5  185 m高程滑带平面展布

      Fig.  5.  The intersectant line between the surfaces of rupture and the plane of 185 m altitude

      图  6  HZK5孔钻孔倾斜仪深度-位移曲线(据周云等,2008)

      Fig.  6.  Variation of displacement versus depth for borehole HZK5

      图  7  HZK5孔钻孔倾斜仪时间-位移曲线(据周云等,2008)

      Fig.  7.  Variation of displacement versus time for borehole HZK5

      图  8  临江Ⅰ号崩滑体-'工程地质剖面(据杨世松等, 2001, -'剖面修改)

      1.块裂岩;2.碎裂岩;3.散裂岩;4.灰岩;5.泥质灰岩;6.泥灰岩;7.地层年代;8.滑动面;9.钻孔及其编号;10.主隧洞;11.支洞轴线;12.原-'剖面滑面线(杨世松等,2001)

      Fig.  8.  -' geological profile of No.1 part slide of Huangtupo landslide

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    • 收稿日期:  2012-07-19
    • 刊出日期:  2013-05-15

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