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缓倾滑坡地质力学模型研究——以冯店滑坡为例

王治华 杜明亮 郭兆成 贾伟洁

王治华, 杜明亮, 郭兆成, 等, 2012. 缓倾滑坡地质力学模型研究——以冯店滑坡为例. 地质力学学报, 18 (2): 97-109, 186.
引用本文: 王治华, 杜明亮, 郭兆成, 等, 2012. 缓倾滑坡地质力学模型研究——以冯店滑坡为例. 地质力学学报, 18 (2): 97-109, 186.
WANG Zhi-hua, DU Ming-liang, GUO Zhao-cheng, et al., 2012. STUDY ON THE GEOMECHANICAL MODEL OF LANDSLIDE WITH LOW DIP ANGLE STRATA STRUCTURE:TAKING FENGDIAN LANDSLIDE AS AN EXAMPLE. Journal of Geomechanics, 18 (2): 97-109, 186.
Citation: WANG Zhi-hua, DU Ming-liang, GUO Zhao-cheng, et al., 2012. STUDY ON THE GEOMECHANICAL MODEL OF LANDSLIDE WITH LOW DIP ANGLE STRATA STRUCTURE:TAKING FENGDIAN LANDSLIDE AS AN EXAMPLE. Journal of Geomechanics, 18 (2): 97-109, 186.

缓倾滑坡地质力学模型研究——以冯店滑坡为例

详细信息
    作者简介:

    王治华(1965-), 女, 中国国土资源航空物探遥感中心教授, 博士生导师, 长期从事地质灾害环境遥感应用及"数字滑坡技术"研究。E-mail:577027159@qq.com

  • 中图分类号: P694

STUDY ON THE GEOMECHANICAL MODEL OF LANDSLIDE WITH LOW DIP ANGLE STRATA STRUCTURE:TAKING FENGDIAN LANDSLIDE AS AN EXAMPLE

  • 摘要: 在国内外缓倾滑坡研究的基础上,从滑坡形成机制出发,建立缓倾滑坡地质力学模型,采用数字滑坡技术结合地面调查获取滑坡规模、滑动面倾角、后缘拉裂槽积水深度等参数,代入模型表达式可获得滑坡的临界摩擦系数,进而获取滑坡的总下滑力和总阻滑力。提出临界摩擦系数的概念及求取方法,临界摩擦系数与缓倾滑坡的易滑性(或稳定性)直接相关,分析表明滑坡的临界摩擦系数与滑体规模(滑动面长与宽)、滑动面倾角正相关,与滑体重量反相关,滑坡后壁倾角在60°-90°范围的变化对缓倾滑坡易滑性的影响很微弱。

     

  • 图  1  滑坡体受力示意图

    Figure  1.  The diagram of landslide force analysis

    图  2  冯店滑坡交通位置及区域地质环境解译

    Figure  2.  Location and regional geological environment of Fengdian landslide

    图  3  冯店垮梁子陡崖出露的砂泥岩互层

    Figure  3.  Sand shale interbed exposed at scarp of Fengdian landslide

    图  4  冯店FD1滑坡遥感解译

    Figure  4.  Interpretation of Fengdian FD1 landslide

    图  5  冯店FD1滑坡主剖面

    Figure  5.  The principal section of Fengdian landslide

    图  6  模型程序界面

    (注:滑坡的总阻滑力和总下滑力应该是相等的,但是由于临界摩擦系数只取小数点之后四位,所以它们略有差别)

    Figure  6.  The model program interface

    表  1  不同滑坡重量的临界摩擦系数

    Table  1.   The critical friction coefficients with different landslide weights

    表  2  不同滑坡长度的临界摩擦系数

    Table  2.   The critical friction coefficients with different landslide lengths

    表  3  不同滑坡宽度的临界摩擦系数

    Table  3.   The critical friction coefficients with different landslide widths

    表  4  不同滑动面倾角下的临界摩擦系数

    Table  4.   The critical friction coefficients with different landslide slip angles

    表  5  不同滑坡后缘拉裂槽积水深度下的临界摩擦系数

    Table  5.   The critical friction coefficients with different landslide crack groove hydrostatic load heights

    表  6  不同滑坡后壁倾角下的临界摩擦系数

    Table  6.   The critical friction coefficients with different landslide scarp angles

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  • 收稿日期:  2011-12-14
  • 刊出日期:  2012-06-01

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