降雨入渗下高填强夯矿渣边坡滑坡机理研究

罗平平 王兰甫 高献伟 张芳

罗平平, 王兰甫, 高献伟, 张芳. 2011: 降雨入渗下高填强夯矿渣边坡滑坡机理研究. 工程地质学报, 19(6): 844-851.
引用本文: 罗平平, 王兰甫, 高献伟, 张芳. 2011: 降雨入渗下高填强夯矿渣边坡滑坡机理研究. 工程地质学报, 19(6): 844-851.
LUO Pingping, WANG Lanfu, GAO Xianwei, ZHANG Fang. 2011: LANDSLIDE MECHANISM OF DYNAMICALLY COMPACTED SLAG SLOPE UNDER RAINFALL INFILTRATION. JOURNAL OF ENGINEERING GEOLOGY, 19(6): 844-851.
Citation: LUO Pingping, WANG Lanfu, GAO Xianwei, ZHANG Fang. 2011: LANDSLIDE MECHANISM OF DYNAMICALLY COMPACTED SLAG SLOPE UNDER RAINFALL INFILTRATION. JOURNAL OF ENGINEERING GEOLOGY, 19(6): 844-851.

降雨入渗下高填强夯矿渣边坡滑坡机理研究

详细信息
    作者简介:

    罗平平,岩土工程专业.Email:luopingping@hpu.edu.cn

  • 中图分类号: TU452

LANDSLIDE MECHANISM OF DYNAMICALLY COMPACTED SLAG SLOPE UNDER RAINFALL INFILTRATION

  • 摘要: 义马煤业集团股份有限公司所属综能公司在建场地中部有一20m高矿渣边坡,矿渣为三叠系砂岩、泥岩,堆积至今已有10~50a。该边坡整体属软质岩石,多全风化土状和强风化状,砂岩碎块手刻可碎,结构疏松、分选性差、粒间结合力弱、透水性强。虽经强夯处理,但在2010年雨季期间在边坡中下部仍出现多处滑塌。为研究该高填强夯矿渣边坡在降雨入渗下的变形特征和滑坡机理,借助于弹塑性力学有限元和非饱和渗流力学等理论,建立了高填矿渣边坡的位移场-非饱和渗流场耦合数值模型,详细分析了降雨入渗条件下边坡的位移场、渗流压力分布、体积含水量和安全系数等特点。研究结果表明:随着降雨的持续进行,高填强夯矿渣边坡安全系数大幅降低; 强夯后边坡渗透性降低,渗流正压集中于坡顶一定深度范围内,且随着降雨的持续进行,渗流正压逐渐增加至稳定,负压值基本保持不变,但负压区逐渐缩小,表明负压对强夯矿渣边坡的影响有限,重点是做好该类边坡坡顶一定深度范围内的排水措施,以消减渗流正压; 正压区体积含水量上升至饱和状态; 持续降雨条件下坡脚出现剪切破坏,导致边坡中下部出现滑塌。其研究成果对于矿山矸石山边坡、尾矿坝、高填碎石土路基等渣土混合边坡稳定性研究有重要借鉴意义。
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出版历程
  • 收稿日期:  2011-01-25
  • 修回日期:  2011-05-08
  • 刊出日期:  2011-12-25

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