张御阳, 裴向军, 唐皓, 王东坡, 谷虎, 董源. 2018: 反倾岩坡倾倒变形结构面影响效应研究. 工程地质学报, 26(4): 844-851. DOI: 10.13544/j.cnki.jeg.2017-384
    引用本文: 张御阳, 裴向军, 唐皓, 王东坡, 谷虎, 董源. 2018: 反倾岩坡倾倒变形结构面影响效应研究. 工程地质学报, 26(4): 844-851. DOI: 10.13544/j.cnki.jeg.2017-384
    ZHANG Yuyang, PEI Xiangjun, TANG Hao, WANG Dongpo, GU Hu, DONG Yuan. 2018: EXPERIMENTAL TESTS FOR IMPACT OF STRUCTURAL SURFACES TO TOPPLING DEFORMATION IN ANTI-DIPPED ROCK SLOPES. JOURNAL OF ENGINEERING GEOLOGY, 26(4): 844-851. DOI: 10.13544/j.cnki.jeg.2017-384
    Citation: ZHANG Yuyang, PEI Xiangjun, TANG Hao, WANG Dongpo, GU Hu, DONG Yuan. 2018: EXPERIMENTAL TESTS FOR IMPACT OF STRUCTURAL SURFACES TO TOPPLING DEFORMATION IN ANTI-DIPPED ROCK SLOPES. JOURNAL OF ENGINEERING GEOLOGY, 26(4): 844-851. DOI: 10.13544/j.cnki.jeg.2017-384

    反倾岩坡倾倒变形结构面影响效应研究

    EXPERIMENTAL TESTS FOR IMPACT OF STRUCTURAL SURFACES TO TOPPLING DEFORMATION IN ANTI-DIPPED ROCK SLOPES

    • 摘要: 为探究斜坡内赋存不同角度裂隙对反倾岩质斜坡倾倒变形影响效应,设计9组底摩擦试验,对比无裂隙、含一组陡裂隙和一陡一缓两组裂隙的3种类型试验,并研究不同裂隙角度对破裂面影响效应。研究发现:陡倾裂隙倾角的变化对岩坡变形及主破裂面形态有明显规律性影响,陡倾裂隙倾角越陡,发生倾倒破坏的初始破坏部位逐渐偏浅,破坏面积相对减小,破裂面从近直线型逐渐转变成近弧形;缓倾裂隙的赋存,使陡倾裂隙顺尖端开裂增长并且相互沟通形成贯通的破裂面过程更加快捷;主破裂面上覆层状岩体在倾倒变形时,会在其中部产生反向弯曲折断;通过定量分析,发现随着陡倾裂隙倾角增大,岩坡倾倒变形破坏幅度降低,而主破裂面无论是长度还是反映迹线复杂度的分维值亦随之降低。

       

      Abstract: Nine groups of floor-friction simulations are designed to investigate the effect of different angle cracks to the anti-dipped rock slopes. They are divided into no fissure group, a steep fissure group and a group of a steep fissure and a gentle fissure. The effect of different crack angles on the fracture surface is examined. The following conclusions are obtaine. The change of the dip angle of the steep fissure has an obvious regular influence on the deformation of rock slope and the morphology of the main fracture surface. For the steeper dip angle of the steep fissures, the initial site of destruction gradually is shallower, and the damage area is relatively reduced, and the fracture surface can gradually change from the near line to the near arc. Because of the existence of the gentle dip crack, the process that steep dip fissure along the tip of the steep fissures and communicating with each other to form a penetrating fracture surface is quicker. In the event of toppling deformation, stratified rock on the main rupture surface produces reverse bending breaking in the middle area. Through quantitative analysis, it is found that with the increase of fissure dip angle, the failure amplitude of toppling deformation on rock slopes is reduced. Besides, for the main fracture surface, both the length and the fractal dimension of trace complexity decreases accordingly.

       

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