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不同临空条件的层状反倾岩质边坡倾倒变形几何特征参数影响规律

黄少平 晏鄂川 尹晓萌 陈前 李兴明

黄少平, 晏鄂川, 尹晓萌, 陈前, 李兴明. 不同临空条件的层状反倾岩质边坡倾倒变形几何特征参数影响规律[J]. 地质科技通报, 2021, 40(1): 159-165. doi: 10.19509/j.cnki.dzkq.2021.0111
引用本文: 黄少平, 晏鄂川, 尹晓萌, 陈前, 李兴明. 不同临空条件的层状反倾岩质边坡倾倒变形几何特征参数影响规律[J]. 地质科技通报, 2021, 40(1): 159-165. doi: 10.19509/j.cnki.dzkq.2021.0111
Huang Shaoping, Yan Echuan, Yin Xiaomeng, Chen Qian, Li Xingming. Action law of geometrical characteristic parameters in the anti-dip rock slopes under different free face condition[J]. Bulletin of Geological Science and Technology, 2021, 40(1): 159-165. doi: 10.19509/j.cnki.dzkq.2021.0111
Citation: Huang Shaoping, Yan Echuan, Yin Xiaomeng, Chen Qian, Li Xingming. Action law of geometrical characteristic parameters in the anti-dip rock slopes under different free face condition[J]. Bulletin of Geological Science and Technology, 2021, 40(1): 159-165. doi: 10.19509/j.cnki.dzkq.2021.0111

不同临空条件的层状反倾岩质边坡倾倒变形几何特征参数影响规律

doi: 10.19509/j.cnki.dzkq.2021.0111
基金项目: 

国家重点基础研究发展计划("973"计划)项目 2011CB710600

国家自然科学基金项目 2019053086

详细信息
    作者简介:

    黄少平(1989-), 男, 现正攻读工程地质专业博士学位, 主要从事岩土体稳定性评价与利用研究工作。E-mail:792116933@qq.com

    通讯作者:

    晏鄂川(1969-), 男, 教授, 博士生导师, 主要从事岩体稳定性评价科研与教学工作。E-mail:yecyec6970@163.com

  • 中图分类号: P642

Action law of geometrical characteristic parameters in the anti-dip rock slopes under different free face condition

  • 摘要: 层状反倾岩质边坡是一种常见边坡类型,其变形破坏模式多样、力学机制复杂、影响因素众多。为揭示层状反倾岩质边坡不同临空条件几何特征参数对反倾边坡倾倒变形影响规律,通过3DEC并结合数理统计系统深入研究几何特征参数对倾倒变形影响。研究表明:①反倾边坡具有3个临空面时边坡变形最大,1个临空面时边坡变形最小;②变形随边坡高度、切坡角度增大而增大,随节理面与临空面夹角的增大而减小,随岩层厚度增大先增大后减小;③2个临空面夹角90°时边坡变形最大;④1个、2个临空面时节理倾角60°时位移最大,3个临空面时随节理倾角增大而增大。

     

  • 图 1  数值模拟简化模型

    θ.切坡角度; h.边坡高度; w.边坡宽度; φ.坡面夹角; ω.2个临空面夹角; d.岩层厚度; α.节理倾角; γ.节理面与临空面夹角

    Figure 1.  A simplified model for numerical simulation

    图 2  不同临空条件反倾边坡破坏模式

    Figure 2.  Failure modes of anti-clinal slopes under different free faces conditions

    图 3  某水电站右岸两临空面反倾边坡弯曲倾倒现象

    Figure 3.  Block-flexure toppling phenomenon of two free faces anti-dip slopes on right bank of hydropower station

    图 4  某水电站右岸2#公路三临空面反倾边坡弯曲倾倒

    Figure 4.  Block-flexure toppling phenomenon of three free faces anti-dip slopes on 2# road of right bank of hydropower station

    图 5  坡高对边坡变形影响

    Figure 5.  Influence of slope height on slope deformation

    图 6  切坡角度对边坡变形影响

    Figure 6.  Influence of slope cut angle on slope deformation

    图 7  坡面夹角对边坡变形影响

    Figure 7.  Influence of angle between slope surfaces on slope deformation

    图 8  节理面与临空面的夹角对边坡变形影响

    Figure 8.  Influence of included angle between the joint surface and the free face on slope deformation

    图 9  临空面与节理倾角呈大角度相交

    Figure 9.  Air surface intersecting the joint dip at a large angle

    图 10  两临空面夹角对边坡变形的影响

    Figure 10.  Influence of angle between two free surface on slope deformation

    图 11  岩层厚度对边坡变形影响

    Figure 11.  Influence of layer thickness on slope deformation

    图 12  节理倾角对边坡变形影响

    Figure 12.  Influence of joint inclination angle on slope deformation

    表  1  数值模拟选取参数

    Table  1.   Parameter selection of numerical stimulation

    岩体参数 密度/(kg·m-3) 体积模量/GPa 剪切模量/GPa 黏聚力/MPa 内摩擦角/(°) 抗拉强度/MPa
    岩体 2 600 2.1 1.14 5 45 0.7
    结构面参数 法向刚度/(GPa·m-1) 剪切刚度/(GPa·m-1) 黏聚力/MPa 内摩擦角/(°)
    结构面 5 6 0.09 30
    下载: 导出CSV
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  • 收稿日期:  2020-01-08

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