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四川康定孔玉乡寸达河坝后山危岩带稳定性分析及运动特征预测

陈海军 胡卸文 赵亮 黄刚 阳博 李仕强 王宁

陈海军,胡卸文,赵亮,等. 四川康定孔玉乡寸达河坝后山危岩带稳定性分析及运动特征预测[J]. 中国地质灾害与防治学报,2023,34(0): 1-8 doi: 10.16031/j.cnki.issn.1003-8035.202202042
引用本文: 陈海军,胡卸文,赵亮,等. 四川康定孔玉乡寸达河坝后山危岩带稳定性分析及运动特征预测[J]. 中国地质灾害与防治学报,2023,34(0): 1-8 doi: 10.16031/j.cnki.issn.1003-8035.202202042
CHEN Haijun,HU Xie Xen,ZHAO Liang,et al. Stability analysis and motion prediction of dangerous rockmasses along the slope at Kongyu in Kangding Country,Sicuan[J]. The Chinese Journal of Geological Hazard and Control,2023,34(0): 1-8 doi: 10.16031/j.cnki.issn.1003-8035.202202042
Citation: CHEN Haijun,HU Xie Xen,ZHAO Liang,et al. Stability analysis and motion prediction of dangerous rockmasses along the slope at Kongyu in Kangding Country,Sicuan[J]. The Chinese Journal of Geological Hazard and Control,2023,34(0): 1-8 doi: 10.16031/j.cnki.issn.1003-8035.202202042

四川康定孔玉乡寸达河坝后山危岩带稳定性分析及运动特征预测

doi: 10.16031/j.cnki.issn.1003-8035.202202042
详细信息
    作者简介:

    陈海军(1991-),男,硕士研究生,主要从事地质工程方面的研究。E-mail:yehanputishu@163.com

    通讯作者:

    胡卸文(1963-),男,博导,教授,主要从事地灾防治方面的教学和科研工作。E-mail:huxiewen@163.com

  • 中图分类号: P642.21

Stability analysis and motion prediction of dangerous rockmasses along the slope at Kongyu in Kangding Country,Sicuan

  • 摘要: 危岩带位于乡政府后山斜坡,裂隙发育、岩体成块状,完整性较差。受地震和强降雨影响,局部危岩脱落形成危岩单体,沿斜坡滚落至坡脚,严重威胁坡脚乡政府所在地居民生命财产安全。文章对危岩进行了定性和定量的稳定性分析,综合判断各危岩体的稳定性情况。利用离散元软件UDEC建立模型,在裂隙水压力不同的情况下进行数值模拟,分析其稳定性情况。根据现场具体情况,选择典型危岩体,对其运动特征进行理论计算分析,利用Rockfall软件进行模拟,其结果对治理工程设计具有一定的指导意义。
  • 图  1  危岩分区图(镜向NE52°)

    Figure  1.  Dangerous rock zoning map

    图  2  ⅠW1危岩带全貌(镜向NE89°)

    Figure  2.  Dangerous rock with the whole picture of ⅠW1

    图  3  危岩ⅠWY1-2赤平投影分析图

    Figure  3.  Red flat projection analysis of ⅠWY1-2

    图  4  滑移式危岩计算模型(后缘有陡倾裂隙)

    Figure  4.  Slip-type dangerous rock calculation model (trailing edge steep fissure)

    图  5  倾倒式危岩计算模型(后缘有陡倾裂隙)[12]

    Figure  5.  Dumping dangerous rock calculation model (trailing edge steep fissure)

    图  6  危岩ⅠWY1-1全景图(镜向69°)

    Figure  6.  The panorama of ⅠWY1-1

    图  7  UDEC模型(天然)

    图  8  水平位移变化曲线图(天然)

    图  9  h=e/2时裂隙水模拟模型

    图  10  h=e/2时水平方向位移变化图

    图  11  落石运动计算剖面模型

    图  12  落石运动轨迹图

    图  13  落石终点的水平位置图

    图  14  落石弹跳高度变化图

    图  15  x=717 m处弹跳高度分布图

    图  16  落石能量变化图

    表  1  结构面抗剪强度指标标准值

    滑坡分期滑源区
    长度/m
    加速区
    长度/m
    减速堆积
    区/m
    滑动距离
    /m
    平均速度
    /(m·s−1
    最大速度
    /(m·s−1
    黄土泥
    岩滑坡
    992211153364.29.3
    第一次黄土
    碎屑流
    1372301223425.7115.0
    第二次黄土
    碎屑流
    1862903356256.0118.6
    黄土泥流15527718446110.713.2
    下载: 导出CSV

    表  2  通道2#恢复系数表

    Table  2.   Recovery factor table of the channel 2 #

    位置法向恢复系数Rn切向恢复系数Rt动摩擦系数k
    均值标准偏差均值标准偏差均值标准偏差
    AB0.400.040.890.0433.02
    BC0.380.040.880.0430.02
    CD0.380.040.880.0430.02
    DE0.400.040.800.0431.02
    EF0.400.040.800.0431.02
    FG0.400.040.800.0431.02
    GH0.350.040.820.0432.02
    HI0.360.040.820.0431.02
    IJ0.380.040.880.0433.02
    JK0.350.040.820.0428.02
    KL0.400.040.890.0433.0 2
    LM0.320.040.820.0430.02
    MN0.320.040.820.0430.02
    NO0.400.040.900.0400
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-02-23
  • 修回日期:  2022-07-22
  • 网络出版日期:  2023-03-01

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