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甘肃黑方台罗家坡滑坡演化过程及运动机制分析

郭富赟 张龙生 王信 宋晓玲

郭富赟,张龙生,王信,等. 甘肃黑方台罗家坡滑坡演化过程及运动机制分析[J]. 中国地质灾害与防治学报,2023,34(2): 11-20 doi: 10.16031/j.cnki.issn.1003-8035.202201006
引用本文: 郭富赟,张龙生,王信,等. 甘肃黑方台罗家坡滑坡演化过程及运动机制分析[J]. 中国地质灾害与防治学报,2023,34(2): 11-20 doi: 10.16031/j.cnki.issn.1003-8035.202201006
GUO Fuyun,ZHANG Longsheng,WANG Xin,et al. Analysis on evolution process and movement mechanism of the Luojiapo landslide in Heifangtai, Gansu Province[J]. The Chinese Journal of Geological Hazard and Control,2023,34(2): 11-20 doi: 10.16031/j.cnki.issn.1003-8035.202201006
Citation: GUO Fuyun,ZHANG Longsheng,WANG Xin,et al. Analysis on evolution process and movement mechanism of the Luojiapo landslide in Heifangtai, Gansu Province[J]. The Chinese Journal of Geological Hazard and Control,2023,34(2): 11-20 doi: 10.16031/j.cnki.issn.1003-8035.202201006

甘肃黑方台罗家坡滑坡演化过程及运动机制分析

doi: 10.16031/j.cnki.issn.1003-8035.202201006
基金项目: 甘肃省科技重大专项(19ZD2FA002)
详细信息
    作者简介:

    郭富赟(1970-),男,甘肃景泰人,博士,正高级工程师,主要从事地质灾害防灾减灾方面的研究工作。E-mail:fyg51913@163.com

    通讯作者:

    张龙生(1984-),男,甘肃陇南人,学士,工程师,主要从事地质灾害防灾减灾方面工作。E-mail:312073027@qq.com

  • 中图分类号: P642.22

Analysis on evolution process and movement mechanism of the Luojiapo landslide in Heifangtai, Gansu Province

  • 摘要: 2015年4月29日7时50分,甘肃省永靖县黑方台发生了大规模的滑坡,滑坡体积达1.27×106 m3,摧毁了14户民房和3家工厂,造成直接经济损失5460万元。在对灾害现场进行大量地质调查的基础上,结合遥感、三维激光扫描等综合调查手段和现场视频监测资料,对罗家坡滑坡演化滑动特征进行了详细描述,对滑坡高速远程机制进行了解析。研究结果表明:罗家坡滑坡从时间线上先后经过5个阶段5种滑动形态,分别是黄土错落-碎屑流、黄土泥岩-碎屑流、黄土-碎屑流、黄土泥流和黄土错落滑动阶段。滑坡运动模式可分为块体碎屑流和黄土泥流两种类型,其中块体-碎屑流高速远程形成机制与先期滑体的“填凹造床效应”和高含水的下垫面土体密切相关。研究结果对于进一步加深对黑方台地区高速远程滑坡的形成机制的认识和风险控制具有积极的指导意义。
  • 图  1  罗家坡滑坡位置图

    Figure  1.  Location of Luojiapo landslide

    图  2  罗家坡滑坡地质剖面图

    Figure  2.  Geological profile of Luojiapo landslide

    图  3  罗家坡滑坡前后地貌对比图

    Figure  3.  Comparison of landform before and after Luojiapo landslide

    图  4  罗家坡滑坡全景

    Figure  4.  Panorama of Luojiapo landslide

    图  5  罗家坡滑坡演化模式图

    Figure  5.  Evolution model of Luojiapo landslide

    图  6  罗家坡滑坡不同阶段堆积形态图

    Figure  6.  Accumulation form of Luojiapo landslide at different stages

    图  7  黄土泥流拉槽现象(前期堆积体形成明显的侧坎,最大高度1.1 m)

    Figure  7.  Loess mud flow trough phenomenon (obvious side sill formed by early accumulation, maximum height 1.1 m)

    图  8  滑坡区三维地形图

    Figure  8.  3D topographic map of landslide area

    图  9  滑坡“填凹造床效应”照片

    Figure  9.  “Effect of filling depression and forming bed” of landslide

    表  1  不同期次滑坡的运动特征参数

    Table  1.   Motion characteristic parameters of landslides in different stages

    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
    992211154354.209.3
    第一次黄土
    碎屑流
    1372301224895.7115.0
    第二次黄土
    碎屑流
    1862903356256.0118.6
    黄土泥流15527718446110.7013.2
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-01-07
  • 修回日期:  2022-05-05
  • 网络出版日期:  2023-01-12
  • 刊出日期:  2023-04-25

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