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舟曲江顶崖滑坡的早期判识及风险评估研究

韩旭东 付杰 李严严 王高峰 曹琛

韩旭东, 付杰, 李严严, 王高峰, 曹琛. 舟曲江顶崖滑坡的早期判识及风险评估研究[J]. 水文地质工程地质, 2021, 48(6): 180-186. doi: 10.16030/j.cnki.issn.1000-3665.202104028
引用本文: 韩旭东, 付杰, 李严严, 王高峰, 曹琛. 舟曲江顶崖滑坡的早期判识及风险评估研究[J]. 水文地质工程地质, 2021, 48(6): 180-186. doi: 10.16030/j.cnki.issn.1000-3665.202104028
HAN Xudong, FU Jie, LI Yanyan, WANG Gaofeng, CAO Chen. A study of the early identification and risk assessment of the Jiangdingya landslide in Zhouqu county[J]. Hydrogeology & Engineering Geology, 2021, 48(6): 180-186. doi: 10.16030/j.cnki.issn.1000-3665.202104028
Citation: HAN Xudong, FU Jie, LI Yanyan, WANG Gaofeng, CAO Chen. A study of the early identification and risk assessment of the Jiangdingya landslide in Zhouqu county[J]. Hydrogeology & Engineering Geology, 2021, 48(6): 180-186. doi: 10.16030/j.cnki.issn.1000-3665.202104028

舟曲江顶崖滑坡的早期判识及风险评估研究

doi: 10.16030/j.cnki.issn.1000-3665.202104028
基金项目: 国家重点研发计划项目(2019YFC1509600;2019YFC1509702);国家自然科学青年基金项目(41807227);自然资源部地质环境监测工程技术创新中心开放课题(2020KFK1212007);中国地质调查局地质调查项目(DD20190646)
详细信息
    作者简介:

    韩旭东(1990-),男,博士,工程师,主要从事工程地质与灾害方面的研究工作。E-mail:hanxudong@mail.cgs.gov.cn

  • 中图分类号: P642.22

A study of the early identification and risk assessment of the Jiangdingya landslide in Zhouqu county

  • 摘要: 如何提前判识滑坡变形并对其进行早期风险评估已成为地质灾害防治领域的研究热点。文章以舟曲白龙江流域江顶崖堆积层滑坡为反分析案例,进行了滑坡变形早期判识及风险评估综合研究,提出了小基线集雷达干涉(SBAS-InSAR)技术解译分析、地质-力学联合分析、动力过程数值模拟分析三者相结合的滑坡变形早期判识与风险评估全流程分析模式。基于SBAS-InSAR技术解译能够准确地判识江顶崖滑坡的分布范围及早期形变特征,江顶崖滑坡的变形破坏模式为牵引式,滑坡体长度约680 m,宽度约210 m。基于早期识别信息,地质-力学联合分析表明:江顶崖滑坡为典型的老堆积层滑坡,前缘局部变形,破坏模式为牵引式,滑坡体平均厚度约35 m,滑床整体坡度较缓,失稳后运移速度不大。选取符合江顶崖滑坡体滑移摩擦特征的库伦摩擦模型,基于深度积分连续介质方程,分析计算滑坡体的动力学过程,结果表明:滑坡体滑移速度不大,最大值约为2.2 m/s,运动方式表现为推挤白龙江河道,堵江可能性较小,并且江顶崖滑坡体前缘错动完成后,该滑坡体滑移速度从前缘到后缘快速降为0,表现为牵引式运动特征。本次分析结果与实际相符,吻合度较高,采取的综合分析方法及研究模式可用于舟曲白龙江沿岸类似滑坡的早期判识及风险评估。
  • 图  1  舟曲江顶崖滑坡和江顶崖滑坡区域遥感影像

    Figure  1.  Jiangdingya ladslide and remote sensing image in the Jiangdingya landslide area in Zhouqu

    图  2  16期哨兵-1A SAR影像数据的空间与时间基线关联表

    Figure  2.  Association of spatial and temporal baselines of 16 periods of sentinel-1A SAR data

    图  3  江顶崖滑坡区域SAR影像数据干涉相位分布

    Figure  3.  Interference phase distribution of SAR images in the Jiangdingya landslide area

    图  4  江顶崖滑坡区域地表平均变形速率

    Figure  4.  Average surface deformation rate in the Jiangdingya landslide area

    图  5  江顶崖滑坡体雷达视线方向累积变形量曲线

    Figure  5.  Cumulative deformation curves of the Jiangdingya landslide in radar line of sight

    图  6  江顶崖滑坡地质剖面

    Figure  6.  Geological profile of the Jiangdingya landslide

    图  7  江顶崖滑坡稳定性计算模型

    Figure  7.  Stability calculation model for the Jiangdingya landslide

    图  8  江顶崖滑体滑后几何形态

    Figure  8.  Post-sliding geometry of the Jiangdingya landslide body

    图  9  江顶崖滑体滑移速度监测曲线

    Figure  9.  Velocity monitoring curve of the Jiangdingya landslide body

    表  1  哨兵-1影像数据和ALOS PALSAR地形数据信息

    Table  1.   Information of Sentinel-1A images and ALOS PALSAR topography data

    数据参数属性
    哨兵-1A类型SLC
    图像模式IW
    波段及波长/cmC, 5.5
    入射角/(°)43.3
    轨道升轨
    方位向分辨率/m20
    距离向分辨率/m5
    极化方式同向垂直极化(VV)
    ALOS PALSAR观测模式单极化(FBS)
    地形数据分辨率/m12.5
    下载: 导出CSV

    表  2  滑坡体物质物理力学性质

    Table  2.   Physical and mechanical properties of the landslide body

    土体密度/(kg·m−3摩擦角/(°)黏聚力/kPa状态
    滑坡体21001610饱和
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-04-13
  • 修回日期:  2021-05-15
  • 网络出版日期:  2021-10-22
  • 刊出日期:  2021-11-15

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