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基于贡献率权重模型的川藏铁路沿线大型滑坡危险性区划

边江豪 李秀珍 徐瑞池 王栋

边江豪, 李秀珍, 徐瑞池, 王栋. 2021: 基于贡献率权重模型的川藏铁路沿线大型滑坡危险性区划. 中国地质灾害与防治学报, 32(2): 84-93. doi: 10.16031/j.cnki.issn.1003-8035.2021.02.12
引用本文: 边江豪, 李秀珍, 徐瑞池, 王栋. 2021: 基于贡献率权重模型的川藏铁路沿线大型滑坡危险性区划. 中国地质灾害与防治学报, 32(2): 84-93. doi: 10.16031/j.cnki.issn.1003-8035.2021.02.12
Jianghao BIAN, Xiuzhen LI, Ruichi XU, Dong WANG. 2021: Hazard zonation of large-scale landslides along Sichuan—Tibet Railway based on contributing weights model. The Chinese Journal of Geological Hazard and Control, 32(2): 84-93. doi: 10.16031/j.cnki.issn.1003-8035.2021.02.12
Citation: Jianghao BIAN, Xiuzhen LI, Ruichi XU, Dong WANG. 2021: Hazard zonation of large-scale landslides along Sichuan—Tibet Railway based on contributing weights model. The Chinese Journal of Geological Hazard and Control, 32(2): 84-93. doi: 10.16031/j.cnki.issn.1003-8035.2021.02.12

基于贡献率权重模型的川藏铁路沿线大型滑坡危险性区划

doi: 10.16031/j.cnki.issn.1003-8035.2021.02.12
基金项目: 国家自然科学面上基金(41772386);国家重点研发计划项目(YS2018YFGH000001);中铁二院科学技术研究计划项目(KYY2018010(18-19))
详细信息
    作者简介:

    边江豪(1991-),男,河南新乡人,硕士研究生。主要从事山地灾害研究工作。E-mail: 1206186739@qq.com

    通讯作者:

    李秀珍(1975-),女,内蒙古乌盟人,地质工程专业,博士,研究员,主要从事地质灾害评价及预测研究。 E-mail:lxzljt@imde.ac.cn

  • 中图分类号: P694

Hazard zonation of large-scale landslides along Sichuan—Tibet Railway based on contributing weights model

  • 摘要: 川藏铁路工程是国家重大基础设施建设项目,保障铁路的顺利建设和后期安全运营十分重要。铁路沿线发育广泛、危害严重的大型滑坡已成为全线的关键控制性问题,关乎工程建设的成败。以川藏铁路工程沿线大型滑坡作为主要研究对象,采用历史数据分析、实地调查、遥感解译的研究方法,基于ArcGIS平台,采用贡献率权重模型对铁路沿线区域进行了大型滑坡危险性评价,并利用自然断点法对危险性评价结果进行分区及统计分析。研究结果表明:川藏铁路沿线共发育大型、特大型滑坡共147处,其中大型滑坡106处,特大型滑坡41处,主要分布于白玉至江达段、昌都至八宿段、朗县至加查段等区段;铁路沿线处于高中低度三个等级危险区的面积分别为35918.5 km2、95484.3 km2和12039.7 km2,高度危险区大型滑坡分布密度为0.00199处/km−2,约为中度或低度危险区的2倍,高度危险区主要集中在邦达—八宿段、古乡—拉月段、白玉—江达段。根据贡献率权重模型求得的川藏铁路沿线大型滑坡危险度等级与野外实地调查的大型滑坡分布密度是一致的。相关研究成果可以为川藏铁路工程建设提供科学参考与依据。
  • 图  1  川藏铁路沿线大型滑坡分布图

    Figure  1.  Distribution map of large landslides along Sichuan—Tibet Railway

    图  2  川藏铁路沿线典型大型滑坡

    Figure  2.  Typical landslide of Sichuan—Tibet Railway

    图  3  川藏铁路不同县、市大型滑坡分布数量统计图

    Figure  3.  Statistics on the number of large landslides in different counties and cities of Sichuan-Tibet Railway

    图  4  贡献率权重叠加模型的滑坡危险性区划原理简易图

    Figure  4.  Simple diagram of landslide hazard zonation based on contributing weights model

    图  5  各本底因子与大型滑坡分布图

    Figure  5.  Distribution map of background factors and large landslides

    图  6  因子贡献率图

    Figure  6.  Factor contribution rate

    图  7  川藏铁路沿线大型滑坡危险性区划图

    Figure  7.  Hazard zoning map of large-scale landslides along the Sichuan-Tibet Railway

    图  8  不同危险度等级内的大型滑坡分布密度

    Figure  8.  Distribution density of large landslides of different hazard rating

    表  1  川藏铁路沿线大型(含特大型)滑坡分段数量统计表

    Table  1.   Statistical table on the number of large landslides along the Sichuan-Tibet Railway

    编号区段线路长度/km大型滑坡/处特大型/处总数量/处线密度处/km
    1成都至康定段239.789090.040
    2康定至白玉段423.751120.005
    3白玉至江达段83.72395440.530
    8江达至昌都段119.865050.040
    9昌都至八宿段177.583130610.340
    10八宿至波密段206.391120.010
    11波密至林芝段208.812240.020
    12林芝至朗县段164.212020.010
    13朗县至加查段46.96161170.360
    14加查到拉萨段211.790110.005
    合计1882.8510641147
    下载: 导出CSV

    表  2  川藏铁路大型滑坡本底因子权重

    Table  2.   Contributing weights of background factors of large landslides in Sichuan-Tibet Railway

    因子自权重互权重
    高差0.520.310.170.17
    坡度0.600.350.060.15
    坡向0.500.310.190.18
    地层岩性0.570.340.090.17
    断裂带0.570.370.070.17
    河流水系0.620.310.070.16
    下载: 导出CSV

    表  3  不同危险度等级区间大型滑坡分布特征

    Table  3.   Characteristics of large landslides of different hazard rating

    危险度等级区划总面积/ km2面积所占百分比/ %滑坡点数/ 处数量所占百分比 /%滑坡密度/( 处·km−2
    低度危险区35918.525.03221.80.00089
    中度危险区95484.366.59161.90.00095
    高度危险区12039.78.52416.30.00199
    总计143442.6100147100
    下载: 导出CSV
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