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川藏铁路卡子拉山滑坡发育特征与防灾减灾对策

铁永波 徐伟 梁京涛 蒙明辉 李富 赵聪

铁永波, 徐伟, 梁京涛, 蒙明辉, 李富, 赵聪. 川藏铁路卡子拉山滑坡发育特征与防灾减灾对策[J]. 水文地质工程地质, 2021, 48(5): 129-136. doi: 10.16030/j.cnki.issn.1000-3665.202103097
引用本文: 铁永波, 徐伟, 梁京涛, 蒙明辉, 李富, 赵聪. 川藏铁路卡子拉山滑坡发育特征与防灾减灾对策[J]. 水文地质工程地质, 2021, 48(5): 129-136. doi: 10.16030/j.cnki.issn.1000-3665.202103097
TIE Yongbo, XU Wei, LIANG Jingtao, MENG Minghui, LI Fu, ZHAO Cong. Characteristics of Kazila mountain landslide and its mitigation measures on the Sichuan-Tibet Railway[J]. Hydrogeology & Engineering Geology, 2021, 48(5): 129-136. doi: 10.16030/j.cnki.issn.1000-3665.202103097
Citation: TIE Yongbo, XU Wei, LIANG Jingtao, MENG Minghui, LI Fu, ZHAO Cong. Characteristics of Kazila mountain landslide and its mitigation measures on the Sichuan-Tibet Railway[J]. Hydrogeology & Engineering Geology, 2021, 48(5): 129-136. doi: 10.16030/j.cnki.issn.1000-3665.202103097

川藏铁路卡子拉山滑坡发育特征与防灾减灾对策

doi: 10.16030/j.cnki.issn.1000-3665.202103097
基金项目: 中国地质调查局项目地质调查项目(DD20190640);国家自然科学基金项目(41772324)
详细信息
    作者简介:

    铁永波(1979-),男,博士,教授级高级工程师,博士生导师,主要从事地质灾害评价与防治研究。E-mail:tyb2009@qq.com

  • 中图分类号: P642.2

Characteristics of Kazila mountain landslide and its mitigation measures on the Sichuan-Tibet Railway

  • 摘要: 为查明川藏铁路卡子拉山隧道进口规划建设区地质灾害特征,评价其在川藏铁路建设和运营期间可能遭受的地质灾害风险,采用高精度遥感、机载LiDAR、工程地质勘查等“空-天-地”一体化技术对该隧道进口规划区开展调查研究。结果表明:川藏铁路卡子拉山隧道进口规划区内发育有1#、2#滑坡和俄洛堆不稳定斜坡;1#滑坡规模约32.48×106 m3,2#滑坡规模约10.15×106 m3,均为已发生的特大型岩质滑坡;俄洛堆不稳定斜坡位于2处滑坡中部,规模约35.80×104 m3,下部为强风化岩体,上部为碎石土结构,为中型复合型结构斜坡。评价认为:川藏铁路卡子拉山隧道进口选线从2处滑坡体中部山脊穿过,2处滑坡对铁路选线未构成地质安全风险,但隧道进口穿过的俄洛堆不稳定斜坡存在潜在地质安全风险;1#、2#滑坡体在天然工况下处于稳定状态,俄洛堆不稳定斜坡在天然和地震工况下处于稳定状态,在暴雨工况下处于欠稳定状态。为规避工程建设扰动诱发潜在的滑坡风险,建议将卡子拉山隧道选线进口向东南侧平移,通过边坡开挖的合理设计、施工期间的实时监测及运营期间的针对性治理等措施,从源头上对潜在滑坡风险进行防控,以保证工程建设及运营安全。研究结果可为川藏铁路选线提供科学的地质依据。
  • 图  1  卡子拉山典型岩体结构特征

    Figure  1.  Structural characteristics of the typical rock mass in the Kazila mountain

    图  2  卡子拉地区地质背景图

    Figure  2.  Geological map of the Kazila mountain

    图  3  卡子拉山滑坡及不稳定斜坡分布特征图

    Figure  3.  Distribution characteristic of the Kazila mountain landslide and unstable slope

    图  4  卡子拉山1#滑坡体工程地质剖面图(剖面A-A’)

    Figure  4.  Engineering geological profile of the Kazila 1# landslide (section A-A’)

    图  5  卡子拉山滑坡滑带土特征

    Figure  5.  Characteristics of soil in sliding zone of the Kazila mountain landslide

    图  6  卡子拉山俄洛堆不稳定斜坡物探解译剖面图

    Figure  6.  Geophysical interpretation profile of the Eluodui unstable slope in the Kazila mountain

    图  7  雅砻江流域典型地层构造对岩体变形影响剖面图(引自文献[3])

    Figure  7.  Profile of typical stratigraphic structure on rock mass deformation in the Yalong River catchment(cited from Ref.[3])

    表  1  卡子拉山1#滑坡岩土体主要物理力学参数

    Table  1.   Values of main physical parameters of rock and soil mass of 1# landslide in the Kazila mountain

    岩土体名称重度/(kN·m-3黏聚力/kPa内摩擦角/(°)
    天然饱和天然饱和天然饱和
    滑体碎石土20.521.520.814.245.038.0
    滑带角砾土20.220.214.314.327.027.0
    中风化炭质板岩26.527.52090.041.0
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-03-29
  • 修回日期:  2021-07-22
  • 网络出版日期:  2021-09-09
  • 刊出日期:  2021-09-10

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