大光包滑坡工程地质研究

黄润秋 张伟锋 裴向军

黄润秋, 张伟锋, 裴向军. 2014: 大光包滑坡工程地质研究. 工程地质学报, 22(4): 557-585. doi: 10.13544/j.cnki.jeg.2014.04.004
引用本文: 黄润秋, 张伟锋, 裴向军. 2014: 大光包滑坡工程地质研究. 工程地质学报, 22(4): 557-585. doi: 10.13544/j.cnki.jeg.2014.04.004
HUANG Runqiu, ZHANG Weifeng, PEI Xiangjun. 2014: ENGINEERING GEOLOGICAL STUDY ON DAGUANGBAO LANDSLIDE. JOURNAL OF ENGINEERING GEOLOGY, 22(4): 557-585. doi: 10.13544/j.cnki.jeg.2014.04.004
Citation: HUANG Runqiu, ZHANG Weifeng, PEI Xiangjun. 2014: ENGINEERING GEOLOGICAL STUDY ON DAGUANGBAO LANDSLIDE. JOURNAL OF ENGINEERING GEOLOGY, 22(4): 557-585. doi: 10.13544/j.cnki.jeg.2014.04.004

大光包滑坡工程地质研究

doi: 10.13544/j.cnki.jeg.2014.04.004
基金项目: 

地质灾害防治与地质环境保护国家重点实验室团队课题(SKLGP2012Z001),国家自然科学基金重点项目(编号:41130745)资助

详细信息
    作者简介:

    黄润秋(1963-),男,博士,教授,博士生导师,主要从事工程地质和岩土工程方面的教学与研究工作.Email:hrq@cdut.edu.cn

  • 中图分类号: P642

ENGINEERING GEOLOGICAL STUDY ON DAGUANGBAO LANDSLIDE

  • 摘要: 大光包滑坡是512汶川MS8.0级特大地震触发的规模最大的滑坡。滑坡位于汶川地震发震断裂上盘,距发震断裂直线距离3.0~4.5km,覆盖面积7.12km2,体积11.59108m3,是我国有史料记载以来规模最大的滑坡,也是目前世界上已知为数不多的几个10109m3以上的超大规模滑坡之一。本文作者自2011以来,在过去工作基础上,对该滑坡开展了1:2000滑坡工程地质测绘,结合物探、坑槽探及浅孔钻探等工作,编制了滑坡工程地质系列图件,从而进一步查明了大光包滑坡的平面和空间形态、滑体结构、滑面位置和堆积特征等,获得了较为完整的滑坡要素定量数据。研究成果还原了大光包滑坡发生时的真实场景;揭示了滑坡堆积地貌特征、植被分布、岩性分布以及堆积体结构特征等,认为大光包滑坡是受强震和特定地形条件、岩体结构条件(层间剪切断层和两组陡裂结构面)控制的楔形体失稳。在此基础上,根据滑坡的要素组成和运动堆积特征,对滑坡进行了分区,分为滑坡断壁区、主滑堆积区和次滑堆积区3个大区,进一步划分为10个小区,分析阐明了各区特征。最后,对大光包滑坡的发生过程和形成机理进行了概要分析,将其概括为5个主要阶段:即强震拉裂阶段、锁固段剪断及楔形体失稳阶段、高速滑动和急刹车运动堆积阶段、拆离滑动阶段、断壁崩滑阶段。研究还发现:强震作用下滑带的进一步碎裂化,以及可能出现的水击作用可能是滑坡骤然启动的主要原因。
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出版历程
  • 收稿日期:  2014-07-08
  • 修回日期:  2014-07-13
  • 刊出日期:  2014-08-25

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