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四川九寨沟Ms7.0级地震滑坡应急快速评估

刘甲美 王涛 石菊松 栗泽桐

刘甲美, 王涛, 石菊松, 等, 2017. 四川九寨沟Ms7.0级地震滑坡应急快速评估. 地质力学学报, 23 (5): 639-645.
引用本文: 刘甲美, 王涛, 石菊松, 等, 2017. 四川九寨沟Ms7.0级地震滑坡应急快速评估. 地质力学学报, 23 (5): 639-645.
LIU Jiamei, WANG Tao, SHI Jusong, et al., 2017. EMERGENCY RAPID ASSESSMENT OF LANDSLIDES INDUCED BY THE JIUZHAIGOU MS 7.0 EARTHQUAKE, SICHUAN, CHINA. Journal of Geomechanics, 23 (5): 639-645.
Citation: LIU Jiamei, WANG Tao, SHI Jusong, et al., 2017. EMERGENCY RAPID ASSESSMENT OF LANDSLIDES INDUCED BY THE JIUZHAIGOU MS 7.0 EARTHQUAKE, SICHUAN, CHINA. Journal of Geomechanics, 23 (5): 639-645.

四川九寨沟Ms7.0级地震滑坡应急快速评估

基金项目: 

国家自然科学基金 41372374

国家自然科学基金 41572313

中国地质调查局地质调查项目 DD20160271

中国地质调查局地质调查项目 12120114035501

详细信息
    作者简介:

    刘甲美(1987-), 男, 博士, 近年来主要从事地震地质灾害调查与定量评估研究。E-mail:ljm19870918@126.com

    通讯作者:

    王涛(1982-), 男, 博士, 副研究员, 主要从事工程地质与地质灾害评价等研究工作。E-mail:wangtao_ig@163.com

  • 中图分类号: P42.22

EMERGENCY RAPID ASSESSMENT OF LANDSLIDES INDUCED BY THE JIUZHAIGOU MS 7.0 EARTHQUAKE, SICHUAN, CHINA

  • 摘要: 基于地震滑坡危险性评估的Newmark累积位移模型,利用震前获取的震区地形数据、区域地质资料,结合地震动近实时获取技术,开展了四川九寨沟Ms 7.0级地震诱发滑坡的应急快速评估。地震滑坡位移分析结果表明,同震滑坡活动的中—高强度区分布在断层两侧宽约4 km的带状区域内,整体沿北西方向延伸。其中,极震区的丰雪塘、日则和干海子等城镇驻地及附近道路的滑坡强度相对较高;震前、震后影像对比表明九寨沟地震诱发的滑坡类型以浅表型碎屑流及小规模崩塌为主,且同震碎屑流多是在震前已有碎屑流的基础上进一步活动扩展而来,震后汛期泥石流隐患也不容忽视;通过典型地区滑坡位移分析结果与震前、震后影像对比,表明滑坡位移分析结果能够较好的反映同震滑坡的宏观分布特征,但在场地尺度上吻合程度欠佳,后续将通过提升岩性和地形等数据质量进行改进。研究结果可为灾情研判提供宝贵信息,对提高灾害应急救援效率具有重要意义。

     

  • 图  1  基于Newmark累积位移方法的地震滑坡快速评估流程

    Figure  1.  Flowchart of rapid assessment of earthquake-induced landslides based on the Newmark cumulative displacement method

    图  2  九寨沟Ms7.0地震区域斜坡临界加速度(a)与地震动峰值加速度(b)分布图

    Figure  2.  Distribution diagrams of critical acceleration and peak ground motion acceleration in the Jiuzhaigou Ms 7.0 earthquake region

    图  3  九寨沟Ms7.0地震极震区同震滑坡位移分布图

    Figure  3.  Distribution diagrams of the estimated Newmark displacements in the Jiuzhaigou Ms 7.0 earthquake region

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  • 收稿日期:  2017-09-04
  • 刊出日期:  2017-10-01

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