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基于Newmark模型的尼泊尔Ms8.1级地震滑坡危险性快速评估

杨志华 张永双 郭长宝 杜国梁

杨志华, 张永双, 郭长宝, 等, 2017. 基于Newmark模型的尼泊尔Ms8.1级地震滑坡危险性快速评估. 地质力学学报, 23 (1): 115-124.
引用本文: 杨志华, 张永双, 郭长宝, 等, 2017. 基于Newmark模型的尼泊尔Ms8.1级地震滑坡危险性快速评估. 地质力学学报, 23 (1): 115-124.
YANG Zhi-hua, ZHANG Yong-shuang, GUO Chang-bao, et al., 2017. LANDSLIDE HAZARD RAPID ASSESSMENT IN THE Ms 8.1 NEPAL EARTHQUAKE-IMPACTED AREA, BASED ON NEWMARK MODEL. Journal of Geomechanics, 23 (1): 115-124.
Citation: YANG Zhi-hua, ZHANG Yong-shuang, GUO Chang-bao, et al., 2017. LANDSLIDE HAZARD RAPID ASSESSMENT IN THE Ms 8.1 NEPAL EARTHQUAKE-IMPACTED AREA, BASED ON NEWMARK MODEL. Journal of Geomechanics, 23 (1): 115-124.

基于Newmark模型的尼泊尔Ms8.1级地震滑坡危险性快速评估

基金项目: 

国家自然科学基金项目 41502313

国家科技基础性工作专项 2011FY110100-2

详细信息
    作者简介:

    杨志华(1982-), 男, 博士, 助理研究员, 主要从事工程地质与地质灾害防治等研究工作。E-mail:yangzh99@163.com

    通讯作者:

    张永双(1968-), 男, 博士, 研究员, 博士生导师, 主要从事工程地质与地质灾害防治等研究工作。E-mail:zhys100@sohu.com

  • 中图分类号: P631.8

LANDSLIDE HAZARD RAPID ASSESSMENT IN THE Ms 8.1 NEPAL EARTHQUAKE-IMPACTED AREA, BASED ON NEWMARK MODEL

  • 摘要: 在研究分析地震灾区地形地貌、地层岩性、地质构造、气象水文和典型地区滑坡的基础上,采用Newmark斜坡累积位移模型对2015年4月25日尼泊尔Ms 8.1级地震诱发的滑坡危险性的空间分布状况进行了快速评估,通过典型地区的滑坡遥感解译结果验证表明评估结果具有较好的可信度,初步反映了尼泊尔地震诱发滑坡危险性分布的基本特征。然后考虑降雨作用对震后滑坡危险性的影响,对地震叠加降雨诱发滑坡危险性分布进行了快速预测。研究结果对地震应急救灾中的地质灾害防灾减灾具有重要的参考意义。

     

  • 图  1  尼泊尔及中国藏南地区地理地貌图

    F1-喜马拉雅中央主断裂; F2-喜马拉雅边界主断裂; F3-藏南滑脱拆离系断裂

    Figure  1.  Geographical landform in Nepal and southwest Tibet of China

    图  2  尼泊尔及中国藏南区域地质图

    Figure  2.  Geological map of Nepal and southwest Tibet of China

    图  3  尼泊尔地震诱发典型崩塌、滑坡和堰塞湖实例(据尼泊尔地震应急专家组)

    a-吉隆滑坡形成堰塞湖; b-吉隆滑坡; c-地震引起樟木口岸边坡发生滚石; d-地震引起樟木滑坡发生局部变形

    Figure  3.  Typical cases of Nepal earthquake-induced geo-hazards

    图  4  Newmark模型的累积位移计算过程示意图[4]

    Figure  4.  Schematic diagram of calculation process of cumulative displacement of Newmark model

    图  5  尼泊尔地震滑坡危险性快速评估过程。

    (a)工程地质岩组, (b)斜坡坡度, (c)静态安全系数, (d)临界加速度, (e)地震峰值地面加速度, (f)地震诱发斜坡位移。

    Figure  5.  Rapid assessment procedure of Nepal earthquake-induced landslide hazard

    图  6  尼泊尔地震诱发滑坡危险性分布图

    Figure  6.  Distribution map of Nepal earthquake-induced landslide hazard

    图  7  尼泊尔地震诱发滑坡危险性快速评价结果与地质灾害分布统计关系图

    Figure  7.  Statistical relationship between earthquake-induced landslide hazard distribution and field landslide case distribution resulted from post-earthquake rapid remote sensing interpretation

    图  8  尼泊尔及中国藏南地区6—9月平均降雨空间分布图(1981—2007年)(据中国国家气象局)

    Figure  8.  Average rainfall distribution from June to September (1981—2007) in Nepal and southwest Tibet of China

    图  9  尼泊尔震区震后降雨诱发滑坡危险性分布图

    Figure  9.  Hazard distribution map of post-earthquake rainfall-induced landslide in Nepal seismic area

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  • 收稿日期:  2016-05-23
  • 刊出日期:  2017-02-28

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