2022年9月5日泸定MS6.8地震的同震地质灾害发育特征及主控因素分析

张佳佳 陈龙 李元灵 刘民生 石胜伟 易靖松 张文 张世林 孙金辉 杨栋 鲜杰良 蔡佳君

张佳佳,陈龙,李元灵,刘民生,石胜伟,易靖松,张文,张世林,孙金辉,杨栋,鲜杰良,蔡佳君. 2022. 2022年9月5日泸定MS6.8地震的同震地质灾害发育特征及主控因素分析. 地震学报,45(0):1−13 doi: 10.11939/jass.20220215
引用本文: 张佳佳,陈龙,李元灵,刘民生,石胜伟,易靖松,张文,张世林,孙金辉,杨栋,鲜杰良,蔡佳君. 2022. 2022年9月5日泸定MS6.8地震的同震地质灾害发育特征及主控因素分析. 地震学报,45(0):1−13 doi: 10.11939/jass.20220215
Zhang J J,Chen L,Li Y L,Liu M S,Shi S W,Yi J S,Zhang W,Zhang S L,Sun J H,Yang D,Xian J L,Cai J J. 2022. Development characteristics and controlling factors of co-seismic geo-hazards triggered by the Luding MS6.8 earthquake occurred on September 5, 2022. Acta Seismologica Sinica,45(0):1−13 doi: 10.11939/jass.20220215
Citation: Zhang J J,Chen L,Li Y L,Liu M S,Shi S W,Yi J S,Zhang W,Zhang S L,Sun J H,Yang D,Xian J L,Cai J J. 2022. Development characteristics and controlling factors of co-seismic geo-hazards triggered by the Luding MS6.8 earthquake occurred on September 5, 2022. Acta Seismologica Sinica45(0):1−13 doi: 10.11939/jass.20220215

2022年9月5日泸定MS6.8地震的同震地质灾害发育特征及主控因素分析

doi: 10.11939/jass.20220215
基金项目: 中国地质调查局地质调查项目(DD20221741)、第二次青藏高原综合科学考察研究项目(2019QZKK0902)、自然资源部深地动力学重点实验室自主(开放)研究课题(编号:J1901)、中国地质调查局地质调查项目(DD20221630)和国家自然科学基金(42230312、42020104007)联合资助
详细信息
    作者简介:

    张佳佳,博士研究生,工程师,主要从事活动断裂的地质灾害效应研究。e-mail:jimjia2008@163.com

    通讯作者:

    刘民生,教授级高级工程师,主要从事地质灾害评价与防治相关研究,e-mail:489629205@qq.com

  • 中图分类号: P315.9

Development characteristics and controlling factors of co-seismic geo-hazards triggered by the Luding MS6.8 earthquake occurred on September 5, 2022

  • 摘要: 本文基于对2022年9月5日泸定MS6.8地震的野外调查,结合遥感解译结果,总结了泸定地震同震地质灾害的发育特征和主控因素,研判了同震地质灾害的演化趋势,并针对同震地震灾害防灾减灾的不同阶段给出了相应的建议,结果表明:泸定地震同震地质灾害整体以小-中型的崩塌、滑坡为主,集中分布在磨西镇及海螺沟、得妥镇湾东村、得妥镇大渡河沿岸三个区域;主震及余震、鲜水河活动断裂、地形地貌、特殊岩土体是控制泸定地震同震崩滑空间分布的的主控因素;泸定地震震后地质灾害在未来10年内会极为活跃。需要密切关注磨西河及支沟、大渡河河谷两侧的高陡岸坡,大渡河高阶地、磨西台地边缘区域,以及磨西镇、得妥镇同震崩滑密集发育的泥石流沟谷;根据同震地质灾害应急防范的管理逻辑,建议地方政府应按照过渡性安置详查阶段、恢复重建阶段、长远规划阶段三个阶段来针对性的开展地质灾害的防灾减灾工作。

     

  • 图  1  2022年9月5日四川泸定地震区域构造位置图

    Figure  1.  Tectonic location of Luding earthquake occurred on September 5,2022

    图  2  2022年9月5日四川泸定地震同震地质灾害分布图

    Figure  2.  Distribution of co-seismic landslides triggered by Luding earthquake

    图  3  磨西镇及海螺沟区域典型地质灾害发育特征

    (a) 磨西台地典型冰水堆积物崩塌(29°38′22.74″N,102°7′31.85″E,镜向N);(b) 海螺沟景区内的高位崩塌(29°36′54.37″N,102°4′39.44″E,镜向NE)

    Figure  3.  Characteristics of typical geo-hazards in Moxi town and Hailuo gully

    (a)- Collapse occurred in glaciofluvial sediment around Moxi platform (29°38′22.74″N,102°7′31.85″E, photo direction N);(b)- High-locality collapse occurred in Hailuo gully (29°36′54.37″N,102°4′39.44″E ,photo direction NE)

    图  4  湾东村区域典型地质灾害发育特征

    (a) 湾东村区域大沟内的同震崩滑(29°32′2.06″N,102°8′29.25″E,镜向S);(b)-湾东村村委会周边同震崩滑的面状特征(29°32′3.61″N,102°8′19.79″E,镜像SW)

    Figure  4.  Characteristics of typical geo-hazards in Wandong village

    (a)- Collapse occurred in Da gully of Wandong village (29°32′2.06″N,,102°8′29.25″E,photo direction S);(b)- Polygon shape feature of landslides around Wandong village committee (29°32′3.61″N,102°8′19.79″E, photo direction SW)

    图  5  得妥镇大渡河两岸典型地质灾害发育特征

    (a) 得妥镇大渡河大桥上游的同震崩滑(29°32′40.38″N,102°9′44.10″E,镜向NW);(b)- 磨岗岭滑坡后缘变形特征(29°37′35.00″N,102°9′0.38″E,镜像N)

    Figure  5.  Characteristics of typical geo-hazards along Detuo segment of Dadu River

    (a)- Landslides occurred in the upstream of Dadu River bridge of S211 road (29°38′22.74″N,102°9′44.10″E,photo direction NW);(b)- Deformation feature of Mogangling landslide (29°37′35.00″N,102°9′0.38″E,photo direction N)

    图  6  磨西镇-田湾乡鲜水河断裂沿线同震崩滑与断裂、地震的位置关系(同震崩滑基于遥感解译)

    Figure  6.  The spatial relationship between co-seismic landslides and fault/earthquakes along Moxi-Tianwan segment of Xianshuihe fault

    图  7  同震崩滑距离发震断裂的空间分布规律

    Figure  7.  The spatial distribution law between co-seismic landslides and the seismogenic fault

    图  8  震区特殊岩土体中的同震崩塌、滑坡

    (a) 燕子沟景区公路沿线的冰水堆积崩塌(29°42′9.84″N, 102°1′11.29″E,镜向S);(b) 海螺沟景区公路沿线坡积碎石土中形成的滑坡(29°36′17.65″N, 102°4′44.21″E,镜向NE);(c) 大渡河沿岸S211公路云母片岩中的顺向坡滑坡(29°42′7.60″N, 102°11′40.83″E,镜向SW);(d) 燕子沟景区公路北侧斜坡花岗岩中的崩塌(29°42′7.60″N, 102°2′11.11″E,镜向W)

    Figure  8.  Co-seismic landslides occurred in special rock and sediment mass

    (a)- Collapse occurred in glaciofluvial sediment along road in Yanzi gully (29°42′9.84″N,102°1′11.29″E,photo direction S);(b)- Landslide occurred in gravel soil along road in Hailuo gully (29°36′17.65″N,102°4′44.21″E,photo direction NE);(c)- Consequent landslide occurred in mica slate along S211 road along Dadu River (29°42′7.60″N,102°11′40.83″E,photo direction SW);(d)- Rockfall occurred in granite along road in Yanzi gully (29°42′7.60″N,102°2′11.11″E,photo direction W)

    表  1  历史地震震后地质灾害活跃期统计

    Table  1.   Statistics of active period of geo-hazard after historical earthquakes

    地震1923年日本
    关东地震
    1999年台湾
    集集地震
    2005年巴基斯坦
    Kashmir地震
    2008年
    汶川地震
    2013年
    芦山地震
    震级Ms7.9Ms7.6Ms7.6Ms8.0Ms7.0
    震后地质灾害活跃期15 a5 a5 a20 a10 a
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  • 收稿日期:  2022-11-25
  • 网络出版日期:  2023-01-04

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