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青海门源MS6.9地震极震区震害调查与防灾建议

李鑫 李智敏 盖海龙 殷翔 姚生海 刘强

李鑫,李智敏,盖海龙,殷翔,姚生海,刘强,2022. 青海门源MS6.9地震极震区震害调查与防灾建议. 震灾防御技术,17(1):84−94. doi:10.11899/zzfy20220109. doi: 10.11899/zzfy20220109
引用本文: 李鑫,李智敏,盖海龙,殷翔,姚生海,刘强,2022. 青海门源MS6.9地震极震区震害调查与防灾建议. 震灾防御技术,17(1):84−94. doi:10.11899/zzfy20220109. doi: 10.11899/zzfy20220109
Li Xin, Li Zhimin, Gai Hailong, Yin Xiang, Yao Shenghai, Liu Qiang. Investigation and Prevention Suggestion of Earthquake Disaster in the Extreme Earthquake Area of MS6.9 Earthquake in Menyuan County, Qinghai Province[J]. Technology for Earthquake Disaster Prevention, 2022, 17(1): 84-94. doi: 10.11899/zzfy20220109
Citation: Li Xin, Li Zhimin, Gai Hailong, Yin Xiang, Yao Shenghai, Liu Qiang. Investigation and Prevention Suggestion of Earthquake Disaster in the Extreme Earthquake Area of MS6.9 Earthquake in Menyuan County, Qinghai Province[J]. Technology for Earthquake Disaster Prevention, 2022, 17(1): 84-94. doi: 10.11899/zzfy20220109

青海门源MS6.9地震极震区震害调查与防灾建议

doi: 10.11899/zzfy20220109
基金项目: 中国地震局地震科技星火计划项目(XH22003C);青海省地震灾害风险普查项目
详细信息
    作者简介:

    李鑫,男,生于1995年。硕士,助理工程师。主要从事构造地质及灾后损失评估等工作。E-mail:240334326@qq.com

    通讯作者:

    刘强,男,生于1978年。博士,副教授。主要从事构造地质及地震工程方面的研究。E-mail:liuqiang@cug.edu.cn

Investigation and Prevention Suggestion of Earthquake Disaster in the Extreme Earthquake Area of MS6.9 Earthquake in Menyuan County, Qinghai Province

  • 摘要: 北京时间2022年1月8日1时45分青海省海北藏族自治州门源县(37.77°N,101.26°E)发生6.9级地震,此次地震极震区为距震中4 km的兰新高铁硫磺沟大桥附近(Ⅸ度区,面积约157 km2)。调查结果显示,在极震区大西沟至硫磺沟区域,道路、桥梁及房屋破坏较严重。沿区域内长约22 km的托来山-冷龙岭断裂带附近,道路形成多处裂缝与挤压鼓包,桥梁整体倾斜移位,房屋不同程度破坏。对极震区兰新高铁硫磺沟大桥及周边道路、房屋进行实地调查与震害分析,提出灾后重建及震害防御意见:对于灾区房屋建筑,组织专业技术人员进行详细调查及安全鉴定;建议定期对房屋建筑进行隐患排查及加固;对于兰新高铁硫磺沟大桥,建议原地修建,加设减隔震装置、连梁及柔性限位装置。
  • 图  1  青海门源MS6.9地震烈度

    Figure  1.  Map of seismic intensity for MS6.9 earthquake in Menyuan county, Qinghai province

    图  2  青海省门源县极震区调查示意

    Figure  2.  Schematic diagram of the investigation scope of the extreme survey in Menyuan county, Qinghai province

    图  3  地表破裂带变形特征

    Figure  3.  Deformation characteristics of surface rupture zone

    图  4  硫磺沟大桥梁板倾斜移位

    Figure  4.  Slant displacement of beams and slabs of Liuhuanggou bridge

    图  5  硫磺沟大桥不同程度破坏

    Figure  5.  Different damage degrees of the Liuhuanggou bridge

    6  不同结构房屋类型破坏调查

    6.  Damage investigation of houses with different structures

    图  7  硫磺沟大桥及道路破坏

    Figure  7.  Damage of the Liuhuanggou bridge and road

    图  8  房屋加固措施

    Figure  8.  House strengthening measures

    表  1  2022年门源MS6.9地震震源参数

    Table  1.   Source parameters for the 2022 Menyuan MS6.9 earthquakes

    来源纬度经度震级/MS走向/°倾角/°滑动角/°深度/km
    中国地震台网中心37.770°N101.260°E6.910.0
    USGS37.815°N101.278°E6.6104881511.5
    GCMT37.800°N101.310°E6.710482114.8
    GFZ37.810°N101.340°E6.6285821615.0
    下载: 导出CSV

    表  2  2022年门源MS6.9地震强震动记录分析

    Table  2.   Analysis of strong vibration records for the 2022 Menyuan MS 6.9 earthquakes

    台站
    名称
    台站经度台站纬度震中距/km震中
    方位角/°
    PGA/cm·s−2PGV/cm·s−1仪器
    烈度/°
    EWNSUDEWNSUD
    C002837.7°N101.3°E7.8324.6−456.9445.0355.327.623.412.08.2
    C002937.6°N101.2°E13.74.4210.8−144.1132.7−32.616.67.68.3
    C003637.8°N101.1°E15.1120.0−136.0−134.6−122.4−18.7−30.418.78.2
    C002737.6°N101.4°E18.0332.4−242.6198.7−114.316.19.6−7.67.6
    下载: 导出CSV

    表  3  硫磺沟大桥场地等效剪切波速

    Table  3.   Equivalent shear wave velocity of Liuhuanggou bridge site

    钻孔编号等效剪切波速/m·s−1覆盖层厚度/m
    LHG-336524.0
    LHG-739818.0
    下载: 导出CSV

    表  4  极震区不同结构类型房屋震害调查表

    Table  4.   Investigation on earthquake disaster of buildings with different structures in the extreme areas

    调查点结构类型
    砖混结构轻钢结构土石结构砖木结构
    数量/间面积/m2破坏情况数量/间面积/m2破坏情况数量/间面积/m2破坏情况数量/间面积/m2破坏情况
    1 1 20 轻微破坏
    2 26 1000 16间基本完好
    8间轻微破坏
    2间中等破坏
    3 46 2 000 42间基本完好
    4间轻微破坏
    4 2 30 基本完好 2 200 毁坏
    5 1 15 毁坏
    6 1 20 毁坏
    总计 1 20 74 3030 2 200 2 35
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-02-16
  • 网络出版日期:  2022-05-31
  • 刊出日期:  2022-03-31

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