吴树仁, 王涛, 石菊松, 辛鹏, 汪华斌, . 2010: 2008汶川大地震极端滑坡事件初步研究. 工程地质学报, 18(2): 145.
    引用本文: 吴树仁, 王涛, 石菊松, 辛鹏, 汪华斌, . 2010: 2008汶川大地震极端滑坡事件初步研究. 工程地质学报, 18(2): 145.
    WU Shuren, WANG Tao, SHI Ling, SUN Ping, SHI Jusong, LI Bin, XIN Peng, WANG Huabin. 2010: STUDY ON CATASTROPHIC LANDSLIDES TRIGGERED BY 2008 GREAT WENCHUAN EARTHQUAKE,SICHUAN,CHINA. JOURNAL OF ENGINEERING GEOLOGY, 18(2): 145.
    Citation: WU Shuren, WANG Tao, SHI Ling, SUN Ping, SHI Jusong, LI Bin, XIN Peng, WANG Huabin. 2010: STUDY ON CATASTROPHIC LANDSLIDES TRIGGERED BY 2008 GREAT WENCHUAN EARTHQUAKE,SICHUAN,CHINA. JOURNAL OF ENGINEERING GEOLOGY, 18(2): 145.

    2008汶川大地震极端滑坡事件初步研究

    STUDY ON CATASTROPHIC LANDSLIDES TRIGGERED BY 2008 GREAT WENCHUAN EARTHQUAKE,SICHUAN,CHINA

    • 摘要: 为了分析汶川地震诱发滑坡灾害事件强度和影响,本文以汶川地震诱发滑坡极端事件为线索,在统计分析前10个规模最大、位移最远、危害最重及最大滑坡堰塞湖分布特征的基础上,重点研究前三甲极端滑坡事件的简要特征,初步揭示: (1)汶川地震诱发的极端滑坡事件主要沿龙门山中央断裂(映秀北川断裂带)和Ⅹ-Ⅺ高烈度地段分布,强震的振动力、地震主传播方向和发震断裂NE向扩展作用是启动极端滑坡事件的主要原因; (2)规模最大的前10个滑坡和距离最大的前10个高速远程滑坡具有很好的重合特征,两者都反映汶川地震诱发的高能量滑坡事件; 其中,规模最大的绵竹市安县大光包滑坡,初步估算体积约742108m3,最大运动距离达到35km,距离排名第二; 距离最大的绵竹文家沟高速远程滑坡,初步估算最大位移为42km,其体积约15108m3,规模排名第二,这两个滑坡都属于世界上罕见的大型高能量高速远程滑坡; (3)前10个最大的灾难性滑坡事件,累计导致3751人死亡,单个滑坡引起的人员死亡超过100人,最多的达到1600人,属于世界上罕见的灾难性滑坡事件; (4)潜在危险性最大的10个滑坡堰塞湖,曾经威胁几十万人的生活安全,其中,最大的北川唐家山滑坡堰塞湖,曾经威胁下游绵阳市30万人的生活安全,这些滑坡堰塞湖都及时采取人工开挖措施排除了潜在危险。

       

      Abstract: In order to analyze the intensity and influence of landslides triggered by the great Wenchuan earthquake,a central idea in this paper is to focus on the first 3 extreme landslide events among the first 10 landslides with the largest volume,the longest sliding runout,the most serious hazard and the largest landslidedammed lake. The followings are revealed: (1)the extreme landslides are mainly distributed along the Longmenshan central fault and in the areas with high intensity of Ⅹ-Ⅺ; the strong vibration force,the main propagation direction of earthquake and the NE expansion of seismic fault are the major reasons for the initiation of extreme landslide events; (2)generally,the first 10 landslides both have the largest volume and the longest sliding long runout,among them,the Daguangbao landslide,located at Anxian county,Mianzhu city,is the first one,with the volume of 742 million m3 and the sliding long runout of 35 km; the second one is the Wenjiagou landslide in Qingping county,Mianzhu city,with the volume of 150 million m3 and the sliding runout of 42 km. The above two landslides are all rare rapid and long runout landslides with high energy in the world; (3)the first 10 catastrophic landslides totally caused 3751 deaths,and over 100 deaths are due to individual event,with the maximum of 1600; (4)the first 10 landslidedammed lakes with potential risk had threatened the lives safety for hundreds of thousands of people; among them,the Tangjiashan dammed lake is the largest one,which had imperiled 03 million peoples life of Mianyang city; fortunately,timely measures such as artificial excavation had been taken for removing of potential risk.

       

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