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DOI:
地质力学学报:2010,16(2):146-158
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都江堰-汶川公路汶川地震次生地质灾害主要特征和形成机理
(1.成都理工大学 地质灾害防治与地质灾害保护国家重点实验室,四川 成都 610059;2.四川省地质矿产勘查开发局,四川 成都 610081)
FORMATION MECHANISM OF GEO-HAZARDS TRIGGERED BY WENCHUA MS8.0 EARTHQUAKE ALONG DUJIANGYAN-WENCHUAN HIGHWAY
(1.State key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology, Chengdu 610059,China;2.Sichuan Bureau of Geology and Mineral Resources,Chengdu 610081,China)
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投稿时间:2010-05-07    
中文摘要: 汶川特大地震发生后,都江堰至汶川公路两旁次生地质灾害尤为严重,先后多次完全中断震中交通生命线,严重地影响了公路的安全运行和灾后重建。通过对汶川地震前后都江堰-汶川公路边坡现场调查资料对比分析,研究了该地段边坡的主要次生地质灾害类型及其破坏模式、形成机制和时空分布特点。破坏类型主要为碎屑流式、碎裂滑移式崩塌和碎裂-俯冲式、振荡-高速滑移式泥石流等,造成沿线边坡发生大面积浅表生改造破坏。此类灾害具有丛集性、相关性、分段性的明显特点。成因复杂的高陡岩土体是次生地质灾害的主要物质基础;强烈的场地地震效应和内外动力耦合作用是该地区地质灾害成生的主要因素。
Abstract:The geological hazards induced by the Wenchuan MS8.0 earthquake along the Dujiangyan-Wenchuan Highway are especially severe and have seriously affected the safe riding along the highway and the reconstructions. In order to prevent and reduce disasters effectively, main geo-hazard type, slope failure modes and its formation mechanism, and the tempo-spitial distribution in the area have been studied on the basis of the field investigations and statistic analysis of available data. The main damage types include debris flow to collapse, cataclastic rocks to collapse, and shatter-subduction type mudslides, oscillation high-speed sliding debris flows along the slope area. Born transformation induced by such disasters have intensive, systematic and subsection characteristic. Thegeologic hazards have many types and are notably divided into sectors; the high and steep rock deposits of complex origin become the main materials of geological hazards; intense earthquake effect and coupling of endogenic and exogenic forces are important factors for formation and occurrence of geological hazards in the area.
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基金项目:国家重点基础研究发展计划(973计划)课题“强震作用下斜坡失稳机理及分布规律”(2008CB4 25901)及国土资源部地灾应急调排查都汶路项目(20080629)资助。
引用文本:
甘建军,黄润秋,李前银,等,2010.都江堰-汶川公路汶川地震次生地质灾害主要特征和形成机理[J].地质力学学报,16(2):146-158.DOI:
GAN Jian-jun,HUANG Run-qiu,LI Qian-yin,et al,2010.FORMATION MECHANISM OF GEO-HAZARDS TRIGGERED BY WENCHUA MS8.0 EARTHQUAKE ALONG DUJIANGYAN-WENCHUAN HIGHWAY[J].Journal of Geomechanics,16(2):146-158.DOI:

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