王佳运, 魏兴丽, 薛强. 2008: 陕西延安杨崖滑坡的形成机理及其致灾分析. 地质通报, 27(8): 1230-1234.
    引用本文: 王佳运, 魏兴丽, 薛强. 2008: 陕西延安杨崖滑坡的形成机理及其致灾分析. 地质通报, 27(8): 1230-1234.
    WANG Jia--yun, WEI Xing-li, XUE Qiang. 2008: Formation mechanism and hazard causes of the Yangya landslide in Yan’an City, Shaanxi. Geological Bulletin of China, 27(8): 1230-1234.
    Citation: WANG Jia--yun, WEI Xing-li, XUE Qiang. 2008: Formation mechanism and hazard causes of the Yangya landslide in Yan’an City, Shaanxi. Geological Bulletin of China, 27(8): 1230-1234.

    陕西延安杨崖滑坡的形成机理及其致灾分析

    Formation mechanism and hazard causes of the Yangya landslide in Yan’an City, Shaanxi

    • 摘要: 不合理的人类工程活动是陕北黄土高原地区滑坡、崩塌等地质灾害的主要诱发因素之一,延安市杨崖滑坡是一个典型的多期人为诱发的滑坡。通过对杨崖滑坡力学变形破坏模式和形成因素的分析,认为杨崖滑坡为拉裂-压致滑移式变形过程,是先牵引、后推移的发育破坏过程,滑体的多次强烈扰动与老滑坡滑面的存在为滑坡形成的控制因素,不合理的削坡和人工削坡加载是其形成的诱发因素;对致灾原因进行了分析,选址不当、防灾避灾意识不强和治理措施不当是造成滑坡灾害的主要原因。

       

      Abstract: Unreasonable engineering activity is one of the main factors inducing geohazards such as landslides and rockfalls in the loess plateau of northern Shaanxi. The Yangya landslide in Yan’an City is a typical multi-stage, human-induced landslide. According to the failure model and forming factor of the Yangya landslide, it can be concluded that the Yangya landslide occurred through a process of extensional rupture-compressional slip deformation, i.e. a process of development and failure of dragging before pushing. The controlling factors of landslide formation are multiple intense disturbance and existence of the previous slide surface, and the triggering factors include unreasonable excavation, cutting and loading by mankind. Based on the analysis of the disaster causes, the authors think that improper selection of the site, poor consciousness of hazard prevention and incorrect control measures are the main causes of the disaster.

       

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