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贵州关岭2010-06-28特大滑坡(简称“6.28”特大滑坡)造成99人死亡,其形成受到当地气候条件、地质条件和地貌等因素影响,发生机制和滑动具有一定的独特性。通过对滑坡的形成条件、发育特点和成因分析,揭示了此次滑坡的形成特征。研究表明:降雨是此次滑坡的诱发因素;滑坡具有分块滑动的特点,即坡积层和基岩先后发生滑坡;滑坡堆积体具有明显的“二元结构”特征,即滑坡堆积体前缘以及中下部为碎石土堆积,而上部为碎块石堆积,与一般滑坡堆积不同,是坡积层与基岩先后发生分块滑动的典型证据。研究成果对认识和研究此类滑坡具有重要的科学意义,也可为今后指导防灾和减灾提供参考。
Guizhou Guanling 2010-06-28 The Great Landslide (“6.28”) caused 99 deaths. Its formation is affected by local climatic conditions, geological conditions and topography. The occurrence mechanism and sliding have certain unique features. Through the formation of landslide conditions, development characteristics and causes analysis revealed the formation of the landslide characteristics. The research shows that rainfall is the inducing factor of the landslide. The landslide has the characteristics of block sliding, that is, the landslide has occurred successively in the slope piles and bedrock. The landslide accumulation body has the obvious feature of “binary structure” The leading edge and the middle and lower parts are gravelly soil accumulation, while the upper part is crushed stone accumulation, which is different from the general landslide accumulation. The research results have important scientific significance for understanding and studying such landslides, and can also provide reference for disaster prevention and disaster reduction in the future.