三趾马红土与西北黄土高原滑坡

    HIPPARION LATERITE AND LANDSLIDE HAZARDS ON LOESS PLATEAU OF NORTHWESTERN CHINA

    • 摘要: 本文在前人和作者以往研究成果的基础上总结了黄土高原大中型滑坡的形成发育规律;滑坡发生的土体结构效应;指出三趾马红土(N2)是控制和影响黄土高原滑坡形成的重要因素,并对其物质成分、工程特性及古风化带(不整合面)与滑坡的关系,及其在滑坡发生中的作用进行探讨。

       

      Abstract: The loess Plateau of northwestern China is located in a semiarid climate region with the maximum precipitation of less than 700 mm, but it is one of the areas with most serious landslide hazards in China. Landslides on the loess Plateau are both of large number and large scale, including numberous recent landslides formed in earlier Holecene and ancient landslides formed in Latc Middle Pleistocene. Among the factors controling the landslides on Loess Plateau Hipparion(N2) laterite servcs as a medium and sliding zone and plays an important role in formation of large and medium scale landslides on the Loess Plateau of northwestern China. Based on the predecessors studies, and recent reseach by authors, this paper summarizes the formation and development regularities of large and medium scale landslides on the Loess Plateau, the effect of soil mass structure on formation of landslides, the relation of landslides with material composition and engineering properties, and ancient weathered zone (unconformable surfacc) of Hipparion laterite. Finally the formation mechanism of landslides is discussed.

       

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