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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
Based on the previous research results of predecessors and authors, this paper summarizes the formation and development of large and medium-sized landslides in the Loess Plateau and the soil structure effects of landslides. It is pointed out that trimatis red clay (N2) plays an important role in controlling and influencing the formation of landslides in the Loess Plateau Factors and its material composition, engineering characteristics and the relationship between the weathered belt (unconformity) and the landslide and its role in the occurrence of landslides