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研究胀缩土的成因，为地表建筑物防灾减灾，有一定的现实意义。根据胀缩土的工程地质特征，平面和垂向分布规律，右江高阶地胀缩土为冲洪积成因。
It is of practical significance to study the cause of swelling and shrinkage soil for disaster prevention and reduction of surface buildings. According to the engineering geology, flatness and vertical distribution of the expansive soil, the high-expansive soil in the Youjiang River is the cause of the alluvial accumulation.