季节性冻土的冻胀作用对内蒙古河套灌区的农业生产具有重要的影响,水分的迁移是产生冻胀的直接原因,通过对河套灌区南边分干渠一个冻融周期内不同深度的温度和含水量进行现场测试,分析了温度对水分迁移的影响作用及水分迁移的规律.通过数据分析表明渠道边坡中下部水分迁移量比上部大,冻胀破坏严重,为渠道衬砌冻胀防护提供了依据.%The frost heave of seasonal frozen soil has an important influence on agricultural production in Hetao Irrigation Area of Inner Mongolia Autonomous Region.Water migration is the direct reason for the generation of the frost heaving damages.The field test was carried out to analyze the ground temperature and moisture content in South Canal of Hetao Irrigation District during a freezing and thawing cycle in order to research the influences of the temperature in the seasonally frozen ground area on the channel's moisture field as well as its changing laws.The results showed that a large amount of migrated moisture gathered in the middle-lower part of the canal slope, leading to serious frost-heaving damages, which provides the basis for the prevention of frost heave by channel lining.
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