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中文摘要：
本文论述了季节性冻融条件下大型U型混凝土衬砌渠道渠基水分运移机理。经过一个完整冻融循环季节的原型观测，获得了渠基不同部位0～40cm深度范围的水分冻结和运移变化特征，按时间序列对冻结期含水量变化进行了回归分析，采用水分运动基本方程并结合热流方程建立了冻融渠基水热耦合模型，利用差分法对冻结过程中渠基非饱和土壤水分运移进行了模拟计算。模拟计算值与实测值对比分析表明，模拟计算结果与试验结果基本吻合。
英文摘要：
The transfer mechanism of soil moisture in concrete lining base of U-shape canal in the process of seasonal freezing and thawing was studied. The prototype observation of soil moisture movement in a freezing and thawing cycle was carried out and the characteristics of the soil moisture movement within the depth of 40 cm in the vicinity of canal base were obtained. The observation data were analyzed using regression analysis according to time series. On this basis, the moisture movement equation is combining with the heat transfer equation to establish a heat-fluid coupled model for describing the moisture movement in the cyclic process of freezing and thawing. The simulation is in good agreement with prototype observation data.
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