本文提出了大U形混凝土渠道的冻结、冻胀特征及其预测方法。并指出,当冻结前土基含水量不大于15.07％时,土基不冻胀;不大于17.28％时,法向冻胀力为零。从对法向冻胀力的产生、发展和影响因素的研究中,得出了大U形渠道的法向冻胀力设计使用值和计算图式,另对不同衬砌形式的抗冻害效果进行了比较。 This paper presents the freezing and frost heaving characteristics of large U-shaped concrete channels and their prediction methods. It is also pointed out that when the soil moisture content before freezing is not more than 15.07%, the soil-based anti-frost swells; when it is less than 17.28%, the normal frost heave force is zero. From the study of the generation, development and influencing factors of normal frost heave force, the design and calculation values ​​of the normal frost heave force of large U-shaped channels were obtained, and the antifreeze effects of different lining forms were also studied. Compare.