北方季节性冻土地区渠道刚性衬砌因基土冻胀造成破坏 ,对此 ,铺设聚苯乙烯板作为保温防冻措施。经过 3年试验研究 ,提出保温板厚度计算方法 ,针对不同位置 ,试验不同板厚 ,进行多项观测。从基土温度、冻深、冻胀量、含水量等的变化 ,分析了保温板的防冻效果。 Rigid lining of seasonal channel in the northern part of the country is destroyed due to frost heave of the soil. In this regard, polystyrene plates are laid as a measure to keep warm and freeze. After 3 years of experimental research, proposed insulation board thickness calculation method, for different locations, test different thickness, a number of observations. Based on the change of temperature, freezing depth, frost heaving capacity and water content, the antifreeze effect of insulation board is analyzed.