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季节性冻土地区的渠道衬砌易遭受冻胀破坏，为探明渠道衬砌的冻胀破坏机理，采用力学理论基本计算方法，考虑渠道衬砌自重、法向冻胀力、法向冻结力和切向冻结力等四种作用力，建立 U 形渠道直坡板的挠度方程，依据渠道衬砌坡板不同位置的实测冻胀量，联立方程组，求解出未知冻胀力。结果表明，①利用该方法可以简单准确计算渠道直坡板的最危险截面位置和未知冻胀力；②利用该模型的解析解对渠道实测冻胀量进行计算比较分析，该模型计算出的冻胀力与实测值吻合度高。该方法易于准确求解渠道衬结构的砌冻胀内力，为渠道冻胀计算理论提供了新思路。
In order to find out the mechanism of frost heave and collapse of channel liner, the basic calculation method of mechanical theory is adopted to consider the lining weight of channel, normal frost heaving force, normal freezing force and tangential direction Freezing force and other four kinds of forces to establish the U-shaped channel of the slope of the deflection equation, according to the different positions of the channel lining slab measured frost heave, simultaneous equations, unknown frost heave. The results show that (1) the method can be used to calculate the most dangerous cross-section position and the unknown frost heave force easily and accurately. (2) By using the analytical solution of this model, the measured frost heaving volume of the canal is calculated and compared. The frozen The expansion force is in good agreement with the measured value. This method can easily and accurately solve the internal force of heaving inflation of channel lining structure and provides a new idea for the calculation theory of channel frost heave.