为预测和控制冻结法施工中围岩的冻胀行为，依据弹塑性体在具有膨胀趋势时可蓄积变形能的理论，分析具有膨胀趋势受约束的冻土具有该类变形能，并在约束不足或解除时表现为冻胀应力和冻胀应变。为此，在弹性变形能理论基础上，提出冻胀潜势的概念及其表述。该概念以冻胀应力和冻胀应变函数为参数，表征围岩因冻结而蓄积在土体中的变形能。并在此基础上，对某地铁沿线的粉质黏土进行系列冻胀试验。经计算得到了不同温度时的冻胀应力、冻胀应变，当冻结温度为-10 ℃时，冻胀应力、冻胀应变和冻胀率分别为0.338 MPa、0.446%、3.13%，计算结果与工程实际需求基本吻合。冻胀潜势可用来描述岩土体的整体冻胀行为，也对丰富和发展冻土理论和冻结法技术提供新的思路和途径。

To predict and control the frost heave behavior of surrounding rock in freezing construction， based on the theory of accumulated deformation energy in elastoplastic materials with expansion tendencies， this study analyzed that frozen soil with expansion tendencies under constraints possessed such deformation energy， which manifested as frost heave stress and frost heave strain when the constraints were insufficient or released. Therefore， this paper proposed the concept and expression of frost heave potential on the basis of the theory of elastic deformation energy. This concept， with frost heave stress and frost heave strain functions as parameters， represented the deformation energy accumulated in the soil due to freezing of the surrounding rock. Based on this， a series of frost heave tests were conducted on silty clay along a subway line. Calculations yielded frost heave stress and frost heave strain at different temperatures. When the freezing temperature was -10 ℃， the frost heave stress， frost heave strain， and frost heave rate were 0.338 MPa， 0.446%， and 3.13%， respectively. The calculated results were in good agreement with the actual engineering requirements. Frost heave potential can be used to describe the overall frost heave behavior of rock and soil masses and provides a new perspective and approach for enriching and developing frozen soil theory and freezing method technology.