2023 Volume 18 Issue 2 Pages 139-150
When the ground freezes, the ground expands due to frost heaving. In order to predict this amount of frost heave, in Japan, an empirical formula expressing the freeze expansion rate by the freezing rate is used. In other countries, the amount of frost heave is predicted using an empirical formula that states that the rate of water absorption into the freezing front is proportional to the temperature gradient in the partially frozen region. Here, experiments were conducted with the freezing rate and the temperature gradient as independent parameters, and it was shown that it is difficult to express the frost heaving rate only by the freezing rate and the temperature gradient in the partially frozen region. On the other hand, it was found that the frost heaving rate can be expressed as a linear expression using the freezing rate and the temperature gradient as parameters. A new formula for predicting frost heaving rate is proposed for ground freezing under conditions with various freezing rates and temperature gradients.
