Reduktion der Frosthebungen bei der künstlichen Bodenvereisung

Decreasing frost heaves of artificial frozen soils by intermission freezing.

For decreasing the frost heaves of artificially frozen soils the influences of temperature gradient, its changes as well as the amplitude and period of changing freezing temperature on the one-dimensional frost heaves of fine-grained soils were investigated by experiments in the laboratory. During the frost penetration into the fine-grained soils the frost heaves due to the formation of the final ice lens under thermodynamic stationary condition is decisive. The gradient of temperature influences strongly the depth of frost penetration but only little the total frost heave. Cyclical changes of the freezing temperature can confine the growth of the final ice lens and thereby the frost heave decreases. However, the cyclical changes of the freezing temperature before the formation of the final ice lens can cause a heavy frost heave. For decreasing frost heaves the amplitude und period of changing the freezing temperature must be controlled properly.