FROST HEAVE DUE TO ICE LENS FORMATION IN FREEZING SOILS .2. FIELD APPLICATION

An operational model for estimation of frost heave in field where stra tified soil profile appears is presented. The model is developed from the research model described in part B. Soil layers are first classifi ed into frost-susceptible layers (FSL) or non-frost-susceptible layers (NFSL). In an FSL, both heat flow and water flow are considered and i ce lensing can occur. In a NFSL, only heat flow is possible and no ice lensing is allowed. The governing equations for heat and mass transfe r are established for the time period when the frost front is moving w ithin FSL. Capillarity and unsaturation are also considered. The opera tional model is verified by field measurements of heave amounts. Examp les of application are given.