TY JOUR TI Mathematical Modeling of the Process of Soil Freezing of Railway Subgrade in Cold Climate Con-ditions KW Soil freezing KW temperature mode KW moisture migration KW numerical modelling KW railway subgrade JO Proceedings of Petersburg Transport University AU Van, S.. AU Kolos, A.F. AU Petryaev, A.V. PY 2022 IS 19 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"