TY JOUR TI Methods of Calculating Soil Freezing Depth of High-Speed Railway (HSR) Subgrade in Cold Climate Conditions in People’s Republic of China KW Soil freezing depth KW HSR subgrade KW advanced Berggren method KW numerical simulation KW temperature regime JO Bulletin of scientific research results AU Van, S.. AU Kolos, A.F. AU Petryaev, A.V. PY 2023 IS 2023 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"