Methods of Calculating Soil Freezing Depth of High-Speed Railway (HSR) Subgrade in Cold Climate Conditions in People’s Republic of China

Purpose: Methods for calculating soil freezing depth of high-speed railway subgrade are de-veloped given its multilayer structure. Methods: Existing methods calculation have been reviewed, advanced Berggren method HSR and numerically modeling temperature regime on the basis mathematical model moisture migration proposed. The reliability is confirmed by comparison with numerical simulation results based Chinese Russian construction standards. Re-sults: calculations different similar. It reasonable to use calculate system. Numerical makes it possible predict includ-ing change thawing caused climate warming. Practical signifi-cance: To subgrade, advisable method. developed can be used both study logic thermal distribution at project thickness protec-tive layers against a frost construction.