High-speed railway ballastless track roadbed frost heaving deformation test system and method

The invention discloses a high-speed railway ballastless track roadbed frost heaving deformation test system and method. The system comprises a track-roadbed structure model, a roadbed surface temperature control system, a moisture supply system, a high-speed train load simulation loading system and a roadbed monitoring system. The track-roadbed structure model is copied according to the proportion of 1: 1; the roadbed surface temperature control system comprises a cold temperature plate fully covering the surface of the roadbed structure, a refrigerating unit connected with the cold temperature plate through a pipeline, and a temperature control system connected with the refrigerating unit, and a track plate of the track-roadbed structure model is laid on the cold temperature plate; the water supply system is arranged at the bottom of the roadbed to supply constant-temperature water to the roadbed according to actual needs; the high-speed train load simulation loading system comprises a traveling frame, a vi