Triaxial test system and method for saturated or unsaturated cycle under freeze-thaw action

The invention relates to the technical field of civil engineering, in particular to a triaxial test system and method for saturated or unsaturated circulation under the freeze thawing effect, the triaxial test system comprises a loading counterforce structure, a constant-temperature cold bath bin, a frost heaving bin, a detection structure and a cold bath box, the constant-temperature cold bath bin is mounted at the lower part of the loading counterforce structure, the frost heaving bin is mounted in the constant-temperature cold bath bin, and the detection structure is mounted in the cold bath box. The upper portion of the loading counter-force structure penetrates through the constant-temperature cold bath bin to be connected with the top of the frost heaving bin, the cold bath box is connected with the constant-temperature cold bath bin and the frost heaving bin, and the detection structure is connected with the loading counter-force structure, the frost heaving bin and the constant-temperature cold bath b