Rheological relaxation coupling test system and test method based on multi-layer shearing

The invention discloses a rheological relaxation coupling test system and test method based on multi-layer shearing. The system comprises a test frame, a vertical displacement loading device and a horizontal displacement loading device; the vertical displacement loading device and the horizontal displacement loading device are arranged in the test frame; the vertical displacement loading device is used for lifting the test sample in the vertical direction, applying a relaxation displacement load to the test sample and measuring the vertical displacement and stress of the test sample, and the horizontal displacement loading devices are arranged between the two side walls of the test frame; the two horizontal displacement loading devices which are adjacent up and down are used for applying horizontal loading forces with opposite directions to the corresponding samples, and each horizontal displacement loading device is also provided with a first pressure sensor for recording long-time creep stress of the sample