Ground stress-water head collaborative adjustable vertical shaft freezing model test device and test method thereof

The invention relates to the field of model tests in the artificial freezing process, in particular to a ground stress-water head collaborative adjustable vertical shaft freezing model test device and a test method thereof.The device comprises a model test box, a water head height adjustable water source box, a small spiral freezer and a bidirectional loading device.The test method comprises the specific steps that S1, the test device is connected; s2, loading samples in the model test box in a layered manner, and synchronously burying a monitoring system; s3, a small spiral freezer is installed; s4, adjusting the bidirectional loading device; s5, providing a water source; s6, starting a freezing test; s7, applying an external load; s8, when the shaft wall of the vertical shaft deforms excessively or is damaged, the test is stopped; through an indoor model test method, the deformation characteristics of the frozen well wall in the sandy soil stratum vertical shaft freezing construction process are simulated,