Foundation pit frost heaving prevention system based on geothermal energy active heat supply

The invention relates to the field of rock-soil foundation pit supporting engineering, and provides a foundation pit frost heaving prevention system based on geothermal energy active heat supply, which comprises a heat storage device, a supporting pile heat removal device and a wall surface heat exchange device, and a liquid supply pipeline and a second heat exchange pipeline are both connected with a heat storage water tank; under the action of the circulating water pump, fluid circulates in the heat storage water tank, the first heat exchange pipeline, the liquid supply pipeline and the second heat exchange pipeline, the fluid obtains heat from soil at the bottom of the support pile, and under the action of the circulating water pump, the heat obtained by the fluid is transmitted to the heat storage water tank; and then fluid circulation in the second heat exchange pipeline exchanges heat with air on the side of the foundation pit to release heat, so that the temperature Tm of the side surface layer of the