Heat collection bag, device and method for solidifying and filling calcium sand foundation

A device for solidifying and filling calcareous sand foundation, comprising:

• a solar energy collection bag, comprises a transparent heat permeable part (17) and insulation material, the insulation material comprises a heat absorbing layer (18), an insulation layer (19), and a fabric layer (20), wherein the heat absorbing layer (18), the insulation layer (19), and the fabric layer (20) are fixedly composite from top to bottom into one body;
• the edge of the transparent heat permeable part (17) is the first edge, and the edge of the insulation material is the second edge;
• the transparent heat permeable part (17) and the insulation material are combined into one through the first and second edges, forming a containment space between the transparent heat permeable part (17) and the insulation material, so that the medium contained in the containment space can be heated by solar energy;
• a water intake component that is connected to the capacity space of the solar collector bag (9), so that seawater obtained through the water intake component can be input into the capacity space of the solar collector bag (9), wherein the solar collector bag (9) utilizes solar energy to heat the seawater input into the solar collector bag (9), obtaining the heated seawater;
• and
• a water injection component that is connected to the storage space of the solar collector bag (9), and through the water injection component, heated seawater can be injected into the loose calcareous sand layer, reducing the solubility of calcium carbonate in the loose calcareous sand layer and continuously generating calcium carbonate precipitation in the pores of the calcareous sand layer.