Method for preventing underground water seepage of underground heat supply pipe well

The invention discloses a method for preventing underground water seepage of an underground heat supply pipe well and belongs to the technical field of construction. The method solves the problem that underground water permeates into an underground pipe well when an underground heat supply pipe well in the prior art is used. The method comprises the following steps: 1, cleaning the joint of an inner wall and a prefabricated sleeve, spraying oily polyurethane waterproof glue, and then smearing 995 neutral silicone structural adhesive; and 2, after the inner wall and the ground are cleaned, spraying oily polyurethane waterproof glue to wall seams and ground seams, then integrally coating the wall surfaces and the ground with oily polyurethane waterproof paint twice, and the process is completed after drying. The problem of gap water seepage caused by small displacement due to thermal expansion and cold contraction of the heat supply pipeline is solved; waterproof nodes existing in a pipe well chamber are effect