After passing the inspection of the welding process of the directly buried prefabricated insulation pipeline, the joint repair construction work shall be carried out without affecting the construction. Firstly, determine the basic parameters and construction regulations for the joint repair of directly buried prefabricated insulation pipes to ensure that there are no problems with the construction quality. The construction process of directly buried prefabricated insulation pipe joint repair is suitable for selecting conditions above 15C and humidity below 85%. Low temperature is not conducive