Structure for PCCP bell and spigot joint, pipeline and construction method

The invention relates to the field of water conservancy projects, in particular to a PCCP bell and spigot joint structure and a construction method thereof. Firstly, the interior of a bell and spigotjoint is cleaned, the joint is coated with SK primer, and then a plastic sealing material with the width the same as that of the joint is placed into the joint; secondly, the plastic sealing materialis compacted, so that the lower space in the joint is full of the sealing material, and the sealing material and the joint are closely combined; the sealing material is filled with epoxy putty to be flush with the surface, then the surface of the epoxy putty is coated with an elastic polyurethane/polyurea coating or transparent adhesive tape adheres to the surface of the epoxy putty to serve as anisolation layer, and the upper side of the isolation layer is coated with a bottom high-toughness epoxy coating, wherein the epoxy coating is 10-20 cm wider than the isolation layer; a gum dipping glass fiber belt is laid and