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

Abstract

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 coated with a surface high-toughness epoxy coating. The structure and the construction method have the advantages that construction is simple, backwater pressure resistanceis high, erosion and abrasion resistance is good and sanitary standards of drinking water are met while the deformation capacity of a PCCP bell and spigot is maintained moderately.

Description

technical field [0001] The invention relates to the field of water conservancy engineering, in particular to a structure, a pipe and a construction method for joints of PCCP pipe sockets. Background technique [0002] Prestressed Concrete Cylinder Pipe (PCCP pipe for short) is a new type of pipe material developed in China in the past ten years. The pipe material is a composite pipe with high strength, high impermeability and high sealing performance, which can be used in long-distance water transmission trunk lines, pressure inverted siphons, sewer pipes of power plant circulating water projects, etc., and is widely used in water diversion projects in my country is widely used in. [0003] The two connecting ends of the PCCP pipe adopt the form of sockets to connect multiple PCCP pipes into a long pipeline. The joints at the sockets will be slightly deformed under the condition of foundation settlement or pressure changes, which may cause joint leakage and long-term Leakag...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the socket structure and construction site conditions, it is difficult to clean the base surface, so it is easy to cause the polysulfide sealant and the interface ring to be not tightly combined, and the phenomenon of gap separation occurs, which brings great harm to the construction quality. big hidden danger

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