Repair engineering method of branch pipe

Abstract

Abstract PURPOSE:To contrive an improvement in operating efficiency by making removal operation of a projected part in a main pipe of a rigid lining pipe unnecessary, by a method wherein the projected part of a liner bag in the main pipe is cured under a state where the projected part is bent outward within the main pipe by an expanding elastic tube. CONSTITUTION:A tubular member 1 is constituted of a liner bag 2 composed of a tubular liner 5 composed of a flexible resin absorbing material 4 coated with a film 3 by impregnating the tubular liner 5 with curing resin by covering the external circumference of the liner bag 2 with an elastic tube 6. When the same is passed through the inside of a guide pipe 8 provided in a standing state within a manhole 7, the tip part is fixed by inverting and water is poured through a water pouring hose 10, the same is moved forward within a time-worn branch pipe 11 in the direction of an arrow while inverting by water pressure. A terminal part of the elastic tube 6 is expanded by receiving the water pressure within a main pipe 12, the projected part 2a of the liner bag 2 is bent outward and stuck close to an inner circumferential surface of the main pipe 12. Then when hot water to be generated by a boiler 14 is supplied within the tubular member 1 through a hot water hose 13, the curing resin with which the liner 5 is impregnated is heated and cured. Then the elastic tube 6 is pulled out from the branch pipe 11 by draining.

Inventors

• 👤 Yasuhiro Wakagi
• 👤 若木　康弘

Bibliographic Details