FRP Light-Cured Installation Pipe Lining Method for Rehabilitation of Damaged Installation Pipes
Using materials with durability equal to or greater than that of the main rehabilitation pipe (50-year standard) and high adaptability to bends in existing installation pipes, the damaged installation pipe is rehabilitated without excavation.
This construction method rehabilitates damaged installation pipes without excavation. It uses a cylindrical acid-resistant glass fiber fabric impregnated with light (ultraviolet) curable resin (vinyl ester) in the factory, covered with a light-blocking film after special air degassing, to create an FRP installation pipe liner (BBG). This FRP installation pipe liner (BBG) is mounted on a storage drum of a dedicated construction machine and is inverted or pushed into the existing pipe from the manhole. Compressed air is sent into the liner to expand it, and a light curing device (UV train) is inserted into the liner. After confirming the presence or absence of abnormalities inside the liner with a TV camera attached to the tip, the UV lamp is turned on, and the UV train is pulled at a specified speed from the main pipe side, curing the liner with light to form a strong FRP pipe.
