WATER PROOF CONSTRUCTION METHOD FOR TUNNEL USING UNION WATER PROOF SHEET

摘要

A waterproof construction method for a tunnel using composite waterproof sheets is provided to restrict cavity and crack of the tunnel after concrete lining construction by integrating waterproof sheets and reinforced nonwoven fabric with the shotcrete constructed surface in the tunnel. A waterproof nonwoven fabric(16) welded by point welding parts is formed at the other surface of a waterproof sheet(12) in which one side is formed with a reinforced nonwoven fabric(14) to prepare for composite waterproof sheets(10). The composite waterproof sheets are bonded on a shotcrete constructed surface(T) to face the composite waterproof sheets toward the shotcrete constructed surface. A waterproof coating film(20) is formed on the reinforced nonwoven fabric. The concrete linings are constructed below the composite waterproof sheets. Ends of the concrete linings are connected by extended connectors(220).