Patent ID: 8327886
Filing Date: 2012-12-11
Classification: E03F,F16L

Abstract:
1. A conduit repair structure comprising a hollow frame reinforcement body provided with a plurality of ring-shaped reinforcement members arranged in the conduit-longitudinal direction of the conduit at a certain interval, each ring-shaped reinforcement member consisting of a plurality of separate reinforcement members each having fitting sections at a predetermined pitch, and with a plurality of connecting members to mutually connect said plurality of reinforcement members; a plurality of inner face members existing in the conduit-longitudinal direction of the conduit and forming a repaired surface inside the conduit by being mutually connected in the conduit-circumferential direction via the fitting sections of said reinforcement body, wherein the inner face member has a protruding section that is directly or indirectly fitted with the fitting section of said reinforcement member, and a body section that is integrally molded with the protruding section and an inner surface of the body section in the conduit-diameter direction constitutes said repaired surface; and a filling-material layer comprising a curable filling material filled between said plurality of inner face members and an inner wall of the conduit; characterized in that the cross section of the body section of said inner face member has a recessed part, and that a plurality of riblets are formed at least on a bottom of the repaired surface, wherein the riblets have an arcuate cross-sectional shape extending substantially across the body section.