Duct repairing material, repairing structure, and repairing method

A repairing material for use in repairing an existing conduit, comprising:

• a reinforcing body having a hollow skeleton structure extending substantially along the inner surface of the existing conduit, the reinforcing body being assembled from a plurality of circumferentially divided ring-like reinforcing members each of which has a plurality of fixing parts in its inside;
• and
• a plurality of inner face bars each of which has a smooth surface and which are fitted into the fixing parts of said reinforcing members to form the inner surface of the conduit.

A repairing structure for a conduit, wherein

• a hollow skeleton-like reinforcing body extending substantially along the inner surface of the existing conduit is placed in the existing conduit, wherein
• a plurality of inner face bars which are continuous in the lengthwise direction of the existing conduit are attached to the inside of said reinforcing body, the inner face bars being disposed to form a tubular form extending along the lengthwise direction of the existing conduit, and wherein
• a curable infilling is provided to fill in the gap between the inner face bars and the inner surface of the existing conduit.

A repairing structure for a conduit, comprising an end structure of the repairing material through which the grouting material is injected into the gap formed between the inner surface of the existing conduit and the repairing material laid inside the conduit, wherein

• both ends of a tubular member formed of a water permeable material are fixed by pressure by means of a hollow diametrically-expansible member corresponding to each end onto the inner surface of the longitudinal end part of the repairing material and the inner surface of the existing conduit at a position a predetermined distance away from the end part, and
• an injection opening for grouting material is provided near the end part of the repairing material or on said tubular member.