| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for repairing an existing conduit capable of smoothly inserting a new conduit in a method for repairing the existing conduit by interposing an intermediate cylindrical body between the new conduit and the existing conduit, and capable of stabilizing quality of a regeneration conduit after repairing. <P>SOLUTION: In this method for repairing the existing conduit, before introducing the new conduit 20 into the existing conduit 10, the curable intermediate cylindrical body 12 having at least the outside diameter enabling its entire periphery to contact with an inner peripheral surface of the existing conduit 10 in the state of being enlarged in the diameter is introduced into the existing conduit in an uncured state (intermediate cylindrical body introduction process), the new conduit 20 is inserted into the intermediate cylindrical body 12 so that the outer peripheral surface is brought into close contact with the inner peripheral surface of the intermediate cylindrical body 12 (new conduit insertion process), and a proceeding smoothing part (projecting member 14, etc.) for improving proceeding smoothness of the new conduit 20 in the intermediate cylindrical body 12 in the new conduit insertion process is provided on one of the inner peripheral surface of the intermediate cylindrical body 12 and the outer peripheral surface of the new conduit 20. Thus, smoothness of proceeding of the new conduit can be achieved, and quality of the intermediate cylindrical body as a filling function member in a gap between the new conduit and the existing conduit can be improved. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
