| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve safety and reliability of buried power transmission network by quickly coping with any damage found in a part of a returning path pipe.SOLUTION: A returning path pipe is repaired by a first step for removing a damaged rubber pipe from an intermediate connection member, a second step for applying a sealing material on an outer peripheral surface of a repair pipe path attachment part in the side from which the rubber pipe is removed, a third step for forming a cut in a prescribed length on an end of a soft hose having flexibility and water-impermeability and capable of being stored in a flat state and externally inserting the soft hose until the end of the soft hose exceeds a center side end of the repair pipe path attachment part, a fourth step for attaching a first fastening metal fitting on an outer peripheral surface of the soft hose and fastening it to the repair pipe path attachment part with prescribed torque, a fifth step for outwardly folding back the soft hose at the center side end of the repair pipe path attachment part, and a sixth step for attaching a second fastening metal fitting on an outer peripheral surface of the folded back part of the soft hose and fastening it to the repair pipe path attachment part with prescribed torque.</p> |
