| 摘要 |
PROBLEM TO BE SOLVED: To provide a depression repairing method for repairing a depressed part of a buried pipe in a low-cost and simple method. SOLUTION: A depression repairing machine 20 is prepared having a correcting member 60 that is expansible installed on the outer circumferential side. In the buried pipe 10, the depression repairing machine 20 is moved to be guided to the depressed part 14. At the depressed part 14, the depression repairing machine 20 is expanded to press the correcting member 60 to the depressed part 14 to expand it. The correcting member 60 is kept at the depressed part 14 as it is expanded, and the depression repairing machine 20 is contracted to leave the correcting member 60 to move in the buried pipe 10. COPYRIGHT: (C)2005,JPO&NCIPI
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