| 摘要 |
PROBLEM TO BE SOLVED: To provide an earthquake resisting construction method forming an annular space part from the inside of the wall of a manhole using a small chamber type concrete cutting machine sized (shaped) to be carried in and out of an entrance of the manhole or the like regardless of the wall thickness of the existing manhole or the like without a possibility of sediment, underground water, or the like flowing into the manhole during improvement work after forming the annular space part around a pipe body. SOLUTION: A cutting line 3 is formed in a wall surface A-1 around the pipe body B to surround the pipe body B from the inside of the wall of the existing concrete manhole A to which the pipe body B is connected in rigid structure, so as to leave a fragile remaining wall part 1 on the outside of the wall without reaching the outside of the wall of the manhole A, and a wall surface member is annularly cut to form the space part 2. In this annular space part 2, an aseismatic joint unit C is mounted between the outer peripheral surface of the exposed pipe body B and the inner peripheral surface of the space part 2. COPYRIGHT: (C)2007,JPO&INPIT
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