Prefabricated manhole structure and construction method for the same
(10) JP2023086190
(22) 10.12.2021
(43) 22.06.2023
(57) To provide a new construction method for a prefabricated manhole which fundamentally reviews a conventional prefabricated manhole structure, and reduces the size.
Solution: A prefabricated manhole structure is composed of a plurality of concrete segments that are mutually connected. The prefabricated manhole structure includes a section 21 for lifting work having a bottom part 12, a wall part 13 and a top part 14, and a tunnel section 31. The section 21 for the lifting work includes a lid support cylinder part 49 for a hole for lifting. The tunnel section 31 is arranged between right and left sections 21 for lifting work. The height from the bottom part 12 and the top part 14 of the tunnel section 31 is lower than the height of the top part 14 of the section 21 for the lifting work, is lower than the height of the conventional top part 14 of (B), but a distance between the ground surface and the top part 14 of the tunnel section 31 is substantially equal to the conventional distance between the ground surface and the top plate 14 of (B).
(71) Sumitomo Densetsu Corp.; Tatsuno KK; Fujimura Crest Co. Ltd.
