| 摘要 |
PURPOSE:To simplify the manufacture and installation of a ferroconcrete structure having curved parts by a method that the structure is made so as to have the curved parts stand upright and is installed in a predetermined position by turning said structure in the water. CONSTITUTION:In order to make curved walls 8 stand upright, side wall 10 facing opposite to said curved walls is manufactured so that it is positioned upward and downward of said walls. Then, a through hole of an upper wall 1 side is closed, and water is introduced into the through hole of a lower wall 2 side. When the wall 2 side becomes heavier than the wall 1 side, a difference in buoyancy is produced, and a ferro-concrete structure becomes easier to turn, which leads to a regular posture that the wall 1 side and wall 2 side are positioned upward and downward respectively. Thus, the structure can be made into the desired shape accurately in a stable condition. Moreover, the structure can be easily changed to the regular posture from any undesired posture even if it is a large and heavy one. |
