| 摘要 |
PROBLEM TO BE SOLVED: To provide a rainwater storage tank which can simplify field work as well as shorten an on-site construction period and is less affected by unevenness.SOLUTION: A storage material 13 is manufactured by assembling resin blocks in a factory. A cladded storage material 25 is manufactured by cladding all circumferential surfaces of the storage material 13 with cladding materials 21. Foam layers are formed on all circumferential side faces 26 of the cladded storage material 25 by: enclosing a circumference of the side faces 26 of the cladded storage material 25 by formwork 43 through spacers 31 put between the side faces 26 of the cladded storage material 25 and the formwork 43; and injecting foaming resin material between the cladded storage material 25 and the formwork 43. Additional foam layers which are connected to the foam layers on the side faces of the cladded storage material 25 are formed on surfaces of a top face and a bottom face of the cladding material 25 by spraying the foaming resin material thereon. A rainwater storage tank, where the storage material 13 is cladded with the cladding materials 21 as well as the foam layers, is manufactured inside the formwork 43. Accordingly, the formwork is removed. |
