| 摘要 |
The present invention relates to a composition for a rainwater permeable-type upper slab of a rainwater storage tank, the rainwater storage tank using the same, and a construction method thereof. The rainwater storage tank includes: a rainwater permeable-type upper slab; a lower slab for storing the rainwater in the rainwater storage tank by forming the bottom surface of the rainwater storage tank so that the rainwater does not leak from the lower portion; a post fixed to the lower slab to support the rainwater permeable-type upper slab; and a lateral slab forming a wall along an outer edge of the lower slab to connect the lower slab and the rainwater permeable-type upper slab. First protrusions provided on four corners of the bottom surface of the rainwater permeable-type upper slab are inserted in the insertion groove formed on the upper portion of the post, and four first protrusions are inserted in the insertion groove formed on the upper portion of the post, so that four rainwater permeable-type upper slabs are engaged to one post. Therefore, the present invention solves a problem of an existing rainwater storage tank to be constructed on the spot, and since the post, the upper slabs and the lateral slabs are manufactured at a factory in a precast manner, and then are assembled on the spot, it is possible to secure the sufficient inner space. Also, the prevention invention reduces the number of parts, facilitates the assembly, reduces construction periods, and saves construction costs. |
