Patent ID: 6626609
Filing Date: 2003-09-30
Classification: E02D,E03F,Y02A

Abstract:
A rain-water storing permeation structure comprising:a water-shielding layer placed in a recessed section in the ground, said recessed section having a bottom and outwardly slanted side surfaces; a water-storing layer comprising multiple layers of water-storing blocks which are made of a hard resin foam member having a specific gravity lower than water, wherein multiple water-storing blocks are placed side by side and one upon another using connecting members having claws, and an upper layer of said multiple layers comprises more water-storing blocks than does a lower layer, each block having an inner space and rigid walls, the water-storing layer being placed inside the water-shielding layer; a lid layer formed on the water-storing layer, comprising a water-permeable layer made of a water-permeable material; and a surface layer covering said lid layer and being leveled substantially with said ground, said surface layer having an area wider than that of the bottom of the recessed section and maintaining its level by resisting the buoyancy of the water-storing layer when storing water therein.