| 摘要 |
PROBLEM TO BE SOLVED: To provide a rain water storage structure for a residence capable of reserving rain water falling in a housing site in the ground to effectively use the rain water and, at the same time, reducing the discharge of drainage of the rain water to a drain gutter etc. to reduce load to the drain gutter etc. SOLUTION: After a crushed stone bedrock layer 12 has been formed by constructing and rolling crushed stone having a particle size of 2.5 mm to 13 mm on subgrade soil 11 around a building 2 in the housing site 1, a permeable concrete paving layer 13 serving as 20% to 30% in void is formed thereon. A water suction pipe 14 having a large number of holes in the circumference and in the longitudinal direction is buried in the subgrade soil 11, and an outlet of the water suction pipe 14 is connected to a side ditch 7. COPYRIGHT: (C)2007,JPO&INPIT
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