| 摘要 |
PROBLEM TO BE SOLVED: To provide a removing means for sediment or the like accumulated in a tank for storing rainwater, and provide a means for utilizing a part of the tank space as a space for piping and wiring. SOLUTION: In this rainwater storage-permeable tank with plastic moldings piled up and filled in an underground space, a tank bottom part is formed as an inclined face, and a ditch is provided at the lowermost part of the inclined face. A part of the plastic moldings piled up in the tank is removed to form a space, and piping and wiring are disposed in the space.
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