| 摘要 |
PROBLEM TO BE SOLVED: To provide a rainwater infiltrating device capable of increasing water permeability in the ground, reducing an installation space in the horizontal direction in the ground, installable even in a narrow place, freely deformable in the ground, capable of flexibly coping with a condition of an installation place, and capable of particularly preventing ground subsidence by generation of a city type flood and depletion of underground water. SOLUTION: This rainwater infiltrating device is arranged in a shaft reaching a water permeable layer 9 drilled in the ground, and is made of a water permeable sheet, and is composed of a longitudinally long bag body 2 of filling a glass cullet 3 being a crushed stone-like material inside. COPYRIGHT: (C)2005,JPO&NCIPI
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