| 摘要 |
PROBLEM TO BE SOLVED: To provide a draining structure for road surface using a block which can be efficiently formed by use of a form having a simple structure in a draining structure for a water-permeably paved road surface and a draining concrete block. SOLUTION: A drainage channel is formed of a U-shaped sectional water-impermeable channel block 2 buried and arranged under the road surface and a water-permeable concrete or water-permeable asphalt-made top plate block 2 placed to cover the upper surface opening. The upper surface of the water-impermeable layer 20 of the road surface is set higher than the side wall upper edge of the channel block 2, the upper surface of the water-permeable layer 21 of the road surface is in the same level as the upper surface of the top plate block 3, and the edge of the water-permeable layer 21 is in contact with the side surface of the top plate block 3. The water carried in the water-permeable layer 21 of the road surface falls into the drainage channel 4 from the side surface of the top plate block 3. The water falling from an inclined surface on the road side is carried to the drainage channel 4 from the upper surface of the top plate block 3. Accordingly, the draining block 1 need not have a water guide hole as in the past on the side surface. COPYRIGHT: (C)2004,JPO
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