| 摘要 |
PROBLEM TO BE SOLVED: To provide a rainwater permeating roadway curbstone block for permeating rainwater fallen on a roadway surface into the ground by providing a rectangular box-shaped space in the roadway curbstone block and providing a grating lid with a filter function in it. SOLUTION: In an L shape of the roadway boundary curbstone block provided along a boundary of a sidewalk and a roadway, a surface is inclined in such a way that it becomes the same level as the roadway surface and a surface on a roadway side becomes high, the rectangular box-shaped space is provided in a central part of its surface, and a part of a bottom part of the box-shaped space is opened. An opened part becomes an opened part passing through up to a bottom part of the roadway curbstone block, and a bottom part of its opened part is opened toward a sidewalk side and a roadway side. Holes for fixing the grating lid on both side faces on an inner side of the rectangular box-shaped space are provided on both sides at the same level as the roadway surface to let rainwater flowing down from the roadway surface flow into them from a surface of the grating lid. A rainwater guide inclined face is provided on an L-shaped inner side right-angled face to return the rainwater passing through the surface of the grating lid into the surface of the grating lid from the rainwater guide inclined face again. The rainwater permeates into the rectangular box-shaped space through a grating rectangular opening, and the rainwater passing through the opened part in the bottom part of the box-shaped space permeates into the ground through an opening part on the roadway side or an opening part on a sidewalk side. COPYRIGHT: (C)2007,JPO&INPIT
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