| 摘要 |
PROBLEM TO BE SOLVED: To provide a drainage mechanism for reducing flowing speed of the rain water in a vertical drainage groove on a slope face below the road side and a water gathering basin in a lateral drainage groove in a small step capable of allowing rain water to flow down to lower vertical drainage groove from an upper vertical drainage groove bypassing via a water gathering basin in a small step to prevent the rain water from overflowing to the surrounding.SOLUTION: An improved slope face drainage mechanism 1 includes a bypass drainage groove 12 connected to a vertical drainage groove 8. An upper end of a bottom face 12d of a vertical bypass drainage groove 12 is connected to the bottom face of a vertical drainage groove 8a disposed on an upper slope face 6a above a small step water gathering basin 11, and the bypass drainage groove 8 is bridged over the small step water gathering basin 11 disposed in a small step 7 to allow the rain water to flow over the small step water gathering basin 11. The lower end part of the bottom face 12d of the bypass drainage groove 12 is positioned on the vertical drainage groove 8b which is disposed on a slope face 6b in a lower small step 7.SELECTED DRAWING: Figure 2 |
