| 摘要 |
The present invention relates to a method for recovering water permeability of a pavement surface layer of drainage or water permeable pavement by removing clogging of air voids in the pavement surface layer, comprising the step of: discharging water jet at a high pressure from a nozzle onto a surface of the pavement surface layer so that the surface of the pavement surface layer is within a droplet flow region of the water jet and that droplets and globules in the droplet flow region enter the air voids in the pavement surface layer to cause water hammer which removes the clogging of the pavement surface layer.
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