DRAINAGE STRUCTURE OF ASPHALT PAVEMENT CONCRETE FLOOR SLAB

摘要

PURPOSE:To enable the maintenance and control of a road and the like by providing a water permeability pervious layer onto an impermeable layer in the vicinity of a catch-basin buried on the top of a structure. CONSTITUTION:A pavement asphalt layer 2 is provided on the floor surface 1 of the top of a structure through an impermeable layer 3, but, at the same time, a catch-basin 4 provided with a cover 6 having a fluid inlet 5 to discharge the water on the surface of the structure is buried on the top of the structure. A water pervious layer 8 of a porous permeable material connected to a pervious hole 7 of the catch-basin 4 is provided on the impermeable layer 3 in the vicinity of the catch-basin 4. The water permeability pervious layer 8 is coated with a covering plate 10. According to the constitution, damages in the vicinity of the catch-basin 4 are reduced, and the maintenance and control of a road can be easily carried out.