Abstract
We examined the possibility of improvement in a porous asphalt pavement for runoff control by the installation of a infiltration pipe under the pavement. From the result of many infiltration experiments at our experimental rainfall infiltration facilities, it made clear that the infiltration rate through the porous asphalt pavement is influenced by the volume of pore and permeability of the pavement and if storm water puddled on the surface of the pavement then rainfall infiltration becomes fast. And the construction of the infiltration pipe under the porous asphalt pavement will improve the final infiltration rate of the infiltration pavement about 5mm/hr. Furthermore, we build up a model which can simulate rainfall infiltration and runoff at the infiltration pavement with the infiltration pipe based on infiltration process in the pavement and infiltration pipe. By this model, we prove that the construction of the infiltration pavements with infiltration pipes is one of effective storm runoff control facilities in urban area.
