Estudo da capacidade de infiltração em pavimentos intertravados de concreto

Abstract

The urban growth has provoked significant impacts caused by the cities’ infrastructure. Urban drainage is one of the affected systems. The growing impermeability of the soil reduces the water infiltration and increases the runoff, gradually overloading drainage devices. Because of it, sustainable drainage measures appear, not convencional techniques that respect hydrological cycle, promoting greater infiltration, lower surface runoff speed, reduce peak flow and storage of a portion of the rain volume to gradually return it to the rain network, resulting in a reduction in peak flow. This project analyzed one measure in particular, the interlocked concrete pavement. Two modules of permeable pavements lined with concrete blocks were built: one in the conventional way and the other one with hydraulic and mechanical dimensioning. The infiltration rate of the two pavements were evaluated in situ through the test described by NBR 16416 (ABNT 2015) and the dimensioned floor storage capacity. Through the verified infiltration analysis, the pavements have a medium permeability degree, similar to gravel sand, clean sand and thin sand. It was found that the dimensioning does not influence the infiltration rate, but it is relevant to the retention capacity, which makes it work as a reservoir pavement. Both pavements proved to be efficient in reducing runoff, however, when correctly executed the interlocked concrete pavement combined with the conventional urban drainage system becomes a good solution to minimize the urbanization impacts.