Análise comparativa dos métodos de dimensionamento empírico e empírico-mecanístico de pavimentos flexíveis

Abstract

The Brazilian highway paving grid is in your mostly very much lagged, because they are in constantly exposure in adverse conditions of weather, precipitation and, mainly, cargo. In this way, appear a new way to oppose this situation, the improvement of methods of pavement dimensioning. This work has as primary objective provide a comparison between the empirical method of flexible pavement dimensioning from DNIT in relation to mechanistic method SisPav from Franco (2007). The methodology initially was developed with simulations in SisPav software, determining the depth of five distinct highways (BR-285, BR-287, BR-290, BR-386, RS-377), versus the variation from resilience modules from the coating and from the base. Following, was made the dimensioning from the same highways by the method of flexible pavement dimensioning from DNIT, and by a comparison study was possible to appreciate disparities between methods. The results confirm that the DNIT method has as primary factor the CBR of subgrade, because all five highways bring forward suchlike depth, although they have a notable cargo difference. In other side, the SisPav software, has as basic function the structural analysis of the set, giving a great notoriety to the cargo in this highway, while considering the resistance of materials to determine each depth, and thus a method of broader scope. The study then allows the aid to draftsman and road agencies in the most appropriate dimensioning of pavements.