Método nacional de dimensionamento de pavimentos - medina, avaliação da duplicação da AL-145

Abstract

This paper studies the National Method of Sizing of Pavements - MeDiNa- with the objective of evaluating the duplication project of the highway AL-145. This new proposal of pavement calculation aims to replace the current empirical method - process used in tne project in evaluation- for a mechanically empirical. Initially, there are presented the processes related to the dimensioning by the empirical method currently used. In sequence, a detailed approach is made to MeDiNa, addressing the fundamental processes that govern its mechanically empirical purpose, the damages that occur in a pavement structure and the process of modeling the mechanical properties of the materials and the performance models of the pavement in fatigue and permanent deformation. The characterization of the necessary materials to the application of MeDiNa in the case study was obtained through the specialized bibliography. The results indicated that the pavement structure complies with the maximum information limits allowed by MeDiNa, while still referring to a structure with the thinnest densities. This opportunity for optimization has also been translated into pecuniary terms. The MeDiNa program proved to be versatile in analytically analyzing a solicitation for trafic and the structural behavior of the pavement being promoted in the plan of the life of the highway.