Análise do dimensionamento de um pavimento asfáltico pelo Método do DNER e o Método de Dimensionamento Nacional com orçamentação pelo Novo SICRO

Abstract

Considering that the most commonly used sizing method in Brazil is currently empirical and often considers several simplifications and generates erroneous results, it was necessary to search for a new sizing method that would generate reliable answers. In this sense, the study of the empirical-mechanistic methodology was started, which takes into account the behavior of the structure throughout its useful life. Based on this methodology, the National Dimensioning Method was developed, materialized in software called MeDiNa, which was presented in 2017 by the National Department of Transport Infrastructure (DNIT). Also in 2017, DNIT released the New System of Reference Costs of Works (SICRO), a system of cost composition with the aim of improving and facilitating budgeting. Considering these important technological advances in the area and with the objective of continuing the work carried out in the disciplines of Highways I and II, this study sought to analyze and compare the two sizing methods to then budget the structures for the New SICRO. To do so, first, two structural alternatives were determined and, through the DNER Method and the National Sizing Method, the pavement was dimensioned. Then, the budgets of the alternatives for the pavement structure were made through the New SICRO. Lastly, a sensitivity analysis was elaborated through the variation of the design period and the level of reliability. By means of this analysis, it was concluded that the cost per N per kilometer implanted is inversely proportional to the project period and that, for the same duration, the area cracked in the pavement is proportional to the reliability. In general, it is understood that the empirico-mecanicista method reduces the waste of materials and, consequently, of public resources, since it allows a dimensioning more coherent to the necessary one for the imposed traffic.