Análise comparativa do dimensionamento de estrutura de pavimento: método do DNIT e o método MeDiNa - estudo de caso em solo de subleito tipo A-2-6

Abstract

This work proposes a comparative analysis of the sizing of pavement layer thicknesses, using the DNIT and MeDiNa methods. The study focuses on granular soil A-2-6 in the municipality of Farias de Brito, Ceará, aiming to contribute to the practical understanding and optimization of pavement design. It begins with a detailed geotechnical characterization of the soil, covering granulometry tests, consistency limits and other parameters. Subsequently, the DNIT and MeDiNa methods are applied, considering local variables such as traffic, weather conditions and subgrade characteristics. This work highlights the importance of the triaxial test in the geotechnical characterization of soil A-2-6, reinforcing its relevance for sizing using the MeDiNa method. The triaxial test provides crucial data on the mechanical properties of the soil, such as shear strength and deformability, essential for the accuracy of the MeDiNa method. The inclusion of the triaxial test enriches the characterization of the soil, allowing a more in-depth understanding of its behavior under different load and confinement conditions. These data are fundamental to calibrate and validate the parameters used in the MeDiNa method, considering the specific response of the A-2- 6 soil. The analysis of the results of the triaxial test directly contributes to the reliability of the design, influencing the estimates of resilient modulus and other properties that impact the calculated thicknesses of the pavement layers. In this way, the triaxial test emerges as a valuable tool for obtaining precise and contextualized data, optimizing the application of the MeDiNa method in paving projects. Comparison of calculated thicknesses highlights differences and similarities between methods, providing a critical view of the approaches used.