Estudo de segmento na Rodovia BR-230/PB com aplicação do novo método de dimensionamento de pavimentos asfálticos - MeDiNa.

Abstract

It is clear that periodic structural assessments are necessary for better management and prioritization of investments in road maintenance and restoration. These assessments can be carried out based on non-destructive surveys that, after careful analysis, allow the elaboration of recovery and reinforcement projects for the roads. Currently, these analyzes in the structural conditions of pavements are made by retro-analysis of the resilience modules through deflection basins measured in the field at different points of the road. Retro-analysis is based on mathematical models based on the theory of elasticity and is implemented in computer programs that help in pavement engineering. This research aimed to analyze the structural performance of three homogeneous stretches of the BR-230, between Campina Grande and Ingá, in order to obtain the resilience modules and analyze the results. In the research, the software BackMedina and MeDiNa were used, which are programs for the retro-analysis of the resilience modules through the deflection basins determined in the standard Falling Weight Deflectometer (FWD) test and sizing of a new pavement or reinforcement sizing, respectively. Through the evaluation carried out in the chosen segments, it was verified that the main cause of deterioration is the incompatibility of the structure's rigidity. The reinforcement intervention analyzed by MeDiNa proved to be inefficient when the CAP 50/70 was used, as the program was unable to perform the dimensioning as it exceeded the 15cm thickness limit. The reinforcement solution using the AMP 55/75-E proved to be satisfactory, satisfying the functional requirements for the design period.