Análise das deformações permanentes do pavimento asfáltico em um trecho da avenida Pedro Ludovico em Anápolis – Goiás

Abstract

This study investigates permanent deformations in asphalt pavement, focusing on the sinking of wheel tracks, in a section of Pedro Ludovico Avenue, in Anápolis (GO), due to the intense traffic of heavy vehicles. Quality paving is crucial for the efficiency of cargo transportation, especially in productive regions such as the Midwest. The focus of this study is to analyze plastic and consolidation sinking, which occurs due to the continuous action of transient loads on the pavement. The methodology that was used follows the DNIT 433/2021- PRO standard, which standardizes the use of a measuring lattice to identify deformations in asphalt pavement. However, this tool becomes inaccessible to our study due to its high added value. Faced with this challenge, we propose a new methodology to measure permanent deformations, using an optical level used in topography. Furthermore, a low-cost truss was built, respecting the truss measurements established in the standard, to collect data and compare them with the results obtained using the new methodology. The research delimits a 200- meter stretch on Pedro Ludovico Avenue, where measurements are taken every 10 meters of road subsidence, using high-precision instruments. Furthermore, a low-cost truss was built, respecting the truss measurements present in the standard, to collect data and compare them with the results obtained using the new methodology. The research delimits a 200-meter stretch on Pedro Ludovico Avenue, where measurements are taken every 10 meters of road subsidence, using high-precision instruments. In addition, the field data collection is accompanied by statistical analyses that allow the calculation of the mean, standard deviation and variance of the deformations. When using the low-cost truss, the values ​​obtained for these three variables were: 6.35 mm, 0.78 mm² and 0.88 mm respectively. However, the data collected with the proposed topography tools obtained values ​​of 6.65 mm of mean, 0.89 mm² of variance and 0.94 mm of standard deviation, showing a difference of less than 0.5 mm for the results of the requested variables. Given the small difference between the data collected when using the two methodologies, the use of topography material to measure subsidence in wheel tracks was efficient and the results of the mean, variance and standard deviation obtained by this research may support future interventions and contribute to improving road maintenance, increasing pavement durability and user safety.