Avaliação do impacto de defeitos no pavimento no entorno de poços de visita no conforto dos usuários da via por meio da medição da aceleração vertical

Abstract

Infrastructure networks are fundamental to maintaining the functioning of a country and ensuring its economic and social development, and one of the main networks is the road network. In urban areas, it is common to allocate other networks buried under roads, especially those for sewage collection and rainwater drainage, but this can generate some points of conflict between the components of these networks. In this work, the relationship between the manhole covers of underground networks and the surface of the nearby pavement stands out, with a focus on the difference in level between these elements, as well as its relationship with the level of comfort of urban road users. This analysis was carried out by conducting an experiment in 20 manholes distributed across 4 routes in the urban perimeter of João Pessoa, PB, Brazil. The experiment involved measuring the slope of the manholes at three points and measuring the vertical acceleration inside a car, using a smartphone. The collected acceleration data were corrected to not consider the acceleration due to gravity, were treated by a moving average filter and the RMS values of the weighted vertical acceleration were calculated, based on the procedure described in the ISO 2631-1-1997 standard and the range of adopted reference time of 0.2 seconds.. After that, the degrees of comfort relative to the determined RMS values were evaluated. Thus, it was possible to determine a relationship between the greatest module of the unevenness measured in the manholes, the RMS value and the road user's comfort level with an exponential equation of R² = 0.91 and the assembly of a table relating these factors. It is concluded that, although the applied method has many limitations and is subject to several sources of inaccuracy, it can be used to evaluate the level of comfort on a road, as a low-cost mechanism in the management of urban roads and in the development of other projects, if corrections are implemented.