Levantamento das cargas transportadas no modal rodoviário na região do município de Alegrete-rs e sua influência no desempenho de pavimentos flexíveis

Abstract

The Brazillian highways, whether federal, state or local, have serious problems related to their quality. It is a fact that the road network is below the needs of a country like Brazil, which is the seventh largest economy in the world. It is known that the condition of a road is determined by factors related to poor quality asphalt, design errors, excess weight being transported and lack of highway maintenance. Regarding the weight carried has been a great difficulty for monitoring transport vehicles. The difficulty is even greater when the bulk transportation of grains is used, since the vehicle motion causes changes occurring during the loading path. In addition, there is the fact that vehicles used for this purpose collect the beans directly to farmers and travels over untended roads even lead to processing industries. The crop transportation, from processing to improvement, has the highest probability that a load greater than the permissible will be transported. Knowing that, we tried to collect the grain data received in rice cooperatives in the city of Alegrete region. With the data of vehicles used for transportation, it was possible to classify them according to the axis configuration and calculate the excess burden relative to current legal limits in the country. With the help of a computational tool, the SisPav, developed and constantly improved since 2007, a standard highway is scaled by considering only the legal load limits for each axis. The lifetime was set at 10 years and found the thickness of the pavement layers. After that, it moved just a load of axles, now relying on overcharging. A reduction in the life of the floor, which displays the influence of excess load on the performance of flexible pavements with this has been verified.