Um modelo de avaliação da evolução geométrica das patologias em vias não pavimentadas: aplicação ao caso do Município de Aquiraz

Abstract

This Thesis focuses on intemperate weather influence (rain, wind, etc.), traffic, soil type and relief in the reduction of unpaved road level of service. It treats on the evolution of distress presents in unpaved roads. It intends to improve the performance evaluation methodology for surface conditions, proposed by CORREIA (2003), the ALYNO Method. It was chosen the county district of Aquiraz,Ceará, Brazil, as a case study in the development of this thesis, because of its social and economical characteristics, its road network and the small distance to Fortaleza city. It was developed a mathematical model to forecast performance evaluation model using topographical survey of unpaved roads, which resulted in the modified method entitled ALYNOMO. Main performance evaluation methods of surface conditions for unpaved roads are also studied. From the case study, several considerations are made on the geometric evolution of the distress according to usefulness of the studied branch. This research contributes for the improvementof the unpaved performance evaluation process and the ALYNO Method, proposing a model to forecast the performance for regular and appropriate unpaved roads. It isimportant to emphasize the need of the rational maintenance of this kind of road.