FLOOR RESTRUCTURING PROJECT FOR FEASIBILITY OF WEIGHING IN MOTION SYSTEMS – WIM (Atena Editora)

Abstract

Given the economic expansion in Brazil, there was an increase in the volume of cargo vehicle traffic on the highways, which may be associated with the early wear and tear of pavements. Aiming at monitoring, studies are being studied for the implementation of direct and automatic inspection through high-speed weighing-in-motion (WIM) systems, considering the guideline speed of the lane. WIM systems rely on sensor technology, cameras, scanners, among others, responsible for identifying vehicle loads and their distribution by axle during displacement, in addition to monitoring damage caused to the pavement. So that this automation did not depend on the construction of new highways, the objective was to implement the system on existing highways and verify its functionality, a decision taken mainly because of the cost of a paving work. The project for the installation of WIM sensors, a cooperation between the National Department of Transport Infrastructure and the Transport and Logistics Laboratory of the ‘’Universidade Federal de Santa Catarina’’, took place on a stretch of BR-101 South. Monitoring of the test lane was maintained for approximately 5 years, however, the highway presented premature defects and required constant restoration, which made it difficult to acquire data from the WIM system. Thus, the need for restructuring the track for accuracy in data acquisition was designed considering two constructive options. An alternative in continuously reinforced concrete and another in thick asphalt pavement with a 30/45 binder that were implemented in the WIM test area, keeping the rest of the road free of interventions. This way, existing highways can be optimized in certain areas to compose these systems and, with that, perform the function of supercharge inspection. The test track features two restructuring projects, one on a continuously reinforced concrete pavement and the other on an asphalt pavement using a conventional 30/45 binder.