Evaluación estructural de pavimentos flexibles construidos en la localidad de Usme utilizando el deflectómetro de impacto o FWD

Abstract

The analysis of the structural behaviors in flexible pavements for the local secondary roads in the city of Bogotá, has not had enough control or importance on the part of the Entities in charge in its service stage, it is possible to notice it in the state of the road network secondary school in the city of Bogotá, where currently 62% of the local road network is in poor or regular state (IDU, 2018); From this indicator it can be deduced that these types of pavements have not been adequately intervened since their construction, presenting different types of deterioration. Thus, for this study an analysis was made to eight (8) roads of the Usme location 5, which were built with conventional pavement structures (granular bases and granular sub-bases) and others that were intervened with recycled materials such as it is the recycled asphalt - RAP. Considering that generally the measurement of the structural capacity of an existing pavement requires destructive processes on the road, which alters the balance of the pavement-subgrade system and produces greater damage when examining or analyzing the pavements; we have recently chosen to perform techniques for high performance tests, known as NON DESTRUCTIVE tests (Non Destructive Test, NDT); Among these tests, the use of the FWD (Falling Weight Deflectometer) deflectometer is highlighted, whose function is to analyze the structural condition of the pavements by interpreting the deflections produced under dynamic loads that simulate the effect of traffic. For this reason, research agencies, such as the American Association of State Highway and Transportation Officials (AASHTO) and the Washington State Department of Transportation (WSDOT), have established mathematical models to correlate (retro calculations or retro-analysis) these technologies to through parameters or indicators of pavement status, by obtaining modules and structural numbers and what is intended to analyze these existing pavements in the location 5 of Usme, which will establish and compare the structural behavior of pavements based on materials recycled with pavements based on conventional materials.