Contribuição para a avaliação da irregularidade longitudinal de pavimentos com perfilômetros inerciais. / Contribution for pavements longitudinal roughness evaluation with inertial profilers.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

This research includes de analysis of several aspects regarding longitudinal pavement roughness evaluation, more specifically when these evaluations are done using an inertial profiler - kind o equipment that is also an object of this study. The analysis is initiated with the comprehension of the historical evolution of this type of functional evaluation that not only encloses equipment, but also the methods and the roughness indexes more common in Brazil. The main stages throughout of the development of the inertial profiler used on this research, its technical and operational features, the results of the tests that proved its good functionality and also the comparison of the results obtained with a response type roughness meter were incorporated. The research is completed with a series of analysis regarding the methods more appropriate for the verification of inertial profilers functioning, including important recommendations for the choice and measurement of reference profiles, indispensable in such verifications. Important aspects concerning profiles processing for the QI determination were verified and concluded for reduction of the displacement between the profile elevations for 25 cm. The uncertainties of QI and IRI indexes obtained from inertial profiles measurements were also researched and at this opportunity it was verified that value of QI is affected by long wavelengths that usually are not considered roughness. The correlation between QI and IRI indexes were widely evaluated using real data of hundreds of kilometers of highways profiles, and evidenced the existence of a great dispersion in such correlation what indicates that the best recommendation is not to correlate them. Finally, this research leaves as a legacy the proposal of a first draft for a Brazilian standard for this type of roughness evaluation that accumulates most of the judgments presented here.

ASSUNTO(S)

avaliação de irregularidade gerência de pavimentos functional evaluation inertial profiler road roughness rodovias perfilômetro inercial pavement

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