Electro-optical approach to pavement deflection management

Jeff W. Rish III; Avery D. Adcock; Christopher Y. Tuan; Samuel L. Baker; Hugh W. Welker II; Roger F. Johnson

doi:10.1117/12.213552

7 July 1995 Electro-optical approach to pavement deflection management

Jeff W. Rish III, Avery D. Adcock, Christopher Y. Tuan, Samuel L. Baker, Hugh W. Welker II, Roger F. Johnson

Proceedings Volume 2455, Nondestructive Evaluation of Aging Aircraft, Airports, Aerospace Hardware, and Materials; (1995) https://doi.org/10.1117/12.213552
Event: Nondestructive Evaluation of Aging Infrastructure, 1995, Oakland, CA, United States

Abstract

A prototype continuous deflection device, referred to as a rolling weight deflectometer (RWD), has been developed as a nondestructive evaluation tool for airfield pavements. The system consists of a rigid trailer equipped with specially designed optical triangulation pavement sensors, a high-speed data acquisition system, and a high-pressure tire/load platform assembly. Pavement sensors are mounted on a rigid box beam equipped with an internal sensor system that corrects, in real time, the relative pavement height position measurements for displacements induced in the beam by mechanical vibrations, changes in temperature, or nonuniform dynamic loads at points where the beam attaches to the frame. The device produces continuous deflection profiles that show pavement response to a moving loaded wheel along the path of travel. These deflection profiles, combined with multiple passes along a lane, provide a far more detailed picture of the pavement structural integrity than has ever before been possible, because existing evaluation tools only produce response information at discrete points. Preliminary results show deflections measured by the RWD are in general agreement with the expected pavement response for various loads. A discussion of the device configuration, preliminary data, and potential as a pavement management tool is presented.

Citation Download Citation

Jeff W. Rish III, Avery D. Adcock, Christopher Y. Tuan, Samuel L. Baker, Hugh W. Welker II, and Roger F. Johnson "Electro-optical approach to pavement deflection management", Proc. SPIE 2455, Nondestructive Evaluation of Aging Aircraft, Airports, Aerospace Hardware, and Materials, (7 July 1995); https://doi.org/10.1117/12.213552

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