As some deep distresses exist in pavement structures, ground-penetrating radar (GPR) reflected waves will vary at interfaces and defects. Aimed at detecting the distresses in terms of position, severity and degree, electromagnetic forward simulations based on 400 MHz and 900 MHz antennas were conducted respectively. The dielectric models concerning homogeneous or coupling distresses of pavements were established, and the effects of various distresses on detection were analyzed through reflected wave images. Relying on GPR tests and field tests, coring and excavation data acquired before rehabilitation were compared and verified. The calculation results match the field measurement results. Thus, the detection method based on GPR was proposed for pavement deep distresses.
Mardeni, R., Raja Abdullah, R.S.A. and Shafri, H.Z.M. (2010) Road Pavement Density Analysis Using a New Non-Destructive Ground Penetrating Radar System. Progress in Electromagnetics Research B, 21, 399-417.
Diamanti, N. and Redman, D. (2012) Field Observations and Numerical Models of GPR Response from Vertical Pavement Cracks. Journal of Applied Geophysics, 81, 106-116. https://doi.org/10.1016/j.jappgeo.2011.09.006