Study on Ground-Penetrating Radar (GPR) Application in Pavement Deep Distress Detection
- 1 College of Water Conservancy and Environment, Zhengzhou University, Zhengzhou, China
- 2 Industrial Technology Research Institute, Chongqing University, Chongqing, China
- 3 School of Civil Engineering, Sun Yat-sen University, Guangzhou, China
Abstract
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.
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