Abstract
In this study, the applications and the limitations of the Ground-penetrating radar (GPR) investigation have been addressed with the main objective of improving the efficient GPR application of subsurface surveys on Korean expressways. The depth of investigation and detection performance of anomalous objects have been studied using two different types of multichannel GPR on the Korean Expressway Corporation’s nondestructive testing testbed for subsurface detection. Based on the field survey, it was found that utilizing the plane view by depth, cross-sectional and longitudinal profile data of the multichannel GPR simultaneously, analysis and evaluation of the GPR signals are more efficient and practical. Although there was a difference in the frequency of use, the precision difference between two GPR is almost similar in the investigation depth and detection performance of the pavement subsurface anomaly. Under an asphalt concrete standard pavement section, the effective depth of cavity detection is 1–1.5 m, while detection under concrete pavement is less than 1.0 m. In addition, there is still a need to calibrate depths using field cores when constructing a 3D underground facility map.
Highlights
The shallower the depth of the Ground-penetrating radar (GPR) signal, the sharper the contrast, but the greater the depth, the softer the GPR signal becomes. This is due to signal attenuation wherein as the GPR wave propagates through the medium, in which the amplitude of the received wave obtained at shallower depth is greater than the amplitude of the received wave obtained at deeper depth
The ability of the GPR for subsurface investigation using two types of GPR equipment was evaluated in this study
Several GPR surveys were conducted on a test road simulating
Summary
GPR has been used in several research projects and practical engineering application for various purposes such as in boreholes where the GPR is used to characterize the ground mass, soil fractures, infill and soil hydraulic properties [1,2]. Radar antennas specially designed to the and target medium vestigation areinvestigation used by GPRs. 1, a circuit within the radar control are used by GPRs. a circuit withinunit the radar control generates a train of trigger pulses thatofare sent to the electronic receiver. As the radar propagates in the medium, some energy is transmitted and some at the interface, wherein atthe (EM)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
