Application of Groud Penetrating Radar Antenna of Different Frequencies in Road Thickness Detection
In order to use the Ground Penetrating Radar(GPR)to comprehensively and accurately detect the thickness of road engi-neering structure layer,the working principle and detection method of GPR to detect the thickness of subgrade and pavement structure layer was described,and how to detect the thickness of subgrade and pavement structure layer with different frequencies of GPR anten-na in the same road section was explored.Taking Binjiang Road project in Changde City as an example,firstly,the GPR wave velocity is calibrated by drilling core sampling,and then the GPR of LTD-2600 with 1 500 MHz shield antenna is used to detect the asphalt concrete surface and 900 MHz shield antenna is used to detect the cement-stabilized gravel base.Finally,the radar software is used to stratify and evaluate the quality of the subgrade and pavement detection profile,and the analysis results achieve the expected detection purpose.
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