For the evaluation of the road cavity, GPR method is usually used widely. But the technique of image process is very difficult and confused owing to the similar signals. In this study, the deflection analysis is proposed for the supplement method of the GPR.

• 최준성(인덕대학교 토목환경공학과 정교수, 공학박사) | Choi, Jun-seong
• 이동훈(인덕대학교 토목환경공학과 전문학사과정) | Lee, Dong-hun