In this paper it is verified that the cavity of ground under box-culvert is closely related to the inspection grade of box-culvert. The field survey results of cavity exploration were compared to inspection grade of box-culvert. The test results show that the results of cavity exploration be a good index to predict inspection grade of box-culvert.

• 조진우(한국건설기술연구원 Geo인프라연구실 전임연구원, 공학석사) | Jinwoo Cho 교신저자
• 김진만(한국건설기술연구원 Geo인프라연구실 선임연구위원, 공학박사) | Jin Man Kim
• 최봉혁(한국건설기술연구원 Geo인프라연구실 수석연구원, 공학박사) | Bong Hyuck Choi
• 조원범(한국건설기술연구원 Geo인프라연구실 박사후연구원, 공학박사) | Won Beom Cho