Scanning technic is implemented with the underground structures: subway, tunnel, shaft, drainage path, spillway, and slurry wall. Both optical and laser scanning system have been conducted to the precise inspection of diagnosis and safety. Image and 3D coordinate from scanning can be utilized in monitoring scope and fundamental database of maintenance. There is a high possibility that the scanning will prevail on inspection and diagnosis.

• 추진호(한국시설안전공단 도시철도실) | Choo, Jin Ho 교신저자
• 안팔용(대구도시철도공사 토목팀) | Ahn, Pal Young
• 이대수(대구도시철도공사 토목팀) | Lee, Dae Soo
• 지기환(한국계측기술연구소(KMTL)) | Jee, Kee Hwan
• 윤태국(한국시설안전공단 시설안전연구소) | Yoon, Tae Gook