Development of Cross Section Management System in Tunnel using Terrestrial Laser Scanning Data

지상 레이저 스캐닝 자료를 이용한 터널단면관리시스템 개발

  • Roh, Tae-Ho (Department of Civil Engineering, Pukyong National University) ;
  • Kim, Jin-Soo (Department of Civil Engineering, Pukyong National University) ;
  • Lee, Young-Do (Civil Engineering, Dong-Eui Institute of Technology)
  • 노태호 (부경대학교 토목공학과) ;
  • 김진수 (부경대학교 토목공학과) ;
  • 이영도 (동의과학대학 건설정보과)
  • Received : 2008.01.16
  • Accepted : 2008.02.25
  • Published : 2008.03.31

Abstract

Laser scanning technology with high positional accuracy and high density will be widely applied to vast range of fields including geomatics. Especially, the development of laser scanning technology enabling long range information extraction is increasing its full use in civil engineering. This study taps into the strengths of a terrestrial laser scanning technique to develop a tunnel cross section management system that can be practically employed for determining the cross section of tunnels more promptly and accurately. Three dimensional data with high density were obtained in a prompt and accurate manner using a terrestrial laser scanner. Data processing was then conducted to promptly determine arbitrary cross sections at 0.1meter, 0.5meter and 1.0meter intervals. A laser scanning technique was also used to quickly and accurately calculate the overbreak and underbreak of both each cross section and the entire tunnel section. As the developed system utilizes vast amounts of data, it was possible to promptly determine the shape of arbitrary cross section and to calculate the overbreak and underbreak more accurately with higher area precision. It is expected, therefore, that the system will not only enable more efficient and cost effective tunnel drilling management and monitoring but also will provide a basis for future construction and management of tunnel cross section.