레이저 스캐닝 자료를 이용한 터널 여굴량 산정

Abstract

Laser scanning technology with high positional accuracy and high density will be widely applied in 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. First, high-density three-dimensional data was obtained in a prompt and accurate manner using a terrestrial laser scanner. Data processing was then conducted to promptly determine arbitrary cross-sections at 1-meter intervals. A laser scanning technique was also used to quickly and accurately calculate the overbreak and underbreak of each cross-section and from the entire tunnel length. As the developed system utilizes vast amounts of data, it was possible to promptly determine the shape of arbitrary cross-sections and to calculate the overbreak and underbreak more accurately with higher area precision. It is expected, therefore, that the scanning data 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-sections.