Applicability of the single shell tunnel in Korea from the economic evaluation

경제성 분석에 의한 싱글쉘 터널의 국내 적용성 검토 연구

  • 김학준 (대전대학교 지반설계정보공학과) ;
  • 신휴성 (한국건설기술연구원 지하구조물연구실)
  • Published : 2008.06.30

Abstract

The construction cost for the single shell tunnel is cheaper than that of the double shell tunnel according to the case studies performed in several domestic and foreign tunnels. However, the economic advantage of single shell tunnel drops drastically as the condition of the rock mass deteriorates. Therefore, the single shell tunnelling method should be applied to the good rock mass conditions. The application of the single shell tunnelling method to tunnels in Korea should be determined considering the ratio between the good rock and poor rock masses along the tunnel section. The use of the single shell tunnel is expected to offend depending on the cheap supply of high quality shotcrets and rock bolts developed for single shell tunnels.