병렬 쉴드터널의 이격거리와 적용사례

Distance between the Parallel Shield tunnel and Application

  • 곽철홍 ((주)삼보기술단 지반사업부) ;
  • 김재영 ((주)삼보기술단 지반사업부) ;
  • 김동현 ((주)삼보기술단 지반사업부) ;
  • 이두화 ((주)삼보기술단) ;
  • 이승복 (삼성건설 국내토목영업팀) ;
  • 김응태 (삼성건설 국내토목영업팀) ;
  • 심재범 (삼성건설 토목기술팀)
  • 발행 : 2005.04.01

초록

The construction of parallel tunnel by using the shield TBM method was increased recently. Accordingly the application and the propriety of the parallel shield TBM tunnels were studied through domestic and foreign construction cases herein. Also the behavior of tunnel structure and ground was evaluated by a numerical analysis with various ground conditions and the distance between the parallel tunnels. As a result, it was concluded that a deep investigation as well as a ground reinforcement was required with a ratio(L/D) of the distance between the parallel tunnels(L) to tunnel outer diameter(D) less than 0.5 because the Interference phenomenon was expected to occur. And the appropriateness of the application method of parallel shield TBM tunnel was validated through the 2-dimensional numerical analysis simulated the process of excavation after the ground reinforcement in the starting area of the OOO construction site with the ratio(L/D) of 0.35.