A study on the interpretations of tunnel convergence function parameters

터널 내공 변위 거동 분석에 관한 연구

  • 김창용 (한국건설기술연구원 지반연구부) ;
  • 홍성완 (한국건설기술연구원 지반연구부) ;
  • 김광염 (한국건설기술연구원 지반연구부) ;
  • 백승한 (한국건설기술연구원 지반연구부)
  • Published : 2004.09.01

Abstract

The introduction of geodetic methods of absolute displacement monitoring in tunnels has significantly improved the value of the measurements. Structurally controlled behavior and influences of an anisotropic rock mass can be determined, and the excavation and support adjusted accordingly. Three-dimensional finite element simulations of different weakness zone properties, thicknesses, and orientations relative to the tunnel axis were carried out and the function parameters were evaluated from the results. The results were compared to monitoring results from Alpine tunnels in heterogeneous rock. The good qualitative correlation between trends observed on site and numerical results gives hope that by a routine determination of the function parameters during excavation the prediction of rock mass conditions ahead of the tunnel face can be improved. Implementing the rules developed from experience and simulations into the monitoring data evaluation program allows to automatically issuing information on the expected rock mass quality ahead of the tunnel.