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Safe tunneling method using numerical modeling of rock blocks in long tunnels

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초록

Since about 70 percent of the territory is mountainous, more tunnels are constructed in Korea for maximizing the development efficiency. With the increasing number of tunnel construction, safe construction in tunnels has been emerged as the utmost important subject. Recently, the number of long tunnel construction is steeply increased because of the request for high speed and straight road. In this study, a safe tunneling method using numerical modeling of rock blocks in long tunnels is proposed, and then applied to the long tunnel based on real discontinuity information observed in situ. It is possible to detect key blocks all along the tunnel exactly by using the numerical analysis program developed for the safe tunneling method using numerical modeling of rock blocks. This computer simulation method with user-friendly interfaces can calculate not only the stability of rock blocks but also the design of supplementary supports.

Abstract

Since about 70 percent of the territory is mountainous, more tunnels are constructed in Korea for maximizing the development efficiency. With the increasing number of tunnel construction, safe construction in tunnels has been emerged as the utmost important subject. Recently, the number of long tunnel construction is steeply increased because of the request for high speed and straight road. In this study, a safe tunneling method using numerical modeling of rock blocks in long tunnels is proposed, and then applied to the long tunnel based on real discontinuity information observed in situ. It is possible to detect key blocks all along the tunnel exactly by using the numerical analysis program developed for the safe tunneling method using numerical modeling of rock blocks. This computer simulation method with user-friendly interfaces can calculate not only the stability of rock blocks but also the design of supplementary supports.

참고문헌 (8)

  1. Goodman, R. E., "Block theory and its application to rock engineering" (1985), Prentice-Hall
  2. Hwang, J. Y., "Stability evaluation of rock blocks in tunnels for observational method", 박사, pp.2003
  3. 황재윤, "터널시공에서의 불연속면의 연속성을 고려한 암반블럭의 거동성 및 안정성 해석기법", 한국지반공학회논문집, 19(2), pp.39~48 (2003), 한국지반공학회
  4. Hwang, J. Y., "New practical rock block analysis for observational design and construction method in large tunnels", Journal of Tunnel Engineering, 14, pp.17~26 (2004)
  5. Hwang, J. Y., "Quick evaluation method for discontinuity properties by vision metrology for observational design and construction method in tunnels", Proceedings of the 33rd Symposium of Rock Mechanics, pp.187~192 (2004)
  6. Ohnishi, Y., "Evaluation of stability of excavated jointed rock mass by block theory", Journal Geotechnical Engineering, 364, pp.209~218 (1985)
  7. Ohnishi, Y., "Survey, analysis and evaluation for discontinuous rock mass", Soil and Foundation, JGS, 47(12), pp.61~62 (1999)
  8. Ohnishi Y., "Keynote lecture: numerical methods and tunneling", Proceedings of the 4th International Summer Symp., pp.1~21 (2002)

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