Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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Stability Analysis of Rock Pillar in the Diverging Area of Road Tunnel

도로터널 분기부 암반 필라의 안정성 평가

  • 강재기 ((주)홍익기술단 토질부) ;
  • 양형식 (전남대학교 에너지자원공학과) ;
  • 장선종 ((주)삼보기술단 지반사업부)
  • Received : 2014.08.11
  • Accepted : 2014.10.08
  • Published : 2014.10.31
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Abstract

In this study, the behavior of rock pillar in the diverging area of road tunnel was assessed by using a three dimensional numerical analysis. Based on parameters affecting the behavior of rock pillar, different safety factors according to pillar width, depth and rock conditions were evaluated. It turned out that as the pillar width increases, the change curve of safety factors in accordance with depth and rock conditions shows more of the nonlinear behavior. By the assessment of the minimum safety factor, a safety factor chart on the behavior of rock pillar in the diverging area of road tunnel was suggested.

본 연구에서는 도로터널 분기부 암반 필라의 거동을 3차원 수치해석 방법으로 검토하였다. 암반 필라의 거동에 영향을 미치는 매개변수로 암반 필라의 이격거리, 토피고, 암반등급 변화에 따른 안전율을 평가하였다. 필라의 이격거리가 증가할수록 토피고와 암반등급에 따른 안전율 변화 곡선은 비선형 거동을 보였으며, 도로터널 분기부에서 암반 필라의 거동 특성을 최소 안전율을 기준으로 안전율 도표로서 제안하였다.

Keywords

References

  1. 김양운, 정상훈, 강세구, 안경철, 2007, 병설터널 필라부의 텐션볼트 보강에 따른 동특성 및 보강효과에 관한 연구, 대한토목학회 정기 학술대회 논문집, 2947-2950.
  2. 장수호, 김창용, 2009, TBM에 의한 도심지 지하도로의 건설 사례, 한국지반공학회지, 25.11, 8-19.
  3. 한국터널공학회, 2002, 서초역-방배로간 도로개설공사 중 터널안정성 검토 연구(서리풀터널 안정성 검토연구), 145p.
  4. 한국터널공학회, 2004, 부산-거제간 연결도로 중죽도 통과 구간 근접 터널보강공법 설계 검토 연구, 107p.
  5. Hoek, E. I. and E. T. Brown, 1980, Underground Excavations in Rock, IMM, London.
  6. Kim, D.S., Kim, Y.G., 2007, A study on the stability analysis for asymmetry parallel tunnel with rock pillar, Tunnelling Technology, Vol. 9, No. 4, pp. 387-401.
  7. Kim, W.B., Yand, H.S., Ha, T.W., 2012, An Assessment of Rock Pillar Behavior in Very Near Parallel Tunnel, TUNNEL & UNDERGROUND SPACE, Vol. 22, No. 1, pp. 60-68. https://doi.org/10.7474/TUS.2012.22.1.060
  8. Matsuda, T., E. Toyosato, M. Igarashi, Y. Nashimoto and T. Sugiyama, 1997, A study on design methods for twin tunnels constructed by the single drift and central pier method, Procd. Studies on Tunnel Eng. Vol. 7.
  9. Peck, R. B., 1969, Deep excavations and tunnelling in soft ground, Procd. 7th Int. Conf. on Soil Mech. and Foundation Eng., Mexico, State-of-the-Art Report 3, 225-290.
  10. Popit, A. and Rant, J., 2008a, Construction of the Sentvid tunnel, RMZ- Materials and Geoenvironment, 55.2, 259-276.
  11. Popit, A. and Rant, J., 2008b, Construction of the Sentvid tunnel with the caverns in Ljubljana, Slovenia, World Tunnel Congress 2008 - Underground Facilities for Better Environment and Safety - India, 1401-1415.

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