Journal of the Korean Geosynthetics Society (한국지반신소재학회논문집)

Korean Geosynthetics Society (한국지반신소재학회)
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Numerical Analysis of Rock Pillar in Tunnel Diverging Area

터널 분기부 암반 필러의 거동 연구

  • Kang, Jae-Gi (Deputy General Manager, Hong-Ik Engineering & Consultants Co. Ltd.) ;
  • Lee, Choul-Kyu (Dept. of Civil Engineering, Daejin University) ;
  • Lee, Kang-Il (Dept. of Civil Engineering, Daejin University)
  • Received : 2015.03.20
  • Accepted : 2015.06.03
  • Published : 2015.06.30
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Abstract

This study assessed the behavior of rock pillar in tunnel diverging area by using a three dimensional numerical analysis. Based on parameters affecting the behavior of rock pillar, this study evaluated different safety factors according to pillar width, depth and rock conditions. It turned out that as the rock 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 tunnel diverging area was suggested.

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

Keywords

References

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Cited by

  1. An Assessment of Rock Pillar Stability in Tunnel Asymmetric Diverging Area using the Mohr-Coulomb Failure Theory vol.15, pp.4, 2016, https://doi.org/10.12814/jkgss.2016.15.4.017
  2. 복층터널 분기부에서의 보강공법(루프형 강선)에 따른 수치해석 연구 vol.20, pp.5, 2015, https://doi.org/10.9711/ktaj.2018.20.5.823