Journal of Korean Tunnelling and Underground Space Association (한국터널지하공간학회 논문집)

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
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Prediction of fault zone ahead of tunnel face using x-Rs control chart analysis for crown settlement

천단변위의 x-Rs 관리도 분석을 이용한 터널 막장 전방 단층대 예측

  • Yun, Hyun-Seok (Chungbuk National University, Dept. of Earth and Environmental Sciences) ;
  • Seo, Yong-Seok (Chungbuk National University, Dept. of Earth and Environmental Sciences) ;
  • Kim, Kwang-Yeom (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
  • 윤현석 (충북대학교 지구환경과학과) ;
  • 서용석 (충북대학교 지구환경과학과) ;
  • 김광염 (한국건설기술연구원 SOC성능연구소 Geo-인프라연구실)
  • Received : 2014.06.30
  • Accepted : 2014.07.16
  • Published : 2014.07.31
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Abstract

A measurement of tunnel displacement plays an important role for stability analysis and prediction of possible fault zone ahead of tunnel face. In this study, we evaluated characteristics of tunnel behaviour due to the existence and orientation of fault zone based on 3-dimensional finite element numerical analysis. The crown settlement representing tunnel behaviour is acquired at 5 m away from tunnel face in combination with x-Rs control chart analysis based on statistics for trend line and L/C (longitudinal/crown displacement) ratio in order to propose risk management method for fault zone. As a result, x-Rs control chart analysis can enable to predict fault zone in terms of existence and orientation in tunnelling.

터널 변위 계측은 전방의 단층대의 예측과 안정성 해석에서 매우 중요하다. 본 연구에서는 3차원 유한요소해석을 통해 터널 단층대의 방향과 존재에 따른 터널의 거동 특성을 평가하였다. 터널의 거동을 대표하는 계측치인 천단변위를 막장면에서 5 m 떨어진 지점에서 평가하였으며, 경향선과 L/C비 (종방향변위/천단변위)를 계산하여 통계적 관리기법인 x-Rs를 적용하여 단층대의 예측방안을 제시하였다. 결과적으로, x-Rs 관리도 기법이 전방 단층대의 존재와 방향을 예측하는데 활용될 수 있음을 확인하였다.

Keywords

References

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