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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

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.

Acknowledgement

Grant : 터널시공 중 디지털 맵핑을 통한 온라인 암판정 기술 및 운영모델 개발

Supported by : 국토교통과학기술진흥원

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  2. Developments of real-time monitoring system to measure displacements on face of tunnel in weak rock vol.17, pp.4, 2015, https://doi.org/10.9711/KTAJ.2015.17.4.441
  3. Prediction of Fault Zone ahead of Tunnel Face Using Longitudinal Displacement Measured on Tunnel Face vol.26, pp.2, 2016, https://doi.org/10.9720/kseg.2016.2.187