- Volume 20 Issue 1
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Forward probing utilizing electrical resistivity and induced polarization for predicting mixed-ground ahead of TBM tunnel face
전기비저항과 유도분극을 활용한 TBM 터널 굴착면 전방 복합지반 예측 기법
- Ryu, Jinwoo (School of Civil, Environmental and Architectural Engineering, Korea University) ;
- Park, Jinho (Department of Civil and Environmental Engineering, University of California) ;
- Lee, Seong-Won (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
- Lee, In-Mo (School of Civil, Environmental and Architectural Engineering, Korea University) ;
- Kim, Byung-Kyu (School of Civil, Environmental and Architectural Engineering, Korea University)
- 류진우 (고려대학교 건축사회환경공학부) ;
- 박진호 (UC버클리) ;
- 이성원 (한국건설기술연구원 지반연구소) ;
- 이인모 (고려대학교 건축사회환경공학부) ;
- 김병규 (고려대학교 건축사회환경공학부)
- Received : 2017.11.27
- Accepted : 2018.01.03
- Published : 2018.01.31
A method that can predict the mixed-ground condition ahead of a TBM tunnel face during tunnel construction utilizing electrical resistivity and induced polarization (IP) was proposed in this study. Effect of TBM advancement approaching the mixed-ground condition (composed of soil layer overlying rock layer) when currently running through soil zone on the electrical resistivity and IP measuring was assessed with laboratory-scale experiments. The resistivity and IP values were measured using four electrodes, by installing two electrodes on the tunnel face (at the cutterhead), and the other two electrodes on the segment lining. The test results showed that both of the measured resistivity and IP values were kept increasing as the TBM is approaching the soil-rock mixed-ground. Also, to get the more reliable results for predicting the mixed-ground condition, it was recommended that the measurement is made at the tunnel face utilizing 4-electrodes installed at the cutterhead as well as it is made utilizing the 2-electrodes installed at the segment lining along with the 2-electrodes installed on the tunnel face (at the cutterhead) so that two measured results are compared each other.
Grant : 고수압 초장대 해저터널 기술자립을 위한 핵심요소 기술개발
Supported by : 국토교통부
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