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A risk management system applicable to NATM tunnels: methodology development and application

NATM 터널의 리스크 관리 시스템 개발 및 현장적용

  • Chung, Heeyoung (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Lee, Kang-Hyun (Research Institute, Korea Expressway Corporation) ;
  • Kim, Byung-Kyu (Department of Future Technology and Convergence Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, In-Mo (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Choi, Hangseok (School of Civil, Environmental and Architectural Engineering, Korea University)
  • 정희영 (고려대학교 건축사회환경공학부) ;
  • 이강현 (한국도로공사 도로교통연구원) ;
  • 김병규 (한국건설기술연구원 미래융합연구본부) ;
  • 이인모 (고려대학교 건축사회환경공학부) ;
  • 최항석 (고려대학교 건축사회환경공학부)
  • Received : 2020.01.28
  • Accepted : 2020.02.21
  • Published : 2020.03.31

Abstract

In this paper, a risk management system applicable to NATM tunneling projects is proposed. After investigating case histories in NATM tunnel collapse, this paper analyzes the potential risk factors and their corresponding risk events during NATM tunnel construction. The risk factors are categorized into three groups: geological, design and construction risk factors. The risk events are also categorized into four types: excessive deformation, excessive deformation with subsidence, collapse inside tunnels, and collapse inside tunnels with subsidence. The paper identifies risk scenarios in consideration of the risk factors and proposes a risk analysis/evaluation method for the NATM tunnel risk scenarios. Based on the evaluation results, the optimal mitigation measure to handle the risk events is suggested. In order to effectively facilitate a series of risk management processes, it is necessary to develop a risk register and a management ledger for risk mitigation measures that are customized to NATM tunnels. Lastly, the risk management for an actual NATM tunnel construction site is performed to verify the validity of the proposed system.

Acknowledgement

Supported by : 도로교통연구원

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