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

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
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Study on key safety hazards and risk assessments for small section utility tunnel in urban areas

도심지 소단면 터널식 공동구의 핵심 안전 위험요소 및 위험성 평가 연구

  • Seong, Joo-Hyun (Research Institute for Infrastructure Performance, Korea Infrastructure Safety & Technology Corporation) ;
  • Jung, Min-Hyung (Research Institute for Infrastructure Performance, Korea Infrastructure Safety & Technology Corporation)
  • 성주현 (한국시설안전공단 시설성능연구소) ;
  • 정민형 (한국시설안전공단 시설성능연구소)
  • Received : 2018.08.10
  • Accepted : 2018.09.07
  • Published : 2018.11.30
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Abstract

In line with the increased usability of utility pipe conduits in urban areas, construction and R&D activities of utility tunnel, incorporated with the shield TBM method, are actively under way. The utility tunnels are installed through underground excavation, and thus are relatively weak in terms of construction safety. However, hazards associated with the utility tunnel construction have not been properly identified, despite the introduction of a policy to the 'Design for Safety' for the purpose of reducing accident rates in the construction industry. Therefore, in this study, following the derivation of hazards associated with utility tunnel, these hazards were then used as the basis to uncover key safety hazards requiring extensive management in a field, which were then used to conduct a risk assessment having applied the matrix method so that the results can be utilized in risk assessment during the stages of utility tunnel planning, design, and construction, while also serving as a data reference.

도심지에서의 공동구의 활용성 증가에 따라 쉴드 TBM 공법이 적용된 터널식 공동구의 시공 및 연구개발이 활발히 진행되고 있다. 터널식 공동구는 지하굴착 공사로써 건설안전에 상대적으로 취약하지만, 건설업 재해율 감소를 위한 설계안전성 검토 제도 도입에도 불구하고 터널식 공동구 건설에 적합한 위험요소가 제대로 알려져 있지 않다. 따라서 본 연구에서는 터널식 공동구에 적합한 안전 위험요소를 발굴하고 이중에서 중점으로 관리되어야 할 핵심 안전 위험요소를 도출하였다. 도출된 핵심 안전 위험요소는 매트릭스 기법을 적용하여 위험성 평가를 실시함으로써 공동구 계획, 설계 및 시공 단계의 위험성 평가 및 주요 참고 자료로 사용될 수 있도록 하였다.

Keywords

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Fig. 1. Comparison of industrial disaster between all and construction (MOEL, 2012~2018)

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Fig. 2. Process of conventional Delphi survey

Table 1. Hazards of small section utility tunnel based on detailed construction type

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Table 2. Results of the Delphi surveys for safety hazards of the utility tunnel

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Table 2. Results of the Delphi surveys for safety hazards of the utility tunnel (continue)

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Table 3. Criteria of risk assessment for 4 × 4 matrix (MOLIT, 2017)

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Table 4. Criteria of severity and likelihood for 4 × 4 matrix (MOLIT, 2017)

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Table 4. Criteria of severity and likelihood for 4 × 4 matrix (MOLIT, 2017) (continue)

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Table 5. AHP results of severity and likelihood for each key hazard

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Table 6. Results of risk assessment for each key hazard

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