Risk analysis using fault-tree analysis (FTA) and analytic hierarchy process (AHP) applicable to shield TBM tunnels |
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| Affiliation: | 1. Research & Development Division, Hyundai E&C, Seoul, Republic of Korea;2. Parsons Corporation, Boston, USA;3. School of Civil, Environmental and Architectural Engineering, Korea Univ., Seoul, Republic of Korea;1. Pamukkale University, Engineering Faculty, Geological Engineering Department, Denizli, Turkey;2. Pamukkale University, Engineering Faculty, Civil Engineering Department, Denizli, Turkey;1. CNNC Beijing Research Institute of Uranium Geology, Beijing 100029, China;2. Ecole Polytechnique Federalede Lausanne (EPFL), Lausanne CH-1015, Switzerland;3. Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China;1. Luleå University of Technology, Product and Production Development/Computer Aided Design, Campus Porsön Luleå, SE-97187, Sweden;2. Centre for Risk and Reliability Engineering, NTEC, The University of Nottingham, Nottingham NG7 2RD, United Kingdom;1. School of Civil, Environmental and Architectural Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 136-713, South Korea;2. School of Agricultural Civil & Bio-Industrial Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, South Korea;3. Institute of Agricultural Science & Technology, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, South Korea |
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| Abstract: | In this paper, the potential risk of undesirable events occurring during tunneling with application of a shield tunnel boring machine (TBM) method is discussed along with the risk analysis which can systematically assess overall risk levels. Potential risks and typical scenarios pertaining to shield TBM tunnels have been investigated based on previous case histories and correspondence with experts. The relevant risks from undesirable events were categorized into four groups: cutter-related malfunction, machine blockage or hold-up, mucking problems that hinder transporting excavated materials, and segment defects. A fault-tree set was constructed by grouping risk factors (or causes) into geological, design and construction/management factors. Risk analysis was performed by adopting fault-tree analysis (FTA) and an analytic hierarchy process (AHP) with consideration of the probability and impact of the risks. In addition, the proposed method was reliably validated by comparison with field observation, and thus indicates its applicability to risk management for shield TBM tunneling. |
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| Keywords: | Shield TBM Risk analysis Fault-tree analysis (FTA) Analytic hierarchy process (AHP) |
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