Comprehensive Risk System Analysis and Factor Coupling in Underground Railway Space
Publication: ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part A: Civil Engineering
Volume 10, Issue 3
Abstract
The rapid expansion and intensification of urbanization have led to increased growth and utilization of underground spaces. This trend has raised safety concerns, necessitating additional preventive and mitigation measures. This study presents a comprehensive and systematic assessment of safety risks in urban underground railway spaces. Various research techniques were employed, including literature review, case study, risk matrix, Borda ordinal, and Bayesian network methods. The ISO 31000:2018 risk management standard served as the framework for risk management. Based on existing knowledge, three main risk categories, consisting of 17 constituent risk factors, were identified: rail system; passenger behavior; and environmental hazards. This study critically analyzed the interrelationships and couplings of risks among these categories. A Bayesian network is constructed based on the collected accident information, and the probability that the level of risk is located at low, medium, and high levels is calculated to be 42%, 39%, and 20%, respectively. This finding is verified with a real case of an in-operation subway. Inverse reasoning and sensitivity analyses were conducted using Genie software to predict the occurrence probability and severity of high-risk factors. The findings highlighted significant risks to underground railway spaces, such as arson and accidental fires. In response, authorities proposed measures to enhance risk management strategies. The results provide a theoretical foundation, diverse analytical approaches, and practical guidelines to improve risk management capabilities in urban underground spaces, thus facilitating the development of informed risk management strategies.
Practical Applications
Urbanization has intensified the use of underground spaces to accentuate safety concerns, which demand improved predictive, preventive, and mitigating strategies. Planners and managers of such heavily used venues need guidance in risk management based firmly on theories and research findings. Due to multiple and interrelating factors, approaches relying on analyzing individual factors and ignoring factor interactions may not offer desirable solutions. This study assessed safety risks in the factor-coupling mode in urban underground railways by applying a combination of judiciously chosen analytical tools. Three main risk categories, with 17 constituent factors, were identified: rail system; passenger behavior; and environmental hazards. Interrelationships and couplings of risks were analyzed to deepen understanding of the complex associations. A Bayesian network calculated probabilities of low, medium, and high-risk levels at 42%, 39%, and 20%, respectively. Acute risks like arson and accidental fire were highlighted. Practical coping strategies were proposed to tackle the risks. The findings can help the management to establish measures to enhance risk management and reduce impacts. The results offer theoretical foundations, analytical approaches, and practical guidelines for informed risk abatement design, planning, and management in urban underground spaces.
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Data Availability Statement
All data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This work was supported by general projects of the China National Social Science Foundation (Grant No. 22BGL237).
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Information
Published In
ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part A: Civil Engineering
Volume 10 • Issue 3 • September 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Sep 10, 2023
Accepted: Mar 1, 2024
Published online: May 21, 2024
Published in print: Sep 1, 2024
Discussion open until: Oct 21, 2024
ASCE Technical Topics:
- Business management
- Case studies
- Coupling
- Disaster risk management
- Engineering fundamentals
- Infrastructure
- Methodology (by type)
- Practice and Profession
- Public administration
- Public health and safety
- Rail transportation
- Research methods (by type)
- Risk management
- Safety
- Structural engineering
- Structural members
- Structural systems
- Structures (by type)
- Subways
- Transportation engineering
- Underground structures
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