E-JOURNAL
Safety risk assessment of subway shield construction under-crossing a river using CFA and FER
Numerous subway projects are planned by China’s city governments, and more
subways can hardly avoid under-crossing rivers. While often being located in
complex natural and social environments, subway shield construction undercrossing a river (SSCUR) is more susceptible to safety accidents, causing
substantial casualties, and monetary losses. Therefore, there is an urgent need
to investigate safety risks during SSCUR. The paper identified the safety risks
during SSCUR by using a literature review and experts’ evaluation, proposed a
new safety risk assessment model by integrating confirmatory factor analysis
(CFA) and fuzzy evidence reasoning (FER), and then selected a project to validate
the feasibility of the proposed model. Research results show that (a) a safety risk
list of SSCUR was identified, including 5 first-level safety risks and 38 secondlevel safety risks; (b) the proposed safety risk assessment model can be used to
assess the safety risk of SSCUR; (c) safety inspection, safety organization and duty,
quicksand layer, and high-pressure phreatic water were the high-level risks, and
the onsite total safety risk was at the medium level; (d) management-type safety
risks, environment-type safety risks, and personnel-type safety risks have higher
expected utility values, and manager-type safety risks were expected have higher
risk-utility values when compared to worker-type safety risks. The research can
enrich the theoretical knowledge of SSCUR safety risk assessment and provide
references to safety managers for conducting scientific and eective safety
management on the construction site when a subway crosses under a river.
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