Research On Safety Risk Assessment Of Subway Construction Based On SEM

With the urbanization process developed rapidly,the increase in urban traffic pressure has improved,and the subway has been promoted and used as a green,safe and convenient means of transportation.However,with the expansion of the construction scale,the number of safety accidents is also increasing in subway construction,causing huge casualties and property losses.The statistical analysis of subway construction safety accidents shows that the safety risk factors involve various construction processes,including personnel,management,environment,technology and organization.Therefore,the subway construction safety risk assessment system is studied to promote the safe construction of subways and reduce the occurrence of a safety incident,which is significant.Based on the conclusions of a certain section of the Fuzhou Metro Line 6,this study analyzes the factors affecting construction safety during the construction process,and identifies the main impact indicators,using structural equations.The model constructs the subway construction safety risk assessment index system,and finally analyzes the path of each influencing factor and proposes corresponding safety construction suggestions.Therefore,the research content mainly includes the following aspects:(1)Through the reading and statistical analysis of domestic and foreign references,the causes of subway accidents are summarized,and the cases of subway construction safety accidents in China in the past 15 years are summarized and analyzed,which provides a source for the determination of indicators.(2)Analyze the factors affecting the safety of various subway constructions,and determine the evaluation indicators.Initially establish an evaluation model,and design the questionnaires,and finally recover 224 valid questionnaires.Check the validity and reliability of all the scale data with the SPSS21.0 software to.The analysis results showed that the selected indicators met the requirements and could be used as the evaluation indicators of the formal questionnaire.(3)According to the determined evaluation indicators,the structural equation model is established by AMOS21.0 software,the sample data is imported into the software for calculation and analysis,the path coefficients between each index and their respective weights are calculated,and the evaluation system of subway construction safety risk is finally established.(4)Conduct empirical analysis with engineering cases,then verify the effectiveness of the risk evaluation system with the actual project,and verify the validity of the evaluation model.According to the analysis results,relevant conclusions and recommendations are proposed.Finally,the shortcomings of the method and the established system process are summarized in this research,and the future research development is proposed.