Research On Safety Risk Evaluation Of Mountain Expressway Construction

Since the reform and opening up,the pace of infrastructure construction in China's transportation sector has gradually accelerated,it has successfully achieved a major leap in economic and social development from "bottleneck constraints" to "primary mitigation" and then to "basic adaptation".Especially,the construction of expressway in mountainous area has made an important contribution to promoting the economy of mountainous area and improving people's life in mountainous area.However,due to the extremely complex hydrogeological conditions and surrounding environmental in the construction of mountainous expressway,there are many types of structures,difficulties in construction,and high technical requirements,and production safety accidents occur frequently during construction.In order to improve the current safety status of mountain expressway construction,prevent major risks and prevent production safety accidents in advance,this paper takes mountain expressway as the research object,focuses on the construction safety risk,comprehensively uses the literature research and theoretical analysis,induction and summary,qualitative and quantitative analysis and other research methods,construct a construction safety risk assessment model,and conduct a comprehensive evaluation based on actual cases to verify the scientific,systematic and feasibility of the model,and provide reference for similar projects and other projects.In summary,the research conclusions of this paper mainly include the following five aspects:First,it deeply analyzes the research status of mountain expressway construction safety risk,and has a comprehensive understanding of the existing problems and deficiencies in the current research;The second is to summarize and determine the mountain expressway construction safety risk list,through the analysis of the characteristics and difficulties of mountain expressway construction,combined with literature research,industry standards,risk assessment guidelines and other important document requirements,to determine 4 categories and 40 risk factors;Thirdly is to systematically build mountainous expressway construction safety risk evaluation index system.and finally determined 4 first-level indexes and 31 second-level indexes through the multi-round,multi-layer,multi-dimensional and multi-angle optimization index system;The fourth is scientific establishment mountain expressway construction safety risk fuzzy comprehensive evaluation model,based on the analysis of domestic and foreign research present situation and learning methods study theory,in combination with the practical situation of engineering construction,by means of qualitative and quantitative analysis,selection of network combination analytic hierarchy process and entropy weight method to determine evaluation index weights,which improved the disadvantages of using subjective weight method or objective weight method to determine the weight of evaluation index,the fuzzy comprehensive evaluation method was used to correct the ambiguity of risk evaluation indicators,and the ANP-EW-FUZZY evaluation model was established;The fifth is to verify the mountainous expressway construction safety risk evaluation model of scientific and systematic and feasible credibility,and adhere to the principle of combining theory with practice,based on the Z mountain expressway project under construction as an empirical risk assessment analysis,it is concluded that the current risk level of the Z project is "medium risk",and according to the evaluation results,management measures and suggestions in organization,management,economy and technology are put forward.In this paper,there are 15 figures,22 tables and 54 references.