Research On Construction Safety Risks Of Yinzhou Lake Super Bridge On Zhongkai Expressway

With the implementation of the strategy of a powerful transportation country,the pace of China’s transportation infrastructure construction is advancing rapidly,and the number of large and complex bridges is increasing.Among them,the construction process of the high-span long-span bridges in coastal areas is complicated,the construction period is long,and there are many uncertainties in the construction,so the safety problems of bridge construction will be more prominent.In this paper,through a deep analysis of the current status of construction safety research at home and abroad,combined with the characteristics and reality of Yinzhou Lake Extra Large Bridge,the construction safety risk study of Yinzhou Lake Extra Large Bridge was carried out,and the safety evaluation and prediction of Yinzhou Lake Extra Large Bridge The quantitative model has formulated a multi-level risk management plan for major risk sources,which provides technical support for the construction safety of the Yinzhou Lake Super Large Bridge.The main results are as follows:(1)From the natural environment in which the project is located(including the geology,hydrology,climate of the area),the construction organization design and construction plan adopted,the organization and management level and technical level of the construction team,the social environment and the human environment,the bridge construction A thorough investigation and analysis of the entire process of the project was conducted,and a risk source identification list for the Yinzhou Lake Large Bridge was established.(2)Combining the occurrence characteristics,interaction and conduction mechanism of safety risks during bridge construction,a qualitative and quantitative research method is proposed.An expert scoring method is used to establish a fuzzy consistent judgment matrix,and then the fuzzy analytic hierarchy process is used to quantify the risk.This method is simple,practical,and highly accurate,and can largely avoid the impact of human subjective factors on risk quantification.(3)Apply grey theory and entropy weight to identify major risk sources.Through the correlation analysis of the internal relationship between each risk source,master its development rules and characteristics,apply the gray correlation analysis method to establish the correlation matrix,and then use the entropy idea to establish the weight of various risks and rank them as Basis for identification of major risk sources.(4)The factor analysis method in SPSS software was used to extract the principal components of the sample,and the representative factors were selected to be used as the training data of the neural network model,combined with the weight data of various risk source indicators during the construction of the Yinzhou Lake Super Bridge.The neural network model was used to assess the overall risk of the Yinzhou Lake Super Large Bridge during the construction period.(5)Different countermeasures are proposed for different safety risk problems that appear on bridges,mainly including risk absorption,risk avoidance,risk transfer,risk mitigation,risk control and risk prevention.The risk transmission principle was applied to the safety risk monitoring of the Yinzhou Lake Super Bridge during the construction period,and a program suitable for the safety risk assessment of the bridge construction period was compiled based on the MATLAB platform.