Study On The Coupling Mechanism Of Safety Risk In Construction Projects

China has the high-speed development of Urbanization. All kinds of large-scale construction projects are being launched in full. Construction projects are faced with many and complex uncertainties. Such as construction of large mobility, the construction environment is complex, the construction period is long and open operation and many other reasons. These characteristics make the construction industry has a high risk,make frequent accidents. The occurrence of safety accidents in construction projects has brought us not only huge economic losses, but also serious casualties or bad social influence. The safe of construction project construction is the focus of the government and the community.Construction project safety construction is due to a large number of risk in the construction process of construction projects. The relationship between risk is complex, the process of dynamic development and the interaction between the formation of the coupling risk. Among all kinds of risk factors, people’s unsafe behavior is the primary factor in the accident. Human risk factors and other risk factors will interact with each other. So it is important to study the mechanism of safety risk in construction projects from the perspective of human.In this paper, based on man’s point of view, mainly using the theory and method of risk management theory, safety science, the science of complexity, system theory, risk coupling theory of subjects related to the construction safety risk coupling mechanism is studied. Based on the N-K model, the construction safety risk coupling model is established, and the corresponding measures are put forward. The application of the research results will help to reduce the risk of construction project construction, ensure the safety of construction projects, reduce personal injury and property damage.The full text is made up of seven parts:The first part explains the background and the source of the selected topic. Research objectives and research significance. Based on the review of domestic and foreign related research, the research contents and methods were determined.The second part introduces the related theory and research premise. Firstly, the cause of the accident is caused by the different risk factors, the main reason is the interaction between different risk factors and the interaction between the factors. Secondly, the construction safety risk coupling theory is studied, on the basis of this, the construction of the project construction safety risk coupling of the connotation of the definition; Finally, through the analysis of the leading role of the construction safety risk management, it is determined that this paper is based on the perspective of the construction project construction safety risk of the coupling problem.In the third part, the influence of different levels of risk factors on the safety of construction projects is analyzed by means of questionnaire. First, the construction safety risk factors analysis, according to the literature summary and data to find out from people, objects, environment, management of the four aspects of the impact on the construction project construction safety analysis; Secondly, based on the perspective of the people, from the perspective of decision-making, management and operation of the risk factors to the construction safety of the questionnaire survey, analysis of the impact of different levels of personnel risk factors on the construction safety.The fourth part is the analysis of the safety risk of construction project construction based on human’s visual angle. Firstly, the risk of different construction projects is defined, from different perspectives to the construction project risk analysis. Secondly, from the perspective of risk coupling process and coupling mechanism, the coupling status of risk factors of construction project construction is analyzed. Finally, based on the human perspective, the human factor is the factor of the human factor, the human factor and other risk factors, the factor of the two factors is coupled, the multi factor coupling is analyzed.The fifth part, Based on the comparison and selection of the related risk coupled model, Construction safety risk coupling N-K model of construction project based on complex network. It is combined with the last 5 years to build the project construction unsafe events of the statistical data to analyze the validation analysis.In the sixth part, according to the conclusion of the risk coupling model, the results of the questionnaire survey are combined, The prevention and control measures of the coupling of the three aspects of the construction safety risk in the construction projects are proposed from the perspective of the human- based view to reducing the risk and reducing the risk of coupling and decoupling.The seventh part summarizes the full text. The coupling mechanism of construction safety risk in construction project and the research of decoupling method are discussed.