Application study on fuzzy influence diagram in highway tunnel construction safety risk assessment

In highway tunnel engineering construction activities, there are a lot of uncertain factors, and the mutual interactions of kinds of risk factors are very complex. How to comprehensively analyze and evaluate safety risk of tunnel engineering construction and plan for risk management are long-term to solve the problems in tunnel engineering safety management. Based on the influence diagram theory, this paper establishes quantitative analysis model of fuzzy influence diagram which characterizes highway tunnel construction safety risk with baihuashan tunnel project as the background, and use the risk evaluation model of fuzzy influence diagram to evaluate tunnel engineering construction safety risk. The result shows that this method is scientific and effective.