Research And Application Of Risk Management In Bridge Construction Stage

In recent years, with the increasing domestic investment, China’s transportation infrastructure project construction is also undergoing tremendous changes. Bridges,which are tools for cars,trains and people to across obstacles, are developing particularly rapidly. They renew the record again and again all over the world. People love bridges very much for its inherent unique characteristics. It’s not only a tool, but also saving the space in the urbanization development.Facing the rapid development of today’s railway industry, "eight vertical and eight horizontal" is perfected gradually which is proposed in the "Eleventh Five Year". At the same time, the new urbanization documents proposed by the Party Central Committee and the State Council promote the footsteps of the cities. That makes the all kinds of viaduct, new landscape bridge into the crowd one by one. However, as an open system to connect each other, bridge bears all kinds of risks both in the operation stage and in the construction stage. The existence of risks may cause economic losses, affect people’s lives, even result in heavy casualties.This paper focuses on the risk of bridge in the construction phase and analysis the three level risk factors. Qualitative and quantitative analysis methods are introduced and compared. Establish relevant mathematical model and use the Fault Tree analysis method for qualitative and quantitative analysis the risk of bridge in construction stage. Then to calculate the probability of all kinds of risk factors, and then use the calculated probability of risk probability analysis of the importance. Finally use three level risk factor which in the construction stage of the most dangerous for further study to refine the fourth level of risk and use of LEC evaluation method for risk assessment. A system are initially constructed based on fault tree and LEC to analyze and management the risk of bridge. The system is the key to realize fault tree and LEC evaluation method from theory to practice. It has certain application value.In short, bridge brings convenience for our daily life as well as trouble, especially in construction stage. The statistical evidence of bridge accidents in recent years shows that risks in the construction phase are more than that in the application phase. Therefore, how to control the risk effectively in the bridge construction phase and reduce the risk of the bridge accident is the most urgent and the most important task. Similarly, eliminate the bridge safety accidents and reduce economic loss is also very important for all levels of government and the participation of the unit. Therefore, risk control in the process of bridge construction have a positive effect for cost control, quality control, schedule control, safety management and other aspects.