| At present,our country road,the railroad construction unceasingly advances,in the infrastructure construction process,the bridge construction also can not allow to neglect.As an indispensable part of the infrastructure construction project,the bridge can not only dredge the traffic jam,but also facilitate the resident’s travel and life.In a certain sense,the bridge can be called the link between urban areas,directly drive the development of regional economy.Bridge construction has been started in various cities all over the country,and accidents are common in the construction process.The social adverse effects such as property loss and casualties cannot be underestimated.Therefore,it is very important to evaluate the risk of the bridge construction project and eliminate the possible problems before it starts.In this paper,the risk of bridge construction project is studied as follows:First of all,the basic concept,assessment principle and significant characteristics of bridge construction risk assessment are described and analyzed.From the aspects of bridge construction structure,construction process and external conditions,the factors of bridge construction risk are sorted and classified.Then through literature review and analysis,it summarizes the relevant risk assessment methods and theories that can be applied to bridge construction projects.Among them,it analyzes the advantages and disadvantages and applicability of AHP and accelerating genetic algorithm.On the basis of theoretical analysis,an evaluation model combining analytic hierarchy process,accelerated genetic algorithm and fuzzy mathematics is established for the risk assessment of high-speed bridges in the construction process.At the same time,in the process of model building,it weakens the influence of human factors to the greatest extent,makes the assessment results more scientific,and thus reduces the probability of risk accidents to the greatest extent.Finally,the risk assessment model of the bridge construction project is analyzed through a case study of a bridge project.The results show that this paper has theoretical and practical significance for the study of risk assessment model of bridge construction projects,can effectively assess the construction risk of bridge construction projects,and put forward practical reference opinions for construction and management personnel. |
