Study On Road-railway Bridge Design Programme Based On Life-Cycle

With the rapid development of infrastructure in our country,the construction of road network in our country is perfecting day by day,the road-railway bridge is inevitable,and the merits of flyover project directly affect the smoothness of road network.The bridge project is a social welfare project,The practicality and sustainability of the bridge directly affect people's travel life.Chinese Academy of engineering consulting report written by loudly appeal[1]:as soon as possible to establish the bridge whole life design concept based on durability,formulate the appropriate standard,make our country in bridge design and construction stage,meet the performance requirements of the whole life.Because of the shortage of research time,the study of overpass only represents the bridge across the railway line on the highway.The whole life design process of overpass includes five processes,including bridge safety design,age determination,applicability design,aesthetic design,management maintenance and demolition design.Overpass is the whole life design cost,function,environment and other aspects of demand to specific indicators,and from the bridge research,design and construction,operation,management and maintenance and removal of all aspects of seeking methods and measures to ensure appropriate indicators of bridge structure life cycle as optimal as possible.The comparison and selection of overpasses include both the rationality of design stage,the maturity of construction technology,the feasibility of construction,the construction period and the cost of construction,The comparison and selection of overpasses include both the rationality of design stage,the maturity of construction technology,the feasibility of construction,the construction period and the cost of construction,At the same time,it also includes maintenance feasibility,maintenance cost and service level in operation stage,and also includes the comparison and removal of long-term plans,or the removal and recovery after failure.It should also include the environmental impact of the implementation stage and the impact of operation stage on the environment.Through the analysis of the whole life design content of the overpass,the constraining factors and technical indicators of the overpass design,the design of the overpass bridge scheme is designed,and then through the analysis of the comparison and selection of the overpass scheme,the scheme selection of the overpass bridge type is summarized.From the research stage to the whole life cycle and put into use in the late maintenance related issues,to provide decision-making basis for investment and the construction of the party,for the future railway crossing to interchange reconstruction,the new highway bridge across the railway scheme is selected to provide reference,so that the design and construction of overpass bridge is more efficient?easonable?systematic?cientific.