Technical Reformation Scheme Decision-making Research Of Rural Highway Bridge In Shanxi Province

Until now, there is no specification for custody and reinforcement of rural highwaybridge, and there is no criteria for construction of rural highway bridge. Existing HighwayBridge Technique Condition Evaluation Criteria(JTG/T H21-2011)can’t reflect actualcondition of rural highway bridge, therefore researching technology strategies that suitable forrural highway bridge custody and reinforcement has become the top priority, which hasextremely important significance. Under such a background, the management office of therural road network of Shanxi Province Communications and Transportation Department haspositively carried out research on how to manage the damaged and old rural highway bridges,and has contributed to the progect Technical Evaluation System Study and Application ofRural Highway Bridge in Shanxi Province. The project is a soft science cooperative projectbetween our school and Shanxi Province Communications and Transportation Department,the text is part of the project.Based on investigation in three cities and counties in Shanxi Province, this textsummarized the main structural style and common diseases of rural highway bridge in ShanxiProvince, and listed maintenance and reinforcement technology that suited for rural highwaybeam and arch bridges. Based on principles of engineering economy, this text built theeconomy analysis model for reinforcement and reconstruction of rural highway bridges. In theeconomy analysis model dynamic analysis method for cost year is adopted, this textdetermined general expenses in its life cycle based on considering actual condition of ruralhighway bridge, then provided analysis model for evaluating annual cost, after comparisonaverage annual cost of reinforcement and reconstruction, the program that has less averageannual cost was suggested. Because instability of parameters in the model may disturb theaccuracy of economic analysis, thus sensitivity analysis is done afterwards, so computedresult of the model can be decided more accurately.Hope the research in the text can provide important basis to bridge maintenance andmanagement department to grasp actual service conditions of rural highway bridges, topropose maintenance measures, to decide reinforcement or reconstruction program, tooptimize capital investment, meanwhile to enhance the bearing capacity and durability of active rural highway bridges, to improve their performance and guarantee the serviceabilitysafety of structures, and bring good social significance for the development of rural economy.