Study On Reinforcement And Inspection Technology Of Maqu Yellow River Bridge

Bridge reinforcement can effectively extend the service life of bridge,which can not only make the bridge meet the traffic quantity requirement,but also can relieve the concentration of bridge investment,so it has good economical and social benefit.In this paper,using the S313 line Ma Qu Yllow River Bridge as the research object,on the bridge to conduct a comprehensive inspection and safety assessment,based on he results of the analysis of the bridge in operation stage of the technology condition and the bearing capacity.The main work and research are as follows:1.Background,significance and purpose of bridge comprehensive detection and security evaluation,research status and main contents of bridge detection,progress and main methods of bridge security evaluation,are introduced briefly.2.To the S313 line Ma Qu Yllow River Bridge conducted a comprehensive inspection,inspection contents include: detection,detecting the strength of concrete and the bridge deck system load test,to obtain more complete information for the detection,Reinforcement design for the Maqu Yellow River bridge,The static and dynamic load test was carried out after the completion of the reinforcement.3.Based on the comprehensive test results of bridge,according to the "code for maintenance of highway"(JTG H11-2004)? "highway bridge technical condition evaluation standard"(JTG /T H21-2011)and Regulations for testing and evaluating the bearing capacity of highway bridges"(JTG/T J21-2011)bridge technical condition evaluation method and standard,first to assess the member of the bridge,and then evaluation of the bridge components,then the deck,superstructure,substructure method were evaluated,finally the general technical condition evaluation of bridge safety evaluation to the whole bridge,Analysis of the reinforcement effect.4.By using the large finite element software MIDAS Civil2015 to establish the grillage model and MIDAS FEA to establish the entity model of space finite element analysis of the bridge.The bridge is to provide reliable theoretical data during the operational phase of the bridge.