Long-span Prestressed Concrete Continuous Girder Bridge Construction Control Analysis

With the continuous development of traffic construction industry in our country, thelong-span prestressed concrete continuous girder bridge is increasingly become one of themain structure form of the bridge construction. This bridge spanning ability strong, under thesame span Bridges, its simple structure, reasonable stress, theoretical research andconstruction technology is relatively mature, the construction cost is economic and reasonable,and the design, analysis and calculation is simple, is a kind of bridge structure form of highcost performance. Therefore, in recent years has been widely used in the construction of thebridge.Construction monitoring as the long-span prestressed concrete continuous girder bridgeconstruction is an important part of the bridge construction plays a key role in theconstruction monitoring quality, directly affects the quality of bridge construction and bridge.As a result, the study of construction monitoring analysis is an important subject.Based on hongqi village of Yellow River bridge as an example, this paper use bridgefinite element software Midas Civil simulation calculation, and collect measured datacomparative analysis, based on construction monitoring and control calculation. Theory thereare several ways to calculate construction monitoring of structure calculation methods usingformal calculation method, the application of least square method and kalman filter method isused to identify the parameters calculation, selection of parameters for the density of concrete,concrete density. Discreteness is stronger, based on the stress data in the actual measurementis indirectly obtained by strain data calculation, the existence of certain calculation error, andthe measured strain data accuracy is not high, often as a result, the hongqi village, this articleUSES the linear data of Yellow River bridge (prefabricated camber, elevation, etc.) calculatedanalysis, namely the linear monitoring is calculated. Then, compare the two methods,combining with the actual construction situation, to the difficulty of the method, accuracy andoperability, etc factors, the calculation is relatively simple, analysis results and the actualsituation is close to the least square method for long-span prestressed concrete continuousgirder bridge construction control calculation of optimization methods. Finally, the paper putsforward the method of least squares in the application to the direction of further study.