Study On The Control Of The Jialing River Bridge Of Prestressed Concrete Continuous Girder Linear

In recent years, with the rapid growth of China’s economy, promote the rapid development of railway transportation in our country, but also to promote the rapid development of High-speed Railway Prestressed Concrete Continuous Beam bridge. The structure of this kind of bridge has low cost, fast construction speed, the stiffness of the structure is high, with sufficient strength and rigidity to ensure high-speed train passed. At present, the construction method of continuous beam bridge by cantilever casting method at home and abroad. During the construction of cantilever, the beam going through a complex stress process. At the same time, there are a series of factors that influence the stress, displacement and the structure of the internal temperature of the bridge in the whole construction process. These factors have on the bridge of the strength, stiffness and durability greatly influence. In order to ensure the continuous girder can meet the quality requirements of the project and the construction control is essential.Based on the summary of the domestic and foreign development of prestressed concrete continuous beam bridge construction control technology and development trends, technologies of construction control for prestressed concrete continuous girder bridge is studied. Expounds the contents and methods of construction control, and several key problems in construction control.This research subject in the Jialing River bridge prestressed concrete continuous beam bridge as the engineering background, on the basis of the characteristics of the construction control of prestressed concrete continuous beam b ridge, establishes a comprehensive monitoring system. In the research process, the use of calculation software MIDAS/CIVIL, the construction process of the continuous beam is simulated and analyzed. At the same time, in the process of construction control, the successful acquisition of 9# 10# pier, pier 0# block ~ 7# block section deflection monitoring and 0# block 3# stress monitoring data, and these data and the theoretical data were analyzed and compared, although the measured data and the theoretical da ta with errors, but these errors are within the the controllable range so that the structure of the overall performance and in good working condition. And to provide reference for health monitoring of bridge.