Research On Construction Control Of(60+100+60)M Three-span Prestressed Concrete Continuous Beam Bridge In Hefei-Fuzhou High-speed Railway

During the ten years,In order to meet the needs of China’s economic construction and development, The high-speed railway developed rapidly. There are a lot of common features of the high-speed railway that have been built and are building. The bridges have a large percentage of the all line. Continuous girder bridge is used so widely. It has a lot to do with the smooth and comfortable, high stiffness, good seismic performance, long-term deflection. It is precisely because of these characteristics, application of continuous beam bridge has been getting such a large range in high speed railway. In the continuous beam bridge, Middle and small span combination of three span continuous girder bridge have a large proportion. The span that three span60m+100m+60m continuous beam bridge is a classic Bridge.This thesis combines the common high-speed railway60m+100m+60m three span prestressed concrete continuous beam bridge——He Fu Gao Tie xi River Bridge Construction Monitoring Project.The river bridge main beam body shape and internal force influence factors in the process of the cantilever construction are discussed. Factors include the construction of temporary load, two load, prestress, concrete shrinkage and creep, temperature, humidity, loading age. Focus on the analysis of main factors of elastic modulus of concrete, concrete density, presstressed tension and other high worth on the degree of influence of Xihe bridge theory precast. Research the development rule of the shrinkage strain of concrete in the early by making concrete specimens. Discuss the linear and the variation regularity of the internal forces in the same length of cantilever when the different span continuous beam bridge. We carry out a comparative analysis Monitoring Results of West River Bridge. I hope this research for future river bridge construction control have positive effects.