Linear Control Research On Single Cantilever Construction Of Continuous Beam Bridge

With the development of our transportation industry in recent years,the ability of Chinese bridge construction is enhancing constantly,the bridge gradually develops in the direction of high pier and long span.But the accompanying problem is the difficulty that we need to overcome is more and more complex,and appearance of cantilever construction has effectively solved this problem,so it is widely used in modern bridge construction.The method of cantilever construction can be divided into double cantilever and single cantilever construction.The so-called single cantilever construction is the method that one side using hanging basket pouring and the other side is using the cast-in-place support during the construction.In addition to the advantages of double balanced cantilever construction,the single cantilever construction method also has good economy benefit,so it is widely used.Because of the bracket to support counter force,single cantilever construction method is different from the traditional double cantilever construction method in the process of construction,and construction procedure have varying degrees of impact on overall consideration and controlling alignment of the bridge.In this paper,by using theoretical analysis and finite element simulation,analyzing the construction process and force features,solving the problems of principle,technology and operations in prestressed concrete continuous beam bridge cantilever construction,draw the corresponding conclusion in the end.taking the reconstruction project of Wusong River Bridge as the project background.Simulating the linear change of the continuous girder bridge under the condition of single cantilever construction,summary box girder section force variation law,Put forward suggestions of linear control for this kind of bridge,finally providing reference for the bridge which uses single cantilever construction.