Research on The Construction Technology of The Cantilever Widening of The Long-Span Continuous Box Girder Bridge
With the continuous growth of traffic flow,many large-span continuous box girder bridges are facing traffic pressure and widening needs.Based on this,this article proposes research on cantilever widening construc-tion technology for large-span continuous box girder bridges.Precompression construction by a cantilever installa-tion,prestressing construction,and cantilever forward movement,and based on this,expand the cantilever section to determine the construction process flow.According to the actual construction conditions,static load force tests are carried out on the selected test points in the project.Through testing,it is found that the maximum deformation modulus of the cantilever arm of the construction bridge is 2 996 kPa,which is much lower than the design re-quirements and meets the construction requirements.
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维普
