The Construction Control Analysis of Long-span Cantilever Construction for Continuous Rigid Frame Bridge

With reference to the construction control of 440 m continuous rigid frame spans of Danshuihe Bridge,the analysis of the causes of deflection deformation of box girders in construction of long-span continuous rigid frame bridges are presented,necessity,methods,accuracy,some effective measures and results of the monitoring are presented. The closures of bridge are all finished naturally,and the closure errors are in the criterion value 2 cm.The deck alignment of completed stage is so smooth that it matches with the design alignment well. It ensures that the safety of the bridge construction,to provide references for similar projects.