Linear Control Of Long-span Continuous Rigid Frame Bridge In Construction Stage

Cantilever construction method is one of the main construction methods for modern long-span continuous rigid frame bridge. In order to ensure that the linear and strained condition attain the design demands, we must monitor linear and strained condition in the construction process. And efficient theory of monitoring and computational methods are the keys which need to solve recently.In this paper we choose the linear control in modern long-span continuous rigid frame bridge construction phase as the subject and choose Ren River Special Bridge in BaoMao Highway as the prototype, sum up the theory of monitoring on the construction of long-span PC continuous rigid frame bridge, and then we build the computational model by MIDAS/Civil,which is a special civil engineering design software for structural analysis and optimization. We research impact law and the calculate method by many factors, such as weight, pre-tension, concrete shrinkage and creep, hanging wet weight of concrete and other temporary loads, aftercrop permanent load,etc. This provides a reasonable basis for the elevation in every construction phase in reality.The research of this article is of high reference value to guide the design and construction of the long-span continuous rigid frame bridge, and it has been used in the construction of the Ren River Special Bridge in BaoMao Highway.