Research On Construction Control Of The Asymmetric Steel Rare-cable-stayed Truss Girder Bridge With Single Tower And Single Cable Plane

This text relying on the Qiansimen Jialing Bridge, to research the constructiontheory and method of the asymmetric steel rare-cable-stayed truss girder bridge withsingle tower and single cable plane in complex construction course. It will be ofimportance in guiding the similar project’s design and construction.Qiansimen Jialing Bridge which is single tower single cable plane asymmetricacross steel truss girder cable—stayed bridge and it draw support the temporary cablesand temporary pier in construction, and it precast with the truss rods cantileverconstruction cantilever erection and closure frame bridge. It makes the main girderlinetype of bridge and space form, tower tip displacement, cable force constructioncontrol techniques and closure construction control techniques complex in construction.At the base of analyze the emphasis and difficulty in construction control and researchthe cantilever construction control and closure construction control, and constructanalysis model with structural engineering software Midas/Civil toforward-calculation method and inversion calculation method of all construction stepsinclude installing and demolition of temporary cables and temporary pier, then get themanufacturer linetype and installation elevation of all segments. In additional, it haveanalyzed the factor that effect closure and sensitive to make the measure for closureadjustment. According to contrast analyze the main girder linetype, cable force, towertip displacement and relevant theoretical value, inspect the accuracy and suitability of allconstruction steps in construction, to get the contrast analyze for linetype of the finishedbridge, the main girder stress and design value finally. However, it indicate theconstruction method and simulating analysis are correct through the consistency.