A certain overpass railway bridge was composed of a(82.5+82.5)m full width prestressed con-crete variable height T-shaped box girder,with a single-sided swivel cantilever length of 77m,a bridge deck width of 25m～31.52m,and a designed swivel tonnage of 26000 tons.To balance the longitudinal and trans-verse unbalanced weight caused by asymmetric width,asymmetric design was adopted for the thickness of the left and right main span web plates and the transverse bulkhead;To meet the requirements of the construction period,the rotating cantilever was designed with three large segments;The stress analysis of the rotating struc-ture was simulated in response to unbalanced bending moments such as wind loads during the construction peri-od.The feasibility of the structure was verified through construction and structural analysis.All performance in-dicators of the structure meet the requirements of the specifications,and the bridge generated good social and economic benefits in practical engineering applications.It can provide reference for similar rotation schemes.
Bridge engineeringRotation constructionVariable width continuous beamVertical and hor-izontal asymmetrySimulation analysis
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