Abstract：Research purposes:The current upper movable mould can not pass the span until the final tension on stress of box girder is completed and the final tension on stress of box girder can not be executed until the concrete gets to 100％of designed strength．However，the upper movable mould could not pass the span until at least 1 1 days after the completion of concreting girder．Thus such a long time awaiting for passing span can not meet the requirement of construction schedule．
Research conclusions: Through emulation analysis and calculation，the movable mould can pass the span in advance and the time of erecting girder for one span with movable mould Call be shortened to 1 1 days from 1 8 days by tensioning partial stress to bear the weights of girder and movable mould when the poured concrete gets to 80％of designed strength after 3 or 4 days of concreting the girder．So the construction process is speeded up and the requirement of construction schedule can be met．
吴荣锋. 移动模架造桥机提前过孔技术的分析及应用[J]. 铁道工程学报, 2009, 26(7): 57-61.
WU Rong—feng. Analysis of the Technology for Passing Span in Advance of Movable Mould Bridge Girder Erecting Machine and Its Successful Application. 铁道工程学报, 2009, 26(7): 57-61.
2009, Vol. 26 
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