Abstract：Research purposes：The bridge girder erecting machine JO450 is a special construction machine developed for intercity railway. The machine adopts multi-leg structure and synchronous lifting girder's operational mode. This paper describes the key points in application of the machine, introduces the machine's technical parameters, andoperational process and support requirement of the machine for the erecting girder and passing span, and sums up the machines' characteristics for providing the reference and revelation the girder erection for intercity railway.
Research conclusions：The multi-leg structure of the machine can meet the need of many kinds of variable-mutual girder with easy switching operation and high construction efficiency. The gantries' operation mode of synchronous lifting girder can reduce the occupation time to the girder carrier and improve the girder carrying efficiency. The big lateral moving beam of the gantry meets the requirement of lowering girder without moving the girder by pier and reduces the labor strength. The machine vertically moves on the rail with stable moving. The application verifies this machine has reasonable structure with high efficiency of erecting girder and can solve the difficult problems in erection of multi-box girder successfully.
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2010, Vol. 27 
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