JQ450型架桥机在广珠城际轨道交通线中的应用

Application of Bridge Girder Erecting Machine JQ450 in Construction of Guangzhou-Zhuhai Intercity Railway

研究目的:JQ450架桥机是针对城市轨道交通建设研制开发的特种施工设备,整机采用多支腿结构型式,同步起吊取梁作业方式。本文针对该设备特点及在实际应用中的要点,介绍JQ450架桥机的技术参数及在广珠线架梁和过孔的作业程序、支撑要求,总结该设备的性能,为城际铁路架梁施工提供参考和启示。研究结论:JQ450架桥机整机的多支腿结构适应多种变跨梁的需要,且转换方便,施工效率高。起重小车同步起吊取梁作业方式,减少了对运梁车的占用时间,提高了运梁车运梁效率,起重小车大横移梁,满足了双线三箱以下的落梁,无需墩台移梁,降低了劳动强度。整机采用轮轨纵移,运行平稳。通过使用验证,该架桥机作业效率高、结构合理,成功解决了多箱梁体架设的难题。

Research purposes： The bridge girder erecting machine JQ450 is a special construction machine developed for intereity 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, and operational process and support requirement of the machine for the erecting girder and passing span, and sums up the maehine~ characteristics for providing the reference and revelation the girder erection for intereity 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.