900 t铁路架桥机是高速铁路及客运专线桥梁建设中使用的关键设备。目前，国内在铁路架桥机钢结构的 制造及焊接工艺方面，还没有专门的规范或规程。通过对几种国家和行业规范或规程焊接工艺标准的对比、分 析，对900 t铁路架桥机钢结构的焊接工艺提出一些参考性意见。

900 t railway bridge girder erecting machine is a key equipment for construction of high -speed railway and passenger dedicated line. At present, there is not special technological criterion or specification in China for manufacturing and welding steel structure of railway bridge girder erecting machine. The reference ideas are presented in this paper on welding technology for 900 t railway bridge girder erecting machine through comparison and analysis of several state and trade technological critorions and standards.