跨既有线铁路结合梁施工技术

研究目的：跨既有铁路的施工在我国当前铁路建设中占有很大的比例。兰武二线古浪河大桥横跨既有铁路，本文通过对此桥32m结合梁施工实例的介绍，为类似工程的施工提供经验。研究结果：在兰武二线古浪河大桥的结合梁施工中，采用相应的施工方案，使工程建设安全可靠，顺利完成。研究结论：既有线桥梁施工中施工方法的选择、施工步骤的确定及现场的施工组织和安全管理必须规范，方能取得良好效果。

Construction Technology for Composite Girder across Existing Railway Line

Research purposes: The construction of works across existing railway lines takes up a significant proportion of the current railway construction in China.This paper introduces the case of construction of 32 m composite girder of Gulang River Bridge on the second line of Lanzhou-Wuwei Railway across the existing railway line to give more experiences to other similar works in construction.Research results:In the construction of composite girders of Gulang River Bridge on the second line of Lanzhou-Wuwei Railway,the corresponding construction proposal is adopted to ensure the safe,reliable and successful construction of this project.Research conclusions:The selection of construction methods,determination of construction procedures,on-site construction organization and safety control for bridges across existing lines must be standardized so as to get good effects.