低净空钢桁梁桥处接触悬挂特殊设计研究

Researches of Special Design of Contact Suspension on Steel Truss Bridge with Low Clearance

既有铁路电气化改造工程设计中会遇到各类低净空的钢桁梁桥,针对不同的桥梁形式需因地制宜地采用不同处理方案。大莱龙铁路电气化改造项目中通过对不同方案进行对比分析,确定了低净空钢桁梁桥下接触悬挂的通过方案,满足二级超限货物列车通行的基本限界、装载要求,为以后类似既有线电气化改造接触悬挂设计提供方案借鉴。

Design of railway electrification reconstruction engineering will inevitably encounter various low clearance steel truss bridges,and the corresponding schemes should be made accordingly for steel truss bridges of different types.The scheme has been finalized for contact suspension passing through the steel truss bridge with low clearance for Dalailong railway electrification reconstruction project,on the basis of the comparison and analysis of the different schemes,meets the requirements of fundamental construction gauge for passing through of out-of-gauge freight train of second grade and its requirements of loading,providing references for design of similar contact suspension of electrification reconstruction of existing railway lines in the future.