大西客运专线渭洛河特大桥连续梁跨越既有电气化铁路施工防护

Construction Protection of a Large-span Continuous Beam Bridge on Datong-Xi'an PDL Crossing an Existing Electrified Railway

基于电气化铁路接触网的防护特点,借鉴以往临近既有铁路施工经验,总结阐述客运专线大跨度连续梁多次跨越既有电气化铁路施工时需要特殊考虑的因素和要点,并结合本工程的实际情况,从施工准备、接触网防护的要求及解决方案、需要封锁铁路作业的项目及施工安全的把控重点等几个方面作出总结。通过实践,重点提到的几个方面在实际施工中成功应用,取得良好效果。

Based on the protection features of electrified railways and the past experience of construction near existing railways,this paper describes factors and key points requiring special consideration when the large-span continuous beam bridge on PDL crosses over an existing electrified railway several times.According to the actual conditions of the project,preparation of construction,protection solutions for catenaries,items involving blocking the railway and key control points of construction safety are summarised.The above-mentioned aspects have been proved successful in the actual implementation with good effects achieved.