既有电气化铁路隧道明洞接长施工关键技术及经济分析

Key Technology and Economic Analysis for Tunnel Extending Construction of In-service Electrified Railway

既有电气化铁路隧道明洞接长施工时,确保既有铁路运营安全是项目施工的核心,在合理安排各专业施工顺序的前提下,重点解决好隧道接长前的四电过渡、线路临时加固及防电拱架台车拱圈浇筑等关键技术尤为重要。石太铁路娘子关三号隧道石家庄端明洞接长,运用了此3项关键技术和经济分析,确保了石太铁路安全运营,加快了施工进度,降低了工程成本,创造了良好的社会信誉。

When in-service electrified railway tunnel needs to connect length,to ensure operation safety is the most important work. Under the precondition of reasonable arrangement of each work sequence,the most important part of the work is the transition for relocation of communications,signaling,electrical,and electrification systems,temporary reinforcement of the railway as well as arch casting for the anti electric arc etc. These three key technical and economic analyses were used for the tunnel construction named Niangziguan Tunnel Ⅲ in Shijiazhuang-Taiyuan Railway. Operation Safety of the Shijiazhuang-Taiyuan Railway was ensured,the construction duration was shortened and the total cost was reduced. The successful execution of the project brought a very good social reputation for the contractor.