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一、接触网改扩建国内总体概况和特点 接触网改扩建是指对既有电气化铁路运营的接触网进行改造、扩容等施工。国民经济的快速发展,对有大动脉之称的铁路运输能力和技术水平的要求也越来越高,根据国家铁路政策和铁道部科技发展的总体部署,除继续对一些长大干线进行电气化建设外,还要对既有电气化铁路进行技术改造,有的需要大修更换设备,有的需要扩能提速,有的需要增建二线甚至三线等等,而改造的主要对象是接触网。由于我国行
First, the contact network reform and expansion of the domestic general situation and characteristics Contact network expansion refers to the existing electrified railway operation of the contact network transformation, expansion and other construction. According to the national railway policy and the overall deployment of scientific and technological development of the Ministry of Railways, in addition to continuing the electrification of some of the major trunk lines, the rapid development of the national economy demands more and more high-level railway transport capabilities and technologies. , But also on the existing electrified railway technical transformation, and some need to overhaul the replacement of equipment, and some need to speed up expansion, and some need to build two or even three lines, etc., while the transformation of the main object is the contact network. Because of my trip