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1994年国家决定投资修建宝成复线电气化铁路。在既有电气化铁路线上进行复线电气化建设改造,要比常规修建新线遇到的困难更多。它是在繁忙的电气化运营线路上交叉施工,新旧线换边相互过渡,既要换掉旧线路上的杆塔及接触网悬挂和导线,又要同时建好复线上新的接触网;它是在高空、高电压、高速列车运行情况下的施工,要绝对保证运营线路不受影响、接触网运转正常和列车畅通无阻。而且要做
In 1994, the state decided to invest in the construction of Baocheng double-track electrified railway. In the existing electrified railway line electrification construction of double-track electrification, than the conventional construction of new lines encountered more difficulties. It is cross-circuit construction in the busy electrified operation line, the old and the new line change the edge of each other’s transition, it is necessary to replace the old lines of the tower and catenary suspension and wire, but also build double the new catenary network; it is High altitude, high voltage, high-speed train operation under construction, we must absolutely ensure that the operation of the line is not affected, the contact network is functioning and the train is smooth. And do it