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随着城市和农村交通运输日益发展的需要,在通车线路下增建立交桥、地道或通航箱涵的任务也愈来愈多,目前均广泛采用顶进法或开挖法施工。而用这个方法进行施工时,必须先对线路进行加固,以保证施工过程中的线路稳定和列车的不间断运行。线路加固的方案很多,选择的加固方案应对运输干扰较小而又确保铁路运输的绝对安全,同时施工又要简单易行。我段在沪宁复线的几座小跨度箱涵顶进或开挖施工中,均采用工字钢便梁(或简称便梁)加固线路,便梁就位后次日即取消慢行,并在允许列车以正常速度通过施工地段的情况下进行顶进(或开挖)施工任务。今将沪宁线上
With the increasing demand of transportation in urban and rural areas, more and more tasks are required to build overpasses, tunnels or navigable culverts under the existing traffic lines. At present, both the jacking method and the excavation method are widely used. While using this method to carry on the construction, must strengthen the line first, in order to guarantee the line stability in the construction process and the train uninterrupted operation. There are many solutions for the reinforcement of the lines. The selected reinforcement solution should be less harmful to the transport and ensure the absolute safety of the railway transportation. At the same time, the construction must be simple and easy. I paragraph in Shanghai-Nanjing double-line multi-span box culvert jacking or excavation construction, are used I-beam (also referred to as the casual beam) to reinforce the line, put the beam in place the next day to cancel the slow-moving, and The jacking (or excavation) construction task is to be carried out while allowing the train to pass the construction site at normal speed. Shanghai-Nanjing line now