通过既有线铁路提速试验，分析了上承钢板梁横向刚度的要求，提出合理的加固方案。
To analyse the demand of transverse rigidity and the strengthening scheme of deck plate girder according to the raising speed experiment of the existing track.
施工为例，较为详细地介绍了铁路既有线改造工程并行段桥涵施工中采用挖孔桩防护的设计原理。
Give a more detailed description of the design principle that used protection with dug pile in transformation of existing railway bridge and culvert construction in parallel paragraph.
针对GPS实时动态定位技术在铁路勘测中的应用，提出连续三角网重复设站测量既有线的方法。
A new surveying method with GPS RTK technique is proposed for the existing railway by overlapped stations in continuous triangle networks.
既有铁路曲线整正是既有线改建设计中的重要部分，且结果直接影响最终设计质量和运营安全。
Existing railway curve realignment is an important part of existing railway reconstruction design, and the result directly affects the design quality, project cost and operation safety.
对公路、铁路、城市改造、既有线大跨径顶进施工有一定指导意义。
These have certain guiding significance for the construction of big span goring advance in highway, railway, city transform and already have lines.
韩宝明：您说的，确实高速铁路的建设成本非常高，那么在铁路经营方面，它的票价定的相对比既有线的要高。
Han Baoming: Like you said, the cost of high-speed railways is very high, so their tickets are more expensive than conventional trains.
随着铁路客运专线建设的快速推进，必然带来客运专线与既有线、其他运输方式间的旅客联合运输管理问题。
Along with the rapid progress of PDL construction, the problem emerges concerning management of combined passenger transport among PDL, conventional line and other transport modes.
框架桥顶进在既有线施工中是较常见的一种施工方式，已经在铁路工程施工中广泛应用。
Skeleton frame bridge jacking method is a frequently adopted practice in the construction of existing railway lines.
通过验证，效果较好，为进一步完善铁路既有线改建优化设计理论和方法创造了条件。
Railway practice shows that this creates a condition for improving the optimum design theory of the existing r…
经过五次提速我国铁路开始融入了世界既有铁路提速浪潮，缩短了与发达国家既有线列车运行速度的差距。
The disparities of train speeds in existing line with developed country have been shortened through five times speed-up in the railway of our country.
经过五次提速我国铁路开始融入了世界既有铁路提速浪潮，缩短了与发达国家既有线列车运行速度的差距。
The disparities of train speeds in existing line with developed country have been shortened through five times speed-up in the railway of our country.
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