既有线提速以来铁路轨道技术的发展

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word文档，中文3200字，英文2000字

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摘要：对既有线提速以来，铁路轨道技术的发展尤其是无碴轨道技术、无缝线路的铺设、轨道设备和道岔结构的加强等进行简要的介绍，对今后铁路轨道的设计提出建议。
关键词：铁路轨道；既有线提速；道岔结构
自1996年铁路既有线首次提速以来，经过5次大面积的提速和秦沈客运专线的建设，不仅使列车运行速度有了较大的提高，同时也带动了铁路技术的进步。尤其是在铁路轨道技术方面，更得到了较快的发展，主要表现在以下几个方面。
Abstract : Existing Line Speed-up time, the railway track technology, in particular the development of ballastless track technology, the installation of CWR, Turnout track equipment and strengthen the structure of such a brief presentation on the future of rail design.
Keywords: railway track; Existing Line Speed-up; Turnout Structures
Since 1996, the first railway line both accelerate, after five major area of the pickup and Qinhuangdao - Shenyang passenger green building, not only train speed has been enhanced, but also contributed to the progress of railway technology. Especially in rail technology, but also the rapid development mainly in the following aspects.