无缝道岔是跨区间无缝线路的重要组成部分，能显著提高列车运行速度和平稳性。
The jointless switch is an important component part of jointless track across sections, it can notably raise the train running speed and the regularity.
本文假定跨区间无缝线路中的无缝道岔为一结构体系，岔枕为连续弹性基础上的有限长梁。
This paper assumes that the welded turnout in the continuously welded rail track is a structural system, and the railway tie in the welded turnout is a beam on the continuously elastic foundation.
跨区间无缝线路，即轨条与轨条、轨条与道岔直接焊接，轨条之间直接传递纵向力和位移。
Cross sector seamless line, namely rail bar, rail bar and rail switch direct welding; the vertical force and displacement are direct transmitted between rail bars.
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