Abstract：Abstract：Research purposes： Expansion rail joints of medium-low-speed maglev are used as connecting devices which are installed at the location of expansion joints between two track panels. According to the ability of fitting the rail gap, this kind of devices are classified as modelⅠ, modelⅡ and modelⅢ. For the construction of medium-low-speed maglev operation line, a research on regulation of interaction between the track panel and the base is needed to be done, then the law of arranging expansion rail joints can be proposed and the structure can be optimized. Research conclusions： (1)The expansion displacement between track panels in the middle of the beam is relatively small, so modelⅠcan be adopted to meet the displacement. (2)The expansion displacement between track panels in the end of the beam is mainly affected by the temperature span of the bridge. When choosing the expansion rail joint, the temperature span of the bridge, the temperature condition around and the creeping of the concrete should be taken into consideration. (3)New kinds of expansion rail joints are proposed, including modelⅠ, modelⅡ and modelⅢ, which have already been used in Changsha maglev railway project. (4)The research of this paper is of great significance for picking and designing rail joints of maglev track.
2017, Vol. 34 
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