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Investigations on ballastless tracks in tunnel without reinforcement

机译:无加固隧道无ast轨道研究

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Ballastless track systems have delivered an optimal performance in the past decades. This ideal comes from the Continuously Reinforced Concrete Pavement or the Jointed Plain Concrete Pavement in road design. It can be deduced that a well-proved system for road pavement is applicable to ballastless track design after certain modifications, which could save materials and simplify the construction work as well. In this pa- per, a feasibility study of ballastless track forms, in which neither reinforcement nor dowel bars shall be ap- plied have been investigated using Finite Element Analysis. The results show that this idea is feasible in long tunnel with hard and stabile substructure, if a joint spacing less than 4 m can be realized. Meanwhile, these kinds of systems cannot be applied for track with soft substructures such as mass-spring-systems, in which continuous double-layer-reinforcement and sufficient thickness of the track concrete layer are required.
机译:在过去的几十年中,无轨道系统实现了最佳性能。此理想来自于道路设计中的连续钢筋混凝土路面或节理的普通混凝土路面。可以推断出,经过一定改进的道路铺设系统可适用于无ball轨道的设计,经过修改后,既可以节省材料,又可以简化施工工作。在本文件中,使用有限元分析研究了无ball轨道形式的可行性研究,其中既不采用钢筋也不采用销钉。结果表明,如果节理间距小于4 m,这种思想在具有坚硬稳定子结构的长隧道中是可行的。同时,这些类型的系统不能应用于具有软质子结构的轨道,例如质量弹簧系统,在这种情况下,需要连续的双层钢筋和足够厚度的轨道混凝土层。

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