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Experimental investigation into the longitudinal resistance of ballasted railway track
Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit ( IF 2 ) Pub Date : 2020-11-22 , DOI: 10.1177/0954409720975522
Jabbar Ali Zakeri 1 , Kaveh Yousefian 1
Affiliation  

In this paper, a new test method and a measurement technique were proposed to evaluate the track longitudinal resistance (TLR). The three-stage track longitudinal behavior was assessed. The track longitudinal stiffness (TLS) and track longitudinal resistance force (TLRF) were defined based on the analyses of force-displacement curves in each test. Next, the effect of ballast geometry on these two parameters was scrutinized. The resisting mechanism was described. Finally, the share of ballast geometry components in providing the TLS was determined, and contribution percentages were verified by comparing the results with those of previous studies. Nine test conditions were considered. The ballast depth (BD) was set at 30 cm, 40 cm, and 50 cm. In each ballast depth, the TLR was evaluated with and without the crib and shoulder ballasts. The average values of TLS and TLRF were obtained as 22.94 kN/mm and 35.52 kN, and the total share of the base, crib, and shoulder ballast was calculated as 21%, 67%, and 12%, respectively. It was found that the crib ballast had the most impact on the TLS and enhanced the TLS and TLRF up to 4.11 and 3.25 times.



中文翻译:

压载铁路轨道纵向阻力的实验研究

本文提出了一种新的测试方法和测量技术,以评估轨道纵向电阻(TLR)。评估了三阶段轨道的纵向行为。轨道纵向刚度(TLS)和轨道纵向阻力(TLRF)是根据每次测试中力-位移曲线的分析定义的。接下来,研究了镇流器几何形状对这两个参数的影响。描述了抵抗机理。最后,确定了提供TLS的镇流器几何部件的份额,并通过将结果与先前研究的结果进行比较来验证贡献百分比。考虑了九种测试条件。压载深度(BD)设定为30cm,40cm和50cm。在每个压载深度中,对有无婴儿床和肩部压载物时的TLR进行了评估。TLS和TLRF的平均值分别为22.94 kN / mm和35.52 kN,基础,婴儿床和肩式压载的总份额分别为21%,67%和12%。结果发现,婴儿床镇流器对TLS的影响最大,并将TLS和TLRF分别提高了4.11和3.25倍。

更新日期:2020-11-25
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