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有砟道床梯形轨枕横向阻力试验与构成分析

井国庆 贾文利 强伟乐 卢炜

井国庆, 贾文利, 强伟乐, 卢炜. 有砟道床梯形轨枕横向阻力试验与构成分析[J]. 西南交通大学学报, 2019, 54(1): 9-13. doi: 10.3969/j.issn.0258-2724.20170481
引用本文: 井国庆, 贾文利, 强伟乐, 卢炜. 有砟道床梯形轨枕横向阻力试验与构成分析[J]. 西南交通大学学报, 2019, 54(1): 9-13. doi: 10.3969/j.issn.0258-2724.20170481
JING Guoqing, JIA Wenli, QIANG Weile, LU Wei. Ladder Sleeper Lateral Resistance Test and Contribution Analysis of Ballasted Track[J]. Journal of Southwest Jiaotong University, 2019, 54(1): 9-13. doi: 10.3969/j.issn.0258-2724.20170481
Citation: JING Guoqing, JIA Wenli, QIANG Weile, LU Wei. Ladder Sleeper Lateral Resistance Test and Contribution Analysis of Ballasted Track[J]. Journal of Southwest Jiaotong University, 2019, 54(1): 9-13. doi: 10.3969/j.issn.0258-2724.20170481

有砟道床梯形轨枕横向阻力试验与构成分析

doi: 10.3969/j.issn.0258-2724.20170481
基金项目: 国家自然科学基金资助项目(51578051)
详细信息
    作者简介:

    井国庆(1979—),男,副教授,博士,研究方向为轨道结构及轨道力学,电话:15901173048,E-mail: gqjing@bjtu.edu.cn

  • 中图分类号: U213.772

Ladder Sleeper Lateral Resistance Test and Contribution Analysis of Ballasted Track

  • 摘要: 梯形轨枕具有稳定性好、振动小的优点,并能减弱传递给轨道的动荷载,使得梯形轨枕在高速铁路、重载铁路、城市轨道交通中均有较好表现,但是其横向阻力一直未进行系统试验研究. 本文研究了不同砟肩宽度(200、300、400、500 mm)梯型轨枕道床横向阻力,分析了阻力构成,并与Ⅲc型轨枕对比. 结果表明,在砟肩宽度均为500 mm道床上,平肩式梯形轨枕与平肩式及砟肩堆高150 mm、Ⅲc型轨枕相比,阻力分别提升了约55%、14%,并且,平肩式道床砟肩宽度由200 mm增加至500 mm过程中,梯形轨枕道床横向阻力无明显增长,其横向阻力主要由3部分构成,其中轨枕底面与道床摩擦提供约34%,枕心部位提供约47%,轨枕端部提供约19%. 试验表明,采用梯形轨枕,可选用较小截面尺寸的道床,从而大幅节约建设用地及道砟用量.

     

  • 图 1  梯形轨枕

    Figure 1.  Ladder sleeper

    图 2  反力装置

    Figure 2.  Counterforce device

    图 3  横向阻力现场测试

    Figure 3.  Lateral resistance in situ test

    图 4  梯形轨枕与Ⅲc型轨枕对比

    Figure 4.  Comparison between ladder sleeper and Ⅲc sleeper

    图 5  砟肩宽度对梯形轨枕道床横向阻力的影响

    Figure 5.  Influence of shoulder width on ladder sleeper lateral resistance

    图 6  枕心高差影响

    Figure 6.  Influence of crib height on ladder sleeper lateral resistance

    图 7  轨枕横向阻力构成

    Figure 7.  Constitution of lateral resistance

    表  1  工况类型

    Table  1.   Test condition

    工况 砟肩宽度/mm 砟肩堆高/mm 枕心高差 轨枕类型
    R1 500 150 饱满 Ⅲc型
    R2 500 0 饱满 Ⅲc型
    A1 500 0 饱满 梯形
    A2 400 0 饱满 梯形
    A3 300 0 饱满 梯形
    A4 200 0 饱满 梯形
    B1 饱满 梯形
    B2 降低40 mm 梯形
    B3 降低50% 梯形
    B4 0 梯形
    下载: 导出CSV

    表  2  梯形轨枕阻力分担

    Table  2.   Ladder sleeper lateral-resistance constitution

    阻力部分 计算来源 横向阻力/(kN•m–1 所占比例/%
    总值 A1 18.31 100
    枕底 B4 6.21 34
    端部 A1、B1的差值 3.55 19
    枕心 B1、B4的差值 8.55 47
    下载: 导出CSV
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出版历程
  • 收稿日期:  2017-06-30
  • 修回日期:  2018-01-02
  • 网络出版日期:  2018-05-30
  • 刊出日期:  2019-02-01

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