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摩擦型轨枕道床的横向阻力研究

郭云龙 王新雨 廉栋 宛洪宇 井国庆

郭云龙, 王新雨, 廉栋, 宛洪宇, 井国庆. 摩擦型轨枕道床的横向阻力研究[J]. 西南交通大学学报, 2022, 57(2): 301-305, 368. doi: 10.3969/j.issn.0258-2724.20200464
引用本文: 郭云龙, 王新雨, 廉栋, 宛洪宇, 井国庆. 摩擦型轨枕道床的横向阻力研究[J]. 西南交通大学学报, 2022, 57(2): 301-305, 368. doi: 10.3969/j.issn.0258-2724.20200464
GUO Yunlong, WANG Xinyu, LIAN Dong, WAN Hongyu, JING Guoqing. Lateral Resistance of Frictional Sleeper Ballast Bed[J]. Journal of Southwest Jiaotong University, 2022, 57(2): 301-305, 368. doi: 10.3969/j.issn.0258-2724.20200464
Citation: GUO Yunlong, WANG Xinyu, LIAN Dong, WAN Hongyu, JING Guoqing. Lateral Resistance of Frictional Sleeper Ballast Bed[J]. Journal of Southwest Jiaotong University, 2022, 57(2): 301-305, 368. doi: 10.3969/j.issn.0258-2724.20200464

摩擦型轨枕道床的横向阻力研究

doi: 10.3969/j.issn.0258-2724.20200464
基金项目: 国家自然科学基金(52027813);中国铁建股份有限公司科技研发计划(2018-C51)
详细信息
    作者简介:

    郭云龙(1992—),男,博士,研究方向为轨道工程,E-mail:yunlong.guo@tudelft.nl

    通讯作者:

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

  • 中图分类号: U213.772

Lateral Resistance of Frictional Sleeper Ballast Bed

  • 摘要:

    川藏铁路有砟道床断面尺寸受限,所处环境地震多发、日温差大且变化剧烈,这些情况容易导致横向阻力不足,对无缝线路稳定性和震区轨道韧性提出挑战. 为合理设计轨枕底部设有箭头型凹槽的摩擦型轨枕,并量化其提升无缝线路稳定性与韧性,采用道床横向阻力试验,测量摩擦型轨枕对道床横向阻力增幅情况;合理设计并优化了轨枕底部凹槽,制作了3种不同箭头型凹槽,除去凹槽排列方式不同外,箭头型凹槽面积、尺寸完全一致;并且验证砟肩宽度减小情况下摩擦型轨枕提供的横向阻力是否可以满足川藏铁路运维要求. 结果表明:各型摩擦型轨枕均可增大道床横向阻力,可最少提升横向阻力7%,最高提升21%;单向箭头型双向阻力存在较大阻力值差异,相比于普通轨枕顺向可增大7%,逆向可增大24%,因此在曲线地段铺设时候,应严格注意铺设方向;砟肩宽度由50 cm降低到30 cm,采用单向箭头型轨枕逆向仍然可达到Ⅲ型轨枕砟肩宽度50 cm横向阻力值.

     

  • 图 1  道砟级配

    Figure 1.  Railway ballast particle size distribution

    图 2  3种摩擦型轨枕

    Figure 2.  Three kinds of friction sleepers

    图 3  道床横向阻力测试

    Figure 3.  Transverse resistance test of ballast bed

    图 4  不同轨枕类型横向阻力

    Figure 4.  Lateral resistance of different types of sleepers

    图 5  枕底横向阻力分担情况

    Figure 5.  Lateral resistance sharing of bottom ballast

    图 6  砟肩宽度降低后摩擦型轨枕横向阻力

    Figure 6.  Lateral resistance after reducing shoulder ballast width

    表  1  试验工况

    Table  1.   Test conditions

    工况编号轨枕类型砟肩宽度/cm边坡坡度枕心
    A1Ⅲ型501∶1.75
    A2单向箭头(顺、
    逆向推动轨枕)
    501∶1.75
    A3内括箭头501∶1.75
    A4外括箭头501∶1.75
    B1单向箭头301∶1.75
    C1Ⅲ型00
    C2内括箭头00
    C3外括箭头00
    C4单向箭头(顺、
    逆向推动轨枕)
    00
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-07-31
  • 修回日期:  2020-12-17
  • 网络出版日期:  2021-08-07
  • 刊出日期:  2021-01-06

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