CRTSⅠ型双块式无砟轨道冬季温度场试验

doi:10.3969/j.issn.0258-2724.2015.03.011

基金项目:

国家973计划资助项目(2013CB036202)

国家自然科学基金资助项目(51008258,52178431)

中央高校基本科研业务费专项资金资助项目(SWJTU12CX065)

详细信息

作者简介:
杨荣山(1975-),男,副教授,博士,研究方向为高速重载轨道结构与轨道动力学,E-mail:yrs123@sohu.com

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出版历程
- 收稿日期:2014-07-23
- 刊出日期:2015-06-25

Temperature Field Test of CRTS Ⅰ Twin-Block Ballastless Track in Winter

摘要

摘要:为探讨无砟轨道结构温度场分布,通过对成都地区CRTSⅠ型双块式无砟轨道结构冬季温度场监测,分析了不同天气轨道结构温度场的变化规律.基于数理统计方法,提出了成都地区双块式轨道道床板冬季垂向温度荷载模式.研究结果表明:道床板昼夜温度变化较大,支承层温度变化较小,道床板表面最大温差17.50 ℃,支承层底面最大温差0.35 ℃;随深度增大,温度变化幅值减小,道床板温度峰值滞后于气温峰值;轨道结构最大正温差出现在14:30左右,最大负温差出现在约08:00;道床板温度沿深度呈指数函数关系.
- 双块式无砟轨道/
- 道床板/
- 温度场/
- 现场试验
Abstract:In order to investigate the temperature distribution of ballastless track, the variation of track structure temperature field in different weather situations was analyzed from the temperature field monitoring of CRTSⅠtwin-block ballastless track in winter in Chengdu. Based on the mathematical statistics method, the temperature load mode of ballastless track slab located in Chengdu was put forward. The test result shows that temperature in track slab changes dramatically in a day, but temperature in hydraulic bonded layer changes slowly; the maximum temperature difference on track slab surface is 17.50 ℃, and it is only 0.35 ℃ in the hydraulic bonded layer; the changing rate of temperature in track decreases with depth, and the peak of temperature in track appears later than the peak of air temperature; the maximum positive temperature difference of track structure appears at about 14:30, and the maximum negative temperature difference appears at about 08:00; temperature in track slab assumes an exponential function relation along the depth.
- twin-block ballastless track/
- track slab/
- temperature field/
- site test

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参考文献 (39)

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文章访问数:1153
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