CRTSⅠ型双块式无砟轨道冬季温度场试验  

Temperature Field Test of CRTSⅠTwin-Block Ballastless Track in Winter

作　　者：杨荣山[1] 万章博 刘学毅[1] 张重王 赵坪锐[1] 

机构地区：[1]西南交通大学高速铁路线路工程教育部重点实验室,四川成都610031

出　　处：《西南交通大学学报》2015年第3期454-460,共7页Journal of Southwest Jiaotong University

基　　金：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)

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.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 CRTS I twin-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.

关 键 词：双块式无砟轨道 道床板 温度场 现场试验 

分 类 号：U213.2[交通运输工程—道路与铁道工程]