铁道科学与工程学报2017，Vol.14Issue(9)：1838-1844,7.
高速铁路桥隧过渡段钢轨温度和横向变形试验
Experiment on temperature and lateral deformation of rail at the transition between bridges and tunnels for high-speed railway
摘要
Abstract
In recent years, according to on-site observation, it is found that CWR in ballastless track will produce lateral deformation in sporadic bending form. For high speed railway, it is easy to stimulate hunting motion of locomotive and rolling stock and has a great impact on driving stability, comfort and safety. The transition between bridge and tunnel in Hefei-Fuzhou high-speed railway was taken as the object of study, the rail temperature and its lateral deformation were tested and analyzed continuously for a long term, and the results shows: There is a temperature difference of over 20 ℃ in the range of no more than 10 m of the rails, which will have influence on rail deformation; The lateral deformation of rail changes periodically with the increase and decrease of day temperature, the maximum of daily fluctuations is 0.25 mm; The lateral deformation of the rail shows a cumulative increase over time, the cumulative deformation is 0.5~2 mm or so and the cumulative rate is-0.016 32~+0.004 32 mm/d; Both of the left and right rails take on sporadic bending wavelength of 4 times than the fastener spacing and there exists maximum amplitude of 2 mm and gauge irregularity of -1.0 mm~+1.3 mm. Research findings attach guiding significance to revealing the mechanism of lateral deformation of rail,improving the ride comfort of ballastless track and ensuring the stability of the ballastless track lines, as well as safety and comfort of driving.关键词
无砟轨道/无缝线路/轨温/钢轨横向变形/试验Key words
ballastless track/continuously welded rail track/rail temperature/lateral deformation of rail/test分类
交通工程引用本文复制引用
饶惠明..高速铁路桥隧过渡段钢轨温度和横向变形试验[J].铁道科学与工程学报,2017,14(9):1838-1844,7.基金项目
高速铁路基础联合基金资助项目(U1334203,U1434204) （U1334203,U1434204）
中国铁路总公司科技研究开发计划课题资助项目(2014G001-D) （2014G001-D）
南昌铁路局科技研究开发计划课题资助项目(201524) （201524）
