摘要
无缝线路锁定轨温控制是保障轨道结构稳定的关键技术。针对高温环境下换铺无缝线路施工中长钢轨难以一次锁定至设计轨温范围的技术难题,本文结合物理学、流体力学、弹性动力学以及热力学理论,对长钢轨浇水降温铺设技术进行理论分析,并指导实际施工。建立钢轨浇水降温模型,分析钢轨温度、温度应力、钢轨回缩变化量等的变化过程。结果表明:长钢轨浇水降温铺设技术实施工况下,理论计算结果与有限元计算结果基本一致。工程实践验证了该技术可有效将轨温调整至设计锁定轨温范围,为高温环境无缝线路换铺施工提供了温度调控工艺和理论依据。
Locking rail temperature control of CWR is the key technical link to ensure the stability of track structure.In view of the technical problem that long rails are difficult to lock to the design rail temperature range at one time during the construction of CWR under high-temperature conditions.Based on the theory of physics,fluid mechanics,elastodynamics and thermodynamics,this paper made a theoretical analysis on the technology of long rail laying by watering and cooling,and guides the actual construction.At the same time,the model of rail watering and cooling was established,and the change process of rail temperature,temperature stress and rail retraction was analyzed.The results show that the theoretical calculation results are basically consistent with the finite element calculation results under the working condition of long rail watering and cooling laying technology.The engineering practice shows that this technology can effectively adjust the rail temperature to the designed locked rail temperature range,which provides the temperature control technology and theoretical basis for CWR laying construction in high temperature conditions.
作者
王兴东
WANG Xingdong(Jiayuguan Track Division of China Railway Lanzhou Bureau Group Co.Ltd.,Jiayuguan Gansu 735100,China)
出处
《铁道建筑》
北大核心
2025年第8期101-107,共7页
Railway Engineering
关键词
无缝线路
钢轨
浇水降温
理论研究
锁定轨温
有限元分析
continuous welded rail(CWR)
rail
cooling by watering
theoretical research
locking rail temperature
finite element analysis
作者简介
王兴东(1974-),男,高级工程师。E-mail:7450422@qq.com。
