高速铁路轨道结构理论研究进展

Research Progress on Track Structure Theory of High-speed Railway

轨道结构安全服役的关键理论研究是确保我国大规模高速铁路路网高效运营的重大基础性工作,本文针对我国高速铁路轨道结构安全服役问题进行了综合论述,提出以高速道岔、无砟轨道、无缝线路三大关键轨道结构为研究对象,围绕环境因素与列车动荷载耦合、重复作用下工程结构与材料动态性能演化、高速铁路轨道结构损伤及累积变形、高速车辆系统与固定轨道结构的动态相互作用演变机制等关键问题,开展其动态性能演变及服役安全理论和工程技术方面的研究,以期为我国高速铁路轨道结构服役安全与高效维护提供基础理论和关键技术支撑。

The key theoretical research on the safe service of track structures is a major foundational work to ensure the efficient operation of China's large-scale high-speed railway networks.This article comprehensively discusses the safety service of high-speed railway track structures in China.Three key track structures of the high-speed turnouts,ballastless tracks,and continuous welded rail are proposed as the research objects,based on the key issues such as coupling of environmental factors and train dynamic load,dynamic evolution of engineering structure and material under repeated action,damage and cumulative deformation of high-speed railway track structure,dynamic interaction evolution mechanism between high-speed vehicle system and fixed track structure,research on its dynamic performance evolution and service safety theory and engineering technology is carried out in order to provide basic theoretical and key technical support for the service safety and efficient maintenance of track structure of high-speed railways in China.