寒区无砟轨道服役性能演化与提升技术研究进展

Progress of Research on Service Performance Evolution and Improvement Technology of Ballastless Track in Cold Regions

无砟轨道结构的耐久性、可靠性是保证高速铁路长期安全运营的关键。针对寒区无砟轨道典型环境作用特征、服役性能演化与提升技术等相关问题进行综合论述,分析寒区无砟轨道面临的温度荷载、路基冻胀和冻融循环等典型环境作用特征;总结与服役性能相关的寒区无砟轨道损伤演化和耐久性问题,论述寒区无砟轨道服役行为未来的研究趋势;归纳新建和在役无砟轨道服役性能提升技术,以期为我国寒区无砟轨道服役性能提升提供坚实的理论基础和技术沉淀,推动我国高速铁路高质量、高速度、应用场景多样化发展。

The durability and reliability of ballastless track structure are the key to ensure the long-term operation safety of high speed railways.This paper looks into the characteristics of typical environmental effects,service performance evolution and improvement technology of ballastless track in cold regions,and examines the statistical distribution of typical environmental effects such as temperature load,subgrade frost heave and freezethaw cycle faced by ballastless track in cold regions.This paper summarizes the damage evolution and durability problems of ballastless track in cold regions related to service performance,and looks at the future trend of service behavior research of ballastless track in cold regions.This paper summarizes the service performance improvement technology of new and in-service ballastless tracks,so as to provide a solid theoretical basis and technical preparation for the service performance improvement of ballastless tracks in cold regions in China,and promote the development of high-quality,high-speed and diversified application scenarios of high-speed railways in China.