绿色低碳可持续的城市轨道交通发展对“碳达峰、碳中和”目标的实现具有重要意义。本文围绕有砟轨道技术在城轨线路中的应用及其养护维修进行探讨，为城市轨道交通高效、高质量发展提供研究思路。基于对传统铁路有砟道床服役年限的总结，通过线路年通过量计算不同制式城轨线路中的有砟道床服役寿命，并进一步针对地面线及高架线城轨有砟道床开展结构选型研究。在此基础上，对国内外城轨有砟道床养护维修相关新型机械及维修工艺进行了介绍，为有砟轨道在城市轨道交通中的实际工程应用提供借鉴和参考。

Developing green, low-carbon and sustainable urban rail transportation is of great significance to accomplish the goal of "carbon peaking and carbon neutrality". In this paper, the application and maintenance of ballast track technology in urban rail lines are discussed, and research ideas are provided for the high-efficiency and high-quality development of urban rail transportation. On the basis of summarizing the service-life of conventional ballast bed, the service-life of ballast bed in various forms of urban rail lines are estimated through the annual line throughput, and further structural selection researches are carried out for the ballast bed of ground line and elevated line in urban rail transit. On this basis, the novel machinery and maintenance technology for the maintenance and maintenance of ballast bed at home and abroad are introduced to offer reference for the actual engineering application of ballast track in urban rail transit.

重载交通荷载作用下地基累积变形原位模拟系统