针对目前车辆段上盖开发中减振降噪的迫切需求，归纳车辆段轨道振动噪声的既有控制措施，提出车辆 段车场线钢轨无缝化的必要性，研究无缝化对于轨枕的需求。经检算，车辆段在采用臂展式阻力枕并配合其余加 强措施的情况下，能够满足无缝线路的强度和稳定性要求。进一步地，提出7 号可动心轨辙叉无缝道岔技术，并 结合北京地区实际使用条件进行道岔无缝化检算，得出该道岔及道岔群具备无缝化的条件。在车速为15 km/h 的条件 下，进行对比测试，发现可动心轨辙叉道岔相比于固定型辙叉道岔具有3～5 dB 的减振降噪效果。

To address the urgent need for vibration and noise reduction in the development of upper covers, this paper summarizes existing control measures for tracking vibration and noise in depots, emphasizing the necessity of implementing seamless rails in depot lines. We also examine the requirements for sleepers. Our calculations indicate that depots can meet the strength and stability requirements for seamless lines by using arm span resistance pillows in conjunction with other strengthening measures. Additionally, this paper introduces a seamless turnout technology for No.7 movable turnouts and verifies their seamless integration based on actual usage conditions in Beijing. The findings suggest that both the turnouts and the turnout groups are suitable for seamless application. A comparative test conducted at a speed of 15 km/h reveals that the movable turnout reduces vibration and noise by 3–5 dB compared to fixed turnouts.

U231

中国城市轨道交通协会科研专项(CAMET-KY-2022092)