朔黄铁路区间数字化捣固技术及效果分析

Section Digital Tamping Technology and Effect Analysis of Shuozhou Huanghua Railway

朔黄铁路线路环境复杂,对轨道几何状态提出了更高要求,迫切需要高质量的线路养护维修工作。以朔黄铁路有砟轨道精捣作业为背景,对复杂环境下快速测量、数字化捣固作业、效果评价等环节开展研究,提出适用于重载铁路的轨道平顺性控制方法,分析捣固作业前后轨道平顺性时空分布特征,定量化评价大机精捣作业效果。结果表明,采用GNSS+惯导组合测量方式适用于朔黄铁路不同线路环境的轨道快速精密测量。通过重构捣固区间平纵断面线形,并按组合弦方法控制轨道平顺性,轨道维修质量明显提升,静态TQI整体降幅达到32.62%,动态TQI整体降幅达到17.30%;10、70 m弦长轨向和高低峰值明显下降,数字化精测精捣作业方法对线路高低、轨向控制效果显著,作业后线路平顺性整体提升效果明显。

The Shuozhou-Huanghua Railway has a complex environment,which imposes higher demands on the track geometry and urgently requires high-quality track maintenance and repair work.This paper focuses on the fine tamping of ballasted tracks in Shuozhou-Huanghua Railway as a background for studying rapid measurements,digital tamping operations,and effect evaluation in a complex environment and proposes a track regularity control method suitable for heavy-haul railways,analyzes the spatial and temporal distribution characteristics of track regularity before and after the tamping operations,and quantitatively evaluates the effectiveness of fine tamping operations by large track maintenance machinery.The results show that the GNSS+inertial navigation combined measurement method is suitable for fast and precise track measurement in different line environments of Shuozhou-Huanghua Railway.By reconstructing the longitudinal and vertical alignment of the tamping section and controlling track regularity using the combined chord method,the quality of track maintenance has significantly improved.The overall reduction in static TQI reached 32.62%,while the overall reduction in dynamic TQI reached 17.30%.The peak values of alignment and longitudinal level over 10 m and 70 m chord lengths have significantly decreased.The digital precise measurement and tamping operation method has demonstrated remarkable effectiveness in controlling the longitudinal level and alignment,resulting in a notable overall improvement in track regularity after the operations.