铁道建筑

基于国内某典型重载铁路2021—2023年周期性轨道几何检测数据，结合线路通过总质量、捣固清筛等运维信息，研究重载铁路轨道质量典型劣化规律，对比分析重载铁路轨道几何劣化速率在路基直线、路基曲线、桥梁、隧道等不同线路基础类型下的分布特征，为重载铁路轨道管理、养修计划制订等提供依据。结果表明：轨道质量在捣固周期内的劣化趋势可归为平稳发展和自然劣化两种典型模式，其占比分别约为15%和85%；在所有线路基础类型中，路基直线区段劣化速率最小，桥梁区段劣化速率最大；高低单项在轨道质量劣化中贡献最大，其标准差劣化速率平均值约为轨向、轨距的2～4倍。

Based on the periodic track geometry detection data of a typical heavy haul railway in China from 2021 to 2023, combined with operation and maintenance information such as total passing weight, compaction and screening of the line, this study investigated the typical degradation law of heavy haul railway track quality, compared and analyzed the distribution characteristics of the geometric degradation rate of heavy haul railway track under different types of line foundations such as subgrade straight lines, subgrade curves, bridges, tunnels, etc., providing a basis for heavy haul railway track management and maintenance plan formulation. The results show that the degradation trend of track quality during the compaction cycle can be classified into two typical modes, which are steady development and natural degradation, accounting for about 15% and 85% respectively. Among all types of line foundations, the degradation rate of the subgrade straight section is the lowest, and the degradation rate of the bridge section is the highest. High and low single items contribute the most to the degradation of track quality, and an average standard deviation degradation rate of them is about 2～4 times that of track orientation and track gauge.