有砟高铁清筛轨道质量分级控制指标研究  

Research on Grading Evaluation of Track Quality for Cleaning of Ballasted High-Speed Railway

作　　者：王有能 Wang Youneng(China Railway Shanghai Group Co.,Ltd,Shanghai 200071,China)

机构地区：[1]中国铁路上海局集团有限公司,上海200071

出　　处：《华东交通大学学报》2024年第6期35-42,共8页Journal of East China Jiaotong University

基　　金：中国铁路上海局集团有限公司科研课题(2022230)。

摘　　要：【目的】为了提高有砟高铁道床周期维修的效果,以及规范有砟高铁道床清筛的施工流程。【方法】基于沪蓉线合宁段2019年1月—2023年5月动态检测数据,绘制轨道质量指数(TQI)的时域曲线和TQI变化率散点图。【结果】研究发现轨道进入“损耗期”时距离上一次周期维修的最短时间为12个月;TQI变化率大于2.0%时对应的TQI值为TQI≥4.0 mm。基于沪蓉线合宁段2022年10月—11月清筛施工过程中,道床在各工序作业前、后测量的TQI数据,整理得到各工序后轨道TQI下降的平均值,结合施工作业验收要求和有砟高铁线路清筛前的TQI值,提出有砟高铁道床清筛的轨道质量分级控制指标。轨道质量指数(TQI)时域曲线呈现“浴盆曲线”特征,应在轨道处于“损耗期”前进行道床周期性维修作业;有砟高铁道床周期维修的TQI指标:TQI≥4.0 mm,有砟高铁道床周期维修宜以12个月为周期;提出有砟高铁道床清筛的作业分级管控指标,施工后静态轨道质量需满足:清筛并三捣两稳后TQI≤5.0 mm,五捣三稳后TQI≤4.5 mm,七捣四稳后TQI≤4.0 mm,1次精捣后TQI≤3.0 mm,2次精捣后TQI≤2.5 mm。【结论】轨道质量分级控制的研究为有砟高铁道床养护维修的管理和施工提供了参考。【Objective】In order to improve the effect of periodic maintenance for ballasted high-speed railway,and standardize the construction process for bed cleaning of ballasted high-speed railway.【Method】Time-domain curves of Track Quality Index(TQI)and scatter plots of TQI were drawn Based on the dynamic monitoring data from January 2019 to May 2023 for Shanghai-Chengdu line Hefei-Nanjing section.【Result】The short-est time from the last cycle of maintenance when the track enters the“wear and tear period”was 12 months,when the TQI change rate is greater than 2%,the correspording TQI value was TQI≥4.0 mm.Based on the TQI data measured before and after each process during cleaning construction in Shanghai-Chengdu line Hefei-Nanjing section from October to November 2022,the average decrease of TQI by each process was calculated.Grad-ing evaluation of track quality for ballasted high-speed railway was proposed,combining the acceptance require-ments or construction and TQI value of track before bed cleaning.TQI time-frequency curve exhibits a“bathtub curve”characteristic.Maintenance of the bed should be carried out before the“aging phase”.The TQI criterion for the periodic maintenance of ballasted high-speed railway was proposed:TQI≥4.0 mm,and periodic mainte-nance for ballasted high-speed railway track was recommended to be a 12 months cycle.A grading and control evaluation for ballasted high-speed railway bed cleaning operations was proposed,and the static track quality should meet the following criteria after construction:TQI≤5.0 mm after cleaning and three times tamping and two times stabilizing(3D2W),TQI≤4.5 mm after 5D3W,TQI≤4.0 mm after 7D4W,TQI≤3.0 mm after precise tamping 1,and TQI≤2.5 mm after precise tamping 2.【Conclusion】A reference is provided for the management and construction of ballasted high-speed railway bed cleaning.

关 键 词：有砟高铁 轨道质量指数 道床清筛 道床捣固 修理周期 

分 类 号：U238[交通运输工程—道路与铁道工程] TB535[理学—物理]