The maintenance and improvement of track smoothness has always been an important aspect of the service status management of high-speed railway lines. In the past, track fine adjustment adopted a static data design plan. However, static data cannot reflect the real situation under train load, resulting in insignificant adjustment effects in some sections. Therefore, a track fine adjustment method based on dynamic inspection data is proposed. Firstly, preliminary correction of mileage errors in dynamic inspection data is conducted based on curve ledger. By sequentially applying the segmented correction method based on the principle of optimal correlation and Dynamic Time Warping (DTW) method with window constraints, the precise mileage of static data is mapped to dynamic inspection data through track gauge irregularity waveform matching, and the dynamic track irregularity of sleeper based on the sleeper mileage is calculated. Secondly, select the irregularity of a certain cutoff wavelength and verify that the data is clear. Design the elevation and plane adjustment plan for the reference track based on the longitudinal level and alignment of each sleeper. Design the non-reference track adjustment plan based on the cross level and gauge of each sleeper. The results of fine adjustment practice indicate that the new ballastless track high-speed railway will adjust the longitudinal level of the two rails according to the dynamic plan. The dynamic average TQI can be improved by about 0.20 mm on the basis of static adjustment. After static fine adjustment, dynamic fine adjustment can further reduce the TQI-T of high-speed turnout from 3.79 mm to 2.95 mm, which has a significant effect on improving the standard deviation of longitudinal level. This method can solve the problem of shaking caused by long wave longitudinal level or alignment irregularity.
本文提出逐枕轨道动态不平顺概念,并基于相关性最优准则与动态时间规整(Dynamic Times Warping, DTW)算法修正动检数据里程误差,提出基于动检数据的轨道精调方法,针对不同工况开展现场验证和效果评估,以期进一步提升现场病害定位效率和轨道精调效果,为我国高铁线路高平顺性的保持及智能运维提供理论基础和技术支撑。
基于道岔区轨道质量指数(Track Quality Index of Turnout,TQI-T)的道岔区动态轨道几何状态评价方法逐步推广运用[19],但岔区各种轨件组成复杂,轨道刚度沿线路纵向分布不均匀[20],造成动、静态TQI的差异相比于区间正线更大。部分道岔在采用静态数据调整后的TQI-T改善效果并未达到预期。为进一步提升岔区轨道几何质量,首先利用轨道测量仪的绝对测量数据,将道岔平面和高程线形调至设计位置,控制岔区轨道长波平顺性。在静态精调后,利用本文方法制定动态调整方案,再次精修岔区轨道中短波平顺性。
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