Abstract
The track support stiffness measurement and evaluation system for slab tracks proposed in this study enables the calculation of the load–displacement diagram at the various measurement positions. Therefore, it is possible to evaluate the track support stiffness directly on-site without evaluating the spring stiffness of the elastic material through sampling or in situ testing, also enabling the evaluation of the deterioration of the elastic material. In addition, the performance evaluation data for elastic materials obtained through field tests using measurement equipment and software to track support stiffness are integrated and managed on the administrator′s computer. Therefore, the replacement plan is established, and the maintenance history is managed by identifying the replacement time and location of elastic materials. It is possible to evaluate the performance and condition of the elastic material at various points during track inspection and the track support stiffness and durability of the elastic material (spring stiffness variation rate, replacement periods, among others) at the current operating condition.
Highlights
IntroductionThe construction market size for railways is gradually shrinking, while the market size for operating maintenance (damage assessment, diagnosis, repair and reinforcement) for purposes such as cities and general railways is expanding
The construction market size for railways is gradually shrinking, while the market size for operating maintenance for purposes such as cities and general railways is expanding
The relative error range of static and dynamic spring stiffness obtained by the track support stiffness (TSS) tester through wireless communication is analyzed to be less than 3% of the average value of the measuring result, which proved the adequacy of the control performance aspect of the TSS tester
Summary
The construction market size for railways is gradually shrinking, while the market size for operating maintenance (damage assessment, diagnosis, repair and reinforcement) for purposes such as cities and general railways is expanding. Using conventional field measurements, the track-support stiffness can be calculated by measuring the dynamic wheel load and displacement of the rail or sleeper. Based on this calculation, the spring stiffness of the resilience pad installed on the lower rail or sleeper can be determined [2,3,4,5,15]. This is performed so that the reason for the replacement of elastic materials (necessity of replacement) and the performance improvement effect before and after replacement can be immediately demonstrated based on the experimental data
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