STUDY ON DETECTING EARLY SIGNS OF RAIL BUCKLING ACCIDENTS USING HIGH-FREQUENCY TRACK DISPLACEMENT DATA

Abstract

 Preventing track buckling is important for safety and reliability of transportation. For that reason, inspections are carried out to prevent track buckling. If the inspection result is poor, we will implement restressing of continuous welded rail. However, in recent years, track buckling have not been eradicated within JR East's jurisdiction. Therefore, in this study, we focused on alignment as a supplementary in-spection. We analyzed how the precursors of track buckling affect the alignment. As a result of the study, in the process of track buckling, alignment is characterized by increasing with the increase in rail tempera-ture. Additionally, based on the data from the rail axial force sensors installed at the locations analyzed for alignment displacement, we report on the relationship between alignment displacement and rail axial force.