Factors that Cause Rail Broken or Cracked with Standard Rail Defect Code Number UIC 712R

Abstract

The effectiveness of the railway structure system gradually declines over time when it is in use. The portion of the rail that needs to make direct contact with the vehicle's wheels is the rail, which is a component of the rail. Many railway derailment occurrences are therefore linked to defective track, according to the pertinent data records about these accidents. These mishaps could be avoided if the broken point were identified. regularly according to Northeastern Railway data, it was discovered that 122 rails were damaged or cracked over the course of ten years at the Thanon Chira Junction-Nong Khai Station, the majority of which were due to fault codes in accordance with International Railway Association Standard (UIC Code 712R). The results of weighting for prioritizing factors that cause broken or cracked rail using defect code based on the standard of the International Union of Railways (UIC) showed that the first highest broken or cracked rail was code 200 (importance weight of 37.70%). The second highest one was code 135 (importance weight of 23.70%). The third highest one was code 421 (importance weight of 18 %). The fourth highest one was code 1321 (importance weight of 17 %). Code 200 demonstrated transverse break that had unidentified starting point. The break immediately happened particularly in very cold weather caused by the rail being used for a long time that led to fatigued rail. In addition, there were other causes that were from wheel slip, and rail wears leading to low strength to support the weight of the passing trains.