PERFORMANCE EVALUATION BY FIELD MEASUREMENT FOR SPEED-UP OF CONVENTIONAL TRACK IN KOREA

초록

Joong-Ang Line, which is one of the conventional lines in Korea, was constructed over half century ago. A local improvement through the repair of track and modification of alignment has been made so far. Further, the improvement strategy for speed up needs a performance investigation of the conventional lines. In this paper, a dynamic impact factor of the conventional track is evaluated based on the dynamic wheel load measured in the field. Total of four locations in the line are selected to measure the wheel loads of the freight and passenger trains. An approximate equation of track impact factor is derived by means of statistical analysis of measured wheel loads and compared with empirical equations from various countries. It is found that the proposed equation is equal to the equation of continuous welded rail track in Japan but less than the equation of AREMA. Therefore it can be concluded that the conventional track satisfies the criteria for dynamic load caused by existing trains and the moderate level of safety is secured."