Evaluation of a track transition design for soft subgrade bridge approaches

摘要

Track transitions, areas where the track structure changes, such as at bridges or road crossings, are problem areas for track main-tainers and can become chronic maintenance areas.rnThe dynamic and long-term performance of these transition zones can vary from the surrounding track, resulting in differential settlement that produces track surface and alignment defects. While it is unlikely to eliminate changes in track stiffness, damping or long-term settlement across transitions, it may be possible to provide adequate transitions, smoothly ramping from one track structure to another.