Field investigation of various wide PSC sleepers developed for quick-hardened track the ballasted track

초록

Repeated running of trains can cause wear and crack of ballast gravels, and it may lead to the track irregularity of ballasted track. Wide PSC sleeper whose bottom area is significantly increased compared to general PSC sleepers is a track component that can reduce track irregularity and ballast pressure, and ensure track safety. In this study, three kinds of wide PSC sleepers (MF-L type, MF-S-60 type, and MF-S-150 type) developed for use in the ballasted track and quick hardened track were installed on the test line that is ballasted track, and the track behaviour was compared and analyzed for each wide sleeper on train operation. As a result of the track behaviour analysis on train operation, the ballasted track with MF-L type wide sleepers was the most stable. Although the shape of MF-S type was same, the track with MF-S-150 type wide sleepers (concrete compressive strength