A Study on the Reduction Methods of the Track Irregularity in High Speed Railway

Abstract

The reduction strategies of the track irregularity in the bridge expansion joint zone are an important issue in the ballasted track on the high speed railway bridge. In general, the track irregularity on the railway bridge occurs at the expansion joint zone and is more spread across the bridge. This is due to the dynamic behavior from the train-induced dynamic impact and thermal expansion of the bridge. In this paper, field testing of the several methods for reducing the track irregularity on the bridge expansion joint zone such as the zero longitudinal restraint(ZLR), tied sleeper and ballast stabilizer is conducted. And then the progress of the track irregularity and the frequency of the maintenance work before and after the filed test construction are investigated.