EXPERIMENTAL STUDY OF LADDER TRACK ON A RAIL TRANSIT ELEVATED BRIDGE

Ladder track is a new type of vibration-reduction track system that has been applied to several urban railways in China. A series of experiments were carried out on the ladder track installed on the trial section of an elevated bridge on the Beijing Metro Line 5. The vibration transmission behaviours of the track were tested in the lab. The track irregularities were measured and the dynamic responses were measured of rails, sleepers and bridge deck when the train running on the ladder track and the common non-ballasted slab track. The data were analyzed in the time domain and the frequency domain. The experimental results show that: compared with common non-ballasted track, the ladder track has good vibration reduction characteristics.