Thameslink set to get noise dampening on rail tracks

SilentTrack was developed by researchers at Southampton University and engineers at Tata Steel, and is already installed at more than 90 miles (140km) of localised ‘noise hot-spots’ in 13 countries around the world.

Due for completion in 2018, Thameslink will provide more frequent and longer new-build trains to three central London stations.

This will mean significantly increased traffic through Blackfriars station with associated noise concerns, as David Benton explained to The Engineer.

‘You don’t just go out and measure one train and say: “ah yes, that train is noisier”. In fact, the train may be even quieter. But if there are more trains the overall noise impact during a particular day or period will be increased… it’s called a time-weighted average.’ 

In all, 0.8 miles (1.3km) of SilentTrack will be required to bring the stations within noise regulations based on the technology delivering up to a 50 per cent reduction in noise.

The system comprises two or three resonant masses of Scunthopre-made steel embedded in elastomer with a high damping factor. The dampers are attached to either side of the rail with spring clips.