Determination of a vertical ballast profile specification which will allow the reclipping of sleepers without 'barring' (IM-TD-056)

Following traditional relaying/ballast reprofiling operations, the vertical ballast profile is normally such that it is necessary to lift sleepers by bar, up to the underside of the rail surface, in order to allow reclipping. Modern ballast profiling techniques are able to produce a much smoother ballast profile. Using these it...