Measurements were made under traffic of track deflections and of movement in the ground beneath railway track at an embankment which suffered chronically from rapidly deteriorating track geometry and from the need frequently to deposit ballast on the track. The deflections so measured were at least one order of magnitude greater than those which would be common on a railway, and similarly exceeded common standards of vertical line and level by an order of magnitude. These large deflections arose largely from movement in a 1–1.5m deep layer of ash, giving rise to an effective track modulus of the order of 1Mpa. This is very much less than typical values, which are in the range 30–300 Mpa: the lowest value reported to date in the literature is about 8Mpa. In order satisfactorily to treat both fundamental problems it would be necessary to stop movement in the ash, either by removing it completely or by stabilising it with concrete or the like.
Track Deflections and Macroscopic Movement of Railway Embankment
Vehicle System Dynamics ; 24 , sup1 ; 154-163
1995-01-01
Article (Journal)
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