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Determination of dynamic track modulus from measurement of track velocity during train passage

Record type: Article

The measurement of track stiffness, or track modulus, is an important parameter for assessing the condition of a railway track. This paper describes a method by which the dynamic track modulus can be determined from the dynamic displacements of the track during normal train service, measured using geophones. Two techniques are described for calculating the track modulus—the inferred displacement basin test (DBT) method and a modified beam on an elastic foundation (BOEF) method. Results indicate that the viscoelastic response of the soil will influence the value of track modulus determined using the DBT method. The BOEF method was therefore used to calculate the apparent increase in axle load due to train speed. Hanging or partly supported sleepers were associated with a relatively small increase in dynamic axle loads with train speed.

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Citation

Priest, J. A. and Powrie, W. (2009) Determination of dynamic track modulus from measurement of track velocity during train passage Journal of Geotechnical and Geoenvironmental Engineering, 135, (11), pp. 1732-1740. (doi:10.1061/(ASCE)GT.1943-5606.0000130).

More information

Published date: November 2009
Keywords: railroad tracks, stiffness, velocity, dynamic loads, measurement

Identifiers

Local EPrints ID: 75864
URI: http://eprints.soton.ac.uk/id/eprint/75864
ISSN: 1090-0241
PURE UUID: 60077314-c624-4f4b-aa2e-740f3b02c0f1
ORCID for W. Powrie: ORCID iD orcid.org/0000-0002-2271-0826

Catalogue record

Date deposited: 12 Mar 2010
Last modified: 18 Jul 2017 23:42

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