Contribution of base, crib and shoulder ballast to the lateral sliding resistance of railway track: a geotechnical perspective
Contribution of base, crib and shoulder ballast to the lateral sliding resistance of railway track: a geotechnical perspective
The sleeper to ballast interface plays a crucial role in the stability of ballasted railway track, transferring both vertical and lateral loads safely from the superstructure to the sub-base. However, current conceptual models for the behaviour of the interface are incomplete and too simplistic to assess the response of the track system to the loads exerted by modern trains. For example, the increased curving speeds associated with tilting trains introduce potentially significant combinations of vertical, horizontal and moment loading which are not explicitly considered in current assessment procedures. Also, the relative contributions of the base, crib and shoulder ballast to lateral sliding resistance are at present poorly quantified. The behaviour of the sleeper to ballast interface was investigated in a series of tests in an apparatus capable of applying combinations of load representative of real trains. This article presents test data quantifying the relative contributions to total sliding resistance of the base, crib and shoulder. New calculations are presented, which enable the resistance from the crib and various sizes of shoulder ballast to be quantified. The results of the experiments and calculations are compared with each other wnd with the literature, and reasonably consistent patterns of behaviour are identified
lateral ballast resistance, lateral resistance, ballast geometry, track stability, sleeper to ballast interface, track substructure to superstructure interface, G44 type sleeper, high speed, tilting trains, sleeper, lateral, stability, railtrack, rail, ties, shoulder, crib, ballast, base, railroad, experiment, geophones
113-128
Le Pen, L.M.
4a38e256-d113-4bba-b0d4-32d41995928a
Powrie, W.
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
1 March 2011
Le Pen, L.M.
4a38e256-d113-4bba-b0d4-32d41995928a
Powrie, W.
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
Le Pen, L.M. and Powrie, W.
(2011)
Contribution of base, crib and shoulder ballast to the lateral sliding resistance of railway track: a geotechnical perspective.
[in special issue: Rail Research UK: The Universities' Centre for Rail Systems Research]
Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 225 (2), .
(doi:10.1177/0954409710397094).
Abstract
The sleeper to ballast interface plays a crucial role in the stability of ballasted railway track, transferring both vertical and lateral loads safely from the superstructure to the sub-base. However, current conceptual models for the behaviour of the interface are incomplete and too simplistic to assess the response of the track system to the loads exerted by modern trains. For example, the increased curving speeds associated with tilting trains introduce potentially significant combinations of vertical, horizontal and moment loading which are not explicitly considered in current assessment procedures. Also, the relative contributions of the base, crib and shoulder ballast to lateral sliding resistance are at present poorly quantified. The behaviour of the sleeper to ballast interface was investigated in a series of tests in an apparatus capable of applying combinations of load representative of real trains. This article presents test data quantifying the relative contributions to total sliding resistance of the base, crib and shoulder. New calculations are presented, which enable the resistance from the crib and various sizes of shoulder ballast to be quantified. The results of the experiments and calculations are compared with each other wnd with the literature, and reasonably consistent patterns of behaviour are identified
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Published date: 1 March 2011
Keywords:
lateral ballast resistance, lateral resistance, ballast geometry, track stability, sleeper to ballast interface, track substructure to superstructure interface, G44 type sleeper, high speed, tilting trains, sleeper, lateral, stability, railtrack, rail, ties, shoulder, crib, ballast, base, railroad, experiment, geophones
Organisations:
Civil Engineering & the Environment, Civil Maritime & Env. Eng & Sci Unit
Identifiers
Local EPrints ID: 185725
URI: http://eprints.soton.ac.uk/id/eprint/185725
ISSN: 0954-4097
PURE UUID: 328ce37a-ba8f-4fb8-a94d-e22b8e440165
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Date deposited: 11 May 2011 07:36
Last modified: 15 Mar 2024 03:24
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