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Behaviour of saturated railway track foundation materials during undrained cyclic loading

Behaviour of saturated railway track foundation materials during undrained cyclic loading
Behaviour of saturated railway track foundation materials during undrained cyclic loading
This paper presents the results of a series of hollow cylinder tests carried out to investigate the undrained behaviour of saturated railway track foundation materials during cyclic loading involving principal stress rotation. Four sand-clay mixes representative of real railway track foundation materials were investigated. It was found that moderate additions of clay (up to ~14% by weight) increased the cyclic shear stress threshold at which significant excess pore pressures started to accumulate. After the cyclic shear stress threshold had been exceeded, the rate of pore pressure increase with the logarithm of the axial strain was greatest for the material having a clay content of 11%. Excess pore pressure generation reduced with increasing intergranular and global void ratio, with the global void ratio being perhaps the more useful indicator because of the reduced amount of scatter and higher correlation of the idealized relationship.
0008-3674
Mamou, Anna
12e16572-0c09-42b8-a249-1f6f12b99392
Priest, Jeffery
c90bd680-0009-4661-8919-71e15c3cf0b5
Clayton, Christopher
8397d691-b35b-4d3f-a6d8-40678f233869
Powrie, William
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
Mamou, Anna
12e16572-0c09-42b8-a249-1f6f12b99392
Priest, Jeffery
c90bd680-0009-4661-8919-71e15c3cf0b5
Clayton, Christopher
8397d691-b35b-4d3f-a6d8-40678f233869
Powrie, William
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c

Mamou, Anna, Priest, Jeffery, Clayton, Christopher and Powrie, William (2017) Behaviour of saturated railway track foundation materials during undrained cyclic loading. Canadian Geotechnical Journal. (doi:10.1139/cgj-2017-0196).

Record type: Article

Abstract

This paper presents the results of a series of hollow cylinder tests carried out to investigate the undrained behaviour of saturated railway track foundation materials during cyclic loading involving principal stress rotation. Four sand-clay mixes representative of real railway track foundation materials were investigated. It was found that moderate additions of clay (up to ~14% by weight) increased the cyclic shear stress threshold at which significant excess pore pressures started to accumulate. After the cyclic shear stress threshold had been exceeded, the rate of pore pressure increase with the logarithm of the axial strain was greatest for the material having a clay content of 11%. Excess pore pressure generation reduced with increasing intergranular and global void ratio, with the global void ratio being perhaps the more useful indicator because of the reduced amount of scatter and higher correlation of the idealized relationship.

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wp-am-Behaviour of saturated railway track foundation materials during cyclic loading - Accepted Manuscript
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Accepted/In Press date: 15 September 2017
e-pub ahead of print date: 15 September 2017

Identifiers

Local EPrints ID: 414341
URI: http://eprints.soton.ac.uk/id/eprint/414341
ISSN: 0008-3674
PURE UUID: b2c40ac2-85c3-4e14-aa29-6ebfda3dda98
ORCID for Christopher Clayton: ORCID iD orcid.org/0000-0003-0071-8437
ORCID for William Powrie: ORCID iD orcid.org/0000-0002-2271-0826

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Date deposited: 26 Sep 2017 16:30
Last modified: 07 Oct 2020 01:44

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Author: Anna Mamou
Author: Jeffery Priest
Author: William Powrie ORCID iD

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