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The role of clay content on the response of railway track foundations during free-to-drain cyclic changes in principal stress rotation

The role of clay content on the response of railway track foundations during free-to-drain cyclic changes in principal stress rotation
The role of clay content on the response of railway track foundations during free-to-drain cyclic changes in principal stress rotation
This paper investigates the role of clay content on the response of railway track foundation materials during free-to-drain cyclic changes in principal stress rotation. Four sand clay mixes typical of an in situ railway track foundation were investigated, with clay contents varying from 7% to 24%. It was found that increasing the clay content from 7% to 24%, reduced the volumetric contraction of the mixes during cyclic shear stress increases below a cyclic shear threshold. Volumetric strain reduced with both increasing intergranular and global void ratios. Non linear regression analysis showed generally high correlations between volumetric strain and both intergranular and global void ratios, with the relationship between volumetric strain and intergranular void ratio showing less scatter.
hollow cylinder apparatus, cyclic tests, principal stress rotation, free to drain, silt / sand / clay, cyclic pore water pressures, cyclic volume change
2214-3912
1-6
Mamou, Anna
1b427024-f9e6-4c79-862c-60fe6fba3a34
Clayton, Christopher
8397d691-b35b-4d3f-a6d8-40678f233869
Powrie, William
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
Priest, Jeff
24ee51e8-5723-4fe9-a22e-9edbf70ed66b
Mamou, Anna
1b427024-f9e6-4c79-862c-60fe6fba3a34
Clayton, Christopher
8397d691-b35b-4d3f-a6d8-40678f233869
Powrie, William
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
Priest, Jeff
24ee51e8-5723-4fe9-a22e-9edbf70ed66b

Mamou, Anna, Clayton, Christopher, Powrie, William and Priest, Jeff (2019) The role of clay content on the response of railway track foundations during free-to-drain cyclic changes in principal stress rotation. Transportation Geotechnics, 20, 1-6, [100246]. (doi:10.1016/j.trgeo.2019.100246).

Record type: Article

Abstract

This paper investigates the role of clay content on the response of railway track foundation materials during free-to-drain cyclic changes in principal stress rotation. Four sand clay mixes typical of an in situ railway track foundation were investigated, with clay contents varying from 7% to 24%. It was found that increasing the clay content from 7% to 24%, reduced the volumetric contraction of the mixes during cyclic shear stress increases below a cyclic shear threshold. Volumetric strain reduced with both increasing intergranular and global void ratios. Non linear regression analysis showed generally high correlations between volumetric strain and both intergranular and global void ratios, with the relationship between volumetric strain and intergranular void ratio showing less scatter.

Text
Mamou et al. TRGEO_2019_64_Accepted - Accepted Manuscript
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More information

Accepted/In Press date: 28 May 2019
e-pub ahead of print date: 13 June 2019
Published date: September 2019
Keywords: hollow cylinder apparatus, cyclic tests, principal stress rotation, free to drain, silt / sand / clay, cyclic pore water pressures, cyclic volume change

Identifiers

Local EPrints ID: 431547
URI: http://eprints.soton.ac.uk/id/eprint/431547
ISSN: 2214-3912
PURE UUID: d42774b4-450a-4675-9531-2040eda13a33
ORCID for Christopher Clayton: ORCID iD orcid.org/0000-0003-0071-8437
ORCID for William Powrie: ORCID iD orcid.org/0000-0002-2271-0826

Catalogue record

Date deposited: 07 Jun 2019 16:30
Last modified: 07 Oct 2020 05:59

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