Measurement of cyclic response of railway embankments and underlying soft peat foundations to heavy axle loads
This paper presents the deformation and pore-water pressure response within peat foundations below three different railway embankments in response to cyclic heavy axle loading. The study sites include two at Canadian National (CN) Railway's Edson and Lac-La-Biche subdivisions in northern Albert...
Published in: | Canadian Geotechnical Journal |
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crcansciencepubl:10.1139/cgj-2012-0118 2024-09-15T18:17:19+00:00 Measurement of cyclic response of railway embankments and underlying soft peat foundations to heavy axle loads Hendry, Michael T. Martin, C. Derek Barbour, S. Lee 2013 http://dx.doi.org/10.1139/cgj-2012-0118 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cgj-2012-0118 http://www.nrcresearchpress.com/doi/pdf/10.1139/cgj-2012-0118 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Geotechnical Journal volume 50, issue 5, page 467-480 ISSN 0008-3674 1208-6010 journal-article 2013 crcansciencepubl https://doi.org/10.1139/cgj-2012-0118 2024-09-05T04:11:15Z This paper presents the deformation and pore-water pressure response within peat foundations below three different railway embankments in response to cyclic heavy axle loading. The study sites include two at Canadian National (CN) Railway's Edson and Lac-La-Biche subdivisions in northern Alberta, and one at CN′s Lévis subdivision in southeastern Quebec. The three sites were instrumented to monitor the spatial distribution of strain, pore pressure generation, and stress, and the distribution of horizontal cyclic displacement with depth during the passage of trains. The horizontal cyclic displacement with depth was measured using a ShapeAccelArray (SAA). An analysis was conducted to determine how close the peat is to yielding under heavy axle loads. This analysis was based on the elastic response determined from undrained triaxial testing, a constitutive model developed for peat, and finite element modelling. The field response and the numerical modelling suggest that the embankments at the northern Alberta sites are stable under current loading conditions. The highest potential for yielding at these sites occurs just beneath the embankment and at the interface between the peat and underlying stiffer soil. At the Lévis site the analysis suggests that a recently constructed ditch concentrates shear stress at a location where the principal stress orientation corresponds to a reduced strength of peat and may have increased the potential for yielding. Article in Journal/Newspaper Lac la Biche Canadian Science Publishing Canadian Geotechnical Journal 50 5 467 480 |
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Canadian Science Publishing |
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English |
description |
This paper presents the deformation and pore-water pressure response within peat foundations below three different railway embankments in response to cyclic heavy axle loading. The study sites include two at Canadian National (CN) Railway's Edson and Lac-La-Biche subdivisions in northern Alberta, and one at CN′s Lévis subdivision in southeastern Quebec. The three sites were instrumented to monitor the spatial distribution of strain, pore pressure generation, and stress, and the distribution of horizontal cyclic displacement with depth during the passage of trains. The horizontal cyclic displacement with depth was measured using a ShapeAccelArray (SAA). An analysis was conducted to determine how close the peat is to yielding under heavy axle loads. This analysis was based on the elastic response determined from undrained triaxial testing, a constitutive model developed for peat, and finite element modelling. The field response and the numerical modelling suggest that the embankments at the northern Alberta sites are stable under current loading conditions. The highest potential for yielding at these sites occurs just beneath the embankment and at the interface between the peat and underlying stiffer soil. At the Lévis site the analysis suggests that a recently constructed ditch concentrates shear stress at a location where the principal stress orientation corresponds to a reduced strength of peat and may have increased the potential for yielding. |
format |
Article in Journal/Newspaper |
author |
Hendry, Michael T. Martin, C. Derek Barbour, S. Lee |
spellingShingle |
Hendry, Michael T. Martin, C. Derek Barbour, S. Lee Measurement of cyclic response of railway embankments and underlying soft peat foundations to heavy axle loads |
author_facet |
Hendry, Michael T. Martin, C. Derek Barbour, S. Lee |
author_sort |
Hendry, Michael T. |
title |
Measurement of cyclic response of railway embankments and underlying soft peat foundations to heavy axle loads |
title_short |
Measurement of cyclic response of railway embankments and underlying soft peat foundations to heavy axle loads |
title_full |
Measurement of cyclic response of railway embankments and underlying soft peat foundations to heavy axle loads |
title_fullStr |
Measurement of cyclic response of railway embankments and underlying soft peat foundations to heavy axle loads |
title_full_unstemmed |
Measurement of cyclic response of railway embankments and underlying soft peat foundations to heavy axle loads |
title_sort |
measurement of cyclic response of railway embankments and underlying soft peat foundations to heavy axle loads |
publisher |
Canadian Science Publishing |
publishDate |
2013 |
url |
http://dx.doi.org/10.1139/cgj-2012-0118 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cgj-2012-0118 http://www.nrcresearchpress.com/doi/pdf/10.1139/cgj-2012-0118 |
genre |
Lac la Biche |
genre_facet |
Lac la Biche |
op_source |
Canadian Geotechnical Journal volume 50, issue 5, page 467-480 ISSN 0008-3674 1208-6010 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cgj-2012-0118 |
container_title |
Canadian Geotechnical Journal |
container_volume |
50 |
container_issue |
5 |
container_start_page |
467 |
op_container_end_page |
480 |
_version_ |
1810455337268936704 |