Creep Behavior of Ice-Rich Warm Peaty Soils along the Trans Alaska Pipeline System at Lost Creek, Alaska
dc.affiliation.institution | University of Alaska Fairbanks | |
dc.affiliation.institution | University of Alaska Fairbanks | |
dc.contributor.author | Bray, Matthew T. | |
dc.contributor.author | Darrow, Margaret | |
dc.date.accepted | 2024-11-22 | |
dc.date.accessioned | 2025-02-03T19:00:30Z | |
dc.date.available | 2025-02-03T19:00:30Z | |
dc.date.issued | 2024-11-22 | |
dc.date.revised | 2024-11-17 | |
dc.date.submitted | 2024-04-13 | |
dc.description.abstract | In Interior Alaska, a slope underlying the Trans Alaska Pipeline System has recently experienced downslope movement, which is attributed to a buried frozen, ice-rich peat layer. We performed a field investigation of the site including coring and sampling, and conducted a suite of laboratory tests including mechanical tests at temperatures between -0.56°C and -5°C to quantify the secondary creep behavior and to estimate the impact of soil cooling on the creep deformation. We tested a variety of soils, including ice-rich silt, silty peat, and peat with the majority having an organic content of 10% or greater. The results indicated that temperature has a strong control on the resulting time-dependent mechanical properties. Here we provide secondary creep power law relationships for these soils. The analysis indicates that cooling the soils can be effective in reducing creep movement; for example, cooling by 1.1°C from -0.56°C to -1.67°C results in an order of magnitude reduction in the shear deformation rates. These results are significant as they add to the limited amount of work done on the time-dependent mechanical behavior of ice-rich peat and organic soils at warm sub-freezing temperatures. | |
dc.description.disclaimer | The presentation of the authors' names and (or) special characters in the title of the pdf file of the accepted manuscript may differ slightly from what is displayed on the item page. The information in the pdf file of the accepted manuscript reflects the original submission by the author. | |
dc.identifier.doi | 10.1139/cgj-2024-0200 | |
dc.identifier.issn | 0008-3674 | |
dc.identifier.uri | https://hdl.handle.net/1807/141995 | |
dc.publication.journal | Canadian Geotechnical Journal | |
dc.publisher | Canadian Science Publishing | |
dc.title | Creep Behavior of Ice-Rich Warm Peaty Soils along the Trans Alaska Pipeline System at Lost Creek, Alaska | |
dc.type | Research Article | |
dc.type | Article Post-Print |
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