Creep Behavior of Ice-Rich Warm Peaty Soils along the Trans Alaska Pipeline System at Lost Creek, Alaska

dc.affiliation.institutionUniversity of Alaska Fairbanks
dc.affiliation.institutionUniversity of Alaska Fairbanks
dc.contributor.authorBray, Matthew T.
dc.contributor.authorDarrow, Margaret
dc.date.accepted2024-11-22
dc.date.accessioned2025-02-03T19:00:30Z
dc.date.available2025-02-03T19:00:30Z
dc.date.issued2024-11-22
dc.date.revised2024-11-17
dc.date.submitted2024-04-13
dc.description.abstractIn 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.disclaimerThe 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.doi10.1139/cgj-2024-0200
dc.identifier.issn0008-3674
dc.identifier.urihttps://hdl.handle.net/1807/141995
dc.publication.journalCanadian Geotechnical Journal
dc.publisherCanadian Science Publishing
dc.titleCreep Behavior of Ice-Rich Warm Peaty Soils along the Trans Alaska Pipeline System at Lost Creek, Alaska
dc.typeResearch Article
dc.typeArticle Post-Print

Files

Original bundle

Now showing 1 - 2 of 2
Loading...
Thumbnail Image
Name:
cgj-2024-0200.pdf
Size:
5.94 MB
Format:
Adobe Portable Document Format
No Thumbnail Available
Name:
Supplemental Material_Lost Creek_CGJ_Final Draft_R1.docx
Size:
2.72 MB
Format:
Microsoft Word

License bundle

Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.68 KB
Format:
Plain Text
Description:

Collections