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Applying empirical methods to assess the internal stability of embankment dam cores of glacial till
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0001-8739-2219
2015 (English)In: Geomaterials, ISSN 2161-7538, E-ISSN 2161-7546, Vol. 5, p. 1-18Article in journal (Refereed) Published
Abstract [en]

This paper presents a database of glacial till gradations that were compiled from laboratory in-ternal stability tests from the literature and from core soils of existing dams, some of which have experienced internal erosion. The potential internal instability of these gradations is assessed using empirical methods. Two approaches of evaluation are used: the Kenney-Lau method, which analyzes the shape of the gradation curve; and the Burenkova method, which uses factors of uniformity of the slope of the gradation. Although they include some uncertainties in terms of soils with fines, these methods, which were primarily developed from laboratory studies of sand and gravels, are used in engineering practice to evaluate widely graded soils that include fines, such as glacial tills. This study evaluates the glacial till gradations of the database using these approaches and discusses their applicability and relative predictive success. This study indicates that both the Kenney-Lau method and the Burenkova method have merit, but a closer analysis indicates that the Kenney-Lau approach has better predictive ability in terms of glacial tills.

Place, publisher, year, edition, pages
2015. Vol. 5, p. 1-18
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-3681DOI: 10.4236/gm.2015.51001Local ID: 18024e50-578c-4f98-80c5-07386d392c86OAI: oai:DiVA.org:ltu-3681DiVA, id: diva2:976540
Note

Godkänd; 2014; 20141028 (hayrof)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-06-26Bibliographically approved

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Rönnqvist, HansViklander, Peter

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