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Applying available internal erosion criteria to dams with cores of glacial till - a reassessment of a 1980s sinkhole
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
2012 (English)In: Dams: Engineering in a Social and Environmental Context: Institution of Civil Engineers / [ed] Andrew Pepper, London: Research Publishing Services, 2012, p. 131-144Conference paper, Published paper (Refereed)
Abstract [en]

Most available criteria for assessing susceptibility to internal erosion and internal instability are laboratory or empirically based on narrowly graded materials. Glacial till, which is a typical material used for impervious cores in Swedish dams as well as in dams in Canada and other areas once glaciated, is generally broadly graded, a characteristic that primarily stems from its glacial origin and mode of formation. Assessing internal erosion in glacial till core dams may be difficult, and their track record shows a greater susceptibility to internal erosion and sinkhole development than that of other types of dams. This paper will, on the one hand, discuss ways of assessing dams composed of glacial till, and on the other hand it will cover the reassessment of a 1980s sinkhole incident in a Swedish dam, where a sinkhole was believed, at the time, to be caused by internal erosion. A step-by-step assessment is conducted by applying current available and suitable methods to help determine whether the incident was internal erosion dependent.

Place, publisher, year, edition, pages
London: Research Publishing Services, 2012. p. 131-144
Keywords [en]
Civil engineering and architecture - Geoengineering and mining engineering
Keywords [sv]
Dams, internal erosion, filter, core, Samhällsbyggnadsteknik och arkitektur - Geoteknik och gruvteknik
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-32162DOI: 10.1680/dams.57999Scopus ID: 84907388853Local ID: 68f3643d-2bd7-4149-84ac-c970c21cf680ISBN: 978-0-7277-5799-9 (print)ISBN: 978-0-7277-5800-2 (electronic)OAI: oai:DiVA.org:ltu-32162DiVA, id: diva2:1005396
Conference
British dam society : Biennial conference 12/09/2012 - 15/09/2012
Note
Godkänd; 2012; 20140401 (hayrof)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

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Publisher's full textScopushttp://www.icevirtuallibrary.com/content/chapter/DAMS2012.57999.s0012

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Rönnqvist, Hans

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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Language
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  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
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  • asciidoc
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