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Numerical Analyses of Earthquake Induced Liquefaction and Deformation Behaviour of an Upstream Tailings Dam
Quaid E Awam Univ Engn Sci & Technol, Dept Civil Engn, Nawabshah, Sindh, Pakistan..
Lulea Univ Technol, Dept Civil Environm & Nat Resources Engn, S-97187 Lulea, Sweden..
Lulea Univ Technol, Dept Civil Environm & Nat Resources Engn, S-97187 Lulea, Sweden..
Kyoto Univ, Dept Urban Management, Kyoto, Japan..
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2017 (English)In: Advances in Materials Science and Engineering, ISSN 1687-8434, E-ISSN 1687-8442, 5389308Article in journal (Refereed) Published
Abstract [en]

Much of the seismic activity of northern Sweden consists of micro-earthquakes occurring near postglacial faults. However, larger magnitude earthquakes do occur in Sweden, and earthquake statistics indicate that a magnitude 5 event is likely to occur once every century. This paper presents dynamic analyses of the effects of larger earthquakes on an upstream tailings dam at the Aitik copper mine in northern Sweden. The analyses were performed to evaluate the potential for liquefaction and to assess stability of the dam under two specific earthquakes: a commonly occurring magnitude 3.6 event and a more extreme earthquake of magnitude 5.8. The dynamic analyses were carried out with the finite element program PLAXIS using a recently implemented constitutive model called UBCSAND. The results indicate that the magnitude 5.8 earthquake would likely induce liquefaction in a limited zone located below the ground surface near the embankment dikes. It is interpreted that stability of the dam may not be affected due to the limited extent of the liquefied zone. Both types of earthquakes are predicted to induce tolerable magnitudes of displacements. The results of the postseismic slope stability analysis, performed for a state after a seismic event, suggest that the dam is stable during both the earthquakes.

Place, publisher, year, edition, pages
Hindawi Publishing Corporation, 2017. 5389308
National Category
Materials Engineering Geophysics
Identifiers
URN: urn:nbn:se:uu:diva-319307DOI: 10.1155/2017/5389308ISI: 000395137300001OAI: oai:DiVA.org:uu-319307DiVA: diva2:1087911
Available from: 2017-04-10 Created: 2017-04-10 Last updated: 2017-04-10Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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