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dc.contributor.authorAlcoverro Bassols, Jordi
dc.contributor.authorOlivella Pastallé, Sebastià
dc.contributor.authorAlonso Pérez de Agreda, Eduardo
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental
dc.date.accessioned2016-02-23T13:36:00Z
dc.date.issued2014-12
dc.identifier.citationAlcoverro, J., Olivella, S., Alonso, E. Modelling fluid flow in opalinus clay excavation damage zone: a semi-analytical approach. "Geological Society, London, special publications (Print)", Desembre 2014, vol. 415, p. 143-166.
dc.identifier.issn0305-8719
dc.identifier.urihttp://hdl.handle.net/2117/83322
dc.description.abstractThe HG-A in situ test, located at the Mont Terri Underground Rock Laboratory (URL), was analysed as part of the FORGE project. This test investigated the behaviour of the excavation damage zone (EDZ) around a backfilled microtunnel by a series of water- and gas-injection tests. Prior to testing, the backfilled microtunnel was sealed with a hydraulic megapacker system. A key aspect was the investigation of crack opening and closure along the EDZ in response to water and gas injections in the context of radioactive waste disposal. In the model, the intrinsic permeability of the EDZ was assumed to depend on deformation, and additional simplifying assumptions were considered: axisymmetry about the tunnel axis; no gravity; soil slices orthogonal to the tunnel axis move independently and in plane strain; liquid and gas flows along the EDZ parallel to the tunnel axis; and undrained saturated conditions for the Opalinus Clay. As a result, the field equations were reduced to differential equations for liquid and gas pressures defined in a one-dimensional (1D) domain representing the EDZ. The main trends of the pressure evolution observed in the test section were reproduced. A 2D axisymmetric model confirmed the validity of the simplifying assumptions, except for small zones of the EDZ near the megapacker ends.
dc.format.extent24 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
dc.subject.lcshOpalinus Clay
dc.subject.othercrack
dc.subject.otherdamage
dc.subject.otherexcavation
dc.subject.otherfluid flow
dc.subject.othernumerical model
dc.subject.otherradioactive waste
dc.subject.otherwaste disposal
dc.titleModelling fluid flow in opalinus clay excavation damage zone: a semi-analytical approach
dc.typeArticle
dc.subject.lemacSòls argilosos
dc.contributor.groupUniversitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques
dc.identifier.doi10.1144/SP415.7
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://sp.lyellcollection.org/content/415/1/143.abstract
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac16495344
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorAlcoverro, J.; Olivella, S.; Alonso, E.
local.citation.publicationNameGeological Society, London, special publications (Print)
local.citation.volume415
local.citation.startingPage143
local.citation.endingPage166


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