Títol:
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Coupled analysis of a backfill hydration test
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Autor/a:
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Alonso Pérez de Agreda, Eduardo; Lloret Morancho, Antonio; Delahaye, Carlos Héctor; Vaunat, Jean; Gens Solé, Antonio; Volckaert, G.
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Altres autors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica |
Abstract:
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BACCHUS2 in situ isothermal wetting experiment has been analysed by means of a coupled flow-deformation
approach. Backfill material, a mixture of Boom clay powder and high density pellets, has been
extensively tested in the laboratory in order to determine its hydraulic and mechanical properties. Parameters
of constitutive equations were derived from this experimental data base. Two mechanical constitutive
models have been used in the simulation of the 'in situ' experiment: a state surface approach and an
elastoplastic model. Calculations have shown several features of the hydration process which help to
understand the behaviour of expansive clay barriers. Predictions using both models have been compared
with each other and with actual measurement records. This has allowed a discussion of the comparative
mertis of both approaches and the identiÞcation of some critical parameters of backfill behaviour. Overall
agreement between calculations and field measurements is encouraging and shows the potential of the
methods developed to model the behaviour of engineered clay barriers in the context of nuclear waste
disposal. |
Abstract:
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Peer Reviewed |
Matèries:
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-Swelling soils -Radioactive waste disposal -Soil mechanics -expansive clay -hydromechanics -unsaturated soils -nuclear waste -in situ test -Argiles expansives -Mecànica dels sòls -Residus radioactius -- Emmagatzematge |
Drets:
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Tipus de document:
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Article |
Publicat per:
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Wiley
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Compartir:
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