Modeling swelling soils for disposal barriers
A fully coupled advanced formulation for heat, liquid and gas transfer in unsaturated deforming soils is presented. Balance equations are rooted in the theory of mixtures. A double porosity model, which is believed to be especially relevant when simulating expansive soils, is proposed to characteriz...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2000 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/2207 |
| Acceso en línea: | https://hdl.handle.net/2117/2207 |
| Access Level: | acceso abierto |
| Palabra clave: | Swelling soils Radioactive waste disposal Bentonite swelling soils disposal barriers transfer mechanisms nuclear wastes bentonite Residus radioactius -- Emmagatzematge Bentonita Mecànica dels sòls |
| Sumario: | A fully coupled advanced formulation for heat, liquid and gas transfer in unsaturated deforming soils is presented. Balance equations are rooted in the theory of mixtures. A double porosity model, which is believed to be especially relevant when simulating expansive soils, is proposed to characterize the water transfer mechanism. Another relevant feature of the fra- mework developed, is the incorporation of a consistent elastoplastic model to describe stress± strain relationships in unsaturated soils. A ¯exible FE computer program was developed, including an array of alternative numerical strategies and constitutive equations to enhance its capabilities. The experimental results of a hydration and heating experiment performed on con®ned expansive bentonite were satisfactorily compared with model simulations. |
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