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Theses

Caractérisation du comportement hydraulique et mécanique des géocomposites bentonitiques et d'autres systèmes géosynthétiques utilisés en couverture de centres de stockage de déchets

Abstract : This Thesis deals with the gas permeability and interface shear strength of Geosynthetic Clay Liners (GCLs) and other geosynthetic systems that compose the cover of sanitary landfills. Regarding the gaseous flow, the research shows the development and testing of a new equipment and methodology developed to measure the gas permeability of GCLs under transient flow. The new methodology when compared with the conventional methodology of measuring gas permeability uses simpler equipment that yielded similar results in a quick and faster way. Shear strength interface was measured using the inclined plane apparatus with the specimens under low confining stresses. The investigation showed that geosynthetics are sensible to accumulated deformation on their face what can increase or reduce the shear strength interface. The test results also allowed determining the resistant behavior of compacted soil-geosynthetic interface. The supposition that the soil interfaces are critical in cover systems and that they need a reinforcement geosynthetic is questioned based on test results. The inclined plane apparatus was also used to measure the GCL-geosynthetic shear strength interfaces especially considering the influence of bentonite hydration, drying-wetting cycles, the flow of water on the interface and the types of materials in contact.
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https://tel.archives-ouvertes.fr/tel-00260493
Contributor : Heraldo Nunes Pitanga <>
Submitted on : Tuesday, March 4, 2008 - 12:27:15 PM
Last modification on : Thursday, November 19, 2020 - 3:54:29 PM
Long-term archiving on: : Thursday, May 20, 2010 - 8:49:09 PM

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  • HAL Id : tel-00260493, version 1

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Heraldo Nunes Pitanga. Caractérisation du comportement hydraulique et mécanique des géocomposites bentonitiques et d'autres systèmes géosynthétiques utilisés en couverture de centres de stockage de déchets. Sciences de l'ingénieur [physics]. Université Joseph-Fourier - Grenoble I, 2007. Français. ⟨tel-00260493⟩

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