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Etude expérimentale et théorique de l'injection d'une suspension dans un milieu granulaire. Application aux coulis de ciment

Abstract : This work deals with the problem of suspension flow in a porous medium in presence of filtration, with application to the injectability of a cement grout in a sand matrix. A theoretical model has first been developped to describe the flow of the suspension within the porous medium. The model is of the macroscopic type, based on the mass conservation equations, Darcy's law and on the definition of evolution laws for the intrinsic permeability of the porous medium and for the volume filtration rate. The flow problem is then numerically solved based on finite elements method, for the one-dimensional case as well as for the radial case. In order to propose pertinent laws for the evolution of permeability and filtration rate, a specific experimental device was developped allowing the injection of small thickness samples. In particular, this device has allowed to study the influence of significant parameters on the injection process. Furthermore, some tests have been carried out on other experimental devices (short columns and long columns devices) in order to better understand the injection mechanisms. The results obtained have allowed to show the pertinence of a linear evolution law for the filtration rate and of a hyperbolic evolution law for the intrinsic permeability of the porous medium. Finally, a first validation of the proposed model has been done based on complementary results obtained on long columns.
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https://pastel.archives-ouvertes.fr/pastel-00000823
Contributor : Ecole Des Ponts Paristech <>
Submitted on : Friday, September 3, 2010 - 10:08:46 AM
Last modification on : Wednesday, November 29, 2017 - 9:52:28 AM
Long-term archiving on: : Friday, September 10, 2010 - 3:26:52 PM

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  • HAL Id : pastel-00000823, version 1

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Zied Saada. Etude expérimentale et théorique de l'injection d'une suspension dans un milieu granulaire. Application aux coulis de ciment. Planète et Univers [physics]. Ecole des Ponts ParisTech, 2003. Français. ⟨NNT : 2003ENPC0025⟩. ⟨pastel-00000823⟩

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