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Journal of Porous Media
Factor de Impacto: 1.49 Factor de Impacto de 5 años: 1.159 SJR: 0.504 SNIP: 0.671 CiteScore™: 1.58

ISSN Imprimir: 1091-028X
ISSN En Línea: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v20.i3.20
pages 205-216

PHYSICAL AND ANALYTICAL MODELING OF INTERNAL EROSION OF FINE PARTICLES IN COHESIONLESS SOILS

Ahmed Benamar
Normandie University, UNIHAVRE, CNRS, LOMC, 53 rue Prony, CS 80540, 76058 Le Havre Cedex, France
Abdelghani Seghir
Laboratoire de Recherche en Hydraulique Appliquée et Environnement (LRHE), University A. Mira of Bejaia, Targua-Ouzemour, Bejaia 06000, Algeria

SINOPSIS

This paper focuses on the experimental and analytical study devoted to internal erosion (suffusion) of sand-clay mixtures made of different fines contents and tested under head controlled flow. The investigations aim to evaluate a simplified analytical model using experimental results obtained from laboratory column tests. The analytical model is based on the integration of the transport equation of particles in a homogeneous porous medium subjected to different hydraulic gradients. The adjustment of the derived analytical solution with experimental results, carried out on several samples under different conditions, allowed us to identify the model parameters using empirical expressions. The results showed mainly that the detachability parameter deceases when fines content increases. In addition, the erosion trigger law has been adapted to the volume erosion and is used to estimate the critical shear stress and the internal erosion coefficient of the studied soil.


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