Contact erosion process in dykes
type: Dataset
description: Contact erosion is a type of internal erosion which occurs at the interface between two soil layers of different particle sizes. Particles from the fine soil (sand, silt, clay…) are pulled and driven by the flow through the pores of the surrounding coarse soil (gravel ...). Although its presence is suspected in many earthfill embankments, this process has been little studied so far. The aim of this thesis was to better understand and, possibly, to model contact erosion. At pore scale, the flow at the interface between two porous media was characterized thanks to an experimental device, developed in Cemagref, combining Planar Laser Induced Fluorescence, PIV method and Refractive Index Matching. The spatial variability of flow shear stress has been emphasized. At sample scale, several tests on real and reconstituted soils were carried out in LTHE, in order to identify the phenomena involved in contact erosion. Erosion rates as a function of flow magnitude have also been measured for different types of fine and coarse soils. Then, a stochastic model was proposed to account for these experiments. Finally, large scale tests were conducted in the laboratory of Compagnie National du Rhône, to study the influence of scale effects as well as the consequences of contact erosion on global behavior and integrity of the embankment structure. The possibility of piping initiation by contact erosion was underlined. This thesis is part of the project ERINOH project and was funded by EDF-CIH.
landing page: https://theses.hal.science/tel-00680078
identifier: NNT: 2011GRENU044
keyword: digues-fluviales
keyword: erosion-interne
keyword: experimental
keyword: fluvial-dikes
keyword: hydraulics
keyword: hydraulique
keyword: infoeu-reposemanticsdoctoralthesis
keyword: internal-erosion
keyword: mecanique-des-sols
keyword: multiscale
keyword: sdustusciences-of-the-universe-physicsearth-sciences
keyword: soil-mechanics
keyword: theses
issued: 2026-05-24T08:36:04.723632
modified: 2026-05-24T08:36:04.723640
language: fr
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

Contact erosion process in dykes
type: Distribution
format: HTML
access URL: https://theses.hal.science/tel-00680078
issued: 2026-05-24T08:36:04.811936
modified: 2026-05-24T08:36:04.678662