FRANÇAIS
A showcase of ÉTS researchers’ publications and other contributions
SEARCH

Erosion monitoring during core overtopping using a laboratory model with digital image correlation and X-ray microcomputed tomography

Downloads

Downloads per month over past year

Dumberry, Kevin, Duhaime, François et Éthier, Yannic. 2018. « Erosion monitoring during core overtopping using a laboratory model with digital image correlation and X-ray microcomputed tomography ». Canadian Geotechnical Journal = Revue Canadienne de Géotechnique, vol. 55, nº 2. pp. 234-245.
Compte des citations dans Scopus : 2.

[img]
Preview
PDF
Duhaime F 2017 15620 Erosion monitoring during core overtopping.PDF - Accepted Version
Use licence: All rights reserved to copyright holder.

Download (2MB) | Preview

Abstract

Core overtopping in embankment dams is an important phenomenon that may lead to contact erosion along the core/filter interface. This paper presents new experimental results regarding erosion mechanisms at the core/filter interface during core overtopping. The experimental results were obtained using a reduced-scale model with a variable upstream water level. Digital image correlation (DIC), microcomputed tomography (µCT) and sediment collection at the outlet were used to quantify erosion. Four experimental runs were conducted with a till core and different filters. Only one of the four filters satisfied the filter criteria that were applied. No contact erosion occurred during this test. For filters that did not respect the filter criteria, piping occurred within the core along the downstream slope when the water level reached the top of the core. As a result of the self-healing process within the core material, the erosion rate decayed with time as the hydraulic gradient increased. Results for DIC mainly reflected settlements within the filter due to erosion and a soil arching effect. The magnitude of the displacement vector obtained with DIC is directly proportional to the volume of till eroded. μCT showed that contact erosion occurred continuously.

Item Type: Peer reviewed article published in a journal
Professor:
Professor
Duhaime, François
Éthier, Yannic A.
Affiliation: Génie de la construction
Date Deposited: 17 Jul 2017 13:26
Last Modified: 23 Feb 2018 20:51
URI: http://espace2.etsmtl.ca/id/eprint/15620

Actions (login required)

View Item View Item