Papers by Jean-Jacques FRY
Localization and quantification of leakages in dams using time-lapse self-potential measurements associated with salt tracer injection
Journal of Hydrology, Jun 1, 2011
ABSTRACT
Preferential fluid flow pathways in embankment dams imaged by self‐potential tomography
Near Surface Geophysics, Mar 1, 2009
We invert self-potential data in order to locate anomalous water flow pathways in dams and embank... more We invert self-potential data in order to locate anomalous water flow pathways in dams and embankments and to estimate the seepage velocity. The inversion of the self-potential data is performed using the modified singular value decomposition for the inverse problem using a linear formulation of the forward problem. The kernel is solved numerically accounting for the topography of the system and the resistivity distribution, which is independently obtained through electrical resistance tomography. A prior constraint based on finite element modelling of ground water flow can also be used to provide a prior source current density model if needed. This self-potential tomography approach is first validated with a synthetic case study showing how the position of a preferential fluid flow pathway can be retrieved from self-potential and resistivity data and how the seepage velocity can be obtained inside one order of magnitude. This methodology is then applied to a test site corresponding to a portion of an embankment dam along the Rhone River in France. Two self-potential maps (with 1169 and 2076 measurements, respectively) and four resistivity tomograms are used to locate a leak. One self-potential profile and one resistivity profile are used together to perform the 2D inversion of the self-potential data to locate the anomalous leakage at depth and to estimate the flow rate. The depth at which the preferential fluid flow pathway is located, according to self-potential tomography, agrees with an independent geotechnical test using the Permeafor. This demonstrates the usefulness of this methodology to detect preferential water channels inside the body of a dam.
Failure and reinforcement of the Mondely wet clay dam and feedback from the operation
HAL (Le Centre pour la Communication Scientifique Directe), 1997
Analyse des ruptures de barrages de hauteur inférieure à 30 m, leçons pratiques à en tirer = Analysis of failures of dams less than 30 m, high practical lessons
HAL (Le Centre pour la Communication Scientifique Directe), 1997
Use of a geotechnical survey with high effectiveness on the Vallabrègues scheme
HAL (Le Centre pour la Communication Scientifique Directe), 2005
The use of lime treated soils in water retaining structures
HAL (Le Centre pour la Communication Scientifique Directe), Apr 19, 2018
Leakage detection on dykes through temperature measurements along boreholes or optic fibers
HAL (Le Centre pour la Communication Scientifique Directe), 2005
The lime treated soil: an erosion resistant material for hydraulic structures
HAL (Le Centre pour la Communication Scientifique Directe), Jun 12, 2013
Use of lime treated soils in hydraulic earth structures - Backgrounder
HAL (Le Centre pour la Communication Scientifique Directe), 2015
Internal erosion in hydraulic embankments - "ERINOH" guidelines / vol. 2 : internal erosion diagnosis methodology applied to embankments dikes
HAL (Le Centre pour la Communication Scientifique Directe), 2016
Projet et construction de remblais constitués de matériau de qualité médiocre : exemples d'application = Design and construction of embankments of poor quality material: examples of applications
HAL (Le Centre pour la Communication Scientifique Directe), 1991
Réalisation des ouvrages d'étanchéité en sol compacté
HAL (Le Centre pour la Communication Scientifique Directe), 2017
-Le présent fascicule propose d'harmoniser les pratiques sous forme de recommandations p... more -Le présent fascicule propose d'harmoniser les pratiques sous forme de recommandations pour la réalisation d'ouvrages d'étanchéité en sol compacté. Le but est de faire connaître ces pratiques et de promouvoir leur utilisation dans toutes les activités de ce secteur. Ce fascicule d'adresse à un large public pour lequel des connaissances de base en matière de géotechnique et de terrassements sont indispensables : personnel des entreprises de travaux à divers niveaux, autorités et organismes de contrôle, bureaux d'études et de conception, exploitants d'ouvrages. Il comprend les informations pour évaluer l'applicabilité des techniques en général ou dans des cas particuliers. Il comporte quatre chapitres techniques, de l'étude à la réalisation des ouvrages, permettant de mener un projet à son terme. Il doit être considéré comme un document de référence à consulter avec d'autres publications de l'AFNOR et du BNTRA et avec le guide technique de réalisation des remblais et des couches de forme (GTR, aux éditions SETRA-LCPC). Ce fascicule définit les conditions de réutilisation de matériaux naturels ou traités ayant vocation à constituer une étanchéité. Ces conditions s'appliquent à la réalisation d'ouvrages ayant une fonction de protection de l'environnement ou une fonction hydraulique tels que barrières étanches, noyaux d'ouvrage hydraulique ou masques d'étanchéité. La méthodologie décrite dans ce fascicule allie les performances de faible perméabilité et les conditions de mise en oeuvre. Elle ne traite pas de la recherche d'autres performances comme la résistance mécanique (stabilité, résistance à l'érosion, ...) ou la résistance chimique des matériaux propres à la conception des ouvrages. Moyennant la recherche de ces autres performances, ces recommandations s'appliquent à la réalisation des ouvrages ou des parties d'ouvrage liées à : - Ouvrages fonction protection de l'environnement - La gestion des déchets dangereux et non dangereux (casiers de stockage, bassin de lixiviats, ...) - La gestion des résidus miniers susceptibles d'avoir un impact sur l'environnement - Des opérations de confinements dans le domaine des sites et sols pollués - Bassins de rétention, de traitement des eaux pour éviter la pollution des nappes - Ouvrages fonction hydraulique - Des ouvrages d'étanchéité en remblai (barrages, digues, bassins, etc.) - Des masques d'étanchéité en argile (digues, bassins et fossés, etc.
The flooding hazard. State of the art prior to the elaboration of the flooding guide for nuclear installations
Lime treated materials for embankment and hardfill dam
This paper describes the SOTREDI project, "Soil TREatment for Dikes", undertaken by Lho... more This paper describes the SOTREDI project, "Soil TREatment for Dikes", undertaken by Lhoist Group, a lime producer, since 2005. This project was led in partnership with research centres and universities, and presents some potential applications. The objective was to demonstrate that soil treatment with lime, besides enhancing the materials workability, confers high levels of mechanical properties, low permeability values, and is likely to reduce piping and internal erosion hazards, and to significantly increase the erosion resistance against overtopping and overflowing. This paper is a first step toward the application of lime-treated soils in earthen hydraulic structures (namely canals, dams, dikes and levees).
Kalkbehandlung: neue Perspektiven für den Einsatz schluffiger und toniger Erden im hydraulischen Erdbau
HAL (Le Centre pour la Communication Scientifique Directe), May 15, 2013
Utilisation des sols traités à la chaux dans les digues fluviales - DigueElite - Rapport final de projet
Small dams and dikes in treated soils: materials, concepts, behaviour, returns of experience and innovation
HAL (Le Centre pour la Communication Scientifique Directe), Jul 1, 2018
E3S Web of Conferences
Existing dams are mainly used for creating along river reservoirs filled by gravity. The potentia... more Existing dams are mainly used for creating along river reservoirs filled by gravity. The potential of new dams for such uses is limited in most countries by the lack of sites, the competitive cost of wind or solar energy supply and the criticism of environmental impacts. But there is a huge potential of large new reservoirs filled by pumping. Such use will probably be very important after 2030 for storage of wind and solar energy which will become the main sources of electricity. Very large off rivers reservoirs have a huge future as well for seasonal water storage as for floods mitigation. Environmental impacts of such uses are usually better than for traditional ones. Yearly investments for new dams may be in 2040 much more important than ever in the past. Dams’ designs may be traditional or innovative.
Hydropower, a catalyst for energy transition in Europe
LHB
International audienceThe issue of the seismic stability of embankments has been raised by severa... more International audienceThe issue of the seismic stability of embankments has been raised by several recent events. Given their very large cumulated length, together with the large variability of their owners, it is rarely possible to perform detailed investigations and complex numerical simulations, especially in moderate seismicity areas. Analyzing their capacity to withstand seismic loading thus requires the use of simple tools, based on a few easily available parameters. This work aims at providing an easy-to-use tool to assess peak acceleration at crest of embankments and peak acceleration of potential sliding blocks then allowing to evaluate their stability in case of earthquake. It is based on a 2D numerical parametric study combining 135 realistic configurations of embankments and natural soil layers, and four loading levels, characterized by peak acceleration at outcropping bedrock (0.01g, 0.1g, 0.3g and 0.5g). For each configuration and loading level, nonlinearity is taken i...
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Papers by Jean-Jacques FRY