References of "Delvoie, Simon"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailEtude de la séquence stratigraphique des loess de la carrière de Romont (Eben-Emael, Belgique) par une campagne géotechnique
Delvoie, Simon ULg; Pirson, Stéphane ULg; Charlier, Robert ULg et al

in Notae Praehistoricae (in press), 36

The Romont quarry is recently considered as a new type section for the Middle Belgium loess deposits. The site displays a nearly 10 m thick loess sequence mainly dating from the Upper Pleistocene. The ... [more ▼]

The Romont quarry is recently considered as a new type section for the Middle Belgium loess deposits. The site displays a nearly 10 m thick loess sequence mainly dating from the Upper Pleistocene. The Rocourt Pedocomplex, the Humiferous Complex of Remicourt, the Malplaquet Soil and the Nagelbeek Tongued Horizon are especially well developed. Classical approaches to study the loess sequence need observable sections. Unfortunately these sections are rare in Middle Belgium, often temporary and not deep enough. To identify reference horizons, archaeologists and geologists use to resort to hand auger sampling techniques. Investigation of loess by cone penetration tests could offer an alternative to the lack of outcrops and could be used complementary to hand drilling techniques. This study focuses on a methodology to approach as a first step the loess sequence to identify the presence or not of some layers and their extension. The investigation campaign performed on the site of Romont aims to define reference horizons based on mechanical properties by comparison with an observable outcrop. Then 16 cone penetration tests have been realized behind the working face. The campaign results reveal the existence of some horizons into the loess sequence. The transition between the Humiferous Complex of Remicourt and the Rocourt Pedocomplex is the most noticeable horizon. These two pedostratigraphic units are important due to the presence of archaeological materials in Middle Belgium and borderlands. Closer to the surface the Nagelbeek Tongued Horizon and the decarbonation limit are also highlighted from results of the geotechnical campaign. [less ▲]

Detailed reference viewed: 39 (9 ULg)
Full Text
Peer Reviewed
See detailIn situ and laboratory mechanical characterization of a loess sequence from Middle Belgium
Delvoie, Simon ULg; Charlier, Robert ULg; Collin, Frédéric ULg

Conference (2016, May 25)

A 10 m thick loess (aeolian silt) layer located beside the Romont quarry (Eben-Emael, Middle Belgium) has been investigated in order to characterize the mechanical behaviour of the silty material. Cone ... [more ▼]

A 10 m thick loess (aeolian silt) layer located beside the Romont quarry (Eben-Emael, Middle Belgium) has been investigated in order to characterize the mechanical behaviour of the silty material. Cone penetration tests (CPT) have been performed with different cones (M1-type, M2-type and electric) in order to evaluate the influence of the cone on the mechanical behaviour interpretation. Concurrently, laboratory tests have been performed on undisturbed samples from core drillings. Laboratory tests consist of a physical characterization (grain size distribution, Atterberg limits) and a mechanical characterization (oedometer tests). This comprehensive investigation study focuses on the comparison of the loess characterization between in situ and laboratory approaches. CPT-based soil behaviour type charts are analyzed and compared with the Unified Soil Classification System. Many relations also exist in the literature between parameters obtained from CPT results and from laboratory tests. The study explores the existing relations between the cone resistance and the oedometer constrained modulus in order to verify the related coefficients proposed in the literature for silty material. [less ▲]

Detailed reference viewed: 35 (5 ULg)
Full Text
See detailEvaluation de la stabilité d'une paroi rocheuse à Flémalle
Delvoie, Simon ULg; Collin, Frédéric ULg

Report (2016)

La caractérisation détaillée du massif rocheux a été réalisée à partir de mesures in situ et d'observations. Ces données sont ensuite utilisées dans l'analyse de stabilité du massif rocheux. Un traitement ... [more ▼]

La caractérisation détaillée du massif rocheux a été réalisée à partir de mesures in situ et d'observations. Ces données sont ensuite utilisées dans l'analyse de stabilité du massif rocheux. Un traitement adéquat de la paroi est finalement proposé afin de minimiser les projections de blocs rocheux sur d'éventuels bâtiments sur le moyen et le long terme. [less ▲]

Detailed reference viewed: 23 (3 ULg)
Full Text
Peer Reviewed
See detailHeterogeneous bedrock investigation for a closed-loop geothermal system: A case study
Radioti, Georgia ULg; Delvoie, Simon ULg; Charlier, Robert ULg et al

in Geothermics (2016)

This paper investigates bedrock heterogeneity by applying three different geophysical approaches, in order to study the long-term behaviour and the interaction between closed-loop geothermal systems. The ... [more ▼]

This paper investigates bedrock heterogeneity by applying three different geophysical approaches, in order to study the long-term behaviour and the interaction between closed-loop geothermal systems. The investigated site consists of four boreholes equipped with geothermal pipes on the campus of University of Liege, Belgium. The first approach includes acoustic borehole imaging, gamma-ray logging and cuttings observation and results to a detailed fracture characterisation, rock identification and layer dip angle determination. The second approach consists of measuring the thermal conductivity of cuttings at the laboratory. Study of cuttings thermal conductivity measurements can contribute to bedrock heterogeneity knowledge concerning the transition of one formation to another and the layer dipping. The third approach is based on high-resolution temperature profiles, measured during the hardening of the grouting material and the recovery phase of a Distributed Thermal Response Test. Through this approach a correlation of the temperature profiles to the geological characteristics of the surrounding bedrock is identified. The analysis of this correlation can provide information on fractured zones, alternation of different rock types and layering dipping. This latter approach can be easily applied on closed-loop geothermal systems to characterise the bedrock and investigate its heterogeneity as well as contribute to the their long-term behaviour prediction and to the optimisation of their efficiency. [less ▲]

Detailed reference viewed: 40 (10 ULg)
Full Text
See detailCaractérisation géologique et mécanique d'une paroi rocheuse à Wegnez en vue de son excavation et de sa stabilisation
Delvoie, Simon ULg; Bertrand, François ULg; Collin, Frédéric ULg

Report (2015)

La caractérisation détaillée du massif rocheux a été réalisée à partir de mesures in situ et en laboratoire. Ces données sont ensuite utilisées dans l'analyse de stabilité du massif rocheux (stabilité d ... [more ▼]

La caractérisation détaillée du massif rocheux a été réalisée à partir de mesures in situ et en laboratoire. Ces données sont ensuite utilisées dans l'analyse de stabilité du massif rocheux (stabilité d'ensemble et stabilité de blocs selon un joint de discontinuité). L'étude présente également une analyse en vue d'estimer la ou les techniques d'excavation adéquates. [less ▲]

Detailed reference viewed: 18 (4 ULg)
Full Text
See detailWe gme P08: Fiber-optic temperature profiles analysis for closed-loop geothermal systems-a case study
Radioti, Georgia ULg; Delvoie, Simon ULg; Sartor, Kevin ULg et al

in Second EAGE Workshop on Geomechanics and Energy: The ground as energy source and storage (2015, October)

In order to study the behaviour of shallow closed-loop geothermal systems four borehole heat exchangers equipped with fiber optics were installed on the campus of the University of Liege (Liege, Belgium ... [more ▼]

In order to study the behaviour of shallow closed-loop geothermal systems four borehole heat exchangers equipped with fiber optics were installed on the campus of the University of Liege (Liege, Belgium) over a surface area of 32m². This paper presents the analysis of continuous, high-resolution temperature profiles measured along the boreholes length. The undisturbed ground temperature measurements indicate heat loss from ground structures located close to the boreholes. A 3D numerical model is presented to reproduce the measured temperature profiles. Temperature profiles during hardening of the grouting material indicate extended fractured zones in the rock mass. Temperature measurements during the recovery phase of a Distributed Thermal Response Test indicate the succession of rock layers with different mineral content. The results are in good agreement with those of the borehole televiewer logging method. The presented analysis could provide information on bedrock heterogeneity, on the anisotropic thermal behaviour of the rock mass and on the ground temperature variations due to heat loss from ground structures. These information could significantly contribute to the long-term behaviour prediction of the geothermal system and the geothermal reservoir potential. [less ▲]

Detailed reference viewed: 57 (23 ULg)
Full Text
See detailAnalysis of the retaining wall design problem in the framework of the Tyler Rationale
Charlier, Robert ULg; Bertrand, François ULg; Cerfontaine, Benjamin ULg et al

Poster (2015, September 28)

The coherence of any education system lies on the respect of the Tyler Rationale which puts the relationship between the objectives, the teaching method and the evaluation forward. The practical part of ... [more ▼]

The coherence of any education system lies on the respect of the Tyler Rationale which puts the relationship between the objectives, the teaching method and the evaluation forward. The practical part of the examination of the course of Geotechnics generally includes a retaining wall design problem. We listed and classified the mistakes identified in the student answers for the retaining wall design problem. In this classification, the mistakes specific to geotechnics are distinguished from the ones which are not specific to geotechnics. This list allows the teacher to be aware of the most common mistakes so he can insist on things not to do during the learning experiences. The classification is also fundamental. Indeed, if a student failed essentially because of a lack of pre-requisites, there is no reason he succeed by repeating the course in the same conditions. He should be therefore redirected to a self-regulating. [less ▲]

Detailed reference viewed: 29 (5 ULg)
Full Text
See detailMechanical approach for the characterization of loess deposits from the CBR’s Romont quarry (Eben-Emael, Belgium) and correlations with loess stratigraphy
Delvoie, Simon ULg; Boulvain, Frédéric ULg; Cerfontaine, Benjamin ULg et al

Conference (2015, June 01)

Aeolian silts (loess) are near surface deposits covering about 10% of the continent surfaces . Therefore a good knowledge of their mechanical behavior is an issue for designing subsurface engineering ... [more ▼]

Aeolian silts (loess) are near surface deposits covering about 10% of the continent surfaces . Therefore a good knowledge of their mechanical behavior is an issue for designing subsurface engineering structures. Usually this material is considered as homogeneous for an engineering point of view. Aeolian silt deposits are continuously well developed in Hesbaye Region (Belgium) reaching locally 20m thick (see document in attachment). They are mainly related to the last interglacial (Eemian) and glacial (Weichselian) periods . Nevertheless the pedostratigraphical, chronostratigraphical and paleoclimatic approaches have shown these silt deposits are usually composed of a series of paleosoils (i.e. Rocourt soil, Humiferous Complex of Remicourt, Harmignies Soil, Nagelbeek Tongued Horizon) interbedded with stratified or homogeneous aeolian silt layers. This study aims to characterize the variability of the in situ mechanical characteristics of the loess deposits from Hesbaye Region at the site scale and at the laboratory scale. Cone penetration tests (CPT), electrical resistivity tomographies (ERT) and drillings have been performed through a 10m thick loess layer in an investigation site located close to the CBR’s Romont quarry (Eben-Emael, Belgium) . Continuous undisturbed silt samples from drillings have been physically (granulometry, Atterberg limits, water content, organic matter content, carbonate content) and mechanically (oedometer test, triaxial test) characterized at the laboratory. Mechanical behavior and physical characteristics have underlined a series of layers with variable mechanical properties through depth. Some of these layers correlated with a detailed stratigraphy cross-section close to the investigation site could correspond to well-known paleosoils. [less ▲]

Detailed reference viewed: 73 (10 ULg)
Full Text
See detailSynthèse des données gétechniques nécessaires à l'étude de la stabilité de six terrils à risque en région liégeoise
Delvoie, Simon ULg; Collin, Frédéric ULg

Report (2015)

Dans le cadre d’un recensement des terrils situés en Région wallonne et pouvant présenter des risques de stabilité sur le court et le long terme, l’ISSeP a chargé le Laboratoire de Géotechnologies de ... [more ▼]

Dans le cadre d’un recensement des terrils situés en Région wallonne et pouvant présenter des risques de stabilité sur le court et le long terme, l’ISSeP a chargé le Laboratoire de Géotechnologies de l’Université de Liège, représenté par Ir. F. COLLIN et S. DELVOIE, de réaliser une étude géotechnique préliminaire. Les objectifs de ce travail sont tout d’abord de recenser les informations disponibles sur le sous-sol aux environs immédiats des terrils. Les données recueillies sont ensuite exploitées par des outils informatiques SIG et seront par la suite utilisées dans l’évaluation du risque d’instabilité, réalisée par l’ISSeP. Ce travail documentaire est également complété par une inspection sur le terrain de chaque terril étudié. Les terrils faisant partie de l’étude géotechnique sont repris dans la liste ci-dessous : - L60 – Petite Bacnure - L53 – Gosson 2 - L39 – Bonne Espérance et Bonne Fortune - L46 – Xhorre - L41 – Espérance 3 - L55 – Horloz [less ▲]

Detailed reference viewed: 33 (5 ULg)
Full Text
Peer Reviewed
See detailFractured bedrock investigation by using high-resolution borehole images and the Distributed Temperature Sensing technique
Radioti, Georgia ULg; Delvoie, Simon ULg; Radu, Jean-Pol ULg et al

in ISRM Congress 2015 Proceedings - Int’l Symposium on Rock Mechanics (2015, May)

In order to investigate the fracturing of the bedrock and its possible heterogeneous distribution in situ, four boreholes equipped with double-U geothermal pipes of 100 m long were installed on the campus ... [more ▼]

In order to investigate the fracturing of the bedrock and its possible heterogeneous distribution in situ, four boreholes equipped with double-U geothermal pipes of 100 m long were installed on the campus of the University of Liege (Liege, Belgium) over a surface area of 32 m². The bedrock, which starts at a depth approximately of 8 m, is quite fractured and consists mainly of siltstone and shale interbedded with sandstone. Different geophysical methods are applied at two different phases, after drilling the boreholes and after injecting the grouting material. The first approach consists in lowering an ultrasonic borehole imager (borehole televiewer; Zemanek, Glenn, Norton, & Caldwell, 1970), an instrument that acts as an ultrasonic transducer and receiver, into the boreholes to obtain high-resolution, continuous images with 360° coverage of the local geology and fracturing. Moreover gamma-ray logs of the four boreholes are obtained and inclinometry is conducted. After drilling the boreholes fiber optic cables are attached along the pipe loops and the double-U pipes are installed inside the boreholes. Then the grouting material is injected. The second approach consists in measuring the temperature along the fibers by applying the Distributed Temperature Sensing technique (Soto, Sahu, Faralli, Bolognini, Di Pasquale, Nebendahl, & Rueck, 2007). A laser pulse is injected into the optical fiber and the temperature along the fiber is determined by the intensity of Raman stokes and anti-stokes reemitted signals. Temperature evolution is measured during hardening of the grouting material. Local maxima of the temperature curve are probably due to a local lower thermal conductivity and/or a local larger quantity of grouting material due to gathering of fractures. A detailed fracture characterisation (position, opening, orientation, dip angle) is obtained based on the acoustic signal travel time and amplitude. The fractures are characterised by the same dipping and orientation but significantly vary in number and location in the four boreholes, despite the close distance between them. Gamma-ray data and observation of the cuttings during drilling result in rock identification through depth as well as in determination of the layer dipping. The inclination of the four boreholes tends to be perpendicular to the dipping. The combination of the two geophysical methods as presented provides information useful for the hydro-thermo-mechanical behaviour of the bedrock. The contribution of the thermal behaviour of borehole heat exchangers to bedrock investigation will be further studied by conducting Distributed Thermal Response tests (Fujii, Okubo, & Itoi, 2006). During the tests we will measure the temperature variation thanks to the installed fiber optics. These data will allow us to correlate any anisotropic thermal behaviour to the geological characteristics. The available information could be used for a detailed numerical model. [less ▲]

Detailed reference viewed: 132 (28 ULg)
Full Text
See detailEtude géologique et géophysique en vue de la construction d'un bassin d'orage à Jupille, rue de Beyne
Delvoie, Simon ULg; Collin, Frédéric ULg

Report (2014)

Une série de profils de résistivité électrique ont été réalisés en vue de repérer d'éventuels puits de mine au sein du bedrock houiller.

Detailed reference viewed: 22 (4 ULg)
Full Text
See detailEtude géologique et géophysique en terrain karstique du projet de lotissement à Heusy, avenue du Chêne
Delvoie, Simon ULg; Collin, Frédéric ULg

Report (2014)

Une série de profils de résistivité électrique ont été réalisés afin de préciser la délimitation des terrains carbonatés (Formation de Nèvremont) et de repérer d'éventuels édifices karstiques.

Detailed reference viewed: 25 (3 ULg)
Full Text
See detailStation de pompage de Jemeppe-sur-Meuse : suivi de forages et rapport de synthèse
Delvoie, Simon ULg; Collin, Frédéric ULg

Report (2014)

Suivi et analyse de neuf forages carottés réalisés à Jemeppe-sur-Meuse au sein de roches houillères. Les forages atteignent des cotes entre +35,00 et +31,00 m.

Detailed reference viewed: 38 (5 ULg)
Full Text
See detailEtude géologique en vue de la réfection et démolition partielle d'un mur de soutènement, gare de Dinant
Delvoie, Simon ULg; Collin, Frédéric ULg

Report (2013)

Réalisation de trois forages carottés verticaux et 6 forages carottés horizontaux afin de déterminer l'épaisseur de sédiments meubles en tête de paroi, le type de roche en présence et son état de ... [more ▼]

Réalisation de trois forages carottés verticaux et 6 forages carottés horizontaux afin de déterminer l'épaisseur de sédiments meubles en tête de paroi, le type de roche en présence et son état de fracturation, ainsi que la présence de vides en arrière du mur de soutènement. Cette analyse a pour objectif de proposer un avis sur la stabilité du massif en arrière du mur de soutènement en vue de sa réfection et de sa démolition partielle. [less ▲]

Detailed reference viewed: 29 (4 ULg)
Full Text
See detailEtude détaillée de la stabilité d'une paroi rocheuse située à Couillet
Delvoie, Simon ULg; Schroeder, Christian; Collin, Frédéric ULg

Report (2012)

Detailed reference viewed: 49 (11 ULg)