Lyesse Laloui
École Polytechnique Fédérale de Lausanne
Porous mediumHeat exchangerPileGeologyEngineeringFinite element methodOil shaleSoil waterComposite materialEnergy (signal processing)Geotechnical engineeringMaterials scienceConstitutive equationThermalSuctionEnvironmental scienceMechanicsStructural engineeringEffective stressStress (mechanics)
580Publications
52H-index
7,968Citations
Publications 569
Newest
Abstract This study explores and validates a machine learning approach for the practical, effective, and precise prediction of the thermo-physical characteristics that are essential for the analysis and design of shallow geothermal systems, including borehole heat exchangers: (i) undisturbed ground temperature, (ii) ground effective thermal conductivity, and (iii) borehole thermal resistance. Benefiting from 174 thermal response tests from central and western Switzerland, the algorithm is used t...
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#1Lyesse Laloui (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 52
#2Melis Sutman (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 9
Last. Melis Sutman (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 1
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Abstract Geothermal operation of energy piles involves an interplay between the multi-physical phenomena governing the behaviours of soils, geostructures and the interactions between them, which are mainly characterized by the associated temperature variations. This state-of-the-art paper brings together the experimental findings from several field and laboratory investigations to attain a thorough understanding of the responses of soils and soil–structure interfaces under non-isothermal conditi...
4 CitationsSource
#1Elena Ravera (École nationale de l'aviation civile)H-Index: 2
#2Melis Sutman (Heriot-Watt University)H-Index: 9
Last. Lyesse Laloui (École nationale de l'aviation civile)H-Index: 52
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Understanding the behaviour of soil-structure interfaces is critical for addressing the analysis and design of energy geostructures. In this study, the interface failure mechanism of energy piles (...
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#1Eleonora Crisci (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 3
#2Alessio Ferrari (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 26
Last. Lyesse Laloui (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 52
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Abstract Opalinus Clay is the shale currently under investigation as the host formation for geological radioactive waste disposal in Switzerland. Its hydromechanical response has been widely studied, and the experimental results show a range of values whose dispersion needs to be clarified. This work aims to explain the dispersion in the literature results by correlating the hydro-mechanical response to the mineralogical variability of the tested specimens . Based on published microstructural st...
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#1Roba Houhou (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 1
#2Melis Sutman (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 9
Last. Lyesse Laloui (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 52
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Abstract The response of clayey materials to thermal variation has been the subject of extensive studies, given the wide range of engineering applications which involve subjecting soils to substantial temperature fluctuations. A number of hypotheses have been proposed to explain the volumetric changes induced in the clays as a result of temperature variations. Most associate the observed volumetric changes to re-orientation as well as changes in the clay microstructure, with no microstructural e...
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Abstract Limit-state analysis of soil-structure interacting systems is a classical problem in theoretical and applied soil mechanics. Usually, the capacities of both components are evaluated separately. However, it is well known that soil-structure interaction plays a major role in the actual behaviour at failure of such systems. Despite the complexity of a rigorous mathematical treatment of the problem, the limit theorems of the theory of plasticity and appropriate consideration of the failure ...
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#1Jacopo Zannin (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 2
#2Alessio Ferrari (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 26
Last. Lyesse Laloui (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 52
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Abstract Energy geostructures (EGs) employ heat exchangers embedded in concrete geostructures, such as piles, walls, tunnels, and sewers. In this study, energy walls (EWs) are studied with an emphasis on the following objectives: (1) to understand the fundamentals of hydrothermal interactions acting in the vicinity of EWs caused by groundwater seepage in saturated soil; (2) to highlight hydraulically induced thermal effects and their consequences on the thermal performance of EWs. Extensive thre...
4 CitationsSource
#1Yafei Qiao (Tongji University)H-Index: 4
#2Angelica Tuttolomondo (EPFL: École Polytechnique Fédérale de Lausanne)
Last. Wenqi Ding (Tongji University)H-Index: 13
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Abstract This paper introduces a novel soil water retention curve model that considers two different mechanisms of water retention – namely capillarity and adsorption – and their evolution with soil fabric along a generalized stress path. The model is formulated based on a new developed framework, which is justified against experimental evidence and incorporates the following developments: (i) the characteristics of the capillary and adsorption water retention curves are identified, and an ad-ho...
2 CitationsSource
#1Alberto Minardi (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 6
#2Silvio GigerH-Index: 4
Last. Lyesse Laloui (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 52
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Abstract Triaxial testing of argillaceous rocks and shales is significantly more challenging than conventional rock mechanical testing. The challenges are mainly related to the very low permeability of these geomaterials, and their sensitivity to exposure of atmosphere and brines, which induces variations of water content, suction and effective stress. There are currently no international standards to guide service laboratories for robust testing procedures for shales. A benchmark study of undra...
3 CitationsSource
#1Marianna AdinolfiH-Index: 5
#2Alessandro F. Rotta Loria (NU: Northwestern University)H-Index: 12
Last. Stefano AversaH-Index: 11
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Abstract One-of-a-kind experimental and numerical investigation is provided in this paper about energy sheet pile walls: earth retaining structures that embed heat exchanger probes within piles for the exploitation of shallow geothermal energy. The study resorts to the results of full-scale in situ tests and coupled three-dimensional thermo-mechanical finite element analyses of an energy sheet pile wall constructed in an underground station. In this context, an investigation about the influence ...
3 CitationsSource