Lyesse Laloui - Selected Publications#
Similarity solution for cavity expansion in thermoplastic soil
Zhou, H., Kong, G., Liu, H., Laloui, L.
International Journal for Numerical and Analytical Methods in Geomechanics, 2018, Vol. 42(2), pp. 274–294 – Citation Scopus: 80
For the first time, this paper presents an analytical solution for cavity expansion in thermoplastic soil under non-isothermal conditions. Laloui's advanced and unified constitutive model for environmental geomechanical thermal effect (ACMEG-T) describes the constitutive relationship of thermoplasticity. It has gone on to be used as a theoretical tool in geotechnical engineering problems, such as thermal cone penetration tests and nuclear waste disposal problems.
Group action effects caused by various operating energy piles
Rotta Loria, A.F., Laloui, L.
Geotechnique, 2018, Vol. 68(9), pp. 834–841 - Citation Scopus: 51
Before this paper, no investigation of the thermally-induced "group action" in energy piles had been conducted. Results of a full-scale field test show that when the number of operating energy piles increases, greater thermally-induced vertical strain and lower stress develop along the piles for the same average temperature change.
3-D micro-architecture and mechanical response of soil cemented via microbial-induced calcite precipitation
Terzis, D., Laloui, L.
Scientific Reports, 2018, Vol. 8(1), page 1416 - Citation Scopus: 106
This paper investigates MICP efficiency and reproducibility for geotechnical engineering applications, revealing a discrepancy between the compressive strengths of medium and fine-grained bio-cemented sands. To understand the observed discrepancies, Laloui utilized a series of microstructural inspection tools extending beyond conventional qualitative and textural characterization and provided new insights into the material's peculiar 3D micro-architecture.
Cyclic load-transfer approach for the analysis of energy piles
Sutman, M., Olgun, C.G., Laloui, L.
Journal of Geotechnical and Geoenvironmental Engineering, 2019, Vol. 145(1) - Citation Scopus: 52
Energy piles are subject to temperature cycles during their lifetime. However, little is known about their response to cyclic thermal load applications. Using a full-scale field test with multiple heating–cooling cycles on three energy piles, Laloui developed a finite-element model linking a load-transfer approach with the Masing rule to define the energy pile-soil interaction during heat exchange operations. Results showed that the model predicted the cyclic thermal behavior of energy piles satisfactorily, revealing that the development of appropriate load-transfer curves representing the soil–pile interaction is paramount.
Analysis and Design of Energy Geostructures: Theoretical Essentials and Practical Application
Laloui, L., Loria, A.F.R.
Analysis and Design of Energy Geostructures: Theoretical Essentials and Practical Application, 2019, pp. 1–1062 - Citation Scopus: 55
For the first time, this book gathers, in a unified framework, the theoretical and experimental competence available on energy geostructures: innovative multifunctional earth-contact structures that can provide renewable energy supply and structural support to any built environment. The book covers the broad, interdisciplinary, and integrated knowledge required to address the analysis and design of energy geostructures from energy, geotechnical, and structural perspectives.
Cell-free soil bio-cementation with strength, dilatancy and fabric characterization
Terzis, D., Laloui, L.
Acta Geotechnica, 2019, Vol. 14(3), pp. 639–656 - Citation Scopus: 60
The paper suggests a new way to induce "cell-free" soil bio-cementation and comprehensively describe bio-improved mechanical and microstructural properties. Investigating the strength and stiffness parameters of three base geo-materials that are subjected to MICP, results reveal that MICP adapts differently to the adopted base materials. Crystalline particles are found to grow larger in the medium-grained base material and yield more homogenous spatial distributions.
Induced seismicity in geologic carbon storage
Vilarrasa, V., Carrera, J., Olivella, S., Rutqvist, J., Laloui, L.
Solid Earth, 2019, Vol. 10(3), pp. 871–892 - Citation Scopus: 63
Geologic carbon storage and geo-energy applications cause changes in rock stress field and may induce (micro)seismicity. However, the causes for triggering induced seismicity are numerous and complex, making forecasting difficult with current predictive models. By reviewing the triggering mechanisms of induced seismicity, Laloui proposed a methodology based on proper site characterization, monitoring, and pressure management to minimize induced seismicity.
Long-term performance and life cycle assessment of energy piles in three different climatic conditions
Sutman, M., Speranza, G., Ferrari, A., Larrey-Lassalle, P., Laloui, L.
Renewable Energy, 2020, Vol. 146, pp. 1177–1191 - Citation Scopus: 43
Energy piles allow the exploitation of geothermal energy to meet buildings' heating/cooling demands in an efficient and environment-friendly manner. For the first time, this paper explores the long-term performance of energy piles in different climatic conditions and their environmental impacts, showing that energy pile systems can meet the majority of the heating/cooling demands, except during the peak demands results in a significant reduction in environmental impacts in the majority of the examined cases.
Numerical investigation of the convection heat transfer driven by airflows in underground tunnels
Peltier, M., Rotta Loria, A.F., Lepage, L., Garin, E., Laloui, L.
Applied Thermal Engineering, 2019, Vol. 159 - Citation Scopus: 42
This study presents a fundamental investigation of the convection heat transfer phenomenon driven by airflows in underground tunnels. Using three-dimensional thermo-hydraulic Computational Fluid Dynamics simulations accounting for the actual fluid flow, the results highlight a crucial influence of shape, inlet airflow velocities, and surface wall(s) roughness on the convection heat transfer phenomenon, which is inherently related to the development of the thermal and velocity boundary layers.
A decade of progress and turning points in the understanding of bio-improved soils: A review
Terzis, D., Laloui, L.
Geomechanics for Energy and the Environment, 2019, Vol. 19 - Citation Scopus: 80
This review aimed to shape a complete and comprehensive understanding of the progress reported in bio-mediated soil improvement. Specific focus is put on pivotal points in this decade-long path which is marked by proof of fundamental concepts at multiple scales. As soil bio-reinforcement makes its steps towards claiming a spot in mainstream geotechnical practice, this review looks back on how far research has come and looks forward by evaluating the opportunities and challenges ahead.
