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Lyesse Laloui

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Related publications (386)

In-situ testing of a heat exchanger pile

The behavior of a pile subjected to thermo-mechanical loadings was studied in situ with the aim of quantifying the thermal influence on the bearing capacity of heat exchanger piles. A pile situated in a building under construction was equipped with a chann ...

ASCE2011

Biogrout propagation in soils

Lyesse Laloui

Microbial Induced Calcite Precipitation (MICP) is an innovative technique for soil grouting in which injected bacteria supplemented with chemicals lead to calcite precipitation in soils. A comprehensive research work is carried out to better understand and ...

Springer-Verlag2011

Geotechnical analysis of heat exchanger piles

Lyesse Laloui, Christoph Knellwolf, Hervé Péron

There is currently a lack of established calculation method for the geotechnical design of heat exchanger piles, although the technology is experiencing a fast expansion. Instead of quantifying the effects of temperature changes on the static behavior of h ...

American Society of Civil Engineers2011

A multi-scale multi-physics model of soil drying

Lyesse Laloui, Hervé Péron

Drying shrinkage is modeled at a microscale as a two-stage process of deformation and evacuation of a two-tube vessel system, based on porosimetry evolution. In the first stage water flow is driven by an external evaporation flux. Flow is associated with a ...

ASCE2011

Modelling of biogrout propagation in soils

Lyesse Laloui

Bacterial strains producing urease can have a major impact on the natural calcite precipitation process if they are supplied with nutrients and urea. In Microbial Induced Calcite Precipitation (MICP) process, the precipitated calcite acts as a cementing ag ...

International Center for Computational Engineering (IC2E)2011

Coupled Hydrogeological and Geomechanical Modelling for the Analysis of Slowly-Moving Landslides

Lyesse Laloui, Alessio Ferrari

Slow movements of natural slopes are quite frequent in mountainous or hilly areas. They may display occasional crises, mostly related to the increase of pore water pressures induced by exceptional climatic conditions. A methodology consisting of combining ...

ASCE2011

An Innovative Device for Determining the Soil Water Retention Curve Under High Suction at Different Temperatures

Lyesse Laloui, Simon Salager, Marta Rizzi

In order to characterize the water retention behavior of fine soils, very high suction values have to be applied. In this range of values, the vapor equilibrium technique is usually used. This paper presents an innovative device, a sorption bench, which pe ...

Springer Verlag2011

Thermal variability of the internal friction in clay in a cylindrical thermo-mechanical problem

Lyesse Laloui, Bertrand François

Variability of the internal friction angle with temperature is studied in a boundary value problem numerically simulating the impact of a cylindrical heat source on the stress and strain in soil mass in which it is emplaced. Even if the thermal increase of ...

International Center for Computational Engineering (IC2E)2011

A Bio-hydro-mechanical Model for Propagation of Biogrout in Soils

Lyesse Laloui

Conventional soil improvement techniques can lead to permanent soil pollution or emission of carbon dioxide. It is therefore a challenge for engineers to design alternative sustainable and cost-effective grouting techniques. In Microbial Induced Calcite Pr ...

ASCE2011

Temperature-dependent internal friction of clay in a cylindrical heat source problem

Lyesse Laloui, Bertrand François

The effect of the temperature dependence of the internal friction angle is studied in a boundary value problem simulating the impact of a cylindrical heat source on the soil mass in which it is embedded. This follows a previous study which shows that such ...

2011

Modeling the Onset of Shallow Landslides in Partially Saturated Slopes Subjected to Rain Infiltration

Lyesse Laloui, John Eichenberger, Mathieu Nuth

Heavy rainfall can lead to shallow slips on slopes which are often initially in a state of partial water saturation. A multiphysics approach and advanced constitutive modeling are necessary to take into account the physical key processes in partially satur ...

ASCE2011

Benchmarking of constitutive models for unsaturated soils

Lyesse Laloui, Mathieu Nuth

The paper presents a collaborative piece of research undertaken by seven research teams from different universities within the ‘Mechanics of Unsaturated Soils for Engineering’ (MUSE) network. The objective is to benchmark different approaches to constituti ...

2011

Hydromechanically coupled analysis of transient phenomena in a rainfall-induced landslide

Lyesse Laloui, John Eichenberger, Mathieu Nuth

Heavy rainfall can lead to shallow slips in slopes that are initially in a state of partial water saturation. Multiphysics numerical modelling approaches taking into account the involved physical key processes in variably saturated soils during rainfall ev ...

International Center for Computational Engineering (IC2E)2011

A method for the geotechnical design of heat exchanger piles

Lyesse Laloui, Christoph Knellwolf, Hervé Péron

There is currently a lack of established calculation method for the geotechnical design of heat exchanger piles. Thermo-mechanical effects are ignored and large overall security factors are therefore applied. This paper presents a new geotechnical numerica ...

ASCE2011

Understanding the Thermo-Mechanical Behaviour of Energy Piles

Lyesse Laloui, Alice Di Donna

The heating and cooling of buildings worldwide represent a large amount of the energy needs and are one of the significant sources of CO2. Decreasing the environmental impact of residential and office buildings is of crucial interest. Energy geostructures ...

2011

Modelling of drying and cracking initiation in a gallery excavated in shale

Lyesse Laloui, John Eichenberger, Hervé Péron, Simon Salager

Damage induced by desiccation (i.e. drying shrinkage and cracking) is an issue to be investigated in deep geological nuclear waste storage engineering. A dried and cracked zone can form in the underground gallery host shale due to ventilation effects. Incr ...

CRC Press2010

Drying shrinkage and cracking initiation in clays: Main modeling concepts and application to the ventilation of a tunnel

Lyesse Laloui, John Eichenberger, Hervé Péron

Damage induced by desiccation in clays (i.e. drying shrinkage and cracking) is an issue to be investigated in geo-environmental engineering, especially when the clay is used as a confining barrier for industrial and nuclear waste storage. Dramatic increase ...

Taylor & Francis Group2010

Experimental analysis of the cyclic behaviour of Kaolin at high temperature

Lyesse Laloui, Cane Cekerevac

This paper presents the results of an experimental study related to the thermal effects on kaolin clay cyclic mobility. The thermal effects were identified by comparing the experimental results of cyclic triaxial tests performed at high temperature (90 C) ...

2010

Structural characterization of unsaturated aggregated soil

Lyesse Laloui, Laurent Vulliet, Azad Koliji

Despite the recent experimental studies of soil structure, a comprehensive understanding of the macroscopic response of a soil in relation to its structure has not yet been achieved. This lack of understanding reveals the need for further assessments of so ...

2010

An oedometer for studying combined effects of temperature and suction on soils

Lyesse Laloui, Bertrand François

This paper reports the development of an advanced thermo-hydro-mechanical (THM) oedometer in order to characterize the behavior of soils under combined non-isothermal and unsaturated conditions. The simultaneous control of temperature, suction and stress s ...

ASTM International2010

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