Lyesse Laloui

Lyesse Laloui, Alessio Ferrari

This paper presents the results of a comprehensive experimental study of the desiccation of fine-grained soils. Air-drying of initially saturated soil slabs in controlled conditions is investigated, by performing three kinds of tests: free desiccation test ...

2009

Geomechanical modelling of a natural slope affected by a multiple slip surface failure mechanism

This paper presents a geomechanical model that was developed to investigate the behaviour of a natural slope located on the bank of the Rhine between the towns of Stein and Mumpf in Switzerland. The slope, affected by a large landslide, constitutes a relev ...

INTERNATIONAL CENTRE FOR COMPUTATIONAL ENGINEERING (IC 2E)2009

ACMEG-T: Soil Thermo-Plasticity Model

Lyesse Laloui, Laurent Vulliet, Georg Klubertanz

This paper addresses an advanced and unified thermo-mechanical constitutive model for cohesive soils. Based on experimental evidence showing the non-linear and irreversible thermo-mechanical responses of saturated soils, the constitutive equations of the d ...

2009

Identification of mechanisms for landslide type initiation of debris flows

The modelling of debris flow initiation in slopes is addressed in this paper. First, possible factors governing debris flow initiation are established. Then, a coupled hydro-mechanical model for deformable porous media with two pore fluids that is used to ...

2009

Response to Comment on "On the use of generalised effective stress in the constitutive modelling of unsaturated soils"

Lyesse Laloui, Mathieu Nuth

2009

Implications of thermal sensitivity of the static internal friction angle

Thermal variability of the coefficient of the critical state, or the angle of internal friction is examined in view of experimental results obtained for clays and hard rocks. This sensitivity has several implications for the evolution of what is considered ...

INTERNATIONAL CENTRE FOR COMPUTATIONAL ENGINEERING (IC 2E)2009

Discrete element modelling of drying shrinkage and cracking of soils

This paper is aimed at showing the efficiency of discrete element modelling for the prediction and understanding of drying shrinkage and associated cracking. The discrete element approach used is presented first. Cohesive forces between grains, as well as ...

2009

Behavior of Unsaturated Aggregated Soil in Oedometric Condition

Lyesse Laloui, Alessio Ferrari

Natural and agricultural soils usually possess an aggregated structure; in the sense that they are composed of aggregates and large inter-aggregate pores. Under the natural condition, these soils are usually unsaturated and the large pores are easily drain ...

2009

Hydro-mechanical modelling of a natural slope affected by a multiple slip surface failure mechanism

A coupled hydro-mechanical formulation is presented for the analysis of landslide motion during crisis episodes. The mathematical formulation is used to model a natural slope affected by a multiple slip surface failure mechanism, in which pore water pressu ...

2009

Mechanics and velocity of large landslides

Lyesse Laloui

2009

Numerical Simulation of an In-Situ underground Experiment for Nuclear Waste Storage

2008

Modeling Evaporation, Shrinkage and Cracking of Desiccating Soils

2008

Assessment of structural evolution of aggregated soil using neutron tomography

The advanced non-destructive method of neutron tomography, together with image analysis, is used to evaluate the structural evolution of an aggregated soil during one-dimensional compression tests. Aggregation of primary particles is a commonly observed ph ...

American Geophysical Union2008

ACMEG-TS: A constitutive model for unsaturated soils under non-isothermal conditions

This paper introduces an unconventional constitutive model for soils which deals with a unified thermo-mechanical modelling for unsaturated soils. The relevant temperature and suction effects are studied in light of elasto-plasticity. A generalized effecti ...

2008

New basis for constitutive modelling of unsaturated aggregated soil with structure degradation

CRC Press2008

Finite element modelling of thermo-elasto-plastic water saturated porous materials

The purpose of this paper is to present a new finite element formulation for the hydro-thermo-mechanical analysis of elasto-plastic multiphase materials based on Porous Media Mechanics. To this end, the ACMEG-T thermo-plastic constitutive model for saturat ...

2008

Advanced Constitutive Model for Unsaturated Structured Soil with Double Porosity

2008

Numerical modelling of desiccation cracking of soils