Programa de Doctorat en Enginyeria del Terreny: Envíos recientes
Mostrando ítems 61-80 de 162
A micromechanical study of the Standard Penetration Test
This thesis explores the potential of models based on the discrete element method (DEM) to study dynamic probing of granular materials, considering realistic particle-scale properties. The virtual calibration chamber ...
Upscaling mixing-limited chemical reactions from pore to continuum scale using the dispersive lamella concept
Reactive transport modeling is an important tool for the analysis of coupled physical, chemical, and biological processes in Earth systems. Observed reactive transport in heterogeneous porous media shows a different behavior ...
Imaging and discrete modelling of sand shape
The shape of particles is known to play an important role in soil behaviour, with significant effects of engineering responses. Investigating how the shape of particles can be measured and quantified is therefore considered ...
Modeling capillarity and two-phase flow in granular media: from porescale to network scale
Numerical simulations at the pore scale are a way to study the behavior of multiphase flows encountered in many natural processes and industrial applications. In this work, liquid morphology and capillary action are examined ...
Study of ice content and hydro-mechanical behaviour of frozen soils
The hydro-mechanical behaviour of soils during freezing and thawing is a coupled multi-physics process that has important practical applications. To cite but a few examples, on artificial ground freezing –to provide ...
Support tools for groundwater management in the proximity of a mine site
The natural environment in which we live, is subjected, to a greater or lesser extent, to the pressure of human activity, with water being one of the most sensitive elements. For this reason, aware of this situation, from ...
An approach for hydrogeological data management, integration and analysis
The conceptualisation of a groundwater system involves continuous monitoring and evaluation of a large number of parameters (e.g., hydraulic parameters). Regarding hydraulic properties of the aquifers, their quantification ...
Análisis THM de la interacción suelo-atmósfera en suelos arcillosos sometidos a desecación
Coupled processes between the soil and the atmosphere control soil water evaporation in its first stage, which leads to soil shrinkage and cracking by drying. However, soil-atmosphere interaction has received little attention ...
Insertion problems in geomechanics with the particle finite element method
This thesis develops a numerical technique in which the Particle Finite Element method is applied to simulate solid intrusion problems in Geotechnical Engineering. The thesis describes the numerical development work that ...
Analysis of underground excavations in argillaceous hard soils : weak rocks
Materiales arcillosos rígidos, que se encuentran en la zona de transición entre suelos duros y rocas blandas, están siendo considerados actualmente en varios países como la roca huésped para el almacenamiento geológico ...
Estudio del comportamiento de colapso en arenas arcillosas bajo un estado generalizado de tensiones
This thesis studies the hydro-mechanical behaviour of a compacted clayey sand under generalised stress state. The study, which is mainly experimental, focuses on the analysis of the shear strength at different hydraulic ...
Microbial and geochemical dynamics in soils and their impact on the hydraulic properties : from laboratory experiments to model development
Most of the microorganisms on Earth are found in sophisticated colonies called biofilms. Such microbial communities may proliferate everywhere life can exist as long as nutrients are available and surface attachment is ...
Dinámica y peligrosidad de las corrientes de derrubios : aplicación en el barranco de Erill, Pirineo catalán
Debris flows are one of the most dangerous mass movements in mountainous regions, but with many outstanding issues on hydrological conditions, mechanisms triggering, dynamic flow and mitigation measures. This work in the ...
Rockfall analysis : failure, fragmentation and propagation characterization : a fractal fragmentation of rockfalls
The present thesis aims at the analysis of the fragmentation of rockfalls. The fragmentation is a complex phenomenon poorly understood with a lack of tools to reproduce it on rockfall simulators. The effect of fragmentation ...
Experimental and numerical study of the effect of stress on ASR expansions in concrete
This thesis aims at deepening in the understanding of the mechanisms by which the stress state affects the development of concrete expansions and cracking due to the Alkali-Silica Reaction (ASR). With this purpose, a ...
Mechanism and stochastic dynamics of transport in Darcy-scale heterogeneous porous media
Solute transport in heterogeneous porous media in general exhibits anomalous behaviors, in the sense that it is characterized by features that cannot be explained in terms of traditional models based on the advection-dispersion ...
Long term response of multi-barrier schemes for underground radioactive waste disposal
The main objective of this thesis is to achieve an improved understanding of the thermo-hydro-mechanical processes and material properties that affect how the gaps and canister) behave during and after installation in the ...
Hydro-mechanical behaviour of compacted binary mixtures : an experimental study
This research focusses on an experimental investigation on the hydro-mechanical behaviour of binary ‘all-one’ mixtures. These mixtures –originated from the excavation of selected materials during earthwork constructions– ...
Landslide motion assessment including thermal interaction : an MPM approach
Risk associated with landslides of natural or man-made origin depends on the prediction of the post-failure behaviour of the mobilized mass. Numerical models capable of integrating the landslide geometry and its evolution, ...
Effect of thermal cycles on rock massif stability
The environmental conditions may play a relevant role in the stability of rock slopes. In fact, weathering can contribute to the reduction of strength of the material, while atmospheric actions may increase internal stresses ...
