Geomechanics
Summary
The course aims at providing future civil engineers with the knowledge of geomechanics for professional practice. It addresses, among others, the main stress-strain constitutive models within the context of elasticity and elasto-plasticity and the estimation methods of the lateral earth pressure.
Content
- Engineering applications and challenges
- Basic concepts of continuum mechanics and geomechanics
Stress-strain behaviour of geomaterials in drained and undrained conditions
Laboratory tests with special focus on triaxial testing
- In-situ stress state
- Stress-strain constitutive frameworks
- Elasticity
Linear and non-linear elasticity
Applications of elastic models
- Plasticity
Plasticity principle and yield criteria for geomaterials
Critical state concept
Elasto-plastic stress-strain constitutive frameworks (among other Modified Cam Clay model)
- Time dependent behaviour of geomaterials
Real cases and time-dependent phenomena
Viscous deformations: basic concepts and experimental evidences
Visco-elasto plastic models
- Behaviour of unsaturated geomaterials
Basic concepts
Hydraulic and mechanical behaviour
Effective stress definition for unsaturated geomaterials
- Retaining structures in saturated and unsaturated geomaterials
Lateral earth pressure for saturated and unsaturated soils (Rankine¿s theory)
Shear strength of unsaturated geomaterials
Darcy¿s law for saturated and unsaturated geomaterials
- Thermo-mechanics and soil dynamics
Mechanical behaviour of soils in non-isothermal conditions
Mechanical behaviour of soils under dynamic loads
- Advanced topics in geomechanics
Energy related applications
Bio-improved soils
- Series of workshop with professionals in geomechanics and geotechnical engineering
Keywords
Mechanical behaviour of geomaterial, Constitutive models, elasto-plasticity, numerical modelling in geomechanics, laboratory and in-situ testing
Learning Prerequisites
Required courses
Soil mechanics and groundwater seepage
Learning Outcomes
By the end of the course, the student must be able to:
- Recognize the stress path(s) to which the soil is subjected in the context of the engineering application of interest
- Use methods for evaluating the in-situ stress state
- Recognize the most suitable constitutive model for the problem of interest in relation to the soil and the problem itself
- Judge capabilities and limitations of constitutive models
- Assess / Evaluate Evaluate the geotechnical parameters governing the geomechanical problem
- Choose the correct laboratory or in-situ tests for the determination of the needed parameters
- Interpret the experimental data resulting from a laboratory campaign in order to obtain the parameters of interest
- Assess / Evaluate the lateral earth pressure under different hydraulic conditions
- Use consciously a finite element software for creating a geomechanical model appropriate for the problem of interest
Transversal skills
- Set objectives and design an action plan to reach those objectives.
- Use a work methodology appropriate to the task.
- Communicate effectively with professionals from other disciplines.
- Demonstrate the capacity for critical thinking
- Use both general and domain specific IT resources and tools
- Access and evaluate appropriate sources of information.
Teaching methods
- Ex cathedra and exercices
Assessment methods
Final exam (written): 60% of the final mark
Mid-term exam (written): 20% of the final mark
Continuous assessment (workshops and projects): 20% of the final mark
Supervision
Office hours | No |
Assistants | Yes |
Forum | No |
Resources
Bibliography
Lectures notes and handouts given during the course
Moodle Link
Dans les plans d'études
- Semestre: Automne
- Forme de l'examen: Ecrit (session d'hiver)
- Matière examinée: Geomechanics
- Cours: 2 Heure(s) hebdo x 14 semaines
- Exercices: 2 Heure(s) hebdo x 14 semaines
- Semestre: Automne
- Forme de l'examen: Ecrit (session d'hiver)
- Matière examinée: Geomechanics
- Cours: 2 Heure(s) hebdo x 14 semaines
- Exercices: 2 Heure(s) hebdo x 14 semaines
- Forme de l'examen: Ecrit (session d'hiver)
- Matière examinée: Geomechanics
- Cours: 2 Heure(s) hebdo x 14 semaines
- Exercices: 2 Heure(s) hebdo x 14 semaines