The course of Marine Geotechnics aims to provide students with the basic knowledge on the mechanical and hydraulic behavior of soils and the theoretical foundations of the main methods used in engineering practice, for the design and verification of typical coastal engineering structures (quay and pier foundations, protection works) and offshore.
Marine Geotechnics is a teaching characterizing the Master of science in Sustainable coastal and ocean engineering that aims to form a professional profile of engineer mainly oriented to the fields of structural engineering, transport infrastructures and energy production in coastal and ocean environment. This engineer profile will be able to carry out design, construction, management, control and maintenance of the aforementioned works.
The course will cover the basic topics of land mechanics, such as: the constitution of the land, its multiphase nature, the principle of effective stresses, the seepage flows and experimental tests for the determination of physical and mechanical parameters. In addition, knowledge will be provided of some analytical methods for calculating the thrust of land on the support works and for calculating the limit load and failure of the foundation structures.
At the end of the course students will be able to interpret the results of the main laboratory geotechnical tests, perform basic geotechnical calculations for the dimensioning of the support and foundation structures and evaluate the displacements induced by applied loads, by variations in pore pressures and by the action of wind and waves.
Marine Geotechnics is a teaching characterizing the Master of science in Sustainable coastal and ocean engineering that aims to form a professional profile of engineer mainly oriented to the fields of structural engineering, transport infrastructures and energy production in coastal and ocean environment. This engineer profile will be able to carry out design, construction, management, control and maintenance of the aforementioned works.
The course will cover the basic topics of land mechanics, such as: the constitution of the land, its multiphase nature, the principle of effective stresses, the seepage flows and experimental tests for the determination of physical and mechanical parameters. In addition, knowledge will be provided of some analytical methods for calculating the thrust of land on the support works and for calculating the limit load and failure of the foundation structures.
At the end of the course students will be able to interpret the results of the main laboratory geotechnical tests, perform basic geotechnical calculations for the dimensioning of the support and foundation structures and evaluate the displacements induced by applied loads, by variations in pore pressures and by the action of wind and waves.
scheda docente
materiale didattico
1. Characteristics of soils
• origin of natural soils, marine and continental environment
• identification and classification of soils
2. Porous continuous medium model
• review on stress analysis, Mohr circle
• review on strain analysis, volume change and distortion
• principle of effective stresses
• equations of equilibrium and compatibility
3. Distribution of pore pressures and stress in the soil
• hydrostatic conditions, capillary rise
• seepage in soils (1D conditions only)
• tests for permeability measurement
• lithostatic stress state
4. Models of elastic and plastic material
• linear elasticity; drained and not drained conditions; ideal sampling
• elements of plasticity theory (1D conditions only)
• viscosity
5. Compressibility of soils
• mechanical laboratory tests
• edometric compression test
• analysis of the consolidation process
6. Deformability and resistance of soils
• mechanical behaviour of soils under drained and undrained conditions
• TD direct shear test; TX-CID drained triaxial tests
• criteria for shear strength, critical state, undrained shear strength
• TX-UU, TX-CIU undrained triaxial tests
• notes on soil behaviour under cyclic load (wave action)
• in-situ geotechnical tests in marine environment; SPT and CPT penetration test, VT vane test
7. Introduction to analysis and design of geotechnical structures
• foundation structures, stress induced by foundation loads
• calculation of foundation settlements in coarse and fine grain soils
• calculation of soil pressure (active and passive yield conditions, Rankine)
• earth retaining structures, caissons, embankments, retaining walls
• limit equilibrium methods (Coulomb)
• limit analysis methods
• bearing capacity of pad foundations and piles
- Geotechnical engineering – Lancellotta, Ed. Balkema
- Offshore geotechnical engineering - Randolph et al., CRC Press
Fruizione: 20802027 GEOTECNICA I in Ingegneria civile L-7 N0 GRAZIANI ALESSANDRO
Programma
Introduction to the course1. Characteristics of soils
• origin of natural soils, marine and continental environment
• identification and classification of soils
2. Porous continuous medium model
• review on stress analysis, Mohr circle
• review on strain analysis, volume change and distortion
• principle of effective stresses
• equations of equilibrium and compatibility
3. Distribution of pore pressures and stress in the soil
• hydrostatic conditions, capillary rise
• seepage in soils (1D conditions only)
• tests for permeability measurement
• lithostatic stress state
4. Models of elastic and plastic material
• linear elasticity; drained and not drained conditions; ideal sampling
• elements of plasticity theory (1D conditions only)
• viscosity
5. Compressibility of soils
• mechanical laboratory tests
• edometric compression test
• analysis of the consolidation process
6. Deformability and resistance of soils
• mechanical behaviour of soils under drained and undrained conditions
• TD direct shear test; TX-CID drained triaxial tests
• criteria for shear strength, critical state, undrained shear strength
• TX-UU, TX-CIU undrained triaxial tests
• notes on soil behaviour under cyclic load (wave action)
• in-situ geotechnical tests in marine environment; SPT and CPT penetration test, VT vane test
7. Introduction to analysis and design of geotechnical structures
• foundation structures, stress induced by foundation loads
• calculation of foundation settlements in coarse and fine grain soils
• calculation of soil pressure (active and passive yield conditions, Rankine)
• earth retaining structures, caissons, embankments, retaining walls
• limit equilibrium methods (Coulomb)
• limit analysis methods
• bearing capacity of pad foundations and piles
Testi Adottati
- Lecture notes prepared by the lecturer and further suggested readings.- Geotechnical engineering – Lancellotta, Ed. Balkema
- Offshore geotechnical engineering - Randolph et al., CRC Press
Modalità Erogazione
Lessons, also with video presentations.Modalità Valutazione
Tutorials during the course and review of worked tutorials. Final test by written oral discussion, also including the presentation of worked tutorials.