Teacher
prof. Roberto MERIGGI
Credits
6 CFU
Objectives
The aim of the course is to illustrate the main principles of soil mechanics an soil hydraulic and allow the students to know and use the methods to study water seepage in the soil and its interaction with hydraulic structures,to compute soil settlement due to consolidation phenomena, to know and use the methods to measure soil shear stength and deformability by laboratory and in situ tests.
Acquired skills
- To measure and use soil classification sistems
- To use a flow net and analyses seepage trough a geotechnical structure.
- To compute the stress state in the soil in hydrostatic and hydrodinamic conditions
- To compute the consolidation settlements and their temporal occurrance
- To know the principles of soil shear strength and the laboratory methods for its measurement.
- To know the purposes of in situ investigation and the main methods of in situ testing
Contents
Soil index properties: Basic physical properties of soil and their measurement.Soil classification sistems. Permeability. (8 hours)
Stress in soil: Effective stress principle. Stress history. Normally consolidated and overconsolidated soils, Stresses distribution in soil. Boussinesq's theory. (10 hours)
Seepage and flow net theory: Flow net construction, confined and unconfined seepage, Control of piping and bottom uplift. (8 hours)
Soil consolidation: Terzaghi's monodimensional consolidation theory. Oedometric tests and measurement of compression and consolidation coefficients. Radial consolidation e vertical drains. (10 hours)
Constitutive models and stress paths: Elastic, elastoplastic and viscous models, Stress paths in the planes s, t and p, q. (4 hours)
Soil shear strength: Shear strength of granular and cohesive soils. Critical state concept. Triaxial tests: CID, CIU, UIU. Shear box tests and residual strength of cohesive soil. (12 hours)
Soil Investigation: Scope and purpose of site investigation, core drilling, methods of sampling. In situ testing: SPT,FVT, Dilatometer,Cone penetration tests and dilatometer tests. (8 hours)
References
- Colombo P., Colleselli F. Elementi di geotecnica. Edizioni Zanichelli
- Lancellotta R., Geotecnica. Edizioni Zanichelli
- Berardi R. Fondamenti di Geotecnica. Città studi edizioni
- pdf copies of lesson slides
Additional material or information on line http://http://materialedidattico.uniud.it.
Type of exam
Written and oral
