The course aims to make you acquire and know:
knowledge of soil mechanics and slope stability
Part I_Mechanics of the rocks
Introduction to the course; illustration of teaching organization; examination procedure.
Introduction to rock mechanics and main fields of application.
Notes on the genesis of stone rocks. Igneous, metamorphic and sedimentary rocks and their diffusion.
Definition of intact rock, discontinuity and rock mass. Continuous and discontinuous medium, scale effect.
Geomechanical survey of rock masses according to ISRM, data acquisition and processing.
Stereographic projections. Use of dedicated software.
Geomechanical classification of rock masses: Bieniawski, Barton, Romana and GSI
Kinematic analysis according to the Hoek and Bray 1981 models.
Stability analysis using the Markland test
Fragile behavior and plastic behavior. Rocks with fragile behavior: stable, unstable fracture, failure and rupture in conditions of uniaxial and triaxial stress
Cracking criterion for intact Hoek and Brown rock The parameters of shear strength m and s.
Measurement of physical and mechanical parameters of intact rock. Density; Real and apparent volume mass; total and effective porosity; Tilt Test; Uniaxial compression tests; Triaxial compression tests; Brazilian traction tests; Bending test; Measurement of deformations.
Resistance to cutting discontinuities: laboratory experimentation, cutting box for stone rocks. Patton's bilinear envelope. Equation of shear resistance of a rough discontinuity according to Barton. Definition of the parameters JCS, JRC and f. Scale effects. Measurement and evaluation methods
Calculation of the safety factor according to the limit equilibrium method for planar, wedge and overturning slips
Part II_ Landslide Risks Hydrogeological risk in Italy and legislation
Definition of landslide risk and assessment methods
Classification of landslides I.A.E.G. 1990
Types of landslides according to Varnes 1978
Classification according to Cruden and Varnes, 1996
Definition of the shape and extent of landslides
Study of a landslide: program of investigations and tests in situ and in the laboratory
Example of a metric calculation
frontal lectures and practical execitations
introduction to the course in geomechanics, definition and applications. Definition of rock mass, intact rock and discontinuity. Scale effect and continuous and discontinuous medium. Application examples. 1,4,6,7
Geomechanical survey, example of execution and objective. Review of rock categories. ISRM recommendations: spacing, persistence, roughness, opening, filling, hydraulic conditions, single-axis resistance with sclerometer, RQD, unit rock volume, spacing frequency, Jv, Jb. 1,6,8
Geomechanical classification, introduction and objectives: Bieniawski 1989. Geomechanical classification: Barton, Romana, GSI. 4.6
Hoek classification and application of the Hoek and Brown rupture criterion Breaking criterion for Hoek and Brown intact rock The parameters of shear strength m and s. 1,4,7
Kinematic analysis, mechanisms according to Hoek and Bray. identification of main sets, and creation of critical areas for rollover, planar and wedge sliding through software. Stability analysis using the Markland Test 1.5
Calculation of the safety factor according to the limit equilibrium method for planar, wedge and overturning slips 1,4
Fragile behavior and plastic behavior. The rocks with fragile behavior: stable, unstable fracture, failure and rupture in conditions of monoaxial and triaxial stress 4, 6
Physical-mechanical characterization of intact rock: Physical tests according to UNIEN: apparent and real density; total and open porosity; specific weight. Measurement of deformation and resistance parameters of intact rock. Monaxial compression tests with the press; Point Load Test. 1,4,6,7
Triaxial compression tests; Traction tests Brazilian; Bending test. Measurement of deformations. Tilt test Resistance to cutting discontinuities, linear and curvilinear breaking criterion: laboratory experimentation, cutting box (Hoek box) for stone rocks. Patton's bilinear envelope. Equation of shear resistance of a rough discontinuity according to Barton. Definition of JCS, JRC parameters. 1,4,6,7
Introduction to the second part of the discipline. Hydrogeological risk in Italy and legislation. Hydrogeological planning plan, PAI. Definition of landslide risk and assessment methods 2,3,5,9
Classification of landslides I.A.E.G. 1990 Types of landslides according to Varnes 1978: collapses, overturns, lateral expansions, rotational flows, planar, poured, complex slips. Classification according to Cruden and Varnes, 1996 2,
soil structure and soil properties, stress in the soil; the water in the soil, seepage in porous media, consolidation theory; compressibility end shear strength of soil. Landslides classification; method of analysis for slope stability; concept of fsctor of safety of a slope; Seismic loading.
Renato Lancellotta : "GEOTECNICA" . Zanichelli