Rocks Mechanics
Instance: 2004/2005 - 1S
Cycles of Study/Courses
Teaching language
Portuguese
Objectives
Knowledge about the typical behavior of rock masses. Presentation and discussion of civil engineering solutions related to geotechnical works in rock masses, likely slopes and foundations of geotechnical structures in rock mass formations. Presentation of the methodologies for safety analysis and design. In situ state of stress evaluation. Study of seepage through fractured rock masses and the influence of the in situ state of stress. Issues related to the variability of the geomechanical parameters and geotechnical risk. Rock slopes. Rock mass foundations.
Program
Introduction. Physics of the rocks. Mechanical behavior of the rocks. Testing mechanical rock properties. Deformability and strength criteria. Anisotropy of rocks and rock masses. Structural description of the rock masses. Mechanical behavior of rock masses. Description and characterization of rock masses.
Discontinuities. Geometrical characterization. Roughness and aperture. Discontinuities sets. Shear strength of planar and roughness discontinuities. Barton’s law. Laboratory and in situ tests.
Empirical rock mass classification systems. System RMR. System Q and subsystem QTBM. System GSI. System MR. Application of empirical systems to practical situations.
In situ stress characterization. Total stress relief techniques. Partial stress relief techniques. Hydro-fracturing techniques. Other techniques.
Water seepage through fractured rock masses. Practical problems involving seepage. Study of the seepage. In situ hydraulic characterization. Modeling of the phenomena. Numerical modeling. Hydraulic behavior of concrete dam foundations. Hydromechanical characterization of rock masses. Hydromechanical idealizations.
State of stress and of deformation. Numerical modeling. Conceptual behavior models. Hoek-Brown strength criterion. Importance of monitoring.
Variability of the geotechnical parameters. Safety factor and variability of the rock mass parameters.
Rock slopes. Types of landslides and its modeling. Safety and variability. Monte Carlo techniques and Harr crossed simulation. Stability and stabilization. Construction solutions.
Rock foundations. Design of rock foundations and in weathered rock masses. Stabilization techniques. Efficiency level expected.
Mandatory literature
Textos de apoio cedidos à Comissão de Curso pelos Professores A. Campos e Matos e L. Ribeiro e Sousa.
Evert Hoek; Practical Rock Engineering
F. Descoeudres, Lausanne; Mécanique des Roches
T. Miranda; Contribuição para a obtenção de parâmetros geomecânicos para a modelação de obras subterrâneas em maciços graníticos
Hoek, Evert;
Rock Slope Engineering. ISBN: 0-900488-21-2
Rocha, Jaime;
Eléctrico e electrónico
Software
Rocscience software
Evaluation Type
Evaluation with final exam