Soil Mechanics II
Keywords |
Classification |
Keyword |
OFICIAL |
Geotechnics |
Instance: 2008/2009 - 2S
Cycles of Study/Courses
Acronym |
No. of Students |
Study Plan |
Curricular Years |
Credits UCN |
Credits ECTS |
Contact hours |
Total Time |
MIEC |
287 |
Syllabus since 2006/2007 |
4 |
- |
6 |
75 |
160 |
Teaching language
Portuguese
Objectives
Introduction to the concepts, theories and methods used in Civil Engineering for the design of works and structures whose stability relies on the mechanical behaviour of soil masses.
Program
Classical theories of lateral earth pressure. At-rest state of stress. Rankine active and passive states. Strains associated with Rankine states. Active and passive thrusts. Caquot-Kérisel tables. Coulomb theory. Mononobe-Okabe theory to estimate active and passive pressures under seismic conditions.
Design of gravity retaining walls. Modes of failure. Global safety factors. Limit state design and partial safety factors in Geotechnics. Introduction to Eurocode 7 - Geotechnical Design.
Stability of slopes and embankments. Solutions for infinite slopes. Wedge method. Fellenius and simplified Bishop methods. Stability of embankments on soft soils. Methods for the improvement of stability. Stability of cuttings in cohesive soils. Stabilization of natural slopes. The role of observation.
Undisturbed sampling. In situ testing versus laboratory testing. Penetration tests: SPT, CPT, CPTU (piezocone) and dynamic probing. Vane-shear test. Cross-hole seismic test. Plate load test. Self-boring pressuremeter test.
Shallow foundations. Bearing capacity. Theoretical solution and correction factors for shape, inclination of the load and influence of a rigid boundary and account for the eccentricity of the load. Immediate settlement. Elastic solution and semi-empirical corrections. Criteria for evaluating soil deformability modulus for estimating the settlement. Allowable settlement. Effect of soil-structure interaction on the distribution of the loads on the foundations and on the induced settlements.
Teaching methods and learning activities
Lectures for the presentation of the concepts, principles and theories with reference to works, accidents and natural phenomena conditioned by the behaviour of soil masses.
Tutorials for the resolution of numerical applications from the proposed problem sheets.
Use of a computer program for slope stability analyses.
Field trips.
Evaluation Type
Distributed evaluation with final exam
Eligibility for exams
The continuous assessment grading must be at least 9.5/20.
Calculation formula of final grade
The final mark is a weighted average of the continuous assessment and the final exam grades, with weights of 0.25 and 0.75, respectively.
If this result is above 16/20 the student is invited for an oral exam, otherwise the final mark is 16/20.
If the exam is marked below 9.5/20 the student will fail and that will be the final mark.
Examinations or Special Assignments
Home-work exercises included in the proposed problem sheets in complement of the tutorial and practical classes. Application of SLOPEW to the analysis of the stability of an embankment on soft ground.
The total time required by the proposed home-work is estimated in 14 hours.
Special assessment (TE, DA, ...)
In accordance with FEUP assessment regulations.
SPECIAL RULES FOR MOBILITY STUDENTS:
Proficiency in Portuguese and/or English;
Previous attendance of introductory graduate courses in the scientific field addressed in this module;
Evaluation by exam and/or coursework(s) defined in accordance with student profile.
Classification improvement
In accordance with FEUP assessment regulations.
Observations
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Working time estimated out of class: 4 hours