analysis and design of geotechnical structures and
TRANSCRIPT
Analysis and Design of Geotechnical Structures and Earthworks (6 CFU) – I semester
Prof. Monica Barbero
Monica Barbero – Analysis and design of geotechnical structures and earthworks 2
Main aims
• Providing the necessary tools to assess the safety of new and existing geotechnical works with the aim to
mitigate the risk for people, facilities and infrastructure because of geotechnical problems
• Giving the ability of analyzing a geotechnical problem, identifying the engineering solution and designing it,
by means of analytic and numerical tools
• Providing the basis for the design of geotechnical works in all its stages, starting from the site
characterization to the work execution
• Teaching to produce a complete and rigorous technical report
These objectives will be achieved by LECTURES and TUTORIALS
Main contents
• Basics of rock mechanics (for students who did not attend Rock Mechanics course)
• Geotechnical surveys and in situ tests
• Analysis of the stability of soil and rock natural slopes and excavations
• Geotechnical works for mitigating the risk due to soil and rock instability problems
• Earth works and design procedures
Overview
Monica Barbero – Analysis and design of geotechnical structures and earthworks 3
Geotechnical surveys and in situ tests
Monica Barbero – Analysis and design of geotechnical structures and earthworks 4
• Analysis of the stability of soil and rock
natural slopes and excavations
• Soil-structure interaction
Stability analyses
Monica Barbero – Analysis and design of geotechnical structures and earthworks 5
Soil and rock slopes stabilization systems
(anchorages, bars);
Defence works (rockfall barriers,
rockfall nets, rockfall embankments
Geotechnical works for mitigating the risk due to soil and rock instabilities
Monica Barbero – Analysis and design of geotechnical structures and earthworks 6
(from Keller website)
Micro drains, draining wells
Ground improvement techniques
(Bell, 1987)
jet grouting, soil nailing
Monica Barbero – Analysis and design of geotechnical structures and earthworks 7
GabionsReinforced soil structures
Earth works and design procedures
Retaining structures
Monica Barbero – Analysis and design of geotechnical structures and earthworks 8
One way formwork (electrically
welded mesh)
Soft soil
Geogrid
Filling compacted soil
Hook for the formwork hardening
Anti erosion coat
Geomats
Reinforced soil embankments
Monica Barbero – Analysis and design of geotechnical structures and earthworks 9
Identification of danger
Hazard analysis H
Spatial probability of
occurrence
Magnitude
Time probability of
occurrence
Consequences analysis D
Element at risk
Vulnerability of element at
risk(V)
Worth and exposure of
element at risk (W and Es)
D = V x Es x W
R = H x D
Risk assessment procedure
Monica Barbero – Analysis and design of geotechnical structures and earthworks 10
• Rockfall analysis and design of a defence work
• Stability analysis of a rock volume and design of
a stabilization system
Project - Example
Monica Barbero – Analysis and design of geotechnical structures and earthworks 11
Design of a reinforced soil embankments
Project - Example
