Soil Mechanics Jan Záleský, PhD. Department of Geotechnics Office: B 506 Office Hours: Tuesday: 09:00 – 09:50 Friday: 09:00 – 09:50 Phone: 224 354 551, Fax: 233 334 206 Handy: +420 602 316 383 E-mail: [email protected]
Soil Mechanics
Jan Záleský, PhD.Department of Geotechnics
Office: B 506 Office Hours: Tuesday: 09:00 – 09:50
Friday: 09:00 – 09:50Phone: 224 354 551, Fax: 233 334 206
Handy: +420 602 316 383E-mail: [email protected]
Geomechanics / Geotechnics(Science and Application, Technology)
• Soil Mechanics– soil description & testing, behaviour, prognosis, etc.
• Rock Mechanics– rock description & testing, behaviour, prognosis, etc.
• Foundation Engineering– spread / pile footing, foundation pit design, etc.
• Underground openings– tunnels, caverns, etc.
• Monitoring– verification of assumptions being stated at design stage,– in-situ (scale 1:1) - structure & soil/rock mass behaviour,– basic step in application of Observational Method.
Fondations:From Geology to Soil Mechanics
SoilMechanics:
Theory,
testing,
application,
Knowledge,
experience,
t h l
Failure modes of strip footing
(a) General shear, (b) local shear, (c) punching shear in: dense / stiff soil high compressible soils (HCS) HCS / considerable depth.
General slip surface0.
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Gabion Wall Gravel Stabilizing Berm Road
Soil
• Where does it come from?– Weathering of earth crust (mechanical,
chemical)• residual soils / not transported• sedimented soils / transported
– Sediments» eluvial, fluvial, deluvial, glacial, eolic, limnic, marine,
antropogenic
• Terrestrial / extra-terrestrial ?
Soil• Composition & Description
– phases: fluid / liquid / solid• History
– virgin:• normally consolidated / over-consolidated
– made ground• Characterisation and testing
– strength– deformation
Solids - fine grains
• Clay structures – (a) dispersed, (b) flocculated, (c) book-house,
(d) turbostatic, (e) example of natural clay