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Transcript of 06 - Consolidation Slides - Civil Engineering for Students/06 - Consolidation... · Consolidation....
Real Soils
• nonlinear – stress is not proportional to strain
• elastoplastic – strain is not fully recovered upon unloading
• viscoelastic – stress-strain response is time dependent
• nonconservative – stress-strain response is history dependent
(Holtz & Kovacs, An Introduction to Geotechnical Engineering, 1981)
Coefficient of volume change∆∆ ′
Figure 8.4a
(Holtz & Kovacs, An Introduction to Geotechnical Engineering, 1981)
Coefficient of compressibility∆∆ ′
Figure 8.4b
freewater
surface
z
Effective stressNeutral stressTotal stress
´ = ´zu = w(z+d) = satz + w(z+d)
lakebed
d
(Holtz & Kovacs, An Introduction to Geotechnical Engineering, 1981)
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CL
CL
ML
CH
SP
CH
Figure 8.9a