Consolidation Real Soils nonlinear stress is not proportional to - PDF document

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

Figure 8.3a (Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

Figure 8.3b (Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

Figure 8.4a Coefficient of volume change � � � ∆� � ∆�′ �� (Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

Constrained Modulus � � ∆�′ � ∆� �� � � M 1 � � (Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

Figure 8.4b Coefficient of compressibility ∆� � � � ∆�′ �� (Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

Figure 8.5a (Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

Figure 8.5b (Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

Total stress Neutral stress Effective stress free water surface d lake bed  =  w d u =  w d  ´ = 

Total stress Neutral stress Effective stress free water surface d lake bed z  =  sat z +  w (z+d) u =  w (z+d)  ´ =  ´z

(Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

(Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

(Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

(Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

Figure 8.8 (Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

(Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

(Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

Figure 8.6 (Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

CL 8 CL 9 Figure 8.9a ML 10 CH 11 SP 12 CH 13 (Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

Figure 8.15a (Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

Figure 8.9c (Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

Figure 8.9d (Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

Figure 8.9h (Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)

Figure 8.9h (Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981)