09 - consolidation rate - the university of memphis for students/09... · 2019-02-13 ·...

Consolidation Rate

(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

'

'v = ' zuss = w z

w– sat

v = (' + wz = sat z

SAND

CLAY

SAND

'v = ' zuss = w z

–

v = (' + wz = sat z

SAND

CLAY

SAND

p p

ue = p

(Lambe & Whitman, Soil Mechanics, 1969)

(Lambe & Whitman, Soil Mechanics, 1969)

(Lambe & Whitman, Soil Mechanics, 1969)

(Lambe & Whitman, Soil Mechanics, 1969)

(Lambe & Whitman, Soil Mechanics, 1969)

(after Lambe & Whitman, Soil Mechanics, 1969)

3.6Time (years)

2.13

Settl

emen

t (fe

et)

(Lambe & Whitman, Soil Mechanics, 1969)

(Lambe & Whitman, Soil Mechanics, 1969)

(Lambe & Whitman, Soil Mechanics, 1969)

(Lambe & Whitman, Soil Mechanics, 1969)

0 t1 Time

Load

1For 0 t t

v2

dr

cT t 2H

avg c1

ts U st

1For t t

v1 2

dr

cT t t 2H

avg cs U s

(after Lambe & Whitman, Soil Mechanics, 1969)

3.6Time (years)

2.13

Settl

emen

t (fe

et)

13 mo.6.5 mo. 26 mo. 39 mo.

t10