The document discusses geotechnical engineering concepts related to settlement calculations and consolidation tests, specifically focusing on the relationship between pressure and deformation. It includes formulas and coefficients used to evaluate compressibility and volume change in soil. Additionally, reference materials are provided for further reading on these topics.

1. 1
Geotechnical Engineering–II [CE-321]
BSc Civil Engineering – 5th Semester
by
Dr. Muhammad Irfan
Assistant Professor
Civil Engg. Dept. – UET Lahore
Email: mirfan1@msn.com
Lecture Handouts: https://groups.google.com/d/forum/geotech-ii_2015session
Lecture # 12
13-Oct-2017

2. 2
MAGNITUDE OF SETTLEMENT
CALCULATION
Consolidation Settlement

3. 3
CONSOLIDATION TEST
Pressure ~ Deformation Curve
p
e
aV



e ~ p plot
e
p
Δe
Δp
aV = coefficient of compressibility
Cc = compression index
mV = coefficient of volume change
Δe
log (p2/p1)
e
log p
1
2log
p
p
e
CC


e ~ log p
plot
e
a
m V
V


1
Strain
p
Δe
Δp
p
mV



e
e ~ p plot

4. 4
CONSOLIDATION – SUMMARY
H
e
e
Ssettlement
o
c



1
 = ’ + u





 

VC
HT
t
2
%60;
1004
2






 ufor
u
T

%60
);100(log933.0781.1 10


ufor
uT
AG
W
H
wS
S
S


 S
SwS
W
WAGH
e


)(
0

1
2log
p
p
e
CC


 





HHVV
mV





 








'
''
log
1 vo
vo
o
c
c
e
C
HS







 








'
''
log
1 vo
vo
o
r
c
e
C
HS

 






 





















'
''
log
1'
'
log
1 p
vo
o
c
vo
p
o
r
c
e
C
H
e
C
HS




For NCC
For OCC
If OCC is loaded beyond σp’
)10(009.0  LLCC Cr CC  1.0
Terzaghi & Peck (1948)

5. 5
Practice Problem #1

6. 6
CONCLUDED
REFERENCE MATERIAL
An Introduction to Geotechnical Engineering (2nd Ed.)
Robert D. Holtz & William D. Kovacs
Chapter #8 & 9