Environmental Engineering Reference
In-Depth Information
100
a
90
0.02
0.05
0.1
0.15
0.05
0.1
0.15
0.2
80
Unimodal
(two bending
points)
y
aev
= 2 kPa
y
res
= 10 kPa
S
res
= 0.1
70
60
50
40
Unimodal (one
bending point)
y
aev
= 1000 kPa
30
20
10
0
10
6
0.1
1
10
100
1000
10,000
100,000
Soil suction, kPa
Figure 5.63
Effect of changing
a
variable on unimodal curves (after Gitirana and Fredlund,
2004).
100
Unimodal (one
bending point)
a
= 0.1
90
80
70
60
y
b
50
Unimodal
(two bending
points)
a
= 0.05
y
res
= 40 kPa
S
res
= 0.1
1 kPa
2 kPa
5 kPa
10 kPa
100 kPa
400 kPa
2000 kPa
10000 kPa
40
30
20
10
0
10
6
0.1
1
10
100
1000
10,000
100,000
Soil suction, kPa
Figure 5.64
Effect of changing
ψ
b
variable on unimodal SWCC curves (after Gitirana and
Fredlund, 2004).
100
90
ψ
res
8 kPa
20 kPa
40 kPa
100 kPa
80
a
= 0.05
y
aev
= 5 kPa
S
res
= 0.1
70
60
S
res
50
0.1
0.2
0.3
0.4
40
30
a
= 0.05
y
aev
= 2 kPa
y
res
= 10 kPa
20
10
0
0.1
1
10
100
1000
10000
100000
1000000
Soil suction, kPa
Figure 5.65
Effect of changing
ψ
res
and
S
res
variables on unimodal SWCC curve with two
bending points (after Gitirana and Fredlund, 2004).
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