Environmental Engineering Reference
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100
90
h = 1.2 m
80
h = 2.2 m
h = 3.5 m
h = 4.9 m
70
60
50
40
30
20
10
0
1
10
100
Equivalent diameter (µm)
Figure 6.6. Grain size distribution curves of the four samples
Depth
(m)
Horizon
ρ s
(Mg/m 3 )
%
<2µm
w L
(%)
w p
(%)
I p
ρ d
(Mg/m 3 )
w Nat
(%)
S rNat
(%)
%
Ca
Suction
(kPa)
1.2
3
2.719
20
30
21
9
1.52
18.9
66
10
20
2.2
6
2.714
16
28
22
6
1.39
18.1
53
12
34
3.5
7
2.713
16
26
20
6
1.54
16.6
55
11
27
4.9
10
2.712
18
30
21
9
1.55
23.7
82
16
14
Table 6.1. Geotechnical properties of the four samples
Table 6.1 presents the geotechnical characteristics of the profile, including the
degree of saturation S r and the in situ suction measured using the filter paper method
[FAW 67].
It is observed that:
- the solid unit mass ρ s is almost the same at all depths;
- the values of plasticity index I p are quite small, ranging from 6 to 9;
- the dry unit mass ρ d is also low, varying from 1.39 to 1.55 Mg/m 3 ;
- the values of degree of saturation S r are low (less than 66%) in samples at
1.2, 2.2 and 3.5 m;
- the carbonate content is higher than 10%, reaching 16% for the sample at
4.9 m;
- suction is small in all samples between 14 and 34 kPa.
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