Geoscience Reference
In-Depth Information
10
Miyakawa (1960)
1
9
8
7
6
5
1
Skemoton & Petley
(1970)
Topical peat
3
2
2
3
4
3
2
1
0
0
100
200
300 400
Liquid Limit %
500
600
700
Figure 5.8
Liquid limit vs. void ratio (
after
Al-Raziqi
et al
., 2003).
7
Betuwe railroad
Welsh bog
Cheshire poor fen
Norfolk buried peat
Bintulu peat
6
5
4
3
2
1
0
0
1
2
3
4
5
W
O
(%)
Figure 5.9
Initial water content vs. void ratio for Dutch peat (
after
den Haan, 1997).
Figure 5.9 shows the graph of initial void ratio (
e
o
) and natural water content (
w
o
)
for Dutch peat. The best-fit line in the above figure is expressed by:
30
.
65
(
w
o
+
0
.
88)
0
.
116
1
.
12
e
o
=
−
30
(5.4)
As for the liquid limit, the void ratio increases with increasing natural water content.
Hobbs (1986) found that despite the large variations that occur within peat, the
variation in the ratio of
c
c
/(1
+
e
o
) is relatively small. This is shown in Figure 5.10.
