Geoscience Reference
In-Depth Information
Fig. 17.14. Force-displacement curves fortestswithdry unit weight of
16
7kNm
−
3
and H
.
3-16
.
/
D
=
6
Table 17.1. Summary information for tests with dry unit weight of 16
.
3-16
.
7kNm
−
3
and
H
/
D
=
6
Line symbol
Water
Dry unitweight
Test no.
Friction
N
q
2
(
kN m
−
3
angle
∗
content (%)
)
1
T&O
∗∗
0
16.4
36
9.8
46
0 16.7 25 37.1-37.8 12.2
4.1 16.4 21 38.6-39.4 21.4
4.2 16.4 20 38.6-39.5 20.9
4.4 16.6 19 40.5-40.6 20.0
4.6 16.4 18 38.6-39.4 21.0
7.6 16.3 27 38.5-39.3 21.2
7.8 16.4 28 38.5-39.3 23.2
∗
Friction angle range, in degrees, determined from exponential and bi-linear fits to direct shear
data.
∗∗
T&O
=
Test data fromTrautmannand O'Rourke(1983).
product of soil unit weight,
, H, D, and length of pipe, L. This term provides a value
that can be scaled to various depths, diameters, and soil conditions of practical inter-
est. Table 17.1 summarizes information for each moist sand test shown in Figure 17.14,
includingdryunitweight,watercontent,frictionangle,andselectedvaluesofmaximum
γ
