Civil Engineering Reference
In-Depth Information
Figure 7.12
Results of falling head permeability test - Example 7.2.
Example 7.3: Interpretation of a drained triaxial test
The first three columns of
Table 7.3 give data from a drained triaxial compression test in which the cell pres-
sure was held constant at
σ
=
300 kPa and the pore pressure was held constant at
c
=
u
100 kPa. At the start of the test the sample was 38 mm in diameter and 76 mm
long and its specific volume was
v
=
2.19.
Table 7.3
Results of drained triaxial test - Example 7.3
q
(kPa)
p
(kPa)
Axial
force
F
a
(N)
Change of
length
L (mm)
Change of
volume
V (cm
3
)
ε
s
ε
v
v
0
0
0
0
0
2.19
0
200
115
−
1.95
−
0.88
0.022
0.010
2.17
100
233
235
−
5.85
−
3.72
0.063
0.042
2.10
200
267
325
−
11.70
−
7.07
0.127
0.080
2.01
264
288
394
−
19.11
−
8.40
0.220
0.095
1.98
287
296
458
−
27.30
−
8.40
0.328
0.095
1.98
286
296
The initial dimensions of the sample were
A
0
=
4
D
0
=
10
−
3
m
2
1.134
×
10
−
6
m
3
V
0
=
A
0
L
0
=
88.46
×
