Table 2. Initial conditions on the surface of each soil layer. Cores taken and
calculations made by Richard Roberts, CRREL, 25 April 1995. Sample locations
shown in Figure 13. Core size = 0.01 ft3 = 283.2 cm3.
γ
γd
θ
w
s
(lb/ft3)
(Mg/m3)
(lb/ft3)
(Mg/m3)
e
n
(%)
(%)
(%)
Layer/core no.
1/BD1
127
2.03
104
1.66
0.63
0.39
22.7
37.6
97
2/BD2
126
2.01
103
1.64
0.65
0.39
22.3
36.4
92
3/BD3
126
2.02
104
1.67
0.62
0.38
21.2
35.2
92
γ=
moist unit weight (density)
n = porosity
γd =
dry unit weight (density)
w = gravimetric water content
θ = volumetric water content
e=
void ratio
s=
saturation
by embedding two stacked 2- 8-in. (5- 20-cm)
Instrumentation and measurements
planks in the soil (Fig. 10). We dug a trench,
Soil freezethaw
placed the planks in the trench, backfilled around
I froze the soil by placing three refrigeration
them, tamped them down and removed them
panels on the bin top and circulating the refriger-
before the first freeze.
ant through them (Fig. 11). The panels rested
a. Digging trench for planks.
c. Simulated rill before F1.
b. Tamping planks into trench.
Figure 10. Preparation of simulated rill.
10
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