Environmental Engineering Reference
In-Depth Information
TABLE 3.39
Typical Properties of Compacted Soils
a
Typical Value of
Typical Strength Characteristics
Compression
Percent of Original
Height
Typical
Range of
Effective
Coefficient
Range of
Maximum
Range of
At 3.6
Stress
of
Range
Subgrade
Group
Dry Unit
Optimum
At 1.4 tsf
tsf (50
Cohesion as
Cohesion
Envelope
φ
Permeability
of CBR
Modulus
k
s
Symbol
Soil Type
Weight (pcf)
Moisture (%)
(20 psi)
psi)
Compacted (psf)
(Saturated) (psf)
(deg)
tan
φ
(ft/min)
Values
(lb/in.
3
)
GW
Well-graded
125-135
11-8
0.3
0.6
0
0
38
0.79
5
10
2x
40-80
300-500
clean gravels,
gravel-sand
mixtures
GP
Poorly graded
115-125
14-11
0.4
0.9
0
0
37
0.74
10
1
30-60
250-400
clean gravels,
gravel-sand
mix
GM
Silty gravels,
120-135
12-8
0.5
1.1
-
-
>
34
0.67
10
6
20-60
100-400
poorly graded
gravel-sand silt
GC
Clayey gravels,
115-130
14-9
0.7
1.6
-
-
31
0.60
10
7
20-40
100-300
poorly graded
gravel-sand-
clay
SW
Well-graded
110-130
18-9
0.6
1.2
0
0
38
0.79
10
3
20-40
200-300
clean sands,
gravelly sands
SP
Poorly-graded
100-120
21-12
0.8
1.4
0
0
37
0.74
10
3
10-40
200-300
clean sands,
sand-gravel
mix
SM
Silty sands,
110-125
16-11
0.8
1.6
1050
420
34
0.67
5
10
5
10-40
100-300
poorly graded
sand-silt mix
