An embankment load on a silty clay soil layer as shown below. Determine the stress increase under the embankment at points A and B that are loaded at a depth of 6 m below the ground surface. 5 m 1H:2V 1H:2V 1H:1V 8 m y=18 kN/m Y=18 kN/m

Structural Analysis
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Chapter2: Loads On Structures
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An embankment load on a silty clay soil layer as shown below. Determine the
stress increase under the embankment at points A and B that are loaded at a depth
of 6 m below the ground surface.
5 m
1H:2V
1H:2V
1H:1V
8 m
13
y=18 kN/m
Y=18 kN/m³
6 m
: B
: A
CS Scanned with CamScanner
Transcribed Image Text:An embankment load on a silty clay soil layer as shown below. Determine the stress increase under the embankment at points A and B that are loaded at a depth of 6 m below the ground surface. 5 m 1H:2V 1H:2V 1H:1V 8 m 13 y=18 kN/m Y=18 kN/m³ 6 m : B : A CS Scanned with CamScanner
Aơ =
(6.33)
where I' = a function of B/z and B2/z.
The variation of I' with B/z and B,/z is shown in Figure 6.18. An application of this
diagram is given in Example 6.8.
0.50
2.03.0-
1.6
1.4
1.2
0.45
1.0
0.40
0.9
0.8
0.7
0.35
0.6
0.30
0.5
0.4
I'
0.25
0.20
0.2
0.15
Figure 6.18 Influence value I' for
embankment loading (After Osterberg,
1957) Osterberg, J. O. (1957).
"Influence Values for Vertical Stresses
0.10
0.1
B1lz = 0
in Semi-Infinite Mass Due to
Embankment Loading," Proceedings,
Fourth International Conference on Soil
Mechanics and Foundation Engineering,
London, Vol. 1. pp. 393–396. With
permission from ASCE.
0.05
0.01
0.1
1.0
10
B2lz
JuulL
Transcribed Image Text:Aơ = (6.33) where I' = a function of B/z and B2/z. The variation of I' with B/z and B,/z is shown in Figure 6.18. An application of this diagram is given in Example 6.8. 0.50 2.03.0- 1.6 1.4 1.2 0.45 1.0 0.40 0.9 0.8 0.7 0.35 0.6 0.30 0.5 0.4 I' 0.25 0.20 0.2 0.15 Figure 6.18 Influence value I' for embankment loading (After Osterberg, 1957) Osterberg, J. O. (1957). "Influence Values for Vertical Stresses 0.10 0.1 B1lz = 0 in Semi-Infinite Mass Due to Embankment Loading," Proceedings, Fourth International Conference on Soil Mechanics and Foundation Engineering, London, Vol. 1. pp. 393–396. With permission from ASCE. 0.05 0.01 0.1 1.0 10 B2lz JuulL
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