vertical stress at the middle of the clay layer will increase by 132 kPa. Ca consolidation settlement. Ground water level is at the top of the clay layer. An oe a sample of the clay revealed that 90% consolidation on a 20-mm thick sample minutes. The sample was drained on the upper and lower boundaries. Estimate t settlement in one year. Gs(clay) = 2.70 and Gs(sand) = 2.60.

Principles of Geotechnical Engineering (MindTap Course List)
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Chapter12: Shear Strength Of Soil
Section: Chapter Questions
Problem 12.18P
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Figure 1 office illustrates the soil profile at a site for a proposed building. It is expected that the
vertical stress at the middle of the clay layer will increase by 32 kPa. Calculate the final
consolidation settlement. Ground water level is at the top of the clay layer. An oedometer test on
a sample of the clay revealed that 90% consolidation on a 20-mm thick sample occurred in 40
minutes. The sample was drained on the upper and lower boundaries. Estimate the consolidation
settlement in one year. Gs(clay) = 2.70 and Gs(sand) = 2.60.
5 m
w = 23%
Sand
S = 90%
w = 40%
10 m C= 0.3
OCR = 1
Clay
Impervious rock
Figure 1
0.9
U.
avg
0.00
0.000
0.8
0.0
0.1
0.0
0.008
0.031
0.071
0.05
0.252
0.10
0.357
0.197 0.500
0.7
02
0.3
0.20
0.30
0.40
0.504
0.6
04
0.126
0.613
0.698
0.764
0.816
0.856
0.887
0.848 0.900
0.912
0.931
0.980
0.5
0.197
0.5
0.6
0.287
0.50
0.7
0.403
0.60
0.4
0.567
0.70
0.848
0.95 1.163
0,9
0.80
0.3
1.0
0.90
02
1.00
1.50
2.00
0.1
0.994
02
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
Time factor, T
Averagedegree of consolidation, U
으 67898
Transcribed Image Text:Figure 1 office illustrates the soil profile at a site for a proposed building. It is expected that the vertical stress at the middle of the clay layer will increase by 32 kPa. Calculate the final consolidation settlement. Ground water level is at the top of the clay layer. An oedometer test on a sample of the clay revealed that 90% consolidation on a 20-mm thick sample occurred in 40 minutes. The sample was drained on the upper and lower boundaries. Estimate the consolidation settlement in one year. Gs(clay) = 2.70 and Gs(sand) = 2.60. 5 m w = 23% Sand S = 90% w = 40% 10 m C= 0.3 OCR = 1 Clay Impervious rock Figure 1 0.9 U. avg 0.00 0.000 0.8 0.0 0.1 0.0 0.008 0.031 0.071 0.05 0.252 0.10 0.357 0.197 0.500 0.7 02 0.3 0.20 0.30 0.40 0.504 0.6 04 0.126 0.613 0.698 0.764 0.816 0.856 0.887 0.848 0.900 0.912 0.931 0.980 0.5 0.197 0.5 0.6 0.287 0.50 0.7 0.403 0.60 0.4 0.567 0.70 0.848 0.95 1.163 0,9 0.80 0.3 1.0 0.90 02 1.00 1.50 2.00 0.1 0.994 02 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 Time factor, T Averagedegree of consolidation, U 으 67898
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