The figure below shows the soil profile at a site where you plan to lower the water table. You have results from two consolidation tests, one from the upper 12 ft thick overconsolidated crust, and another from the lower 40 ft thick normally consolidated zone. You plan to lower the water table from its current 12 ft depth to 25 ft below ground surface. The consolidation properties for each layer are shown. (Assume that changes in GWT do not affect γt of clay). a. Compute the σ′v in the middle of each layer before and after the water table is lowered b. Determine the total settlement that will result from lowering the water table

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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The figure below shows the soil profile at a site where you plan to lower the water table. You have results from two consolidation tests, one from the upper 12 ft thick overconsolidated crust, and another from the lower 40 ft thick normally consolidated zone. You plan to lower the water table from its current 12 ft depth to 25 ft below ground surface. The consolidation properties for each layer are shown. (Assume that changes in GWT do not affect γt of clay). 
a. Compute the σ′v in the middle of each layer before and after the water table is lowered 
b. Determine the total settlement that will result from lowering the water table 

Depth (ft)
0
Stiff clay, Y₁ = 120 pcf, Cre= 0.029, Cce = 0.178, op = 1650 psf
y,
▼
P
12
25 Z
V
52
Soft clay, y, 118 pcf, Cr = 0.034, C = 0.185
Copright (201| Perion faucation, publishing a Peto rul
Transcribed Image Text:Depth (ft) 0 Stiff clay, Y₁ = 120 pcf, Cre= 0.029, Cce = 0.178, op = 1650 psf y, ▼ P 12 25 Z V 52 Soft clay, y, 118 pcf, Cr = 0.034, C = 0.185 Copright (201| Perion faucation, publishing a Peto rul
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