The following data are for a falling-head permeability test: • Length of the soil sample = 150 mm • Area of soil sample = 1964 mm^2 • Area of the standpipe = 25 mm^2 • At time t = 0, head difference = 400 mm • At time t = 8 min, head difference = 200 mm a. Determine the hydraulic conductivity of the soil (cm/sec). (ans. 2.75x10^-4 cm/s)

Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
Publisher:Braja M. Das, Khaled Sobhan
Chapter7: Permeability
Section: Chapter Questions
Problem 7.14P
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The following data are for a falling-head permeability test:
• Length of the soil sample = 150 mm
• Area of soil sample = 1964 mm^2
• Area of the standpipe = 25 mm^2
• At time t = 0, head difference = 400 mm
• At time t = 8 min, head difference = 200 mm
a. Determine the hydraulic conductivity of the soil (cm/sec). (ans. 2.75x10^-4 cm/s)
b. What was the head difference at t = 6 min? (ans. 23.82cm)

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