For a falling head permeability test, these value are given:  Length of the soil specimen = 200 mm  Area of the soil specimen = 1000 mm2  Area of the standpipe = 40 mm2  Head difference at time, t = 0 min is 500 mm  Head difference at time, t = 3 min is 300 mm 1. Determine the hydraulic conductivity of the soil in cm/sec. 2. What was the head difference at time, t = 100 sec?

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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For a falling head permeability test, these value
are given:
 Length of the soil specimen = 200 mm
 Area of the soil specimen = 1000 mm2
 Area of the standpipe = 40 mm2
 Head difference at time, t = 0 min is 500 mm
 Head difference at time, t = 3 min is 300 mm
1. Determine the hydraulic conductivity of the
soil in cm/sec.
2. What was the head difference at time, t =
100 sec?

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