is 25 cm long having a cross-sectional area of 24 cm2. The cross-sectional area of the standpipe is 2 cm2. The sample of soil is made of three layers perpendicular to the direction of the flow. The thickness of the top layer is 8 cm and has a value of k1 = 4 x 10-4 cm/sec, the second layer of thickness 10 cm has k2 = 6 x 10-4 cm/sec, and the bottom layer of thickness 7 cm has k3
is 25 cm long having a cross-sectional area of 24 cm2. The cross-sectional area of the standpipe is 2 cm2. The sample of soil is made of three layers perpendicular to the direction of the flow. The thickness of the top layer is 8 cm and has a value of k1 = 4 x 10-4 cm/sec, the second layer of thickness 10 cm has k2 = 6 x 10-4 cm/sec, and the bottom layer of thickness 7 cm has k3
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 7.17P
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In a falling head permeameter, the sample used is 25 cm long having a cross-sectional area of 24 cm2. The cross-sectional area of the standpipe is 2 cm2. The sample of soil is made of three layers perpendicular to the direction of the flow. The thickness of the top layer is 8 cm and has a value of k1 = 4 x 10-4 cm/sec, the second layer of thickness 10 cm has k2 = 6 x 10-4 cm/sec, and the bottom layer of thickness 7 cm has k3 = 8 x 10-4 cm/sec.
Calculate the time required for a drop of head from 25 to 12 cm. ( in minutes).
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