For a falling a head permeability test, the following data were recorded. Length of soil specimen = 500 mm. Area of soil specimen = 16 cm2 Area of stand pipe = 0.97 cm2 Head difference at time t =0 is 760 mm. Head difference at time t = 6min. is 410mm. The test was conducted at a temp. of 20 ֯C. with a unit wt. of water equal to 9.789 kN/m3 and the viscosity of water at 20 ֯C is 1.005 x 10-3 N.8/m2 . Compute the hydraulic conductivity of the soil. Compute the absolute permeability of the soil. What is the head difference at time t = 4 min?

For a falling a head permeability test, the following data were recorded. Length of soil specimen = 500 mm. Area of soil specimen = 16 cm2 Area of stand pipe = 0.97 cm2 Head difference at time t =0 is 760 mm. Head difference at time t = 6min. is 410mm. The test was conducted at a temp. of 20 ֯C. with a unit wt. of water equal to 9.789 kN/m3 and the viscosity of water at 20 ֯C is 1.005 x 10-3 N.8/m2 . Compute the hydraulic conductivity of the soil. Compute the absolute permeability of the soil. What is the head difference at time t = 4 min?

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter6: Hydraulic Conductivity

Section: Chapter Questions

Problem 6.7P

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Laboratory Determination of Hydraulic Conductivity

Hydraulic conductivity is the measure of flowability of water inside the soil in the presence of a hydraulic gradient. The hydraulic gradient is defined as the difference in the water heads in the soil, which induces a water motion. In simple terms, a hydraulic gradient is the presence of a potential that induces a flow of water.

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Compute the hydraulic conductivity of the soil.
Compute the absolute permeability of the soil.
What is the head difference at time t = 4 min?

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(i) Determine the hydraulic conductivity of the soil (m/sec)(ii) What was the head difference at t = 5 minutes?
Determine the coefficient of permeability of the soil. For a falling- head permeability test, the following are given: re Length of the specimen = 115.5 mm Diameter of soil specimen =104.7 mm Diameter of the stand pipe = 15 mm Head difference at time t=0 is 1360 mr Head difference at timet=78600 sec is 820 mm
Please help answer problem 1,2 & 3 Thank you
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