3. A falling-head permeability test was run on a soil sample 9.6 cm in diameter and 10 cm long. The headat the start of the test was 90 cm. The coefficient of permeability of the soil was found to be5 x 10-6 cm/s. The diameterthe stand pipe was 1 cm.a) Determine the flow at the start of the test (cm³/hr)b) Determine how much head was lost during the first 30 minutesc) Determine the flow after 30 minutes (cm³/hr)1 cm ØStandpipeh9.6 cm ØSoilL = 10 cmUseful Formulas:-h1As dht =aLInk =A(t2 – t1)

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3. A falling-head permeability test was run on a soil sample 9.6 cm in diameter and 10 cm long. The head at the start of the test was 90 cm. The coefficient of permeability of the soil was found to be 5 x 10-6 cm/s. The diameter of the stand pipe was 1 cm. a) Determine the flow at the start of the test (cm³/hr) b) Determine how much head was lost during the first 30 minutes c) Determine the flow after 30 minutes (cm³/hr) 1 cm Ø Standpipe 9.6 cm Ø Soil L = 10 cm Useful Formulas: phe As dh t = al In k = A(t2 – t1)

3. A falling-head permeability test was run on a soil sample 9.6 cm in diameter and 10 cm long. The head at the start of the test was 90 cm. The coefficient of permeability of the soil was found to be 5 x 10-6 cm/s. The diameter of the stand pipe was 1 cm. a) Determine the flow at the start of the test (cm³/hr) b) Determine how much head was lost during the first 30 minutes c) Determine the flow after 30 minutes (cm³/hr) 1 cm Ø Standpipe 9.6 cm Ø Soil L = 10 cm Useful Formulas: phe As dh t = al In k = A(t2 – t1)

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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