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 h 9.6 cm Ø Soil L = 10 cm
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 h 9.6 cm Ø Soil L = 10 cm
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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![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:
hi As dh.
t =
h,
In ()
aL
k =
A(t2 – t,) h,](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F461cde02-95c3-4352-8e67-8c2c3ec5d00d%2Fdc22b548-110a-4ceb-8d74-ca29fb81cfa1%2Frm7fi1t_processed.jpeg&w=3840&q=75)
Transcribed Image Text: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:
hi As dh.
t =
h,
In ()
aL
k =
A(t2 – t,) h,
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