Question
Asked Nov 26, 2019
6 views
(c) In a constant head permeability test conducted on a
medium silt, the following data was obtained
Head maintained 60 cm
Diameter of the permeameter = 10 cm
Thickness of the soil specimen 10cm
Discharge collected in 2-50 min 10c.c
If a falling head test is conducted on the same sample
what time would be required for the head to fall from
60 cm to 30cm in the stand pipe which has a
cross-section area of 1-25 cm2?
8
help_outline

Image Transcriptionclose

(c) In a constant head permeability test conducted on a medium silt, the following data was obtained Head maintained 60 cm Diameter of the permeameter = 10 cm Thickness of the soil specimen 10cm Discharge collected in 2-50 min 10c.c If a falling head test is conducted on the same sample what time would be required for the head to fall from 60 cm to 30cm in the stand pipe which has a cross-section area of 1-25 cm2? 8

fullscreen
check_circle

Expert Answer

star
star
star
star
star
1 Rating
Step 1

given:

Head maintained= 60 cm

Diameter of the permeameter=10 cm

'Thickness of the soil specimen,or the length of sample ,l=10 cm

Discharge collected in 2.50 min =10 cc

If a falling head test is conducted on the same sample

Head falls from h1 = 60cm to h2 = 30cm in the standpipe which has a

cross-section area ,a=25 cm2 

Step 2

from the constant head permeability test, we will determine the permeability ,k:

help_outline

Image Transcriptionclose

QL k hAt putting the requisite values above, 10cm3 x10cm k 60cmx(10cm) x 2.50min 4 k =8.48x 10 cm min

fullscreen
Step 3

now,

, from falling head permeability test for the same sample we will calculate the time, t taken by heads to fall from h1 = 60...

help_outline

Image Transcriptionclose

from falling head test the time t will be given by: 2.303aL logi0 At k 60 -log10 30 2.303 x 1.25cm2 x 10cm t (10cm)x8.48x 10 cmmin" 4 t 13.01minutes

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in
EngineeringCivil Engineering

Geotechnical Engineering

Related Civil Engineering Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: the following results were recorded during a shear box test on a cohesive soil. if the specimen size...

A: Given data:The side of the specimen is 60mm is equal to 0.06 m.The result of the test are,

question_answer

Q: consider a beam shown in the attached figure express the internal moment in the beam as a function o...

A: Click to see the answer

question_answer

Q: Flow characteristics for a 30 ft. diameter prototype parachute are to be determined by tests of a 1 ...

A: Write the fundamental units of drag force, diameter of the parachute, velocity, and mass density as ...

question_answer

Q: 7.7 The center of gravity of the 50-kg spool is at G. A cable wound around the hub of the spool is a...

A: “Hey, since there are multiple questions posted, we will answer first question. If you want any spec...

question_answer

Q: A dilatometer test was conducted in a sand deposit ata depth of 6 m. The groundwater table was locat...

A: Following is the figure fetched from the given information.

question_answer

Q: When small particles of diameter d are transported by a moving fluid having a velocity V, they settl...

A: Following is the given information:When small particles of diameter d are transported by a moving fl...

question_answer

Q: A spherical tank has been fabricated by bolting together two hemispherical thin shells with a thickn...

A: Check for thin wall:Determine the ratio of radius of the tank to the thickness of shell.The thin-wal...

question_answer

Q: The bean is fabricated from two equivalent structural tees and two plates. Each plate has a height o...

A: Lets calculate I at Neutral axis

question_answer

Q: Fluid Mechanics: Laminar flow occurs between two horzontal parallel plates under a pressure gradient...

A: Part AIt is given that the dp/ds is negative in the positive direction and Ut is in the negative dir...