6. The following data are for a falling-head permeability test: • Length of the soil sample = 140mm • Diameter of soil sample = 70 mm • Area of the standpipe = 19.6 mm? • At time t = 0, head difference 5 500 mm • At time t= 7 min, head difference 5 350 mm a. Determine the hydraulic conductivity of the soil (cm/sec). b. What was the head difference att=5 min?

6. The following data are for a falling-head permeability test: • Length of the soil sample = 140mm • Diameter of soil sample = 70 mm • Area of the standpipe = 19.6 mm? • At time t = 0, head difference 5 500 mm • At time t= 7 min, head difference 5 350 mm a. Determine the hydraulic conductivity of the soil (cm/sec). b. What was the head difference att=5 min?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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(i) Determine the hydraulic conductivity of the soil (m/sec)(ii) What was the head difference at t = 5 minutes?
The following data are for a falling-head permeability test:• Length of the soil sample = 140 mm• Diameter of soil sample = 70 mm• Area of the standpipe = 19.6 mm2• At time t = 0, head difference = 500 mm• At time t = 7 min, head difference = 350 mma. Determine the hydraulic conductivity of the soil (cm/sec)b. What was the head difference at t = 5 min?
7.8 The following data are for a falling-head permeability test: Length of the soil sample = 140 mm • Diameter of soil sample = 70 mm • Area of the standpipe = 19.6 mm² • At time t = 0, head difference = 500 mm • At time t = 7 min, head difference = 350 mm a. Determine the hydraulic conductivity of the soil (cm/sec) b. What was the head difference at t = 5 min?
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PROBLEM C For a falling head laboratory test, the following are the given values: • Length of soil specimen 210.00 mm Initial head 523.00 mm Final head 297.00 mm = Duration of test 3.50 mins 42.0 sq.mm 1050.00 sq.mm Area of standpipe Area of specimen A. Compute for the hydraulic conductivity of the soil in cm/sec. B. Determine the seepage velocity if n=0.35 C. Determine the head difference at t = 120 sec
For a falling head permeability test, these valueare given: Length of the soil specimen = 200 mm Area of the soil specimen = 1000 mm2 Area of the standpipe = 40 mm2 Head difference at time, t = 0 min is 500 mm Head difference at time, t = 3 min is 300 mm1. Determine the hydraulic conductivity of thesoil in cm/sec.2. What was the head difference at time, t =100 sec?
For a variable head permeability test, these values are given:• Length of the soil specimen 200 mm• Area of the soil specimen 1000 mm2• Area of the standpipe 40 mm2• Head difference at time t 0 is 500 mm• Head difference at time t 3 min is 300 mma. Determine the hydraulic conductivity of the soil in cm/sec.b. What was the head difference at time t 100 sec?
PROBLEM D For a falling head laboratory test, the following are the given values: • Length of soil specimen 480.0 mm Initial head 700.00 mm = Final head = 395.00 mm Duration of test = 5.5 mins 0.97 sq.cm Area of standpipe Area of specimen 18.0 sq.cm A. Compute for the hydraulic conductivity of the soil in cm/sec. B. Determine the head di fference at t = 3.50 mins.
The following data are for a falling-head permeability test:• Length of the soil sample = 150 mm• Area of soil sample = 1964 mm^2• Area of the standpipe = 25 mm^2• At time t = 0, head difference = 400 mm• At time t = 8 min, head difference = 200 mma. Determine the hydraulic conductivity of the soil (cm/sec). (ans. 2.75x10^-4 cm/s)b. What was the head difference at t = 6 min? (ans. 23.82cm)
A falling head hydraulic conductivity test is performed on a sample of soil. The following values are given: Length of specimen = 8 in. • Area of soil specimen = 1.6 in^2 • Area of standpipe = 0.06 in^2 • Head difference at time t=0 = 20 in %3D • Head difference at time t=180 sec = 12 in a. Find the coefficient of permeability of soil b. Compute the rate of flow of water in the soil
For a falling-head permeability test, the following values are given:• Length of specimen 8 in.• Area of soil specimen 1.6 in.2• Area of standpipe 0.06 in.2• Head difference at time t 0 20 in.• Head difference at time t 180 sec 12 in.Determine the hydraulic conductivity of the soil in in./sec
The results of a constant-head permeability test for a sand sample having a sectional area of 10000mm2 and a length of 200 mm are as follows: (1) Constant head difference 400mm (2) Time of collection of water = 30 seconds (3) Volume of water collected = 600 cm3. The hydraulic conductivity is: Oa. 1.0 mm/sec Ob. 1,7mm/sec c. 2.9 mm/sec O d. 0.5mm/sec