A falling head hydraulic conductivity test isperformed on a sample of soil. The followingvalues 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 ina. Find the coefficient of permeability of soilb. Compute the rate of flow of water in the soil

To find coefficient of permeability and flow rate

Answered: A falling head hydraulic conductivity…

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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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?
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 %3D a. Determine the hydraulic conductivity of the soil (cm/sec). b. What was the head difference at t= 5 min?
The data from a falling-head test on a silty clay are: Cross sectional area of soil = 1000 mm^2 Length of soil sample = 200 mm Area of stand pipe = 40 mm^2 Head difference at time t = 0 is 500 mm Head difference at time t = 3 min is 300 mm a) Determine the hydraulic conductivity of the soil in cm/sec. b) What is the head difference at time t = 100 sec in mm
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?
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
HYDRAULIC CONDUCTIVITY PROBLEM 1: The results of a constant head permeability test for a fine sand and sample having a diameter of 150 mm and a length of 150 mm are as follows: Constant head difference = 40 cm Time of collection of water = 83 sec Weight of water collected = 392 g Find the hydraulic conductivity a. 0.094 cm/sec b. 0.01 cm/sec C. c. 0.005 cm/sec d. 0.86 cm/sec
For a falling-head permeability test, the following values are given: Length of specimen = 200 mm %3D Area of soil specimen = 1000 mm^2 %3D Area of standpipe = 40 mm^2 Head difference at time t = 0 = 500 mm Head difference at timt t 180 seconds = 350 mm %D %3D Determine the hydraulic conductivity of the soil in x10 4 cm sec
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)
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.
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
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 falling head permeability test, these values are given: Length of the soil specimen = 200 mmArea of the soil specimen = 1000 mm2Area of the standpipe = 40 mm2Head difference at time t = 0 is 500 mmHead difference at time t = 3 min is 300 mm Determine: Hydraulic conductivity of the soil in cm/sec.Head difference at time t = 100 sec.

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