A constant head permeability test was conducted on a soil specimen under a hydraulicgradient of 2.5. The soil specimen has specific gravity of 2.65 and saturated water contentof 20%. If the coefficient of permeability of the soil is 0.1 cm/s, the seepage velocity(in cm/s, round off to two decimal places) through the soil specimen is

hydraulic gradient, i= 2.5. The soil specimen has specific gravity,G = 2.65 saturated water…

Answered: A constant head permeability test was…

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter2: Geotechnical Properties Of Soil

Section: Chapter Questions

Problem 2.8P

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A constant-head permeability test was conducted on a soil specimen under a hydraulic gradient of 2,5. The specimen has specific gravity of 2,65 and saturated water content of 20%. If the coefficient of permeability of the soil is 0.1 cm/s, the seepage velocity (in cm/s, (round off to two decimal places) through the soil specimen is
From the constant head permeability test, the following values are given: Void ratio of specimen 0.46 Length of soil sample 450 mm Constant head difference 700 mm Water collected in a period of 180 seconds Cross-sectional area of soil sample 3.54 x 10-4 m³ 2.26 x 10-3 m² a.) Determine the coefficient of permeability in m/hour. b.) Compute the discharge velocity in mm/s. c.) Compute the seepage velocity in mm/s. d.) If the test was done at 24°C, what is its corrected coefficient of permeability?
A constant-head test was conducted on a sample of soil 15 cm long and 60 cm2 in cross-sectional area. The quantity of water collected was 50 cm3 in 20 seconds under a head difference of 24 cm. Calculate the hydraulic conductivity. If the porosity of the sand is 55%, calculate the average velocity and the seepage velocity. Estimate the hydraulic conductivity of a similar soil with a porosity of 35% from the results of this test. What is the soil type tested?
A constant-head test was conducted on a sample of soil 15 cm long and 60 cm2 in cross-sectional area. The quantity of water collected was 50 cm3 in 20 seconds under a head difference of 24 cm. Calculate the hydraulic conductivity. If the porosity of the sand is 55%, calculate the average velocity and the seepage velocity. Estimate the hydraulic conductivity of a similar soil with a porosity of 35% from the results of this test.
For a falling head permeability test, the following are given: length of specimen is 360 mm, area of specimen is 70 cm2 , and hydraulic conductivity of soil specimen is 0.165 cm/min. what should be the area of the stand pipe for the head to drop from 700cm to 360cm in 7 mins? compute the seepage velocity under the test condition if the soil specimen has a void ratio of 0.55 in cm/sec compute the head difference at time equal to 5 minutes?
Problem # 1. A constant head permeability test is performed on a sample of granular soil. The length of the soil sample is 15 cm and the cross-sectional area is 10 cm^2. If a 24 cm^3 volume of water passes through the oil sample in a 3-minute period and the constant head is 30 cm determine the followinga. Determine the coefficient of permeability of the soil.b. Find the discharge velocity.c. Compute the seepage velocity if the void ratio is 0.64.
Problem: For a constant laboratory permeability test on a fine sand, the following data are given: Length of specimen - 16 cm Diameter of specimen - 9.6 cm Constant head difference - 50 cm Volume of water collected in 4 min - 420 cc Void ratio of the soil specimen - 0.55 A.) Determine the hydraulic conductivity of the soil in cm/sec B.) Determine the discharge velocity in cm/sec C.) Determine seepage velocity in cm/sec Problem: For a falling head permeability test, the following are given: Length of Soil Specimen - 200mm Area of Soil Specimen - 1000mm^2 Area of Stand pipe - 40mm^2 Head Difference at time t = 0 min - 500mm Head Difference at time t = 3 min - 300mm A.) Compute hydraulic conductivity of the soil in cm/sec B.) Compute the seepage velocity if the porosity is 0.25 in cm/sec C.) What is the head difference at time t = 100 sec in mm
Problem: For a constant laboratory permeability test on a fine sand, the following data are given: Length of specimen - 16 cm Diameter of specimen - 9.6 cm Constant head difference - 50 cm Volume of water collected in 4 min - 420 cc Void ratio of the soil specimen - 0.55 A.) Determine the hydraulic conductivity of the soil in cm/sec B.) Determine the discharge velocity in cm/sec C.) Determine seepage velocity in cm/sec
2. For a falling head permeability test, the following are given. Length of specimen is 380 mm, are of specimen = 6.5 cm², hydraulic conductivity of soil specimen is 0.175 cm/min. a. What should be the area of the stand pipe for the head to drop from 650 cm to 300 cm in 8 min? b. Compute the the interstitial velocity under the test condition if the soil specimen has a void ratio of 0.50 in cm/sec. the head difference at time equal to 6 min. c. Compute
(i) Determine the hydraulic conductivity of the soil (m/sec)(ii) What was the head difference at t = 5 minutes?
FUNDAMENTALS OF GEOTECHNICAL ANALYSIS A constant head permeability test is performed on soil that is 2 cm x 2 cm square, and 2.5cm long. The head difference applied during the test is 20 cm and 7 cm3 is collected over a time of 100 sec. Provide step by step solution. a) Compute the permeability based on these test conditions and results. b) A falling head test is conducted on the same soil specimen at the same time (t1 – t2 = 100 sec), and the standpipe diameter is 0.8 cm. If the average head during the test should be 18 cm, what are h1 and h2 values?
b) For a constant head permeability test on a sand, these values are given:Length of the specimen = 720 mmDiameter of the soil specimen = 210 mm2Head difference = 990 mmWater collected in 5.5 min = 635 cm3Void ratio of the soil = 0.54Hence, determine:i) Hydraulic conductivity of the soilii) Discharge velocityiii) Seepage velocity

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