For a falling laboratory permeability test on a fine sand, the following data are given: Length of specimen = 10 cm. Diameter of specimen = 9.5 cm. Diameter of standpipe = 1.5 cm. Head at time is zero = 50 cm Head at time is 4 min = 25 cm Determine the seepage velocity in cm/min. Use void ratio = 0.55. Round off to three decimal places.

For a falling laboratory permeability test on a fine sand, the following data are given: Length of specimen = 10 cm. Diameter of specimen = 9.5 cm. Diameter of standpipe = 1.5 cm. Head at time is zero = 50 cm Head at time is 4 min = 25 cm Determine the seepage velocity in cm/min. Use void ratio = 0.55. Round off to three decimal places.

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter7: Permeability

Section: Chapter Questions

Problem 7.13P

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For a constant-head permeability test in a sand, the following are given: (L = 300 mm, Water collected in 3 min = 620 cm^3, A = 175 cm^2, Void ratio of sand = 0.58, h = 500 mm). Determine the seepage velocity.
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For a constant head permeability test in a sand, the following values are given:• L 350 mm• A 125 cm2• h 420 mm• Water collected in 3 min 580 cm3• Void ratio of sand 0.61Determine:a. Hydraulic conductivity, k (cm/sec)b. Seepage velocity
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2. Situation 2 - For a constant laboratory permeability test on a fine sand, the following data are given: Length of specimen = 16 cm Diameter of specimen = 96 mm 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 m/min. Round off to four decimal places. b. Determine the discharge velocity in m/min. Round off to four decimal places. c. Determine the seepage velocity in m/min. Round off to four decimal places.
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The results of a constant-head permeability test for a fine sand sample having a diameter of 70 mm and a length of 140 mm are as follows (refer to Figure 7.5):• Constant-head difference = 550 mm• Water collected in 7 min = 450 cm3• Void ratio of sand = 0.8Determine:a. Hydraulic conductivity, k (cm/sec)b. Seepage velocity
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A constant head permeability test was carried out on a cylindrical sample of sand 10 cm diameter and 15 cm height. 160 cm³ of water was collected in 31.75 sec under a head of 30 cm. 1. Compute the coefficient of permeability in cm/s. 2. Compute the velocity of flow in m/s.
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