falling head hydraulic conductivity test is performed on a sample of soil. The standpipe. having a diameter 0.35 cm is observed and it takes 80 seconds for the water to drop by 70 cm from an initial hydraulic head of 90 cm. The sample has a length of 22 cm, and a diameter of 5 cm. Compute the rate of flow of

falling head hydraulic conductivity test is performed on a sample of soil. The standpipe. having a diameter 0.35 cm is observed and it takes 80 seconds for the water to drop by 70 cm from an initial hydraulic head of 90 cm. The sample has a length of 22 cm, and a diameter of 5 cm. Compute the rate of flow of

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 7.23P

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A falling head hydraulic conductivity test is performed on a sample of soil. The standpipe having a diameter 0.35 cm is observed and it takes 80 seconds for the water to drop by 70 cm from an initial hydraulic head of 90 cm. The sample has a length of 22 cm, and a diameter of 5 cm. Compute the rate of flow of water in the soil (in cm/s).
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Question 2 * The permeameter in a permeability test setup involves a soil sample 200 mm diameter and a length of 30 mm. The height of water is kept constant at 400 mm. In a duration of 4 min, water was collected in the graduated flask having a volume of 420 cu. cm. Determine the following. Flow Rate o Hydraulic gradient o Hydraulic conductivity
A constant-head test was conducted on a sample of soil 15 cm long and 60 cm^2 in cross-sectional area. The quantity of water collected was 50 cm^3 in 20 seconds under a head difference of 24 cm. Calculate the hydraulic conductivity in cm/s. a.1.0 x 10^-1 b.4.3 x 10^-3 c.2.6 x 10^-6 d.3.47 x 10^-2
21% 1 8:19 M f Document 17.pdf The data from à falling head test as shown in the figure: Diameter of standpipe Initial head Final head Duration of test. Length of soil sample.... Diameter of permeameter is 40 cm. 6 mm 92 cm. 85 cm. 12 min. 30 cm. Determine the coefficient of permeability in cm/min. at 20°C. Determine the hydraulic gradient. Determine the rate of flow of water in the soil. O Compute the seepage velocity if the porosity of the soil is 0.25. Determine the coefficient of permeability it the temp. during measurement was 22°C. (3)
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A soil sample 10 cm in diameter is placed in a tube Im long. A constant supply of water is allowed to flow into one end of the soil at A and the outflow at B is collected by beaker. The average amount of water collected is 1 cm for every 10 seconds. Determine: a. Hydraulic gradient b. Flow rate c. Average velocity d. Seepage velocity, if e 0.6 e. Hydraulic conductivity 1 m 1 m 0.8 m Datum Table
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I need just the answer of (b) A soil sample 12 cm in diameter is placed in a tube 1 m long. A constant supply of water is allowed to flow into one end of the soil at A, and the outflow at B is collected by a beaker. The average amount of water collected is 2.5 cm3 for every 5 seconds. The tube is inclined as shown in the Figure . Determine the :
A constant head test is performed using a permeameter in the laboratory. The graduated cylinder collects 892 cm3 of water in 112 seconds. The soil specimen diameter = 18 cm , th elevation of water in upper-most piezometer is 181 com , the elevation of water in lowest piezometer is 116.6 cm and the piezometer inlets are evenly spaced at 16.7 cm on center. Compute the hydraulic conductivity, k and choose the correct answer below based on that. O A. 2.1 x 10^-3 cm/second O B. 1.5 x 10^-2 cm/second O C. 2.91 x 10^-2 cm/second O D. 2 x 10^-2 cm/second QUESTION 10 Given: -Applied stress on a soil = 122 kPa %3D -Influence Factor = 0.4 Compute the change in stress at 10 m below the edge of 25 m dimeter oil tank and select the correct answer from below: O A. Change in stress = 44 kPa O B. Change in stress = 49 kPa O C. Change in stress = 40 kPa O D. Change in stress = 42 kPa %3D
The permeameter in a perrneability test setup involves a soil sample 200 mm diameter and a length of 30 mm. The height of water is kept constant at 400 mm. In a duration of 4 min, water was collected in the graduated flask having a volume of 420 cu. cm. Determine the following. Flow Rate Hydraulic gradient Hydraulic conductivity
For a falling head permeability test, the following values are given: Length of specimen: 200 mm Area of specimen:1000 sq. mm Area of standpipe: 40 sq. mm Head difference at t= 0: 500 mm Head difference at t= 180 sec : 300 mm Determine the hydraulic conductivity (cm/sec)