For a constant head laboratory permeability test on a fine sand, the following are given: Length of specimen = 250 mm Dia. of specimen = 62.5 mm Head difference = 450 mm Water collected in 2 min. = 484 cu.mm Determine the discharge velocity in mm/sec. 0.0789 mm/sec 0.001315 mm/sec 4.734 mm/sec 0.0438 mm/sec

For a constant head laboratory permeability test on a fine sand, the following are given: Length of specimen = 250 mm Dia. of specimen = 62.5 mm Head difference = 450 mm Water collected in 2 min. = 484 cu.mm Determine the discharge velocity in mm/sec. 0.0789 mm/sec 0.001315 mm/sec 4.734 mm/sec 0.0438 mm/sec

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 7.17P

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1. For a constant head laboratory permeability test on a fine sand, the following values are given: L = 300 mm; D₁ = 200 mm; h = 400 mm; Vol = 420 m³; t = 4 min; e = 0.55. a. Compute the coefficient of permeability in cm/sec. b. Compute the discharge velocity in cm/sec. c. Compute the velocity. seepage 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?
PART IV: PERMEABILIT Y PROBLEM A For a constant head laboratory test on a fine sand, the following are the given values : • Length of the specimen • Di ameter of the specimen 14.0 inches 3.25 inches He ad difference 25.0 inches Water collected in 2.50 mins Void ratio A. Compute for the hydraulic conductivity of the soil in in/sec. B. Determine the discharge velocity through the soil in in/sec. c. Determine the seepage velocity in in/sec. 0.065 cubic inches 0.45
For a constant head laboratory permeability test on a fine sand, the following are given:Length of specimen = 250 mmDia. of specimen = 62.5 mmHead difference = 450 mmWater collected in 2 min. = 484 cu.mmDetermine the discharge velocity in mm/sec.
PROBLEM B For a constant head laboratory test on a fine sand, the following are the given values: • Length of the specimen • Di ameter of the specimen 14.00 cm 7.60 cm Head difference 42.00 cm Water collected in 3.50 mins 395 cu.cm Void ratio 0.40 A. Compute for the hydraulic conductivity of the soil in cm/sec. B. Determine the discharge velocity through the soil in cm/sec. c. Determine the seepage velocity in cm/sec.
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 seepage velocity in m/min. Round off to four decimal places. b. determine the discharge velocity in m/min. Round off to four decimal places.
A sample of sand is subjected to a constant head permeability test. The sample diameter is 60 mm and its length is 130 mm. Under an applied head of 60 cm, 119 cm³ of water flows through the sample in 5 minutes. Determine (a) the coefficient of permeability, and (b) the discharge velocity.
1.) For a constant head laboratory permeability test on a fine sand. Thefollowing values are obtained:Length of Specimen, L = 10 inchesDiameter of Specimen = 2.5 inchesHead difference, h = 2.5 inchesWater collected in 2 mins = 0.044 in3 The void ratio of the specimen is 0.34.Compute the following:a) Hydraulic Conductivity of the soil in in/minb) Discharge Velocity in in/minc) Seepage Velocity in in/min 2.) A series of direct shear test was performed on a soil sample. Thedata for the experiments are tabulated as follows: Specimen No. Normal Stress (kPa) Shearing Stress (kPa) 1 200 450 2 400 520 3 600 590 4 1000 730 a) Compute the cohesion of the soil.b) Compute the angle of internal friction.
In a constant head permeability test, the length of the specimen is 150 mm and the cross sectional area is 1367 mm2. If k =0.062 cm/sec and a rate of flow 160cm3/min has to be maintained during the test, what should be the head differ
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.
2. A constant head laboratory permeability test an o fines and gives the following values Length of specimen - 254 mm Diameter of specimen -63.5 mm Head difference=457 mm Water collected in 2 min -0.51 cm^3 Determine these values o. Hydraulic conductivity, k, of the soil (cm/sec) b. Discharge velocity (cm/sec) c. Seepoge velocity (cm/sec) The void ratin of the soil specimen is 0.46.
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 cmHead at time is 4 min = 25 cmDetermine the seepage velocity in cm/min. Use void ratio = 0.55. Round off to three decimal places.
Problem 4. A sample of sand is tested in a constant head permeameter. The sample diameter is 50 mm and its length is 120 mm. Under an applied head of 60 cm, 113 cm³ flows through the sample in 5 minutes. The Mof the sample is 385 grams. Calculate: a. the Darcy coefficient of permeability (k) b. the discharge velocity (v) c. the seepage velocity (v₁)