Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN: 9781337705028
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 3, Problem 3.10P
To determine
Find the average relative density of the sand.
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Question 40
The results of a constant head permeability test for a fine sand are as follows:
Diameter of the sample = 25 cm
Length of sample = 80 cm
Constant head difference = 77 cm
Time of collection = 388 secs
Weight of water collected = 340 grams
Find the seepage velocity in cm/min. if the void ratio is 0.49. Round off to four decimal places.
21
The results of a constant head permeability test for a fine sand are as follows:
Diameter of the sample = 37 cm
Length of sample = 92 cm
Constant head difference = 78 cm
Time of collection = 337 secs
Weight of water collected = 375 grams
Find the seepage velocity in cm/min. if the void ratio is 0.6. Round off to four decimal places.
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
Chapter 3 Solutions
Principles of Foundation Engineering (MindTap Course List)
Ch. 3 - Prob. 3.1PCh. 3 - Prob. 3.2PCh. 3 - Prob. 3.3PCh. 3 - Refer to Figure P3.3. Use Eqs. (3.10) and (3.11)...Ch. 3 - Prob. 3.5PCh. 3 - Prob. 3.6PCh. 3 - Prob. 3.7PCh. 3 - Prob. 3.8PCh. 3 - Prob. 3.9PCh. 3 - Prob. 3.10P
Ch. 3 - Prob. 3.11PCh. 3 - Prob. 3.12PCh. 3 - Prob. 3.13PCh. 3 - Prob. 3.14PCh. 3 - Prob. 3.15PCh. 3 - Prob. 3.16PCh. 3 - Prob. 3.17PCh. 3 - Prob. 3.18PCh. 3 - Prob. 3.19PCh. 3 - Prob. 3.20PCh. 3 - Prob. 3.21PCh. 3 - Prob. 3.22PCh. 3 - Prob. 3.23PCh. 3 - Prob. 3.24PCh. 3 - Prob. 3.25PCh. 3 - Prob. 3.26PCh. 3 - Prob. 3.27PCh. 3 - Prob. 3.28PCh. 3 - Prob. 3.29PCh. 3 - Prob. 3.30PCh. 3 - Prob. 3.31P
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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 velocityarrow_forwardPROBLEM 2: During a constant-head permeability test on a sand sample, 260 x 10° mm³ of water were collected in 2 minutes. If the sample had a length of 100 mm, a diameter of 40 mm and a maintained head of 200mm. What is its coefficient of permeability? a. 0.769 mm/s b. 0.967 mm/s c. 1.321 mm/s d. 0.862 mm/sarrow_forwardThe results of a constant-head permeability test for a fine sand sample having a diameter of 150 mm and a length of 300 mm are as follows • Constant-head difference = 500 mm • Water collected in 5 min = 350 cm3 • Void ratio of sand = 0.61 Determine: a. Hydraulic conductivity, k (cm/sec) b. Seepage velocityarrow_forward
- Question 16 The results of a constant head permeability test for a fine sand are as follows Diameter of the sample = 33 cm Length of sample 55 cm Constant head difference =74 cm Time of collection 580 secs Weight of water collected = 382 grams Find the seepage velocity in cm/min. if the void ratio is 0 38. Round off to four decimal places. SUS WE Rarrow_forwardFor 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 velocityarrow_forwardPROBLEM No. 4 A sample of dry sand having a unit weight of 17.50 kN/m³ and a specific gravity of 2.69 is placed in the rain. During the rain, the volume of the sample remains constant but the degree of saturation increases to 45%. Determine the following: The void ratio of the sample in percent. b. The unit weight of the sample after being in the rain. The water content of the sample after being in the rain. a. С.arrow_forward
- 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 secarrow_forwardFor 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/secarrow_forwardRefer to Problem 3.5. Using Eq. (3.22), determine the averagerelative density of the sand.arrow_forward
- Exercise 1 A soil profile is shown in Figure Calculate the values of o, u, and o' at points A, B, C, and D. Plot the variation of o, u, and o' with depth. Dry sand roundwater table Thickness (ft) Unit weight (Ib/ft) Layer no. Laver IE H = 5 H2 = 6 H3 = 8 Ya = 112 Ysat = 120 Ysat = 125 Sand I II III TTE Figure 1arrow_forward2. 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.arrow_forward
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