EBK PRINCIPLES OF FOUNDATION ENGINEERIN
8th Edition
ISBN: 8220100547058
Author: Das
Publisher: CENGAGE L
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Chapter 2, Problem 2.27P
(a)
To determine
Find the soil friction angle
(b)
To determine
Find the soil friction angle
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The results of a constant head permeability test for a fine sand are as follows:
Diameter of the sample = 41 cm
Length of sample = 66 cm
Constant head difference = 30 cm
Time of collection = 473 secs
Weight of water collected = 416 grams
Find the seepage velocity in cm/min. if the void ratio is 0.43.
The results of a constant head permeability test for a fine sand are as follows:
Diameter of the sample = 31 cm
Length of sample = 98 cm
Constant head difference = 52 cm
Time of collection = 364 secs
Weight of water collected = 448 grams
Find the seepage velocity in cm/min. if the void ratio is 0.33. Round off to four decimal places.
Answer:
0.3943
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.
Chapter 2 Solutions
EBK PRINCIPLES OF FOUNDATION ENGINEERIN
Ch. 2 - Prob. 2.1PCh. 2 - Prob. 2.2PCh. 2 - Prob. 2.3PCh. 2 - Prob. 2.4PCh. 2 - Prob. 2.5PCh. 2 - Prob. 2.6PCh. 2 - Prob. 2.7PCh. 2 - Prob. 2.8PCh. 2 - Prob. 2.9PCh. 2 - Prob. 2.10P
Ch. 2 - Prob. 2.11PCh. 2 - Prob. 2.12PCh. 2 - Prob. 2.13PCh. 2 - Prob. 2.14PCh. 2 - Prob. 2.15PCh. 2 - For a normally consolidated soil, the following is...Ch. 2 - Prob. 2.17PCh. 2 - Prob. 2.18PCh. 2 - Prob. 2.19PCh. 2 - Prob. 2.20PCh. 2 - Prob. 2.21PCh. 2 - Prob. 2.22PCh. 2 - Prob. 2.23PCh. 2 - Prob. 2.24PCh. 2 - Prob. 2.25PCh. 2 - Prob. 2.26PCh. 2 - Prob. 2.27P
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- 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/secarrow_forward4. In a consolidated-drained triaxial test on a clay that is normally consolidated, the results are as follows: O3 = 15 lb/in 2 (Aoa)f = 11 lb/in? (Aua)f = 7.2 lb/in? a) Determine the consolidated-undrained friction angle. %3D b) Calculate the drained friction angle.arrow_forwardFor a sand, given:D85 = 0.21 mmD50 = 0.13 mmD15 = 0.09 mmUniformity coefficient, Cu = 2.1Void ratio, e = 0.68Relative density = 53%Estimate the soil friction angle usinga. Eq. (2.87)b. Eq. (2.88)arrow_forward
- 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.arrow_forwardRefer to Problem 3.4. Using Eq. (3.28), determine the average relative density of the sand. Assume it is a fine sand. Use Eq. (3.13) to obtain (N1)60.arrow_forwardA sand sample in a triaxial test have the following stresses: Cell Pressure 25kpa 34kpa Axial Stress 33kpa 55kpa Pore Water pressure 12kpa 10kpa a. Compute the drained angle of internal friction. b. Determine the cohesion of the soil c. Find the angle of failure in sheararrow_forward
- PROBLEM 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_forwardRefer to Problem 3.4. Using Eq. (3.22), determine the average relative density of sand.arrow_forwardThe height of the sample sand to be tested = 20 cm and the height of the saturated sand = 16 cm. Find the bulking of sand. 1. 20% 2. 55.5% 3. 25% 4. 80%arrow_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_forwardThe maximum and minimum void ratios for sand are 0.805 and 0.501 respectively. The field density test performed on the same soil has given the following results:ρ = 1.81 g/cm3, w= 12.7 %. Assume G= 2.67. Compute the in situ void ratio. a.0.51 b.0.42 c.0.65 d.0.85arrow_forwardQuestion 33 Dry Sand H, Groundwater Table Clay H, Refer to the soil profile shown. Given H1 = 9.89 m., and H2 = 5.8 m. If the ground water table rises by 3.78 meters, determine the change in effective stress (numerical value only, in kPa) at the bottom of the clay layer. Properties of dry sand: Gs = 2.53, e = 0.63. Properties of clay: Gs = 2.75, e = 0.81. Round off to two decimal places.arrow_forward
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