Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Question
Chapter 12, Problem 12.11P
(a)
To determine
Find the average peak friction angle of the sand.
(b)
To determine
Find the average relative density.
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Question
A sample of dry sand was tested in direct shear test apparatus under
a normal load of 72 kg. The shear load required to fail the sample was
found to be 36 kg. The angle of internal friction () will be:
SITUATION 5: A sand sample is subjected to
direct shear testing at it's (in - situ) water
content. Two tests are performed. For one of
the tests, the sample shears at a stress of 400
kPa when the normal stress is 600 kPa. From
these data,
15. Determine the value of the apparent
cohesion.
c. 230 kPa
d. 221 kPa
а. 100 kPa
b. 179 КРа
16. Determine the corresponding angle of
internal friction.
a. 22.65 degrees
b. 26.57 degrees
c. 32.54 degrees
d. 18.43 degrees
Question attached
Chapter 12 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
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- In a deposit of normally consolidated dry sand a cone penetration test was conducted. Following are the result: Depth(m) Point resistance of cone, qc (MN/m²) 1.5 2.06 3.0 4.23 4.5 6.01 6.0 8.18 7.5 9.97 9.0 12.42 Assuming the dry unit weight of sand to be 16kN/m³, estimale the average peak friction angle, ф’, fo the sand. Use ф’=tan ¯1((0.38+0.27log(qc/ σ’o))arrow_forwardShow solution. The answer must be A. 36.87 B. 14arrow_forwardSolve this problem graphically and then analytically. A CU triaxial test was performed on a dense sand specimen at a confining pressure 03=40 kPa. The consolidated undrained friction angle of the sand is =39°, and the effective friction angle is d'=34°. Calculate: (a) the major principal stress at failure, o1, (b) the minor and the major effective principal stresses at failure, o'3f and oʻır, and (c) the excess pore water pressure at failure, (Aua)f.arrow_forward
- A cone penetration test result of a deposit of normally consolidated dry sand are given below. Estimate the drained friction angle of the sand using Kulhawy and Mayne's equation. The unit weight of the sand is 100 pcf. Depth ft 5.0 10.0 15.0 20.0 25.0 30.0 45 38 42 40 Tip resistance of cone, qc psi 300 600 800 1200 1400 1800arrow_forwardA = 45 B = 40 C = 15arrow_forwardProblem # 5. The angle of friction of compacted dry sand is 37°. In a direct shear test on the sand, normal stress of 150 kN/m^2 was applied. The size of the specimen was 50mm x 50mm 30 mm (height): a. Compute the shearing stress.b. What shear force will cause will cause shear failure?c. Determine the shear stress at a depth 3m. If the void ratio of the soil is 0.60. Sp. Gr. of sand is 2.70.arrow_forward
- Mcqarrow_forwardA sample of dry sand is subjected to a tri- axial test. The angle of internal friction is 37.6°. The minor principal stress is 231 KPa. What is the deviator stress when the failure occurs in KPa?arrow_forwardQuestion 42 The results of two consolidated-drained test triaxial tests on a clay are given below: Specimen No. Chamber Pressure Deviator Stress 105 220 210 400 1. Determine the angle of internal friction. 2. Determine the cohesion of the clay. 3. Determine the normal stress on the point on the failure plane of the 2nd specimen. Question 1: A. 26.744 O Question 1: B. 26.042 Question 1: C. 27.871 O Question 1: D. 27.486 Question 2: A. 10.737 O Question 2: B. 12.141 Question 2: C. 17.372 Question 2: D. 14.836 Question 3: A. 317.694 O Question 3: B. 232.575 Question 3: C. 230.306 O Question 3: D. 322.194arrow_forward
- There is an upward flow of 0.06 ml/s through a sand sample with a coefficient of permeability 3 × 10^–2 mm/s. The thickness of the sample is 150 mm and the cross-sectional area is 4500 mm2.Determine the effective stress in N/m2 at the middle of the sample, if the saturated unit weight of the sample, is 18.9 kN/m3. a. 177.38 b. 354.75 c. 88.69 d. 709.5arrow_forwardA simple of dry sand is subjected to a triaxial test. During the test if deviator stress and cell pressure are 600 kN/m² and 200 kN/m² respectively then the angle of internal friction is: A 21.56° B 16.58° C 36.87°arrow_forwardA direct shear test, when conducted on a remolded sample of sand, gave the following observations at the time of failure: Normal load = 288 N shear load = 173 N. The cross sectional area of the sample = 36 cm.sq. 1. Determine the angle of internal friction. (Select] 2. The magnitude of the major principal stress in the zone of failure. [Select] 3. Determine the magnitude of the deviator stress if a sample of the same sand with the same void ratio as given above was tested in a tri-axial apparatus with a confining pressure of 60 kPa. ( Select ]arrow_forward
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