Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 10, Problem 10.9P
To determine
Find the chamber confining pressure during the drained triaxial test.
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A triaxial shear test was performed on a well-drained sand sample. The normal stress on the failure plane and the shear stress on the failure plane, at failure were determined to be 6100 psf and 4600 psf, respectively.
a. Determine the angle of internal friction of the sand?
b. Determine the angle of the failure plane?
c. Determine the maximum principal stress?
Please answer this asap. For upvote. Thank you very much
The effective stress failure envelope of a sand can be given as σ3= σ1tan 41. A drained triaxial test was conducted on the same sand. The specimen failed when the deviator stress was 396 KPa. What was the chamber confining pressure during the test?
Problem 3:
A consolidated-drained triaxial test is carried out on a sand specimen that is subjected to 80 kN/m? confining
pressure. The vertical deviator stress was increased slowly such that there is no built-up of pore water pressure
within the specimen. The specimen failed when the addition axial stress reached 240 kN/m?. Find the friction
angle of the sand. If another identical sand specimen was subjected to 150 kN/m? confining pressure, what
would be the deviator stress at failure.
Chapter 10 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
Ch. 10 - Prob. 10.1PCh. 10 - Prob. 10.2PCh. 10 - Prob. 10.3PCh. 10 - Prob. 10.4PCh. 10 - Prob. 10.5PCh. 10 - Prob. 10.6PCh. 10 - Prob. 10.7PCh. 10 - Prob. 10.8PCh. 10 - Prob. 10.9PCh. 10 - Prob. 10.10P
Ch. 10 - Prob. 10.11PCh. 10 - Prob. 10.12PCh. 10 - Prob. 10.13PCh. 10 - Prob. 10.14PCh. 10 - Prob. 10.15PCh. 10 - Prob. 10.16PCh. 10 - Prob. 10.17PCh. 10 - Prob. 10.18PCh. 10 - Prob. 10.19PCh. 10 - Prob. 10.20PCh. 10 - Prob. 10.21PCh. 10 - Prob. 10.22PCh. 10 - Prob. 10.23PCh. 10 - Prob. 10.24CTPCh. 10 - Prob. 10.25CTP
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- 2. A triaxial shear test was performed on a well-drained sand sample. The normal stress on the failure plane and the shear stress on the failure plane, at failure was determined to be 6,300 psf and 4,200 psf, respectively. a. Determine the angle of internal friction of the sand. b. Determine the angle of failure plane. c. Determine the maximum principal stress.arrow_forwardA consolidated-undrained triaxial test was conducted on a dense sand with a chamber-confining pressure of 20 lb/in?. Results showed that o' = 24° and o = 31°. Determine the deviator stress and the pore water pressure at failure.arrow_forwardFriction angle of dry sand is 35°. In a direct shear test on this sand, a normal stress of 150kPa was applied. What shear stress will cause the failure? (a) 150kPa (b) 50kPa (c) 78kPa (d) 105kPaarrow_forward
- A triaxial shear test was performed on a well-drained sand sample. The normal stress on the failure plane and the shearing stress on the failure plane were determined to be 75kPa and 42kPa, respectively. Determine the angle of internal friction of the sand, in degrees.Determine the axial stress applied to the specimen, in kPa.arrow_forwardA series of drained tri-axial tests were carrierd aut on a specimens of a sand prepared at the same porosity and the following results wer obtained at failure All Around Pressure, kPa 50 100 Principal Stress Difference, kPa 180 285 Calculate the value of the angle of shearing resistance What is the value of coliesion, Pa The maximum principal stress in kPa for a chamber pressure of 135 kPaarrow_forwardIn a triaxial test, a specimen of saturated [normally consolidated] clay was consolidated under a chamber confining pressure of 80 kPa. The axial stress on the specimen was then increased through the allowing the drainage from the specimen. The specimen fails when 120 kPa. The pore water pressure at the time was 50 kPa. What is the consolidated undrained friction angle [phi]?arrow_forward
- A consolidated un-drained triaxial test was performed on a specimen of saturated clay with a kg chamber pressure o =2.0. At failure, cm² and the failure plane angle 0 = 57°. and (2) shear stress T on the failure surface and (3) the kg 0₁-03 2.8- cm u=1.8- cm Calculate (1) the normal stress maximum shear stress on the specimen.arrow_forwardA consolidated-drained triaxial test is carried out on a sandspecimen that is subjected to 100 kN/m2 confining pressure.The vertical deviator stress was increased slowly such thatthere is no build-up of pore water pressure within the specimen.The specimen failed when the additional axial stress reached 260 kN/m2.a. Find the friction angle of the sand.b. Another identical sand specimen is subjected to200 kN/m2 confining pressure. What would be the deviatorstress at failure?arrow_forwardA dilatometer test was conducted in a clay deposit. The groundwater table was located at a depth of 3 m below the surface. At a depth of 8 m below the surface, the contact pressure was and the expansion stress was 350 kN/m2Determine the following:a. Coefficient of at-rest earth pressure,b. Overconsolidation ratio, OCRc. Modulus of elasticity,Assume stress at a depth of 8 m to be and 95 kN/m2 , poisson ratio=0.35.arrow_forward
- A consolidated-drained triaxial test is carried out on a sand specimen that is subjected to 80 kN/m² confining pressure. The vertical deviator stress was increased slowly such that there is no built-up of pore water pressure within the specimen. The specimen failed when the addition axial stress reached 240 kN/m². Find the friction angle of the sand. If another identical sand specimen was subjected to 150 kN/m' confining pressure, what would be the deviator stress at failure.arrow_forwardA sample of dry sand is subjected to a tri- axial test. The angle of internal friction is 34.8°. The minor principal stress is 240 KPa. What is the major principal stress when the failure occurs in KPa?arrow_forwardThe angle of friction of a compacted dry sand is 37 degrees. In a direct shear test on the sand, anormal stress of 150 kN/m^2 was applied. The size of the specimen was 50mmx50mx30mm(height) SITUATION 1 a. Compute the shearing stress Your answer b. What shear force will cause shear failure? Your answer c. Determine the shear stress at a depth of 3m if the void ratio of the soil is 0.60. Gs Of sand is 2.70arrow_forward
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