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 10.18P
To determine
Draw the three Mohr circles and plot the failure envelope in terms of effective stresses.
Calculate
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Geotechnical Engineering-2
1. In a consolidated drained triaxial test, a specimen of saturated sand failed under an deviator stress of 250 kN/m2, when the cell pressure was 100 kN/m2
i)Solve for the shear stress on the failure plane and maximum shear stress at failure?
ii)Solve for factor of safety with respect to shear strength on the plane of maximum shear stress?
ii) Illustrate by drawing the Mohr circle for the failure stress condition.
iv)Solve for ɸ′ and the theoretical inclination of the failure plane to the horizontal.
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
A consolidated drained triaxial test was conducted on a granular soil. At failure (σ1^')/(σ3^' ) = 4.0. The effective minor principal stress at failure was 100 kN/m2. Compute the principal stress difference at failure in kPa.
a. 100
b. 200
c. 300
d. 400
e. 500
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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- A series of vane shear tests have been performed on a soft clay stratum. The results of these tests are as follows: Depth (m): 4.5, 5.5, 7.0, 8.5 Torque at failure, Tf (N-m): 8.9, 10.4, 12.1, 14.2 The vane was 60 mm in diameter and 120 mm long. The soil has a liquid limit of 80 and plastic limit of 45. Find the undrained shear strength (kPa) for each test, No wrong answer Please I will downvotearrow_forwardIn a drained triaxial test on consolidated clay the stress and angle are as follows: Deviator stress is 20 1b/in2 and friction angle is 210 . Calculate the effective confining pressure at failure.? A) 21 1b/in2 B) 22.2 1b/in2 C) 25.4 1b/in2 D) 17.9 1b/in2 make it fastarrow_forwardFor any C–U- or U–U-type test, what is the magnitude of excess pore water pressure existing in the soil at shear failure is indicated from?arrow_forward
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- Describe in as much detail as you can on how rock mechanical properties are measured (experimental apparatus description) and how the failure envelope is constructed (method).arrow_forwardA consolidated tri-axial test was conducted on a normally consolidated clay. The results were as follows: Chamber confining pressure = 346 kPa, Deviator stress = 403 kPa. Compute for the shear stress on the failure plane in kPa. Round off to two decimal places.arrow_forwardA temporary excavation shown below is braced with a steel tube strut. Every morning, a misguided foreman tightens the screw mechanism on the strut "just to be safe". The stress on a soil particle at point A, just behind the wall, has been measured with pressure sensor installed by the Engineer. It now measures 40KPa. If the potential failure planes in the soil behind the wall sustain 60 degrees angles with respect to the vertical wall, determine the normal stress at point A along potential failure plane.arrow_forward
- A field vane shear test was conducted in saturated clay. The height and diameter of the vane were 101.6 mm and 50.8 mm respectively. During the test, the maximum torque applied was 0.0168 kN.m Determine the undrained shear strength of the clay? The clay soil described above has a liquid limit of 64 and a plastic limit of 29. What is the plasticity index?arrow_forwardA sample of sandy soil is known: ϕ′=32∘ Under the CD test of this sample, what is the expected angle of the failure plane with respect to the plane on which the major principal effect stress acts?arrow_forwardA consolidated drained tri-axial test was conducted on normally consolidated clay. The results were: the confining pressure is 300 kPa and the deviators stress is 300 kPa. Compute the shear stress in kPa on failure plane. a. 550 b. 119.03 c. 208.9 d. 141.42arrow_forward
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