Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Chapter 13, Problem 13.1CTP
To determine
Prepare a design chart by plotting the variations of
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Three samples of loose sand were tested under consolidated undrained conditions. The failure stresses and excess pore water pressure for the soil sample is given below:
Cell pressure = 212 kpa
Deviator stress = 128 kpa
Pore water pressure = 81 kpa
Determine the drained angle of inclination of failure plane in degrees.
This question is in Advanced Soil Mechanics
A sand sample with = 1.95, λ = 0.04, M = 1.4, is consolidated in triaxial apparatus under
axial stress = 200 kPa and radial stress or = 50 kPa then sheared under standard triaxial test.
If the specific volume before shear is vo= 1.73. What will be the undrained shear strength of
sand and the magnitude of backwater pressure so that the water will not cavitate during
undrained failure.
Q-2: Following are the results of four drained direct shear tests on an over consolidated clay:
Diameter of specimen = 50 mm
Height of specimen = 25 mm
Test no.
1
2
3
4
Normal force (N)
150
250
350
550
Shear force at failure (N)
157.5
199.9
257.6
363.4
Determine shear strength parameters by plotting graph
Chapter 13 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
Ch. 13 - Prob. 13.1PCh. 13 - Prob. 13.2PCh. 13 - Prob. 13.3PCh. 13 - Prob. 13.4PCh. 13 - Prob. 13.5PCh. 13 - Prob. 13.6PCh. 13 - Prob. 13.7PCh. 13 - Prob. 13.8PCh. 13 - Prob. 13.9PCh. 13 - Prob. 13.10P
Ch. 13 - Prob. 13.11PCh. 13 - Prob. 13.12PCh. 13 - Prob. 13.13PCh. 13 - Prob. 13.14PCh. 13 - Prob. 13.15PCh. 13 - Prob. 13.16PCh. 13 - Prob. 13.17PCh. 13 - Prob. 13.18PCh. 13 - Prob. 13.19PCh. 13 - Prob. 13.20PCh. 13 - Prob. 13.21PCh. 13 - Prob. 13.22PCh. 13 - Prob. 13.23PCh. 13 - Prob. 13.24PCh. 13 - Prob. 13.25PCh. 13 - Prob. 13.26PCh. 13 - Prob. 13.27PCh. 13 - Prob. 13.1CTP
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- For a normally consolidated clay specimen, the results of a drained triaxial test are as follows: · . Chamber-confining pressure = 125 kN/m² Deviator stress at failure = 175 kN/m² Determine the soil friction angle, 'arrow_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/in2arrow_forwardParagraph Styles Q#4. The following are the results of four drained direct shear tests on undisturbed normally consolidated clay samples having a diameter of 50 mm. and height of 25 mm Test No. Normal Force (N) Shear Force at Failure (N) 1 67 23.3 2 133 46.6 44.6 132.3 3 213 4 369 Draw a graph for shear stress at failure against the normal stress and determine the drained angle of friction from the graph. (Note: Use excel for calculation and drawing the graph).arrow_forward
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