Foundation Design: Principles and Practices (3rd Edition)
Foundation Design: Principles and Practices (3rd Edition)
3rd Edition
ISBN: 9780133411898
Author: Donald P. Coduto, William A. Kitch, Man-chu Ronald Yeung
Publisher: PEARSON
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Chapter 4, Problem 4.10QPP

A series of vane shear tests have been performed on a soft clay stratum. The results of these tests are as follows:

Chapter 4, Problem 4.10QPP, A series of vane shear tests have been performed on a soft clay stratum. The results of these tests

The vane was 60 mm in diameter and 120 mm long. The soil has a liquid limit of 100 and a plastic limit of 30. Compute the undrained shear strength for each test, then develop a plot of undrained shear strength versus depth. This plot should have depth on the vertical axis, with zero at the top of the plot.

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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 downvote
Three specimens of clay having a small air-void content were tested in the shear box. Shear loading was started immediately after the application of the normal load and was completed in 8 minutes. The results are as follows: 241 117 3 3 Normal Stress (kN/m²) 145 Shear stress at failure (kN/m²) 103 Find the apparent cohesion of the clay. 337 131 Find the angle of shearing resistance of the clay. What value of c would be obtained from an unconfined compression test on the same soil?
Q-4: Soil samples have been collected from a virgin ground and sent to a NATA accredited laboratory to determine shear strength parameters. The laboratory conducted direct shear test using 100 mm X 100 mm samples and returned the following test result. Test no. 1 2 Normal stress (kPa) 100 200 Shear stress at failure (kPa) 77.74 135.47 For the given soil, determine minor principal stress when major principal stress is are 450 kPa.

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