Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN: 9781337705028
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 3, Problem 3.23P
To determine
Find the relative density at each depth using Eq. (3.51).
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Solve 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.
Stress, kPa
8.
Following data are given for a direct shear test conducted on dry sand:
Dimension of the cylindrical specimen: diameter = 71 mm; height = 25 mm;
Normal stress 250 kN/m²; shear force at failure: 560 N. Complete the following
a) What is the orientation of the failure plane in the specimen?
b) Determine the effective stress angle of friction.
A 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 ]
Chapter 3 Solutions
Principles of Foundation Engineering (MindTap Course List)
Ch. 3 - Prob. 3.1PCh. 3 - Prob. 3.2PCh. 3 - Prob. 3.3PCh. 3 - Refer to Figure P3.3. Use Eqs. (3.10) and (3.11)...Ch. 3 - Prob. 3.5PCh. 3 - Prob. 3.6PCh. 3 - Prob. 3.7PCh. 3 - Prob. 3.8PCh. 3 - Prob. 3.9PCh. 3 - Prob. 3.10P
Ch. 3 - Prob. 3.11PCh. 3 - Prob. 3.12PCh. 3 - Prob. 3.13PCh. 3 - Prob. 3.14PCh. 3 - Prob. 3.15PCh. 3 - Prob. 3.16PCh. 3 - Prob. 3.17PCh. 3 - Prob. 3.18PCh. 3 - Prob. 3.19PCh. 3 - Prob. 3.20PCh. 3 - Prob. 3.21PCh. 3 - Prob. 3.22PCh. 3 - Prob. 3.23PCh. 3 - Prob. 3.24PCh. 3 - Prob. 3.25PCh. 3 - Prob. 3.26PCh. 3 - Prob. 3.27PCh. 3 - Prob. 3.28PCh. 3 - Prob. 3.29PCh. 3 - Prob. 3.30PCh. 3 - Prob. 3.31P
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