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 12, Problem 12.1CTP
To determine
Draw the stress paths for each test in the
To determine
Find the combinations of confining pressure and deviator stress applied to the triaxial specimen at O, P, and A in order to follows the stress path O-P-A.
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2. A sample of saturated clay of height 20 mm and water content 30% was tested in an
oedometer. Loading and unloading of the sample were carried out. The thickness Hf of
the sample at the end of each stress increment/decrement is shown in the table below.
o: (kPa)
H, (mm)
100
200
400
200
18.68
100
18.75
20
19.31
18.62
a. Plot the results as void ratio versus o'z (log scale).
b. Determine Cc and Cr.
A pressure force of P = 75 kN is applied to the rectangular prism shaped test sample with dimensions
a = 20 mm, b = 30 mm, c = 20 mm, within the limits of proportionality. After loading, the
measured changes in sample dimensions are Aa = -0.012 mm, Ab = 0.005 mm.
Calculate the normal stress (o,) on the prism.
Calculate the transverse strain (ɛz) and the longitudinal strain (ɛy).
Calculate the Poisson's ratio (v) and the modulus of elasticity (E) of the material.
Calculate the change in length (Ac), along the x -axis.
SOLUTION
5,The following result were obtained from a series of undrained triaxial test carried out on undisturbed samples of a
compacted soil: Each sample is originally 76mm Long and 38mm in diameter, experienced a vertical deformation 2 mm
Draw the strength envelop & Determine coulomb equation for the shear strength of the soil in terms of total stresses,
Cell pressure (kPa) Additional axial load at Failure (N)
100
350
250
400
400
500
Chapter 12 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
Ch. 12 - Prob. 12.1PCh. 12 - Prob. 12.2PCh. 12 - Prob. 12.3PCh. 12 - Prob. 12.4PCh. 12 - Prob. 12.5PCh. 12 - Prob. 12.6PCh. 12 - Prob. 12.7PCh. 12 - Prob. 12.8PCh. 12 - Prob. 12.9PCh. 12 - Prob. 12.10P
Ch. 12 - Prob. 12.11PCh. 12 - Prob. 12.12PCh. 12 - Prob. 12.13PCh. 12 - Following are the results of...Ch. 12 - Prob. 12.15PCh. 12 - Prob. 12.16PCh. 12 - Prob. 12.17PCh. 12 - Prob. 12.18PCh. 12 - Prob. 12.19PCh. 12 - Prob. 12.20PCh. 12 - Prob. 12.21PCh. 12 - Prob. 12.22PCh. 12 - Prob. 12.23PCh. 12 - Prob. 12.24PCh. 12 - Prob. 12.1CTP
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