Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Question
Chapter 12, Problem 12.18P
To determine
Find the undrained and drained friction angles for the soil.
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6
A consolidated-undrained tri-axial test was conducted on a normally consolidated clay sample and the results are as follows:
Chamber confining pressure = 115 kPa, Deviator stress at failure = 87 kPa, Pore Water Pressure = 56 kPa.
These results were used to determine the drained friction angle of the soil. Compute the deviator stress (kPa) at failure when the drained test was conducted with the chamber confining pressure changed to 159 kPa.
Round off to two decimal places.
Question 3
The results of two consolidated-drained test triaxial tests on a clay are given below:
Specimen No.
Chamber Pressure
Deviator Stress
220
400
105
II
210
1. Determine the angle of internal friction.
2. Determine the cohesion of the clay.
3. Determine the normal stress on the point on the failure plane of the 2"d specimen.
O Question 1: A. 26.744
O Question 1: B. 26.042
O Question 1: C. 27.871
O Question 1: D. 27.486
O Question 2: A. 10.737
O Question 2: B. 12.141
O Question 2: C. 17.372
O Question 2: D. 14.836
O Question 3: A. 317.694
O Question 3: B. 232.575
O Question 3: C. 230.306
O Question 3: D. 322.194
O O O O O O O CO
A sand sample in a triaxial test have the following stresses:
Cell Pressure
25kpa
34kpa
Axial Stress
33kpa
55kpa
Pore Water pressure
12kpa
10kpa
a. Compute the drained angle of internal friction.
b. Determine the cohesion of the soil
c. Find the angle of failure in shear
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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- A consolidated drained tri-axial test was conducted on a normally consolidated clay. The results are as follows: Chamber confining presssure = 138 kPa Deviator stress = 258 kPa a. Compute the friction angle of the soil b. Compute the normal stress at failure c. Compute the shear stress at failurearrow_forward3- For a normally consolidated clay specimen, the results of a drained triaxial test are as follows: Chamber confining pressure = 2,610 lb/ft², Deviator stress at failure = 3,655 lb/ft². Determine the soil friction angle, q'.arrow_forward9. A consolidated drained test was carried out on a sandy clay under a cell pressure of 250 kPa. A constant back pressure of 120 kPa applied throughout the test. The dimensions of the sample were 76 mm x 38 mm. Addional test data recorded at failure were: Load transducer force = 368 N 3 Measured change in volume = 2.42 x 10 m³ Axial deformation = 2.05 mm Determine the major principal stress, o, at failure. (455 kPa)arrow_forward
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