If both the major and minor principal stresses for a soil element are known, as well as the strength parameters c'and o': A) Derive the formula that gives the orientation (the angle 0) of the theoretical failure plane. Hint: for the diagram below, assume 0₁ is acting in the vertical direction on the soil element (typical case) - i.e. the orientation of the failure plane with be measured on the Mohr's Circle from the Pole (which will be at 03). Remember a useful property of circles in terms of angles... Ko $' 03 01 0 B) Relate your answer from Part A to the failure plane assumed in Rankine's Active Earth Pressure. You can show this relationship with a simple sketch.
If both the major and minor principal stresses for a soil element are known, as well as the strength parameters c'and o': A) Derive the formula that gives the orientation (the angle 0) of the theoretical failure plane. Hint: for the diagram below, assume 0₁ is acting in the vertical direction on the soil element (typical case) - i.e. the orientation of the failure plane with be measured on the Mohr's Circle from the Pole (which will be at 03). Remember a useful property of circles in terms of angles... Ko $' 03 01 0 B) Relate your answer from Part A to the failure plane assumed in Rankine's Active Earth Pressure. You can show this relationship with a simple sketch.
Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
Publisher:Braja M. Das, Khaled Sobhan
Chapter10: Stresses In A Soil Mass
Section: Chapter Questions
Problem 10.2P
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![If both the major and minor principal stresses for a soil element are known, as well as the strength
parameters c'and o':
A) Derive the formula that gives the orientation (the angle 0) of the theoretical failure plane. Hint:
for the diagram below, assume 0₁ is acting in the vertical direction on the soil element (typical
case) - i.e. the orientation of the failure plane with be measured on the Mohr's Circle from the
Pole (which will be at 03). Remember a useful property of circles in terms of angles...
Øs
03
01
B) Relate your answer from Part A to the failure plane assumed in Rankine's Active Earth Pressure.
You can show this relationship with a simple sketch.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe24b267d-8d25-43cf-9da5-beb0d51b95de%2Fb7fd8348-4c2e-4241-8ea6-4d3fc97aa15a%2Fq7dr8c_processed.png&w=3840&q=75)
Transcribed Image Text:If both the major and minor principal stresses for a soil element are known, as well as the strength
parameters c'and o':
A) Derive the formula that gives the orientation (the angle 0) of the theoretical failure plane. Hint:
for the diagram below, assume 0₁ is acting in the vertical direction on the soil element (typical
case) - i.e. the orientation of the failure plane with be measured on the Mohr's Circle from the
Pole (which will be at 03). Remember a useful property of circles in terms of angles...
Øs
03
01
B) Relate your answer from Part A to the failure plane assumed in Rankine's Active Earth Pressure.
You can show this relationship with a simple sketch.
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