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In passive state, the minor principal stress σ3 is _________

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+1 vote
in Geotechnical Engineering II by (93.8k points)
In passive state, the minor principal stress σ3   is _________

(a) horizontal direction

(b) vertical direction

(c) can be both vertical and horizontal direction

(d) in no direction

I had been asked this question in homework.

This intriguing question originated from Earth Pressure Introduction topic in division Failure Envelopes & Earth Pressure of Geotechnical Engineering II

1 Answer

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by (243k points)
Correct answer is (b) vertical direction

The best explanation: In active state, the minor principal stress denoted by σ3 is in horizontal direction. While in the passive state, the minor principal stress σ3 is in vertical direction.

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