+1 vote
in Geotechnical Engineering II by (93.7k points)
In passive state, the failure wedge shows ____________

(a) downward movement

(b) upward movement

(c) left side movement

(d) right side movement

This question was posed to me in an international level competition.

Question is taken from Earth Pressure Introduction topic in section Failure Envelopes & Earth Pressure of Geotechnical Engineering II

1 Answer

0 votes
by (243k points)
Right choice is (b) upward movement

Easiest explanation: In passive state of plastic equilibrium, the wall moves towards the fill because of the shearing resistance that builds up in the direction of the wall. Due to this the failure wedge shows upward movement.

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