Multiple choice

A smooth rigid retaining wall moves as shown in the sketch causing the backfill material to fail. The backfill material is homogenous and isotropic and obeys the Mohr - Coulomb failure criterion. The major principal stress is

  1. parallel to the wall face and acting downwards

  2. normal to the wall face

  3. oblique to the wall face acting downwards

  4. oblique to the wall face acting upwards
Reveal answer Fill a bubble to check yourself
B Correct answer

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