PPSC CE Quiz 6
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1) Coulombs theory of earth pressure is preferred for designing a masonry gravity retaining wall.
2) It is the graphical method in a simplified version of the more general trial wedge theory.
3) Plastic equilibrium in the active case is more than the positive case if the yield of a retaining wall required to reach is higher.
(i) The failure surface is in the shape of arc of a circle.
(ii) The resultant is tangential to friction circle
(iii) The resultant passes through the centre of the friction circle.
(iv) Friction is fully mobilized.
(i) is a dimensionless quantity
(ii) is derived from friction circle method
(iii) Depends upon height and inclination of slope only
(iv) can be derived for both homogeneous and stratified soil
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