Consider the following statements in view of Coulomb's theory (wedge theory) :
1. In the case of active earth pressure, the sliding wedge moves downwards and
outwards on a 'slip surface' relative to the intact backfill.
2. In the case of passive earth pressure, the sliding wedge moves upwards and
inwards.
Which of the following option is true?
According to Coulomb's Wedge Theory, the earth pressure acting on a retaining
wall is determined by considering the equilibrium of a soil wedge bounded by the
wall, the ground surface, and a potential failure plane.
Statement 1: Correct
In the active earth pressure condition:
· The retaining wall moves away from the backfill.
· The soil wedge tends to slide downwards and outwards along the failure plane.
· The lateral earth pressure reduces until the active earth pressure condition is
reached.
· The soil wedge is considered to be in limiting equilibrium.
Therefore, Statement 1 is correct.
Statement 2: Correct
In the passive earth pressure condition:
· The retaining wall moves towards the backfill.
· The soil wedge is pushed upwards and inwards along the failure plane.
· The lateral earth pressure increases until the passive earth resistance is fully
mobilized.
· The soil wedge resists the movement of the retaining wall.
Practice more questions and improve your performance with Zone Tech.
Access live classes, recorded lectures, quizzes and test series from your mobile.
