A retaining wall of height $H$ with smooth vertical backface supports a backfill inclined at an angle $\beta$ with the horizontal. The backfill consists of cohesionless soil having angle of internal friction $\phi .$ If the active lateral thrust acting on the wall is $P_{a},$ which one of the following statements is TRUE?

(A) $P_{a}$ acts at a height $H / 2$ from the base of the wall and at an angle $\beta$ with the horizontal

(B) $P_{a}$ acts at a height $H / 2$ from the base of the wall and at an angle $\phi$ with the horizontal

(C) $P_{a}$ acts at a height $H / 3$ from the base of the wall and at an angle $\beta$ with the horizontal

(D) $P_{a}$ acts at a height $H / 3$ from the base of the wall and at an angle $\phi$ with the horizontal

A retaining wall of height $H$ with smooth vertical backface supports a backfill inclined at an angle $\beta$ with the horizontal. The backfill consists of cohesionless soil having angle of internal friction $\phi .$ If the active lateral thrust acting on the wall is $P_{a},$ which one of the following statements is TRUE?

(A) $P_{a}$ acts at a height $H / 2$ from the base of the wall and at an angle $\beta$ with the horizontal

(B) $P_{a}$ acts at a height $H / 2$ from the base of the wall and at an angle $\phi$ with the horizontal

(C) $P_{a}$ acts at a height $H / 3$ from the base of the wall and at an angle $\beta$ with the horizontal

(D) $P_{a}$ acts at a height $H / 3$ from the base of the wall and at an angle $\phi$ with the horizontal

1 Answer

127 votes

$P_{a}$ acts at a height $H / 3$ from the base of the wall and at an angle $\beta$ with the horizontal

127 votes

127