Question

The lateral earth pressure on a retaining wall (a) is equal to mass of the soil retained (b) proportional to the depth of the soil (c) proportional to the square of the depth of the soil (d) proportional to the internal friction of the soil answer: option d

Answer 1

option d is the answer

Answer 2

Answer:

The correct option is b) proportional to the depth of the soil.

Explanation:

At any depth H below the soil, the lateral earth pressure is the product of the coefficient of earth pressure and the vertical stress at the point.

P = kα

Where P is the lateral earth pressure, k is the coefficient of earth pressure and α is the vertical stress at that point.

Assume that the retaining wall has height H and length L

Vertical stress at the bottom of the retaining wall is the product of the specific weight of the fluid γ and the height of the retaining wall.

α = γH

P = kγH

So the lateral earth pressure is directly proportional to the depth of the soil.

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