Civil Engineering - Soil Mechanics and Foundation Engineering - Discussion

Correct option is (B) i.e. Lateral pressure on the retaining wall is *directly proportional to the depth of the soil*.

Agree, B is the correct option.

Lateral pressure on the retaining wall is directly proportional to the depth of the soil.

Option E None of the above is the correct one.

The Lateral earth pressure is directly proportional to the depth of the soil because;

P = KwH.
P proportional H.

I think the answer B is the right answer.

I think this answer is not correct because the equation is 1/2k^h^2 that's why earth pressure is directly proportional to the square of height.

Option B is right

Lateral earth pressure= k.w.h
(So directly proportional to h)

Lateral earth pressure force* = 0.5 k.w.h^2.

(It's force directly to h^2 but not pressure)

Here K depends on the angle of internal friction(θ) and retaining wall condition (active/at rest/passive).

For example At rest K = 1-sin θ.
Here lateral earth pressure and K decrease as the angle of internal friction θ increases. So lateral earth pressure is not directly proportional to the angle of internal friction.

The Lateral earth pressure is directly proportional to the depth of soil because p=kwh.
The lateral earth pressure force is directly proportional to the square of the depth of soil
P(pressure force)= area of pressure diagram = 0.5kwh^2.

Only "c " is the correct answer. Because pressure is directly proportional to the square of depth "B" is not a correct answer. And in the case of option "D" according to the active earth pressure coefficient "K " is inversely proportional to the internal angle of friction.

According to me, the right C.