Civil Engineering - Soil Mechanics and Foundation Engineering - Discussion

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.

I think the answer given here is right,

See the problem here, asks about lateral pressure that is major stress and not active or passive earth pressure intensities. As per Bell's Formula on stresses,

P1 = P3* tan^2(α) + 2C*tan(α)

Hence here P1 i.e. Lateral Stress is directly proportional to the angle of internal friction.

Agree, B is the correct option.

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.

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.

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

I think the answer B is the right answer.

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

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.

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.