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Test: Lateral Earth Pressures & Retaining Walls - 1


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10 Questions MCQ Test GATE Civil Engineering (CE) 2023 Mock Test Series | Test: Lateral Earth Pressures & Retaining Walls - 1

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Test: Lateral Earth Pressures & Retaining Walls - 1 - Question 1

Why are weep holes provided at the back of retaining walls?

Test: Lateral Earth Pressures & Retaining Walls - 1 - Question 2

Coulomb’s theory of earth pressure is based on

Test: Lateral Earth Pressures & Retaining Walls - 1 - Question 3

For a sand having an internal friction of 30°, the ratio of passive to active lateral earth pressure will be

Detailed Solution for Test: Lateral Earth Pressures & Retaining Walls - 1 - Question 3

Kp/Ka will be the ratio of passive to active earth pressure.

Test: Lateral Earth Pressures & Retaining Walls - 1 - Question 4

The nature of earth pressure above dredge line behind a cantilever sheet pile wall is

Detailed Solution for Test: Lateral Earth Pressures & Retaining Walls - 1 - Question 4

Test: Lateral Earth Pressures & Retaining Walls - 1 - Question 5

The critical height of an unsupported vertical cut in a cohesive soil is given by
where, C = unit cohesion
ϕ = angle of internal friction
γ = unit weight of soil

Detailed Solution for Test: Lateral Earth Pressures & Retaining Walls - 1 - Question 5

Test: Lateral Earth Pressures & Retaining Walls - 1 - Question 6

Passive pressure in soil is associated with

Detailed Solution for Test: Lateral Earth Pressures & Retaining Walls - 1 - Question 6

Passive pressure compresses soil horizontally. It occurs when the retaining wall moves towards the backfill. Active pressure stretches soil horizontally and exerts tensile force in soil layer. It occurs when the retaining wall moves away from the backfill.

Test: Lateral Earth Pressures & Retaining Walls - 1 - Question 7

Coefficient of earth pressure at rest is

Detailed Solution for Test: Lateral Earth Pressures & Retaining Walls - 1 - Question 7

Ka < K0 < Kp

Test: Lateral Earth Pressures & Retaining Walls - 1 - Question 8

To stabilise a concrete cantilever retaining wall against sliding, the ratio of sliding force to resisting force should be

Detailed Solution for Test: Lateral Earth Pressures & Retaining Walls - 1 - Question 8

Factor of safety against sliding,

∑FR = sum of the horizontal resisting forces
∑Fd = sum of horizontal driving forces.
Usually Fs ≥ 1.55
∴ Ratio of sliding force to resisting force

Test: Lateral Earth Pressures & Retaining Walls - 1 - Question 9

The pore water pressure in the capillary zone is

Test: Lateral Earth Pressures & Retaining Walls - 1 - Question 10

The maximum permissible eccentricity of a retaining wall of width B to avoid failure in tension is

Detailed Solution for Test: Lateral Earth Pressures & Retaining Walls - 1 - Question 10

qmin for an eccentrically loaded footing

for no tension, qmin > 0
or,

or,

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