Earth Pressure Theories

Rankine’s theory of lateral earth pressure can be applied to

• Cohesion less soil

• Cohesive soil

• Fine grained soil

• Coarse grained soil

Based on the assumptions of Rankine’s theory, the soil mass is

• Stratified

• Submerged

• Homogeneous

• All of the mentioned

If the sand filled behind the retaining wall with saturated water with water, then the possible lateral pressure is

• Lateral pressure due to retaining wall

• Lateral pressure due to submerged weight and Lateral pressure due to water

• None of the mentioned

• All of the mentioned

What will be the coefficient of earth pressure at rest for a rigid retaining wall, If the backfill consists of cohesion less soil having φ = 26°?

• 0.1295

• 0.6552

• 0.5616

• 0.7383

A vertical cut is to be made in a soil mass having cohesion c, angle of internal friction φ, and unit weight γ. Considering Ka and Kp as the coefficients of active and passive earth pressures, respectively, the maximum depth of unsupported excavation is

• 2c / (γ√Kp)

• 4c / (γ√Kp)

• 4c√Ka / γ

• 4c / γ√Ka

When a retaining wall moves away from the back-fill, the pressure exerted on the wall is termed as

• Passive earth pressure

• Swelling pressure

• Pore pressure

• Active earth pressure

The earth pressure for the design of bridge abutments is taken as

• Active thrust

• Passive thrust

• Thrust in rest condition

• None of above

For the determination of earth pressure, Coulomb's wedge theory assumes that

• the back of wall is smooth and vertical

• the soil is non homogeneous and anisotropic

• the slip surface is circular

• the wall surface is rough

Coulomb's theory of earth pressure is based on

• Theory of elasticity

• Theory of plasticity

• empirical rules

• wedge theory

Cohesion in soil

• decreases active pressure and increases passive pressure

• decreases both active and passive pressure

• increases the active pressure and decreases the passive resistance

• increases both active and passive pressure