Target GATE & ESE 2022 (Geotechnical Engineering)

 Q.1 Consider the following statements regarding Coulomb's theory of earth pressure:

1. It is based on wedge theory of earth pressure.

2. It assumes the wall surface is smooth

3. Back face of the wall should be inclined.

Which of these statements are correct?

(a) 1, 2 and 3      (b) 1 only     (c) 2 and 3 only           (d) 3 only

Q.2  When a vertical face excavation was made in a clayey silt having density of 20 kN/m^3, it failed at a depth of excavation of 4m. What is the cohesive strength (in kN/m^2) of the soil, if its angle of internal friction was 30 degree?

(a) 23.1     (b) 20.0                (c) 11.6             (d) 10.2 

Q.3 The wall friction of retaining wall:

(a) decreases active earth pressure (AEP) but increases passive earth pressure (PEP)

(b) decreases PEP but increases AEP

(c) decreases both AEP and PEP

(d) increases both AEP and PEP

Q.4 The nature of earth pressure above dredge line behind a cantilever sheet pile wall is

(a) active        (b) passive             (c) At rest              (d) active and passive

Q.5 Assertion (A): The state of earth pressure at rest is the state of equilibrium with zero strain condition.

Reason (R): In rest condition neither the wall nor the soil moves.