All India Civil Engineering (CE) Group

The assumption of Boussinesq equation is that the soil is _____
  • a)
    non-homogeneous
  • b)
    homogeneous
  • c)
    plastic
  • d)
    semi-plastic
Correct answer is option 'B'. Can you explain this answer?

Pioneer Academy answered  •  7 hours ago
Boussinesq solved the problems of stress distribution in soils due to a concentrated loads acting at the ground surface. The assumptions made are based on theory of elasticity. Therefore, the soil is considered to be elastic and of homogeneous nature.

The Boussinesq influence factor is given by _______
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'C'. Can you explain this answer?

Pioneer Academy answered  •  7 hours ago
The Boussinesq influence factor is given by,  where the K= Boussinesq influence factor which is a function of r/z ratio which is a dimensionless factor.

The assumption of Boussinesq equation is that the soil is ____
  • a)
    semi-infinite
  • b)
    infinite
  • c)
    finite
  • d)
    semi- finite
Correct answer is option 'A'. Can you explain this answer?

Gate Funda answered  •  7 hours ago
Semi-infinite condition is when one of the dimension extends to infinity. If XY pane is considered to be ground surface and the z-axis as depth, then this condition is known as semi-infinite.

The total settlement of a footing in clay is considered to be consisting of ___________ components.
  • a)
    One
  • b)
    Three
  • c)
    Two
  • d)
    Four
Correct answer is option 'B'. Can you explain this answer?

Gate Funda answered  •  7 hours ago
According to Skempton and Bjerrum, the total settlement of a footing in clay may be considered to consist of three components
S = Si + Sc + Ss.

The problems due to stress distribution in soils due to a concentrated load was studied by ______
  • a)
    G.B Airy
  • b)
    Terzaghi
  • c)
    Darcy
  • d)
    Boussinesq
Correct answer is option 'D'. Can you explain this answer?

Gate Funda answered  •  7 hours ago
Boussinesq in 1885 studied and solved the problems of stress distribution in soils due to a concentrated loads acting at the ground surface. Darcy gave the law of flow of water through soils. The stress function was introduced by G.B Airy in 1862.

The Boussinesq equation representing the tangential stress is ____
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'C'. Can you explain this answer?

Gate Funda answered  •  7 hours ago
Boussinesq showed that the polar radial stress is given by, 
Boussinesq’s tangential stress σz is given by,
 where, τrz is the tangential stress
Q is the point load acting at the ground surface
r is the radial horizontal distance
z is the vertical distance.

The Boussinesq equation representing the polar radial stress is ______
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'B'. Can you explain this answer?

Gate Funda answered  •  7 hours ago
Boussinesq showed that the polar radial stress is given by,  where σR is the polar radial stress
cosβ = (z/R)
R is the polar radial coordinate = √(r2+z2).

The assumption of Boussinesq equation is that the soil is ______
  • a)
    elastic
  • b)
    semi-elastic
  • c)
    plastic
  • d)
    semi-plastic
Correct answer is option 'A'. Can you explain this answer?

Gate Gurus answered  •  7 hours ago
Boussinesq solved the problems of stress distribution in soils due to a concentrated loads acting at the ground surface. The assumptions made are based on theory of elasticity. Therefore, the soil is considered to be elastic.

The assumption made by Boussinesq in the solutions is by the ______
  • a)
    theory of plasticity
  • b)
    theory of elasticity
  • c)
    yield point
  • d)
    failure point
Correct answer is option 'B'. Can you explain this answer?

Gate Gurus answered  •  7 hours ago
Boussinesq in 1885 studied and solved the problems of stress distribution in soils due to a concentrated loads acting at the ground surface, by assuming a suitable stress function. The assumptions made are based on theory of elasticity.

The Boussinesq equation representing the vertical stress is ______
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'C'. Can you explain this answer?

Gate Gurus answered  •  7 hours ago
Boussinesq showed that the polar radial stress is given by, 
Boussinesq’s vertical stress σz is given by, σz = σRcos2 β
 where, σz is the vertical stress
Q is the point load acting at the ground surface
r is the radial horizontal distance
z is the vertical distance.
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