Foundation engineering miscellaneous


Foundation engineering miscellaneous

Foundation Engineering

  1. Net ultimate bearing capacity of a footing embedded in a clay stratum
    1. increases with depth of footing only
    2. increases with size of footing only
    3. increases with depth and size of footing
    4. is independent of depth and size of footing

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    qu = CNc + 8DNq + 0.5 BγNγ
    For clay, Φ = 0 (pure cohesive)
    ⇒ Nq = 1, Nγ = 0
    ⇒ Qu = CNc + γD
    ∴ Qun = qu – γD
    ∴ = CNC + γD – γD = CNc

    Correct Option: D

    qu = CNc + 8DNq + 0.5 BγNγ
    For clay, Φ = 0 (pure cohesive)
    ⇒ Nq = 1, Nγ = 0
    ⇒ Qu = CNc + γD
    ∴ Qun = qu – γD
    ∴ = CNC + γD – γD = CNc


  1. Surcharge loading required to be placed on the horizontal back fill of a smooth retaining vertical wall so as to completely eliminate crack is
    1. 2c
    2. 2cka
    3. 2c√ ka
    4. 2c/√ ka

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    Surcharge load

    =
    2c
    Ka

    Correct Option: D

    Surcharge load

    =
    2c
    Ka



  1. Which of the following statements is TRUE for degree of disturbance of collected soil sample?
    1. Thinner the sampler wall, lower the degree of disturbance of collected soil sample
    2. Thicker the sampler wall, lower the degree of disturbance of collected soil sample
    3. Thickness of the sampler wall and the degree of disturbance of collected soil sample are unrelated
    4. The degree of disturbance of collected soil sample is proportional to the inner diameter of the sampling tube.

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    When the thickness of sampler wall is less, the degree of disturbance of collected sample is lower.

    Correct Option: D

    When the thickness of sampler wall is less, the degree of disturbance of collected sample is lower.


  1. Group I enlists in -situ field tests carried out for soil exploration, while Group II provides a list of parameters for sub-soil strength characterization. Match the type of tests with the characterization parameters.
    Group I
    P. Pressuremeter Test (PMT)
    Q. Static Cone Penetration Test (SCPT)
    R. Standard Penetration Test (SPT)
    S. Vane Shear Test (VST)
    Group II
    1. Menard’s modulus (Em)
    2. Number of blows (N)
    3. Skin resistance (fc)
    4. Undrained cohesion (Cu)
    1. P - 1; Q - 3; R - 2; S -4
    2. P - 1; Q - 2; R - 3; S - 4
    3. P - 2; Q - 3; R - 4; S - 1
    4. P - 4; Q -1; R - 2; S -3

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    P - 1; Q - 3; R - 2; S -4

    Correct Option: A

    P - 1; Q - 3; R - 2; S -4



  1. The contact pressure for a rigid footing resting on clay at the centre and the edges are respectively
    1. maximum and zero
    2. maximum and minimum
    3. zero and maximum
    4. minimum and maximum

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    Correct Option: D