## Foundation engineering miscellaneous

#### Foundation Engineering

1. Net ultimate bearing capacity of a footing embedded in a clay stratum

1. 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

 = 2c √Ka

##### Correct Option: D

 = 2c √Ka

1. Which of the following statements is TRUE for degree of disturbance of collected soil sample?

1. 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

##### 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