Module-1

1.a. Describe with neat sketch was boring technique to explore soil.

1.b. The following sizes of sampling tubes are available in market.

Out of these which one would you select for obtaining undisturbed Soil sample for a base hole, Apply appropriate technique to get best undisturbed sample.

2.a. Explain with neat sketch, electrical resistivity method of soil exploration.

2.b. Predict the Ground water table given the following data: Depth upon which water is boiled out 18 m. Water rise in I day = 0.95 m, II day = 0.86 m and III day = 0.78 m. use the Hvorselv's method for predicting ground water table.

Module-2

3.a. Compare Boussinesq's theory with Westergaard's theory with a logical graph analysis.

3.b. Find intensity of vertical pressure at a point 3 m directly below 25 kN point load acting on a horizontal ground surface. What will be the vertical pressure at a point 2 m horizontally away from the axis of loading and at same depth of 3 m? Use Boussinesq's equation.

4.a. Explain components of settlements.

4.b. A reinforced concrete foundation of dimensions 1.8m x 3.6m exerts a uniform pressure of 180 $\mathrm{kN} / \mathrm{m}^{2}$ on a soil mass. with E-value 45$M N / m^{2}$. Determine the value of Immediate settlement under the foundation. Take $\mu=0.3$ and $1_{\mathrm{f}}=1.0$

Module-3

5.a. Compare Coulomb's Earth pressure theory over Rankin's Earth pressure theory.

5.b. Determine the active earth pressure using Rebhann's graphical method.

6.a. Explain the procedure for determination of factor of safety using method of slices for soil.

6.b. An Embankment is inclined at an angle $35^{\circ}$ and its height 15 m. The angle of shearing resistance is $15^{\circ}$ and the cohesion interrept is 40 $\mathrm{kN} / \mathrm{m}^{2}$. The unit weight of soil is 18 $\mathrm{kN} / \mathrm{m}^{3}$. Examine the factor of safety with respect to cohesion. Consider Taylor's stability number = 0.06.

Module-4

7.a. Determine the bearing capacity of the soil by using plate load test as per IS : 1888 guidelines.

7.b. A square footing located at a depth of 1.3 m below ground has to carry a safe load of 800 kN. Predict the size of fooling which is safe against applied load. If the desired factor of safety is 3.0. Assume e = 0.55, Degree of Saturatm = 50%m G = 2.67, C = 8 $\mathrm{kN} / \mathrm{m}^{2}$. Use Terzagh's analysis for general shear failure. Assume $\phi=30^{\circ}, \mathrm{N}_{\mathrm{c}}=37.2, \mathrm{N}_{1}=22.5$ and $\mathrm{N}_{r}=19.7$

8.a. Generalize the assumption made by Terzagh's bearing capacity theory for development bearing capacity equation.

8.b. Determine the bearing capacity of the soil by using standard penetration test as per IS : 2131 guidelines.

Module-5

9.a. Classify the various type of Piles based on material and function.

9.b. Explain negative skin friction in pile foundation

10.a. Explain with a neat sketch the construction and working of under remmed pile.

10.b. Justify with a neat sketch, how static formula summarize the load transfer mechanism in pile foundations.