Answer any one question from Q1 and Q2

1 (a)
State details of all natural transportation agents for formation of soils and give one example of each category.

6 M

1 (b)
A sand deposite with specific gravity of 2.65, has bulk density of 19.20 kN/m

^{3}on the filed. Its natural moisture content is 9%. Determine the critical hydraulic gradient of the sand deposite. Take γ_{W}=9.81 kN/m^{3}.
6 M

2 (a)
Define consistency of soils and show the four states of consistency graphically with appropriate consistency limits.

6 M

2 (b)
With neat sketch explain the procedure of construction of flownet for seepage through earthen dam.

6 M

Answer any one question from Q3 and Q4

3 (a)
Explain the procedure for unconfined compression test with neat sketches.

6 M

3 (b)
Explain the process of field compaction and its control using Proctor needle.

6 M

4 (a)
State and explain the terms involved in Boussinesq? point
Load and circular load equation for vertical stress determination.

6 M

4 (b)
Define sensitivity:

A clayey sample when tested in unconfined compression, gave compressive strength of 100 kN/m

A clayey sample when tested in unconfined compression, gave compressive strength of 100 kN/m

^{2}. Specimen of same clay, with same initial condition is subjected to undrained, unconsolidated triaxial test under a cell pressure of 100 kN/m^{2}. Determine the axial stress in kN/m^{2}of failure.
6 M

Answer any one question from Q5 and Q6

5 (a)
Determine the relation for lateral earth pressure in active state for submerged cohesionless backfill.

7 M

5 (b)
Explain step by step procedure for determination of lateral earth pressure graphically by Rehbann? method with neat sketch.

6 M

6 (a)
Define the term lateral earth pressure in passive state. A wall 8 m high with a smooth vertical block retains dry cohesionless sand with γ=18 kN/m

^{3}and ϕ=30°. Determine the total lateral pressure per meter length of the wall in passive state.
7 M

6 (b)
Determine the relation for lateral earth pressure in active state for dry and cohesive bacfill.

6 M

7 (a)
Explain Taylor's stability number.

Determine the factor of safety for a cohesive soil (ϕ=0)7 m high, if its stability number is known to be 0.156. The slope material has cohesion = 25 kN/m

Determine the factor of safety for a cohesive soil (ϕ=0)7 m high, if its stability number is known to be 0.156. The slope material has cohesion = 25 kN/m

^{2}and unit weight 18.5 kN/m^{3}.
7 M

7 (b)
State and describe the zones in the contaminated soil strata below the waste dump and how is their extent determined?

6 M

8 (a)
Discuss the slope stability measures that can be adopted to avoid the occurrence of landslides.

6 M

8 (b)
What is subsurface contamination? Discuss the solidification and stabilization method for control of subsurface contamination.

7 M

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