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Geotechnical Engineering Question Paper - Jun 17 - Civil Engineering (Semester 3) - Pune University (PU)
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Geotechnical Engineering - Jun 17
Civil Engineering (Semester 3)
Total marks: 50
Total time: 2 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.
1.a.
Explain weathering and distinguish between mechanical and chemical weathering giving examples
(6 marks)
00
1.b.
Explain in brief six factors affecting permeability of soils.
(6 marks)
00
Or
2.a.
Define and mention the formula for the following terms: void radio, porosity, degree of saturation, percentage air voids, water content, specific gravity.
(6 marks)
00
2.b.
State Darcy's law. Define coefficient of permeability and derive equation for coefficient of permeability using constant head method
(6 marks)
00
3.a.
In a standard proctor test the following observation were recorded:
(7 marks)
00
3.b.
Explain direct shear test with respect to the drainage and loading conditions.
(6 marks)
00
Or
4.a.
Write any four assumption made by Boussinesq to evaluate the stress at a point inside the soil mass due to a point load. Also explain in brief stress Isobar
(7 marks)
00
4.b.
Define total and effective stress. determine the shear strength in terms of effective stress on a plane within a saturated soil mass at a point where the total normal stress is 200 kN/m² and phi' = 39°
(6 marks)
00
5.a.
Differentiate between Rankine's and Coulomb's theories of Earth pressure
(6 marks)
00
5.b.
Explain Active, Passive Earth pressure with respect to wall movements with sketches.
(6 marks)
00
Or
6.a.
Derive the expression for the active state of pressure at any point for the submerged cohesionless backfill along with pressure diagrams.
(6 marks)
00
6.b.
Discuss Culmann's graphical method for the determination of active Earth pressure.
(6 marks)
00
7.a.
Write a short note on causes and remedial measures of Landslides.
(7 marks)
00
7.b.
Derive the expression for factor of safety for dry infinite slope and submerged infinite slope in Sandy soils.
(6 marks)
00
Or
8.a.
Discuss sources and types of ground contamination.
(6 marks)
00
8.b.
Explain how soil acts as a geochemical trap and state the various remediation techniques
(7 marks)
00
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