Geotechnical Engineering - II BEU Question Paper Solution

Geotechnical Engineering - II BEU Question Paper Solution:- In This article, I have provided the solution of Geotechnical Engineering - II BEU Previous year's question paper along with its Solution that might be a similar and high chance of coming in BEU upcoming examination. I tried to make the solutions very simple and kept the language easy so that each and every student could understand it.

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BEU PYQ (Previous Years Question) Papers

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1. Fill in the blanks (any seven):-

(a) The empirical relationship established by Skempton between the compression index (Cc) and liquid limit (WL) is ...................

(b) When the average degree of consolidation U is less than 60%, the time factor T is given by ...............

(d) In a fully saturated soil, Skempton's pore pressure parameter B becomes equal to ...................

(e) When normal stress is 100 kN/m2, the magnitude of shear stress on a principal plane is ......................

(f) ................... is a direct method of soil exploration.

(g) The minimum depth of soil exploration below a footing shall be at least .................... the width of the footing.

(h) The factor of safety is defined as the ratio of shear strength to ...................... along the surface of failure.

(i) If the Poisson's ratio of a backfill material is 0-5, the theoretical value of the coefficient of earth pressure at rest is ....................

(j) Failure of the bottom of a deep excavation in sand due to the lowering of the water level inside relative to the outside is due to the phenomenon of ....................

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2. (a) List the assumptions made in deriving Terzaghi's one-dimensional consolidation theory. Differentiate between primary consolidation and secondary consolidation.

(b) A 3 cm thick laboratory soil sample reaches 55% consolidation in 75 seconds under double-drainage conditions. Find how much time will be required for an 8-0 m thick layer in the field to reach the same degree of consolidation if it has a drainage face on one side only.

3. (a) What are the drained and undrained shear tests? Under what conditions should the drained shear strength or the undrained shear strength parameters be used? Explain.

(b) Keeping the minor principal stress constant at 200 kPa, the major principal stress on a cylindrical soil sample was increased till the failure occurred. If the cohesion and angle of internal friction of the soil were 300 kPa and 22° respectively, calculate

(i) the maximum axial stress at failure;

(ii) the shear and normal stress along the failure plane;

(iii) the angle of inclination of the failure plane.

4. (a) What is meant by an infinite slope? Derive an expression for the factor of safety of an infinite slope in cohesionless soil.

(b) The soil of a * 21 deg infinite slope is subjected to full-depth seepage. The soil properties are gamma sat =18 kN/m^ 2c' = 11kN / (m ^ 2) and phi = 15 deg Determine the limiting depth H of this soil,measured vertically.

5. (a) Explain the 'wash boring' method for drilling boreholes and the use of a 'split spoon sampler for collecting soil samples from the bore.

(b) A sampling tube has an outer diameter of 70 mm and a wall thickness of 1-6 mm. Find the area ratio of the tube and comment on the result obtained.

6. Discuss with neat sketches any two boring methods used in soil exploration.

7. (a) Explain the Swedish circle method for the analysis of stability of finite slopes.

(b) For a railway embankment, 10 m high embankment is required. The clay to be used for the embankment was found to have c=20 kN/m² and a unit weight 19 kN/m³. Compute the critical maximum side slope angle for the embankment if a hard rocky stratum was found 50 m below the ground level.

Assume phi = 0 The following values are given from Taylor's chart:

For depth factor D = 1.5 value of

8. (a) What do you understand by the active and passive earth pressure? How will you determine these in cohesive and(cohesionless soil?

(b) A cut 2 m wide and 6 m deep is proposed in dense sand with phi = 25 deg and c = 0 Sketch the suitable scheme of sheeting and bracing. Also, determine the strut load. Assume unit weight of soil is 21kN / (m ^ 3)

9. Write short notes on any four of the following:

(a) Percussion drilling

(b) Bore-hole log

(d) Friction circle method and its use

(e) Clay soils

(e) Critical height of unsupported cuts in

(f) Time factor

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Geotechnical Engineering - II BEU Question Paper Solution

1. Fill in the blanks (any seven):-

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