Download PTU B.Tech 2020 March Civil 6th Sem BTCE 603 Foundation Engineering Question Paper

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Roll No. [ ] [T Total No. of Pages : 02

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INSTRUCTION TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

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SECTION-A

1) Answer briefly :

1. Write briefly about displacement piles and non-displacement piles.
2. What is negative skin friction?
3. What do you understand by isobar and pressure bulb?

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4. Which type of roller is best used for compacting sub grade of high plastic clays?
5. Give complete names of soil groups : SM , GW-GM
6. How can we determine scour depth?
7. If w=40%, G=2.71. Calculate γ_s, γ_dry in KN/m³.
8. Draw typical stress strain curve for sandy soils.

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9. Distinguish between ultimate bearing capacity and safe bearing capacity.
10. Define inside Clearance and outside clearance in soil sampling.

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SECTION-B

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2. What are the advantages and disadvantages of plate load test?
3. A rectangular foundation 2m x 3m transmits a pressure of 360 kN/m² to the underlying soil. Determine the vertical stress at a point 1 meter vertically below a point lying outside the loaded area, 1 meter away from a short edge and 0.5 meter away from a long edge.
4. List the assumptions made in Terzaghi's bearing capacity theory.
5. Give the structure and characteristics of montmorillonite clay minerals.
6. For flow perpendicular to stratification in soils how is equivalent permeability calculated. Derive the relevant expressions.

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SECTION-C

7. Write short notes on the following :
   1. Zero air void line and its significance.
   2. Logarithmic time fitting method.
8. List and briefly explain the different types of machine foundations. Illustrate with neat diagrams.

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9. A 60 m high tower rests on 3 legs which form an equilateral triangle of sides 8m each. The load coming on each leg may be considered as equivalent to a 300kN point. Using Boussinesq's theory compute the vertical stress increase at a point 2m deep vertically below one of the legs.

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