Download PTU B.Tech 2020 March Civil 7th and 8th Sem BTCE 810 Ground Improvement Techniques Question Paper

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

Total No. of Questions : 09

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B.Tech.(CE) (2012 to 2017) (Sem.-7,8)

GROUND IMPROVEMENT TECHNIQUES

Subject Code : BTCE-810

M.Code : 71869

Time : 3 Hrs. Max. Marks : 60

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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 has to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students has to attempt any TWO questions.

SECTION-A

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Q1. Answer briefly :

1. How is the bearing capacity of soil affected-by geotextiles?
2. What is the function of sand used in compaction grout?
3. Describe briefly soil nailing technique.
4. What are the merits of dynamic compaction technique?

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5. How is the depth of penetration of compaction calculated?
6. What is bio technical stabilization?
7. Name various grouting materials.
8. Define grouting.
9. What are displacement piles?

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10. What are grid rollers?

SECTION-B

Q2. List four physical characteristics of a grouting liquid relevant to engineering applications.

Q3. Enumerate the effect of soil stabilization by cooling.

Q4. How could stress history of a soil deposit affects its suitability for preloading with vertical drains?

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Q5. In geotextile testing , what is an :

1. Index test
2. Performance test
3. How can test values be made into allowable values for design by functions methods?

Q6. What are the mechanical properties of treated soils?

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SECTION-C

Q7. What are the various vibro compaction methods used for densification? Explain in detail.

Q8. What are the three basic material components required in the construction of any reinforced soil structure? Explain

Q9. A 3.5 m high and 7m wide embankment is to be built on soft ground with a basal geotextile layer. Calculate the geotextile strength and modulus required in order to prevent block sliding on the geotextile. Assume that the embankment material has a unit weight of 17 KN/m?. The angle of shearing resistance is 32° and the geotextile soil interface angle of shearing resistance is one third of that value.

NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.

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