USN 20CSE321

Third Semester M.Tech. Degree Examination, July/August 2022

Design Concepts of Substructures
Time: 3 hrs. Max. Marks: 100
Note: 1. Answer any FIVE full questions, choosing ONE full question from each module.
2. Use of IS code 6403, 2911 and 1498 permitted.
2. Any revealing of identification, appeal to evaluator and /or equations written eg, 42+8 = 50, will be treated as malpractice.

Module-1
1 a. What is subsurface Exploration? What are the objectives of subsurface exploration?
(10 Marks)
b. What are the General requirements of foundation? Explain. (10 Marks)

OR
2 a. Classify the different types of foundations; explain any two types of shallow foundations.
Important Note : 1. On completing your answers, compulsorily draw diagonal cross lines on the remaining blank pages.

(10 Marks)
b. Explain briefly standard penetration test with a neat sketch. (10 Marks)

Module-2
3 a. With a neat sketch, explain the different modes of shear failures in the shallow foundation.
(10 Marks)
b. Explain briefly with a neat design of footings layered soils (10 Marks)

OR
4 a. Describe briefly the classification of foundation settlement. (10 Marks)
b. Explain briefly with a neat sketch plate load test. (10 Marks)

Module-3
5 a. What is Raft foundation? Explain briefly the types of Raft foundation. (10 Marks)
b. What are assumptions made in the conventional method of raft foundation design? (10 Marks)

OR
6 a. Explain briefly the soil structure interaction with types. (10 Marks)
b. Explain the various steps involved in the design of a strap footing. (10 Marks)

Module-4
7 a. Define Deep foundation. Explain briefly the classification of Deep foundation
b. Describe briefly the classification of pile foundation.

8 a. With a neat sketch, explain negative skin friction.

b. Write a short note on : i) Efficiency of pile group ii) Settlement piles.

Module-5
9 a. Describe briefly the construction of a pneumatic caisson with a neat sketch.
b. What are the components of well foundation? Explain the neat sketch.

10 a. Explain briefly forces on tower foundation.

b. Describe briefly the selection of foundation for towers.)

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