Foundation Engg Modal Question

SET -A NOORUL ISLAM UNIVERSITY, KUMARACOIL Department of Civil Engineering Fifth Semester CV 214 FOUNDATION ENGINEERING Time : 3.0 hours Model Exam Maximum : 100 marks Answer ALL questions Assume suitable data if necessary Part A – (10 × 2 =20 Marks) 1. Define stress tensor? 2. What are the boussinesq (1885) assumptions for point loads? 3. What are assumptions in Terzaghi’s bearing capacity theory? 4. Define net ultimate bearing capacity? 5. List out the type of pile based on material used. 6. What are the types of hammer? 7. What is mean by caisson? 8. What are the types of coffer dam? 9. Define significant depth? 10. What is meant by standard penetration number, N.? Part B – (5 × 6 =30 Marks) 11.(a) Describe with neat sketch stress isobar. (Or) 11.(b) A concentrated load of 1000 kN is applied at the ground surface. Compute the vertical pressu re (i) at a depth of 4 m below the load, (ii) at a distance of 3 m at the same depth. Use Boussinesq's equation 12.(a)A square footing 2.5 m x 2.5 m is built in a homogeneous bed of sand of unit weight 20 kN/m 3 and having a angle of shearing resistance of 36 0 . The depth of footing is 1.5m below the ground surface. Calculate the safe load that can be carried by a footing with a factor of safety 3 against complete shear failure. Use Terzaghi’s analysis. For Ф = 36 0 . N c =65.4 , N q =49.4, N r =54.0 C=0 (Or) 12.(b) Describe with neat sketch bearing capacity failure. 13.(a) Describe with neat sketch on end bearing pile & friction pile. (Or) 13.(b) Describe with neat sketch on Screw pile & compaction pile. 14.(a) Describe with neat sketch cantilever sheet pile. (Or)

Foundation Engg Modal Question

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