F 06000CE363122001 Pages: 2

Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Fifth Semester B.Tech Degree Regular and Supplementary Examination December 2020

Course Code: CE363
Course Name: GEOTECHNICAL INVESTIGATION

Max. Marks: 100 Duration: 3 Hours
Graph sheets to be provided
PARTA
Answer any two full questions, each carries 15 marks. Marks
1 പ Elaborately describe the sub surface exploration programme. (10)
b) List down the objectives of soil investigation. (5)

2 9) Discuss on the guidelines laid down in 15 1892.1979 for fixing the number of (10)

boreholes and depth of exploration.

b) Illustrate the test set up for a plate load test conducted under gravity loading. (5)

3 a) Differentiate between wash boring, auger boring and percussion drilling. (10)

b) Discuss on the limitations of plate load test. (5)
PART छ

Answer any two full questions, each carries 15 marks.
4 a) Critically compare between Standard Penetration Test, Static Cone Penetration (8)
Test and Dynamic Cone Penetration Test.
b) List the various factors affecting the value of Standard Penetration Number. (7)
5 98) The observed SPT N value in a deposit of fully submerged fine silty sand was (3)
40 at a depth of 6.5 ൩. The average saturated unit weight of soil 15 19.5 kKN/m?.

Find the corrected SPT number.

b) List any two advantages of static cone penetration test. (2)
c) Differentiate between electrical profiling and electrical sounding. (5)
d) What are the advantages and disadvantages of pressure meter test? (5)

6 ௨) Explain seismic refraction test with a neat sketch. What are the limitations of (7)
seismic refraction test?

b) What is the significance of pressure meter modulus and limit pressure? Explain. (8)

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