Reg No.:

06000CE305122002 Pages: 2

Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Fifth Semester B.Tech Degree Regular and Supplementary Examination December 2020

Max. Marks: 100

1 ஐ
b)
2 2)
b)
௦)
3 ஐ
b)
4 2)
b)
5 2)

Course Code: CE305
Course Name: GEOTECHNICAL ENGINEERING - 11

PARTA

Answer any two full questions, each carries 15 marks.
Explain the limitations of Boussinesq’s method of stress calculation.
A Circular area on the ground surface 8m in diameter carries a uniformly
distributed load of 511/12. Find the vertical pressure at depth 3m, 5m, 8m and
12m. Also plot the variation of stress with depth.
What are the assumptions of the Coulomb’s theory? Illustrate the concept of
the Coulomb’s active pressure in cohesionless soil.
Illustrate the use of Newmark’s influence chart
What is mean by ISOBAR? Explain the significance of Pressure bulb.
Illustrate the different type of earth pressures. Draw the plot showing the
variation of pressure intensity.
A retaining wall 10m high has sandy backfill with e=0.65 @=30° and G=2.65.
The water table is at a depth of 3m from the ground surface. Draw the earth
pressure diagram and determine the magnitude and point of application of the
total active earth pressure. Take ‏بولا‎ =9.81kN/m?.

PART 13

Answer any two full questions, each carries 15 marks.
Explain the terms (a) Ultimate Bearing capacity (b) Net Ultimate Bearing
Capacity (c) Net safe Bearing Capacity (d)Gross safe bearing Capacity (e ) Net
allowable bearing pressure
A purely cohesive soil was tested by unconfined compression. The strength
obtained was 60kN/m?. Estimate the ultimate bearing capacity for strip footing,
using Terzaghi’s theory. (Bearing capacity factor =5.7)

Explain soil improvement through Preloading method.

Duration: 3 Hours

Marks

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