Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 6th Sem Old 160606 Geotechnical Engineering Ii Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI (OLD) EXAMINATION ? WINTER 2018
Subject Code:160606 Date: 27/11/2018
Subject Name: Geotechnical Engineering - II
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Explain Plate load test. 07
(b) Differentiate between General shear failure and Local shear failure with neat
sketch.
07
Q.2 (a) Write short note on Active and Passive earth pressure. 07
(b) A retaining wall 10 m high retains a cohesionless soil with an angle of internal
friction 35?. The surface is level with the top of the wall. The unit weight of the
top 3 m of the fill is 1.6 t/m
3
and that of the rest is 2 t/m
3
. Find the magnitude and
application of the resultant active thrust.
07
OR
(b) What are the graphical methods available for the determination of active earth
pressure? Explain any one in detail
07
Q.3 (a) Calculate the factor of safety with respect to cohesion, of a clay slope laid at 1 in
2 to a height of 10 m, if the angle of internal friction ? = 10? ; c = 25 kN/m
2
and
? = 19 kN/m
3
. Take Sn = 0.064. What will be the critical height of the slope in
the soil?
07
(b) Discuss about stability analysis of Infinite slopes for c-? soils. 07
OR
Q.3 (a) What are the basic modes of failure of earth slopes? What are the remedial
measures to prevent failure of earth slopes?
07
(b) Discuss stability analysis of Finite slopes. 07
Q.4 (a) Explain swedish circle method of stability analysis 07
(b) Write a short note on Newmark?s influence chart. 07
OR
Q.4 (a) Enlist various geophysical methods and explain any one in detail. 07
(b) Explain in detail about the factors affecting the selection of types of foundation 07
Q.5 (a) In a 16 pile group, the pile diameter is 45 cm and center to center spacing of the
square group is 1.5 m. If c = 50 kN/m
2
, determine whether the failure would occur
with the pile acting individually, or as a group? Neglect bearing at the tip of the
pile. All piles are 10 m long. Take m = 0.7 for shear mobilization around each
pile.
07
(b) Explain various stages involved in the construction of under reamed pile
foundation
07
OR
Q.5 (a) Explain different types of piles. 07
(b) How do you estimate the group capacity of piles in sand and clay? 07
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This post was last modified on 20 February 2020