SEMESTER END REGULAR EXAMINATIONS (AR19), JAN - 2022
U.G. Civil Engineering Degree Bachelor of Technology
Academic Year 2021-2022 Sem. 5th
Course Title
Course Code 19CE503
Foundation Engineering
Duration 3 Hours Maximum Marks 60 (SIXTY)
Remember % 6 Understand % 65 Apply % 18 Analyze % 11
SECTION-I (Answer all the questions)
6 x 2 = 12 Marks
No. Questions (a to f) RBT Level COs
a Write the formula for the dilatancy correction of the SPT test. Remember CO1
b What are the types of soil samples? Understand CO1
c Define earth pressure at rest. Remember CO3
d Define Allowable soil pressure. Remember CO4
e What do you mean by Punching shear failure? Understand CO5
f What do you mean by end bearing pile? Understand CO6
SECTION-II (Answer all the questions)
4 x 12 = 48 Marks
Mark
No. Questions (2 to 9) RBT Level COs
s
Explain with neat sketch Thin-walled sampler. What are
(a) Understand CO1 8M
2 its advantages?
(b) Draw a typical bore log and label it. Understand CO1 4M
OR
Explain the Swedish circle method for slope stability
(a) Understand CO2 8M
analysis.
3 What will be factor of safety for the cohesive soil infinite
(b) slope of height 6m if c’=25 kN/m2, Ф’=170 when soil is Understand CO2 4M
inclined at 100 with unit weight of soil 19 kN/m3
Derive an equation for the Active and passive earth pressures
4 Understand CO3 12M
when the backfill is Inclined for the cohesionless soils.
OR
Check the stability of a cantilever concrete retaining wall
having a stem thickness of 0.4m uniform throughout, 6.0 m
height bed block thickness 0.8m and a projection of 2.5m on
the heel side and 1.5 m on the toe side. The unit weight of the
5 wall material is 25kN/m3. The soil has a unit weight Analyze CO3 12M
of18kN/m3 and an angle of internal friction of 360. Take in to
account a uniform surcharge on the ground of 50kN/m2. The
ground level on the toe side is 1.2 m high above the base of the
wall.
A square footing of 1.8m size is placed over a sand of bulk
density20kN/m3 and a saturated density 22kN/m3 at a
depth of 1.0 m below. The angle of internal friction of
sand is 300. The Terzaghi’s bearing capacity factors
(a) Apply CO4 6M
Nc=30.14, Nq=18.4 and Nϒ=15.1. Determine the ultimate
6 bearing capacity of the soil, when
i. There is no effect of water table.
ii. when water table is at the base.
A square footing is required to carry a net load of 1200 kN.
Determine the size of the footing if the depth of foundation is
(b) Apply CO4 6M
2m. The soil is sandy with N=12. Take a factor of safety of 3.0.
The water table is very deep.Use Teng’s equation.
OR
What are the different types of shear failures and
(a) Understand CO4 8M
explain?
A rectangular footing(3mx2m) exerts a pressure of 100
7 kN/m2on a cohesive soil(Es=5x104 KN/m2 and μ=0.50).
(b) Determine the immediate settlement at the centre, Understand CO4 4M
assuming (i) The footing is flexible. Take I=1.36 (ii) The
footing is rigid Take I=1.06.
(a) Discuss various Dynamic formulae. Understand CO5 4M
A pile group consists of 9 piles of 30 cm diameter and 10
m length driven in clay. If U.C.C of clay is 200 kN/m2, γ =
20 kN/m3, as shown in Figure. Determine safe load for
the group (FoS = 3, α = 0.6).
8 (b) Apply CO5 8M
OR
Classify the types of pile foundation based on (i) Material
(a) Understand CO6 6M
used (ii) Method of installation (iii) Mode of load transfer
Determine the safe load of the pile, 30 cm diameter, is
driven into a medium dense sand (Ø= 350, γ = 21 kN/m3 ,
9
K = 1.0, tan δ = 0.70,Nq=30) for a depth of 8 m. Estimate
(b) Understand CO6 6M
the safe load, taking a factor of safety of 2.50. Also find
out the safe load when the water table rises is 2m below
the ground surface. Take γw =10kN/m3.
***********
