Download AKTU B-Tech 6th Sem 2018-2019 RCE 061 Foundation Design Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 6th Semester (Sixth Semester) 2018-2019 RCE 061 Foundation Design Question Paper

Printed Paes:2 Sub Code: RCE 061
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B.Tech.
(SEM VI) THEORY EXAMINATION 2018-19
FOUNDATION DESIGN
T ime: 3 Hours T and Marks: 70
Note: 1. Attempt all Sections. If you require any missing data, choose suitably.
SECTION A
1. Attempt all questions in brief. 2 x 7 = 14
a. J ustify the statement ?the seismic refraction method is better than the seismic
re?ection method?.
b. Classify the pile according to their mode 0ftransfer of loads.
0. Define negative skin friction.
(1. List the different types of shallow foundation settlements
De?ne differential settlement.
Discuss in short double reamed pile.
g. State the term Local Shear failure.
SECTION B
2. Attempt any three of the following: 7 x 3 = 21
a. Discuss the different methods used for boring holes. Explain CPT test.
b. A Square footing 1.8 m X 1.8 m is placed over loose sand of density 1.6 g/cm3
and at depth of 0.8m, the angle of shearing resistance is 30?, N: 10.14, Nq=
18.4 and Ny: 15.1. Calculate the total load that can be carried by the footing.
c. A group of nine piles, 13m long and 250mm in diameter, is to be arranged in a
square form in a clay soil with an average uncon?ned compressive strength of
80 kN/mz. Work out the Centre to Centre spacing of the piles for a group
efficiency factor of 1. Neglect bearing at the tip of the piles.(0c = 0.9)
Explain the measures for recti?cation of tilts and shifts in Well foundation.
e. Discuss the properties and use of reinforced soil.
SECTION C
3. Attempt any one part of the following: 7 x 1 = 7
(a) Describe the SPT test. List the corrections used in SPT test and its need.
(b) Describe Site investigation and stages in sub surface exploration.

4.
Attempt any one part of the following: 7 x 1 = 7
(a) Explain the different components of settlement of shallow foundations. Write
the equation involved in finding immediate settlement of cohesive soils.
(b) A square footing 2 m X 2 m, is founded on a depth of 1.2 m below the surface
of a deep stratum of soft saturated clay having unit weight of 19.5 kN/m3.
The soil has undrained parameters as (bu = 00 and Cu: 25 kN/m3 (, No: 5 .7, Nq:
1 and Ny= 0) and consolidated undrained parameters (triaxial test) as q)? = 22.50
and c) = 0 ( NC: 214, Nq: 10.1 and Ny= 7.3).
Determine the ultimate bearing capacity of the foundation, (1) immediately after
the construction, and (ii) few years after construction.
Attempt any one part of the following: 7 x 1 = 7
(a) Discuss the Principles of design of Footings.
(b) In a 16 pile group, the pile diameter is 45 cm and Centre to Centre spacing of
the square group is 1.5 m. If c = 50 kN/mz, determine whether the failure would
occur with pile acting individually, or as a group? Neglect bearing at the tip of
the pile. A11 piles are 10 m long. Take m=0.7 for shear mobilized around each
pile. Assume data required, if any.
Attempt any one part of the following: 7 x 1 = 7
(a) Elaborate the different shapes and components of well foundation.
(b) Differentiate between a sheet pile and a retaining wall. List the uses of sheet
piles.
Attempt any one part of the following: 7 x 1 = 7
(a) Discuss the shallow foundation on soil with reinforcement and its design
consideration.
(b) Describe elastic models of soil behavior.