1. 1 | P a g e
A PROJECT REPORT ON
CONSTRUCTION OF FLYOVER
For
Bihar Rajya Pul Nirman Nigam Ltd.
Guided by:-
Mr. ARVIND KUMAR
PROJECT ENGINEER
Submitted By:-
RAVI MEHTA
12BCL1064
VELLORE INSTITUTE OF TECHNOLOGY
B.Tech. Civil Engineering

2. 2 | P a g e
Acknowledgements
A vocational training is a golden opportunity for learning and self-
development. I consider myself very lucky and honored to have so many
wonderful people lead me through in completion of this project.
My grateful thanks to Mr. ARVIND KUMAR, Project Engineer who in spite of
being extraordinarily busy with his duties, took time out to hear, guide and
keep me on the correct path. I do not know where I would have been without
him. A humble ‘Thank you’ Sir.
I also want to thanks all the staff members of Bihar Rajya Pul Nirman Nigam
Ltd. and S. P. Singla Constructions Pvt. Ltd who were there during my
training period. They were really very helpful throughout.
Last but not the least there were so many who shared valuable information
that helped in the successful completion of this project report.
RAVI MEHTA

3. 3 | P a g e
CONTENTS
 INTRODUCTION
 DIFFERENT STAGES OF PROJECT
1. TOPOGRAPHIC SURVEY AND ANALYSIS
2. TRAFFIC SURVEY AND ANALYSIS
3. GEOTECHNICAL ASPECTS AND ANALYSIS
4. PLANNING & DESIGN
5. CONSTRUCTION OF FLYOVER
 EQUIPMENTS
 SITE LABORATORY
 CONCLUSION

4. 4 | P a g e
INTRODUCTION
With the urbanization, peoples throughout the state are migrating towards the
city in search of better life for their family, resulting in the crowding of the city.
With such crowd one major problem is the traffic in the city and hence chronic
jams. In order to avoid chronic traffic jams, GOVERNMENT OF BIHAR has decided
to develop the selected roads of the state. In the process the cabinet of Bihar has
approved the construction of a flyover in the station road extending up to Gandhi
Maidan in exhibition road. Actually this is the extension of ROB at G.P.O to
Chiraiyatand and Chiraiyatand to Gandhi Maidan through Bihar Rajya Pul
Nirman Nigam Ltd. (BRPNNL). The BRPNNL in turn has taken up the detail
engineering of the project through consultancy firm having vast experience in
this field. The work generally includes survey, geotechnical investigation, traffic
study and planning & design.
According to the project details, the execution of project is carried out in two
phases. Both the phases had already started.
The length of fly over is (854m +612m) and (207m+147m) ramp.

5. 5 | P a g e
DIFFERENT STAGES OF PROJECT
1. SURVEY AND ANALYSIS
Each and every civil engineering project starts with survey. There are various
stages of survey. The first step of surveying is reconnaissance Then after that
various maps of the site is studied. Only after this detail survey of proposed
project site is done.
Here in this project a detail survey of the site is done by the Total Station and
various other instruments of surveying and layout is drawn in Autocad. With
help of this total space available for construction, alignment of flyover and no.
lanes of flyover & total carriageway.
It should be noted that surveying not only plays an important role in the design
of the project but also in the execution.
2. TRAFFIC SURVEY AND ANALYSIS
The main purposes of traffic survey are: traffic monitoring, traffic control and
management, traffic enforcement, traffic forecasting, model calibration and
validating etc. The purposes of carrying out traffic volume count are designing,
improving traffic system, planning, management etc.

6. 6 | P a g e
Traffic forecast predicts the future traffic volume levels on the project road. In
this project, the flyover is designed to meet the requirements of traffic for next
25 years.
From traffic survey it was decided to design the flyover for live load for a single
lane of class 70R or 2 lanes of class-A.
3. GEOTECHNICAL ASPECTS AND ANALYSIS
It is very necessary to carry out thorough soil investigation of the site as the
whole load of the structure is ultimately taken by soil through foundation.
Feasibility, design and safety of the structure all depends upon load bearing
capacity of the soil strata at the site.
For this purpose bore holes were drilled in the ground to get information about
the sub-soil strata. Boring was done at an interval of 40m along the alignment
and depth of exploration was 34m. Samples were taken from the bore hole and
tested in the laboratory and engineering properties of the soil was investigated.
Also some field test was carried out.
From these tests & investigations, it was concluded that the Soil Bearing Capacity
(SBC) of the site was 230 MPa.
4. PLANNING & DESIGN

7. 7 | P a g e
All the results were taken into account and with help of Various IS Codes detailed
planning and design were prepared according to which execution is going
through and the flyover is under construction.
From all available data a pile was designed and Initial Load Test for pile was done
to confirm the load carrying capacity of the single pile.
TECHNICAL DATAS:-
1.CHIRAIYATAND TO GANDHI MAIDAN
Diameter Of Pile 1200mm
Vertical Load Capacity Of Pile 250T
Horizontal Load Capacity Of Pile 20T
Depth Of Pile Cap 1800mm
Number Of Piles 110
Number Of Pile Cap 19
Number Of Segment 198
Other Specifications:-
 Pile group - 4 and 6
 Segment size - 3250mm & 2350mm
 A1 to P1 – 33.25m (segmental construction, box)

8. 8 | P a g e
 P1 to P17 – 34.0m (segmental construction, box)
 P17 to A2 – 33.25m (segmental construction, box)
 Length Of Flyover – 612m elevated & 147m filled up
2. STATION TO MITHAPUR
Diameter Of Pile 1200mm
Vertical Load Capacity Of Pile 250T
Horizontal Load Capacity Of Pile 20T
Depth Of Pile Cap 1800mm
Number Of Piles 267
Number Of Pile Cap 38
Number Of Segment 182
Number Of Shaft 40
Number Of Hammer Head 37
Other Specifications:-

9. 9 | P a g e
 Pile group – 10
 P0 to P1 – 11.0m (Sor Span)
 P1 to P6 – 34.0m (segmental construction, box)
 P6 to P15 – 37.0m (segmental construction, box)
 P15 to P32 – 20.m (I-Girder)
 Length Of Flyover – 854m elevated & 207m filled up
 2x5.5 m each lane
5. CONSTRUCTION OF FLYOVER
5.1 SUBSTRUCTURE
Construction of substructure consists of
 Boring of Pile
 Steel reinforcement
 Pile capping
PILE
Piles are the most common type of deep foundation.
It safely transfers the load from superstructure to the sub surface strata by means of friction,
end bearing or combination of both.
Pile Boring Procedure:
1. Set up the Location of Bored Pile

10. 10 | P a g e
We use Total Station instrument to survey each pile point.
2.Drilling Using MAIT machine
3. Insert Casing

11. 11 | P a g e
4. Insertion of Steel Cage
5. Insert Tremie Pipe & Pouring of Concrete
PILE CAP
A pile cap is thick concrete mat that rests on piles to provide a suitable foundation.

12. 12 | P a g e
It forms the part of the foundation of structure.
This pile cap distributes the load to piles uniformly.
Pile capping Procedure
1. Shuttering and Reinforcement
2. Concreting
3. Curing
DESIGN AND SPECIFICATIONS OF FOUNDATION
 Pile foundation with pile cap
 No. of piles – 4 for Abutments & 6 for piers
 M35 Grade Concrete is used for casting piles & pile cap
 Depth of pile 25000 mm & Dia of pile 1200 mm
 Depth of pile cap is 1800 mm
 Bars used – Fe 500 Tor Steel Bar of Dia 28 mm & Dia 32 mm
 Sand filling is done around pier caps to control & minimize expansion & contraction
of structure and sand is economical also

13. 13 | P a g e
5.2 SUPERSTRUCTURE
Two important parts of superstructure are:-
 PIERS
 DECKS
PIER
The dimensions and construction details of the cast-in-situ piers are given below
 Every single pier consists of Reinforcement bars of different dia (max upto 32mm)
 Casted by using M35 grade Concrete
 Internal vibrators are used for compaction of concrete
DECK

14. 14 | P a g e
A fly over deck or road bed is the roadway or the pedestrian walkway surface of a fly over.The
deck of fly over in our case is made segmental construction of the smaller segments and the
combining together at site using cranes by methods of post-tensioning.
At S. P. Singla Constructions Pvt. Ltd., we are always striving to bring on board the latest of
technologies and equipment to meet the demands of today's clients. While listed above are
few of the technologies we are presently working with, in near future we will be adding more
to our list. The technologies are updated time-to-time to deliver today what others hope to
do tomorrow. The latest equipment and machinery we use ensures us excellent results.
Increasing our capacity with standard equipment has helped us extend our reach far and
wide. Meeting every demand of the client, acquiring modern equipment and setting
standards with superior quality delivery of work, S.P. Singla Constructions Pvt. Ltd. is racing
ahead.
Air Compressor Backhoe Loader

15. 15 | P a g e
Boom Placer Pump Cantilever Gantry Crane
Concrete Batching Plant Concrete Pump
Crawler Crane Excavator
Genset Goliath Gantry Crane

16. 16 | P a g e
Hydraulic Rig Machine Hydraulic Crane
Hydraulic Operated R.C.D. self propelled piling Rig Machine Mini Roller

17. 17 | P a g e
Mixer Machine Ordinary Mixer Machine
Pneumatic Rock Breaker Tower Crane

18. 18 | P a g e
Transit Mixture Viabratory Road Roller
Vibro Hammer Virtical Lifting Gantry
Wheel Loader Mastic Cooker

19. 19 | P a g e
CONCLUSION
After the completion of this project, flyovers would benefit the commutators going
to kankarbagh, Gandhi Maidan area from Mithapur Bus stand. Anyone can travel
from R Block to Gandhi Maidan without facing heavy traffic jam in between.
This project will prove a great asset to mankind as it will prevent chronic jams in
traffic gridlock in areas like New Market, Patna Junction & Exhibition Road and
hence will save considerable amount of fuel & time.
***************************************THANKS***************************************