1. Project report for
K.M.D.A. PROJECT, PARK CIRCUS-ROB
FLYOVER
Prepared by RAJDIP DAS
ROLL- 14ID60R04
M.TECH - Summer Internship
R.C.G. SCHOOL OF INFRASTRUCTURE DESIGN AND MANAGEMENT
I.I.T. KHARAGPUR
2. ACKNOWLEDGMENT
Rajdip Das - Internship Project Report (L&T) 2
Mr. S.Ghosh
Mr. P.Dutta
Mr. R.Rakshit
Mr. H.Bhattacharya
Mr. Shankar Jha
3. Rajdip Das - Internship Project Report (L&T) 3
CONTENTS
Project brief............................................................................................................... 4
Pile………………………………………………………………………………………………………………………..8
Pier……………………………………………………………………………………………………………………….10
Deck Construction…………………………………………………………………………………………………13
Crash Barrier Construction………………………………………………………………………………......14
Fabrication…………………………………………………………………………………………………………….15
Heavy machineries…………………………………………………………………………………………………16
Safety…………………………………………………………………………………………………………………….17
Social responsibilities - world environment day………………………………………….....19
My internship experience ………………………………………………………………………………20
4. • Project taken up by KMDA in 2007
• Project started in 2010
• Construction started in 2012
• Projected date of project completion - 2015
• Total Project Cost – 86 crore
• Project location – Park Circus, Kolkata
PROJECT BRIEF
Rajdip Das - Internship Project Report (L&T) 4
Fig 1. Fig 2.
6. LENGTH OF THE SPAN BETWEEN PIERS
PP104 TO C3 – 35258mm X 1
C4 TO C2 – 21954mm X 2
C2 TO P18 – 32374mm X 1
P18 TO P9 – 27500mm X 9
P9 TO P8 – 70000mm X 1
P8 TO C1 – 27500mm X 8
C1 X P87 – 30126mm X 1
NUMBER OF PILES
C4 – 8 piles
C3 – 6 piles
C2 – 8 piles
P18, P17, P16 – 8 piles each
P15, P14, P13, P12, P11, P10 – 6 piles each
Rajdip Das - Internship Project Report (L&T) 6
Fig 6.
Fig 5.
8. PILE
PLAN OF THE PILE CAP ‘C4’
Diameter of the piles – 1200mm
Depth of the pile – 41metres
All dimensions are in mm
Rajdip Das - Internship Project Report (L&T) 8
Fig 8.
9. PHASES OF PILE FOUNDATION
CONSTRUCTION “C4”
1 4
5
3
6
2
1) Casing followed by boring.
2) Mud circulation mixing bentonite to
prevent collapse of the subsiding soil.
3) Cage lowering.
4) Breaking of pile head as it contains lame
concrete.
5) Shoring.
6) Reinforcement process being done for
the pile cap.
Rajdip Das - Internship Project Report (L&T)
9
Fig 10.
Fig 9.
Fig 12.
Fig 13.
Fig 14.
Fig 11.
10. PIER
1 3
42
1) REINFORCEMENT OF
THE PIER
2) SHUTTERING OF THE
PIER
3) REINFORCEMENT
AND SHUTTERING OF
THE PIER CAP
4) FINISHED PIER
CONCRETE AND PIER
CAP.
Rajdip Das - Internship Project Report (L&T) 10
Fig 15. Fig 16.
Fig 17.
Fig 18.
11. CONSTRUCTION SEQUENCE SUB-STRUCTURE
• STAGE 1 – In this stage pier is to be casted
• STAGE 2- In this stage pier cap is to be casted by providing temporary support
• STAGE 3- Total number of cables 1, 2, 3, 4, 5, 6, 7, 8.
Cable number 2,4,6 & 8 are stressed to 45MPA (28 days)
• STAGE 4- PSC girders for superstructure on 7 point connector side to be casted
excluding deck slab and crash barrier.
• STAGE 5 – In this stage deck slab for superstructure on 7 point connector side to be
casted.
• STAGE 6 – Cables 1,3,5 & 7 are stressed to 76.5% of UTS
• STAGE 7- In this stage wearing coat and crash barrier for both spans to be casted.
PARAMETERS USED FOR DESIGN
• Coefficient of friction = 0.17/radius
• Anchorage slip = 6mm
• Concrete control Mix having 28days characteristic strength of 45N/sq.mm
• Pre-stressing steel of 15.2mm Diameter
• UTS – 260.7 Kn Yield Strength – 1860 MPA
• Area – 140 Sq M.
Rajdip Das - Internship Project Report (L&T) 11
12. PIER TYPE
ECCENTRIC PIER – Used where there is space constrain
due to existing condition and built forms.
CONCENTRIC PIER – Used where space is available.
Centre line of the pile cap , pier , pier cap and deck slab
is one single line.
Rajdip Das - Internship Project Report (L&T) 12
Fig 20.
Fig 19.
13. DECK CONSTRUCTION
Precast concrete girder used
between two adjacent piers.
They are placed on the
pedestal located on top of
the pier cap.
Precast concrete
slabs laid on the
girder
Reinforcement
over the PCC
slab for the
pavement
Expansion joint
Rajdip Das - Internship Project Report (L&T) 13
Fig 22. Fig 24.Fig 23.Fig 21.
14. PHASE WISE
CONSTRUCTION OF CRASH
BARRIER
1 2
3 4 5
Rajdip Das - Internship Project Report (L&T) 14
Fig 27.
Fig 26.
Fig 28.
Fig 25.
Fig 29.
15. FABRICATION
70m span
Starting from P8 to P9
Type – Bowstring
Total weight – 354 ton (Approximate)
Parts –
• Bottom chord girder
Bottom cross girder beam
• Hanger
• Bots – 8.8 Grade ( 16 mm to 24 mm diameter)
• Top Arch
• Top chord bracing
• IS2062BO Splice plate
• Bottom chord bracing
Labor type – All skilled labor
Heavy machinery used –
Crane- RT40 crane 40 ton capacity
Hydra 50 ton capacity
Rajdip Das - Internship Project Report (L&T) 15
Fig 31.
Fig 30.
16. HEAVY MACHINERY USED
EXCAVATOR
RT40 CRANE
used for
fabrication
Hydraulic
rotary drilling
rig
Rajdip Das - Internship Project Report (L&T) 16
Fig 34.
Fig 33.
Fig 32.
17. Life line
Tag line
LIFE-LINE – In circumstances where a guard-rail cannot be provided at the same time there is
high risk of a “fall” , fall protection lifeline systems are installed as the next line of fall
protection. Lifeline systems can be used to arrest workers in the event of a fall or restrain
workers from reaching a fall hazard.
TAG-LINE – Rope attached to the beam/truss that is being lifted. The rope is used by a worker on
the ground to control the item as it swings up.
Rajdip Das - Internship Project Report (L&T) 17
Fig 35. Fig 36.
SAFETY
18. SINAGES to make public aware
about safety and changes in the
pedestrian ways due to
construction
Mesh/Net used to prevent the
materials and workers from
having a free fall
Barricades used
assure better
work
environment and
safety
Compulsory rule
for the staffs and
workers to Wear
helmet at the
construction site
to assure safety
Rajdip Das - Internship Project Report (L&T) 18
Fig 37. Fig 38.
Fig 39.
19. SOCIAL RESPONSIBILITIES - WORLD ENVIRONMENT DAY
L&T group and their employees at site are aware about the environmental degradation that is
happening all around the world. So on the world environment day they undertook a unique
initiative of planting numerous plants across the sites.
It was great initiative, where right from the senior most site engineer to the labors, everyone
took part whole heartedly.
The engineers gave speech to the labors about the environmental awareness and tried to
make them aware about the importance of the environment.
Rajdip Das - Internship Project Report (L&T) 19
Fig 40. Fig 42.Fig 41.
20. Rajdip Das - Internship Project Report (L&T) 20
I had a lifetime experience during my internship stint of two months at L&T. I was reporting at
the park circus site where a flyover construction is being executed and presently it is at the final
stage of construction and at the verge of completion.
Dedicated employees and strict work ethics are the very first thing that I have observed about L&T
during my internship. Quality and safety are two extremely important criterion for the
organization. Timely completion of work and meeting the project deadlines set by KMDA is another
parameter in which L&T is successful .
When it comes to my personal knowledge gain from the internship, I consider myself extremely
lucky to get such an opportunity to stay at the site. I became aware about the construction
procedures, heavy machineries that are being used, how work is distributed among the
subcontractors, labor policies that are untaken at the site and also the social responsibilities like
plantation of new trees on the world environment day. The precautionary measures and guidelines
of L&T ensuring safety of the workers and the employees at site is something that has amazed me.
I would like to express my gratitude to Mr. P.Dutta Sir and MR. Ghosh Sir for giving me an
opportunity to stay at the site, and last but not the least Mr. R. Rakshit Sir for helping me out at the
site in all possible ways.
RAJDIP DAS
M.TECH, INTERN
IIT KGP
My internship experience
