This document provides a project report on the Nagpur Metro Rail Corporation. It discusses the acknowledgements, abstract, introduction and methodology used for the metro project. Specifically, it outlines the proposed use of pre-cast segmental construction for viaduct superstructures and stations. It details the scope of work, construction equipment, materials, and process used for casting pre-tensioned I girders, including installation of strands, stressing, detensioning and erection. In conclusion, it states the precast structural system proved ideal for the project due to reduced construction timelines and repetitive, sturdy designs.

1. A PROJECT REPORT ON NAGPUR METRO
RAIL CORPORATION
CIVIL ENGINEERING(B.TECH)
SRM UNIVERSITY
SUBMITTED BY,
NIKHIL KUMAR
HARSHIT RAJ

2. ACKNOWLEDGMENT
Working on this project on “Nagpur Metro Rail
Corporation Limited” was a source of immense
knowledge to me. We would like to express our
sincere gratitude to Mr. Raju sir for his guidance and
valuable support out the course for this project work.
We acknowledgment with a deep sense of gratitude
for the encouragement and inspiration received from
our faculty members and colleagues .
We would also like to thanks our parents for their
love and support.

3. • Abstract
• The population of Nagpur and vehicles on road are
ever increasing leading to problems like traffic,
pollution and high fuel consumption.
• Considering all this ―THE NAGPUR METRO comes as a
huge relief for the people of Nagpur.
• There are no doubts about the social benefits of
the Nagpur metro. It will help in reducing traffic and
pollution in the city and more important save a lot of
time for the daily commuters. As a part of this project,
the Nagpur Metro has been analyzed from the
economic point of view. Considerable effort has been
put into understanding the economic viability of the
Nagpur Metro. A lot of analysis is done taking into
consideration past and present data

4. SR.NO. NAME
01 INTRODUCTION
02. METHODOLOGY
03. PRESTRESSING
04. ERACTION
05. CONCLUSION
06. REFRENCE

5. Introduction
• Nagpur is the third largest city of Maharashtra and also the
winter capital of the state. With a population of
approximately 25 lakhs. Nagpur Metropolitan Area is the 13th
largest urban conglomeration in India. It has also recently
been ranked as the cleanest city and the second greenest city
of India. In addition to being the seat of annual winter session
of Maharashtra state assembly "Vidhan Sabha", Nagpur is also
a major commercial and political center of the Vidarbha
region, It is also known as "Orange City" for being a major
trade center of oranges that are cultivated in the region.

6. METHODOLOGY
For the elevated sections it is recommended to
have pre-cast segmental construction for super
structure for the viaduct. For stations also the
superstructure is generally of pre-cast members.
The pre-cast construction will have following
advantages:-
• Reduction in construction period due to concurrent
working for substructure and superstructure.
• For segmental, pre-cast element (of generally 3.0m
length), transportation from construction depot to
site is easy and economical.

7. METHODOLOGY
Minimum inconvenience is caused to the public
utilizing the road as the superstructure launching
is carried out through launching girder requiring
narrow width of the road.
• As the pre-cast elements are cast on production
line in a construction depot, very good quality
can be ensured.
• The method is environment friendly as no
concreting work is carried at site for the
superstructure

8. Segmental box

9. CASTING OF PRE-
TENSIONED I GIRDER

10. INTRODUCTION
• Construction package Reach3 of NMRCL is
consisting of const. of 10 elevated station on
East west corridor.
• PRE-CAST I GIRDER have been proposed by
NMRCL of construction of elevated station.
The length of span varies from 13m to 16m.

11. SCOPE OF WORK
• The work comprises mainly of the following
steps:-
• A)Bed preparation , Reinforcement fixing
• B)Placing and pre-tensioning of strands
• C)Fixing of side shutters
• D)Concreting
• E)Curing of concrete
• F)De-tensioning and cutting of strand
• G)Lifting of I girder from bed and storage
• H)End treatment of cut strands

12. CONSTRUCTION EQUIPMENTS
EQUIPMENT DETAILS WITH CAPACITY Quantity
EOT GANTRY 35T 2 nos
BATCHING PLANT 30 CUM/HR 1 no.
TRANSIT MIXERS 6 CUM As req.
DC SET As req.
MONO JACK WITH POWER PACK 30 T 2 nos.
POWER PACK FOR PRESTRESSING WITH PRESSURE
GAUGE
1 nos.
DE TENSIONING HYDRAULIC JACK 250T 4 nos.

13. CONSTRUCTION EQUIPMENT
EQUIPMENT DETAIL WITH CAPACITY QUANTITY
NEEDLE VIBRATOR AS REQ.
MOULD VIBRATOR AS REQ.
GRINDER AS REQ.
HAND SPRAY PUMP AS REQ.
BAR CUTTING AND BENDING MACHINE AS REQ.
WELDING MACHINE AS REQ.
CONCRETE PUMP AS REQ.

14. MATERIAL REQUIRED
• A) CONCRETE
• Concrete as per approved methodology and
mix design m50/m20 grade with 53 grade
ordinary Portland cement for I girder
concreting .minimum cement contain for
m50/20 shall be kept as 400 kg /cum. Mix
design for m50/20 shall be as per is 10262-
2009.the target slump shall be 170 mm.

15. • B) REINFORCEMENT
• Grade of steel, length,diameter shall be
as per approved design. All
reinforcement bars shall be cleaned by
wire brush and will be applied 1 coated
cement slurry inhibitor solution.Allow it
to dry for 24 hours in set. concrete cover
blocks to insure proper concrete covering
shall be provided.

16. • C) PRESTRESSING STEEL
• Uncoated stress relieved load relaxation 7 ply
strand used as prestressing steel
• Nothing dia of strand shall be 15.2mm
• Minimum breaking strength of 260.7KN.
• Elongation shall be more then 3.5%.
• Modulus of elasticity of 195 knmm
• The testing of prestressing steel will be
conducted at source and test report will be
provided for each lot.

17. • D)DEBONDING PIPE
• De bonding of strand shall be done using rod
HDPE de bonding tube . Diameter and
material of de bonding pipe shall be as per gfc
drawing the material of pipe shall be high
density polyethylene with more then 2%
carbon black.
• Density 0.94 to 0.96 g/cm3 at 23c.
• Wall thickness minimum 2mm.
• Internal dia. minimum 20mm.

18. • INSTALLATION OF HT STRANDS
• 7-ply 15.2 dia. LRPC strands shall be used for pre
stressing no ,deposition and layout of pre tensioning
strand
• The HT strands rolls are placed at the dead end of the
bed the strand shall be pulled from the roll manually
and inserted from one end through the end plate ,
strands shall be cut they shall be threaded through the
end plated de bonding tubes and reinforcement bars
one after another .Length of de bonding pipe shall be
as per giver GFC drawing .The strand pulled for entire
length and inserted into stressing plate with the
projection for 300mm and temporarily logged by barrel
and wedge

19. • STRESSING HT STRANDS
• The sequence of stressing of strands shall be given. The
barrel and wedges shall be fixed to HT strands on both side.
The floater beam shall be rest on packing member the
stressing shall be done from one yield only using 2 nos.
single pull jack of 30 t capacity.
• Stressing operation
• Load of 2t shall be applied at stressing end remove the
slack of steel strands
• Elongation of strands shall be measured by reading the
distance travel by piston of jack
• The pressure shall be increase at regular interval of 50

20. POWER PACK

21. STRESSING END WITH SEQUENCE OF
STRANDS

22. • After reaching the desired pressure elongation
anchorage shall be blocked manually. slips if any
shall be measured accurately to arrive at net
elongation
• The stressing operation shall be carried out
simultaneously in 2 strands
• If The calculated elongation is reached before the
specific gauge pressure is obtained continue
tensioning till attaining the specific gauge pressure
• If the calculated elongation has not be reached by
at specified gauge pressure continue tensioning at
interval of 5 kg/cm2.

23. RESULT OF PRE STRESSING

24. • DE TENSIONING
• De tensioning shall be done after concrete attains
40mpa strength all the 4 jack shall be fixed in the
origin placed the jack shall be advanced till the
packing members are released and remove from its
placed
• Top strands shall be de-stress first by single pull
jacks
• All the 4 jacks shall be retracted gradually till stress
gets released in relief substantial no. of strands

25. • Span erection by gss(ground support
system)
• It has 2 type of support
• A)end support/pier support
• B)middle support
• Major items
• A)slider
• B)slider shoe
• C)PTFE
• D)grid

26. • Process of span erection
• Erection of gss
• Transportation of segment
• Lifting of segment
• Dry matching
• Gluing(epoxy glue)
• cable cutting
• Threading
• Stressing
• Span alignment and bearing

27. CONCLUSION
• In retrospect, the precast structural system and
method of construction have proven to be ideal
for this project. The various logistic and
construction problems encountered on the job
were relatively minor and quickly solved. The
structural solution adopted in Monterrey is cost
efficient, not as much through its quantities of
construction materials as through its high degree
of repetition and its simple and sturdy structures,
which proved quick and easy to erect.

28. REFERENCE