The document provides details about the Bandra-Worli Sea Link bridge project in Mumbai, India. It discusses the objectives of reducing traffic and travel time. Key aspects summarized include that it is the longest sea bridge in India at 5.6 km long, with cable-stayed towers up to 128 meters high, and construction from 2000-2010 with challenges that delayed completion. Foundations included over 50 piles up to 663 meters deep, and precast concrete segments were used for the superstructure.

2. Belagavi - 590018
Technical Seminar On
BANDRABANDRA--WORLI SEAWORLI SEA
LINKLINK
Visvesvaraya Technological University
LINKLINK
By:
KAVYA HULLUR
(USN : 2VX19CSE05)
Under the Guidance
Prof. KIRAN MALIPATIL
DEPARTMENT OF CIVIL ENGINEERING
VTU BELAGAVI. 2

4. CONTENTS
 Introduction
 Location
 Objectives
 Sequence of the project
 Characteristics
 Main components Main components
 Foundation and substructure construction
 Superstructure construction
 Cable stayed bridge
 Loading
 Conclusion
 References

5. INTRODUCTION
 The Bandra-Worli Sea Link, officially called Rajiv
Gandhi Sea Link, is a cable-stayed bridge with pre-
stressed concrete-steel viaducts on either side that
links Bandra in the Western Suburbs of Mumbai with
Worli in South Mumbai across the Mahim Bay.
 Bandra-Worli Sea Link is the longest sea bridge of
india.
 Designed By : Sheshadri Srinivasan(Structural
engineer ).
 Commissioned By : Maharashtra State Road
Development Corporation.

6. Cont..
 Constructed By : Hindustan Construction company,
India ( HCC)
 The foundation stone was laid in 1999,Construction
started on 2000, opened to the public on 30 June
2009, all eight lanes were opened on 24 March 2010.2009, all eight lanes were opened on 24 March 2010.
 The original plan estimated the cost at ₹6.6 billion to
be completed in five years but the project was
subjected to numerous public interest litigations, with
the 5 year delay resulting in the cost escalating to ₹16
billion .

7. LOCATION

8. Side view of main cable stayed Front view of main cable stayed

9. OBJECTIVES
 To reduce the traffic flow along the corridor of Mumbai.
 The sea link reduces travel time between Bandra and
Worli during peak hours from 20-30 minutes to 10
minutes.
 Estimated savings in fuel and vehicle operating cost is
around $ 16.2 million .
 Reduced accidents, noise pollution and air pollution .

11. Official Name Rajiv Gandhi Sea Link
Carries 8 lane of traffic
Design cable-stayed , concrete-steel
precast viaducts
Total length 5.6 kilometers (3.5 miles)
CHARACTERISTICS
Total length 5.6 kilometers (3.5 miles)
Width 2x20 meters (66 ft)
Height 126 meters (413 ft)
Longest span 2x250 meters (820ft)
Toll System Automated 16-Lane Toll Plaza

13. CONSTRUCTION
Foundation and Substructure
 The foundations being the most important elements of the
bridge, it’s also one of the most challenging activities at
the project due to geological conditions.
 All the Piles in the Project are vertical and cast-in-situ All the Piles in the Project are vertical and cast-in-situ
permanent steel liners and are friction and end-bearing
type of Piles.
 The foundations were designed by Lachel Felice. The
drilled shaft method construction was used to for the
shafts.

14. Process of driving piles

15.  The piles are driven with RCD Rigs mounted on the
Jack up Platforms.Construction of cofferdam followed
by the placement of tremie seal after the dewatering is
Process
required for the erection of a pile.
 Concrete produced at the Batching Plant under
controlled conditions is transported by agitator drums
on concrete barges and is placed at the required
location using Concrete Pumps.

16.  Number of Piles from P1 to P18
and P20 to P60 are 4and each are of
diameter 1500mm except for P17,
P18, P20 and P21 which has Piles
of diameter 2000mm.
 The number of Piles for P19 is 52
including both north and south
Constructed piers
including both north and south
carriageways, and the diameter for
each Pile is 2000mm.
 Lastly, P27 and P30 have 6 Piles
each of diameter 2000mm, this
includes both carriageways. The
depth of each Pile varies from
5.15m to 663.4m at P19.

17. Construction of foundation below the
cable stayed portion
RCD Drill Bit used in RCD Rigs for
foundation construction

18.  The Piers for the bridge are hollow but the Piercaps
are solid mass of concrete.Prefabricated reinforcement
cages are brought at site for the construction of the
piers and sacrificial concrete lines are installed with a
Pile cap and Pier
SUB STRUCTURE CONSTRUCTION
piers and sacrificial concrete lines are installed with a
top cover so as to create the hollow part inside them.
 Once inner liners are installed the cage is aligned in
the position and placed as requisite and concreting is
done after installing the outer form. The recess for
bearing installation is cast with Pier cap.

19. Pile Cap Reinforcement

20. Cross section of pier

21. The formwork for the Sub structure Completion of pierThe formwork for the Sub structure
construction
Completion of pier
Constructed piers

22. SUPER STRUCTURE CONSTRUCTION
Segments
 The segments are cast at a centralized pre-casting
yard using short line method of casting, which means
once a segment is casted its conjugate segment isonce a segment is casted its conjugate segment is
casted right after it so as the two of them matches.
 A typical 50m span comprises of 15 numbers of
precast segments.
 The segment weights vary from 110 tons to 140 tons
per segment. The segment length varies from 3000 mm
to 3200 mm.

23. Segment being cast and its conjugate
Segment being taken from the casting yard
to jetty

24. Top View of the Casting Yard Erection gantry

25. The details of the Erection Gantry

26. CABLE STAYED BRIDGE
Complete cable stayed bridge at Bandra-side of the Sea Link

27. Cable stayed bridge construction can be divided
among following components:
 Construction of foundation
 Construction of Tower or Pylon below deck
 Construction of Diaphragm
 Construction of Pier Table
 Construction of Tower or Pylon above deck
 Erection of Deck and Stay Cables
 Stressing of Stay Cables
 Wet Joint Construction
 Continuity PT and Grouting of Cables
 Force adjustment and fine tuning.

28.  Construction of foundation
The P19 Pylon of Bandra Worli Sea Link stands on a
foundation comprising of 52 nos. M50 Piles, each of 2m
diameters.

29.  Construction of Tower or Pylon below deck
The construction of Pylon below includes 6 lifts of M60 grade
concrete each of 3.0m and 1 lift of 3.260m. The rebar layout for
every leg is predesigned and the steel bars are being cut and bent as
per the requirements of the prefabricated reinforcement cages at the
rebar fabrication yard.
Construction process of pylon

30.  Construction of Pier Table
The Pire Table constitutes the cast-in-situ diaphragms,
adjacent segments and segments between and outside Tower
Legs.

31. Construction of Tower or Pylon above deck
The following wind speeds are
binding according to the static
calculations:
 During working and
climbing process:
Max wind speed = 70kmph
Bandra cable stayed
Max wind speed = 70kmph
 Wind speed-exceeding
70kmph:
All working and climbing
process to be stopped
 Wind speed-exceeding
100kmph:
Close formwork

32.  Erection of Deck and Stay Cables
 The deck or road bed is the roadway surface of a cable-stayed
bridge.
 Dead loads are taken to be just the weight of the precast deck
section; any reinforcing steel is assumed to be accounted for by the
increased density of the concrete.
 Density of reinforced concrete = 2400 kg/m3=24 KN/m3
 Cross-sectional deck area =7.2m2 Cross-sectional deck area =7.2m2
 Force per unit length on deck=Density × Area=24 × 7.2=172.8
KN/m
Deck Cross Section

33. Cables
 Each cable consists a group of steel wires ( 6 wires ) has a diameter
7mm with a breaking limit of 6.28 Tonnes.
 Group of these wires was packed in two layers of HDPE (High
Density Poly Ethylene) material, Six different sizes of cables were
used in the cable stayed portion. The difference between them was
only on the basis of number of steel wires in each cable. Six different
types used were of 61, 73, 85,91, 109 and 121 steel wires.
.

35. C/S of Worli cable stayed tower

36.  The cable-stayed portion of the Bandra channel is 600 meters in
overall length between expansion joints and consists of two 250-meter
cable supported main spans flanked by 50 meters conventional
approach spans. A centre tower, with an overall height of 128 meters
above pile cap level with inverted Y shape.
Worli cable stayed tower
Bandra cable stayed tower
 The cable-stayed portion of the Worli channel is 350 meters in
overall length between expansion joints and consists of one 150
meters cable supported main span flanked by two 50 meters
conventional approach spans. A centre tower, with an overall height
of 55 meters, supports the superstructure above the pile cap level
with inverted I shape.
Worli cable stayed tower

37. Loading
 Dead Loads
 Super-imposed Dead Load
 Live Traffic Loading
1. HA : HA is the combination of the effects of a
UDL over a notional lane and a knife-edge load place
at the most critical point within this lane.at the most critical point within this lane.
2. HB : HB loading takes account of a particularly
large truck placed at the most critical point along the
bridge.
 Wind Loading
 Seismic Loading
 Natural Frequency

38. Loading Calculations
Loads Factors Value
Dead 1.05 177.9kN/m
Super-imposed
Dead
1.75 178.5kN/m
HA 1.5 13.5kN/m
HB 1.3 45 units,
nominally
146.3kN per
wheel

39. CONCLUSION
 Having studied the Bandra Worli Sea Link in depth
we can appreciate that it is a worthy representation of
current bridge engineering technology and a good
example of what is possible in the current climate.
 The optimised execution of the inverted Y design of The optimised execution of the inverted Y design of
the pylon is a solution that is both aesthetically and
technically successful.
 The use of tensioning mechanisms has provided an
efficient compromise between deck sizing and costly
strengthening methods.

40. REFERENCES
 Bandra–Worli Sea Link – Wikipedia.
 Modal Analysis of Cable Stayed Bridge (Bandra-Worli Sea
Link) using ANSYS IJSRD - International Journal for
Scientific Research & Development Vol. 4, Issue 03, 2016.
 Case Study of Bandra-Worli Sea Link by K.K.Wagh Case Study of Bandra-Worli Sea Link by K.K.Wagh
Polytechnic Nashik.
 https://www.flickr.com/groups/bandra-worli-sealink/pool/