A quick review of BWSL

2. BANDRA WORLI SEA-LINKBANDRA WORLI SEA LINK
Presented By
TE ( CIVIL)
Ankita Pal
SSJCET

3. INTRODUCTION
 Officially known as Rajiv Gandhi Sea Link.
 Cable-stayed bridge with pre-stressed concrete-steel viaducts.
 Links the Bandra (Western suburb) and Worli ( South Mumbai).
 Inaugurated on June 30 , 2009.
 Among the most complex & advanced construction projects
ever in India.

4.  Designed By : Sheshadri Srinivasan
(Structural engineer ,
Working in Lebanese Engineering Firm
Dar-Al-Handshah )
 Commissioned By : Maharashtra State Road Development Corporation
 Constructed By : Hindustan Construction company , India ( HCC)

5. HISTORY
 Mahim Causeway was the only link connecting westernsuburbs to island
city of Mumbai, making it highlycongested during the peak hours .
 Vehicular traffic admeasuring about 120,000 PCUtravels on the Mahim
causeway everyday and during peak hours and it takes about forty minutes to
travelfrom Mahim causeway to Worli, a distance of about 8km.

6. LOCATION

7. BASIC INFO
Official Name “ Rajiv Gandhi Setu ”
Carries 8 Lanes of Traffic
Owner MSRDC
Design Cable-stayed, Concrete-Steel precast viaducts
Total length 5.6 Km ( 3.5 miles )
Width 2 × 20 m ( 66 ft )
Highest Point 126 m ( 413 ft )
Longest Span 2 × 250 m ( 820 ft )
Vertical Clearance 20 m ( below bridge for transportation )
Foundation Type Pile Foundation
Toll System Automated 16-Lane Toll Plaza

8. Time Frame
 Estimated Time Frame : 5 years
Construction begin : June 1995
Construction end : March 2003
 Actual Time Frame : 11 years
Construction begin : October 2000
Construction End : 24 March 2010
Opened : 30 June 2009

9. BUDGET
 Estimated Cost : ₹ 665.81 Cr
 Actual Cost : ₹ 1653.25 Cr
 The Increament in project cost was due to payments of escalation ₹ 213
Cr on account of inordinate delay in completion (61 months ) .
New technical changes in the bridge at the behest of new consultant₹70 Cr
.
Contractor for delay in award of work ₹ 125 Cr .
Interest liability due to delayed completion ₹ 230 Cr .

10.  PIERS :
 The span between the piers is 50 maters .
 This distance arrived by considering optimization between foundation cost
Vs. superstructure cost .
 If the piers are wide apart then foundation cost comes down , but the
superstructure becomes heavier and its cost goes up .
 Moreover, more number of piers provide better wind resistance .

12.  CABLE WIRE
 Are also known as ‘ Parallel Wire Stay Cables ’.
 Manufactured by “Shanghai Pujiang Cable Co. Ltd” China .
 Each cable consists a group of steel wires ( 6 wires ) .
 Each steel wire has a diameter 7mm with a breaking limit of 6.28
Tones.
 Group of these wires was packed in two layers of HDPE (High
Density Poly Ethylene) material .

14.  Highly uneven and variable foundation bed
even for plane area of one pile .
 The maritime Board does not allow marine
traffic in monsoon season . Thus work was
halted Mid-May only to re-commence in
October . Effectively reducing the work
schedule to only seven month in a year .
 Needed for extra steel trusses , further
experts .
 Delay due to change in design of stray Cable
.

15. BENEFITS
 Considerable savings in travel time from 40
min to 8 min
 Estimated savings in fuel and vehicle
operating cost is around $ 16.2 million .
 Stress free driving .
 Reduced accidents and noise pollution .
 Reduction in air pollution .