Bandra-Worli Sea Link Project

Submitted By:Sulakshya Gaur(121684)Aayush Mittal(121685)Harshit Thakur(121689)Rajat Bhardwaj(121696)Puneet Goyal(121699)

INTRODUCTION

Bandra Worli Sea Link(BWSL) is the civil engineering marvel spanning across the arc of Mumbai coastline .•Started in 2000•Opened in 2009

Reduces timeRegulation of trafficStress free drivingReduces accidents and noise pollution

OBJECTIVES

Use of M60 grade concreteLargest span for cable stayed bridgeDimensionsMaterial usedIndia’s first bridge in open sea conditionsAn intelligent bridge management system (IBS) provides traffic information, surveillance, monitoring and control systems.Partners involved were ultratech, TATA steel, VSL Singapore, SPCC etc.

HIGHLIGHTS

The entire project was originally conceived as one large project comprising, different components, but in order to accelerate the overall construction schedule, the project has been divided into five construction packages.

Package I: Construction of flyover over Love Grove junction at Worli.

Package II: Construction of cloverleaf interchange at Mahim intersection.

Package III: Construction of solid approach road from the Mahim intersection up to the start of the Toll Plaza on the Bandra side.

Project Overview

Package IV: Construction of Cable-Stayed Bridges together with viaduct approaches extending from Worli up to the Toll Plaza at Bandra end, Intelligent Bridge System (IBS).

Package V: Improvement to Khan Abdul Gaffar Khan Road.

Package IV is the largest and main phase of Bandra-Worli Sea Link Project. Main features of this technically challenging package are :

Cable-Stayed Bridge including viaduct approaches extending from Worli up to Toll Plaza at Bandra end.

Modern Toll Plaza.

Details of Package – IV

The work order for work of construction of BWSL bridge was issued to HCC for Rs.400.23 crore. The completion time was stated as 30 months from the date of notice to proceed with the work.

The bridge layout is categorized into three different parts:

Part 1 - North-end approach structure. Part 2 - Cable-Stayed Bridge. Part 3 - South end approach structure.

Main Bridge Structure

A modern toll plaza with 16 lanes is provided at the Bandra end. The toll plaza is equipped with a state-of-the-art toll collection system. A structure is provided at this location to house the control system for the ITS.

Toll Plaza

Engineering Challenges 1) Laying of foundation 2) Heavy spans 3) Design of concrete tower 4) ground stabilization

Challenges Encountered

Working during monsoon

Logistics

Psychological conditioning

Change in design of the bridge

Change in the contractors and the delay caused by them.

Some of the Experts Involved

Estimated savings in Vehicle Operating Costs (VOC): Rs. 100 Crores per annum.

Considerable savings in travel time (20 to 30 minutes) due to increased speed and reduced delays (23 signals avoided).

Stress free driving. Reduced accidents. Reduction in traffic on existing roads because of

traffic diversion to the Sea Link.

PROJECT BENEFITS / OTHER FEATURES

Reduction in Carbon Monoxide and Nitrogen Oxide Levels in Mahim, Dadar, Prabhadevi and Worli along existing roads.

Reduced noise pollution in Mahim, Dadar, Prabhadevi and Worli along existing roads.

No adverse effect on fisheries, marine life and livelihood of fisherman.

Landscaping along the approaches and waterfront promenade enhance the environment and add green spots to the city.

Project benefits continued..

Night Lit view of BWSL

The cost of the Bandra-Worli Sea Link Project originally (July 1999) estimated at Rs.665.81 crore was revised (August 2004) to Rs.1,306.25 crore.

Though the project was originally expected to be completed by March 2003, the expected date of completion is now stated to be April 2008.Delay were mainly due technical changes brought up by new consultants .

Conclusion Report

The Company changed the design of the Worli bridge to “Cable stay” from “Arch bridge” to align with the bridge at Bandra, a decision, which could have been taken at the initial stages itself.

Against a commitment of Rs.580 crore by way of grants, the State Government had provided only Rs.100 crore till June 2007.

The selection process of Consultant for the design and project management work was defective, as the Company did not verify the technical parameters as projected by the Consultant.

The Company did not levy Liquidated Damages amounting to Rs.12.80 crore on the Contractor (HCC) as per conditions of the contract despite wrongful stoppage of work by them for 18 months and non-achievement of milestones due to poor progress of work.

ThankYou!