TYLin performed a detailed independent check of the cable-stayed bridges of the Bandra Worli Sea Link near Mumbai, India.
The Bandra and Worli Bridges are part of the Bandra Worli Sea Link. The Sea Link crosses Mahim Bay in the Arabian Sea to connect the communities of Bandra and Worli. It reduces peak travel time between the two cities from 60-90 minutes to less than 10 minutes.
The Sea Link consists of three parts, the northern and southern pre-stressed concrete-steel viaducts on either side of the cable-stayed spans. The Sea Link project included 15 kilometers of new highway.
The Bandra Bridge has two 250-meter main spans with twin concrete box girder decks. It is supported with a single tower with an overall height of 128 meters above pile cap level; supports include four planes of cable-stay in a semi-harp arrangement. Cable spacing is approximately six meters along the bridge deck.
The Worli Bridge spans include two parallel structures with 150-meter spans. A center tower, with an overall height of 55 meters, supports the superstructure above the pile cap level by means of four planes of cable-stay in a semi-harp arrangement. Cable spacing is also approximately six meters along the bridge deck.
TYLin inspected the bridge foundations, substructure, pylons, and decks. TYLin submitted check reports to support the timely construction of the project.
- This project produced the first cable-stayed bridge constructed in open seas in India.
- To address the unique geology of the seabed, the pylons have a complex geometry; the largest pylons are diamond-shaped 128-meter-high concrete towers.
- Cofferdam and tremie seal construction methods were used to build the close to 5.8-meter-deep foundations.
- The Sea Link has eight lanes, including two dedicated for buses.
- The total steel wire used to support the structures is equivalent to the circumference of the earth.