A landmark bridge for Mumbai

Fabrication and erection of large scale precast concrete segments

Fig. 1 Relocation of the two overhead gantries, which weigh
1,200 ton each and are used for approach span erection, around the Bandra cable stay bridges with a 1,600 t barge crane.

Fig. 2 Completed precast field segment on soffit form moved by transfer cart into parking position.

Fig. 3 Delivery of a segment on a multiple axis trailor to the erection gantry over already erected part of the viaduct.

Fig. 4 Lifting of a segment of the Bandra cable stayed bridge with VSL strand lifting units.

Fig. 5 All segments for a span are suspended from overhead gantry before they are glued and stressed together.

The Bandra Worli Sealink Project in Mumbai, India, is an eight lane 3.7 km long offshore road viaduct west of the Mumbai Peninsula, which will, once completed, provide an alternative connection across the Mahim Bay between the districts of Bandra in the North and Worli in the South. This project is the first phase of the so called Western link in Mumbai, which is planned to provide an offshore bypass all the way down to Nariman Point at the Southern tip of the Mumbai peninsula. Completion is scheduled by early 2010.

The viaduct is made up of one bridge per carriageway, each of them with four traffic lanes. The bridge deck is composed of precast concrete segments. A typical segment is 18.6 m wide, 3.0 m deep and about 3 m long. It has three cores and a curved “fish belly” underside and weighs between 80 and 14 t. The viaduct consists of approach viaducts, which are continuous over four to five spans and have typical spans of 50 m, and cable stay bridges. The stay cable bridges are the Bandra twin stay cable bridge with single pylon and two 250 m spans and the Worli twin cable-stayed bridge with two pylons...