Composite Rail Cum Road Bridge Across River Brahmaputra, Assam

The project involves a two level composite concrete and steel truss bridge crossing River Brahmaputra in Assam. Total length of the bridge is about 4.2 km.

The project includes:

Superstructure: The proposed new Rail cum Road Bridge carries a double track railway on the lower level and tree lane road with footways on the upper level, the concrete deck. The detailed design comprises of two typical spans:

• A standard span of 121.6 m lenth (centreline-centreline bearings) and an end span of 30.0 m length.
• Distance between centreline-centreline span truss plane is 11.0 m.
• Total height of the bridge is 12.5 m

Substructure: The substructure at every pier location comprises twin circular hollow columns (each of 3.0meter in diameter with 1.0 meter wall thickness) connected together at the top by a pier cap 7.0 m wide x 17.6 m long x 1.2m thick.

Consulting Services provided for the project include:

• Preparing of Design Basis Note
• Detailed Design for the Superstructure
• Procedures for fabrication and erection works
• Specifications for Tender documents and Operational and Maintenance Manual