Construction of approaches for bridge across River Zuari on NH 17/ NH 66 on Panjim-Mangalore section in the state of Goa Package III
Dilip Buildcon Ltd
Scope of work
Conceptualization and detailed design of 28m wide Spine & wing superstructure
This eight-lane highway bridge over the Zuari River Goa, India, was procured through a Design-Build contract. Force SE successfully engineered the spine and wing concept of superstructure for approach viaducts.
The standard length of the span is 50m with slight variations on the obligatory portions. The deck width is 28m to facilitate movement of 6 lane traffic on the approach viaducts.
Briefing about the construction methodology of this modern system, the spine segments of 10m width are assembled either on ground support system (GSS) or launching girder and joined with epoxy and temporary prestressing for post tensioning with HT strands. Complete prestressing is applied on the spine structure and support system is released and moved to next span. With the help of wing lifters, cantilever wings are lifted and held in position for casting of cast in situ stitch joints between spine and wings. After adequate strength gain of cast in place joint, transverse prestressing is applied to complete the construction of superstructure.
The bridge work is divided into three packages. Package one consists of approach road from Bambolim to Agassaim with elevated road, package two includes the main Zuari cable stayed Bridge with two observatories and with splint carriage way and package three consists of elevated road from Verna to Cortalim and service road. The original cost for these combined projects is estimated to cost around Rs 3,300 crore