Construction of the Multi-span Cable Stayed Bridge at Ambhora, near Nagpur, Maharashtra

The multi-span cable stayed bridge over river Wainganga near Ambhora, Maharashtra, has an overall length of 705m and deck width of 15.25m to accommodate 2 lanes of vehicular traffic and 3m+3m footpath for pedestrians. The structural arrangement of the bridge comprises 2 modules, with Module 1 of 420m and Module 2 of 280m length with span arrangements of 70m+140m+140m+70m and 70m+140m+70m respectively. The superstructure is cable stayed with RCC deck with an RCC pylon height of 30m above deck level. The pylon P3 at the center of the bridge is also proposed with Viewing Gallery 40m above deck level which is structurally independent from the main bridge. This paper discusses the construction aspects of the bridge along with the details of a special travelling formwork (form-traveller) used to enable the cantilever construction of the spans over deep waters. The Module 1 of the bridge is constructed by cantilever method for pylon P2 and anchored span method for pylon P1 and P3. The Module 2 of the bridge is constructed entirely on staging. This is one of the very few cable-stayed bridges in India where all 3 methods of construction of a cable stayed superstructure are adopted in the same bridge.