Two new network arch bridges are going to be constructed over Bagmati and Dhobikhola in Kathmandu. For the first time in Nepal, these state-of-art technology bridges have been planned over Bagmati River on the Maitighar-Tinkune road section and another over Dhobikhola at Bijuli Bazaar, Kathmandu.
(A computer model of network arch bridge.)
A network arch bridge is a tied arch bridge with inclined hangers that cross each other at least twice and is made from materials such as steel or reinforced concrete. The bridge does not need additional support or cables.
According to the Kathmandu Valley Road Expansion Project, the previous four-lane bridges would be replaced by the new bridge at the Maitighar-Tinkune eight-lane road section.
The bridge expected to be completed by the next year is estimated to cost Rs. 131 million for the bridge at Dhobikhola. Similar bridge over Bagmati River at Tinkune is estimated to cost Rs. 213 million and is expected to be completed in the next two years.
The design width of the bridges are 12 metres. The bridges will also have a 2-metre wide footpath on the either sides of the structure.
A 3D-model prepared in bridge design software, CSI Bridge :