Construction—APAC—India—Bridges
DYNA Grip ® Stay Cables for Gujarat’s first Extradosed Bridge:
The 3 rd Narmada Bridge
In the district of Bharuch in the federal state of Gujarat in northwestern India, National Highway 8 crosses
the Narmada River. The motorway is one of the country’s most important connections linking Delhi with
the economic center of Mumbai and other economically important cities.
In order to provide relief from the heavy traffic
congestion which often occurs in this area, the
3 rd Narmada Bridge is being built. It will include
4 lanes and a pedestrian crossing and will be
used together with the existing bridge that will
remain in service.
The new, 1,344m long and 20.8m wide bridge
consists of two 96m long side spans and eight
144m long main spans. The structure will be
the first extradosed bridge in the federal state
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of Gujarat and will have the country’s longest
spans. Each of the center spans consists of 38
3.55m long precast concrete hollow box girder
segments.
At each of the pylons, there are two stay cable
planes consisting of 6 stays arranged in a fan
pattern that support the bridge deck. In total,
DSI-BRIDGECON supplied and installed 216
27.5 - 70m long DYNA Grip ® Stay Cables with
a strand tonnage of 500t. 36 Type DG-P31,
36 Type DG-P37, 72 Type DG-P43 and 72
Type DG-P55 Stay Cables were used for this
purpose.
The stay cables were anchored at the bridge
deck using DYNA Grip ® Anchorages and at
the pylons using the DYNA ® Link Anchor Box
System. In this system, the fact that the stay
cable anchorages are located outside permits
slender pylon shapes because the interior of
the pylon does not need to be accessible.