Anji Khad bridge, first cable stayed rail bridge in India

India’s Union Railway Minister, Ashwini Vaishnaw, has shared a timelapse video showcasing the construction of the Anji Khad Bridge, the country’s first cable-stayed rail bridge. With a total of 96 cables spanning a length of 653km, the bridge is part of the challenging Udampur-Srinagar-Baramulla-Rail Link (USBRL) Project in the Reasi district of Jammu and Kashmir.

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Anji Khad bridge: Key Points

● The bridge connects Katra and Reasi and required detailed geological investigations from IIT Roorkee and IIT Delhi to navigate the complex and fragile terrain of the Himalayan mountain slopes.
● Due to space restrictions on the Katra end, a special hybrid foundation was developed to stabilize the foundation of the main span.
● On the Srinagar end, the majority of the Anji Khad Bridge works were completed, including the construction of the main pylon with a 40-meter-deep hybrid foundation, the central embankment, and the ancillary viaduct.
● To simplify construction and consider typical conditions, the 725.5-meter bridge was divided into four parts: the 120-meter-long ancillary viaduct on the Reasi side, a 38-meter-long approach bridge on the Katra end.
● The main cable-stayed bridge with a length of 473.25 meters and a central span of 290 meters, and the 94.25-meter-long central embankment located between the ancillary viaduct and the main bridge, which connects tunnels T2 and T3 on the Katra-Banihal Section of the Udhampur-Srinagar-Baramulla Rail Link project.

About Anji Khad Bridge:

● The Anji Khad Bridge is supported by a single main pylon standing at a height of 331 meters above the river bed, with a height of 193 meters from the top of the foundation.
● It has an asymmetrical design, with a total deck width of 15 meters, and is supported by 96 cables with lengths ranging from 82 meters to 295 meters.
● The main pylon utilized 40-meter-deep micropiles and a 20-meter hybrid well foundation.
● Designed to withstand heavy storms with strong winds of up to 213 km/h, the Anji Khad Bridge can accommodate a single railway line and a 3.75-meter-wide service road, with a 1.5-meter-wide footpath on each side of the deck.
● To ensure worker safety and increase efficiency while saving construction time, advanced equipment such as the DOKA Jump-Form Shuttering and Pump Concreting Systems have been utilized.

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Anji Khad Bridge: Other Highlights

● To monitor the bridge’s structural health during use, numerous sensors have been installed at various locations on the bridge.
● The Italian company ITALFERR was responsible for detailed design and construction supervision, while the UK company COWI was responsible for proof-checking, based on the Indy design, started by Photo by Eurocodes.

The site-specific earthquake parameter studies were conducted by the Department of Earthquake Engineering at the Indian Institute of Technology, Roorkee, to determine the seismo-tectonic framework for the region. The line is designed to operate at a speed of 100 km/h, which does not cause any issues for the train-structure interaction.

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