en.Wedoany.com Reported - The National High Speed Rail Corporation Limited (NHSRCL) has successfully erected an 80-meter-long steel bridge over the Anupam Overbridge in Ahmedabad for the Mumbai-Ahmedabad High-Speed Rail Project. Weighing 1,004 metric tons, the bridge was manufactured at the Zetwerk fabrication facility in Wardha, Maharashtra, under the "Make in India" initiative, before being transported to the site for installation.
This bridge is a customized solution designed to span the busy Anupam Overbridge. Unlike the standard 30- to 50-meter span-by-span construction method used for typical sections of the high-speed rail viaduct, engineers designed this 80-meter steel bridge because piers could only be placed on either side of the overbridge, allowing it to safely cross the existing structure without disrupting traffic below. The overbridge connects the Khokhra Apparel Park Metro Station to the Kankaria Lake area, and maintaining traffic flow during construction was a key priority.
The bridge measures 80 meters in length, 14 meters in height, and 14.4 meters in width. A total of 35,602 Tor-Shear Type High Strength (TTHS) bolts were used during assembly. To facilitate erection, engineers constructed a specially designed temporary launching girder measuring 10.8 meters by 140 meters and weighing nearly 1,110 metric tons. After the bridge was assembled at a height of approximately 18 meters above ground, it was longitudinally pushed using hydraulic jacks along the temporary support structure, then laterally shifted to precisely align with the high-speed rail viaduct. The bridge is also equipped with a C5 protective coating system for enhanced corrosion resistance and fitted with elastomeric bearings to improve durability and reduce vibrations. The erection was carried out during traffic closures approved by local authorities.
This erection marks a significant milestone for the Mumbai-Ahmedabad High-Speed Rail Project. Of the 17 steel bridges planned in Gujarat, 15 have now been completed. A total of 28 steel bridges are planned along the high-speed rail corridor.
