Systems stabilize impressive Slopes for the World’s highest Railway Bridge

Traveling around the mountainous region of Jammu and Kashmir in northern India has always been difficult. In order to considerably shorten travel times, the Indian Government decided to build a new, 345km long railway route from Jammu to Baramulla.

This project also includes a new, 1,315m long railway bridge across the Chenab River near the town of Katra. Once completed, the bridge, the 469m long main span of which reaches a height of 359m above the River Chenab, will be the world’s highest railway bridge.

As the bridge has a design life of 120 years, the General Contractor needed a proven, reliable system for stabilizing the Chenab Valley’s massive slopes that have angles between 43° and 77°.

Furthermore, the system was also required to be earthquake-resistant. DSI proposed its double corrosion protected (DCP) DYWIDAG Bar Anchor System consisting of WR DYWIDAG Bars, which is known around the world for its quality and reliability.

Due to the fact that the construction site is located in one of the most remote and difficult to reach parts of India, DSI together with its partners decided to produce the DYWIDAG Anchors in a field factory directly on site using high-quality materials in order to ensure the highest possible quality. This way, the permanent corrosion protection can be applied in the close vicinity of the site, and the corrosion protection applied on the DYWIDAG Systems is not exposed to damage during the long road transport to the site. In addition to the supply of the DYWIDAG Rock Anchors including accessories, the scope of DSI and its Indian partner company also included the supervision of on-site production, the installation and the stressing of the bar anchors as well as the supply of the necessary equipment. So far, DSI has already provided over 10,000m of DYWIDAG bars, mainly 40 WR and 47 WR. All systems were supplied in different lengths, including bearing plates, anchor caps, nuts, ducts, and corrosion protection compound. In addition, for force monitoring, the DYNA Force® System was supplied for its first Geotechnical application in India.

Slope stabilization was carried out in layers of 3-5m from top to bottom. After excavating each section, the boreholes for the DYWIDAG Rock Anchors were drilled.

The anchors were installed and grouted using cement mortar following stressing. For additional stabilization, steel fiber reinforced shotcrete was applied to the slopes to conclude the project.

DSI is proud to contribute reliable systems to this important major project.

Productionsupplyengineering services

Konkan Railway Corporation Ltd., India

WSP Consulting, Finland, Leonhardt, Andrä und Partner Beratende Ingenieure VBI AG, Germany