en.Wedoany.com Reported - Italian heavy lifting company Marraffa has completed the installation of a railway bridge on the Benevento section of the Naples-Bari high-speed railway line. The company utilized the Enerpac JS-250 jacking system to lift the 600-ton railway bridge deck approximately 4 meters and then move it laterally onto concrete piers.

The project is located between Amorosi and Melizzano, where the new railway line crosses a 30-meter-wide river. The bridge deck, measuring 65 meters in length, was initially placed on supports beside the railway line. Marraffa deployed two JS-250 towers at each end of the deck, utilizing a total of four jacking units for the initial lift. Subsequently, the deck was placed on temporary barrel supports to facilitate positioning by a hydraulic gantry system, enabling the lateral movement of the railway bridge deck.

Michele Marraffa, CEO of Marraffa, stated that the river's width posed challenges for a crane-based installation approach, whereas the jacking system ensured the deck remained level throughout the operation. The company ordered the Enerpac equipment last April, and this installation represents an application case of the JS-250 system in Italy's rail transit infrastructure sector. This railway bridge installation is part of the Naples-Bari high-speed railway line construction project, which is designed for speeds of up to 250 km/h.

Earlier in January, Norwegian company Nordic Crane also selected the Enerpac JS-250 jacking system for a bridge expansion project in Denmark. This railway bridge installation demonstrates the technical adaptability of jacking systems in complex terrain conditions, such as crossing rivers. Marraffa noted that hydraulic synchronous jacking technology effectively enhances the precision and safety of installing large prefabricated components.

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