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Arch bridge over the Mangart River, Slovenia

Execution of 5 meters of structure in less than 7 days
The bridge over the Mangart river makes part of the road connecting Italy and Slovenia through the Predil Pass.

Description

The bridge over the Mangart river makes part of the road connecting Italy and Slovenia through the Predil Pass. After its demolition due to recent floods, it was necessary to rebuild it in an environment with a rather complicated terrain-the Alps. In fact, the work was performed 50 m above the river.

ULMA Solution

The construction of the arch with a variable thickness (1.5 to 0.8 m), 5 m width and 90 m length was carried out. The most cost-effective solution for this case was offered taking into consideration its location and dimensions: MK Structures was applied to create a cantilever system trolley that was used from the beginning to the end of construction.

The first stages of the project were completed without moving the cantilever trolley, which was supported on the foundation and tied to the pier. The following stages were performed by moving the trolley to the consecutive pouring steps by means of a hydraulic system. This mechanism minimised the time and the number of operations needed for placing it in the required position-less than 4 hours.

The fast progress of the work was possible since 5 m of arch structure were built in less than a week.

The 12 m trolley length and the 6 m working platform enabled to use 12 m reinforcement steel bars. This fact made the reinforcement preparation easier and therefore resulted in cost and time savings.

Other systems were applied in this project to secure a fast and safe working pace. These systems showed their versatility and adaptability to any type of configuration and dimensions.