Poland's longest span with successive cantilever technology — ULMA Begira

Ulma Construction

Poland's longest span with successive cantilever technology

The new bridge over the Dunajec River is part of the construction of the link between the A4 motorway in Wierzchosławice and the SAG industrial area in Tarnów, Poland.
Poland's longest span with successive cantilever technology
Feb 22, 2023

Built using balanced cantilever technology, this bridge has a span length of 185 m and is the longest bridge built in Poland using this method.

The 13.75 m, 814.8 m long single-carriageway bridge was built out in three phases, two transition sections, M1 and M3, using T-60 frame shoring systems and HMK beam formwork, and the M2 superstructure spanning the river, with CVS cantilever formwork carriages.

ULMA supplied four CVS cantilever formwork carriages units to build the cantilever stretch structure. The main structure of the carriage consists of two lattices connected with MK trusses from which the upper and lower slab formwork is suspended. The front part of the carriage is equipped with a BRIO scaffolding platform, which is used for tensioning the segments and as an access system to other platforms. It is also equipped with a hydraulic system that facilitates lifting, levelling and advanced carriage operations. All working platforms are equipped with perimeter protection with MBP mesh edge protection.

Various ULMA formwork systems have been used in this project. ORMA modular formwork was used for the foundations, abutments and intermediate supports. A 16 m long pier segment was designed on top of the piles located in the riverbed, supported by T-60 shoring. The bottom slab and the deck side walls were formed with the ENKOFORM HMK beam system. The falsework of the upper slab between the side walls was carried out with BRIO shoring.

Workspaces were protected by comprehensive occupational safety and health systems during all phases of the project, and the BRIO system ensured effective communication between the different areas.

Enjoy the spectacular aerial images of the project in this video.