Flexibility and safety with the CVS Cantilever Formwork Carriage in the construction of the MS-4B Bridge in Poland

As in the case of the MS-4A bridge, the MS-4B bridge is implemented with Balanced Cantilever Formwork Carriage CVS to execute the spans crossing the Odra river. The ULMA carriages provide a high-performance solution, designed to offer significant weight-bearing capacity without any compromise in their ability to adapt to varied cross-sections. In the case of spans located above the ground, the incremental launching method was used.

After working with ULMA to execute the first carriageway, STRABAG chose ULMA again as supplier for formwork technology and solutions.  The MS-4B Bridge, spanning almost 500 m, is designed as a prestressed box-section concrete structure

For the span executed using the balanced cantilever method, the pier caps were built using the universal formwork system ENKOFORM HMK in combination with T-60 Frame Shoring Towers. Regardless of the construction method used, ENKOFORM HMK adjusted perfectly to the varied deck width along its entire length.

Each carrier is equipped with a hydraulic system used to advance, level, and anchor it. The use of a wide range of hydraulic systems allowed for the effective and safe advance of the formwork structure.

The form carriers are made from standard components from the universal MK System, making it a simple task to adjust both the formwork and form carrier structures to the geometry of the bridge. Moreover, standardising the CVS Form Carrier with the MK System allows for substantial savings in cost.

In order to guarantee that work is carried out safely, the form carrier was provisioned with working platforms at every level. The platforms, designed with BRIO Modular Scaffolding components, were set on the trusses at the front of the carrier along with the suspended formwork, thus guaranteeing employee safety while working with the formwork at the back of the carrier.

For more information, watch the video.