05/08/2025
Anna Jagiellon Bridge, Warsaw, Poland
construction using Overhead Movable Scaffolding System
The new Vistula crossing integrated into the S2 Expressway and consists of two parallel decks with the following lengths:
• Central bridge MG04-02 measuring 536.5 m per deck;
• MG04-01 and MG04-03 access viaducts with a total of 970 m per deck.
The client:
GP Mosty JV
Gülermak Heavy Industries Construction & Contracting Co. Inc Branch in Poland and Road and Bridge Construction Company Sp. z o. o.
Taking into account conditions and location of construction site, Overhead Movable Scaffolding System (OHMSS) combined with a Wing Formtraveller (WFT) solutions was implemented.
The OHMSS is used for concreting the central deck box and the WFT used to install the precast struts and concrete the wings.
The broad range of technical requirements used during the design phase of the OHMSS included the following features:
• the outer formwork of the OHMSS must be possible to open when free distance to the ground is only 3.0m;
• the outer formwork must be able to pass in the closed position over the existing railway without reaching a height of more than 0.7 m;
• the rebar U-cages (bottom slab and webs) of the deck must allow for assembly in 12 m sections and in the final position using the transport devices that equip the OHMSS;
• the sections of the rebar U-cages of the deck must allow for lifting from ground level or as an alternative be transported over the deck that has already been built and later moved through the inside of the OHMSS main structure through its rear support;
• the deck shall be concreted in two phases, the first phase involving the concreting of the central box using the OHMSS, the second phase involving the installation of the pre-fabricated struts of the deck wings and the concreting of the wings itself using the WFT;
• allow for the OHMSS to move backward to the abutment and proceed with a side-shift to the alignment of the second deck parallel to the first one;
• allow for the passing of the OHMSS through the WFT, after dismantling the OHMSS external formwork and without needing to dismantle the WFT (only its 4 legs are dismantled);
• allow for the forward movement of the OHMSS passing over the deck of the central bridge to the opposite shore of the Vistula River
STRUKTURAS
WE MAKE IT SIMPLE!
Credits to Piotr Pyra and Jerzy Łyczko
