Reconstruction of bridges near Brandýs nad Orlicí
Facts and Figures:
Place/Country: Across the Orlice River near Brandýs nad Orlicí, Czech Republic
Completion: 2020
Project type: Panel (Bailey-type) Bridge
Client: Municipality of Brandýs nad Orlicí
Description:
In October 2020 Waagner-Biro delivered a multi-span panel steel bridge (Bailey type) with a total length of 61.560 metres (27.432m + 0.6m + 33.528m). It serves as temporary replacement bridge during reconstruction of an old road bridge across the Orlice River in the town of Brandýs nad Orlicí.
The bridge deck is based on an extra-wide (EW) carriageway-width (4.20 metres, measured from inside to inside of guardrail) and equipped with an external 1-metre walkway on each side of the bridge for a total of two walkways.
The bridge design is based on the traffic load model of ČSN EN 1991-2. The maximum permissible traffic load is a 48t tandem axis.
The two individual spans are supported by an intermediate square panel steel pier supplied by Waagner-Biro. The intermediate pier consists of the same components as the panel steel bridge, which makes this system so versatile for temporary applications. The Waagner-Biro Panel-Square-Tower consists of four (4) standard panels (10-feet panels) and I-beams. The beams support the dead load and the live load of the bridge. The beams are bolted together. The connection between the panels and the beams is by way of pins.
The temporary bridge makes sure that road and pedestrian traffic across the river Tichá Orlice will remain uninterrupted during the installation works of the new bridge next to it. Brandýs nad Orlici is a small town in the Pardubice Region of the Czech Republic and has approximately 1300 inhabitants.
The temporary bridge with two spans is a logical arrangement for the given space. The individual spans of 33 m and 27 m are supported by an intermediate pier (also delivered by Waagner-Biro) and span across the complete river bed in a most convenient and efficient way. It is based on a single-storey truss configuration.
The temporary bridge accommodates all traffic to the road III / 3115 between the villages of Oucmanice and Brandýs nad Orlicí. The bridge is also designed as the main route to the railway line between Prague and Česká Třebová, where modernization works will be undergoing in 2021.
The fixed bearings are located on the Oucmanice river bank. In order to allow for temperature movements of the bridge, sliding bearings are used on the intermediate pier between the water canal and Tichá Orlice River and on the abutment closer to Brandýs nad Orlicí. The fixed bearings of the panel bridge are cast into the foundation with six steel anchors per support. At the supports, the panels are connected via pin connection to so-called "End Posts" to transfer the loads into the substructure.
In 2021, Waagner-Biro delivered another temporary panel steel bridge (30.480m) across the Tichá Orlice River near Brandýs nad Orlicí. The bridge had an extra-wide steel deck (4.20m) and was designed for the crossing of maximum 48-ton vehicles.
