Post-Tensioning Systems help connect Czech Republic and Germany
In order to improve infrastructure and to make the region more attractive for new industries, a new highway was built to serve as a direct connection between Prague and Chemnitz. Construction of this project included a by-pass around the city of Chomutov. In this section, the Hačka Bridge was built using the classical free cantilever construction method. The viaduct is located on a curve with a radius of 500m and a 6% incline.
The Hačka Bridge is 332m long and has spans of 60m + 106m + 106m + 60m. The three delicately designed main pylons consist of two parallel concrete slabs that are linked to each other at the pier head. The roadway is 23m wide and leads over the valley at up to 60m height.
The DSI licensee for the Czech Republic, SM7, Prague, was awarded the contract for supplying and installing all of the longitudinal and transversal post-tensioning tendons in this structure. The approved DYWIDAG 19x0,62" Bonded Strand Post-Tensioning System and type MA 6819 Anchorages were successfully used for longitudinal posttensioning. Transversal post-tensioning was carried out using DYWIDAG 4x0,62" Strand Tendons with SD 6804 and ED 6804 Plate Anchorages.
In addition, the piers were post-tensioned using a total of 300m of 36mm Ø DYWIDAG Bars. All in all, SM7 supplied 255t of DYWIDAG Strand Tendons, 29,000m of ducts and approximately 300m of DYWIDAG Bar Tendons for this project.
The bridge was opened to traffic in October 2006. It is now part of one of the most important bypass roads in western Bohemia with a direct connection to Germany.