Bridges Sázava

The overall structural concept for the high-speed rail bridges in the competition proposal is the result of balancing requirements for durability, resistance to climatic influences, and minimal operational intervention. We sought to seamlessly integrate both bridges into the Posázaví landscape as a contemporary engineering structure with timeless visual appeal. We have interpreted the archetype of the railway viaduct in a modern way (the “Posázavský Pacifik” of the 21st century) with a calm, rhythmic sequence of arches that will not disrupt the views of residents in the surrounding landscape. The arches are designed with an emphasis on maximum repeatability across both bridges, as well as for other potential crossings along the high-speed rail line, which will contribute to cost optimization.

The monolithic concrete bridge on the high-speed line represents a modern and technically advanced solution emphasizing robustness, long-term maintenance-free operation, reliability, and high operational safety. A series of reinforced concrete arches with a span of 70 meters, which smoothly span the valley, helps absorb the significant horizontal braking forces of high-speed trains. The designed span is based on the structural behavior of the structure, allowing the entire structure to be constructed as a bearingless design, thereby eliminating the need for regular replacement or maintenance of moving parts. Horizontal forces from the load are transferred by the robust arch structure to the deep foundation, ensuring high stiffness and stability under dynamic loads from high-speed traffic.

Seamless track, which allows trains to pass smoothly and quietly without the need for rail expansion joints, enhances passenger comfort and reduces shocks and wear on both the track superstructure and bridge structures.