Build infrastructure faster – Better framework conditions for bridge construction in Germany
For the modernization of road infrastructure and the replacement of old, unsound bridges, alternative construction methods are being sought that are particularly fast, traffic-compatible, and economical. The Federal Ministry of Transport (BMV) is focusing on innovative approaches that can be implemented within the framework of pilot projects. The emphasis is primarily on the standardization, digitization, and standardization of planning and construction, as well as the large-scale use of prefabricated and modular construction methods in practice. Prefabricated construction offers numerous advantages. The components are manufactured under controlled, climate-controlled conditions in factory halls, which ensures high quality. This construction method is particularly suitable for smaller bridges – approximately 80% of bridges in the motorway network are less than 50 meters long. The parallel production of individual components or modules leads to a significant reduction in overall construction time. This minimizes traffic disruptions, as the prefabricated elements only need to be assembled on site.
However, there are system-related limitations: The maximum lenght of elements (up to approximately 45 m) and the transport weight of the prefabricated elements (approximately 80 to 110 tons) must be considered to ensure transport and assembly. Static requirements such as precise alignment and the consideration of joints are also crucial, as these can act as potential weak points and affect the bridge’s durability.
The acceleration effects of prefabrication arise primarily from parallel prefabrication and rapid installation. This shortens closure times on heavily trafficked routes such as highways and Federal roads, reduces congestion and CO₂ emissions, and lowers overall costs. In total, prefabrication offers great potential for road infrastructure modernization, shortening construction times and minimizing the impact on traffic and the environment.
