Albvorlandtunnel og Wendlinger-tilknytning

The Albvorlandtunnel and Wendlinger Connection is a crucial infrastructure project forming part of the new high-speed line (NBS) Wendlingen-Ulm, significantly enhancing the transport network in Baden-Württemberg, Germany. The project involves the construction of the Albvorlandtunnel, which consists of two single-track tunnels each 8,176 meters long, integrated with the 'Wendlinger Kurve' freight train connection of 494 meters and an additional 173 meters segment under the A8 highway. The tunnels are designed to support speeds of up to 250 kilometers per hour.

Avansert tunnelteknologi

The construction utilizes state-of-the-art techniques, including two EPB-shield tunnel boring machines (TBMs) with a diameter of 11 meters, and a total of 1,000 meters employing sprayed concrete construction methods. Various structural components, such as the portals at the east and west ends, are constructed in open form as Sonic-Boom structures. The western freight train connection runs along a single-track, 1.1-kilometer-long tunnel beneath the A8 and integrates with the northern tube of the Albvorlandtunnel. The east portal features the 'Small Wendlinger Curve,' connecting the new line via tunnel and trough structures to the existing route heading south.

Høye sikkerhetsstandarder

Safety and structural integrity are paramount in this project, with the tunnel tubes connected every 500 meters by cross passages that host supply chambers and safety cells for emergencies. These chambers were created using PERI Trio aluminum formwork. Additionally, deck and interior finishing works support operations including driveways for construction, and openings to mitigate air pressure effects (Sonic Boom). Special structural elements like 'Brillenwände' ensure seamless branching within the rock for tunnel entrance and exit, ensuring high safety standards for the freight connections.

Geologiske utfordringer

The project faces notable challenges, particularly due to the geological compositions encountered such as clay, marl, siltstone, and limestone, combined with the necessity to tunnel under the heavily trafficked A8 highway with minimal coverage. This requires a settlement-minimizing advance using double pipe roofing and calotte floor arch methods. The freight train tunnel build under the A8 involves maintaining traffic flow on the highway above by employing meticulous construction techniques.

Ferdigstillelse og fordeler

Commissioned by Deutsche Bahn (DB Netz AG), in collaboration with DB Projekt Stuttgart-Ulm GmbH, and involving engineering firms like ILF, Obermeyer Planen und Beraten GmbH, and PSP Consulting Engineers GmbH, the project has an overall budget of approximately 675 million euros. Initial construction began in January 2016, with completion expected by August 2021. The project aims to provide substantial societal benefits, improving regional connectivity and reducing travel times, thereby bolstering economic growth and enhancing the quality of life in the region.