Albvorland Tunnel (NBS)

The construction project is part of the Wendlingen – Ulm railway new construction line and includes the construction of the single-track, double-tube, approx. 8.2 km long Albvorland Tunnel. The main tunnel is being driven simultaneously with two TBMs (total drive length: 15,620.0 m) and connected by 16 conventionally constructed connecting structures. The machine drive of the north tube is connected in the west to the trumpet-shaped branching structure for the connection of the freight train line – a secondary line branching off in the tunnel structure – which reaches a maximum excavation cross-section of up to 255 m².
From the branching structure to the west portal, the north tube of the NBS is conventionally constructed. The portal areas of the Albvorland Tunnel are planned as single or double-cell rectangular frames in open construction. The east portal structure also serves as a bridge structure for the adjacent farm track. A 300.0 m long groundwater trough with wall heights of up to 13.0 m connects to the portal structure in the east. Partial areas of the groundwater trough are deep-founded due to the poor subsoil.In addition to the execution planning of the tunnel structures, the earthworks of the open track and a large number of secondary structures such as drainage structures and retaining walls were also planned in the course of the planning services. For the western area, all structures were planned using the BIM method as part of the execution overview planning and used for further project processing.