Tunnel Bertoldshofen

B16 / B472 local bypass Marktoberdorf and Bertoldshofen, building of a two-lane road tunnel, one tube

Client

Autobahndirektion Südbayern
Seidlstraße 7-11, 80335 Munich
Germany

Contractor

BeMo Tunnelling GmbH, Niederlassung West

Project location

87616 Bertoldshofen,
County Ostallgäu, Bavaria
Germany

Start of construction

2018

End of construction

2021

Project total value

23.5 million €

Geology

upper freshwater molasse, ground moraine, glacial outwash gravel

Technical Data

Federal Roads B16 / B472 local bypass Marktoberdorf and Bertoldshofen, building of a two-lane road tunnel, one tube with
two lanes in both directions
Tunnel:
• length: 599.00 m
• standard section / widened section: 100 m² / 130 m²
Excavation: excavator, loosening blastings
Execution: NATM partly with pipe umbrella, side wall drift in widened cross-sections
Final lining: in-situ concrete reinforced d = 35 – 60 cm
with waterproofing membranes,
PP-fibre concrete in the vault
1 technical and rescue tunnel
• length 170,00 m
• cross-section 13,00 m²

Further project related information

• Precuts south portal by permanent discontinuous bored pilewalls with shotcrete infilling and top plates, back anchorages by strand anchors
• Operations building with retention basin and firewater basin
• Slope stabilization by nail wall
• Earthworks, Tunnel upgrade incl. extinguishing water pipe and road construction