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N4 New Axenstrasse construction lot 301

Facts and Figures
Company PORR SUISSE AG in consortium
Principal Canton Schwyz and Uri
Location Axenstrasse - Switzerland
Type Road construction, Special civil engineering
Runtime 03.2024 - 10.2026

N4 New Axenstrasse construction lot 301

New construction of a retaining structure on the mountain side (anchor wall in sub-foundation construction and lining wall): Work and construction logistics in very steep terrain:

  • Excavation of loose soil and rock, large quantities
  • Excavation pit stabilisation using nail wall
  • In-situ concrete work in small stages (anchored element wall)
  • Nailing of fissure body
  • Pre-stressed, permanent strand anchors
  • Seepage pipe

New construction of cantilever and supporting structures, stacking basin and outlet structure on the lakeshore in confined spaces between the SBB railway line and Alte Axenstrasse:

  • Removal of road, reinforced concrete and natural stone construction
  • Excavation pit stabilisation using nail wall
  • In-situ concrete work
  • Waterproofing
  • Backfilling
  • Pipe jacking (diameter 610mm) under the SBB train line
  • Hydraulic engineering with construction of outlet structure

Road construction: foundation layer, surfacing, drainage, utilities and equipment.