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Renewal of the Track System – Lötschberg Summit Tunnel, Southern Section

Renewal of the Track System – Lötschberg Summit Tunnel, Southern Section

Upgrading and refurbishment of the ballasted track, installation of slab track, adaptation of tunnel drainage, cable protection systems and escape routes.

Lötschberg Scheiteltunnel Bild1

The project involved the refurbishment of 0.2 km of ballasted track and the conversion of 1.3 km of ballasted track to the slab track system.

Key tasks included:

  • Excavation of the existing ballast track and construction of a new slab track
  • Renewal of four turnouts
  • Installation of a transition structure between ballasted track and slab track
  • Adaptation of the drainage system (installation of transverse drains, construction of longitudinal drainage channels and side drains)
  • Installation and adjustment of railway safety systems (axle counters, balises, cable connection boxes, dwarf signals)
  • Construction and installation of chambers for signalling and telecommunications cables
  • Widening of escape routes and construction of an escape-route crossing

 

Technical Data

Construction of LVT slab track2’556 m
Slab track for turnouts (EW 60E2-900-1:9)           4 Stk.
Rail installation UIC 60 E2 & 54 E2 R260/R350HT   5’600 m
Supply and installation of slab track concrete3'150 m3
Construction of transverse drains61 units
Construction of drainage channels1'150 m
Construction of signalling & telecom chambers8 units
Supply and installation of LVT blocks18'600 units
Aluminothermic welds117 units
Ballast excavation8'050 t
Track panel excavation370 t
Escape route widening1'322 m
Construction of ballasted track (2 tracks)226 m

Special Challenges

  • Limited space for the installation of turnouts
  • Short work windows due to restricted blockade times on the adjacent operational track
  • Logistically demanding material transport, especially the installation of the LVT blocks
  • Localised groundwater ingress