Tunnel Pummersdorf

Surface Route, Lot GUM4

Client

ÖBB-Infrastruktur AG - GB Neu - und Ausbau

Contractor

BeMo Tunnelling GmbH (BeMo)

Project location

Freight railway bypass St. Pölten, GZU-Mitte, closure of the gap St. Pölten - Loosdorf, Austria

Start of construction

2012

End of construction

2015

Project total value

80 million €

Geology

Molasse“, “Schlier” (fine sand silt and claystone alternating with fine sand and marl layers), sandstone, sheet gravel, vertical clefts between “Schlier” and gravel, loam, arey by area cementation zones
Ground water (gravelly-sandy horizons) , cleft ground water in “Schlier”, up to 10 l/s entries of cleft ground water between East portal and km 11.80, water carrying gravel between km 12.1+60 and 13.0+70, ridge rain possible

Technical Data

Double-track railway tunnel, 1 tube with emergency exits and open track
New line total length: 12,800 m (Km 3.0+00 – Km 15.8+00)
Total length Tunnel: 3,485 m (Km 10.8+62 – Km 14.3+47)
Mining: 3,445 m (rising 3.4‰ West – -East)
Cross section: approx. 120 m² (≈ 410,000 m³)
6 Emergency exits with galleries (14 m, 870 m³) and shafts (18-30 m, Ø ≈ 8.50 m (≈ 10,100 m³) with waterproof execution
Cut & cover (East-/West portal) à 20 m cut & cover incl. portal blocks as “Weisse Wanne” (2 x 10 m blocks)
Excavation: drill and blast, soft material with excavator, 400 m underneath pipe roofing, 24 m pipe roofing East-/West portal
Design: NATM, cast-in-situ concrete lining (30 cm, unreinforced), inner lining with membrane lining (PVC), junction areas (reinforced), invert arch (unreinforded resp. in area of mass-spring-system with reinforced waterproof inner lining of base slab (200 m))
Surface route: construction of the track substructure, ballast, slope protection, signal installations, telecommunication system and energy supply system, streets and roads (new construction, adaption and transfer), drainage works, noise barriers (10,144 m, H=1,5-6m, ≈ 32,575 m²) & walls (4,669 m, H=2-4,8m), landscaping works, constructive engineering (retention chambers, noise barriers special constructions), transfer of channels and other constructions of third parties, removal of buildings, extinguishing water-supply pipe (portal area and A3)

Further project related information

• cover: 15-24 m
• 2 valley-like incised depressions, ridge cover 9-12 m
• only machines that work with biodegradable lubricants and hydrolic oils are used