BMG GmbH & Co. KG - Keithstrasse 2-4 - D-10787 Berlin | Tel: +49 (0)30 2100220

PDB 55

Construction Project
Metropolitan Railway Bochum, Contract section D7
Location
  • Bochum-Riemke
Client
  • City of Bochum
Planning
  • Metropolitan Railway Construction Office of the City of Bochum
Investment volume
  • approx. DM 29.0 million
Construction time
  • 33 months
Contracted services for BMG
  • Construction management
  • Contract management
  • Technical coordination
Structures constructed
  • Starting shaft in dig-and-cast construction method with overlapping caisson piles
  • Two one-track railway platform tunnels (L = 110 m) with an excavation cross-section of 55 m² each
  • Underground track change (L = 96 m) with a maximum excavation cross-section of 122 m²
  • Two one-track railway tunnels (L = 880 m) with an excavation cross-section of 21 m² each
Special features
  • Tunnelling using special tunnel excavating machines or, due to space restrictions, using a small local section machine
  • Tunnelling using New Austrian Tunnel construction method, making use of reasonable cross-section breakdowns
  • Tunnelling of track change with excavation cross-sections of 36 m² to 122 m²
  • Restriction of the settlement to 20 mm
Utilization
  • Metropolitan railway tunnel of the City of Bochum
Construction
  • Driving of the tunnels in partial cross-sections
  • Securing of the tunnel embrasure using lining arches, concrete reinforcement steel mats and spray concrete
  • Installation of all tunnel inner shells using concrete impervious to water
  • Installation of the inner shell with a full-round formwork carriage in the area of the distance profile
  • In the area of the station profile, installation of the inner shell with preceding invert and following arch formwork carriage
  • In the area of the track change, installation of the inner shell using invert-wall-ceiling construction