Technical specifications

Project description

  • Construction of 130 excavation pits
  • 115 shaft structures and approx. 47 km of sewerage tunnel in 117 individual drives with individual lengths of < 20 m to 1.150 m

Construction method

  • For excavation pits the diaphragm wall and bored pile construction methods
  • Pipe jacking with DN 1600, DN 1800, DN 2200, DN 2400 and DN 2800 with 9 full-face TBMs using both the EPB- and slurry method
  • Crossing beneath waterways (Emscher Canal, Rhein-Herne-Canal), railway lines, roads, dams, buildings and pipelines
  • Standard pipe length 4 m
  • Thickness of pipe walls between 21 cm and 39 cm
  • Pipes consisting of acid-resistant concrete, some with additional special protection against corrosion. Microtunnel DN 300 to DN 1200
  • Maximum allowed settlement 20 mm Construction of shaft structures with conventional climbing formwork and slipform method
  • Also executed in acid-resistant concrete, partly with a special PE-HD lining as special protection against corrosion

Geology

  • Emscher marl
  • Sandy and silty clays
  • Tunnel alignment entirely below the groundwater table
    with a water pressure of up to 3 bar above the pipe invert level

General data

Project
Emscher Sewerage Tunnel
construction lot (BA)30 (BA 31, BA 32, BA 33)
between Dortmund-Mengede and Bottrop Sewage Treatment Plant

Client
Emschergenossenschaft

Contractor
Wayss & Freytag Ingenieurbau AG, Central,
Tunnelling & Specialized Civil Engineering/
Special Foundation Engineering Divisions

Construction period 
March 2012 to January 2017

Construction costs
€ 420 million

 

 

Utilisation
Water/ Sewerage
Type
Sewerage tunnel
Length
47 km
Construction Method
Pipe Jacking, 9 full-face TBMs using both the EPB- and slurry method
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