Technical specifications

Overall concept: Tunnel boring machine + peripheral equipment

  1. Design, tender, award and production monitoring of slurry shield tunnel boring machine
    Boring diameter 4.30 m

  2. Design, calculation, verification, procurement, installation, commissioning, dismantling and maintenance of the following components:

    • System for the separation of the material excavated from the tunnel
      Total volume: 900 m³/h
    • Belt conveying system for the separation plant
    • Mud dewatering with polymer conditioning
    • Bentonite batching plant and silos
    • Compressed air station
    • Belt conveying system

  3. Provision of staff

General data

Corrib Pipeline Tunnel
Tunnel for a gas pipeline
Leasing of equipment & provision of services for the execution of the TBM slurry shield works.

Shell E&P Ireland Ltd., Dublin, Ireland

JV Wayss & Freytag Ingenieurbau AG, Germany - BAM Civil, Ireland

Wayss & Freytag Ingenieurbau AG
Tunnelling Department, Tunnel Technologies

Contract period
February 2012 to March 2015

Contract value, net
3.9 million €

Media / Supply
Service tunnel
4,900 m
Construction Method
TBM slurryshield drive

In the course of the Tunnelling Awards 2015, the International Tunnelling Association (ITA), with its head office in Geneva, awarded the Corrib Tunnel project the prize for best environmental initiative of the year.

The Irish Prime Minister Taoiseach Enda Kenny (centre) visits the project: „This is a very exciting project“, said Kenny. It comprises high-end engineering and the importance attributed to safety and health is remarkable. The project represents a significant investment in North Mayo and has made a considerable contribution towards promoting the regional economy.“

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