Although tunnels are much more expensive to construct than surface roads, they increasingly are being chosen in order to protect sensitive environments and reduce disruption, noise and vibration in urban areas. New engineering innovations such as tunnel boring machines and the New Austrian Tunneling Method can reduce the cost of tunneling. Roadheaders, which are versatile cutting machines for tunnel work, are able to cut irregularly shaped openings economically. This article describes how the roadheaders are being used in three tunneling projects in Sydney. A new grade of cemented carbide has been developed to increase the wear resistance and strength of the picks. This carbide has been combined with an optimized, adapted cutter head and machine system to create a new cutting system for heavy roadheaders that uses a reduced cutting speed and a more effective cutting concept to consume less that half the energy of earlier systems.

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  • Corporate Authors:

    Route One Publishing Limited

    Horizon House, Azalea Drive
    Swanley, Kent  United Kingdom  BR8 8JR
  • Publication Date: 2004-10


  • English

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Filing Info

  • Accession Number: 00982048
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 28 2004 12:00AM