THE EVOLUTION OF THE HARD ROCK ABM

This article explains the evolution of the hard rock auger boring machine (ABM). It begins with a short history of ABMs and their initial use in loose soils, sands, gravel, and consolidated materials. The improved performance of ABMs is attributed to their combined use with modern pipe jacking methods, better steel casing pipe, improved materials for augers and bits. This has enabled ABMs to bore longer and larger tunnels. The development of specifically designed rock cutting heads, commonly known as small boring units (SBUs), has also benefited ABMs. The article looks at ABM thrust and torque requirements, how SBUs are steered in the tunnel boring process, and how SBUs can accommodate large diameters and long drives. The article concludes with an emphasis on how an ABM and SBU system can be highly efficient in excavating and pipe installation, as well as providing a cost effective solution for small bore rock excavation.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0041414X
• Corporate Authors:

  Polygon Media Limited

  Tubs Hill House, London Road
  Sevenoaks, Kent TN13 1BY,   United Kingdom 
• Authors:
  • Roby, J A
• Publication Date: 2005-3

Language

• English

Media Info

• Features: Photos;
• Pagination: p. 23-25
• Serial:
  • Tunnels & Tunnelling International
  • Volume: 37
  • Issue Number: 3
  • Publisher: Progressive Media Markets, Ltd
  • ISSN: 0041-414X

Subject/Index Terms

• TRT Terms: Augers; Cutting tools; Pipe jacking; Rock excavation; Tunnel borers
• Subject Areas: Construction; Pipelines;

Filing Info

• Accession Number: 00989390
• Record Type: Publication
• Source Agency: UC Berkeley Transportation Library
• Files: BTRIS, TRIS
• Created Date: May 3 2005 12:00AM