Predicting TBM Excavatability

This is the first of two articles devoted to the newly developed Rock Mass Excavability (RME) index. The author describes excavability as the rate of excavation expressed in machine performance in meters per day. Tunnel boring machines (TBMs) revolutionized tunnel building, but the machines can be immobilized for months when unexpected ground conditions are encountered. Even in less drastic cases their progress can be disrupted and output severely decreased. Basing TBM advance rates solely on rock mass conditions has proved insufficient, while case histories show RME can better predict TBM advance rates on both rock mass quality and machine performance interaction. The author explains how RME index is determined as well as recent analyses and results.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0041414X
• Authors:
  • Bieniawski, Z T
  • Celada, Benjamin
  • Galera, Jose Miguel
• Publication Date: 2007-9

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 25-28
• Serial:
  • Tunnels & Tunnelling International
  • Publisher: Progressive Media Markets, Ltd
  • ISSN: 0041-414X

Subject/Index Terms

• TRT Terms: Excavation and tunneling; Mathematical models; Rock excavation; Shielding (Tunneling); Tunnel borers
• Subject Areas: Bridges and other structures; Construction; Public Transportation;

Filing Info

• Accession Number: 01080327
• Record Type: Publication
• Source Agency: UC Berkeley Transportation Library
• Files: BTRIS, TRIS
• Created Date: Oct 31 2007 6:38AM