Swedish experience shows that a proper understanding of the process of tunnel support using a thin layer of shotcrete, coupled with modern methods of application should lead to a wider application of the system. The author evaluates the design approach to shotcrete support based on measurements, rock classification and experience. The important advantages of shotcreting, either as a temporary or permanent support are given. These include economy, adaptability, no need for shuttering or complicated equipment. Recent developments in Swedish remote-controlled shotcreting equipment are described. The operation of the robot system is outlined; its major advantage is in its capacity to tackle and pass a cave-in quickly and efficiently. A reliable combined transporting and batching system, the trixer, has been developed. The use of liquid accelerators and proportioning pumps are described. Research into the use of steel-fibre reinforcements is outlined. (TRRL)

  • Authors:
    • Kramers, M
  • Publication Date: 1978-9


  • English

Media Info

  • Features: Figures; References;
  • Pagination: p. 31-35
  • Serial:
    • Water Power
    • Publisher: IPC Electrical Electronic Press Limited

Subject/Index Terms

Filing Info

  • Accession Number: 00316947
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Feb 6 1981 12:00AM