DEVELOPMENTS IN TUNNELLING TECHNIQUES

A summary is presented of a number of papers related to hydro work and related schemes which were presented at a recent symposium. One paper described the development of tunneling methods, the durability of cutting edges and the advantages of the tungsten carbide as a cutting material. The determination of rock deformation characteristics (using plate bearing tests near the surface and borehole extensometer tests for rock dialation in deeper rock) in sandstone surrounding a pressure tunnel in Australia was described in another paper. The main features, design data and construction factors were described of the 4800 m long pressure tunnel (for a hydroelectric storage plant) in the central Apenines. Hydro projects in Costa Rica which have shotcrete lined tunnels were detailed, and the bentonite shield technology and its intital application in Germany were also detailed. The way such shields are being improved in Japan, Britain and Germany were discussed. The results of investigations into the use of latex concrete in tunnel construction were summarized. The performance was described of a tunnel support system in four fathom mudstone; steel ribs, steel liner, rockbolts, or sprayed concrete supports were compared. The use of on-board monitoring and data acquisition systms for tunneling machinery was covered in another paper.

• Corporate Authors:

  IPC Electrical Electronic Press Limited

  Dorset House Stamford Street
  London SE1 9LU,   England 

  IPC Electrical Electronic Press Limited

  Dorset House Stamford Street
  London SE1 9LU,   England 
• Publication Date: 1976-4

Media Info

• Features: Figures;
• Pagination: p. 73-75
• Serial:
  • Water Power and Dam Construction
  • Volume: 28
  • Issue Number: 4

Subject/Index Terms

• TRT Terms: Bentonite; Cutting; Deformation; Hydroelectric power generation; Latex; Measurement; Monitoring; Mudstones; Pressure tunnels; Rocks; Sandstones; Shields (Tunnels); Shotcrete; Tungsten; Tunnel lining; Tunnel supports; Tunneling; Tunneling machines
• Old TRIS Terms: Shields (Tunneling)
• Subject Areas: Bridges and other structures; Geotechnology; Highways;

Filing Info

• Accession Number: 00135935
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 21 1976 12:00AM