THE HUGUENOT TUNNEL - DU TOITSKLOOF

The 3.9 km long tunnel, carrying a road link through a mountain range in the western cape, was driven through granite apart from a fault zone following which some 700 M of sandstone and quartzitic sandstone was encountered. A wide range of concrete and other cementitious products such as shotcrete, Gunite, structural pavements, pipe linings and fibre cement products were used. The pavement was constructed in concrete because of its long life and good light reflecting properties. A small pilot tunnel was driven along the line of one of the twin bores. Saturated talus or scree products on the lower slopes meant that the western portal was excavated using ground freezing. More than 40 steel arches, as well as invert concrete arches were installed in the fault area in addition to rockbolts and mesh reinforced shotcrete. The approach fill to the western portal is retained by one of the longest reinforced earth wall constructions in the country.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03799824
• Corporate Authors:

  Publications Division, Capricorn Communications

  PO Box 1111
  Halfway House,   South Africa 

  Publicaitons Division, Capricorn Communications

  PO Box 1111
  Halfway House,   South Africa 
• Authors:
  • -
• Publication Date: 1989-6

Language

• English

Media Info

• Pagination: p. 13-6
• Serial:
  • CONCRETE BETON
  • Publisher: Concrete Society of Southern Africa
  • ISSN: 0379-9824

Subject/Index Terms

• TRT Terms: Anchorages; Arches; Bolts; Cement; Excavation; Excavations; Fibers; Freezing; Granite; Mechanically stabilized earth; Quartzite; Reinforced concrete; Retaining walls; Rigid pavements; Sandstones; Shotcrete; Slope stability; Steel; Tunnel lining; Tunnels; Wire mesh
• Geographic Terms: South Africa
• ITRD Terms: 3420: Anchorage; 3373: Arch (structural); 3888: Bolt; 4758: Cement; 5155: Excavation (process); 4557: Fibre; 3601: Freezing (method); 4101: Granite; 3470: Mesh; 4102: Quartzite; 4794: Reinforced concrete; 3349: Reinforced earth; 3359: Retaining wall; 2964: Rigid pavement; 4104: Sandstone; 4730: Shotcrete; 5783: Slope stability; 8103: South Africa; 4542: Steel; 3374: Tunnel; 3385: Tunnel lining
• Subject Areas: Bridges and other structures; Geotechnology; Highways;

Filing Info

• Accession Number: 00498127
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Sep 30 1990 12:00AM