NEW TECHNIQUES FOR THE BORING OF TUNNELS THROUGH ROCK

TECHNIQUES NOUVELLES DANS L'EXECUTION DES GALERIES AU ROCHER

Three technical innovations were recently introduced on the underground sites in the French hydro-electric installations--pre-shearing by means of explosives, which consists in creating a prior crack along the contour, or profile, of the structure; immediate support by means of quick-setting sprayed concrete, in order to protect the rock against damage; and excavation without the use of explosives, by means of drilling machines which cut regular sections, and reduce supporting operations. In the case of each method, historical and technological details are shown, illustrated by means of examples of applications on the French Electricity Board's sites.

• Authors:
  • Duffaut, P
  • Marin, G
• Publication Date: 1973-4

Language

• French

Media Info

• Features: Figures;
• Pagination: 40 p.
• Serial:
  • Annales de l'Institut Tech du Batiment Travaux Pub
  • Issue Number: 304
  • Publisher: Societe de Diffusion de Tech du Bat et de Trav Pub

Subject/Index Terms

• TRT Terms: Technology; Tunneling; Tunnels
• Geographic Terms: France
• Subject Areas: Bridges and other structures; Railroads;

Filing Info

• Accession Number: 00050583
• Record Type: Publication
• Source Agency: International Railway Documentation, Selection of
• Files: TRIS
• Created Date: Jan 24 1976 12:00AM