WORKING PROBLEMS AND SUPPORTING IN CONNECTION WITH ROCK SPALLING; EXPERIENCE FROM THE STRYNEFJELL ROAD TUNNEL WORKS

BERGTRYKKSPROBLEMER OG SIKRINGSTILTAK; ERFARINGER FRA STRYNEFJELLSANLEGGET

The supporting work against rock spalling in the tunnels at Strynefjellsveien is described. Stability problems due to rock pressure in the ospeli- and grasdal-tunnels were moderate and caused minor disturbance during construction. In parts of the oppljos-tunnel the problems were extensive with heavy rock spalling of the roof. Rock pressure measurements showed high horizontal stresses. The results of the measurements are presented and discussed in the light of problems experienced. In the last part of the tunnel a well suited working scheme, based on rapid supporting with polyester-anchored rock bolts and large platens, proved to be favourable and reduced the tunnel costs. /TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/8251902339
• Supplemental Notes:
  • Chapter from Norsk jord-og fjellteknisk forbund. Fjellspreingsteknikk bergmekanikk geoteknikk 1976.
• Corporate Authors:

  Norwegian Institute of Technology

  N-7034 Trondheim,   Norway 
• Authors:
  • Oevstedal, E
• Publication Date: 1977-3

Language

• Norwegian

Media Info

• Features: Figures;
• Pagination: n.p.
• Serial:
  • Publication of: Norwegian Institute of Technology
  • Publisher: Norwegian Institute of Technology
  • ISSN: 8251-902339

Subject/Index Terms

• TRT Terms: Anchor bolts; Anchorages; Costs; Excavation and tunneling; Loads; Measurement; Platens; Pressure; Rocks; Spalling; Stability (Mechanics); Stresses; Tunnels
• Uncontrolled Terms: Horizontal
• Geographic Terms: Norway
• ITRD Terms: 3420: Anchorage; 224: Cost; 9029: Horizontal; 5567: Load; 6136: Measurement; 8084: Norway; 5412: Pressure; 4154: Rock; 5231: Spalling; 5930: Stability; 3374: Tunnel
• Subject Areas: Bridges and other structures; Construction; Finance; Geotechnology; Highways; I54: Construction of Tunnels;

Filing Info

• Accession Number: 00184273
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Jan 13 1979 12:00AM