INNOVATIONS IN TUNNEL SUPPORT SYSTEMS

MEDIUM-TO-LARGE TRANSPORTATION TUNNELS IN BOTH SOIL AND ROCK ARE CONSIDERED. WHILE PRIMARY EMPHASIS IS GIVEN TO SUPPORT SYSTEMS FOR MACHINE-BORED TUNNELS, IMPROVEMENTS IN CONVENTIONAL TUNNEL SUPPORTS ARE ALSO INCLUDED. THE EXTRUDED LINER SYSTEM, WHICH CAN PLACE A LINING BY SLIPFORM METHOS IMMEDIATELY BEHIND A BORING MACHINE, IS DESCRIBED IN DETAIL. THE LINING MATERIAL WHICH NOW MAKES SUCH A SYSTEM PRACTICAL IS WIRE-FIBER REINFORCED CONCRETE MADE WITH HIGH, VERY- EARLY STRENGTH REGULTED-SET CONCRETE. POLYMER CONCRETE IS THE MOST PROMISING NEW MATERIAL FOR SEGMENTED LININGS. SQUARE TUBULAR AND CIRCULAR PIPE SECTIONS ARE SHOWN TO BE STRUCTURALLY SUPERIOR TO WIDE FLANGE SECTIONS FOR STEEL FRAME TUNNEL SUPPORTS SUBJECTED TO A COMPLEX SET OF LOADS FROM DIRECTIONS LARGELY GOVERNED BY THE JOINT PATTERN IN THE ROCK MASS. NEW MATERIALS FOR SPRAYED SUPPORT SYSTEMS AND SEMIAUTOMATIC MECHANIZATION OF SPRAYED SUPPORT SYSTEMS ARE EVALUATED. GUIDELINES FOR SELECTION OF THE MOST ECONOMICAL TUNNELS ARE PRESENTED. /AUTHOR/

  • Corporate Authors:

    University of Illinois, Urbana-Champaign

    Department of Civil and Environmental Engineering
    205 North Mathews Avenue
    Urbana, IL  United States  61801-2352
  • Authors:
    • Parker, H W
  • Publication Date: 1971-5

Media Info

  • Pagination: 263 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00209681
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 18 1972 12:00AM