The article describes the subterrene system designed for tunnelling in loosely compacted formations in which a glass lining is formed to support a tunnel roof either as a temporary or a permanent measure. In tests the roof and sides of an experimental tunnel were formed by melting a series of 50mm diameter horizontal holes approximately 2M deep in a loose fill material using electrically heated consolidating subterrene penetrators. The holes were sufficiently close for the glass linings to fuse and so produce a double walled lining reinforced by webs. After tunnel roof and walls were formed, the fill material could be excavated by hand. A long-term development of this system includes equipment to melt a continuous kerf around the periphery of a tunnel being constructed in unconsolidated material so that the melt would be deposited in the form of a thick glass tunnel lining. /TRRL/

  • Availability:
  • Corporate Authors:

    Morgan-Grampian Limited

    30 Calderwood Street
    London SE18 6QH,   England 
  • Authors:
    • Williams, R E
  • Publication Date: 1975-1

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 44-45
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00129564
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Apr 7 1976 12:00AM