GUIDING TUNNEL MOLES WITH A LASER THEODOLITE

The article describes the use of a laser theodolite in civil engineering applications. The narrow beam produced by such laser apparatus is designed to provide a visible reference at the point of work so eliminating the need for a distant observer. The laser theodolite has an optical line of sight made visible by a laser unit. The equipment described uses a Wild Heerbrugg type glo laser eyepiece, which replaces the standard telescope eyepiece, in conjunction with a Hughes 4 MW HE NE laser light source. A description is given of the use of the equipment in a tunnel excavation project in Switzerland.

  • Availability:
  • Corporate Authors:

    Morgan-Grampian Limited

    30 Calderwood Street
    London SE18 6QH,   England 
  • Authors:
    • Ehbets, H
    • Schwendener, H R
  • Publication Date: 1978-4

Language

  • English

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 55-56
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00178609
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Sep 14 1978 12:00AM