A TECHNICAL AND ECONOMIC EVALUATION OF WATER JET ASSISTED TUNNEL BORING

A full size mechanical mole outfitted with a high pressure water jet system was used to bore a section of tunnel in granite. Data collected in the laboratory and in the field are included in the report. Section 2 presents the equations pertaining to the hydraulic system. Section 3 details the relationships describing the hydraulic cutting of rock. Section 4 discusses the laboratory work done to evaluate the interaction between mechanical and water jet cutting systems. Section 5 presents a discussion of the field boring results obtained at Skykomish. In Section 6 a technical and economic evaluation of a hypothetical 20 foot diameter jet assisted machine boring Skykomish granite is presented. Finally, Section 7 contains the recommendations of work needed for the practical implementation of jet assisted tunnel boring.

  • Supplemental Notes:
    • See also PB-254 616.
  • Corporate Authors:

    University of Utah, Salt Lake City

    307 Park Building
    Salt Lake City, UT  United States  84112

    National Science Foundation

    Research Applied to National Needs
    Washington, DC  United States  20550
  • Authors:
    • Hustrulid, W
  • Publication Date: 1976-7-15

Media Info

  • Pagination: 160 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00155093
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: NSF/RA-760174
  • Contract Numbers: NSF-APR74-21784-A04
  • Files: TRIS
  • Created Date: Aug 31 1977 12:00AM