Drilling and Preparation of Reusable; Long Range; Horizontal Bore Holes in Rock and in Gouge : Vol. II, Estimating Manual for Time and Cost Requirements

The objective of this study is to assess horizontal drilling as an alternative to pilot tunneling in geological investigation prior to the design and construction of highway tunnels and to identify means to increase the penetration capability and accuracy and decrease the cost of horizontal drilling. This volume presents a model for estimating the time and cost of drilling long horizontal holes. Sample problems are worked in detail to illustrate the application of the model to four (4) different drilling techniques. Procedures to apply the model to any combination of geological conditions are illustrated with an example problem. The logic and format of the model are adaptable to future improvements in the state-of-the-art of horizontal drilling. This is the second of three volumes. Volume I is published as FHWA-RD-75-95, subtitle: A State-of-the-Art Assessment. Volume III is published as FHWA-RD-75-97, Subtitle: A Development Plan to Extend Penetration Capability, Increase Accuracy and Reduce Costs. /FHWA/

  • Record URL:
  • Supplemental Notes:
    • Sponsored by the Department of Transportation, Federal Highway Administration.
  • Corporate Authors:

    Foster-Miller Associates, Incorporated

    350 Second Avenue
    Waltham, MA  United States  02254

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Mack Jr, W M
    • Tracy, N
    • Wickham, G E
  • Publication Date: 1975-10

Media Info

  • Media Type: Digital/other
  • Pagination: 106 p.
  • Serial:
    • Issue Number: 5B2-0

Subject/Index Terms

Filing Info

  • Accession Number: 00131390
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-RD-75- 96 Final Rpt., 42
  • Contract Numbers: DOT-FH-11-8486
  • Files: NTL, TRIS, USDOT
  • Created Date: May 14 1976 12:00AM