Auger Bit for Frozen Fine-Grained Soil

Abstract

Auger bits 6.5 in. (165 mm) and 9.5 in. (241 mm) in diameter were modified to satisfy military and general engineering requirements for producing holes in frozen soil. A commercial bit was selected since it appeared to need only minor modification. Penetration tests were run in frozen fine-grained soils, one type containing some gravel. Modifications, which primarily involve changes in cutter relief angles, substantially improves performance. Penetration rates were as high as 5 ft/min (1.5m/min), compared to 0-1.4 ft/min (0.04 m/min) for the unmodified bits. Keywords: Augers; Drill bits; Drill design; Frozen soil.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1986
Accession Number
ADA190343

Entities

People

  • Bruce E. Brockett
  • Paul V. Sellmann

Organizations

  • Cold Regions Research and Engineering Laboratory

Tags

DTIC Thesaurus Topics

  • Availability
  • Cold Regions
  • Construction
  • Diameters
  • Drilling
  • Drills
  • Engineering
  • Fabrication
  • Grain Size
  • Literature
  • Materials
  • Moisture Content
  • Pavements
  • Regions
  • Security
  • Soil Tests
  • Test Facilities

Readers

  • Geotechnical Engineering.
  • Manufacturing Engineering.
  • Mathematics or Statistics