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.
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