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https://hdl.handle.net/11681/12353| Title: | Auger bit for frozen fine-grained soil |
| Authors: | Sellmann, P. V. (Paul V.) Brockett, Bruce E. |
| Keywords: | Augers Frozen ground Drill bits Frozen soil Drill design Boring Cold weather conditions |
| Publisher: | Cold Regions Research and Engineering Laboratory (U.S.) Engineer Research and Development Center (U.S.) |
| Series/Report no.: | Special report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 86-36. |
| Description: | Special Report 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 improved performance. Penetration rates were as high as 5 ft/min (1.5 m/min), compared to 0-1.4 ft/min (0-0.4 m/min) for the unmodified bits. Note: This report is a "Drilling Technology Note" |
| Rights: | Approved for public release; distribution is unlimited. |
| URI: | http://hdl.handle.net/11681/12353 |
| Appears in Collections: | Special Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| SR-86-36.pdf | 2.85 MB | Adobe PDF |  View/Open |