An Investigation of the Snow Adjacent to Dye-2, Greenland.
Snow samples from five 50-ft (15.2-m) deep holes, augered adjacent to the west side of DEW Line Station Dye-2 in Greenland, were investigated for density and unconfined compressive strength. Forty-two percent of the recovered cores were tested. Ninety-three percent of the samples tested had a length...
Main Authors: | , , |
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Other Authors: | |
Format: | Text |
Language: | English |
Published: |
1981
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Online Access: | http://www.dtic.mil/docs/citations/ADA099139 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA099139 |
Summary: | Snow samples from five 50-ft (15.2-m) deep holes, augered adjacent to the west side of DEW Line Station Dye-2 in Greenland, were investigated for density and unconfined compressive strength. Forty-two percent of the recovered cores were tested. Ninety-three percent of the samples tested had a length/diameter ratio greater than 2:1. The loading rate was 2 in./min (51 mm/min). Sample end-effects appeared to influence a high percentage of the failures. The heavily disturbed nature of the materials is evidenced in the widely scattered values of density and strength with depth. A minimum and maximum strength value of 31 psi (0.21 MPa) and 1065 psi (7.34 MPa) respectively were obtained from a hole located 50 ft (15.2 m) from the structure. Using an approach similar to that used prior to the DYE-3 move in 1976, a safety factor exceeding 6.5 is obtained against a brittle bearing failure based on a maximum footing design load of 2000 lb/sq ft (96 kPa). (Author) |
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