Portal to drilling documents and publications of interest to the ice drilling community. There are currently 513 documents in the Library.

Document Details

An Investigation of the Snow Adjacent to Dye-2, Greenland
Authors: Ueda HT, Goff MA and Nielsen KG
Year: 1981
Keywords: SR 81-3, DEW line, snow, snow strength
Periodical/Journal: CRREL Special Report 81-3
Abstract: 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 distributed nature of the material 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./ft2 (96 kPa).
Document: View document