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|Title:||Excavations in frozen ground. part II, explosion tests in frozen glacial till, Ft. Churchill|
Livingston, Clifton W.
Frozen ground mechanics
Fort Churchill, Canada
|Publisher:||U.S. Army Snow, Ice, and Permafrost Research Establishment.|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||SIPRE report ; 30 pt.2.|
Summary: Explosion tests were conducted in frozen ground near Fort Churchill, Manitoba, Canada, as an extension of previous tests in Keweenaw silt. Atlas 60 Percent Straight Gelatin Dynamite, Demolition Block M5 Composition C-3, and Atlas Coalite 7S Ammonia-Base Permissible Dynamite were used as the explosives in amounts ranging from 0.5 to 20 lb. Approximately 150 craters were produced. The charges were cylindrical with height-diameter ratios ranging from 0.12 to 9.12, but the majority were in the interval between 2.5 and 4.0. The depths of charges varied, some being quite shallow and others sufficiently deep that no surface effect was observed. In general the results verify scaling laws and show that the critical depth varies as the cube root of the weight of charge. Consistent differences in performance of the explosives were observed. The shape of the charge also influenced the results, but scatter of the data preclude establishing conclusive trends of the influence. Detailed data on the shapes and sizes of the individual craters are reported.
|Appears in Collections:||Technical Report|
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|SIPRE-Technical-Report-30-Part-2.pdf||2.49 MB||Adobe PDF|