Author(s): G. D. Rose; D. H. Masterson; C. E. Friesen
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Abstract: During the spring of 1973, a test load was placed on the ice offshore in the Kristoffer Bay area of Ellef Ringnes Island, to study THE deflection behaviour of the ice sheet. The test load was constructed by filling with water a circular reservoir 50 ft. (15.2 m) in diameter with walls consisting of a snow dyke. At the same time, three stratigraphic holes were drilled offshore in the Kristoffer Bay area of Ellef Ringnes Island using the natural ice as a support for the drilling rig. The holes were drilled with a truck-mounted service rig weighing approximately 135,000 Ibs. (62,000 kg). Panarctic Oils Ltd. of Calgary retained FENCO to provide specifications for safe ice loading procedures for the strat holes and to conduct onsite monitoring during drilling, both at the rig sites and at the load test site. Vertical deflections of the ice were measured at each load site continuously. During drilling a close watch was kept on the time-deflection curves so that accelerating deflection rates and the onset of failure could be detected and the safety of personnel and equipment assured. As well, ice strengths, temperatures and thicknesses were measured regularly.
Year: 1975