Author(s): D. M. Masterson
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Abstract: Insitu compressive strength testing of ice has proved its usefulness over the past years. Several tests can be done quickly using light equipment which is transportable by small aircraft. The results obtained provide engineering parameters which are readily useable in design. Different types of in situ tests have been conducted over the past years. Some have been conducted in pits using plates and hydraulic rams to apply load to the pit face. Borehole tests grew out of these pit tests and this type of testing and its meaning will be discussed in this paper. A hydraulic borehole jack used for compression testing of the walls of a 150 mm borehole is shown in Figure 1. This borehole jack has been widely used in offshore regions from North Slope Alaska to Labrador and in Japan and Northern Europe for the insitu determination of ice confined compressive strength and elastic modulus. It has proved to be rugged, portable, simple to operate and relatively trouble free.
Year: 1992