Improving Arctic Seafloor Soil Stabilityby James K. Mitchell, Univ of California, Berkeley, Berkeley, CA, USA,
Abstract: Soft, low strength soil layers at or beneath the Beaufort seafloor mean that soil strengthening may be necessary to ensure the stability of oil exploration and production structures under the action of horizontal ice loading. Preliminary studies have been made to evaluate the suitability of several methods for strengthening fine-grained soils characteristic of those found in the Arctic. Of the methods studied, vertical drains, freezing, in-situ mixing of admixtures, particularly cement, and special types of grouting are potentially applicable. Special techniques will be needed to facilitate the use of these methods below water.
Subject Headings: Sea floor | Soil stabilization | Soil strength | Soil grouting | Soil water | Ice loads | Soft soils | Structural strength | Arctic
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