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Improving Arctic Seafloor Soil Stability

by James K. Mitchell, Univ of California, Berkeley, Berkeley, CA, USA,



Document Type: Proceeding Paper

Part of: Civil Engineering in the Arctic Offshore

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: Soil strength | Soil stabilization | Soft soils | Sea floor | Soil water | Soil grouting | Structural strength | Arctic

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