Loading Mechanisms in Thawed Permafrost Around Arctic Wells

[+] Author and Article Information
M. A. Goodman

Enertech Engineering and Research Co., Houston, Tex.

J. Pressure Vessel Technol 99(4), 641-645 (Nov 01, 1977) (5 pages) doi:10.1115/1.3454587 History: Received June 02, 1977; Online October 25, 2010


Four permafrost thaw-subsidence loading mechanisms are described for inducing casing strain. Phase change contraction in ice rich soil and consolidation with fluid flow are more likely to occur in surface and near surface soils. Stiffness reduction and pore pressure reduction are important in deep permafrost and generate body force-type loads. The equations for stiffness reduction loading are presented in terms of an elastic model. The effects of lithology and thaw variations on casing loads are examined in the context of the four mechanisms.

Copyright © 1977 by ASME
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