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RESEARCH PAPERS: Offshore Mechanics/Ocean Engineering/Arctic Engineering

The Trans-Alaska Pipeline System Synthetically Insulated Workpad—An Evaluation of Present Conditions

[+] Author and Article Information
E. S. Clarke

Clarke Engineering Corporation, Fairbanks, Alaska 99706

T. G. Krzewinski

Dames and Moore, Anchorage, Alaska 99501

M. C. Metz

GeoTec Services, Inc., Golden, Colo. 80401

J. Energy Resour. Technol 105(2), 230-235 (Jun 01, 1983) (6 pages) doi:10.1115/1.3230908 History: Received March 12, 1982; Revised February 05, 1983; Online October 22, 2009

Abstract

The purpose of the insulated workpad study, described in the following paper, was twofold. First, the owners of the Trans-Alaska Pipeline System (TAPS) needed an evaluation of present conditions of the insulated pad to determine the feasibility of plans by builders of the Alaska Natural Gas Transportation System (ANGTS) to reuse the TAPS workpad for parallel construction. Secondly, since the integrity of the elevated support system used by TAPS in insulated workpad areas was dependent on the insulation maintaining a shallow active layer, it was important for Alyeska (the operator of TAPS) to be assured that the insulated pad was performing as designed. The fieldwork undertaken for the study included test pitting and probing to determine the depth of thaw, sampling the insulation, and installing thermistors for long-term temperature monitoring. The insulation samples were tested for several parameters. Total performance of the workpad was better than expected, although several types of problems were encountered. Most were related to construction practices or postconstruction activity.

Copyright © 1983 by ASME
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