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The Great M7.9 Denali Fault, Alaska, Earthquake of November 3, 2002: Geotechnical Engineering Reconnaissance

Index Back to home page About these web pages Trans-Alaska Pipeline Liquefaction and ground displacement Ice shatter Liquefaction and lateral displacement Introduction
Trans-Alaska Pipeline
Trans Alaska pipeline pushed to limits of supports. Damaged pipeline.
No static offset cushion. Failed cross members.
Where the fault crossed the trans-Alaska pipeline, dislocation occurred along a series of en echelon fissures. One of these en echelon breaks intersected the end of one of the Teflon surfaced skids (sleepers) that supports the pipe in the fault zone,displacing it about a meter but not damaging the pipe. Strong shaking and movement of the pipe resulted in damage to 8 horizontal support members, and 9 anchored supports near the fault crossing. These affects were not critical to the integrity of the pipeline, which performed well during the event.

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Flange damage on several anchors. Shattered pipe housing
Elevated to ground level pipe transitions. Vertical offset fifts pipe and Teflon shoe.

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last modified 1 December 2003 (lzt)
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