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Ground Failure

Geotechnical and Surface Wave Investigation of the Great M 7.9 Denali Fault Earthquake of 3 November 2002
 
Index Back to Home PageAbout these Web PagesGeneral ObservationsAcknowledgmentsSASW-Site Characterization of Pump Stations 9, 10, and 11Earthquake Effects on the Trans-Alaska PipelineLiquefaction Damage at Northway AirportIndex Map 2Surface Wave TestingSpacial CharacterLiquefaction and Ground DisplacementIndex Map 1Abstract

Earthquake Effects on the Trans-Alaska Pipeline (TAPS)
 

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Trans-Alaska Pipeline at the Denali Fault.
 		 Pipeline shoe.
 
Pipeline damage.
 		 Pipeline damage.
 

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Pipeline anchor-points skidding evidence.
 		 48" pipe pushed to the limit.
 
No static offset cushion.
 		 Impact of pipe against vertical side supports.
 

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Liquefaction and fissureing of pipeline backfill. Where the Denali fault crossed the trans-Alaska pipeline, dislocation occurred along a series of en echelon fissures resulting in 5.5 meters of right-lateral offset and 0.6 meters of up-to-the-north vertical displacement. 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.


 

 
Abstract | Index Map 1 | Liquefaction and Ground Displacement | Spacial Character | Surface Wave Testing
Index Map 2 | Liquefaction Damage at Northway Airport | Earthquake Effects on the Trans-Alaska Pipeline
SASW-Site Characterization of Pump Stations 9,10 &11 | Acknowledgments | General Observations | About These Web Pages
Geotech Home Page


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http://walrus.wr.usgs.gov/geotech/denaligeoposter/earthquake.html
maintained by Diane Minasian
For further information PLEASE CONTACT: Robert Kayen
last modified 6 January 2005

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