Suspension Bridge For Loading LNG in Equatorial Guinea (eBook)

Published Date

January 2006

Suspension Bridge For Loading LNG in Equatorial Guinea (eBook)

(Excludes any applicable taxes)

This paper discusses the challenges and solutions of designing, fabricating and constructing the suspension bridge and piping for EG LNG Train 1. (43pp)

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Equatorial Guinea LNG Holdings Limited, through a subsidiary, is currently constructing a greenfield 3.4 mmtpa (contracted rate) LNG plant located on Bioko Island in the Gulf of Guinea. Bechtel Corporation was awarded an Engineering, Procurement and Construction contract in April 2004 to build the plant, which utilizes the ConocoPhillips Optimized Cascade LNG Process. First LNG cargo is anticipated in mid-2007.

The Project Management Team has been faced with many challenges typical of those experienced building grass roots facilities in remote locations as well as some unusual ones. One unique problem was finding an acceptable solution to transport LNG from the elevated plant site down a steep, unstable 60 meter high slope to the marine loading jetty. The slope, comprised of ancient relic landslides,is still in an unstable condition and is susceptible to movements that would damage a conventional pipe rack structure. A full suite of geotechnical solutions were studied to improve the slope stability to an acceptable safety factor. However, the cost of implementing these solutions was very high, and the PMT looked for an alternate solution that would take the unstable slope out of play.

The solution chosen is a 350 meter long suspension bridge that spans from the stable soils at the top of the slope to the stable soils 70 meters offshore. The bridge supports the LNG loading pipelines, utility piping, and power and instrumentation cabling. It is also the primary access way for operational personnel to the jetty since the unstable soils also precluded building a permanent access road to the jetty head.

Paper Delivered by:
Al Chernosky (Marathon Oil Corporation)
Andy McGhie

Prepared for:
Gastech Abu Dhabi 2006

For over 45 years, the Gastech Exhibition & Conference has been at the forefront of the international gas and LNG market. This world-renowned event is regarded as the most significant meeting place for gas and LNG professionals, where the global industry gathers to do business.

Gastech hosts major IOCs, NOC’s, global utility companies, EPC contractors, shipbuilders, pipeline companies, manufacturers, distributors, technology and service providers, all who play an active role in the global energy value chain.

Title: Suspension Bridge For Loading LNG in Equatorial Guinea (eBook)
Product Code: 4433g114
Published Date: January 2006

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