NDLI: A Submerged Floating Tube Bridge Concept for the Bjørnafjord Crossing: Marine Operations

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Engebretsen, Knut Beck Jakobsen, Kristoffer Kjellså Haugerud, Stein Atle Minoretti, Arianna
Copyright Year	2017
Abstract	A submerged floating tube bridge (SFTB) concept is one of the three alternatives for the Bjørnafjord crossing in Norway. Two SFTB designs have been developed: one pontoon-stabilized and one tether-stabilized. There are no submerged floating tube bridges yet built and installed. Consequently there is no direct practical experience with assembly and installation of such massive string-like structures. The purpose of this article is to describe possible means of fabrication, assembling, jointing and installation of SFTB elements and the tube-bridge itself. All major project activities have been divided into stages. Further, these stages have been subdivided into factual steps to demonstrate feasibility based on various criteria. The major construction challenge is to assembly fabricated SFTB elements into one 4580 m string in a floating condition and then to tow and install it in the fjord. The focus was to utilize existing technologies and experiences available from offshore industry to the fullest extent, so that conventional tools and methods could be applied to this new application. Possible solutions both for the tether-stabilized and pontoon-stabilized alternatives — with differences in the foundation/tether and pontoon installations and associated SFTB interfaces — have been developed.
Sponsorship	Ocean, Offshore and Arctic Engineering Division
File Format	PDF
ISBN	9780791857748
DOI	10.1115/OMAE2017-61309
Volume Number	Volume 7B: Ocean Engineering
Conference Proceedings	ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering
Language	English
Publisher Date	2017-06-25
Publisher Place	Trondheim, Norway
Access Restriction	Subscribed
Subject Keyword	Bridges (structures) Ocean engineering Construction Manufacturing String
Content Type	Text
Resource Type	Article

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