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Author(s):	Lohaus, Ludger; Lindschulte, Nick; Scholle, Niklas; Werner, Michael
Title:
Abstract:	Grouted Joints haben sich für kraftschlüssige Verbindungen zwischen Gründungspfählen und der Tragstruktur von Offshore-Windenergie-Anlagen (OWEA) etabliert. Für die Herstellung werden hochfeste Vergussmörtel oder -betone eingesetzt, die unter den spezifischen Bedingungen offshore zu verarbeiten sind. In diesem Beitrag werden baustoffliche und bauausführungstechnische Fragen diskutiert. Neben den Anforderungen an das Material im frischen und im erhärteten Zustand wird auf die Verwendung von Stahlfasern vor dem Hintergrund ihrer Wirksamkeit und ihrer Verarbeitungsrisiken eingegangen. Darüber hinaus wird die Bauteiltragwirkung unter Berücksichtigung einer Stützwirkung der umgebenden Stahlelemente und einer Stahlfaserwirkung anhand von durchgeführten Versuchen dargestellt. Concrete technology for grouted joints - requirements for building materials and execution techniques. Grouted Joints present force-fitted connections between foundation pile and support structure of offshore wind turbines. High strength mortar or concrete (grout) are used and have to be executed under special offshore conditions. This article considers special items for building materials and the offshore execution of grouted joints. Requirements of the fresh and hardened properties of grout materials will be elucidated and the use of steel fibres due to opportunities and risks will be discussed. Furthermore the load bearing behaviour of the component structure will be presented by performed tests. The confinement effect of the tube-in-tube-construction as well as the implication of steel fibers has been taken into account.
Source:	Stahlbau 81 (2012), No. 9
Page/s:	689-694
Language of Publication:	German

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