Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Scour Protection with Geotextile Sand Containers on Foundation Structures of Offshore Wind Turbines
The foundation of offshore wind turbines (OWT) causes a change in the hydrodynamic and morphodynamic processes in the near field of the foundation structure. As a result, erosion and scouring occur on the unprotected sea bed, which already occur during the construction phase and continue to develop over time. The scouring process itself represents a dynamic but also self-limiting process with a theoretical final depth up to a state of equilibrium. Since scour can significantly impair the stability of the OWT foundation, appropriately dimensioned scour protection is required as a safety measure for the foundation structures. From a technical and structural point of view, scour protection measures in the foundation area of structures do not differ from standard construction methods for slope and bottom protection. Both systems require a filter for a stable boundary layer against the subsoil to be protected (soil to be filtered) without affecting the water permeability, as well as a top layer that must sufficiently resist hydrodynamic attacks. Sand-filled geotextile containers made of needle-punched nonwoven filter geotextiles (GSCs) combine the two scour protection elements of filter and top layer required for technical and structural reasons and similarly reproduce the ecological bed environment at offshore wind turbine foundations. Multi-layered systems of mineral grain filter layers and stone revetments are completely unnecessary. The article presents the technology, project experience, and regulations and shows the possible advantages of sand-filled nonwoven containers compared to conventional scour protection methods.
Scour Protection with Geotextile Sand Containers on Foundation Structures of Offshore Wind Turbines
The foundation of offshore wind turbines (OWT) causes a change in the hydrodynamic and morphodynamic processes in the near field of the foundation structure. As a result, erosion and scouring occur on the unprotected sea bed, which already occur during the construction phase and continue to develop over time. The scouring process itself represents a dynamic but also self-limiting process with a theoretical final depth up to a state of equilibrium. Since scour can significantly impair the stability of the OWT foundation, appropriately dimensioned scour protection is required as a safety measure for the foundation structures. From a technical and structural point of view, scour protection measures in the foundation area of structures do not differ from standard construction methods for slope and bottom protection. Both systems require a filter for a stable boundary layer against the subsoil to be protected (soil to be filtered) without affecting the water permeability, as well as a top layer that must sufficiently resist hydrodynamic attacks. Sand-filled geotextile containers made of needle-punched nonwoven filter geotextiles (GSCs) combine the two scour protection elements of filter and top layer required for technical and structural reasons and similarly reproduce the ecological bed environment at offshore wind turbine foundations. Multi-layered systems of mineral grain filter layers and stone revetments are completely unnecessary. The article presents the technology, project experience, and regulations and shows the possible advantages of sand-filled nonwoven containers compared to conventional scour protection methods.
Scour Protection with Geotextile Sand Containers on Foundation Structures of Offshore Wind Turbines
Lecture Notes in Civil Engineering
Duc Long, Phung (Herausgeber:in) / Dung, Nguyen Tien (Herausgeber:in) / Pries, Janne Kristin (Autor:in) / Ngoc, Hoang Nguyen (Autor:in)
International Conference on Geotechnics for Sustainable Infrastructure Development ; 2023 ; Hanoi, Vietnam
Proceedings of the 5th International Conference on Geotechnics for Sustainable Infrastructure Development ; Kapitel: 201 ; 2895-2906
11.07.2024
12 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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