EP2386691A1 - Method and device for scour protection on offshore structures - Google Patents

Method and device for scour protection on offshore structures Download PDF

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Publication number
EP2386691A1
EP2386691A1 EP11175151A EP11175151A EP2386691A1 EP 2386691 A1 EP2386691 A1 EP 2386691A1 EP 11175151 A EP11175151 A EP 11175151A EP 11175151 A EP11175151 A EP 11175151A EP 2386691 A1 EP2386691 A1 EP 2386691A1
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Prior art keywords
plates
elastic plates
elastic
offshore structures
offshore
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German (de)
French (fr)
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Anton Kanand
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
    • E02B3/122—Flexible prefabricated covering elements, e.g. mats, strips
    • E02B3/126—Flexible prefabricated covering elements, e.g. mats, strips mainly consisting of bituminous material or synthetic resins
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/0017—Means for protecting offshore constructions
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
    • E02B3/122—Flexible prefabricated covering elements, e.g. mats, strips
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B5/00—Artificial water canals, e.g. irrigation canals
    • E02B5/02—Making or lining canals
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/20—Securing of slopes or inclines

Definitions

  • the invention relates to a device and a method for the Kolkschutz of offshore structures.
  • Verkulkung is understood to mean erosion phenomena of a water-covered ground due to currents in the area of the offshore structures.
  • a disadvantage of known protective measures is that they are complex but nevertheless inadequate in terms of their protective effect.
  • Offshore e.g. in monopiles of wind turbines, it is state of the art, as Kolkschutz about 300 to 1000 t réelle slaughter stones. However, these stones produce harmful currents that prevent sedimentation of sand and thus accelerate the Verkolkung even.
  • a third, often used possibility is therefore to use no Kolkschutz at all, to accept a Verkulkung and hope that the forming Verkupkung a certain depth does not exceed.
  • the foundation needs a depth of this depth Monopiles but then placed deeper into the seabed, which causes higher construction costs.
  • submarine cables of the offshore structure laid by the Verkulkung can be scavenged and / or its connections damaged or destroyed by flow.
  • the object of the invention is therefore to propose an apparatus and a method for the anti-collapse of offshore structures, which offer a durable, cost-effective and thereby an effective protection.
  • the device for the anti-collapse of offshore structures one or more rubber elastic plates having weight elements for fixing the plates at the points to be protected, wherein the weight elements each at an end portion of the elastic plate or the interconnected elastic plates are mounted to pull down or press the elastic plate or the elastic plates at their end portions or so as to form a curved, hydrodynamic shape.
  • the back or the underside of the plates serves as a support surface for the substrate and the front or the top of the plates serves as a ramp surface and protection against erosive sand and water vortex.
  • the sheets of rubber can be laid under the water or sea surface directly on the sand or soil surface in the area of offshore structures or even completely or partially under the soil surface.
  • the elastic plates are made of rubber fixed with weight elements at the points to be protected. A surprising effect results from the fact that the weight elements are attached to the lateral end portions of the elastic plate or the interconnected elastic plates.
  • the surface formed by the plates Due to the force exerted by the weight elements on the plates and the force due to their elasticity, restoring force, the surface formed by the plates is curved and it forms a particularly favorable hydrodynamic shape, which serves as a ramp surface for water or pressure waves.
  • the force of the pressure waves is absorbed, absorbed and derived from the offshore structures. Should the ground sag or undercut beneath the weight member, then the weight member moves down together with the panel, restoring the protective effect.
  • a submarine cable laid under the rubber elastic plates is optimally protected and increases the operational safety of the system.
  • the proposed device for Kolkschutz has in the offshore area also has the advantage that it can be dismantled with a single crane stroke and leaves an obstacle-free seabed.
  • Suitable elastic panels are available in an area of about one square meter or as rolls several meters wide and up to several hundred meters long. They can be transported as rolls to the places to be protected and then unrolled and laid there. The elastic plates are bonded together by vulcanization or mechanically by means of connecting means. As a result, larger sections in the area of a vulnerable offshore structure can be protected. An optional watertight connection of the panels prevents under-flushing of the substrate.
  • the flexibility or stiffness of the panels is adjusted as required by the fact that the elastic panels have one or more inserts, in particular made of textile fabric, or a reinforcement of steel rods, steel wires or steel cables in the material.
  • the plates can then absorb greater compressive and tensile forces.
  • the elastic panels can have additional, external stiffening elements in addition to the above-mentioned inserts or the reinforcement.
  • stiffening elements are, for example, metal profiles or concrete beams.
  • the plates can also be stiffened in one direction by an inner steel reinforcement and in the other direction additionally by the stiffening elements arranged, for example, on the surface. Due to their weight, the stiffening elements can also serve as additional fastening means.
  • the invention also relates to a process for the scour protection of offshore structures.
  • a device is fixed according to claim 1 at the points to be protected in the field of offshore structures.
  • the device may also have features claimed in claims 2 to 5, respectively.
  • FIG. 1 shows an overall view of the device 1 as Kolkschutz with a Monopile 301 in vertical section.
  • Such Monopile 301 are rammed into the seabed 37 concrete pillars and are used for example as a carrier for wind turbines or derricks. Due to water currents, monolayers 301 or other offshore structures are subject to clouding 302, ie in the area of structure 301, the sand is flushed away and a scraper is formed.
  • the device 1 which in the embodiment shown essentially consists of the interconnected elastic plates 2 and concrete elements 73 at the edges or end regions of the elastic plates 2, the monopile 301 can be effectively protected from being worn.
  • Reference numeral 302 indicates that the surface of the sand 20 in the area of the monopile 301 has been flushed away on the surface, but further continuation of flushing by the elastic plates 2 bearing the monopile 301 has been prevented.
  • the concrete elements 73 pull the plates 2 down and thus provide a hydrodynamic favorable form of the device 1. They also serve as a fastener, so that if the Kolkschutz does not exceed a certain size, situation-dependent can be dispensed with other suitable fastening means.
  • the elastic panels 2 may be both single-layered and waterproof, as well as multi-layered panels which are permeable to water but retain sand.
  • the elastic plates may have one or more inserts, in particular made of textile fabric, or a reinforcement of steel rods, steel wires or steel cables in the material. You may alternatively or additionally have external stiffening elements, in particular metal profiles. Thereby, the flexibility or rigidity of the plates can be adjusted as needed to avoid excessive deformation and to form an optimum hydrodynamic shape.
  • the in the FIG. 1 shown embodiment of the device 1 is not limited to the illustrated use of monopiles 301, but can be used in the manner shown for all types of offshore structures or for foundations of offshore underwater structures.

Abstract

The device (1) comprises one or more elastic plates (2) and a fixing unit (3) for fixing the plates to the points to be protected. The elastic plates are made of rubber, and comprise a certain thickness. The elastic plates comprises one or more insertion units made of textile fabric, or a reinforcing unit made of steel bar, steel wire or steel cable. The elastic plates are connected in a waterproof manner by curing or mechanically by connecting units. An independent claim is included for a method for flood protection, coastal protection and scour protection.

Description

Die Erfindung betrifft eine Vorrichtung und ein Verfahren für den Kolkschutz von Offshore-Bauwerken. Unter Verkolkung werden Erosionserscheinungen eines wasserbedeckten Bodens durch Strömungen im Bereich der Offshore-Bauwerke verstanden. Ein Nachteil von bekannten Schutzmaßnahmen ist, dass sie aufwändig aber dennoch hinsichtlich ihrer Schutzwirkung unzureichend sind. Im Offshore-Bereich, z.B. bei Monopiles von Windkraftanlagen, ist es Stand der Technik, als Kolkschutz ca. 300 bis 1000 t Steine aufzuschichten. Diese Steine erzeugen jedoch schädliche Strömungen, die eine Sedimentation von Sand verhindern und auf diese Weise die Verkolkung sogar beschleunigen. Zusätzlich besteht die Gefahr, dass fallende oder durch die Strömung absinkende, unterspülte Steine den Seekabelanschluss der Offshore-Windkraftanlage beschädigen.The invention relates to a device and a method for the Kolkschutz of offshore structures. Verkulkung is understood to mean erosion phenomena of a water-covered ground due to currents in the area of the offshore structures. A disadvantage of known protective measures is that they are complex but nevertheless inadequate in terms of their protective effect. Offshore, e.g. in monopiles of wind turbines, it is state of the art, as Kolkschutz about 300 to 1000 t aufzuschichten stones. However, these stones produce harmful currents that prevent sedimentation of sand and thus accelerate the Verkolkung even. In addition, there is a risk that falling or sinking under the flow, undermined stones damage the submarine cable connection of the offshore wind turbine.

Es ist auch bekannt, mit Sand gefüllte, über 1000 kg schwere Geotextil-Container als Kolkschutz zu verwenden. Dabei kann jedoch nicht sichergestellt werden, dass diese ihre einmal eingenommene Lage am Meeresboden beibehalten. Sie bilden außerdem einen Winkel zum Meeresboden und können dadurch sogar eine Verkolkung begünstigen. Ebenfalls können diese Container und Steine durch Strömungsereignisse in den Meeresboden einsinken und müssen in diesem Fall immer neu eingebracht werden, was laufende Kosten verursacht. Auch hier ist eine Beschädigung des Seekabels denkbar. Außerdem können sowohl Steine als auch Container ab einer bestimmten Wassertiefe nicht mehr ortsgenau eingebracht werden.It is also known to use sand filled, over 1000 kg heavy geotextile containers as Kolkschutz. However, it can not be ensured that they maintain their once occupied position on the seabed. They also form an angle to the seabed and can even promote a Verkolkung. Also, these containers and stones can sink by flow events in the seabed and must be introduced in this case always new, causing ongoing costs. Again, damage to the submarine cable is conceivable. In addition, both stones and containers from a certain depth of water can not be introduced accurately.

Eine dritte, häufig angewandte Möglichkeit besteht deshalb darin, überhaupt keinen Kolkschutz zu verwenden, eine Verkolkung in Kauf zu nehmen und dabei zu hoffen, dass die sich bildende Verkolkung eine gewisse Tiefe nicht überschreitet. Um diese Tiefe muss das Fundament beispielsweise eines Monopiles dann aber tiefer in den Meeresboden gesetzt werden, was höhere Baukosten verursacht. Zudem können durch die Verkolkung verlegte Seekabel des Offshore-Bauwerkes freigespült und/oder dessen Anschlüsse durch Strömungseinwirkung beschädigt oder zerstört werden.A third, often used possibility is therefore to use no Kolkschutz at all, to accept a Verkulkung and hope that the forming Verkupkung a certain depth does not exceed. For example, the foundation needs a depth of this depth Monopiles but then placed deeper into the seabed, which causes higher construction costs. In addition, submarine cables of the offshore structure laid by the Verkulkung can be scavenged and / or its connections damaged or destroyed by flow.

Sowohl Steine als auch Container können nach Rückbau der Anlagen einen dauernden Gefahrenpunkt für die Fischerei bilden, da diese Vorrichtungen aufgrund der sehr hohen Kosten in der Regel nicht demontiert werden.Both stones and containers can form a permanent danger point for the fishery after dismantling of the plants, since these devices are not dismantled due to the very high costs in the rule.

Aufgabe der Erfindung ist es daher, eine Vorrichtung und ein Verfahren für den Kolkschutz von Offshore-Bauwerken vorzuschlagen, die einen haltbaren, kostengünstigen und dabei einen wirksamen Schutz bieten.The object of the invention is therefore to propose an apparatus and a method for the anti-collapse of offshore structures, which offer a durable, cost-effective and thereby an effective protection.

Diese Aufgabe wird dadurch gelöst, dass die Vorrichtung für den Kolkschutz von Offshore-Bauwerken eine oder mehrere elastische Platten aus Gummi mit Gewichtselementen zur Fixierung der Platten an den zu schützenden Stellen aufweist, wobei die Gewichtselemente jeweils an einem Endbereich der elastischen Platte oder der miteinander verbundenen elastischen Platten befestigt sind, um die elastische Platte oder die elastischen Platten an ihren Endbereichen nach unten zu ziehen oder zu drücken und so eine gekrümmte, hydrodynamische Form auszubilden. Die Rückseite bzw. die Unterseite der Platten dient als Auflagefläche für den Untergrund und die Vorderseite bzw. die Oberseite der Platten dient als Auflauffläche und Schutz gegen abtragende Sand- und Wasserwirbel. Die Platten aus Gummi können unter der Wasser- bzw. Meeresoberfläche direkt auf die Sand- bzw. Bodenoberfläche im Bereich der Offshore-Bauwerke verlegt werden oder auch vollständig oder zum Teil unter der Bodenoberfläche liegen. Sie haben dabei den Vorteil, dass sie sich dem Verlauf der Bodenoberfläche anpassen und durch ihre elastischen Eigenschaften die Energie der Wellen und Wirbel aufnehmen können. Weiterhin sind sie beständig gegenüber Salzwasser und es tritt keine Korrosion auf. Durch die Widerstandsfähigkeit und Haltbarkeit des Gummis ist die Vorrichtung somit wartungsfrei. Das Gummi kann aus Naturkautschuk umweltfreundlich hergestellt sein. Ein weiterer Vorteil ist, dass die Vorrichtung bei einer Kollision mit Wasserfahrzeugen ungefährlich ist. Die elastischen Platten aus Gummi werden mit Gewichtselementen an den zu schützenden Stellen fixiert. Eine überraschende Wirkung ergibt sich daraus, dass die Gewichtselemente an den seitlichen Endbereichen der elastischen Platte oder der miteinander verbundenen elastischen Platten befestigt sind. Durch die von den Gewichtselementen auf die Platten ausgeübte Kraft und die durch deren Elastizität bedingte, rückstellende Kraft wird die von den Platten gebildete Fläche gekrümmt und es bildet sich eine besonders günstige, hydrodynamische Form aus, die als Auflauffläche für Wasser- bzw. Druckwellen dient. Die Kraft der Druckwellen wird aufgenommen, absorbiert und von den Offshore-Bauwerken abgeleitet. Sollte der Boden unterhalb des Gewichtselementes wegsacken oder unterspült werden, dann bewegt sich das Gewichtselement zusammen mit der Platte nach unten, wodurch die Schutzwirkung wiederhergestellt wird. Ein unter den elastischen Platten aus Gummi verlegtes Seekabel ist optimal geschützt und erhöht die Betriebssicherheit der Anlage. Die vorgeschlagene Vorrichtung für den Kolkschutz hat im Offshore-Bereich weiterhin den Vorteil, dass sie mit einem einzigen Kranhub rückgebaut werden kann und einen hindernisfreien Meeresboden zurücklässt.This object is achieved in that the device for the anti-collapse of offshore structures, one or more rubber elastic plates having weight elements for fixing the plates at the points to be protected, wherein the weight elements each at an end portion of the elastic plate or the interconnected elastic plates are mounted to pull down or press the elastic plate or the elastic plates at their end portions or so as to form a curved, hydrodynamic shape. The back or the underside of the plates serves as a support surface for the substrate and the front or the top of the plates serves as a ramp surface and protection against erosive sand and water vortex. The sheets of rubber can be laid under the water or sea surface directly on the sand or soil surface in the area of offshore structures or even completely or partially under the soil surface. They have the advantage that they adapt to the course of the soil surface and can absorb the energy of the waves and vortices by their elastic properties. Furthermore, they are resistant to salt water and there is no corrosion. Due to the resistance and durability of the rubber, the device is thus maintenance-free. The rubber can be made of natural rubber environmentally friendly. Another advantage is that the device is safe in a collision with watercraft. The elastic plates are made of rubber fixed with weight elements at the points to be protected. A surprising effect results from the fact that the weight elements are attached to the lateral end portions of the elastic plate or the interconnected elastic plates. Due to the force exerted by the weight elements on the plates and the force due to their elasticity, restoring force, the surface formed by the plates is curved and it forms a particularly favorable hydrodynamic shape, which serves as a ramp surface for water or pressure waves. The force of the pressure waves is absorbed, absorbed and derived from the offshore structures. Should the ground sag or undercut beneath the weight member, then the weight member moves down together with the panel, restoring the protective effect. A submarine cable laid under the rubber elastic plates is optimally protected and increases the operational safety of the system. The proposed device for Kolkschutz has in the offshore area also has the advantage that it can be dismantled with a single crane stroke and leaves an obstacle-free seabed.

Es hat sich gezeigt, dass ein besonders guter Schutz erzielt wird, wenn die Platte eine Dicke von etwa 2 cm aufweist. Geeignete elastische Platten sind mit einer Fläche von etwa einem Quadratmeter oder als Rollen mit einer Breite von einigen Metern und einer Länge von bis zu mehreren hundert Metern erhältlich. Sie können als Rollen zu den zu schützenden Stellen transportiert und dann dort abgerollt und verlegt werden. Die elastischen Platten werden mittels Vulkanisierung oder mechanisch mittels Verbindungsmitteln miteinander verbunden. Hierdurch können größere Abschnitte im Bereich eines gefährdeten Offshore-Bauwerkes geschützt werden. Eine optionale wasserdichte Verbindung der Platten verhindert eine Unterspülung des Untergrunds.It has been found that a particularly good protection is achieved when the plate has a thickness of about 2 cm. Suitable elastic panels are available in an area of about one square meter or as rolls several meters wide and up to several hundred meters long. They can be transported as rolls to the places to be protected and then unrolled and laid there. The elastic plates are bonded together by vulcanization or mechanically by means of connecting means. As a result, larger sections in the area of a vulnerable offshore structure can be protected. An optional watertight connection of the panels prevents under-flushing of the substrate.

Die Flexibilität oder Steifigkeit der Platten wird je nach Bedarf dadurch angepasst, dass die elastischen Platten eine oder mehrere Einlagen, insbesondere aus textilem Gewebe, oder eine Armierung aus Stahlstäben, Stahldrähten oder Stahlseilen im Material aufweisen. Die Platten können dann größere Druck- und Zugkräfte aufnehmen.The flexibility or stiffness of the panels is adjusted as required by the fact that the elastic panels have one or more inserts, in particular made of textile fabric, or a reinforcement of steel rods, steel wires or steel cables in the material. The plates can then absorb greater compressive and tensile forces.

Um eine übermäßige Verformung der elastischen Platten zu vermeiden, beispielsweise durch Sogkräfte, können die elastischen Platten neben den oben genannten Einlagen oder der Armierung zusätzliche, externe Versteifungselemente aufweisen. Als Versteifungselemente eignen sich zum Beispiel Metallprofile oder Betonbalken. Die Platten können außerdem in einer Richtung durch eine innere Stahlarmierung und in der anderen Richtung zusätzlich durch die beispielsweise auf der Oberfläche angeordneten Versteifungselemente versteift werden. Durch ihr Gewicht können die Versteifungselemente auch als zusätzliches Befestigungsmittel dienen.In order to avoid excessive deformation of the elastic panels, for example by suction forces, the elastic panels can have additional, external stiffening elements in addition to the above-mentioned inserts or the reinforcement. As stiffening elements are, for example, metal profiles or concrete beams. The plates can also be stiffened in one direction by an inner steel reinforcement and in the other direction additionally by the stiffening elements arranged, for example, on the surface. Due to their weight, the stiffening elements can also serve as additional fastening means.

Die Erfindung betrifft außerdem ein Verfahren für den Kolkschutz von Offshore-Bauwerken. Bei dem Verfahren wird eine Vorrichtung nach Anspruch 1 an den zu schützenden Stellen im Bereich von Offshore-Bauwerken fixiert. Zur Durchführung dieses Verfahrens kann die Vorrichtung außerdem Merkmale aufweisen, die jeweils in den Ansprüchen 2 bis 5 beansprucht sind.The invention also relates to a process for the scour protection of offshore structures. In the method, a device is fixed according to claim 1 at the points to be protected in the field of offshore structures. For carrying out this method, the device may also have features claimed in claims 2 to 5, respectively.

Eine bevorzugte Ausführungsformen der Erfindung wird unter Bezugnahme auf eine Zeichnung beispielhaft beschrieben, wobei weitere vorteilhafte Einzelheiten der Figur der Zeichnung zu entnehmen sind.A preferred embodiment of the invention will be described by way of example with reference to a drawing, wherein further advantageous details of the figure of the drawing can be seen.

Figur 1 zeigt eine Gesamtansicht der Vorrichtung 1 als Kolkschutz mit einem Monopile 301 im Vertikalschnitt. Derartige Monopile 301 sind in den Meeresboden 37 gerammte Betonpfeiler und werden beispielsweise als Träger für Windkraftanlagen oder Bohrtürme verwendet. Aufgrund von Wasserströmungen kommt es in der Nähe von Monopilen 301 oder anderen Offshore-Bauwerken zur Verkolkung 302, d.h. im Bereich des Bauwerks 301 wird der Sand fortgespült und es bildet sich ein Kolktrichter aus. Durch die Vorrichtung 1, die bei der gezeigten Ausführungsform im Wesentlichen aus den miteinander verbundenen elastischen Platten 2 und Betonelementen 73 an den Rändern bzw. Endbereichen der elastischen Platten 2 besteht, kann der Monopile 301 effektiv vor Verkolkung geschützt werden. Mit der Bezugsziffer 302 ist dargestellt, dass die Sandoberfläche 20 im Bereich des Monopiles 301 oberflächlich fortgespült wurde, aber eine weitere Fortspülung durch die dem Monopile 301 anliegenden elastischen Platten 2 verhindert wurde. Die Betonelemente 73 ziehen die Platten 2 nach unten und sorgen so für eine hydrodynamisch günstige Form der Vorrichtung 1. Sie dienen außerdem als Befestigungselement, so dass, wenn der Kolkschutz eine bestimmte Größe nicht überschreitet, situationsgebunden auf andere geeignete Befestigungsmittel verzichtet werden kann. Die elastischen Platten 2 können sowohl einschichtige und wasserundurchlässige als auch mehrschichtige Platten sein, die wasserdurchlässig sind, aber Sand zurückhalten. Die elastischen Platten können eine oder mehrere Einlagen, insbesondere aus textilem Gewebe, oder eine Armierung aus Stahlstäben, Stahldrähten oder Stahlseilen im Material aufweisen. Sie können alternativ oder zusätzlich externe Versteifungselemente, insbesondere Metallprofile aufweisen. Hierdurch können die Flexibilität oder Steifigkeit der Platten je nach Bedarf angepasst werden, um eine übermäßige Verformung zu vermeiden und eine optimale hydrodynamische Form auszubilden. FIG. 1 shows an overall view of the device 1 as Kolkschutz with a Monopile 301 in vertical section. Such Monopile 301 are rammed into the seabed 37 concrete pillars and are used for example as a carrier for wind turbines or derricks. Due to water currents, monolayers 301 or other offshore structures are subject to clouding 302, ie in the area of structure 301, the sand is flushed away and a scraper is formed. By means of the device 1, which in the embodiment shown essentially consists of the interconnected elastic plates 2 and concrete elements 73 at the edges or end regions of the elastic plates 2, the monopile 301 can be effectively protected from being worn. Reference numeral 302 indicates that the surface of the sand 20 in the area of the monopile 301 has been flushed away on the surface, but further continuation of flushing by the elastic plates 2 bearing the monopile 301 has been prevented. The concrete elements 73 pull the plates 2 down and thus provide a hydrodynamic favorable form of the device 1. They also serve as a fastener, so that if the Kolkschutz does not exceed a certain size, situation-dependent can be dispensed with other suitable fastening means. The elastic panels 2 may be both single-layered and waterproof, as well as multi-layered panels which are permeable to water but retain sand. The elastic plates may have one or more inserts, in particular made of textile fabric, or a reinforcement of steel rods, steel wires or steel cables in the material. You may alternatively or additionally have external stiffening elements, in particular metal profiles. Thereby, the flexibility or rigidity of the plates can be adjusted as needed to avoid excessive deformation and to form an optimum hydrodynamic shape.

Die in der Figur 1 gezeigte Ausführungsform der Vorrichtung 1 ist nicht auf die dargestellte Verwendung an Monopiles 301 beschränkt, sondern kann in der gezeigten Weise für alle Arten von Offshore-Bauwerken oder für Fundamente von Offshore-Unterwasserbauwerken verwendet werden.The in the FIG. 1 shown embodiment of the device 1 is not limited to the illustrated use of monopiles 301, but can be used in the manner shown for all types of offshore structures or for foundations of offshore underwater structures.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1.1.
Schutzvorrichtungguard
2.Second
Elastische PlattenElastic plates
10.10th
Wasseroberflächewater surface
20.20th
Sandoberflächesand surface
73.73rd
Gewichtselementeweight elements
301301
Monopilemonopile
302302
VerkolkungVerkolkung

Claims (6)

Vorrichtung (1) für den Kolkschutz von Offshore-Bauwerken, dadurch gekennzeichnet, dass die Vorrichtung (1) eine oder mehrere elastische Platten (2) aus Gummi mit Gewichtselementen (73) zur Fixierung der Platten (2) an den zu schützenden Stellen im Bereich der Offshore-Bauwerke aufweist, wobei die Gewichtselemente (73) jeweils an einem Endbereich der elastischen Platte (2) oder der miteinander verbundenen elastischen Platten (2) befestigt sind, um die elastische Platte (2) oder die elastischen Platten (2) an ihren Endbereichen nach unten zu ziehen oder zu drücken und so eine gekrümmte, hydrodynamische Form auszubilden.Device (1) for the scour protection of offshore structures, characterized in that the device (1) one or more elastic plates (2) made of rubber with weight elements (73) for fixing the plates (2) at the points to be protected in the area of the offshore structures, wherein the weight members (73) are respectively fixed to an end portion of the elastic plate (2) or the interconnected elastic plates (2) to attach the elastic plate (2) or the elastic plates (2) to one another Pull or push down end portions and so form a curved, hydrodynamic shape. Vorrichtung (1) nach Anspruch 1, dadurch gekennzeichnet, dass die elastischen Platten (2) eine Dicke von etwa 2 cm aufweisen.Device (1) according to claim 1, characterized in that the elastic plates (2) have a thickness of about 2 cm. Vorrichtung (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die elastischen Platten (2) eine oder mehrere Einlagen (14), insbesondere aus textilem Gewebe, oder eine Armierung aus Stahlstäben, Stahldrähten oder Stahlseilen aufweisen.Device (1) according to claim 1 or 2, characterized in that the elastic plates (2) have one or more inserts (14), in particular of textile fabric, or a reinforcement of steel rods, steel wires or steel cables. Vorrichtung (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass für die elastischen Platten (2) Versteifungselemente vorgesehen sind, um die Flexibilität oder Steifigkeit der Platten je nach Bedarf anzupassen.Device (1) according to one of the preceding claims, characterized in that stiffening elements are provided for the elastic plates (2) in order to adapt the flexibility or rigidity of the plates as required. Vorrichtung (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Offshore-Bauwerk ein Monopile (301) ist.Device (1) according to one of the preceding claims, characterized in that the offshore structure is a monopile (301). Verfahren für den Kolkschutz von Offshore-Bauwerken, dadurch gekennzeichnet, dass eine Vorrichtung (1) nach einem der vorhergehenden Ansprüche an den zu schützenden Stellen fixiert wird.Method for the scour protection of offshore structures, characterized in that a device (1) according to one of the preceding claims is fixed to the points to be protected.
EP11175151A 2008-04-22 2009-04-20 Method and device for scour protection on offshore structures Withdrawn EP2386691A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE102008020261A DE102008020261A1 (en) 2008-04-22 2008-04-22 Flood water and coastal protection device, has fastening unit fixing set of elastic plates in position to be protected, where plates with thickness of specified range consist of rubber and inserts that are made up of textile fabrics
DE102008024151A DE102008024151A1 (en) 2008-04-22 2008-05-19 Device for flood and coastal protection
DE102008037712A DE102008037712A1 (en) 2008-04-22 2008-08-14 Device for flood and coastal protection
DE102008053688A DE102008053688A1 (en) 2008-04-22 2008-10-29 Device for flood and coastal protection
EP09734425A EP2286035A2 (en) 2008-04-22 2009-04-20 Device and method for flood protection, coastal protection and scour protection

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EP09734425.3 Division 2009-04-20

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EP2386691A1 true EP2386691A1 (en) 2011-11-16

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EP09734425A Ceased EP2286035A2 (en) 2008-04-22 2009-04-20 Device and method for flood protection, coastal protection and scour protection
EP11175151A Withdrawn EP2386691A1 (en) 2008-04-22 2009-04-20 Method and device for scour protection on offshore structures

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EP09734425A Ceased EP2286035A2 (en) 2008-04-22 2009-04-20 Device and method for flood protection, coastal protection and scour protection

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US (1) US20110033237A1 (en)
EP (2) EP2286035A2 (en)
JP (1) JP2011518268A (en)
AU (1) AU2009240383A1 (en)
BR (1) BRPI0910452A2 (en)
DE (4) DE102008020261A1 (en)
WO (1) WO2009129809A2 (en)

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DE102008020261A1 (en) 2009-10-29
AU2009240383A1 (en) 2009-10-29
EP2286035A2 (en) 2011-02-23
JP2011518268A (en) 2011-06-23
WO2009129809A2 (en) 2009-10-29
DE102008024151A1 (en) 2009-12-31
US20110033237A1 (en) 2011-02-10
BRPI0910452A2 (en) 2018-03-20
DE102008037712A1 (en) 2010-02-18
DE102008053688A1 (en) 2010-05-06
WO2009129809A3 (en) 2010-04-22

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