Gravity type suction bucket composite anchoring foundation

Abstract

A gravity type suction bucket composite anchoring foundation comprises a suction bucket foundation composed of a suction bucket body and a suction bucket top plate, a top plate reinforcing plate is arranged on the suction bucket top plate, a concrete layer is arranged on the suction bucket top plate and the top plate reinforcing plate, tension legs are arranged on the concrete layer, and a reserved suction pump pipeline is arranged in the concrete layer. An anti-scouring structure is arranged on the periphery of the suction bucket top plate. The suction bucket anchoring foundation has the advantages that through the gravity type concrete layer, the uplift bearing capacity of the suction bucket anchoring foundation can be increased, and the size of the suction bucket anchoring foundation and the construction difficulty of the whole structure are reduced; the gravity type concrete layer, the suction bucket top plate and the top plate reinforcing plate are of an integral combined structure, the rigidity of the suction bucket top plate can be enhanced, meanwhile, the engineering amount of the suction bucket top plate and the top plate reinforcing plate is reduced, and the problems of local buckling of steel plates and the like are solved. An anti-scouring structure of the suction bucket is added, so that the overall foundation is prevented from being scoured, and the bearing capacity of the whole bucket body is increased.

Description

Technical Field

[0001] The utility model relates to a gravity suction bucket composite anchoring foundation, which is mainly used for an offshore tension leg floating structure and belongs to the technical field of offshore floating structure anchoring. Background Art

[0002] With the development of offshore wind power, further expansion into the deep sea is inevitable, leading to increasing research on floating wind turbine foundations. Furthermore, with the development and utilization of offshore resources, attention has turned to floating photovoltaics. Currently, both floating wind turbine and floating photovoltaic foundations require an anchor foundation. Current anchor foundations primarily include suction anchors, pile anchors, and gravity anchors. Each anchor foundation primarily supports the uplift forces required by the upper floating structure. Tension-type floating foundations, in particular, require greater uplift forces, placing higher demands on the anchor foundation and requiring larger structural dimensions to meet these requirements. Furthermore, the presence of the anchor foundation can cause scouring around the foundation. Summary of the Invention

[0003] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a gravity suction bucket composite anchoring foundation for an offshore tension leg type floating structure.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A gravity-type suction bucket composite anchor foundation is characterized in that it includes a suction bucket foundation composed of a suction bucket body and a suction bucket top plate, a top plate reinforcement plate is arranged on the suction bucket top plate, a concrete layer is arranged on the suction bucket top plate and the top plate reinforcement plate, a tension leg is arranged on the concrete layer, a reserved suction pump pipeline is arranged in the concrete layer, and an anti-scour structure is arranged around the suction bucket top plate.

[0006] Furthermore, the anti-scour structure includes an anti-scour transition plate arranged around the top plate of the suction barrel, and reinforcing ribs arranged under the anti-scour transition plate, and the reinforcing ribs are connected to the barrel body of the suction barrel.

[0007] Furthermore, the anti-scour transition plate is provided with evenly distributed reserved holes.

[0008] Furthermore, the anti-scour transition plate is formed by extending 2-6 cm outward from the periphery of the suction barrel top plate.

[0009] Furthermore, a tension leg fixer is provided in the concrete layer, and the tension leg is fixed on the tension leg fixer.

[0010] Furthermore, the top plate reinforcement plates are evenly distributed on the top plate of the suction barrel in an umbrella shape.

[0011] Furthermore, evenly distributed compartment plates are provided under the top plate reinforcement plate, and the compartment plates separate the suction barrel body into various compartments.

[0012] Furthermore, the suction barrel body, the suction barrel top plate and the top plate reinforcement plate are welded into a whole.

[0013] Furthermore, the concrete layer, suction bucket top plate and top plate reinforcement plate are cast as a whole.

[0014] The beneficial effects of the utility model are:

[0015] 1. The gravity concrete layer can increase the pull-out bearing capacity of the suction bucket anchor foundation, reduce the size of the suction bucket anchor foundation and the construction difficulty of the overall structure;

[0016] 2. The gravity concrete layer, suction bucket top plate and top plate reinforcement plate are an integral composite structure. This can strengthen the rigidity of the suction bucket top plate while reducing the engineering workload of the suction bucket top plate and top plate reinforcement plate, and avoid problems such as local buckling of the steel plate;

[0017] 3. Add an anti-scouring structure to the suction barrel to avoid overall scouring of the foundation and increase the bearing capacity of the entire barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a gravity suction bucket composite anchoring foundation structure of the utility model;

[0019] Figure 2 This is a top view schematic diagram of a gravity suction bucket composite anchor foundation of the utility model;

[0020] Figure 3 The utility model is a schematic diagram of a sub-compartment structure of a gravity suction bucket composite anchoring foundation. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with specific embodiments.

[0022] As attached Figure 1 —3 shows a gravity-type suction bucket composite anchor foundation, comprising a suction bucket foundation 01 consisting of a suction bucket body 1 and a suction bucket top plate 2, a top plate reinforcement plate 3 being provided on the suction bucket top plate 2, a concrete layer 4 being provided on the suction bucket top plate 2 and the top plate reinforcement plate 3, a tension leg 5 being provided on the concrete layer 4, a reserved suction pump pipeline 6 being provided in the concrete layer 4, and an anti-scouring structure being provided around the suction bucket top plate 2.

[0023] The suction bucket foundation 01 in this solution consists of a suction bucket body 1 and a suction bucket top plate 2. To reduce engineering effort and construction costs, the suction bucket top plate 2 is reinforced with a top plate reinforcement plate 3. To further increase the rigidity of the suction bucket top plate 2, a frusto-conical gravity concrete layer 4 is cast atop the top of the bucket. The concrete layer 4, along with the suction bucket top plate 2 and top plate reinforcement plate 3, is cast onshore as a single unit and transported to the site. The suction bucket foundation 01 is then sunk to the designed location via a pre-reserved suction pump line 6. In practice, for floating wind turbine foundations, the diameter of the suction bucket body 1 is typically 20-40 meters, and the concrete layer 4 weighs 1000-2000 tons. For floating photovoltaic foundations, the diameter of the suction bucket body 1 is typically 5-10 meters, and the concrete layer 4 weighs 200-500 tons. Moreover, due to the presence of the concrete layer 4, the anchor foundation is likely to protrude from the seabed surface, and even cause changes in the flow field around the anchor foundation, forming a scour pit. Therefore, an anti-scour structure is set around the suction bucket top plate 2 to avoid scouring of the seabed around the anchor foundation. This solution can increase the pull-out bearing capacity of the suction bucket anchor foundation through the gravity concrete layer, reduce the size of the suction bucket anchor foundation and the construction difficulty of the overall structure; and the gravity concrete layer and the suction bucket top plate and top plate reinforcement plate are an integral combined structure, which can reduce the engineering workload of the suction bucket top plate and top plate reinforcement plate while strengthening the rigidity of the suction bucket top plate, and avoid problems such as local buckling of the steel plate; at the same time, the suction bucket anti-scour structure is added to avoid overall scouring of the foundation and increase the bearing capacity of the entire barrel body.

[0024] Furthermore, the anti-scour structure includes an anti-scour transition plate 7 arranged around the top plate 2 of the suction barrel, and reinforcing ribs 8 arranged under the anti-scour transition plate 7. The reinforcing ribs 8 are connected to the suction barrel body 1. The anti-scour transition plate is connected to the outer wall of the suction barrel body through the reinforcing ribs, thereby increasing the frictional resistance of the entire body and increasing the overall bearing capacity of the structure.

[0025] Furthermore, the anti-scour transition plate 7 is provided with evenly distributed reserved holes 9, which can be used for drainage and soil squeezing to prevent excessive water resistance or uneven mud surface during the sinking of the anchor foundation, causing sinking difficulties.

[0026] Furthermore, the anti-scour transition plate 7 is formed by extending 2-6 cm outward from the periphery of the suction barrel top plate 2. During processing, the position of the anti-scour transition plate is preset to facilitate processing.

[0027] Furthermore, a tension leg fixture 10 is installed in the concrete layer 4, and the tension leg 5 is fixed to the tension leg fixture 10. The tension leg fixture is a conventional, commercially available fixture that provides a secure fixation. During operation of the floating anchor foundation, the tension leg 5 is subjected to tension, first overcoming the weight of the upper concrete layer 4, and then providing tension through the suction bucket foundation 01.

[0028] Furthermore, the top plate reinforcement plates 3 are evenly distributed on the top plate 2 of the suction barrel in an umbrella shape, and the umbrella-shaped even distribution has better strength.

[0029] Furthermore, evenly distributed compartment plates 11 are provided under the top plate reinforcement plate 3, and the compartment plates divide the suction barrel body 1 into various compartments, thereby enhancing the compressive strength of the suction barrel body.

[0030] Furthermore, the suction barrel body 1, the suction barrel top plate 2 and the top plate reinforcement plate 3 are welded into a whole to improve the overall strength.

[0031] Furthermore, the concrete layer 4, suction bucket top plate 2 and top plate reinforcement plate 3 are cast as a whole. On the one hand, the rigidity of the suction bucket top plate 2 can be strengthened to avoid problems such as local buckling of the suction bucket top plate 2. On the other hand, the concrete layer is heavy, which can increase the pull-out bearing capacity of the entire anchor foundation.

[0032] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A gravity suction bucket composite anchor foundation, characterized by: The invention comprises a suction bucket foundation (01) consisting of a suction bucket body (1) and a suction bucket top plate (2), a top plate reinforcement plate (3) is arranged on the suction bucket top plate (2), a concrete layer (4) is arranged on the suction bucket top plate (2) and the top plate reinforcement plate (3), a tension leg (5) is arranged on the concrete layer (4), a suction pump pipeline (6) is reserved in the concrete layer (4), an anti-scour structure is arranged around the suction bucket top plate (2), the anti-scour structure comprises an anti-scour transition plate (7) arranged around the suction bucket top plate (2), a reinforcing rib (8) is arranged under the anti-scour transition plate (7), and the reinforcing rib (8) is connected to the suction bucket body (1).

2. A gravity suction bucket composite anchor foundation as claimed in claim 1, characterized in that The anti-scour transition plate (7) is provided with evenly distributed reserved holes (9).

3. A gravity suction bucket composite anchor foundation as claimed in claim 1, characterized in that The anti-scour transition plate (7) is formed by extending 2-6 cm outward from the periphery of the suction barrel top plate (2).

4. A gravity suction bucket composite anchor foundation as claimed in claim 1, characterized in that A tension leg fixer (10) is provided in the concrete layer (4), and the tension leg (5) is fixed on the tension leg fixer (10).

5. The gravity suction bucket composite anchor foundation according to claim 1, characterized in that The top plate reinforcement plates (3) are evenly distributed on the top plate (2) of the suction barrel in an umbrella shape.

6. The gravity suction bucket composite anchor foundation according to claim 1, characterized in that Uniformly distributed compartment plates (11) are provided under the top plate reinforcement plate (3), and the compartment plates divide the suction barrel body (1) into various compartments.

7. The gravity suction bucket composite anchor foundation according to claim 1, characterized in that The suction barrel body (1), the suction barrel top plate (2) and the top plate reinforcement plate (3) are welded into a whole.

8. The gravity suction bucket composite anchor foundation according to claim 1, characterized in that The concrete layer (4), the suction bucket top plate (2) and the top plate reinforcement plate (3) are cast as a whole.

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