Offshore wind power composite jacket foundation and construction method

Abstract

The application discloses a kind of offshore wind power composite guide pipe support foundation and construction method, it is related to offshore wind power technical field.The offshore wind power composite guide pipe support foundation of the present application includes first pile foundation, multiple support foundations, guide pipe support and installation part, multiple The support foundation is set corresponding to the first pile foundation and is set along the circumference with the first pile foundation interval, at least part of the support foundation is used to be buried in seabed, the support foundation includes second pile foundation and / or cylinder foundation, the guide pipe support includes multiple support legs, multiple The support leg is respectively connected with the first pile foundation and multiple support foundation one-to-one, the installation part is set in the top of the guide pipe support, and the installation part is used to install wind turbine generator set.The offshore wind power composite guide pipe support foundation of the embodiment of the present application is set using original pile foundation to composite guide pipe support foundation, speeds up the construction of composite guide pipe support foundation, improves the construction efficiency of wind power station and reduces construction cost.

Description

Technical Field

[0001] This invention relates to the field of offshore wind power technology, specifically to an offshore wind power composite jacket foundation and construction method. Background Technology

[0002] Compared to traditional fossil fuels, wind energy is cleaner, less expensive, and has advantages such as wide development scope, safety, and inexhaustible energy. Offshore wind power has seen rapid development and application due to its advantages over onshore wind power, including higher wind speeds, lower turbulence, and no need to occupy arable land.

[0003] In the construction of offshore wind power, monopile foundations are generally used to support wind turbines. However, wind power stations have a limited service life. When they reach the end of their service life, the pile foundations may not be able to meet the load requirements, necessitating the demolition of the wind power station and its reconstruction at a new location.

[0004] In the process of demolishing and rebuilding wind power plants, the demolition and re-laying of monopile foundations takes a long time. The demolition of monopile foundations will affect the structure of the seabed, making it unsuitable for the original wind power plant to lay monopile foundations. The reconstruction of wind power plants is inefficient and has a high overall construction cost. At the same time, the demolition of monopile foundations will also cause irreversible damage to marine life and the seabed environment. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the technical problems in the related art.

[0006] To address this, this invention proposes a composite jacket foundation for offshore wind power, which utilizes existing pile foundations to construct the composite jacket foundation, thereby accelerating the construction of the composite jacket foundation, improving the construction efficiency of the wind power station, and reducing construction costs.

[0007] This invention also proposes a construction method for offshore wind power composite jacket foundation.

[0008] The offshore wind power composite jacket foundation of this invention includes:

[0009] First pile foundation;

[0010] Multiple supporting foundations are provided, which are corresponding to the first pile foundation and are spaced apart from the first pile foundation in the circumferential direction. At least a portion of the supporting foundations are used to be buried in the seabed. The supporting foundations include second pile foundations and / or tube foundations.

[0011] The conduit support includes multiple support legs, which are respectively connected to the first pile foundation and the multiple support foundations in a one-to-one correspondence.

[0012] The mounting section is located at the top of the duct support and is used to install the wind turbine.

[0013] The offshore wind power composite jacket foundation of this invention utilizes the existing pile foundation for the construction of the composite jacket foundation, which accelerates the construction of the composite jacket foundation, improves the construction efficiency of the wind power station, and reduces the construction cost.

[0014] In some embodiments, a first connecting portion is provided between the first pile foundation and the supporting leg, the first connecting portion being used to fix the first pile foundation and the guide support together.

[0015] In some embodiments, a second connecting portion is provided between the second pile foundation and the supporting leg, the second connecting portion being used to fix the second pile foundation and the guide support together.

[0016] In some embodiments, the first connecting part and the second connecting part have the same structure, and the connection method between the first connecting part and the first pile foundation and the connection method between the second connecting part and the second pile foundation are the same.

[0017] In some embodiments, the first connecting portion is sleeved on the top of the first pile foundation to form a first pouring cavity for pouring concrete between the first pile foundation and the second connecting portion is sleeved on the top of the second pile foundation to form a second pouring cavity for pouring concrete between the second pile foundation and the second pile foundation.

[0018] In some embodiments, a third connecting portion is provided between the cylindrical foundation and the supporting leg, the third connecting portion being used to fix the cylindrical foundation and the supporting leg together.

[0019] The construction method for offshore wind power composite jacket foundation in this invention includes the offshore wind power composite jacket foundation of any of the above embodiments;

[0020] The construction method includes the following steps:

[0021] S1. Select the first pile foundation;

[0022] S2. Install multiple support foundations, with the multiple support foundations spaced circumferentially from the first pile foundation;

[0023] S3. Connect the guide pipe support to the first pile foundation and multiple supporting foundations, and install and fix the guide pipe support.

[0024] S4. Install the mounting part on the top of the guide tube support to prepare for the installation of the wind turbine.

[0025] In some embodiments, the wind turbines on the original wind power station's pile foundation are dismantled one by one, and the pile foundation is tested for strength and passes the test, and then used as the first pile foundation in the composite jacket foundation.

[0026] In some embodiments, the second pile foundation is installed by static pressure or dynamic pile driving, and the second pile foundation is connected to the corresponding support leg by grouting.

[0027] In some embodiments, the cylindrical foundation is fixedly connected to the guide pipe support. The guide pipe support is initially fixed while the cylindrical foundation is being installed. After the cylindrical foundation is installed, the first pile foundation is connected to the corresponding support leg by grouting. Attached Figure Description

[0028] Figure 1 This is a top view of the offshore wind power composite jacket foundation according to an embodiment of the present invention.

[0029] Figure 2 This is a front view of the offshore wind power composite jacket foundation according to an embodiment of the present invention.

[0030] Figure 3 This is a construction flowchart of the offshore wind power composite jacket foundation construction method according to an embodiment of the present invention.

[0031] Figure label:

[0032] First pile foundation 1;

[0033] Second pile foundation 2;

[0034] Cylinder foundation 3;

[0035] 4. Conduit support; 41. Support leg; 42. Support plate; 43. Support rod; 44. Connecting rod;

[0036] Installation section 5;

[0037] First connecting part 6;

[0038] Second connecting part 7;

[0039] Third connecting part 8. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0041] like Figure 1 and Figure 2As shown, the offshore wind power composite jacket foundation of this embodiment includes a first pile foundation 1, multiple support foundations, a jacket support 4, and an installation part 5. The multiple support foundations are arranged corresponding to the first pile foundation 1 and are spaced apart from the first pile foundation 1 in the circumferential direction. At least some of the support foundations are used to be buried in the seabed. The support foundations include a second pile foundation 2 and / or a cylindrical foundation 3. The jacket support 4 includes multiple support legs 41, which are respectively connected to the first pile foundation 1 and the multiple support foundations one by one. The installation part 5 is located on the top of the jacket support 4 and is used to install the wind turbine.

[0042] In the construction of the offshore wind power composite jacket foundation of this invention, multiple supporting foundations are installed with the first pile foundation 1 as a reference point. The load is shared by the multiple supporting foundations and the first pile foundation 1, reducing the load borne by the first pile foundation 1. The supporting foundations include the second pile foundation 2 and / or the tube foundation 3. The seabed structure can be detected before the composite jacket foundation is installed, and the supporting foundations can be optimized according to different geological conditions of the seabed. The second pile foundation 2, the tube foundation 3, or both the second pile foundation 2 and the tube foundation 3 can be reasonably used as the supporting foundations, adapting to local conditions and reducing construction costs while ensuring effective load bearing.

[0043] The offshore wind power composite jacket foundation of this invention utilizes the existing pile foundation for the construction of the composite jacket foundation, realizing the reuse of retired wind turbine components, accelerating the construction of the composite jacket foundation, improving the construction efficiency of the wind power station and reducing construction costs, while avoiding secondary damage to the marine environment caused by the demolition of the pile foundation.

[0044] It should be noted that the supporting foundation including the second pile foundation 2 and / or the tube foundation 3 means that the supporting foundation includes the second pile foundation 2, or the supporting foundation includes the tube foundation 3, or the supporting foundation includes both the second pile foundation 2 and the tube foundation 3. Among them, the pile foundation is suitable for geological structures in the form of sand, and the tube foundation 3 is suitable for geological structures in the form of silty clay.

[0045] Optionally, the first pile foundation 1 can be the existing pile foundation of the wind power station, which can realize the reuse of the existing pile foundation.

[0046] Optionally, the diameter of the second pile foundation 2 is 2m-5m, and the height is 20m-50m.

[0047] Optionally, the diameter of the cylindrical foundation 3 is 15m-30m, and the height is 5m-12m.

[0048] Optionally, the cylindrical foundation 3 is a cylindrical structure with a capped top and an opening at the bottom.

[0049] Optionally, mounting section 5 is a tower.

[0050] In some embodiments, such as Figure 1 and Figure 2 As shown, a first connecting part 6 is provided between the first pile foundation 1 and the support leg 41. The first connecting part 6 is used to fix the first pile foundation 1 and the guide support 4 together.

[0051] The first connecting part 6 is provided to facilitate the connection between the first pile foundation 1 and the support leg 41, so that the support leg 41 can stably transmit the load to the first pile foundation 1 and ensure the stability of the composite jacket foundation.

[0052] In some embodiments, such as Figure 1 and Figure 2 As shown, a second connecting part 7 is provided between the second pile foundation 2 and the support leg 41. The second connecting part 7 is used to fix the second pile foundation 2 and the guide support 4 together.

[0053] The second connecting part 7 is provided to facilitate the connection between the second pile foundation 2 and the support leg 41, so that the support leg 41 can stably transfer the load to the second pile foundation 2 and ensure the stability of the composite jacket foundation.

[0054] In some embodiments, such as Figure 1 and Figure 2 As shown, the first connecting part 6 and the second connecting part 7 have the same structure, and the connection method between the first connecting part 6 and the first pile foundation 1 and the connection method between the second connecting part 7 and the second pile foundation 2 are the same.

[0055] The first connecting part 6 and the second connecting part 7 are designed to have the same structure, which facilitates the processing of the first connecting part 6 and the second connecting part 7. The connection method between the first connecting part 6 and the first pile foundation 1 and the connection method between the second connecting part 7 and the second pile foundation 2 are the same, which can facilitate the connection of the first connecting part 6 and the second connecting part 7 to the corresponding support leg 41, thereby improving construction efficiency.

[0056] In some embodiments, such as Figure 1 As shown, the first connecting part 6 is sleeved on the top of the first pile foundation 1 to form a first pouring cavity for pouring concrete between the first pile foundation 1 and the second connecting part 7 is sleeved on the top of the second pile foundation 2 to form a second pouring cavity for pouring concrete between the second pile foundation 2 and the second pile foundation 2.

[0057] A first pouring cavity for pouring concrete is formed between the first connecting part 6 and the first pile foundation 1, and a second pouring cavity for pouring concrete is formed between the second connecting part 7 and the second pile foundation 2. The connection between the first connecting part 6 and the first pile foundation 1 and the connection between the second connecting part 7 and the second pile foundation 2 are achieved by pouring concrete into the first pouring cavity and the second pouring cavity. The construction is convenient and the connection is reliable.

[0058] Optionally, connecting bars are provided on the side walls of the first pile foundation 1 and the second pile foundation 2, respectively, corresponding to the first connecting part 6 and the second connecting part 7, and the connecting bars are used to strengthen the connection.

[0059] Optionally, the first connecting part 6 is a cylindrical structure.

[0060] Optionally, the second connecting part 7 is a cylindrical structure.

[0061] In some embodiments, such as Figure 1 and Figure 2 As shown, a third connecting part 8 is provided between the cylindrical foundation 3 and the supporting leg 41. The third connecting part 8 is used to fix the cylindrical foundation 3 and the supporting leg 41 together.

[0062] By providing a third connecting part 8, it is easy to connect the cylinder foundation 3 and the support leg 41 together, so that the guide tube support 4 can be initially installed while the cylinder foundation 3 is being installed.

[0063] Optionally, the third connecting part 8 is a plate-shaped structure, which increases the connection area between the cylindrical foundation 3 and the support leg 41 and reduces the pressure borne at the connection position.

[0064] In some embodiments, such as Figure 1 As shown, the multiple supporting foundations include a second pile foundation 2 and a tube foundation 3. There are two tube foundations 3, which are respectively located on both sides of the first pile foundation 1 in a diagonal arrangement. The first pile foundation 1 and the second pile foundation 2 are diagonally arranged.

[0065] Two tube foundations 3 are provided and are arranged diagonally. When installing tube foundations 3, the initial fixation and balance of the guide tube support 4 can be ensured, which facilitates installation.

[0066] In some embodiments, such as Figure 2 As shown, the guide support 4 includes a support plate 42, support rods 43 and connecting rods 44. The support plate 42 is horizontally arranged. Multiple support rods 43 are provided and are inclinedly arranged below the support plate 42. One end of the support rod 43 is connected to the support plate 42, and the other end of the support rod 43 forms a support leg 41 to connect with the first pile foundation 1 and multiple support foundations. Multiple connecting rods 44 are arranged in a cross pattern. Multiple connecting rods 44 are used to connect two adjacent support rods 43.

[0067] The installation of the mounting part 5 at the top of the catheter support 4 is ensured by setting the support plate 42, and the support rod 43 and connecting rod 44 are set at the bottom of the catheter support 4. While ensuring the load-bearing capacity of the catheter support 4, the weight of the catheter support 4 itself is reduced, which facilitates cost reduction.

[0068] The offshore wind power composite jacket foundation of the present invention has the following advantages:

[0069] 1. New foundations can be installed directly on existing monopile foundation sites, avoiding the demolition of underground structures and minimizing the need for new sites;

[0070] 2. The existing single pile foundation can be used as part of the new structure to bear part of the load, thus saving the amount of steel used in the new foundation;

[0071] 3. By selecting and combining pile foundations and tube foundations 3, the optimal method can be chosen based on the geological conditions of each location, thereby reducing construction costs while meeting the load-bearing requirements.

[0072] The following describes the construction method of the offshore wind power composite jacket foundation according to an embodiment of the present invention.

[0073] like Figure 3 As shown in a, b, c, and d, the offshore wind power composite jacket foundation construction method of this invention includes the offshore wind power composite jacket foundation of any of the above embodiments.

[0074] The construction method includes the following steps:

[0075] S1. Select the first pile foundation 1;

[0076] S2. Install multiple support foundations, with the multiple support foundations spaced circumferentially from the first pile foundation 1;

[0077] S3. Connect the guide pipe support 4 to the first pile foundation 1 and multiple supporting foundations, and install and fix the guide pipe support 4.

[0078] S4. Install the mounting part 5 on the top of the guide tube support 4 to prepare for the installation of the wind turbine.

[0079] The offshore wind power composite jacket foundation construction method of this invention enables rapid construction of the composite jacket foundation by reusing the original pile foundation, thereby improving the construction efficiency of the wind power station and reducing the construction cost, while avoiding secondary damage to the marine environment caused by the demolition of the pile foundation.

[0080] In some embodiments, the wind turbines on the original wind power station's pile foundation are dismantled one by one, and the pile foundation is subjected to strength testing. After the test is passed, it is used as the first pile foundation 1 in the composite jacket foundation.

[0081] By demolishing the existing wind power station and verifying the existing pile foundation, the selected first pile foundation 1 is guaranteed to meet the construction requirements, thereby avoiding the demolition and re-laying of the pile foundation, improving construction efficiency, and reducing construction costs.

[0082] In some embodiments, the second pile foundation 2 is installed by static pressure or dynamic pile driving, and the second pile foundation 2 is connected to the corresponding support leg 41 by grouting.

[0083] It is easy to operate and install, and can quickly embed the second pile foundation 2. Grouting is used to connect the second pile foundation 2 with the corresponding support leg 41, ensuring the connection strength and stability during use.

[0084] It should be noted that static pressure refers to driving piles with heavy objects. This method of pile foundation installation is an existing technology, and its specific principles will not be elaborated here.

[0085] In some embodiments, the cylindrical foundation 3 is fixedly connected to the guide pipe support 4. In S2, the cylindrical foundation 3 is installed first, and then the second pile foundation 2 is installed.

[0086] The cylindrical foundation 3 is fixedly connected to the guide pipe support 4. The guide pipe support 4 can be hoisted to lift the cylindrical foundation 3. When installing the cylindrical foundation 3, once the cylindrical foundation 3 is in place, the guide pipe support 4 can be supported and fixed. At this time, the position of the second pile foundation 2 can be determined according to the position of the support leg 41 of the guide pipe support 4, which facilitates the installation and positioning of the second pile foundation 2 and makes the installation of the second pile foundation 2 more convenient and faster.

[0087] In some embodiments, the cylindrical foundation 3 is fixedly connected to the guide pipe support 4. The guide pipe support 4 is initially fixed while the cylindrical foundation 3 is being installed. After the cylindrical foundation 3 is installed, the first pile foundation 1 is connected to the corresponding support leg 41 by grouting.

[0088] The cylindrical foundation 3 is fixedly connected to the guide pipe support 4. The cylindrical foundation 3 can be lifted by hoisting the guide pipe support 4. When installing the cylindrical foundation 3, once the cylindrical foundation 3 is in place, the guide pipe support 4 can be supported and fixed. The connection between the guide pipe support 4 and the first pile foundation 1 ensures the overall support of the guide pipe support 4.

[0089] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0090] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0091] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0092] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0093] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0094] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An offshore wind power composite jacket foundation, characterized by, include: The first pile foundation is the existing pile foundation of the wind turbine. Multiple support foundations are provided, which are provided corresponding to the first pile foundation and are spaced apart from the first pile foundation in the circumferential direction. At least a portion of the support foundations are used to be buried in the seabed. The support foundations include a second pile foundation and a tube foundation. There are two tube foundations. The tube foundations are respectively provided on both sides of the first pile foundation in a diagonal arrangement. The first pile foundation and the second pile foundation are diagonally arranged. The conduit support includes multiple support legs, which are respectively connected to the first pile foundation and the multiple support foundations in a one-to-one correspondence. The mounting section is located at the top of the duct support and is used to install the wind turbine.

2. An offshore wind farm composite jacket foundation according to claim 1, characterized in that, A first connecting part is provided between the first pile foundation and the supporting leg, and the first connecting part is used to fix the first pile foundation and the guide support together.

3. The offshore wind power composite jacket foundation according to claim 2, characterized in that, A second connecting part is provided between the second pile foundation and the supporting leg, and the second connecting part is used to fix the second pile foundation and the guide support together.

4. The offshore wind power composite jacket foundation according to claim 3, characterized in that, The first connecting part and the second connecting part have the same structure, and the connection method between the first connecting part and the first pile foundation is the same as the connection method between the second connecting part and the second pile foundation.

5. The offshore wind power composite jacket foundation according to claim 4, characterized in that, The first connecting part is sleeved on the top of the first pile foundation to form a first pouring cavity for pouring concrete between the first pile foundation and the second connecting part is sleeved on the top of the second pile foundation to form a second pouring cavity for pouring concrete between the second pile foundation and the second pile foundation.

6. The offshore wind power composite jacket foundation according to claim 1, characterized in that, A third connecting part is provided between the cylindrical foundation and the supporting leg, and the third connecting part is used to fix the cylindrical foundation and the supporting leg together.

7. A construction method for a composite jacket foundation for offshore wind power, characterized in that, Includes the offshore wind power composite jacket foundation as described in any one of claims 1-6; The construction method includes the following steps: S1. Select the first pile foundation; S2. Install multiple support foundations, with the multiple support foundations spaced circumferentially from the first pile foundation; S3. Connect the guide pipe support to the first pile foundation and multiple supporting foundations, and install and fix the guide pipe support. S4. Install the mounting part on the top of the guide tube support to prepare for the installation of the wind turbine.

8. The construction method for offshore wind power composite jacket foundation according to claim 7, characterized in that, The wind turbines on the original wind power station's pile foundation were dismantled one by one. After the pile foundation was tested for strength and passed the test, it was used as the first pile foundation in the composite jacket foundation.

9. The construction method for offshore wind power composite jacket foundation according to claim 7, characterized in that, The second pile foundation is installed by static pressure or dynamic pile driving, and the second pile foundation is connected to the corresponding support leg by grouting.

10. The construction method for offshore wind power composite jacket foundation according to claim 7, characterized in that, The cylindrical foundation is fixedly connected to the guide pipe support. The guide pipe support is initially fixed while the cylindrical foundation is being installed. After the cylindrical foundation is installed, the first pile foundation and the corresponding support leg are connected by grouting.

Images