Pile foundation structure of offshore photovoltaic superstructure

Abstract

The utility model provides a pile foundation structure of an offshore photovoltaic superstructure, and relates to the technical field of offshore photovoltaic. The structure comprises a main body part which is of a hollow round-rod-shaped structure and extends in the direction perpendicular to the sea level; the main body part comprises a first sub-main body and a second sub-main body which are connected with each other, the outer diameter of the first sub-main body is smaller than that of the second sub-main body, the end, away from the first sub-main body, of the second sub-main body is fixed to the seabed, and at least part of the first sub-main body is located above the sea level; the end, away from the second sub-body, of the first sub-body is connected with the upper supporting structure. At least one reinforcing rib plate is arranged on the inner side wall of the second sub-main body, extends in the direction parallel to the axis of the main body part and is perpendicular to the inner side wall of the second sub-main body. According to the pile foundation structure, reliable supporting force can be provided, the installation stability and safety of an offshore photovoltaic device are guaranteed, and then the service life of the whole offshore photovoltaic device is prolonged.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of offshore photovoltaic technology, in particular, to a pile foundation structure of an offshore photovoltaic superstructure. BACKGROUND

[0002] Offshore photovoltaic is a comprehensive device for converting solar energy into electric energy. Since it is laid in the marine environment, it can reasonably and fully utilize offshore resources, become a new field of current new energy development, and has good development prospects.

[0003] At present, offshore photovoltaic generally includes a support unit and a photovoltaic assembly structure, the support unit includes a pile foundation structure fixed in the sea and an upper support structure connected with the pile foundation structure, and the photovoltaic assembly is laid on the upper support structure. The pile foundation structure provides a construction foundation for the subsequent fixation of the photovoltaic assembly. The fixation capacity and support stability of the pile foundation play a decisive role in the installation and service life of the entire offshore photovoltaic. However, the stability and reliability of the existing pile foundation structure cannot meet the use requirements of offshore photovoltaic, and the phenomenon of deformation or unstable support is prone to occur, which affects the overall service life of the system.

[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. CONTENT OF THE INVENTION

[0005] Therefore, a fixed pile foundation structure of offshore photovoltaic is provided, which can provide stable support for the photovoltaic assembly, improve the installation reliability and safety of offshore photovoltaic, and further improve the overall service life.

[0006] Other characteristics and advantages of the present disclosure will become apparent from the following detailed description, or will be learned by practice of the present disclosure.

[0007] According to one aspect of the present disclosure, a pile foundation structure of an offshore photovoltaic superstructure is provided, the offshore photovoltaic superstructure includes an upper support structure and a photovoltaic assembly, the photovoltaic assembly is laid on the upper support structure, and the pile foundation structure is used to support the upper support structure, and the pile foundation structure includes:

[0008] a main body portion, the main body portion is a hollow circular rod structure, and the main body portion extends in a direction perpendicular to the sea level;

[0009] The main body includes a first sub-body and a second sub-body that are connected to each other. The outer diameter of the first sub-body is smaller than that of the second sub-body. The end of the second sub-body away from the first sub-body is fixed to the seabed. At least a portion of the first sub-body is located above the sea level. The end of the first sub-body away from the second sub-body is connected to the upper support structure.

[0010] At least one reinforcing rib is provided on the inner sidewall of the second sub-body. The reinforcing rib extends along the axis parallel to the main body and is perpendicular to the inner sidewall of the second sub-body.

[0011] In an exemplary embodiment of this disclosure, there are multiple reinforcing ribs, which are evenly distributed along the circumferential direction of the inner sidewall of the second sub-body. One side of each reinforcing rib is connected to the inner sidewall of the second sub-body, and the ratio of the length of the projection of each reinforcing rib on the sea surface to the inner diameter of the second sub-body is less than one-half.

[0012] In one exemplary embodiment of this disclosure, there are multiple reinforcing ribs, which are arranged in a cross pattern, and the two sides of each reinforcing rib are respectively connected to the inner sidewall of the second sub-body.

[0013] In one exemplary embodiment of this disclosure, the ratio of the length of each of the reinforcing ribs to the length of the second sub-body is 1:1 to 1:3.

[0014] In one exemplary embodiment of this disclosure, the first sub-body is a variable diameter structure, and the outer diameter of the first sub-body gradually decreases along the direction from the seabed to the sea level;

[0015] The outer diameter of the first sub-body is 1000mm to 1200mm.

[0016] In one exemplary embodiment of this disclosure, the second sub-body is a variable diameter structure, and the outer diameter of the second sub-body gradually decreases along the direction from the seabed to the sea level;

[0017] The outer diameter of the second sub-body is 1200mm to 1400mm.

[0018] In one exemplary embodiment of this disclosure, the outer diameter of the first sub-body and the second sub-body at the location where they are connected is the same.

[0019] In one exemplary embodiment of this disclosure, the main body is an integrally formed structure, and the axis of the first sub-body coincides with the axis of the second sub-body.

[0020] In one exemplary embodiment of this disclosure, the wall thickness of the main body is 15mm to 25mm.

[0021] In an exemplary embodiment of this disclosure, two first lifting lugs are provided on the outer side wall of the first sub-body. The two first lifting lugs are symmetrically arranged on the outer side wall of the first sub-body, and each first lifting lug is perpendicular to the axis of the first sub-body.

[0022] A second lifting lug is symmetrically arranged on the outer side wall of the second sub-body. The second lifting lug is perpendicular to the axis of the second sub-body. The line connecting the second lifting lug and the second sub-body is on the same straight line as the line connecting the first lifting lug and the first sub-body.

[0023] The pile foundation structure for the offshore photovoltaic (PV) superstructure disclosed herein is connected to the superstructure support structure of the PV system. By incorporating reinforcing ribs within the second sub-body, the stability of the structure fixed on the seabed is improved, thus enhancing its support stability. This structure is a hollow cylindrical rod structure, characterized by its lightweight nature, facilitating transportation and installation at sea and saving economic costs. Furthermore, the structure employs a variable diameter design, which, while suitable for the superstructure support of offshore PV systems, enhances the stability of the seabed-fixed portion, making it less prone to deformation and suitable for offshore installation environments, thereby extending the service life of the pile foundation structure.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0026] Figure 1 This is a side view of a pile foundation structure for an offshore photovoltaic superstructure according to an exemplary embodiment of this disclosure.

[0027] Figure 2 This is a schematic diagram of the arrangement of reinforcing ribs in an exemplary embodiment of this disclosure.

[0028] Figure 3 This is a schematic diagram of another arrangement of reinforcing ribs in an exemplary embodiment of this disclosure.

[0029] Figure 4This is a schematic diagram of the structure of a first or second lifting lug in an exemplary embodiment of the present disclosure.

[0030] Figure 5 This is a schematic diagram of the connection structure between a first lifting lug and a first sub-body in an exemplary embodiment of this disclosure.

[0031] Figure 6 This is a schematic diagram of the connection structure between a second lifting lug and a second sub-body in an exemplary embodiment of this disclosure.

[0032] The reference numerals in the attached figures are explained as follows:

[0033] 10. Main body; 101. First sub-body; 102. Second sub-body; 103. Reinforcing rib; 104. First lifting lug; 105. Second lifting lug; 201. Lifting lug body; 202. Supporting part. Detailed Implementation

[0034] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0035] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0036] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0037] In related technologies, the superstructure of offshore photovoltaic (PV) systems typically includes support units and PV modules. The support unit comprises a connected pile foundation structure and a superstructure. The superstructure is used to install the PV panels, while the pile foundation supports the superstructure, enabling the support unit to support and secure the PV modules in the ocean. Due to the challenging construction environment of offshore PV systems, including sea winds and waves, the strength and safety stability requirements for the pile foundation structure differ from those for land-based pile foundations. Existing land-based pile foundation structures cannot meet the stability requirements of the marine environment and are easily affected by deformation or even damage, thus shortening the lifespan of offshore PV systems.

[0038] Based on this, the present disclosure provides a pile foundation structure for the superstructure of an offshore photovoltaic system, such as... Figure 1 As shown, combined with Figure 2 and Figure 3 The structure includes: main body 10.

[0039] The main body 10 is a hollow cylindrical structure that extends in a direction perpendicular to the sea level. The main body 10 includes a first sub-body 101 and a second sub-body 102 that are connected to each other. The outer diameter of the first sub-body 101 is smaller than that of the second sub-body 102. The end of the second sub-body 102 away from the first sub-body 101 is fixed to the seabed. At least a portion of the first sub-body 101 is located above the sea level. The end of the first sub-body 101 away from the second sub-body 102 is connected to the upper support structure. At least one reinforcing rib 103 is provided on the inner wall of the second sub-body 102. The reinforcing rib 103 extends in a direction parallel to the axis of the main body 10 and is perpendicular to the inner wall of the second sub-body 102.

[0040] The pile foundation structure for the offshore photovoltaic (PV) superstructure disclosed herein is connected to the superstructure support structure of the offshore PV system. Firstly, by providing reinforcing ribs 103 within the second sub-body 102, the stability of the structure fixed on the seabed is improved, thus enhancing the support stability of the structure. Secondly, the structure is a hollow cylindrical rod structure, characterized by its lightweight nature, facilitating transportation and installation at sea and saving economic costs. Thirdly, the structure adopts a variable diameter structure, which, while suitable for the superstructure support of offshore PV systems, improves the stability of the seabed-fixed portion, making the seabed portion less prone to deformation, suitable for the offshore installation environment, thereby extending the service life of the pile foundation structure.

[0041] The following will describe in detail, with reference to the accompanying drawings, the various parts of the pile foundation structure of the offshore photovoltaic superstructure provided in the embodiments of this disclosure:

[0042] In the embodiments provided in this disclosure, the structure includes a main body 10. The main body 10 is a hollow, cylindrical structure that extends in a direction perpendicular to the sea level.

[0043] like Figure 1 As shown, the main body 10 includes a first sub-body 101 and a second sub-body 102 that are connected to each other. The outer diameter of the first sub-body 101 is smaller than the outer diameter of the second sub-body 102.

[0044] In this structure, one end of the first sub-body 101 is connected to one end of the second sub-body 102, and the end of the first sub-body 101 away from the second sub-body 102 is connected to the upper support structure. The first sub-body 101 and the upper support structure can be connected by various connection methods such as welding, screwing, and riveting. The two can be a fixed connection or a detachable connection, which can be selected and adjusted according to the actual design requirements of the structure. This disclosure does not make any specific limitations.

[0045] At least a portion of the first sub-body 101 is located above sea level to ensure that the first sub-body 101 can provide support for the superstructure above sea level. The length of the portion of the first sub-body 101 above sea level can account for 20% to 100% of the overall length of the first sub-body 101, and the specific length of the first sub-body 101 above sea level can be adjusted according to actual needs.

[0046] The first sub-body 101 can be a variable diameter structure. In the direction from the seabed to the sea level, the outer diameter of the first sub-body 101 gradually decreases, and the inner diameter of the first sub-body 101 gradually decreases to ensure the uniformity of the sidewalls of the first sub-body 101. When the first sub-body 101 is subjected to external forces, the uniformity of the force on the sidewalls is ensured, and the force on the bottom end of the first sub-body 101 is greater than that on the top end, avoiding the deformation of the top end of the first sub-body 101 under stress, which would be detrimental to the connection between the main body 10 and the upper support structure.

[0047] The outer diameter of the first sub-body 101 can be 1000mm to 1200mm, for example, it can be 1000mm, 1050mm, 1100mm, 1150mm or 1200mm. The outer diameter of the first sub-body 101 is within the above range. Under the premise of ensuring the supporting strength of the first sub-body 101, the lightweight performance of the first sub-body 101 is improved, which facilitates the transportation and installation of the main body 10 and saves costs.

[0048] The wall thickness of the first sub-body 101 can be 15mm to 25mm, for example, it can be 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm or 25mm, etc. The wall thickness of the first sub-body 101 is within the above range. Under the premise of ensuring the supporting strength of the first sub-body 101, the uniformity of circumferential force on the first sub-body 101 can be improved. Combined with the variable diameter structure of the first sub-body 101, the supporting stability of the first sub-body 101 is further improved, thereby improving the overall service life of the structure.

[0049] The second sub-body 102 is fixed to the seabed at one end away from the first sub-body 101, and the other end of the second sub-body 102 is connected to the first sub-body 101 so that the first sub-body 101 and the second sub-body 102 are connected to form the main body 10 to provide support for the upper support structure.

[0050] At least a portion of the second sub-body 102 is located below sea level to ensure that the portion of the second sub-body 102 below sea level can be firmly fixed to the seabed, providing stable support for the superstructure. The length of the portion of the second sub-body 102 below sea level can account for 50% to 100% of the overall length of the second sub-body 102. The specific length of the second sub-body 102 below sea level can be adjusted according to actual needs. The lengths of the second sub-body 102 and the first sub-body 101 are coordinated and adjusted to ensure the structure and length of the main body 10 required by the superstructure.

[0051] The second sub-body 102 can be a variable diameter structure. In the direction from the seabed to the sea level, the outer diameter of the second sub-body 102 gradually decreases, and the inner diameter of the second sub-body 102 gradually decreases to ensure the uniformity of the sidewalls of the second sub-body 102. When the second sub-body 102 is subjected to external forces, the force on the sidewalls is ensured to be uniform, and the force on the bottom end of the second sub-body 102 is greater than that on the top end, avoiding deformation of the top end of the second sub-body 102 under stress, which would be detrimental to improving the stability of the upper support structure.

[0052] The outer diameter of the second sub-body 102 can be 1000mm to 1200mm, for example, 1000mm, 1050mm, 1100mm, 1150mm or 1200mm. The outer diameter of the second sub-body 102 is within the above range. Under the premise of ensuring the supporting strength of the second sub-body 102, the lightweight performance of the first sub-body 101 is improved, which facilitates the transportation and installation of the main body 10 and saves costs.

[0053] The wall thickness of the second sub-body 102 can be 15mm to 25mm, for example, it can be 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm or 25mm, etc. The wall thickness of the second sub-body 102 is within the above range. Under the premise of ensuring the supporting strength of the second sub-body 102, the uniformity of circumferential force on the second sub-body 102 can be improved. Combined with the variable diameter structure of the second sub-body 102, the supporting stability of the second sub-body 102 is further improved, thereby improving the overall service life of the structure.

[0054] The first sub-body 101 and the second sub-body 102 are interconnected. For example, the first sub-body 101 and the second sub-body 102 can be detachably connected; after being separately manufactured, they are connected by welding, riveting, screwing, bonding, or other methods. For example, the first sub-body 101 and the second sub-body 102 can be an integrally formed structure.

[0055] In some embodiments, the axis of the first sub-body 101 coincides with the axis of the second sub-body 102. Regardless of whether the first sub-body 101 and the second sub-body 102 are detachably connected or integrally formed, this coincidence is intended to improve the overall stress uniformity of the main body 10 and extend its service life. It should be noted that due to manufacturing process errors or assembly errors, the coincidence of the axis of the first sub-body 101 and the axis of the second sub-body 102 can refer to a strict coincidence, or it can mean that the two axes are parallel and have a certain distance between them. For example, a distance between the two axes within 0mm to 5mm can also be considered as the two axes coinciding.

[0056] In some embodiments, the outer diameter of the first sub-body 101 and the second sub-body 102 at the connection point is the same. For example, when the first sub-body 101 and the second sub-body 102 are integrally formed, the outer diameter of the connection point is the same, which facilitates the manufacturing of the main body 10. For example, when the first sub-body 101 and the second sub-body 102 are detachably connected, the outer diameter of the connection point is the same, which ensures the reliability of the connection.

[0057] In some embodiments, the outer diameters at the connection points of the first sub-body 101 and the second sub-body 102 may be different. For example, when the first sub-body 101 and the second sub-body 102 are detachably connected, the diameter of the first sub-body 101 end may be larger than the diameter of the second sub-body 102 end. When connecting them, the first sub-body 101 end can cover the second sub-body 102 end before the connection is made, thereby increasing the connection strength of the connection portion and ensuring the reliability of the connection. Alternatively, when the first sub-body 101 and the second sub-body 102 are detachably connected, the diameter of the first sub-body 101 end may be smaller than the diameter of the second sub-body 102 end. When connecting them, the second sub-body 102 end can cover the first sub-body 101 end before the connection is made, thereby increasing the connection strength of the connection portion and ensuring the reliability of the connection.

[0058] In some embodiments, the ratio of the length of the first sub-body 101 to the length of the second sub-body 102 can be 1:1 to 1:2. The length ratio between the two is within the above range, which can ensure the stable fixation of the main body 10 and provide a stable structural foundation for the subsequent connection and construction of the upper support structure.

[0059] In the embodiments provided in this disclosure, such as Figure 2 and Figure 3 As shown, combined with Figure 1 The structure includes a reinforcing rib 103. At least one reinforcing rib 103 is provided on the inner wall of the second sub-body 102. The reinforcing rib 103 extends along a direction parallel to the axis of the main body 10 and is perpendicular to the inner wall of the second sub-body 102. When the main body 10 extends into the seabed and is fixed to the seabed, the reinforcing rib 103 can provide fixation for the main body 10 in multiple directions, preventing the main body 10 from shifting on the seabed and improving the reliability of the main body 10.

[0060] The ratio of the length of the reinforcing rib 103 to the length of the second sub-body 102 can be 1:1 to 1:3, for example, 1:1, 1:1.5, 1:2, 1:2.5, or 1:3. The length of the reinforcing rib 103 can be determined based on the length of the second sub-body 102 extending into the seabed. For example, if the second sub-body 102 extends a longer distance into the seabed, the proportion of the reinforcing rib 103 to the length of the second sub-body 102 will be larger; if the second sub-body 102 extends a shorter distance into the seabed, the proportion of the reinforcing rib 103 to the length of the second sub-body 102 will be smaller. The length of the reinforcing rib 103 needs to be determined according to the usage requirements. While ensuring its fixing function, the length of the reinforcing rib 103 should not be too long to avoid structural redundancy caused by excessive length, which would be detrimental to the transportation and installation of the structure.

[0061] The number of reinforcing ribs 103 can be 4 to 10. For example, the number of reinforcing ribs 103 can be 4, 5, 6, 7, 8, 9, or 10. For example, the length and width of each reinforcing rib 103 can be the same to reduce the manufacturing difficulty of the second sub-body 102 and improve the symmetry of the second sub-body 102, ensuring stable structural support. For example, the length and width of each reinforcing rib 103 can be different or partially different. The structural parameters of each reinforcing rib 103 can be determined according to actual usage requirements, improving the adaptability of the structure to the marine environment.

[0062] It should be noted that the length of each reinforcing rib 103 refers to the dimension of the reinforcing rib 103 in the direction parallel to the axis of the second sub-body 102, and the width of each reinforcing rib 103 refers to the dimension of the reinforcing rib 103 projected onto the sea level.

[0063] In some embodiments, such as Figure 2 As shown, combined with Figure 1 There are multiple reinforcing ribs 103, which are evenly distributed along the circumferential direction of the inner wall of the second sub-body 102. One side of each reinforcing rib 103 is connected to the inner wall of the second sub-body 102. The ratio of the length of the projection of each reinforcing rib 103 on the sea level to the inner diameter of the second sub-body 102 is less than one-half. The other side of the multiple reinforcing ribs 103 can be a composite cylindrical or near-cylindrical structure, so that the reinforcing ribs 103 and the second sub-body 102 are combined into a ring structure. When the main body 10 is fixed in the seabed, the reinforcing ribs 103 can limit the main body 10 in multiple directions to ensure the verticality of the structure and provide stability.

[0064] In some embodiments, such as Figure 3 As shown, combined with Figure 1 There are multiple reinforcing ribs 103, which are arranged in a crisscross pattern. The two sides of each reinforcing rib 103 are connected to the inner sidewall of the second sub-body 102. The multiple crisscrossing reinforcing ribs 103 can not only provide multi-directional restraint for the structure, but also improve the overall strength of the structure and prevent deformation or damage.

[0065] The structure provided in this disclosure uses reinforcing ribs 103 inside the main body 10. On the one hand, the reinforcing ribs 103 limit the main body 10 fixed to the seabed, preventing it from moving in the sea and ensuring its verticality, thus providing a stable structural foundation for the subsequent installation of photovoltaic modules. On the other hand, by using reinforcing ribs 103 inside the hollow structure, the overall structural strength of the main body 10 can be improved, thereby enhancing the stability and safety of the structure.

[0066] In the embodiments provided in this disclosure, such as Figure 1 As shown, the structure also includes a lifting lug structure, wherein the lifting lug structure includes a first lifting lug 104 and a second lifting lug 105.

[0067] like Figure 5 As shown, combined with Figure 1 There are two first lifting lugs 104, which are symmetrically arranged on the outer side wall of the first sub-body 101, and each first lifting lug 104 is perpendicular to the axis of the first sub-body 101. When transporting the pile foundation structure, the pile foundation structure can be lifted by the first lifting lugs 104 to move the pile foundation structure to the preset position.

[0068] like Figure 6 As shown, combined with Figure 1 There is one second lifting lug 105, which is installed on the outer wall of the second sub-body 102 and is perpendicular to the axis of the second sub-body 102. When transporting the pile foundation structure, the pile foundation structure can be lifted using the second lifting lug 105 to move the pile foundation structure to a preset position.

[0069] Furthermore, the connection line between the second lifting lug 105 and the second sub-body 102 is on the same straight line as the connection line between the first lifting lug 104 and the first sub-body 101. Through the cooperation of the second lifting lug 105 and the first lifting lug 104, when lifting and transporting the structure, the first lifting lug 104 and the second lifting lug 105 can be used simultaneously according to the lifting requirements to ensure the stability of the lifting and the change of the angle of the pile foundation structure during the lifting process, so that the structure can be applied to various lifting postures and lifting conditions, thereby ensuring the reliability of the subsequent installation of the structure.

[0070] In some embodiments, the first lifting lug 104 and the second lifting lug 105 can be detachably connected to the main body 10, for example, by means of bolt connection or rivet connection. When in use, the first lifting lug 104 and the second lifting lug 105 can be connected to the main body 10, and when not in use, the first lifting lug 104 and the second lifting lug 105 can be removed from the main body 10, which improves the ease of use of the first lifting lug 104 and the second lifting lug 105, and also makes it easier to replace the first lifting lug 104 and the second lifting lug 105 when damaged.

[0071] In some embodiments, the first lifting lug 104 and the second lifting lug 105 can also be non-detachably connected to the main body 10. For example, the first lifting lug 104 or the second lifting lug 105 can be fixed to the outer side wall of the main body 10 by welding, bonding or other methods. This can ensure the connection strength of the first lifting lug 104 and the second lifting lug 105 during use and prevent breakage.

[0072] In some embodiments, the first lifting lug 104 and the second lifting lug 105 are positioned such that the center of gravity of the line connecting the two is the center of gravity of the main body 10, so as to avoid the main body 10 from shifting during hoisting and improve the safety of hoisting and transportation of the structure.

[0073] In some embodiments, the first lifting lug 104 may be located at the center of gravity of the first sub-body 101, and the second lifting lug 105 may be located at the center of gravity of the second sub-body 102. When the structure is hoisted and transported by the first lifting lug 104 and the second lifting lug 105, the balance of the hoisting can be guaranteed, and the safety during the hoisting and transportation process can be improved.

[0074] In some embodiments, the first lifting lug 104 and the second lifting lug 105 may adopt the same structure. Taking the first lifting lug 104 as an example, Figure 4 As shown, combined with Figure 5 The first lifting lug 104 may include a lifting lug body 201 and a support portion 202. The support portion 202 is disposed on both sides of the lifting lug body 201, and one end of the support portion 202 is connected to the outer side wall of the body 10. The support portion 202 may be a triangular or triangular structure to improve the structural strength of the first lifting lug 104 and the second lifting lug 105.

[0075] The offshore photovoltaic system provided in this disclosure may include multiple upper support structures arranged in an array. Each upper support structure adopts multiple pile foundation structures provided in the above embodiments. For example, four pile foundation structures may be used on one upper support structure.

[0076] Furthermore, to ensure the power output of the photovoltaic modules located on the upper support structure, the upper support structure typically has a predetermined angle with the sea level. Therefore, the various pile foundation structures supporting the upper support structure will be subjected to different external forces. In this disclosure, multiple pile foundation structures supporting the same upper support structure can have different outer diameters. For example, within the same upper support structure, the outer diameter of the pile foundation structure with a higher elevation is smaller than the outer diameter of the pile foundation structure with a lower elevation, to ensure the strength and support stability of each pile foundation structure.

[0077] It should be noted that the elevation of a pile foundation structure refers to the height or length of the portion of the pile foundation structure above sea level, which can be understood as the distance between the top of the pile and the sea level.

[0078] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A pile foundation structure for an offshore photovoltaic (PV) superstructure, the offshore PV superstructure comprising a superstructure support structure and PV modules, the PV modules being installed on the superstructure support structure, and the pile foundation structure supporting the superstructure support structure, characterized in that... include: The main body is a hollow, cylindrical structure that extends in a direction perpendicular to the sea level. The main body includes a first sub-body and a second sub-body that are connected to each other. The outer diameter of the first sub-body is smaller than that of the second sub-body. The end of the second sub-body away from the first sub-body is fixed to the seabed. At least a portion of the first sub-body is located above the sea level. The end of the first sub-body away from the second sub-body is connected to the upper support structure. At least one reinforcing rib is provided on the inner sidewall of the second sub-body. The reinforcing rib extends along the axis parallel to the main body and is perpendicular to the inner sidewall of the second sub-body.

2. The pile foundation structure for the offshore photovoltaic superstructure according to claim 1, characterized in that, The number of reinforcing ribs is multiple, and the multiple reinforcing ribs are evenly distributed along the circumferential direction of the inner sidewall of the second sub-body. One side of each reinforcing rib is connected to the inner sidewall of the second sub-body, and the ratio of the length of the projection of each reinforcing rib on the sea level to the inner diameter of the second sub-body is less than one-half.

3. The pile foundation structure for the offshore photovoltaic superstructure according to claim 1, characterized in that, The number of reinforcing ribs is multiple, and the multiple reinforcing ribs are arranged in a cross pattern. The two sides of each reinforcing rib are respectively connected to the inner sidewall of the second sub-body.

4. The pile foundation structure for the offshore photovoltaic superstructure according to claim 2 or 3, characterized in that, The ratio of the length of each reinforcing rib to the length of the second sub-body is 1:1 to 1:

3.

5. The pile foundation structure for the offshore photovoltaic superstructure according to claim 1, characterized in that, The first sub-body is a variable diameter structure, and its outer diameter gradually decreases along the direction from the seabed to the sea level. The outer diameter of the first sub-body is 1000mm to 1200mm.

6. The pile foundation structure for the offshore photovoltaic superstructure according to claim 1, characterized in that, The second sub-body is a variable diameter structure, and its outer diameter gradually decreases along the direction from the seabed to the sea level. The outer diameter of the second sub-body is 1200mm to 1400mm.

7. The pile foundation structure for the offshore photovoltaic superstructure according to claim 5 or 6, characterized in that, The outer diameter of the first sub-body and the second sub-body at the connection point is the same.

8. The pile foundation structure for the offshore photovoltaic superstructure according to claim 7, characterized in that, The main body is a one-piece molded structure, and the axis of the first sub-body coincides with the axis of the second sub-body.

9. The pile foundation structure for the offshore photovoltaic superstructure according to claim 1, characterized in that, The wall thickness of the main body is 15mm to 25mm.

10. The pile foundation structure for the offshore photovoltaic superstructure according to claim 1, characterized in that, Two first lifting lugs are provided on the outer side wall of the first sub-body. The two first lifting lugs are symmetrically arranged on the outer side wall of the first sub-body, and each first lifting lug is perpendicular to the axis of the first sub-body. A second lifting lug is symmetrically arranged on the outer side wall of the second sub-body. The second lifting lug is perpendicular to the axis of the second sub-body. The line connecting the second lifting lug and the second sub-body is on the same straight line as the line connecting the first lifting lug and the first sub-body.

Images