Large-diameter prefabricated pile applied to marine engineering and offshore photovoltaic support structure

Abstract

A large-diameter prefabricated pile applied to marine engineering and an offshore photovoltaic support structure, the large-diameter prefabricated pile comprising a concrete pile body with an axial hole and a ring-shaped end plate connected to one end of the concrete pile body, and further comprising two or more diagonal struts; wherein the radial distance from the inner circumferential wall of the ring-shaped end plate to the central axis of the concrete pile body is smaller than the radial distance from the inner circumferential wall of the concrete pile body to the central axis of the concrete pile body; and part of each diagonal strut is embedded in the concrete pile body, and another part of each diagonal strut is exposed outside the concrete pile body and connected to the ring-shaped end plate near the inner circumferential wall thereof. In the present application, the inner circumferential wall of the ring-shaped end plate can extend to the center of the axial hole, and when the large-diameter prefabricated pile is connected to the upper structure, the ring-shaped end plate and the upper structure are allowed to have a large deviation through the butt joint of the ring-shaped end plate and the upper structure, the connection quality of the ring-shaped end plate and the upper structure is easily ensured in actual construction, the connection structure with the upper structure is simplified, and the construction cost is reduced.

Description

Technical Field

[0001] This application relates to the field of photovoltaic pile engineering technology, specifically to a large-diameter precast pile and offshore photovoltaic support structure applied to marine engineering. Background Technology

[0002] Precast photovoltaic (PV) piles are a component of offshore solar photovoltaic (PV) systems, primarily used to support the PV brackets that hold the upper solar panels in place. Precast PV piles are typically modified from prestressed high-strength concrete pipe piles. Because they need to withstand the wave and current forces of the harsh marine environment, precast PV piles are often designed with a relatively large diameter, while the upper PV brackets are relatively smaller.

[0003] Currently, there are two main methods for connecting precast photovoltaic (PV) piles to their upper PV support structures: one is concrete pouring, and the other is conventional welding. Concrete pouring faces numerous challenges in offshore construction, resulting in low efficiency and high costs. Especially under the reciprocating loads of wind and waves at sea, the concrete struggles to form a tight bond with the PV support during solidification, leading to insufficient connection reliability. Conventional welding, on the other hand, requires extremely high precision and has a small tolerance range, making it difficult to guarantee connection quality in actual construction.

[0004] Offshore wind and wave loads are high, making construction precision difficult to control. When connecting the superstructure to the pile top, a reliable connection is required even with significant lateral positional deviations. The radial width of the end plate of conventional precast photovoltaic piles is flush with the wall thickness of the concrete pile body, thus its width is insufficient to meet the allowable deviation requirements for connection and butt joint construction. Furthermore, due to the small size of the lower connection structure of the photovoltaic support and the large diameter of the offshore photovoltaic piles, the use of ball joints results in a huge amount of steel consumption and high costs.

[0005] Therefore, there is an urgent need for a new type of precast pile that can reliably connect and provide reliable and stable support for photovoltaic brackets even when large lateral positional deviations are allowed during construction, and is also economical. Utility Model Content

[0006] The purpose of this application is to provide a large-diameter precast pile and offshore photovoltaic support structure for marine engineering, so as to solve the problems of poor reliability and small allowable deviation range in the connection between precast pile and photovoltaic support.

[0007] To achieve the objectives of this application, the following technical solution is provided:

[0008] In one aspect, this application provides a large-diameter precast pile for marine engineering, including a concrete pile body with an axial hole and an annular end plate connected to one end of the concrete pile body, and also including two or more inclined bracing members.

[0009] Wherein, the radial distance from the inner peripheral wall of the annular end plate to the central axis of the concrete pile body is less than the radial distance from the inner peripheral wall of the concrete pile body to its own central axis.

[0010] Each of the aforementioned diagonal bracing members is partially embedded in the concrete pile body, and another part of each of the aforementioned diagonal bracing members is exposed outside the concrete pile body and connected to the annular end plate near its own inner peripheral wall.

[0011] In one embodiment, the system further includes an outer skirt plate, which is located near the annular end plate and fitted onto the concrete pile body. The two ends of the diagonal brace are respectively connected to the annular end plate and the outer skirt plate.

[0012] In one embodiment, each of the inclined bracing members is elongated, and the inclination angle of the inclined bracing member relative to the central axis of the concrete pile body is 20° to 80°.

[0013] In one embodiment, the portion of each of the diagonal bracing members exposed outside the concrete pile body and / or the outer surface of the annular end plate and / or the outer skirt plate is provided with an anti-corrosion layer;

[0014] And / or, at least one of the diagonal bracing members has a different length or an angle of inclination relative to the central axis of the concrete pile than the other diagonal bracing members.

[0015] In one embodiment, the annular end plate includes a first annular plate and a second annular plate. The first annular plate is connected to one end of the outer skirt plate, and the inner edge of the first annular plate is connected to one end of the second annular plate. The second annular plate is arranged along the axial direction of the outer skirt plate, or the inner diameter of the second annular plate gradually decreases from one end close to the inner edge of the first annular plate to one end away from the inner edge of the first annular plate.

[0016] In one embodiment, the annular end plate further includes a third annular plate, which is connected to the end of the second annular plate away from the first annular plate, and the third annular plate extends axially along the outer skirt plate.

[0017] Secondly, this application also provides a marine photovoltaic support structure, including a lower foundation pile and an upper photovoltaic support, wherein the foundation pile is a large-diameter precast pile used in marine engineering as described in any of the various embodiments of the first aspect, and the photovoltaic support includes a support column and a guide connector located at the bottom of the support column;

[0018] The sidewall of the guide connector abuts against and connects with the inner peripheral wall of the annular end plate, and the lower part of the guide connector extends into the axial hole.

[0019] In one embodiment, the guide connector includes a first connecting plate and a second connecting plate connected together. The first connecting plate is connected to one end of the support column, and the second connecting plate is arranged around the first connecting plate. The first end of the second connecting plate is inserted into the axial hole, and the second connecting plate forms the sidewall of the guide connector.

[0020] In one embodiment, the guide connector includes a third connecting plate and a fourth connecting plate, the third connecting plate being sleeved on the support column and covering the second end of the second connecting plate.

[0021] The support column is hollow, and the fourth connecting plate is connected to the inner wall of the support column.

[0022] In one embodiment, a support member is further included, which is connected to the annular end plate and the guide connector.

[0023] Compared with the prior art, this application has at least the following beneficial effects:

[0024] 1. In this application, the radial distance from the inner circumferential wall of the annular end plate to the central axis of the concrete pile is less than the radial distance from the inner circumferential wall of the concrete pile to its own central axis. This allows the inner circumferential wall of the annular end plate to extend towards the center of the axial hole. When connecting a large-diameter precast pile to a small-diameter superstructure, the annular end plate allows for a larger deviation between it and the superstructure, making it easier to ensure the connection quality during actual construction. By reducing the inner diameter of the annular end plate, the connection structure between the large-diameter precast pile and the superstructure is simplified, reducing construction costs.

[0025] 2. In this application, the addition of diagonal bracing enhances the connection strength between the concrete pile and the annular end plate. In marine environments, large-diameter precast piles need to withstand complex loads, including vertical loads, horizontal loads, and dynamic loads caused by waves and currents. The diagonal bracing, partially embedded in the concrete pile and with its exposed portion connected to the annular end plate, tightly integrates the annular end plate with the concrete pile, forming a unified load-bearing structure. This effectively resists various loads and prevents loosening, cracking, or damage at the connection between the annular end plate and the concrete pile, thus ensuring the long-term stable use of large-diameter precast piles in marine environments. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is an isometric sectional view of a large-diameter precast pile according to one embodiment of this application;

[0028] Figure 2 This is a cross-sectional view of a large-diameter precast pile according to Embodiment 1 of this application;

[0029] Figure 3 This is a cross-sectional view of a large-diameter precast pile according to Embodiment 2 of this application;

[0030] Figure 4 This is a cross-sectional view of a large-diameter precast pile according to Embodiment 3 of this application;

[0031] Figure 5 This is a cross-sectional view of a large-diameter precast pile according to Embodiment 4 of this application;

[0032] Figure 6 This is an isometric sectional view of a large-diameter precast pile according to Embodiment 5 of this application;

[0033] Figure 7 This is a cross-sectional view of a large-diameter precast pile according to Embodiment 5 of this application;

[0034] Figure 8 This is a perspective view of a marine photovoltaic support structure according to one embodiment of this application;

[0035] Figure 9 This is an isometric sectional view of a marine photovoltaic support structure according to one embodiment of this application;

[0036] Figure 10 This is a cross-sectional view of a marine photovoltaic support structure according to one embodiment of this application;

[0037] Figure 11 This is a cross-sectional view of a marine photovoltaic support structure according to another embodiment of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 100. Large-diameter precast pile; 110. Concrete pile body; 111. Axial hole; 120. Annular end plate; 121. First annular plate; 122. Second annular plate; 123. Third annular plate; 130. Diagonal brace; 140. Outer skirt plate; 200. Photovoltaic bracket; 210. Support column; 220. Guide connector; 221. First connecting plate; 222. Second connecting plate; 223. Third connecting plate; 224. Fourth connecting plate; 225. Fifth connecting plate; 300. Support component. Detailed Implementation

[0040] The following are specific embodiments of this application, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of this application. However, this application is not limited to these embodiments.

[0041] refer to Figure 1 and Figure 2 This application provides a large-diameter precast pile 100 for marine engineering, including a concrete pile body 110 with an axial hole 111 and an annular end plate 120 connected to one end of the concrete pile body 110, and also including two or more inclined bracing members 130; wherein, the radial distance from the inner peripheral wall of the annular end plate 120 to the central axis a of the concrete pile body 110 is less than the radial distance from the inner peripheral wall of the concrete pile body 110 to its own central axis a; a portion of each inclined bracing member 130 is embedded in the concrete pile body 110, and another portion of each inclined bracing member 130 is exposed outside the concrete pile body 110 and connected to the annular end plate 120 near its own inner peripheral wall.

[0042] Specifically, the concrete pile body 110 is made of concrete, which has high compressive strength and can withstand the huge vertical loads in the marine environment, such as the weight transmitted from buildings and offshore platforms, ensuring that the pile body will not collapse during long-term use. The axial hole 111 of the concrete pile body 110 is formed by centrifugal processing, which helps to reduce the self-weight of the pile body and facilitates transportation and pile driving. The annular end plate 120 is connected to one end of the concrete pile body 110 (i.e., Figure 1 The annular end plate 120, located at the upper end of the concrete pile body 110, is a crucial component connecting the concrete pile body 110 to the superstructure (such as the foundation of an offshore platform or a pile cap). The annular end plate 120 evenly distributes the load, effectively distributing the force from the superstructure to the pile body. The diagonal brace 130 strengthens the connection between the concrete pile body 110 and the annular end plate 120. The portion embedded in the pile body is tightly bonded to the concrete, capable of withstanding internal stresses and preventing cracks or damage during loading. The exposed portion connecting to the annular end plate 120 enhances the connection rigidity between the annular end plate 120 and the pile body, allowing the annular end plate 120 to better coordinate with the concrete pile body 110 under load, thus improving the overall structural integrity of the precast pile.

[0043] In this application, the radial distance from the inner peripheral wall of the annular end plate 120 to the central axis a of the concrete pile body 110 is less than the radial distance from the inner peripheral wall of the concrete pile body 110 to its own central axis a. This allows the inner peripheral wall of the annular end plate 120 to extend towards the center of the axial hole 111. When connecting the large-diameter precast pile 100 to the superstructure, the connection between the annular end plate 120 and the superstructure allows for a larger deviation, making it easier to ensure the connection quality between the annular end plate 120 and the superstructure during actual construction. Simultaneously, by reducing the inner diameter of the annular end plate 120, the connection structure between the large-diameter precast pile 100 and the superstructure is simplified, reducing construction costs.

[0044] The diagonal bracing member 130 enhances the connection strength between the concrete pile body 110 and the annular end plate 120. In marine environments, the large-diameter precast pile 100 needs to withstand complex loads, including vertical loads, horizontal loads, and dynamic loads caused by waves and currents. The diagonal bracing member 130, partially embedded in the concrete pile body 110 and with its exposed portion connected to the annular end plate 120, tightly integrates the annular end plate 120 and the concrete pile body 110, forming a unified load-bearing structure. This effectively resists various loads and prevents loosening, cracking, or damage at the connection between the annular end plate 120 and the concrete pile body 110, thus ensuring the long-term stable use of the large-diameter precast pile 100 in marine environments.

[0045] The large-diameter precast pile 100 also includes an outer skirt plate 140. The outer skirt plate 140 is close to the annular end plate 120 and sleeved on the concrete pile body 110. The outer skirt plate 140 is welded and fixed to the annular end plate 120. The two ends of the diagonal brace 130 are respectively connected to the annular end plate 120 and the outer skirt plate 140. Specifically, by adding the annular end plate 120 to the concrete pile body 110, a plate-like structure is formed around the concrete pile body 110. The outer skirt plate 140, the diagonal brace 130, and the annular end plate 120 cooperate with each other to form a stable structural system, which helps to improve the lateral force resistance of the concrete pile body 110 and enhance the stability of the concrete pile body 110 in complex marine environments. Moreover, the outer skirt plate 140 can reduce the direct erosion of the concrete pile body 110 by seawater and sea wind, and slow down the aging and corrosion rate of the concrete pile body 110.

[0046] refer to Figure 2 and Figure 3 The annular end plate 120 can be connected to the inner wall of the outer skirt 140, so that the top surface of the annular end plate 120 is flush with the top surface of the outer skirt 140; or the annular end plate 120 can be connected to the top surface of the outer skirt 140, so that the annular end plate 120 is located above the outer skirt 140.

[0047] Furthermore, each diagonal brace 130 is elongated, and the inclination angle of the diagonal brace 130 relative to the central axis of the concrete pile body 110 is 20° to 80°. The elongated shape and inclination angle of the diagonal brace 130 allow it to effectively distribute the load borne by the annular end plate 120 to the outer skirt plate 140 and the concrete pile body 110 when transferring loads. When the inclination angle of the diagonal brace 130 is within the range of 20° to 80°, it can better decompose the vertical load into tensile or compressive forces along the direction of the diagonal brace 130, and a horizontal component transmitted to the outer skirt plate 140. This allows the entire structure to better resist lateral displacement, ensuring the verticality and stability of the large-diameter precast pile 100, and providing reliable foundation support for marine engineering facilities.

[0048] In this embodiment, each diagonal brace 130 has an anti-corrosion layer on the exposed portion of the concrete pile body 110 and / or the outer surface of the annular end plate 120 and / or the outer skirt plate 140; and / or, at least one diagonal brace 130 has a different length or inclination angle relative to the central axis of the concrete pile body 110 than the other diagonal braces 130. Specifically, in the harsh corrosive environment of marine engineering, the anti-corrosion layer on the exposed portion of the diagonal brace 130, the annular end plate 120, and the outer surface of the outer skirt plate 140 can effectively prevent seawater, salt, and other corrosive substances from eroding the components. The anti-corrosion layer can be made of various materials, such as epoxy resin, polyurethane coatings, or metal plating. Furthermore, the design of different lengths of the diagonal braces 130 and the differentiated inclination angles allows the precast piles to better adapt to the complex and varied marine geological and marine dynamic environments. When the large-diameter precast pile 100 is subjected to uneven loads or complex directional forces, the diagonal bracing members 130 with different lengths and inclination angles can distribute and transfer the load more reasonably, making the stress on the entire structure more uniform and reasonable, avoiding structural damage caused by excessive local stress, and improving the overall stability and bearing capacity of the structure.

[0049] refer to Figure 4 and Figure 5 The annular end plate 120 includes a first annular plate 121 and a second annular plate 122. The first annular plate 121 is connected to one end of the outer skirt plate 140, and the inner edge of the first annular plate 121 is connected to one end of the second annular plate 122. The second annular plate 122 is arranged along the axial direction of the outer skirt plate 140, or the inner diameter of the second annular plate 122 gradually decreases from the end near the inner edge of the first annular plate 121 to the end away from the inner edge of the first annular plate 121. Specifically, the first annular plate 121 serves as a transition structure to connect the second annular plate 122 to the concrete pile body 110, and the inner edge of the second annular plate 122 extends into the concrete pile body 110 to form a hole wall that connects with the superstructure.

[0050] Furthermore, the inner diameter of the second annular plate 122 gradually decreases from the end near the inner edge of the first annular plate 121 to the end away from the inner edge of the first annular plate 121. The second annular plate 122 is used to abut against the side wall of the upper structure, and its inclination angle matches the side wall angle of the upper structure to achieve surface contact. Under axial load, the contact surface generates uniform friction and support force, avoiding stress concentration.

[0051] refer to Figure 6 and Figure 7 The annular end plate 120 also includes a third annular plate 123, which is connected to the end of the second annular plate 122 away from the first annular plate 121. The third annular plate 123 extends axially along the outer skirt plate 140. The inner edge of the third annular plate 123 is connected to the inner edge of the second annular plate 122 and extends axially along the outer skirt plate 140 to form a support structure, thereby enhancing the connection strength between the annular end plate 120 and the concrete pile body 110.

[0052] It should be noted that the diagonal brace 130 can be connected to the first annular plate 121, the second annular plate 122, or the third annular plate 123. The diagonal brace 130 can be in the shape of a ribbed steel bar, a round steel bar, or a trapezoidal steel plate.

[0053] refer to Figure 8 , Figure 9 and Figure 10 This application also provides a marine photovoltaic support structure, including a lower foundation pile and an upper photovoltaic support 200. The foundation pile is the large-diameter precast pile 100 used in marine engineering mentioned above. The photovoltaic support 200 includes a support column 210 and a guide connector 220 located at the bottom of the support column 210. The side wall of the guide connector 220 abuts against and connects with the inner peripheral wall of the annular end plate 120, and the lower part of the guide connector 220 extends into the axial hole 111.

[0054] Specifically, the photovoltaic bracket 200 is inserted into the axial hole 111 through the annular sidewall of the bottom guide connector 220, so that during the installation of the photovoltaic bracket 200, the guide connector 220 can be quickly and accurately inserted into the axial hole 111 as the positioning reference, so as to achieve precise positioning.

[0055] In this application, the sidewall of the guide connector 220 abuts against and connects with the inner edge of the annular end plate 120, preferably by welding. This increases the contact area between the foundation pile and the photovoltaic support 200. The larger contact area allows for a tighter connection between the photovoltaic support 200 and the foundation pile, effectively dispersing the load borne by the photovoltaic support 200, reducing local stress concentration, and thus greatly improving the stability of the connection and reducing the risk of loosening or failure. Simultaneously, the sidewall structure of the guide connector 220 provides a guiding function when inserted into the axial hole 111, automatically adjusting the position of the photovoltaic support 200 to make it easier and more accurate to insert into the axial hole 111, reducing errors and adjustment time during installation, and improving installation convenience.

[0056] Furthermore, the outer diameter of the sidewall of the guide connector 220 gradually decreases from the end near the support column 210 to the end away from the support column 210, forming a conical or frustum-shaped structure. Specifically, the photovoltaic bracket 200 is inserted into the axial hole 111 through the frustum-shaped sidewall of the bottom guide connector 220. When the photovoltaic bracket 200 is under load, the tapering structure of the sidewall causes the insertion depth to be automatically adjusted, eliminating gaps caused by installation deviations. The frustum-shaped mating surface converts the vertical load into a radial expansion force, causing the sidewall of the guide connector 220 to continuously press against the inner edge of the annular end plate 120. The design of the circumferentially continuous contact surface ensures that the shear force is evenly distributed along the circumference, avoiding local stress concentration. This structure forms a self-locking effect in the axial direction and multi-point support in the lateral direction, and then achieves a stable connection through welding.

[0057] In this application, when the side wall of the guide connector 220 is inserted into the axial hole 111, the allowable deviation range between the diameter of the axial hole 111 and the outer diameter of the guide connector 220 is large, which makes it easy to ensure the connection quality between the foundation pile and the photovoltaic support 200 in actual construction.

[0058] The guide connector 220 includes a first connecting plate 221 and a second connecting plate 222 connected together. The first connecting plate 221 is connected to one end of the support column 210, and the second connecting plate 222 is arranged around the first connecting plate 221. The first end of the second connecting plate 222 is inserted into the axial hole 111, and the second connecting plate 222 forms the sidewall of the guide connector 220. The first connecting plate 221 is a flat plate directly fixed to the support column 210, used to transmit the load between the support column 210 and the foundation pile. The second connecting plate 222 is an annular member extending around the first connecting plate 221. Its outer diameter decreases axially, generating radial compressive force when inserted into the axial hole 111, enhancing connection stability.

[0059] Specifically, when the second connecting plate 222 is inserted into the axial hole 111 in a frustum-shaped structure, its tapering outer diameter forms an interference fit with the inner edge of the annular end plate 120. The frustum-shaped fit structure allows for a certain amount of construction deviation, making it particularly suitable for harsh offshore construction environments.

[0060] The guide connector 220 includes a third connecting plate 223 and a fourth connecting plate 224. The third connecting plate 223 is sleeved on the support column 210 and covers the second end of the second connecting plate 222. The support column 210 is hollow, and the fourth connecting plate 224 is connected to the inner wall of the support column 210. By covering the second end of the second connecting plate 222 with the third connecting plate 223, the connection node between the first connecting plate 221 and the second connecting plate 222 can be sealed, preventing rainwater and wind waves from entering the node and causing corrosion. The fourth connecting plate 224 is a plate-like structure set in the internal cavity of the support column 210 to enhance the bending stiffness and overall stability of the support column 210. When the fourth connecting plate 224 is set inside the support column 210, the connecting plate extends along the axial or radial direction of the support column 210, forming a rigid connection with the inner wall of the support column 210. When the photovoltaic support 200 is subjected to lateral loads generated by sea waves, the fourth connecting plate 224 effectively suppresses the local deformation of the support column 210 caused by its hollow structure by increasing the moment of inertia of the support column 210. At the same time, the fourth connecting plate 224 and the third connecting plate 223 of the connector form a double reinforcement structure, giving the connection between the support column 210 and the foundation pile a higher torsional resistance.

[0061] refer to Figure 11 In another embodiment, the third connecting plate 223 can be omitted, and a fifth connecting plate 225 can be connected between the outer wall of the support column 210, the first connecting plate 221 and the second connecting plate 222. The fifth connecting plate 225 can be a vertical rectangular plate, a trapezoidal plate or an irregularly shaped plate.

[0062] In one embodiment, the offshore photovoltaic support structure further includes a support member 300, which is connected to the annular end plate 120 and the guide connector 220. The support member 300 serves as a reinforcing structure connecting the annular end plate 120 and the guide connector 220, and can specifically be an I-beam or a T-beam. When the welding strength of the connection node between the connector and the annular end plate 120 is insufficient, an additional support member 300 is added to enhance the connection strength between the large-diameter precast pile 100 and the photovoltaic support 200.

[0063] In this application, the construction process of the offshore photovoltaic support structure is as follows:

[0064] 1. Design the thickness, dimensions, and placement of the annular end plate 120 and outer skirt plate 140 of the large-diameter precast pile 100 according to the design requirements;

[0065] 2. Fabricate the outer skirt plate 140, the annular end plate 120, and the diagonal brace 130, and connect the outer skirt plate 140, the annular end plate 120, and the diagonal brace 130 into a whole, and then centrifuge them;

[0066] 4. Assemble the support column 210, the first connecting plate 221, the second connecting plate 222, the third connecting plate 223 and the fourth connecting plate 224 or the support column 210, the first connecting plate 221, the second connecting plate 222, the fourth connecting plate 224 and the fifth connecting plate 225 into a whole;

[0067] 5. For offshore construction, first drive in large-diameter precast piles 100, and then insert the guide connector 220 of the upper photovoltaic support 200 into the axial hole 111.

[0068] 6. Weld the sidewall of the guide connector 220 to the annular end plate 120;

[0069] 7. As needed, the support 300 is fitted to the side wall of the guide connector 220 and welded to the annular end plate 120.

[0070] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0071] Furthermore, the use of terms such as "first," "second," and "a" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0072] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0073] Furthermore, the technical solutions of the various embodiments of this application can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this application.

Claims

1. A large-diameter precast pile for marine engineering, comprising a concrete pile body with an axial hole and an annular end plate connected to one end of the concrete pile body, characterized in that, It also includes two or more diagonal bracing components; Wherein, the radial distance from the inner peripheral wall of the annular end plate to the central axis of the concrete pile body is less than the radial distance from the inner peripheral wall of the concrete pile body to its own central axis. Each of the aforementioned diagonal bracing members is partially embedded in the concrete pile body, and another part of each of the aforementioned diagonal bracing members is exposed outside the concrete pile body and connected to the annular end plate near its own inner peripheral wall.

2. The large-diameter precast pile for marine engineering according to claim 1, characterized in that, It also includes an outer skirt plate, which is close to the annular end plate and fitted onto the concrete pile body, and the two ends of the diagonal brace are respectively connected to the annular end plate and the outer skirt plate.

3. The large-diameter precast pile for marine engineering according to claim 2, characterized in that, Each of the aforementioned diagonal bracing members is elongated, and the angle of inclination of the diagonal bracing member relative to the central axis of the concrete pile body is 20° to 80°.

4. The large-diameter precast pile for marine engineering according to claim 3, characterized in that, The portion of each of the diagonal bracing members exposed on the concrete pile body and / or the outer surface of the annular end plate and / or the outer skirt plate are provided with an anti-corrosion layer; And / or, at least one of the diagonal bracing members has a different length or an angle of inclination relative to the central axis of the concrete pile than the other diagonal bracing members.

5. The large-diameter precast pile for marine engineering according to claim 2, characterized in that, The annular end plate includes a first annular plate and a second annular plate. The first annular plate is connected to one end of the outer skirt plate. The inner edge of the first annular plate is connected to one end of the second annular plate. The second annular plate is arranged along the axial direction of the outer skirt plate, or the inner diameter of the second annular plate gradually decreases from one end close to the inner edge of the first annular plate to one end away from the inner edge of the first annular plate.

6. The large-diameter precast pile for marine engineering according to claim 5, characterized in that, The annular end plate further includes a third annular plate, which is connected to the end of the second annular plate away from the first annular plate, and the third annular plate extends along the axial direction of the outer skirt plate.

7. A marine photovoltaic support structure, comprising a lower foundation pile and an upper photovoltaic support frame, characterized in that, The foundation pile is a large-diameter precast pile used in marine engineering according to any one of claims 1 to 6, and the photovoltaic support includes a support column and a guide connector located at the bottom of the support column; The sidewall of the guide connector abuts against and connects with the inner peripheral wall of the annular end plate, and the lower part of the guide connector extends into the axial hole.

8. The marine photovoltaic support structure according to claim 7, characterized in that, The guide connector includes a first connecting plate and a second connecting plate connected together. The first connecting plate is connected to one end of the support column, and the second connecting plate is arranged around the first connecting plate. The first end of the second connecting plate is inserted into the axial hole, and the second connecting plate forms the side wall of the guide connector.

9. The marine photovoltaic support structure according to claim 8, characterized in that, The guide connector includes a third connecting plate and a fourth connecting plate. The third connecting plate is sleeved on the support column and covers the second end of the second connecting plate. The support column is hollow, and the fourth connecting plate is connected to the inner wall of the support column.

10. The marine photovoltaic support structure according to claim 7 or 8, characterized in that, It also includes a support member, which is connected to the annular end plate and the guide connector.

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