Single-pile type offshore photovoltaic supporting structure and installation method

Abstract

The invention relates to a single-pile type offshore photovoltaic supporting structure and an installation method. The single-pile type offshore photovoltaic supporting structure is composed of an upper support structure, support piles, insertion type hoop connecting structures and prefabricated concrete rings. According to the invention, a traditional photovoltaic support installation method is changed, and an integral structure and an integral installation method technology are adopted; a traditional multi-pile support structure is changed, a single-pile type structure technology is adopted, a precast concrete ring reinforcing technology is adopted at the mud surface of a pile body, a constraint key technology which only has horizontal constraint and does not have rotation constraint is adopted between a precast concrete ring and a support pile body, and an insertion type hoop connecting structure technology is adopted for connection of an upper support and a support pile. The problems that the offshore photovoltaic support is rapidly constructed, the pile foundation construction precision is difficult to guarantee, and the ocean surface layer foundation soil bearing capacity is poor are well solved, the connecting structure is simple, construction is convenient and fast, and errors during module hoisting can be adapted.

Description

Technical Field

[0001] The invention relates to a single-pile offshore photovoltaic support structure and an installation method, which are applicable to the field of offshore photovoltaic power generation. Background Art

[0002] With the rapid development of solar energy technology, the efficiency of thin-film solar power generation has been rapidly improved, reaching 31%, and photovoltaic power generation technology has gradually become an important means of utilizing solar energy resources. This has made it possible for clean energy such as solar energy to gradually replace conventional fossil energy and greatly reduce the emission of toxic and harmful greenhouse gases such as CO2 and SO2.

[0003] my country's offshore photovoltaic industry has also developed rapidly. In the southeastern coastal areas of my country, many tidal flat photovoltaic projects have been built or entered the construction stage. However, the existing offshore photovoltaic power stations are mainly located on coastal tidal flats. With the rapid development of tidal flat photovoltaics, there are not many tidal flats that can be used for photovoltaic construction. In order to promote the application of photovoltaic power stations in offshore areas, it is necessary to propose a photovoltaic support structure that is better suitable for offshore.

[0004] Compared with onshore photovoltaic structures, offshore photovoltaic structures are mainly affected by wind and waves during construction and operation, making construction difficult. In addition, the cost of hoisting at sea is much higher than on land. Therefore, the hoisting work needs to be completed quickly and accurately to reduce construction costs and increase project benefits.

[0005] The traditional photovoltaic support structure generally adopts a multi-pile photovoltaic bracket, with 6-9 bracket piles set at the bottom, and the upper bracket structure connects the lower pile foundation to form a whole. This connection method is simple in structure, but has the following problems: (1) The traditional offshore photovoltaic bracket adopts the construction method of on-site installation, which requires connecting single steel sections at sea, then installing a single photovoltaic module on the bracket, and finally connecting the cables between the photovoltaic modules to form a photovoltaic array. The traditional on-site installation method has a large workload in offshore construction work, and offshore construction work is difficult, risky and expensive. (2) The construction of offshore photovoltaic pile foundations is greatly affected by wave loads, and the position of the pile top is likely to deviate greatly from the design, which poses a great challenge to the construction of the upper support; (3) The offshore environment is relatively harsh, and it is impossible to arrange a large number of personnel to install photovoltaic brackets and photovoltaic panels. For safety reasons, most of the structural installation should be arranged on land; (4) Offshore photovoltaic foundations are different from onshore photovoltaic foundations. Their dominant loads are transformed from vertical loads to horizontal wave currents and wind loads, and the seabed foundation soil is mostly silty soil with weak horizontal bearing capacity. Traditional offshore photovoltaics use cantilever pile structures. The pile and soil work together to form the horizontal bearing capacity of the pile. However, since the seabed foundation soil of the photovoltaic site is often silty soil, the horizontal bearing capacity of the soil is very low, which leads to a very low horizontal bearing capacity of the pile. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a single-pile offshore photovoltaic support structure and installation method, which can reduce the workload of offshore construction operations and improve the horizontal bearing capacity of the piles.

[0007] According to the first aspect of the present invention, the present invention adopts the following technical solution:

[0008] The single-pile offshore photovoltaic support structure is characterized in that it includes an upper support structure, a support pile, an inserted clamp connection structure and a precast concrete ring; the upper support includes an inclined rod, a web rod, a cross beam and a purlin; the inclined rod and the web rod, the inclined rod and the cross beam, the cross beam and the purlin are all connected by welding; the inserted clamp connection structure includes a connection structure with a guide block, a clamp structure and a top connecting steel plate; the inclined rod and the top connecting steel plate, the top of the support pile and the annular connecting steel plate, the connection structure with a guide block and the top connecting steel plate, the connection structure with a guide block and the clamp structure are all connected by welding; the upper support structure is installed on the upper part of the support pile through the inserted clamp connection structure; the precast concrete ring includes an annular precast concrete block, a convex arc constraint key and an outer stabilizing structure, and the annular precast concrete block, the convex arc constraint key and the outer stabilizing structure are formed at one time during the early prefabrication process; the precast concrete ring is sleeved on the mud surface outside the support pile.

[0009] In the technical solution of the present invention, the upper support adopts an integral structure and an integral installation method technology, that is, the upper module structure is independent as a whole, the upper module is constructed at an onshore construction site, and after the photovoltaic components in the module are installed and the cables are connected at the onshore construction site, the entire module is transported to the sea for installation.

[0010] The technical solution of the present invention adopts a single pile structure technology, that is, an upper bracket is installed on the upper part of a bracket pile, and the whole structure is a cantilever structure. The single pile offshore photovoltaic support structure forms a unit in an offshore wind farm, and multiple photovoltaic panels are installed in an array on the same unit.

[0011] The technical solution of the present invention adopts the prefabricated concrete ring reinforcement technology at the mud surface of the pile body, that is, after the pile is sunk, a prefabricated concrete ring is inserted on the outside of the pile, and the prefabricated concrete ring sinks into the mud surface by its own weight and later scouring; the prefabricated concrete ring is hollow, and the outside adopts an outer stabilizing structure, the inside contacts the pile body through a constraint key, and the outside adopts an outer stabilizing structure to increase the contact surface with the soil. The outer stabilizing structure can adopt a gear-shaped structure.

[0012] In the technical solution of the present invention, a constraint key technology with only horizontal constraint and no rotation constraint is used between the precast concrete ring and the pile body. That is, a convex arc constraint key is set in the precast concrete ring, the constraint key surface is about 10mm away from the outer surface of the pile body, and there is only point contact with the pile body, which can constrain the horizontal deformation of the pile body but cannot constrain the rotation.

[0013] Preferably, in the technical solution of the present invention, the support piles are pipe piles, including a pipe pile body and a pipe pile end plate; the top connecting steel plate is an annular connecting steel plate, and the annular connecting steel plate is welded to the pipe pile end plate.

[0014] Furthermore, the diagonal rod of the upper support includes a front diagonal rod and a rear diagonal rod; the web rod of the upper support includes a front web rod, a rear web rod and a horizontal web rod; the horizontal web rod connects the front diagonal rod and the rear diagonal rod of the upper support to form a whole; the crossbeam of the upper support includes a north-south crossbeam and an east-west crossbeam, the north-south crossbeam and the east-west crossbeam are connected by welding, the front web rod connects the front diagonal rod and the crossbeam to form a whole; the rear web rod connects the rear diagonal rod and the diagonal beam to form a whole; the purlin of the upper support is installed on the north-south crossbeam and connected by welding; the photovoltaic panel connection structure is composed of bolts, upper gaskets, lower gaskets and nuts, the photovoltaic panel is installed on the purlin through the photovoltaic panel connection structure, and is fixed by bolts and nuts.

[0015] In the technical solution of the present invention, an inserted clamp connection structure is adopted between the upper block and the pile top, that is, the connection structure is fixed on the upper block, constructed, transported and installed together with the upper block, and its inner diameter is slightly larger than the outer diameter of the pile. When the upper block is installed as a whole, a wedge-shaped guide block is provided at the bottom of the connection structure to help the connection structure to be smoothly inserted into the outside of the pile; a clamp is preset at the bottom end of the connection structure, which is connected to the pile body through the clamp, and after the upper block is installed on the pile top together with the connection structure, the clamp bolt is tightened to fix the connection structure on the pile top; after the connection structure clamp is installed, its top end is connected to the pile top steel plate by welding.

[0016] Furthermore, the connection structure with guide block of the inserted clamp connection structure is composed of a U-shaped connecting steel plate, an L-shaped connecting steel plate and a wedge-shaped guide structure; the U-shaped connecting steel plate and the L-shaped connecting steel plate are connected by welding and then welded to the top connecting steel plate; the semi-annular steel plate of the clamp structure is connected to the U-shaped connecting steel plate and the L-shaped connecting steel plate by welding.

[0017] According to the second aspect of the present invention, the present invention adopts the following technical solution:

[0018] The installation method of a single pile offshore photovoltaic support structure is characterized by:

[0019] First, according to the requirements of the drawings, the upper support structure, support piles, inserted hoop connection structure, and precast concrete rings were prefabricated;

[0020] Secondly, the upper support structure is installed on the upper part of the top connecting steel plate of the inserted clamp connection structure and welded;

[0021] Thirdly, the photovoltaic panel connection structure is used to install the photovoltaic panel on the top purlin of the upper support structure with the plug-in clamp connection structure;

[0022] Next, the support piles and prefabricated concrete rings are transported to the photovoltaic field construction site, and then the support piles are sunk according to the design requirements;

[0023] Next, the prefabricated concrete ring is inserted into the support pile, and is sunk into the mud surface by its own weight and subsequent scouring;

[0024] Next, the upper support structure with the inserted clamp connection structure and photovoltaic panels installed is transported to the offshore photovoltaic field construction site, then hoisted to the top of the support pile, and sleeved on the upper part of the single-pile support pile through the wedge-shaped guide structure, and slowly lowered until the pipe pile end plate at the top of the support pile contacts the top connection steel plate of the inserted clamp connection structure;

[0025] Finally, tighten the connecting screws and nuts of the clamp structure, and then complete the welding work between the pipe pile end plate at the top of the support pile and the top connecting steel plate of the inserted clamp connection structure, and the installation of the single pile offshore photovoltaic support structure is completed.

[0026] Due to the adoption of the technical solution of the present invention, the beneficial effects of the present invention are:

[0027] (1) Adopting integrated structure and integrated installation method technology: ① Reduce the workload of offshore construction, speed up offshore construction, and reduce offshore installation costs; ② Compared with the traditional technology that requires installing steel components one by one at sea, installing photovoltaic modules one by one at sea, and completing the connection of each cable one by one at sea, the integrated structure and integrated installation method only need to be installed once at sea, which greatly reduces the workload of offshore construction.

[0028] (2) The use of single-pile structure technology can well adapt to the construction error of the pile, and the construction accuracy requirements of the pile are very low: Due to the complex offshore piling process, the wave force and wind force during piling are strong, and the offshore piling positioning is difficult. After piling, the plane position and pile top elevation errors of the pile are large. If a multi-pile structure is used, multiple piles share a superstructure, which requires the plane position and pile top elevation of the pile to be very accurate, otherwise it cannot be accurately installed; while in a single-pile structure, one upper block is installed on one pile, and the construction error of a single pile will not cause installation problems. This has low requirements for piling accuracy, and also makes the offshore piling speed fast and the piling cost low.

[0029] (3) Use precast concrete ring reinforcement technology at the mud surface of the pile body: ① Increase the horizontal bearing capacity of the pile. Since the foundation soil is relatively soft, the pile has a large horizontal deformation at the mud surface. Therefore, adding horizontal constraints to the pile body at the mud surface can greatly reduce the horizontal deformation of the pile and improve the horizontal bearing capacity of the pile; ② The precast concrete ring adopts a gear-like structure to increase the contact surface with the soil and is also easy to manufacture. The shape of the spindle column facilitates concrete pouring and demoulding during prefabrication, and also reduces the amount of concrete and the weight of the structure.

[0030] (4) Use the constraint key technology with only horizontal constraint and no rotation constraint between the precast concrete ring and the pile body: ① It can effectively play the role of horizontal constraint. The precast concrete ring applies horizontal constraint to the pile body through the constraint key, which can effectively reduce the horizontal deformation of the pile and improve the horizontal bearing capacity of the pile; ② Avoid local stress concentration caused by the rotation deformation of the pile body. If the surface constraint is used between the pile body and the precast concrete ring, when the pile body rotates, stress concentration will be formed at the upper and lower ends of the contact surface, resulting in local high stress areas of the pile body and the precast concrete ring, causing local concrete crushing of the pile body and the precast concrete ring; ③ Avoid the influence of the settlement of the precast concrete ring on the pile body. After the precast concrete ring is sunk, it has no rigid connection with the pile. The precast concrete ring will inevitably settle under the action of scouring, and uneven settlement may occur (the precast concrete ring rotates). If the surface constraint is used between the pile body and the precast concrete ring, the uneven settlement of the precast concrete ring may cause bending moment on the pile body, causing the pile body to tilt. When there is only horizontal constraint between the arc-shaped constraint key and the pile body, no bending moment will be generated on the pile body, and the settlement of the precast concrete ring will not have an adverse effect on the pile body.

[0031] (5) Use the inserted clamp connection structure technology: ① Easy installation. The connection structure is fixed on the upper block and is built, transported and installed together with the upper block. No additional installation process is required. The connection with the pile adopts a clamp. Only the bolts of the clamp need to be tightened on site. The on-site work workload is small and the installation speed is fast. ② The connection is reliable. After the clamp is connected, the temporary fixation of the upper block is completed and the installation machinery can be withdrawn. The top steel plate of the connection structure is then connected to the pile top steel plate by welding to ensure the reliability of the connection and prevent connection failure caused by loosening of the clamp, rust and other factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is an elevation view of the single pile offshore photovoltaic support structure of the present invention;

[0033] Figure 2 This is a plan view of the single pile offshore photovoltaic support structure of the present invention;

[0034] Figure 3 This is a diagram of the photovoltaic panel connection structure of the present invention;

[0035] Figure 4 This is a vertical view of the plug-in type clamp connection structure of the present invention;

[0036] Figure 5 It is a plan view of the plug-in type clamp connection structure of the present invention;

[0037] Figure 6 This is a cross-sectional view of the plug-in type clamp connection structure of the present invention;

[0038] Figure 7 This is a vertical view of the insert-type clamp connection structure of the present invention;

[0039] Figure 8 It is a plan view of the precast concrete ring of the present invention;

[0040] Fig. 9 This is a precast concrete ring elevation view of the present invention;

[0041] In the figure, 1-upper support, 11-diagonal rod, 111-front diagonal rod, 112-rear diagonal rod, 12-web rod, 121-front web rod, 122-rear web rod, 123-horizontal web rod, 13-cross beam, 131-north-south cross beam, 132-east-west cross beam, 14-C-shaped purlin, 15-photovoltaic panel, 16-photovoltaic panel connection structure, 161-bolt, 162-upper gasket, 163-lower gasket, 164-nut, 2-bracket pile, 21-pile body, 22-pile End plate, 3-insertion type clamp connection structure, 31-connection structure with guide block, 311-U-type connection steel plate, 312-L-type connection steel plate, 313-wedge-shaped guide structure, 32-clamp structure, 321-semi-annular steel plate, 322-connection steel plate, 323-reserved hole of connection steel plate, 324-connection screw, 325-nut, 33-shaped connection steel plate, 4-precast concrete ring, 41-annular precast concrete block, 42-convex arc-shaped constraint key, 43-gear-shaped structure. DETAILED DESCRIPTION

[0042] In order to further illustrate the content, features and effects of the present invention, an embodiment of a single-pile offshore photovoltaic support structure is listed and described as follows with reference to the accompanying drawings.

[0043] This embodiment is an offshore photovoltaic power plant. The normal water level depth in the photovoltaic power station area is 0.52m, the mud surface elevation is -6m to -4m, and the wave height once in 50 years is 5m.

[0044] The upper support of the single-pile offshore photovoltaic support structure is 11.51m long from east to west, 11.36m wide from north to south, with an inclination of 15°. A single photovoltaic support can install 66 photovoltaic panels.

[0045] refer to Figure 1The single-pile offshore photovoltaic support structure consists of four parts: an upper support structure 1, a support pile 2, an inserted clamp connection structure 3 and a precast concrete ring 4; the upper support structure 1 is installed on the upper part of the support pile 2 through the inserted clamp connection structure 3; the precast concrete ring 4 is sleeved on the mud surface outside the support pile 2, and sinks into the mud surface by its own weight and subsequent scouring.

[0046] refer to Figure 1 -3, the upper support 1 is composed of an oblique rod 11, a web rod 12, a cross beam 13, a C-shaped purlin 14 and a photovoltaic panel connection structure 16; the oblique rod includes two front oblique rods 111 and two rear oblique rods 112; the web rod 12 includes four front web rods 121, four rear web rods 122 and four horizontal web rods 123, where the horizontal plane refers to the plane parallel to the photovoltaic panel; the horizontal web rod 123 connects the front oblique rod 111 and the rear oblique rod 112 to form a whole; the cross beam 13 includes two north-south cross beams 131 and two east-west cross beams 132, the north-south cross beams 131 and the east-west cross beams 132 are connected by welding, and the front web rods 121 and the rear web rods 122 are connected by welding. Rod 121 connects the front diagonal rod 111 and the cross beam 13 to form a whole; the rear web rod 122 connects the rear diagonal rod 112 and the diagonal beam 12 to form a whole; ten C-shaped purlins 14 are installed on the upper part of the north-south cross beam 131; the diagonal rod 11 and the web rod 12, the diagonal rod 11 and the cross beam 13, the web rod 12 and the cross beam 13, and the cross beam 13 and the C-shaped purlin 14 are all connected by welding; the photovoltaic panel connection structure 16 is composed of bolts 161, upper gaskets 162, lower gaskets 163 and nuts 164; the photovoltaic panel 15 is installed on the C-shaped purlin 14 through the photovoltaic panel connection structure 16, and is fixed by bolts 161 and nuts 164.

[0047] refer to Figure 4 The support pile 2 is a concrete pipe pile, including a pipe pile body 21 and a pipe pile end plate 22.

[0048] refer to Figure 4-7, the inserted hoop connection structure 3 includes a connection structure 31 with a guide block, a hoop structure 32 and an annular connection steel plate 33; the annular connection steel plate 33 and the pipe pile end plate 22, the inclined rod 11 and the annular connection steel plate 33, the connection structure 31 with a guide block and the annular connection steel plate 33, and the connection structure 31 with a guide block and the hoop structure 32 are all welded; the connection structure 31 with a guide block includes a U-shaped connection steel plate 311 and an L-shaped connection steel plate 312, and the lower ends of the U-shaped connection steel plates 311 and the L-shaped connection steel plates 312 are provided with a wedge-shaped guide structure 313, and the U-shaped connection The connecting steel plate 311 and the L-shaped connecting steel plate 312 are connected by welding and then welded to the annular connecting steel plate 33; the hoop structure 32 includes two semi-annular steel plates 321 and a connecting screw 324, and the connecting steel plates 322 are welded at both ends of the semi-annular steel plate 321. The connecting steel plate reserved holes 323 are set on the connecting steel plates 322. The connecting screw 324 passes through the connecting steel plate reserved holes 323 of the two connecting steel plates 322 and is fixed by a nut 325; the semi-annular steel plate 321 of the hoop structure 32 is connected to the U-shaped connecting steel plate 311 and the L-shaped connecting steel plate 312 by welding.

[0049] refer to Figure 8 -9, the precast concrete ring 4 includes an annular precast concrete block 41, a convex arc-shaped constraint key 42 is arranged on the inner side of the annular precast concrete block 41, and a gear-shaped structure 43 is arranged on the outer side. The annular precast concrete block 41, the arc-shaped constraint key 42 and the gear-shaped structure 43 are formed at one time during the early prefabrication process.

[0050] The installation method of the monopile offshore photovoltaic support structure of this embodiment includes the following steps:

[0051] S1 completes the prefabrication of the upper support structure 1, support piles 2, inserted hoop connection structure 3, and prefabricated concrete ring 4 according to the requirements of the design drawings;

[0052] S2: installing the upper support structure 1 on the upper part of the annular connecting steel plate 33 of the plug-in clamp connection structure 3 and welding;

[0053] S3 will use the photovoltaic panel connection structure 16 to install the photovoltaic panel 15 on the top of the upper support structure 1 with the plug-in clamp connection structure 3;

[0054] S4 transports the support pile 2 and the prefabricated concrete ring 4 to the construction site of the photovoltaic field, and then completes the pile sinking work of the support pile 2 according to the design requirements;

[0055] S5: insert the prefabricated concrete ring 4 into the support pile 2, and sink it into the mud surface by its own weight and subsequent scouring;

[0056] S6: The upper support structure 1 with the inserted clamp connection structure 3 and the photovoltaic panel 15 installed is transported to the construction site of the offshore photovoltaic field, and then hoisted to the top of the support pile 2, and is sleeved on the upper part of the single-pile support pile 2 through the wedge-shaped guide structure 313, and is slowly lowered until the pipe pile end plate 22 on the top of the support pile 2 contacts the annular connection steel plate 33 of the inserted clamp connection structure 3;

[0057] S7 tightens the connecting screw 324 and nut 325 of the clamp structure 32, and then completes the welding work of the pipe pile end plate 22 at the top of the support pile 2 and the upper annular connecting steel plate 33 of the inserted clamp connection structure 3, and the installation of the single pile offshore photovoltaic support structure is completed.

[0058] The technical solution of the present invention solves the problem of manufacturing and installing offshore photovoltaic support structures well, and the project plan has a small amount of engineering work at sea, strong economy, and convenient construction, which is easy to promote and use in offshore photovoltaic fields.

[0059] It should be noted that the above describes the embodiments of the present invention. However, those skilled in the art should understand that the present invention is not limited to the above embodiments, which are only used to illustrate the principles of the present invention. The present invention may be subject to various changes and modifications without departing from the scope of the present invention, and these changes and modifications all fall within the scope of the present invention to be protected.

Claims

1. Single pile offshore photovoltaic support structure, characterized by The invention comprises an upper support structure (1), a support pile (2), an inserted hoop connection structure (3) and a precast concrete ring (4); the upper support (1) comprises an inclined rod (11), a web rod (12), a cross beam (13) and a purlin (14); the inclined rod (11) and the web rod (12), the inclined rod (11) and the cross beam (13), the web rod (12) and the cross beam (13), and the cross beam (13) and the purlin (14) are all connected by welding; the inserted hoop connection structure (3) comprises a connection structure with a guide block (31), a hoop structure (32) and a top connection steel plate; the inclined rod (11) and the top connection steel plate, the support pile (2) and the top connection steel plate are connected by welding; The upper support structure (1) is installed on the upper part of the support pile (2) through the inserted hoop connection structure (3); the precast concrete ring (4) comprises an annular precast concrete block (41), a convex arc-shaped constraint key (42) and an outer stabilizing structure, and the annular precast concrete block (41), the convex arc-shaped constraint key (42) and the outer stabilizing structure are formed at one time during the prefabrication process; the precast concrete ring (4) is sleeved on the mud surface outside the support pile (2).

2. The monopile offshore photovoltaic support structure according to claim 1 is characterized in that The support pile (2) is a pipe pile, comprising a pipe pile body (21) and a pipe pile end plate (22); the top connecting steel plate is an annular connecting steel plate (33), and the annular connecting steel plate (33) is welded to the pipe pile end plate (22).

3. The monopile offshore photovoltaic support structure according to claim 1 is characterized in that The diagonal rod (11) of the upper support (1) comprises a front diagonal rod (111) and a rear diagonal rod (112); the web rod (12) of the upper support (1) comprises a front web rod (121), a rear web rod (122) and a horizontal web rod (123); the horizontal web rod (123) connects the front diagonal rod (111) and the rear diagonal rod (112) of the upper support (1) to form a whole; the cross beam (13) of the upper support (1) comprises a north-south cross beam (131) and an east-west cross beam (132); the north-south cross beam (131) and the east-west cross beam (132) are connected by welding; the front diagonal rod (111) and the rear diagonal rod (112) of the upper support (1) are connected to each other by welding; The web member (121) connects the front diagonal member (111) and the cross beam (13) to form a whole; the rear web member (122) connects the rear diagonal member (112) and the diagonal beam (12) to form a whole; the purlin (14) of the upper bracket (1) is installed on the north-south cross beam (131) and connected by welding; the photovoltaic panel connection structure (16) is composed of bolts (161), upper washers (162), lower washers (163) and nuts (164); the photovoltaic panel (15) is installed on the purlin (14) through the photovoltaic panel connection structure (16) and fixed by bolts (161) and nuts (164).

4. The monopile offshore photovoltaic support structure according to claim 1, characterized in that The connecting structure (31) with a guide block of the insert-type clamp connecting structure (3) is composed of a U-shaped connecting steel plate (311), an L-shaped connecting steel plate (312) and a wedge-shaped guiding structure (313); the U-shaped connecting steel plate (311) and the L-shaped connecting steel plate (312) are connected by welding and then welded to the top connecting steel plate; the semi-annular steel plate (321) of the clamp structure (32) is connected to the U-shaped connecting steel plate (311) and the L-shaped connecting steel plate (312) by welding.

5. The monopile offshore photovoltaic support structure according to claim 1, characterized in that The outer stabilizing structure adopts a gear-shaped structure (43).

6. The monopile offshore photovoltaic support structure according to claim 1, characterized in that The monopile offshore photovoltaic support structure forms a unit in an offshore wind farm, and a plurality of photovoltaic panels (15) are installed in an array on the same unit.

7. The installation method of the monopile offshore photovoltaic support structure according to claim 1, characterized in that: First, according to the requirements of the drawings, the upper support structure (1), the support piles (2), the inserted hoop connection structure (3), and the precast concrete ring (4) are prefabricated; Secondly, the upper support structure (1) is installed on the upper part of the top connecting steel plate of the plug-in clamp connection structure (3) and welded; Next, the photovoltaic panel (15) is installed on the top purlin (14) of the upper support structure (1) with the plug-in clamp connection structure (3) using the photovoltaic panel connection structure (16); Next, the support pile (2) and the prefabricated concrete ring (4) are transported to the photovoltaic field construction site, and then the support pile (2) is sunk according to the design requirements; Next, the prefabricated concrete ring (4) is inserted into the support pile (2) and is sunk into the mud surface by its own weight and subsequent scouring; Next, the upper support structure (1) installed with the inserted clamp connection structure (3) and the photovoltaic panel (15) is transported to the offshore photovoltaic field construction site, then hoisted to the top of the support pile (2), and is sleeved on the upper part of the single-pile support pile (2) through the wedge-shaped guide structure (313), and slowly lowered until the pipe pile end plate (22) at the top of the support pile (2) and the top connection steel plate (33) of the inserted clamp connection structure (3) are in contact; Finally, tighten the connecting screw (324) and nut (325) of the clamp structure (32), and then complete the welding work between the pipe pile end plate (22) at the top of the support pile (2) and the upper top connecting steel plate (33) of the inserted clamp connection structure (3), and the installation of the single pile offshore photovoltaic support structure is completed.

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