Photovoltaic pile for offshore wind plant

Abstract

The photovoltaic pile comprises a pile body, a reinforcement cage and an end plate, the pile body is made of concrete, and the reinforcement cage is embedded in the pile body and comprises N longitudinal bars extending in parallel in the length direction of the pile body and stirrups spirally distributed around the longitudinal bars; n is a natural number greater than 1; the end plates are arranged at the two ends of the pile body; the longitudinal bars are staggered in two rows around the central axis of the pile body, and each row of longitudinal bars are located on the same circumference. The problems of corrosion, fatigue, shearing force, bending moment and the like of the pile body in the marine environment are effectively solved, higher structural strength and durability are provided, and stable operation and long-term benefits of an offshore wind plant are ensured.

Description

Technical Field

[0001] The present application relates to prefabricated pile related technologies, and in particular to a photovoltaic pile for offshore wind farms. Background Art

[0002] Offshore wind farms are developing rapidly around the world, especially in coastal areas. Due to their advantages as renewable energy and low carbon emissions, they are regarded as an important part of the future energy structure transformation. At the same time, solar photovoltaic technology is also constantly improving. Using photovoltaic piles to lay solar panels in offshore wind farms can effectively improve energy utilization efficiency, achieve the complementarity of wind and solar energy, and enhance the stability of the power system. This composite energy utilization method can not only reduce dependence on a single energy source, but also further increase the proportion of green energy, which is in line with the current global trend of environmental protection and sustainable development. Therefore, research and development of photovoltaic pile technology suitable for offshore wind farms has important economic and social significance.

[0003] At present, the development of offshore photovoltaic technology and pipe pile technology has achieved certain results. The wide application of pipe pile technology in coastal areas has made it widely recognized in the infrastructure construction of offshore wind farms. Modern pipe pile technology mainly uses prefabricated pipe piles and special equipment to pile on the seabed, ensuring the stability and durability of the foundation of offshore wind farms. The application of solar photovoltaic technology on land is relatively mature, especially in large-scale photovoltaic power stations and distributed photovoltaic systems, showing good economic benefits and technical reliability. Research on the deployment of photovoltaic systems in offshore wind farms is gradually being carried out, and some pilot projects have begun to verify the feasibility of this composite energy system. However, most of the current research focuses on technical feasibility and initial application effects, and the system optimization and long-term stability research of the comprehensive utilization of wind and solar energy is relatively insufficient.

[0004] Although offshore photovoltaic pile technology shows broad prospects in theory and practice, it still faces many challenges in practical application. The harsh offshore environment, salt spray, tides, wind and waves and other natural factors have put forward higher requirements on the materials and structures of photovoltaic piles, and it is necessary to develop special materials and design solutions with strong corrosion resistance and high wind and wave resistance. Utility Model Content

[0005] The purpose of the utility model is to provide a photovoltaic pile for an offshore wind farm, in order to solve the above-mentioned problems existing in the prior art.

[0006] Technical solution, according to one aspect of the present application, a photovoltaic pile for an offshore wind farm includes:

[0007] The pile body is made of concrete.

[0008] A steel cage is embedded in the pile body and includes N longitudinal bars extending in parallel along the length direction of the pile body and stirrups arranged spirally around the longitudinal bars; N is a natural number greater than 1; the longitudinal bars include at least one of prestressed bars and non-prestressed bars;

[0009] End plates are installed at both ends of the pile body;

[0010] The longitudinal reinforcements are arranged in two rows in a staggered manner around the central axis of the pile body, and each row of longitudinal reinforcements is located on the same circumference.

[0011] According to one aspect of the present application,

[0012] The longitudinal bars are arranged on a first circle and a second circle with the pile shaft centerline as the center. A longitudinal bar on the second circle is located at the intersection of the symmetry line of the fan-shaped area formed by adjacent longitudinal bars on the first circle and the pile shaft centerline and the second circle.

[0013] According to one aspect of the present application,

[0014] The longitudinal reinforcement is arranged on a first circle and a second circle with the pile shaft centerline as the circle center, and a longitudinal reinforcement on the second circle and a line connecting two longitudinal reinforcements closest to it on the first circle form an isosceles triangle.

[0015] According to one aspect of the present application,

[0016] The longitudinal reinforcement is arranged on a first circle and a second circle with the pile shaft center axis as the circle center, and a longitudinal reinforcement on the first circle and a line connecting two longitudinal reinforcements closest to the longitudinal reinforcement on the second circle form an isosceles triangle.

[0017] According to one aspect of the present application,

[0018] The outer circumferences of the longitudinal reinforcements on the first circumference and the second circumference are provided with positive stirrups and reverse stirrups, and the positive stirrups and reverse stirrups extend in clockwise and counterclockwise directions respectively;

[0019] The outer circumference of the longitudinal reinforcement on the first circumference or the second circumference is provided with positive stirrups and reverse stirrups, and the positive stirrups and reverse stirrups extend in the clockwise and counterclockwise directions respectively.

[0020] According to one aspect of the present application,

[0021] The end plate is provided with a predetermined group of radially arranged rib-piercing hole units, each group of rib-piercing holes comprises a first rib-piercing hole and a second rib-piercing hole, and the first rib-piercing holes and the second rib-piercing holes on adjacent rib-piercing hole units are alternately arranged in the radial direction.

[0022] According to one aspect of the present application,

[0023] The radial angle α between adjacent rib perforation holes is 12°, and the radial angle β between adjacent first rib perforation holes or adjacent second rib perforation holes is 24°.

[0024] According to one aspect of the present application,

[0025] The outer periphery of the pile body is provided with carbon fiber cloth or corrosion-resistant coating.

[0026] According to one aspect of the present application,

[0027] The longitudinal reinforcement and / or stirrups are carbon fiber reinforced plastic reinforcements, which are formed by twisting steel wires or by steel bar bundles.

[0028] According to one aspect of the present application,

[0029] Adjacent pile bodies are connected by mechanical connection components and then fixed by welding along the circumference of the pile body.

[0030] Beneficial effects: By optimizing the configuration of longitudinal reinforcement, adopting bidirectional stirrups, applying mechanical connection components and welding fixation, and selecting high-performance materials, the application effect of photovoltaic piles in offshore wind farms has been significantly improved. Specifically, this solution can effectively solve the problems of corrosion, fatigue, shear force and bending moment faced by the pile body in the marine environment, provide higher structural strength and durability, and ensure the stable operation and long-term benefits of offshore wind farms. From the perspective of structural mechanics, these design optimization measures enable the pile body to disperse stress more evenly, improve the overall anti-destruction ability, and fully meet the stringent requirements of offshore wind farms. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the utility model.

[0032] Figure 2 It is a cross-sectional schematic diagram of the first embodiment of the utility model.

[0033] Figure 3 It is a cross-sectional schematic diagram of the second embodiment of the present utility model.

[0034] Figure 4 It is a schematic diagram of the end plate of the first embodiment of the utility model.

[0035] Figure 5 It is a schematic diagram of the end plate of the second embodiment of the utility model.

[0036] Figure 6 It is a schematic diagram of the end plate of the third embodiment of the present utility model.

[0037] Figure 7 It is a schematic diagram of the stirrup of the utility model.

[0038] Figure 8It is a schematic diagram of the pile connection structure of the first and second embodiments of the utility model.

[0039] Fig. 9 It is a schematic diagram of the pile connection structure of the third and fourth embodiments of the utility model.

[0040] Fig.10 It is a structural schematic diagram of the utility model after pile connection.

[0041] Fig.11 It is a comparison diagram of the cracking bending moment and the design bending moment of the utility model.

[0042] The respective reference numerals are:

[0043] 1 pile body, 2 reinforcement cage, 21 longitudinal reinforcement, 22 stirrups, 23 anchor bars, 3 end plate, 31 first reinforcement hole, 32 second reinforcement hole, 4 pile hoop, 5 pile connection. DETAILED DESCRIPTION

[0044] According to one aspect of the present application, a photovoltaic pile for an offshore wind farm includes:

[0045] The pile body is made of concrete.

[0046] The steel cage is embedded in the pile body and includes N longitudinal bars extending in parallel along the length direction of the pile body and stirrups spirally arranged around the longitudinal bars; N is a natural number greater than 1; the longitudinal bars include at least one of prestressed bars and non-prestressed bars; the direction along the length direction of the pile body or the axial direction is the longitudinal direction, the direction around the circumference of the pile body is the axial direction, and the direction from the axis to the outer wall is the radial direction.

[0047] End plates are installed at both ends of the pile body;

[0048] The longitudinal reinforcements are arranged in two rows in a staggered manner around the central axis of the pile body, and each row of longitudinal reinforcements is located on the same circumference.

[0049] In a certain embodiment, the longitudinal reinforcement is arranged on the first circumference and the second circumference with the central axis of the pile body as the center, forming two rows of staggered arrangements. This helps to improve the overall bending resistance and shear strength of the pile body. From a mechanical point of view, the staggered arrangement of the longitudinal reinforcement on the circumference can evenly distribute the stress, so that the pile body can more evenly disperse the pressure when subjected to external force, reduce local stress concentration, and thus improve the overall stability and durability of the structure.

[0050] According to one aspect of the present application, the longitudinal reinforcement is arranged on a first circle and a second circle with the pile shaft center axis as the center, and a longitudinal reinforcement on the second circle is located at the intersection of the symmetry line of the fan-shaped area formed by adjacent longitudinal reinforcements and the pile shaft center axis on the first circle and the second circle.

[0051] According to one aspect of the present application, the longitudinal bars are arranged on a first circle and a second circle with the pile shaft centerline as the center, and a longitudinal bar on the second circle and the line connecting the two longitudinal bars closest to it on the first circle form an isosceles triangle.

[0052] According to one aspect of the present application, the longitudinal bars are arranged on a first circle and a second circle with the pile shaft centerline as the center, and a longitudinal bar on the first circle and the line connecting the two closest longitudinal bars on the second circle form an isosceles triangle.

[0053] According to one aspect of the present application, the outer circumferences of the longitudinal reinforcements on the first circumference and the second circumference are provided with positive stirrups and reverse stirrups, and the positive stirrups and reverse stirrups extend in clockwise and counterclockwise directions, respectively;

[0054] The outer circumference of the longitudinal reinforcement on the first circumference or the second circumference is provided with positive stirrups and reverse stirrups, and the positive stirrups and reverse stirrups extend in the clockwise and counterclockwise directions respectively.

[0055] Positive and negative stirrups are arranged around the longitudinal reinforcement, extending in clockwise and counterclockwise directions respectively. This design can enhance the torsional rigidity and shear resistance of the pile body. The bidirectional arrangement of positive and negative stirrups helps to offset the shear forces from different directions, making the pile body more stable in complex marine environments and less prone to twisting and deformation.

[0056] According to one aspect of the present application, a predetermined group of radially configured rib-piercing hole units are provided on the end plate, each group of rib-piercing holes includes a first rib-piercing hole and a second rib-piercing hole, and the first rib-piercing holes and the second rib-piercing holes on adjacent rib-piercing hole units are radially staggered.

[0057] According to one aspect of the present application, the radial angle α between adjacent rib perforation holes is 12°, and the radial angle β between adjacent first rib perforation holes or adjacent second rib perforation holes is 24°.

[0058] In some embodiments, the predetermined group of radially arranged reinforcing hole units on the end plate, through the first reinforcing hole and the second reinforcing hole arranged in a radially staggered manner, enables the longitudinal reinforcing bar to be more accurately positioned during the installation process, ensuring its uniform distribution in the pile body. The radial angle design between adjacent reinforcing holes (α is 12°, β is 24°) further optimizes the spatial distribution of the longitudinal reinforcing bar, so that the pile body can better withstand shear force and bending moment when subjected to stress.

[0059] According to one aspect of the present application, carbon fiber cloth or corrosion-resistant coating is provided on the outer periphery of the pile body.

[0060] The outer periphery of the pile body is provided with carbon fiber cloth or corrosion-resistant coating, and the longitudinal reinforcement and stirrups are made of carbon fiber reinforced plastic bars. This material selection not only significantly improves the corrosion resistance of the pile body and prolongs its service life, but also reduces the weight of the structure, thereby reducing construction and transportation costs. Compared with traditional steel bars, carbon fiber reinforced plastic bars have higher tensile strength and durability, and can effectively resist corrosion and fatigue damage in seawater environments.

[0061] According to one aspect of the present application, the longitudinal reinforcement and / or stirrups are carbon fiber reinforced plastic reinforcements, which are formed by twisting steel wires or by steel bar bundles.

[0062] According to one aspect of the present application, adjacent pile bodies are connected by mechanical connection components and then fixed by welding along the circumference of the pile bodies.

[0063] In other words, in this embodiment, adjacent pile bodies are connected by mechanical connection components and then welded and fixed along the circumference of the pile bodies. This connection method ensures a firm connection between the pile bodies and improves the stability and earthquake resistance of the overall structure. The mechanical connection components provide precise positioning and efficient connection, while the welding fixation further enhances the integrity and anti-destruction ability of the structure.

[0064] In this embodiment, the longitudinal reinforcement is arranged on the first and second circumferences with the central axis of the pile body as the center, forming two rows of staggered arrangements. According to the experimental data and the attached drawings, the double-row longitudinal reinforcement configuration can significantly improve the bending resistance of the pile body. At each depth on and below the mud surface, the design bending moment is significantly higher than the cracking bending moment, which indicates that the structural design effectively improves the strength and stability of the pile body.

[0065] Specifically, the longitudinal reinforcement is staggered on the first and second circumferences, making the stress distribution more uniform and reducing the local stress concentration phenomenon. The experimental data in the attached figure show that within the depth range of -1 meter to -4 meters, the design bending moment is close to or reaches 988 kN·m, which is much higher than the cracking bending moment. This configuration not only improves the overall bearing capacity of the pile body, but also enhances its ability to resist external impact and vibration.

[0066] The carbon fiber cloth or corrosion-resistant coating on the outer periphery of the pile body, as well as the carbon fiber reinforced plastic bars used for the longitudinal bars and stirrups, make the pile body have higher corrosion resistance and durability. In the marine environment, salt spray and tidal corrosion to materials is a major challenge. By using corrosion-resistant materials, the service life of the pile body can be significantly extended and the maintenance and replacement costs can be reduced.

[0067] In some embodiments, the positive stirrups and the reverse stirrups extend in the clockwise and counterclockwise directions, respectively, which enhances the torsional stiffness and shear resistance of the pile. The bidirectional stirrup arrangement can not only effectively offset the shear forces from different directions, but also keep the pile stable in complex environments and not prone to twisting and deformation. Experimental data show that within the depth range of -3 meters to -5 meters, the design bending moment remains above 930 kN·m, proving the effectiveness of this design in practical applications.

[0068] In some embodiments, mechanical connection components and welding are used to fix adjacent pile bodies, which not only ensures a firm connection between the pile bodies, but also enhances the seismic performance of the overall structure. The accompanying drawings and experimental data show that within a large depth range (such as -10 meters to -14 meters), the design bending moment gradually decreases, but is still much higher than the cracking moment. This shows that the design of mechanical connection components and welding fixation effectively improves the structural integrity and anti-destruction ability of the pile body and ensures stability in deep water environments.

[0069] In summary, in this embodiment, from a mechanical point of view, the optimized configuration of longitudinal reinforcement, the application of corrosion-resistant materials, the layout of positive and negative stirrups, and the design of mechanical connection components and welding fixation have jointly improved the bending resistance, shear resistance and durability of the pile body, ensuring its reliability and stability in the complex marine environment. These measures not only solve many technical problems faced by traditional pile bodies in the marine environment, but also achieve higher technical effects and economic benefits.

[0070] It should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. Photovoltaic piles for offshore wind farms, including: The pile body is made of concrete. A steel cage is embedded in the pile body and includes N longitudinal bars extending in parallel along the length direction of the pile body and stirrups arranged spirally around the longitudinal bars; N is a natural number greater than 1; the longitudinal bars include at least one of prestressed bars and non-prestressed bars; End plates are installed at both ends of the pile body; It is characterized in that The longitudinal reinforcements are arranged in two rows in a staggered manner around the central axis of the pile body, and each row of longitudinal reinforcements is located on the same circumference.

2. The photovoltaic pile for an offshore wind farm according to claim 1, characterized in that: The longitudinal bars are arranged on a first circle and a second circle with the pile shaft centerline as the center. A longitudinal bar on the second circle is located at the intersection of the symmetry line of the fan-shaped area formed by adjacent longitudinal bars on the first circle and the pile shaft centerline and the second circle.

3. The photovoltaic pile for an offshore wind farm according to claim 1, characterized in that: The longitudinal reinforcement is arranged on a first circle and a second circle with the pile shaft center axis as the circle center, and a longitudinal reinforcement on the second circle and the connecting line of the two longitudinal reinforcements closest to it on the first circle form an isosceles triangle.

4. The photovoltaic pile for an offshore wind farm according to claim 1, characterized in that: The longitudinal reinforcement is arranged on a first circle and a second circle with the pile shaft centerline as the circle center, and a longitudinal reinforcement on the first circle and a line connecting two longitudinal reinforcements closest to the longitudinal reinforcement on the second circle form an isosceles triangle.

5. The photovoltaic pile for an offshore wind farm according to any one of claims 2 to 4, characterized in that: The outer circumferences of the longitudinal reinforcements on the first circumference and the second circumference are provided with positive stirrups and reverse stirrups, and the positive stirrups and reverse stirrups extend in clockwise and counterclockwise directions respectively; The outer circumference of the longitudinal reinforcement on the first circumference or the second circumference is provided with positive stirrups and reverse stirrups, and the positive stirrups and reverse stirrups extend in clockwise and counterclockwise directions respectively.

6. The photovoltaic pile for offshore wind farm according to claim 1, characterized in that: The end plate is provided with a predetermined group of radially arranged rib-piercing hole units, each group of rib-piercing holes comprises a first rib-piercing hole and a second rib-piercing hole, and the first rib-piercing holes and the second rib-piercing holes on adjacent rib-piercing hole units are alternately arranged in the radial direction.

7. The photovoltaic pile for offshore wind farm according to claim 6, characterized in that: The radial angle α between adjacent rib perforation holes is 12°, and the radial angle β between adjacent first rib perforation holes or adjacent second rib perforation holes is 24°.

8. The photovoltaic pile for an offshore wind farm according to claim 1, characterized in that: The outer periphery of the pile body is provided with carbon fiber cloth or corrosion-resistant coating.

9. The photovoltaic pile for an offshore wind farm according to claim 1, characterized in that: The longitudinal reinforcement and / or stirrups are carbon fiber reinforced plastic reinforcements, which are formed by twisting steel wires or by steel bar bundles.

10. The photovoltaic pile for an offshore wind farm according to claim 1, characterized in that: Adjacent pile bodies are connected by mechanical connection components and then fixed by welding along the circumference of the pile body.

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