Fiber reinforced composite anti-settling piles for offshore photovoltaics
By using fiber-reinforced composite materials in offshore photovoltaic facilities, and setting up ring-bar structures on their inner and outer walls and applying gravel structure layers, the problems of stability and erosion resistance of traditional concrete pipe piles in the near-shore tidal flats are solved, and the high strength and long-term stable operation of pipe piles are achieved.
Patent Information
- Application Number
- CN202420655727.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-04-01
AI Technical Summary
Traditional concrete pipe piles have problems such as excessive weight, insufficient seawater erosion resistance and difficulty in meeting long-term stability in photovoltaic facilities near the beach tidal flats, which has led to the threat of the overall stability of photovoltaic facilities.
Anti-settlement pipe piles made of fiber reinforced composite material (FRP) are equipped with multiple sets of ring reinforced rib structures on their inner and outer walls, combining gravel structure layers and adhesive connections to enhance the lateral friction resistance, bending resistance and settlement resistance of the pipe piles.
The overall stiffness and settlement resistance of the pipe piles are improved, and excessive deformation of the pipe piles is prevented when carrying photovoltaic modules and wind loads is carried out, ensuring the long-term and stable operation of offshore photovoltaic facilities, and reducing settlement risks.
Smart Images
Figure CN222730516U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of new energy engineering installation, in particular to a fiber-reinforced composite material anti-settling pipe pile for offshore photovoltaics. Background Art
[0002] With the global energy crisis and the continuous improvement of environmental protection awareness, renewable energy, especially solar photovoltaic power generation, has developed rapidly. Among them, coastal tidal flats have become an important site for the construction of large-scale photovoltaic power stations due to their vast land resources and high sunshine intensity. However, the geological conditions of coastal tidal flats are complex and changeable. Affected by multiple factors such as tides, groundwater level changes and seawater corrosion, conventional photovoltaic support foundation solutions are often difficult to meet the requirements of long-term stability.
[0003] Although traditional concrete pipe piles have a certain bearing capacity and durability, they expose many problems when used in photovoltaic facilities on offshore tidal flats: on the one hand, the heavy weight of concrete materials makes the pipe piles themselves too heavy, which not only increases the difficulty and cost of land transportation and offshore installation, but may also aggravate the settlement of the foundation; on the other hand, concrete has limited resistance to seawater erosion, and long-term immersion in seawater is prone to cracking and peeling, which in turn threatens the overall stability of photovoltaic facilities.
[0004] In this context, the industry urgently needs a new foundation reinforcement solution that can overcome the defects of traditional concrete pipe piles. This new type of pipe pile should have the characteristics of light weight, high strength, excellent anti-settlement performance and corrosion resistance, so as to adapt to the special application environment and technical requirements of photovoltaic power stations on offshore beaches.
[0005] However, the geology of coastal tidal flats is a thick silt layer, and it is necessary to use high-friction pile foundations or increase the length of pipe piles to improve the vertical bearing capacity of pipe piles and reduce pipe pile settlement. However, increasing the length of pipe piles will increase the project cost. Utility Model Content
[0006] In order to solve the above problems, the utility model provides a fiber reinforced composite material anti-settling pipe pile for offshore photovoltaics.
[0007] The utility model provides a fiber-reinforced composite anti-settling pipe pile for offshore photovoltaics, which adopts the following technical solution:
[0008] A fiber reinforced composite anti-settling pipe pile for offshore photovoltaics comprises an FRP pile body on which a plurality of groups of annular reinforcement structures are arranged, wherein the annular reinforcement structures are distributed along the axial direction of the FRP pile body structure.
[0009] Through the above technical solution, multiple sets of annular reinforcement structures are added to the FRP pile body, which effectively enhances the lateral friction resistance of the pile, improves the overall stiffness, bending resistance, pull-out resistance and settlement resistance, and prevents the pile from excessive deformation when bearing photovoltaic modules and wind loads, thus ensuring the long-term stable operation of offshore photovoltaic facilities.
[0010] As a preferred embodiment of the present invention, a crushed stone structure layer is further provided on the FRP pile body, and the crushed stone structure layer and the FRP pile body are connected by adhesive.
[0011] Through the above technical solution, the crushed stone structure layer connected by adhesive can increase the friction coefficient and bearing capacity between the pipe piles and the foundation, effectively preventing the pipe piles from settling. At the same time, the crushed stone layer can also play a role in buffering and dispersing foundation stress, thereby enhancing the adaptability and stability of the pipe piles in complex marine geological environments.
[0012] As a preferred embodiment of the utility model, the gravel structure layer includes a large-particle gravel structure layer and a small-particle gravel structure layer, and the small-particle gravel structure layer is embedded between the large-particle gravel structure layers; the gravel particle size of the large-particle gravel structure layer is 10-40mm, and the gravel particle size of the small-particle gravel structure layer is 2-10mm.
[0013] Through the above technical solution, the large-particle gravel layer provides the main support and permeability for the pipe piles, while the small-particle gravel layer fills the gaps between the large particles to form a compact anti-scour layer. The combined effect can effectively prevent the local and overall settlement of the pipe piles, while ensuring that the gravel layer has good drainage performance and reducing the additional settlement pressure caused by water accumulation.
[0014] As a preferred embodiment of the present invention, the crushed stone particle size of the large-particle crushed stone structure layer is 20-30 mm.
[0015] Through the above technical solution, the large-grained gravel layer in this particle size range can provide a perfect balance between support and permeability, which can prevent the gravel from penetrating the FRP pipe piles and ensure that the foundation pressure is effectively dispersed and transmitted.
[0016] As a preferred embodiment of the present invention, the crushed stone particle size of the small-particle crushed stone structure layer is 5-8 mm.
[0017] Through the above technical solution, this small-particle gravel layer can fill the gaps between large particles to the greatest extent, forming a dense protective layer, enhancing the protection of the outer wall of the pipe pile, effectively resisting seawater scouring and sediment extrusion, and further consolidating the anti-subsidence performance.
[0018] As a preferred embodiment of the present invention, the annular reinforcement is arranged on the outer wall or the inner wall of the FRP pile body.
[0019] Through the above technical solution, whether the annular reinforcement is set on the outer wall or the inner wall, the mechanical properties of the pipe pile can be improved. The outer wall setting can enhance the resistance of the pipe pile to external loads, while the inner wall setting can improve the stress state inside the pipe pile.
[0020] As a preferred embodiment of the present invention, the annular rib structure is annular ribs arranged at intervals, or a continuous spiral structure.
[0021] Through the above technical scheme, the annular rib structure can improve the local strength and overall stability of the pipe pile, and is particularly suitable for resisting circumferential loads; while the spiral structure can more evenly disperse the axial and circumferential loads while providing the same strength, thereby enhancing the torsional resistance and overall stiffness of the pipe pile. Both can be flexibly selected according to specific application scenarios and force analysis.
[0022] In summary, the present invention includes at least one of the following beneficial technical effects:
[0023] 1. By setting multiple sets of ring rib structures in the fiber reinforced composite (FRP) pile body for offshore photovoltaics, the lateral friction resistance of the pile is effectively enhanced, and the overall stiffness, bending resistance, pull-out resistance, and settlement resistance are improved, which prevents the pile from excessive deformation when bearing photovoltaic modules and wind loads, and ensures the long-term stable operation of offshore photovoltaic facilities. The ring rib structure can be set on the inner and outer walls of the pile body as needed. Whether it is annular ribs arranged at intervals or a continuous spiral structure, it can significantly improve the local and overall mechanical properties of the pile, adapt to different load conditions, and ensure that the pile can effectively prevent settlement and maintain excellent mechanical stability under various working conditions.
[0024] 2. A layered gravel structure layer is applied on the surface of the FRP pile body, and an adhesive is used to firmly connect it to the pile body. This not only increases the friction coefficient and bearing capacity between the pipe pile and the seabed foundation, reducing the risk of settlement, but the gravel layer can also disperse the foundation stress and increase the adaptability and durability of the pipe pile to changes in complex marine geological environments.
[0025] 3. The gravel structure layer adopts a large and small particle grading design, in which the large-particle gravel layer provides the main support and permeability, and the small-particle gravel layer fills in between, forming an efficient anti-scour and anti-sedimentation system, while optimizing drainage performance and reducing additional sedimentation pressure. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a structural schematic diagram of embodiment 1 of the utility model.
[0027] Figure 2 It is a structural schematic diagram of embodiment 2 of the present utility model.
[0028] Figure 3 It is a structural schematic diagram of embodiment 3 of the present utility model.
[0029] Figure 4 It is a structural schematic diagram of embodiment 4 of the present utility model.
[0030] Explanation of the reference numerals: 1. FRP pile body; 2. annular reinforcement; 3. crushed stone structure layer; 4. spiral structure. DETAILED DESCRIPTION
[0031] The following is combined with Figure 1-4 The utility model is described in further detail.
[0032] Example 1
[0033] like Figure 1 As shown, this embodiment discloses a fiber reinforced composite material anti-settlement pipe pile for offshore photovoltaics, including an FRP pile body 1. The FRP pile body 1 is made of glass fiber reinforced plastic through a precision winding process and has excellent corrosion resistance and high strength characteristics. A plurality of groups of ring rib structures are arranged on the outer wall of the FRP pile body 1 along the length direction (axial direction) of the FRP pile body 1. In this embodiment, the ring rib structure is annular ring ribs 2 spaced apart from each other. These ring ribs 2 are also formed through a winding process. They are closely attached to and embedded in the surface layer of the FRP pile body 1, just like stirrups in reinforced concrete structures, which significantly enhance the bending strength and shear bearing capacity of the FRP pile body 1. The ring ribs 2 can also reduce the plastic deformation of the soil at the pile end by improving the restraining effect of the FRP pile body 1, thereby enhancing the anti-settlement performance.
[0034] In order to enhance the contact surface between the FRP pile body 1 and the soil and disperse the stress, we set a gravel structure layer 3 at a specific depth (according to the actual use situation) on the surface of the FRP pile body 1. This gravel structure layer consists of two parts, namely, a large-grain gravel structure layer and a small-grain gravel structure layer. Among them, the gravel particle size of the large-grain gravel structure layer is 10-40mm, which mainly provides the support and permeability of the foundation; the gravel particle size of the small-grain gravel structure layer is 2-10mm, which is carefully embedded in the gaps of the large-grain gravel layer to form a dense anti-scour layer. The large-grain gravel structure layer and the small-grain gravel structure layer are formed by brushing glue on the glass fiber of the FRP pile body 1, and then sprinkling large-grain gravel and small-grain gravel on the FRP pile body 1. The combination of these two layers of gravel structure can effectively prevent the local and overall settlement of the pipe pile, and at the same time reduce the additional settlement pressure caused by water accumulation through good drainage performance. Through such a design, the bearing capacity of the pile foundation and the control effect of settlement are significantly improved.
[0035] Embodiment 2:
[0036] The rest of this embodiment is the same as that of the first embodiment, except that, in this embodiment, the multiple groups of annular reinforcement structures arranged on the outer wall of the FRP pile body 1 along the length direction (axial direction) of the FRP pile body 1 are continuous spiral structures 4 arranged along the length direction of the FRP pile body 1, and these continuous spiral structures 4 are also formed by winding glass fiber reinforced plastic fibers. The spiral structures 4 can more evenly disperse the axial and annular loads while providing equal strength, thereby enhancing the torsional resistance and overall stiffness of the pipe pile.
[0037] Embodiment 3:
[0038] The rest of this embodiment is the same as that of Embodiment 1, except that, in this embodiment, a plurality of groups of annular rib structures are provided on the inner wall of the FRP pile body 1 along the length direction (axial direction) of the FRP pile body 1. In this embodiment, the annular rib structures are annular ribs 2 spaced apart from each other. These annular ribs 2 are also formed by a winding process, and they are closely attached to and embedded in the inner layer of the FRP pile body 1.
[0039] Embodiment 4:
[0040] The rest of this embodiment is the same as that of Embodiment 3, except that, in this embodiment, the multiple groups of annular reinforcement structures arranged on the inner wall of the FRP pile body 1 along the length direction (axial direction) of the FRP pile body 1 are continuous spiral structures 4 arranged along the length direction of the FRP pile body 1, and these continuous spiral structures 4 are also formed by winding glass fiber reinforced plastic fibers.
[0041] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.
Claims
1. A fiber-reinforced composite anti-settling pipe pile for offshore photovoltaics, characterized in that: The invention comprises an FRP pile body, on which a plurality of groups of annular reinforcement structures are arranged, and the annular reinforcement structures are distributed along the axial direction of the FRP pile body structure.
2. The fiber-reinforced composite material anti-settling pipe pile for offshore photovoltaic use according to claim 1, characterized in that: A crushed stone structure layer is also arranged on the FRP pile body, and the crushed stone structure layer and the FRP pile body are connected by adhesive.
3. The fiber-reinforced composite material anti-settling pipe pile for offshore photovoltaic use according to claim 2, characterized in that: The crushed stone structure layer comprises a large-particle crushed stone structure layer and a small-particle crushed stone structure layer, wherein the small-particle crushed stone structure layer is embedded between the large-particle crushed stone structure layers; the crushed stone particle size of the large-particle crushed stone structure layer is 10-40mm, and the crushed stone particle size of the small-particle crushed stone structure layer is 2-10mm.
4. The fiber-reinforced composite material anti-settling pipe pile for offshore photovoltaic use according to claim 3, characterized in that: The crushed stone particle size of the large-particle crushed stone structure layer is 20-30 mm.
5. The fiber-reinforced composite material anti-settling pipe pile for offshore photovoltaic use according to claim 3, characterized in that: The crushed stone particle size of the small-particle crushed stone structure layer is 5-8 mm.
6. The fiber-reinforced composite material anti-settling pipe pile for offshore photovoltaic use according to claim 1, characterized in that: The annular reinforcement is arranged on the outer wall or the inner wall of the FRP pile body.
7. The fiber-reinforced composite anti-settling pipe pile for offshore photovoltaic use according to claim 1 or 6, characterized in that: The annular rib structure is annular ribs arranged at intervals, or a continuous spiral structure.