A scalable cellular onshore wind power foundation structure and construction method

Abstract

The application relates to the field of wind power generation, in particular to a scalable honeycomb land wind power foundation structure and a construction method, which comprises a plurality of honeycomb bottom plate units made of reinforced concrete, the plurality of honeycomb bottom plate units are arranged in a honeycomb shape, wherein the opposite surfaces of two adjacent honeycomb bottom plate units are respectively provided with a tenon groove and a tenon, the tenon groove and the tenon are inserted together, the plurality of honeycomb bottom plate units are woven together through prestressed anchor cables and anchor cable clamps, and a plurality of assembly type column elements are arranged on the honeycomb bottom plate units located at the middle part. The application has the advantages of short construction period, low cost, easy expansion and the like. In addition, the expansion method of the application is simple and easy to operate, can quickly respond to market demand and technical progress, and provides strong support for flexible planning and future development of a wind power plant.

Description

Technical Field

[0001] This invention relates to the field of wind power generation, and in particular to an expandable honeycomb onshore wind power foundation structure and construction method. Background Technology

[0002] With the continuous growth of global demand for renewable energy, onshore wind power, as a clean and renewable energy form, has seen its installed capacity and power generation efficiency continuously improve, while offshore wind turbine construction technology has also developed rapidly and become increasingly mature.

[0003] However, traditional wind power foundation structures, such as gravity foundations, spread foundations, or pile foundations, can meet the support requirements of wind turbine towers. However, when constructing wind power foundations, they are mostly made by on-site casting, which takes a long time and results in slow construction. Furthermore, when faced with the actual situation of continuous upgrading of wind turbine power and the need for expansion of wind farms, large-scale foundation reconstruction is often required to meet the expansion needs. Large-scale foundation reconstruction requires a lot of time, which leads to an increase in the construction cycle. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by proposing an expandable honeycomb onshore wind power foundation structure and construction method.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an expandable honeycomb-shaped onshore wind power foundation structure, comprising multiple honeycomb base plate units, wherein the honeycomb base plate units are made of reinforced concrete, and the multiple honeycomb base plate units are arranged in a honeycomb pattern, wherein the opposite faces of two adjacent honeycomb base plate units are respectively provided with tenons and grooves, the tenons and grooves are interlocked, the multiple honeycomb base plate units are woven together by prestressed anchor cables and anchor cable clamps, and prefabricated column elements are provided on the multiple honeycomb base plate units located in the middle, and multiple prefabricated ribs are evenly distributed on the outer side of the prefabricated column elements, and connecting members are provided between the prefabricated ribs and the honeycomb base plate units.

[0006] Preferably, the outer surface of the honeycomb base plate unit is provided with a connecting anchor cable hole, and the prestressed anchor cable passes through the connecting anchor cable hole.

[0007] Preferably, the prefabricated column element includes an upper column and a lower column, which are respectively attached to the upper and lower ends of multiple honeycomb base plate units in the middle. One end of the prefabricated rib is attached to the outer surface of the upper column, and the cross-section of one end of the prefabricated rib is larger than the cross-section of the other end. A T-slot is provided at the lower part of one end of the prefabricated rib. The upper column is made of reinforced concrete and is hexagonal in shape. A T-head is provided at the lower part of the outer surface of the upper column, and the T-head is inserted into the T-slot. A tower connecting bolt extends from the upper end face of the upper column.

[0008] Preferably, a bolt hole is provided through the upper part of one end of the precast rib, and a reserved screw hole is provided through the upper part of the outer surface of the upper column. A high-strength screw is provided through the bolt hole and the reserved screw hole.

[0009] Preferably, the lower end face of the upper column has a plurality of upper limit protrusions evenly distributed and extending, the upper limit protrusions being inserted into the upper part of the honeycomb base plate unit in the middle. The upper end face of the lower column has a plurality of lower limit protrusions evenly distributed and extending, the lower limit protrusions being inserted into the lower part of the honeycomb base plate unit in the middle. The inner bottom surface of the upper column has a plurality of upper column reserved bolt holes evenly distributed and extending to the lower end face of the upper limit protrusions. The upper end face of the lower limit protrusions has a lower column reserved bolt hole evenly distributed and extending. The lower end face of the lower column has a plurality of clamping expansion holes evenly distributed and extending, the clamping expansion holes communicating with the lower column reserved bolt holes. A column connecting screw is provided through the lower column reserved bolt hole and the upper column reserved bolt hole.

[0010] Preferably, the connector includes a prefabricated bottom anchor plate with a T-shaped cross-section. The prefabricated bottom anchor plate is located below the prefabricated rib plate. The small-diameter section of the prefabricated bottom anchor plate is inserted into the lower part of the external honeycomb bottom plate unit. The bottom of the prefabricated rib plate has multiple bottom plate reserved holes.

[0011] Preferably, a steel bolt is provided through the middle of the prefabricated bottom anchor plate, the steel bolt passes through the reserved hole in the bottom plate, and a nut is screwed onto the end of the steel bolt.

[0012] A construction method for an expandable honeycomb onshore wind power foundation structure is also provided, including the following steps:

[0013] S1: First, a detailed survey and assessment of the wind farm's foundation is required to determine its bearing capacity and stability. Then, the soil is excavated according to design requirements, and a subbase layer is laid to ensure the flatness and stability of the foundation structure.

[0014] S2: Next, begin installing the lower support column. During the installation process, it is necessary to ensure the verticality and positional accuracy of the lower support column to lay the foundation for subsequent installation work.

[0015] S3: Then, the honeycomb base plate unit and the precast bottom anchor plate are installed. During the installation process, the honeycomb base plate unit and the precast bottom anchor plate need to be laid in the predetermined order, and the honeycomb base plate unit is tightly connected together by prestressed anchor cables.

[0016] S4: Next, install the upper column and precast ribs. During the installation process, the upper column and lower column need to be aligned first, and the T-slots on the precast ribs are inserted into the T-heads of the upper column by sliding, and then they are tightly connected together by high-strength bolts.

[0017] S5: Finally, after all components are installed, the steel bolts on the precast bottom anchor plate must be tightened to ensure the stability of the structure. At the same time, all connections must be inspected and tightened to ensure the integrity and safety of the structure. In addition, the structure's levelness and verticality must be tested to ensure it meets design requirements.

[0018] It is worth mentioning that the construction method of the present invention is not only applicable to initial installation, but also facilitates future expansion. The expansion includes the following steps:

[0019] S1: First, carry out preparatory work before the expansion, and prepare the necessary expansion components, including new honeycomb base plate units, precast ribs, prestressed anchor cables, etc.

[0020] S2: Next, remove the precast ribs and prestressed anchor cables in the honeycomb base plate unit at the expansion location;

[0021] S3: Subsequently, according to the expansion design, new honeycomb base plate units are installed in sequence. The new honeycomb base plate units are connected to the old honeycomb base plate units through new prestressed anchor cables, and appropriate prestress is applied. The old anchor plate clamps are used for clamping.

[0022] S4: Finally, install the new precast ribs, fix them to the upper column and the new honeycomb base plate unit with high-strength bolts, and conduct a comprehensive inspection and testing of the expanded structure to ensure that it meets the design requirements and safety standards.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. This invention utilizes honeycomb base plate units made of reinforced concrete arranged in a honeycomb pattern, achieving structural lightweighting while maintaining excellent stability and load-bearing capacity. Furthermore, the unique honeycomb structure of the base plate units not only reduces the weight of the foundation structure but also effectively disperses stress, enhancing the structure's durability.

[0025] 2. In this invention, the upper and lower columns are aligned, and the T-slots on the prefabricated rib plate are inserted into the T-heads of the upper column by sliding insertion. They are then tightly connected together by high-strength bolts. Subsequently, the steel bolts on the prefabricated bottom anchor plate are tightened to fix the prefabricated rib plate and the honeycomb bottom plate unit together, thereby improving the overall rigidity and seismic performance of the structure and ensuring the safety and reliability of the wind power foundation structure in various complex environments.

[0026] 3. The honeycomb base plate unit, prefabricated column element, and prefabricated rib plate of this invention all adopt prefabricated components and on-site assembly, which greatly shortens the construction cycle. This construction method not only reduces the workload and difficulty of on-site construction, but also reduces the impact on the environment, making the construction of wind farms more efficient and environmentally friendly.

[0027] 4. This invention demonstrates unprecedented flexibility and scalability. By removing the precast ribs and prestressed anchor cables from the honeycomb base plate units at the expansion location, and then, according to the expansion design, installing new honeycomb base plate units sequentially, connecting the new honeycomb base plate units to the old ones using new prestressed anchor cables and applying appropriate prestress, and clamping them using the old anchor plate clamps, and finally installing new precast ribs, fixing them to the upper column and the new honeycomb base plate units with high-strength bolts, the wind power foundation structure can be rapidly expanded through simple removal and addition of components. This expansion method not only reduces expansion costs but also significantly shortens the expansion cycle, enabling wind farms to flexibly adjust and optimize according to market demand and technological advancements.

[0028] 5. The lightweight and prefabricated design of this invention reduces material consumption and transportation costs. Simultaneously, the use of assembly components such as bolts, mortises, tenons, and T-heads improves construction convenience, while the flexible expansion capabilities of disassembling and adding components reduce construction time and operating costs. These advantages collectively constitute the economic advantages of this invention, significantly reducing the overall construction and operating costs of wind farms and improving the return on investment and market competitiveness of wind power projects.

[0029] 6. The honeycomb base plate unit, prefabricated column element, and prefabricated rib plate components in this invention are reusable, effectively reducing material waste and energy consumption, and mitigating negative environmental impacts. Simultaneously, the flexible expansion capability allows wind farms to better adapt to future energy demand changes, making a positive contribution to the promotion and application of renewable energy. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of an expandable honeycomb onshore wind power foundation according to the present invention.

[0031] Figure 2This is a schematic diagram of a honeycomb base plate unit of an expandable honeycomb onshore wind power foundation structure according to the present invention;

[0032] Figure 3 This invention relates to a connection method for the honeycomb base plate unit of an expandable honeycomb onshore wind power foundation structure;

[0033] Figure 4 This is a combined view of the honeycomb base plate unit of an expandable honeycomb onshore wind power foundation structure according to the present invention;

[0034] Figure 5 This is a schematic diagram of a prefabricated rib plate for an expandable honeycomb-shaped onshore wind power foundation structure according to the present invention;

[0035] Figure 6 This is a connection view of the prefabricated rib plate and honeycomb base plate unit of an expandable honeycomb onshore wind power foundation structure according to the present invention.

[0036] Figure 7 This is a schematic diagram of the upper and lower columns of an expandable honeycomb onshore wind power foundation structure according to the present invention.

[0037] Figure 8 This is a schematic diagram of the upper and lower columns of an expandable honeycomb onshore wind power foundation structure according to the present invention from another perspective.

[0038] Figure 9 This is a connection view of the honeycomb base plate unit and the prefabricated column element of an expandable honeycomb onshore wind power foundation structure according to the present invention.

[0039] Figure 10 This is a view showing the connection between the upper column and the prefabricated rib plate of an expandable honeycomb onshore wind power foundation structure according to the present invention.

[0040] In the diagram: 1. Honeycomb base plate unit; 11. Mortise and tenon; 12. Tenon; 13. Connecting anchor cable hole; 2. Precast rib plate; 21. Bolt hole; 22. T-slot; 23. Base plate reserved hole; 24. Precast bottom anchor plate; 25. Steel bolt; 26. Nut; 3. Assembled column element; 31. Upper column; 311. Reserved bolt hole; 312. Tower connecting bolt; 313. Upper column reserved bolt hole; 314. Upper limit protrusion; 315. T-head; 316. High-strength bolt; 32. Lower column; 321. Lower limit protrusion; 322. Lower column reserved bolt hole; 323. Clamp enlargement hole; 324. Column connecting bolt; 4. Prestressed anchor cable; 5. Anchor cable clamp. Detailed Implementation

[0041] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0042] Example 1

[0043] like Figures 1-10 The diagram illustrates an expandable honeycomb-shaped onshore wind power foundation structure, comprising multiple honeycomb base plate units 1, each made of reinforced concrete. These units are arranged in a honeycomb pattern. This design not only reduces structural weight but also significantly enhances the foundation's load-bearing capacity and stability. Each adjacent honeycomb base plate unit 1 has a tenon 11 and a tenon 12 on its opposite face, which interlock to strengthen the connection between the multiple honeycomb base plate units 1. The multiple honeycomb base plate units 1 are woven together by prestressed anchor cables 4 and anchor clamps 5. The prestressed anchor cables 4 secure the multiple honeycomb base plate units together. The plate units 1 are connected together to form a stable foundation plate structure. The use of prestressed anchor cables 4 not only enhances the overall structure, but also ensures the firmness and longevity of the connection through the fixing of the anchor cable clamps 5. Since the use of anchor cable clamps 5 to fix the prestressed anchor cables 4 is an existing technology and has been widely used, it is not described in detail here, nor is it shown in detail in the figure. Multiple honeycomb base plate units 1 located in the middle are provided with prefabricated column elements 3. Multiple prefabricated ribs 2 are evenly distributed on the outer side of the prefabricated column elements 3. Connectors are provided between the prefabricated ribs 2 and the honeycomb base plate units 1.

[0044] The outer surface of the honeycomb base plate unit 1 is provided with a connecting anchor cable hole 13. The prestressed anchor cable 4 passes through the connecting anchor cable hole 13. The connecting anchor cable hole 13 facilitates the insertion of the prestressed anchor cable 4, thereby tightly weaving multiple honeycomb base plate units 1 together.

[0045] The prefabricated column element 3 includes an upper column 31 and a lower column 32, both made of high-strength reinforced concrete to ensure their load-bearing capacity and stability. The upper column 31 and lower column 32 are respectively attached to the upper and lower ends of multiple honeycomb base plate units 1 in the middle. One end of the prefabricated rib plate 2 is attached to the outer surface of the upper column 31. The cross-section of one end of the prefabricated rib plate 2 is larger than that of the other end. As an important component connecting the honeycomb base plate unit 1 and the prefabricated column element 3, the prefabricated rib plate 2 adopts a lightweight design and a variable cross-section design, with the cross-section increasing near the prefabricated column element 3. To improve its load-bearing capacity, a T-slot 22 is provided at the lower part of one end of the precast rib plate 2. The upper column 31 is made of reinforced concrete and is hexagonal in shape. A concentric cylindrical installation operation surface is left in the middle of the upper column 31 to facilitate connection and installation with the wind turbine tower. A T-head 315 is provided on the lower part of the outer surface of the upper column 31. The T-head 315 is inserted into the T-slot 22 to strengthen the connection between the upper column 31 and the precast rib plate 2. A tower connecting bolt 312 extends from the upper end face of the upper column 31 and serves to connect with the wind turbine tower.

[0046] A bolt hole 21 is provided through the upper part of one end of the precast rib plate 2, and a reserved screw hole 311 is provided through the upper part of the outer surface of the upper column 31. A high-strength screw 316 is provided through the bolt hole 21 and the reserved screw hole 311. The bolt hole 21 and the reserved screw hole 311 serve to allow the high-strength screw 316 to pass through for connection. During the installation of the precast rib plate 2, the precast rib plate 2 is hoisted to the predetermined position and connected to the steel T-head 315 of the upper column 31 by sliding insertion. Then, the precast rib plate 2 and the upper column 31 are fixed with the high-strength screw 316 to ensure a firm connection between the two.

[0047] Multiple upper limit protrusions 314 are evenly distributed and extended from the lower end face of the upper column 31. The upper limit protrusions 314 are inserted into the upper part of the honeycomb base plate unit 1 in the middle. Multiple lower limit protrusions 321 are evenly distributed and extended from the upper end face of the lower column 32. The lower limit protrusions 321 are inserted into the lower part of the honeycomb base plate unit 1 in the middle. The design of the upper limit protrusions 314 and the lower limit protrusions 321 can effectively limit the horizontal displacement of the lower honeycomb base plate unit 1, thereby enhancing the connection strength between the three. Multiple upper column reserved bolt holes 313 are evenly distributed and penetrated through the inner bottom surface of the upper column 31. The upper column reserved bolt holes 313 extend to the lower part of the upper limit protrusions 314. On the end face, the upper end face of the lower limit protrusion 321 is provided with a pre-drilled bolt hole 322 for the lower platform column. Multiple clamping expansion holes 323 are evenly distributed and perforated on the lower end face of the lower platform column 32. The clamping expansion holes 323 are connected to the pre-drilled bolt holes 322 of the lower platform column. A platform connecting screw 324 is provided between the pre-drilled bolt holes 322 of the lower platform column and the pre-drilled bolt holes 313 of the upper platform column. The pre-drilled bolt holes 322 and 313 of the lower platform column serve to allow the platform connecting screw 324 to pass through for connection. The platform connecting screw 324 is inserted into the pre-drilled bolt hole 322 of the lower platform column 32, and then the precast component lower platform column 32 is hoisted to the predetermined position. Next, the honeycomb base plate unit 1 is laid out. According to the design requirements, the precast bottom anchor plate 24 is laid out below the precast rib plate 2. After the honeycomb base plate unit 1 is laid out, the prestressed anchor cable 4 is inserted. By applying prestress and fixing it with anchor clamps 5, a tight connection between the honeycomb base plate units 1 is ensured. Then, the upper column 31 is hoisted and fixed to the lower column 32 with the column connecting screws 324.

[0048] The connector includes a prefabricated bottom anchor plate 24, which has a T-shaped cross-section. The prefabricated bottom anchor plate 24 is located below the prefabricated rib plate 2. The small diameter section of the prefabricated bottom anchor plate 24 is inserted into the lower part of the external honeycomb bottom plate unit 1. This design can effectively limit its horizontal displacement with the honeycomb bottom plate unit 1. The bottom of the prefabricated rib plate 2 has multiple bottom plate reserved holes 23.

[0049] A steel bolt 25 is inserted through the middle of the prefabricated bottom anchor plate 24, passing through the pre-drilled hole 23 in the bottom plate. The prefabricated bottom anchor plate 24 and the steel bolt 25 can fix the prefabricated rib plate 2 and the honeycomb bottom plate unit 1, making the honeycomb bottom plate unit 1 a more stable whole. The end of the steel bolt 25 is tightened with a nut 26. The prefabricated bottom anchor plate 24 is fixed by tightening the steel bolt 25 on the prefabricated bottom anchor plate 24 to connect the honeycomb bottom plate unit 1 into a more stable whole. Then, the remaining prefabricated rib plates 2 are installed in sequence until all prefabricated rib plates 2 are installed. Then, the wind turbine tower is connected to the tower connecting bolt 312, completing the installation of the entire wind turbine foundation structure.

[0050] All of the above key components are prefabricated in a standardized manner in the factory and then transported to the wind farm for on-site assembly.

[0051] A construction method for an expandable honeycomb onshore wind power foundation structure is also provided, including the following steps:

[0052] S1: First, a detailed survey and assessment of the wind farm's foundation is required to determine its bearing capacity and stability. Then, the soil is excavated according to design requirements, and a subbase layer is laid to ensure the flatness and stability of the foundation structure.

[0053] S2: Next, begin installing the lower support column 32. During the installation process, it is necessary to ensure the verticality and positional accuracy of the lower support column 32 to lay the foundation for subsequent installation work.

[0054] S3: Then the honeycomb base plate unit 1 and the precast bottom anchor plate 24 are installed. During the installation process, the honeycomb base plate unit 1 and the precast bottom anchor plate 24 need to be laid in sequence according to the predetermined order, and the honeycomb base plate unit 1 is tightly connected together by the prestressed anchor cable 4.

[0055] S4: Next, install the upper column 31 and the precast rib plate 2. During the installation process, the upper column 31 and the lower column 32 need to be aligned first, and the T-slot 22 on the precast rib plate 2 is inserted into the T-head 315 of the upper column 31 by sliding, and they are tightly connected together by high-strength screws 316.

[0056] S5: Finally, after all components are installed, the steel bolts 25 on the precast bottom anchor plate 24 need to be tightened to ensure the stability of the structure. At the same time, all connections need to be inspected and tightened to ensure the integrity and safety of the structure. In addition, the horizontal and vertical alignment of the structure needs to be tested to ensure it meets design requirements.

[0057] Example 2

[0058] The construction method of this invention is not only applicable to initial installation, but also facilitates future expansion. The expansion includes the following steps:

[0059] S1: First, carry out preparatory work before the expansion, and prepare the necessary expansion components, including new honeycomb base plate unit 1, precast rib plate 2, prestressed anchor cable 4, etc.

[0060] S2: Next, remove the precast rib plate 2 and the prestressed anchor cable 4 in the honeycomb base plate unit 1 at the expansion location;

[0061] S3: Subsequently, according to the expansion design, the new honeycomb base plate unit 1 is installed in sequence. The new honeycomb base plate unit 1 is connected to the old honeycomb base plate unit 1 through the new prestressed anchor cable 4, and appropriate prestress is applied. The old anchor plate clamp 5 is used for clamping.

[0062] S4: Finally, install the new precast rib plate 2, fix it together with the upper column 31 and the new honeycomb base plate unit 1 by high-strength screws 316, and conduct a comprehensive inspection and test on the expanded structure to ensure that it meets the design requirements and safety standards.

[0063] Based on Example 1, the construction method of this invention is equally simple and quick when expansion is required. First, remove the nuts on all the screws on the precast rib plate 2 and pull out the high-strength screw 316. Then, lift the precast rib plate 2 and remove the connecting prestressed anchor cable 4 and anchor cable clamp 5.

[0064] According to the design requirements, the number of honeycomb base plate units 1 and precast base anchor plates 24 was increased to expand the base plate area. New prestressed anchor cables 4 were re-inserted and fixed with the old anchor cable clamps. Then, the new expanded precast rib plate 2 was hoisted to the predetermined position.

[0065] High-strength bolts 316 are used to secure the new prefabricated rib plate 2 and the upper column 31, ensuring a firm connection between them. Next, the steel bolts 25 on the prefabricated bottom anchor plate 24 are tightened to connect the new honeycomb base plate unit 1 into a more stable whole. Then, the remaining expansion prefabricated rib plates 2 are installed sequentially until all expansion prefabricated rib plates 2 are installed. Through the above specific implementation method, the expandable honeycomb onshore wind power foundation structure and its construction and expansion method of the present invention are realized. This invention not only improves the flexibility and scalability of wind power foundation structures but also reduces structural weight and construction costs, shortens the construction cycle, and provides strong support for the rapid construction and future development of wind farms. At the same time, the expansion method of the present invention is simple and easy to implement, and can quickly respond to market demands and technological advancements, providing a strong guarantee for the flexible expansion and upgrading of wind farms.

[0066] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. An expandable honeycomb onshore wind power foundation structure, comprising multiple honeycomb base plate units (1), characterized in that: The honeycomb base plate unit (1) is made of reinforced concrete. Multiple honeycomb base plate units (1) are arranged in a honeycomb pattern. The opposite faces of two adjacent honeycomb base plate units (1) are respectively provided with mortises (11) and tenons (12). The mortises (11) and tenons (12) are interlocked. Multiple honeycomb base plate units (1) are woven together by prestressed anchor cables (4) and anchor cable clamps (5). The multiple honeycomb base plate units (1) located in the middle are provided with prefabricated column elements (3). Multiple prefabricated ribs (2) are evenly distributed on the outer side of the prefabricated column elements (3). Connectors are provided between the prefabricated ribs (2) and the honeycomb base plate units (1).

2. The expandable honeycomb onshore wind power foundation structure according to claim 1, characterized in that: The outer surface of the honeycomb base plate unit (1) is provided with a connecting anchor cable hole (13), and the prestressed anchor cable (4) passes through the connecting anchor cable hole (13).

3. The expandable honeycomb onshore wind power foundation structure according to claim 2, characterized in that: The prefabricated column element (3) includes an upper column (31) and a lower column (32). The upper column (31) and the lower column (32) are respectively attached to the upper and lower ends of multiple honeycomb base plate units (1) in the middle. One end of the prefabricated rib plate (2) is attached to the outer surface of the upper column (31). The cross section of one end of the prefabricated rib plate (2) is larger than the cross section of the other end. A T-shaped groove (22) is provided at the lower part of one end of the prefabricated rib plate (2). The upper column (31) is made of reinforced concrete. The shape of the upper column (31) is a regular hexagon. A T-shaped head (315) is provided at the lower part of the outer surface of the upper column (31). The T-shaped head (315) is inserted into the T-shaped groove (22). A tower connecting bolt (312) extends from the upper end face of the upper column (31).

4. The expandable honeycomb onshore wind power foundation structure according to claim 3, characterized in that: A bolt hole (21) is provided through the upper part of one end of the precast rib (2), and a reserved screw hole (311) is provided through the upper part of the outer surface of the upper column (31). A high-strength screw (316) is provided through the bolt hole (21) and the reserved screw hole (311).

5. The expandable honeycomb onshore wind power foundation structure according to claim 4, characterized in that: The lower end face of the upper column (31) is evenly distributed with multiple upper limit protrusions (314), which are inserted into the upper part of the honeycomb base plate unit (1) in the middle. The upper end face of the lower column (32) is evenly distributed with multiple lower limit protrusions (321), which are inserted into the lower part of the honeycomb base plate unit (1) in the middle. The inner bottom surface of the upper column (31) is evenly distributed with multiple upper column reserved bolt holes (313). The bolt hole (313) extends to the lower end face of the upper limit protrusion (314). The upper end face of the lower limit protrusion (321) is provided with a lower column reserved bolt hole (322). The lower end face of the lower column (32) is provided with a plurality of clamp enlarged holes (323) evenly distributed through it. The clamp enlarged holes (323) are connected to the lower column reserved bolt hole (322). A column connecting screw (324) is provided through between the lower column reserved bolt hole (322) and the upper column reserved bolt hole (313).

6. The expandable honeycomb onshore wind power foundation structure according to claim 5, characterized in that: The connector includes a prefabricated bottom anchor plate (24), the prefabricated bottom anchor plate (24) has a T-shaped cross section, the prefabricated bottom anchor plate (24) is located below the prefabricated rib plate (2), the small diameter section of the prefabricated bottom anchor plate (24) is inserted into the lower part of the external honeycomb bottom plate unit (1), and the bottom of the prefabricated rib plate (2) is provided with multiple bottom plate reserved holes (23).

7. The expandable honeycomb onshore wind power foundation structure according to claim 6, characterized in that: A steel bolt (25) is provided through the middle of the precast bottom anchor plate (24). The steel bolt (25) passes through the reserved hole (23) in the bottom plate, and a nut (26) is screwed onto the end of the steel bolt (25).

8. A construction method for an expandable honeycomb onshore wind power foundation structure, applied to the expandable honeycomb onshore wind power foundation structure described in claim 7, characterized in that, Includes the following steps: S1: First, a detailed survey and assessment of the wind farm's foundation is required to determine its bearing capacity and stability. Then, the soil is excavated according to design requirements, and a subbase layer is laid to ensure the flatness and stability of the foundation structure. S2: Next, the lower column (32) will be installed. During the installation process, the verticality and positional accuracy of the lower column (32) must be ensured to lay the foundation for subsequent installation work. S3: Then the honeycomb base plate unit (1) and the precast bottom anchor plate (24) are installed. During the installation process, the honeycomb base plate unit (1) and the precast bottom anchor plate (24) are laid in sequence according to the predetermined order, and the honeycomb base plate unit (1) is tightly connected together by the prestressed anchor cable (4). S4: Next, install the upper column (31) and the precast rib plate (2). During the installation process, the upper column (31) and the lower column (32) need to be aligned first, and the T-slot (22) on the precast rib plate (2) is inserted into the T-head (315) of the upper column (31) by sliding, and they are tightly connected together by high-strength screws (316). S5: Finally, after all components are installed, the steel bolts (25) on the precast bottom anchor plate (24) need to be tightened to ensure the stability of the structure. At the same time, all connections need to be inspected and tightened to ensure the integrity and safety of the structure. In addition, the horizontality and verticality of the structure need to be tested to ensure that it meets the design requirements.

9. The construction method of an expandable honeycomb onshore wind power foundation structure according to claim 8, characterized in that, It also includes the following steps: S1: First, carry out preparatory work before the expansion, and prepare the required expansion components, including new honeycomb base plate unit (1), precast rib plate (2), prestressed anchor cable (4), etc. S2: Next, remove the precast rib plate (2) and the prestressed anchor cable (4) in the honeycomb base plate unit (1) at the expansion location. S3: Subsequently, according to the expansion design, new honeycomb base plate units (1) are installed in sequence. The new honeycomb base plate units (1) are connected to the old honeycomb base plate units (1) through new prestressed anchor cables (4), and appropriate prestress is applied. The old anchor plate clamps (5) are used for clamping. S4: Finally, install the new precast rib (2), fix it together with the upper column (31) and the new honeycomb base plate unit (1) by high-strength screws (316), and conduct a comprehensive inspection and test on the expanded structure to ensure that it meets the design requirements and safety standards.

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