A steel-concrete prefabricated body structure of a wind turbine tower and a manufacturing method thereof

Abstract

A kind of steel-mix precast body structure of wind turbine tower and its manufacturing method, the surface of precast brick body is formed with mortise and tenon component, the tower body is formed after the circular row of several precast brick bodies is stacked upwards through mortise and tenon component;The specified position of each precast brick body is provided with through hole;Tower body is inserted with expansion steel bar from top to bottom through the through hole on precast brick body;The outer side of each precast brick body is connected with an extension plate;After precast brick body is stacked to form tower body, extension plate forms Archimedes spiral on the outer wall of tower body.Wherein, the brick length, brick height and rising angle of precast brick body are calculated;The position of through hole on precast brick body is calculated;According to the rising angle, brick length, brick height and through hole position of calculated precast brick body, precast brick body factory processing is carried out.The precast body of the application is smaller, has the characteristics of easy production, maintenance-free, high strength and convenient transportation, effectively prevents the shaking problem of tower.

Description

Technical Field

[0001] This invention belongs to the field of wind turbine technology, specifically relating to a precast steel-concrete structure for a wind turbine tower and its manufacturing method. Background Technology

[0002] With the rapid development of the wind power industry, it has become an important pillar in the field of new energy power generation and an important means of achieving emission reduction power generation.

[0003] Existing wind turbine towers mostly use a structural steel-flange connection method for segmented installation. This method consumes a large amount of steel, resulting in high overall costs. Furthermore, the prefabricated tower sections produced in factories are relatively long, making them difficult to transport in complex terrains such as high-altitude wind farms. Additionally, current wind turbine sway reduction primarily relies on dampers, which increases the turbine's weight. The large mass of the damper also makes transportation and hoisting difficult. Moreover, for small wind turbines, the limited space within the tower itself makes it difficult to install dampers. Furthermore, the smooth tower surface, under the influence of external wind fields, forms Karman vortex streets, causing tower swaying and vibration, affecting turbine operation, increasing the difficulty of nacelle maintenance, potentially leading to blade sweeping, and reducing operational safety. Summary of the Invention

[0004] Therefore, the present invention provides a steel-concrete precast structure for wind turbine towers and its manufacturing method, which solves the problems of inconvenient transportation and installation, easy shaking and vibration, and affecting the safe operation of wind turbines in traditional technologies.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a steel-concrete precast structure for a wind turbine tower, comprising precast bricks, wherein mortise and tenon joints are formed on the surface of the precast bricks, and a plurality of the precast bricks are arranged circumferentially and stacked upwards through the mortise and tenon joints to form the tower body.

[0006] Each of the precast bricks has a through hole at a designated position; the tower body is reinforced with expansion joints inserted through the through holes on the precast bricks from top to bottom;

[0007] Each of the precast bricks is connected to an extension plate on its outer side; after the precast bricks are stacked to form the tower body, the extension plate forms an Archimedean spiral on the outer wall of the tower body.

[0008] As a preferred embodiment of the steel-concrete precast structure for wind turbine towers, the tenon and mortise components include a top male tenon, a bottom female tenon, a side male tenon, and a side female tenon; the top male tenon is formed on the upper surface of the precast brick body; the bottom female tenon is formed on the lower surface of the precast brick body; the side male tenon is formed on one side of the precast brick body, and the side female tenon is formed on the other side of the precast brick body;

[0009] The upper and lower surfaces of two adjacent precast bricks are connected by the top male mortise and the bottom female mortise; the sides of two adjacent precast bricks are connected by the side male mortise and the side female mortise.

[0010] As a preferred embodiment of the precast steel-concrete structure for wind turbine towers, the inner wall of the precast brick body is a first arc-shaped surface, and the outer wall of the precast brick body is a second arc-shaped surface.

[0011] As a preferred embodiment of the precast steel-concrete structure for wind turbine towers, the upper end of the expansion joint is connected to a top nut, and the lower end of the expansion joint is connected to a bottom nut.

[0012] This invention also provides a method for manufacturing a precast steel-concrete structure for a wind turbine tower, comprising the following steps:

[0013] S1. Calculate the brick length, brick height, and rise angle of the precast brick body;

[0014] S2. Calculate the location of through holes on the precast bricks;

[0015] S3. Based on the calculated rise angle, brick length, brick height, and through hole position of the precast brick, the precast brick is processed in the factory.

[0016] S4. Precast brick body mold opening, to obtain brick mold;

[0017] S5. Pour concrete into the brick mold and process and adjust the mortise and tenon components of the obtained precast bricks.

[0018] S6. Make through holes in the precast bricks after processing and adjusting the mortise and tenon components, and number the precast bricks.

[0019] S7. Pack the numbered precast bricks and transport them to the installation area;

[0020] S8. Stack and assemble the transported precast bricks according to the precast brick numbering logic;

[0021] S9. Insert expansion steel bars into the through holes of the stacked precast bricks.

[0022] As a preferred method for manufacturing precast steel-concrete structures for wind turbine towers, the brick length of the precast bricks is determined as follows:

[0023] When x > 24

[0024] When 22 < x ≤ 24

[0025] When 20 < x ≤ 22

[0026] When x = 20m

[0027] When x = 19

[0028] When x≤18

[0029] In the formula, x is the number of precast bricks in a single layer design; [l] is the maximum allowable brick length; and d is the outer diameter of the tower designed at the plane where the center of gravity of the precast bricks is located.

[0030] As a preferred method for manufacturing precast steel-concrete structures for wind turbine towers, the brick height of the precast bricks is determined as follows:

[0031] When h t When <10, h≥0.04h t ;

[0032] When 10≤h t When <22.5, h≥0.052h t ;

[0033] When 22.5≤h t When <31, h≥0.06h t ;

[0034] When 31≤h t When <40.8, h≥0.07h t ;

[0035] When 40.8≤h t When <50, h≥0.0761h t ;

[0036] When 50≤h t When <59.2, h≥0.0824h t ;

[0037] When 59.2≤h t When <60, h8 ≥ 0.0824h t ;

[0038] When 60≤h t <72, h 10 ≥0.0833h t ;

[0039] When 72≤h t <86, h 14 ≥0.0848h t ;

[0040] When 86≤ht When <102, h 18 ≥0.0852h t ;

[0041] In the formula, h t h is the design height of the tower body; h is the height of the precast bricks; h8 is the height requirement of the 8 precast bricks near the ground; h 10 The height requirement for 10 precast bricks near the ground; h 14 The height requirement for the 14 precast bricks near the ground; h 18 The height requirement for the 18 precast bricks near the ground.

[0042] As a preferred method for manufacturing precast steel-concrete structures for wind turbine towers, the method for determining the rise angle of the precast bricks is as follows:

[0043] When h t When <48, [β] = 30;

[0044] When 48≤h t When <72, [β] = 26.5;

[0045] When 72≤h t When <86, [β] = 20.125;

[0046] When 86≤h t When <88, [β] = 12.343;

[0047] When 88≤h t When <90, [β] = 10.664;

[0048] When h t When β > 90, [β] = 10.169;

[0049] In the formula, [β] is the maximum allowable ascent angle.

[0050] As a preferred method for manufacturing precast steel-concrete structures for wind turbine towers, the method for determining the through holes in the precast bricks is as follows:

[0051] d=ξ2-ξ1

[0052] ξ1=(x p (l-1)+ξ ini,1 )·(1+0.00318p)

[0053] ξ2=(x p (l-1)+ξ ini,2 )·(1+0.00318p)

[0054]

[0055] In the formula, d is the perforation spacing; x p ξ represents the number of precast bricks in the current layer; ξ1 represents the distance between the first through hole and the left side; ξ2 represents the distance between the second through hole and the left side; ξ ini,1 ξ is the initial left distance of the first through hole; ini,2 is the initial left distance of the second through hole; p is the layer number of the precast brick.

[0056] The preferred method for manufacturing precast steel-concrete structures for wind turbine towers also includes the following steps:

[0057] S10. Install the wind turbine generator nacelle on the top of the installed tower body;

[0058] S11. Calculate the annual average yaw direction of the wind turbine nacelle based on the wind direction, and calculate the tension of the expansion steel bars.

[0059] The present invention has the following advantages: the surface of the precast bricks is formed with tenon and mortise components, and several precast bricks are arranged circumferentially and stacked upwards through the tenon and mortise components to form the tower body; a through hole is provided at a designated position of each precast brick; expansion steel bars are inserted through the through holes on the precast bricks from top to bottom in the tower body; an extension plate is connected to the outside of each precast brick; after the precast bricks are stacked to form the tower body, the extension plate forms an Archimedean spiral on the outer wall of the tower body. The process involves calculating the length, height, and rise angle of the precast bricks; calculating the positions of the through holes on the precast bricks; processing the precast bricks in a factory based on the calculated rise angle, length, height, and through hole positions; creating a mold for the precast bricks; pouring concrete into the mold; adjusting the mortise and tenon joints of the resulting precast bricks; drilling through holes in the adjusted precast bricks and numbering them; packaging and transporting the numbered precast bricks to the installation area; stacking and assembling the transported precast bricks according to their numbering logic; and inserting expansion joints into the through holes of the stacked precast bricks. This invention produces small precast bricks that are easy to manufacture, maintenance-free, high-strength, and easy to transport. By altering the surface roughness of the wind turbine tower, it reduces the generation and intensity of Karman vortex streets from the source, effectively preventing tower swaying. Attached Figure Description

[0060] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0061] Figure 1 This is a three-dimensional schematic diagram of the precast steel-concrete structure of the wind turbine tower provided in an embodiment of the present invention;

[0062] Figure 2 This is a schematic diagram of the Archimedean spiral formed on the outer wall of the tower body in the precast steel-concrete structure of the wind turbine tower provided in the embodiment of the present invention.

[0063] Figure 3 This is a schematic diagram of the expansion joint reinforcement in the precast steel-concrete structure of the wind turbine tower provided in this embodiment of the invention;

[0064] Figure 4 This is a schematic diagram of the precast bricks in the steel-concrete precast structure of the wind turbine tower provided in this embodiment of the invention;

[0065] Figure 5 This is a schematic diagram of the precast brick body parameters in the steel-concrete precast body of the wind turbine generator tower provided in this embodiment of the invention;

[0066] Figure 6 This is a flowchart illustrating the method for manufacturing a precast steel-concrete structure for a wind turbine tower, as provided in an embodiment of the present invention.

[0067] In the diagram, 1. Precast brick body; 2. Tower body; 3. Through hole; 4. Tensioner reinforcement; 5. Outer plate; 6. Archimedes spiral; 7. Top male mortise; 8. Bottom female mortise; 9. Side male mortise; 10. Side female mortise; 11. First arc surface; 12. Second arc surface; 13. Top nut; 14. Bottom nut. Detailed Implementation

[0068] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0069] Example 1

[0070] See Figure 1 , Figure 2 , Figure 3 and Figure 4 Embodiment 1 of the present invention provides a steel-concrete prefabricated structure for a wind turbine tower, including a prefabricated brick body 1, the surface of the prefabricated brick body 1 having tenon and mortise members formed thereon, and several prefabricated brick bodies 1 are arranged circumferentially and stacked upwards through the tenon and mortise members to form a tower body 2.

[0071] Each precast brick 1 has a through hole 3 at a designated position; the tower body 2 has expansion steel bars 4 inserted from top to bottom through the through holes 3 on the precast brick 1.

[0072] Each precast brick 1 has an extension plate 5 connected to its outer side; after the precast bricks 1 are stacked to form the tower body 2, the extension plate 5 forms an Archimedean spiral 6 on the outer wall of the tower body 2.

[0073] In this embodiment, the tenon and mortise joint includes a top male mortise 7, a bottom female mortise 8, a side male mortise 9, and a side female mortise 10; the top male mortise 7 is formed on the upper surface of the precast brick 1; the bottom female mortise 8 is formed on the lower surface of the precast brick 1; the side male mortise 9 is formed on one side of the precast brick 1, and the side female mortise 10 is formed on the other side of the precast brick 1; the upper and lower surfaces of two adjacent precast bricks 1 are connected by the top male mortise 7 and the bottom female mortise 8; the sides of two adjacent precast bricks 1 are connected by the side male mortise 9 and the side female mortise 10.

[0074] In this embodiment, the precast brick body 1 is a split type, which is small in size, light in weight, and has high structural strength. It is easy to produce, maintenance-free, high in strength, and easy to transport. The shape of the precast brick body 1 itself is twisted in the diagonal direction. During the installation process, the precast brick body 1 will gradually accumulate upward to form a circular tower body 2.

[0075] In this embodiment, the inner wall of the precast brick 1 is a first arc-shaped surface 11, and the outer wall of the precast brick 1 is a second arc-shaped surface 12. Simultaneously, an extension plate 5 of a certain length is provided on the top of the precast brick 1. The extension plate 5 on the spirally rising precast brick 1 eventually forms an Archimedean spiral 6, changing the surface roughness of the tower body 2. This transforms the tower body 2 from a smooth cylindrical surface into a rough, turbulent column, effectively preventing or mitigating the Karman vortex street phenomenon and weakening the impact of boundary layer separation and wake vortex on the tower vibration of the wind turbine.

[0076] In this embodiment, the upper end of the expansion joint 4 is connected to a top nut 13, and the lower end of the expansion joint 4 is connected to a bottom nut 14. The precast brick body 1 has a through hole 3 inside. During the assembly process, the through expansion joint 4 is inserted into the through hole 3 to ensure the rigidity of the overall structure.

[0077] Example 2

[0078] See Figure 5 and Figure 6 Embodiment 2 of the present invention provides a method for manufacturing a precast steel-concrete structure for a wind turbine tower, used in the precast steel-concrete structure of the wind turbine tower of Embodiment 1, comprising the following steps:

[0079] S1. Calculate the brick length, brick height, and rise angle of precast brick body 1;

[0080] S2. Calculate the position of the through hole 3 on the precast brick 1;

[0081] S3. Based on the calculated rise angle, brick length, brick height and the position of the through hole 3 of the precast brick body 1, the precast brick body 1 is processed in the factory.

[0082] S4. Precast brick body 1 is molded to obtain brick mold;

[0083] S5. Pour concrete into the brick mold and process and adjust the mortise and tenon components of the obtained precast brick 1.

[0084] S6. Make through holes 3 in the precast brick body 1 after processing and adjusting the mortise and tenon components, and number the precast brick body 1.

[0085] S7. Pack the numbered precast bricks 1 and transport them to the installation area;

[0086] S8. Stack and assemble the transported precast bricks 1 according to the numbering logic of precast bricks 1;

[0087] S9. Insert expansion steel bars 4 into the through holes 3 of the stacked precast bricks 1.

[0088] In this embodiment, in step S1, according to the pre-set structural requirements of the prefabricated steel-concrete tower body 2, and according to the calculation and allowable requirements of the brick length, brick height and rise angle of the prefabricated brick body 1, the corresponding values ​​of the brick length, brick height and rise angle are calculated, and each value is required to be no greater than the calculated allowable range.

[0089] Specifically, the method for determining the brick length of the precast brick body 1 is as follows:

[0090] When x > 24

[0091] When 22 < x ≤ 24

[0092] When 20 < x ≤ 22

[0093] When x = 20m

[0094] When x = 19

[0095] When x≤18

[0096] In the formula, x is the number of precast bricks 1 in a single-layer design; [l] is the maximum allowable brick length; and d is the outer diameter of the tower designed at the plane where the center of gravity of the precast brick 1 is located.

[0097] Specifically, the method for determining the height of the precast brick body 1 is as follows:

[0098] When h t When <10, h≥0.04h t ;

[0099] When 10≤h t When <22.5, h≥0.052h t ;

[0100] When 22.5≤h t When <31, h≥0.06h t ;

[0101] When 31≤h t When <40.8, h≥0.07h t ;

[0102] When 40.8≤h t When <50, h≥0.0761h t ;

[0103] When 50≤h t When <59.2, h≥0.0824h t ;

[0104] When 59.2≤h t When <60, h8 ≥ 0.0824h t ;

[0105] When 60≤h t <72, h 10 ≥0.0833h t ;

[0106] When 72≤h t <86, h 14 ≥0.0848h t ;

[0107] When 86≤h t When <102, h 18 ≥0.0852h t ;

[0108] In the formula, h t h is the design height of the tower body 2; h is the height of the precast brick body 1; h8 is the height requirement of the 8 precast brick bodies 1 near the ground; h 10 The height requirement for 10 precast bricks near the ground; h 14 The height requirement for the 14 precast bricks near the ground; h 18 The height requirement for the 18 precast bricks near the ground.

[0109] Specifically, the method for determining the ascent angle of the precast brick body 1 is as follows:

[0110] When h t When <48, [β] = 30;

[0111] When 48≤h t When <72, [β] = 26.5;

[0112] When 72≤h t When <86, [β] = 20.125;

[0113] When 86≤h t When <88, [β] = 12.343;

[0114] When 88≤h t When <90, [β] = 10.664;

[0115] When h t When β > 90, [β] = 10.169;

[0116] In the formula, [β] is the maximum allowable ascent angle.

[0117] In this embodiment, in step S2, based on the calculated values ​​of brick length l, brick height h, and rise angle β, the positioning dimensions of the through holes 3 of the precast brick body 1 are calculated according to the spacing d of the through holes 3 and the calculation and allowable requirements of the positioning dimensions of the through holes 3, so as to ensure that the form and position tolerances are appropriate to adapt to the subsequent assembly work.

[0118] Specifically, the method for determining the through hole 3 of the precast brick body 1 is as follows:

[0119] d=ξ2-ξ1

[0120] ξ1=(x p (l-1)+ξ ini,1 )·(1+0.00318p)

[0121] ξ2=(x p (l-1)+ξ ini,2 )·(1+0.00318p)

[0122]

[0123] In the formula, d is the perforation spacing; x p ξ1 represents the number of precast bricks 1 in the current layer; ξ2 represents the distance between the first through hole 3 and the left side; ξ3 represents the distance between the second through hole 3 and the left side; ξ4 represents the distance between the first through hole 3 and the left side. ini,1 The initial left distance of the first through hole 3; ξ ini,2 p represents the initial left distance of the second through hole 3; p represents the layer number of the precast brick 1.

[0124] In this embodiment, after the above calculations in step S3, the relevant parameters of the entire precast brick body 1 have been determined. The factory needs to process the precast brick body 1 according to the corresponding values ​​of the brick length l, brick height h, rise angle β, through hole spacing d, and through hole positioning size of the precast brick body 1.

[0125] In this embodiment, in step S4, the precast brick body 1 is composed of an assembled steel-concrete structure. The concrete structure requires precast molding molds, and the mold size needs to be determined according to the above calculation results. It should be emphasized that a precast steel-concrete structure tower body 2 requires several or even dozens of concrete molds to accommodate the brick arrangement size at different heights.

[0126] In this embodiment, after the concrete bricks are poured and demolded by the mold in step S5, the tenon and mortise parts after demolding need to be finely processed to adapt to the arrangement of precast bricks 1 at different heights. The overall shape and position tolerances are required to be appropriate, and the frame movement gap of the tenon and mortise contact should not be greater than 1.25mm.

[0127] In this embodiment, in step S6, according to the corresponding values ​​of the spacing d of the through holes 3 and the positioning size of the through holes 3, through holes 3 are drilled in the precast concrete brick 1. It is required that the diameter of the through holes 3 be uniform and stable, and there should be no cracks, concrete spalling, or wear exceeding 7% of the hole diameter at the drilling location of the precast brick 1. If the above situations occur, the precast brick 1 needs to be remade and the through holes 3 need to be drilled again. The precast brick 1 after drilling the through holes 3 is labeled according to the manufacturing size and the relevant size of the through holes 3. It is required to clearly mark the layer number and position number of the precast brick 1, i.e., XY, where X represents the layer number of the precast brick 1 and Y represents the position number of the precast brick 1 under that layer.

[0128] In this embodiment, in step S7, the precast bricks 1 processed in the above steps are packaged and transported. The number of layers of precast bricks 1 stacked should not exceed 5. After the precast bricks 1 are transported to the vicinity of the tower installation area, assembly operations are carried out. In step S8, the transported precast bricks 1 are stacked and assembled according to the numbering logic of the precast bricks 1. Then, in step S9, the stacked precast bricks 1 are threaded with expansion joints 4 through the through holes 3, and a certain prestress is applied to ensure that the tower body 2 will not disintegrate or collapse during subsequent installation.

[0129] This embodiment also includes the following steps:

[0130] S10. Install the wind turbine nacelle on the top of the installed tower body 2; then in step S11, calculate the annual average yaw direction of the wind turbine nacelle according to the wind direction, and calculate the tension of the expansion steel bar 4.

[0131] Specifically, in step S11, the annual average yaw direction of the wind turbine is calculated based on the annual average wind direction. The tension of the array of expansion steel bars 4 in this direction needs to be increased to improve the prestress and prevent the tower body 2 from collapsing backward. At the same time, the tension of the array of expansion steel bars 4 in the opposite direction needs to be adjusted (reduced) appropriately to prevent the tower body 2 from collapsing due to excessive tension.

[0132] Subsequently, after the above steps, the installation is completed, the wind turbine is operating normally, and the tower structure of the prefabricated steel-concrete structure is inspected and maintained at appropriate times.

[0133] In summary, the surface of the precast brick body 1 of the present invention is formed with mortise and tenon components. Several precast brick bodies 1 are arranged circumferentially and stacked upwards through the mortise and tenon components to form a tower body 2. A through hole 3 is provided at a designated position of each precast brick body 1. Expansion bars 4 are inserted through the through holes 3 on the precast brick body 1 from top to bottom in the tower body 2. An extension plate 5 is connected to the outer side of each precast brick body 1. After the precast brick bodies 1 are stacked to form the tower body 2, the extension plate 5 forms an Archimedean spiral 6 on the outer wall of the tower body 2. The process involves calculating the length, height, and rise angle of the precast brick 1; calculating the position of the through hole 3 on the precast brick 1; processing the precast brick 1 in the factory based on the calculated rise angle, length, height, and position of the through hole 3; opening a mold for the precast brick 1 to obtain a brick mold; pouring concrete into the brick mold; processing and adjusting the mortise and tenon joints of the obtained precast brick 1; drilling the through hole 3 in the precast brick 1 after processing and adjusting the mortise and tenon joints; numbering the precast brick 1; packaging and transporting the numbered precast brick 1 to the installation area; stacking and assembling the transported precast brick 1 according to the numbering logic; and inserting expansion steel bars 4 into the through holes 3 of the stacked precast brick 1. The prefabricated body of this invention is small and has the characteristics of easy production, maintenance-free, high strength and easy transportation. By changing the surface roughness of the wind turbine tower, the generation of Karman vortex street and vortex intensity are reduced from the source, effectively preventing the tower swaying problem.

[0134] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A method for manufacturing a precast steel-concrete structure for a wind turbine tower, the precast steel-concrete structure comprising precast bricks (1), the surface of which is formed with tenon and mortise members, several precast bricks (1) being arranged circumferentially and stacked upwards through the tenon and mortise members to form a tower body (2); each precast brick (1) having a through hole (3) at a designated position; the tower body (2) having expansion joints (4) inserted from top to bottom through the through holes (3) on the precast bricks (1); each precast brick (1) having an extension plate (5) connected to its outer side; after the precast bricks (1) are stacked to form the tower body (2), the extension plate (5) forms an Archimedean spiral (6) on the outer wall of the tower body (2), characterized in that, The method for fabricating precast reinforced concrete structures includes the following steps: S1. Calculate the brick length, brick height and rise angle of the precast brick body (1); S2. Calculate the position of the through hole (3) on the precast brick (1); S3. Based on the calculated rise angle, brick length, brick height and through hole (3) position of the precast brick body (1), the precast brick body (1) is processed in the factory. S4. Precast brick body (1) Open the mold to obtain the brick body mold; S5. Pour concrete into the brick mold and process and adjust the mortise and tenon components of the obtained precast brick (1). S6. Make through holes (3) in the precast brick body (1) after processing and adjusting the mortise and tenon components, and number the precast brick body (1); S7. Pack the numbered precast bricks (1) and transport them to the installation area; S8. Stack and assemble the transported precast bricks (1) according to the numbering logic of the precast bricks (1); S9. Insert expansion steel bars (4) into the through holes (3) of the stacked precast bricks (1).

2. The method for manufacturing a precast steel-concrete structure for a wind turbine tower according to claim 1, characterized in that, The method for determining the brick length of the precast brick body (1) is as follows: When x > 24 ; When 22 < x ≤ 24 ; When 20 < x ≤ 22 ; When x=20, ; When x=19 ; When x≤18 ; In the formula, x is the number of precast bricks (1) in a single-layer design; d is the maximum allowable brick length; d is the outer diameter of the tower designed at the plane where the center of gravity of the precast brick (1) is located.

3. The method for manufacturing a precast steel-concrete structure for a wind turbine tower according to claim 1, characterized in that, The tenon and mortise joint includes a top male tenon (7), a bottom female tenon (8), a side male tenon (9), and a side female tenon (10); the top male tenon (7) is formed on the upper surface of the precast brick body (1); the bottom female tenon (8) is formed on the lower surface of the precast brick body (1); the side male tenon (9) is formed on one side of the precast brick body (1), and the side female tenon (10) is formed on the other side of the precast brick body (1); The upper and lower surfaces of two adjacent precast brick bodies (1) are connected by the top male mortise (7) and the bottom female mortise (8); the sides of two adjacent precast brick bodies (1) are connected by the side male mortise (9) and the side female mortise (10).

4. The method for manufacturing a precast steel-concrete structure for a wind turbine tower according to claim 1, characterized in that, The inner wall of the precast brick body (1) is a first arc-shaped surface (11), and the outer wall of the precast brick body (1) is a second arc-shaped surface (12).

5. The method for manufacturing a precast steel-concrete structure for a wind turbine tower according to claim 1, characterized in that, The upper end of the expansion bar (4) is connected to a top nut (13), and the lower end of the expansion bar (4) is connected to a bottom nut (14).

6. The method for manufacturing a precast steel-concrete structure for a wind turbine tower according to claim 1, characterized in that, It also includes the following steps: S10. Install the wind turbine nacelle on the top of the installed tower body (2); S11. Calculate the annual average yaw direction of the wind turbine nacelle based on the wind direction, and calculate the tension of the expansion steel bar (4).

Images