FRP (Fiber Reinforced Plastic)-concrete-steel combined tower drum of mixed tower wind turbine generator and construction method of FRP-concrete-steel combined tower drum

Abstract

The invention discloses a mixed tower wind turbine generator FRP-concrete-steel combined tower drum and a construction method.The tower drum comprises a steel tower section and a mixed tower section, the steel tower section is installed on the upper portion of the mixed tower section, the mixed tower section is composed of a plurality of tower drum sections which are sequentially connected from top to bottom, and each tower drum section is formed by combining a plurality of arc-shaped tower drum ring pieces in a surrounding mode; the tower drum ring pieces in the same tower drum section are fixedly connected, vertical joints between the vertically adjacent tower drum sections are installed in a staggered mode, and each tower drum ring piece comprises a reinforced concrete main body part, an inner steel pipe part and a CFRP cloth wrapping section arranged on the outer side of the reinforced concrete main body part. And the reinforced concrete main body parts and the inner steel pipe parts of the upper and lower adjacent tower drum sections are respectively connected, so that the adjacent tower drum sections are mutually fixed. The compressive strength and ductility of the wind power tower cylinder concrete can be improved, larger deformation is generated before the structure is damaged, more energy is absorbed, brittle failure is avoided, complex steel bar configuration is avoided, and the construction difficulty is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power towers and relates to an FRP-concrete-steel combined tower of a mixed-tower wind turbine set and a construction method. Background Art

[0002] Traditional wind turbine hybrid towers, or concrete-steel hybrid towers, consist of a lower concrete section, an upper steel section, and a transition section between the two. The concrete sections are typically joined with prefabricated segments and prestressed to enhance overall strength. Hybrid towers offer advantages such as greater rigidity, stability, and cost-effectiveness. However, traditional wind turbine towers have shortcomings in durability and quality control. Concrete towers require complex reinforcement arrangements, making construction difficult and quality defects difficult to control. Epoxy adhesive is currently commonly used to bond the horizontal and vertical joints in the hybrid tower sections. This adhesive has strict environmental requirements, complex application, and slow curing. It also suffers from incomplete filling, debonding, and difficulty in handling excess adhesive. Durability is poor, with fatigue easily occurring under cyclic loading and degradation in the natural environment. Inspection and maintenance are challenging, and internal defects are difficult to identify. Repair requires specialized equipment and technology, resulting in high costs. As the wind power industry expands into harsh environments such as deep sea and high altitude, tower performance requirements are becoming increasingly demanding, creating an urgent need for a new type of tower to meet these demands. Summary of the Invention

[0003] This invention aims to address the issues mentioned in the background art by proposing a hybrid wind turbine tower structure with FRP, concrete, and steel, and its construction method. By leveraging the properties of CFRP sheets, steel pipes, and UHPC materials, the tower's durability is improved, quality defects are reduced, and complex reinforcement configurations are avoided.

[0004] In order to achieve the above technical objectives, the technical solution adopted by the present invention is:

[0005] The FRP-concrete-steel combined tower of the hybrid tower wind turbine includes a steel tower section and a hybrid tower section. The steel tower section is installed on the upper part of the hybrid tower section. Its characteristics are: the hybrid tower section is composed of multiple tower segments connected in sequence up and down, each tower segment is composed of a plurality of arc-shaped tower ring segments surrounded by a combination, the tower ring segments in the same tower segment are fixedly connected, vertical seams are formed between the tower ring segments, and the vertical seams between the upper and lower adjacent tower segments are staggered. The tower ring segments include a reinforced concrete main part, an inner steel pipe part arranged on the inner side of the reinforced concrete main part, and a CFRP cloth wrapped section arranged on the outer side of the reinforced concrete main part. The reinforced concrete main parts and the inner steel pipe parts of the upper and lower adjacent tower segments are connected respectively, so that the adjacent tower segments are fixed to each other.

[0006] To optimize the above technical solutions, specific measures taken also include:

[0007] The above-mentioned reinforced concrete main part includes a concrete layer, longitudinal steel bars and stirrups. The longitudinal steel bars and stirrups are arranged in the concrete layer. Teeth and tooth grooves are respectively provided at both ends of the reinforced concrete main part. The teeth and tooth grooves are respectively provided with penetrating reserved bolt holes. In a tower segment, the teeth of a tower ring segment can be inserted into the tooth grooves of the adjacent tower ring segment, and the reserved bolt holes of the teeth and tooth grooves are just aligned. The through bolts pass through the reserved bolt holes to fix the two tower ring segments to each other.

[0008] The above-mentioned inner steel pipe part includes arc-shaped steel pipe segments and bolts. The arc-shaped steel pipe segments are fixed to the inner side of the concrete layer by bolts. In a tower segment, the end of the arc-shaped steel pipe segment of a tower ring segment is welded and fixed to the end of the arc-shaped steel pipe segment of the adjacent tower ring segment.

[0009] The aforementioned longitudinal steel bars, stirrups and arc-shaped steel pipe segments all extend upward or downward to the upper or lower end of the tower ring segments, and the upper and lower adjacent tower segments are fixedly connected by connecting components.

[0010] The above-mentioned connection components include a connecting sleeve, an inner lining pipe and a post-cast concrete belt. The longitudinal steel bars are fixedly connected by the connecting sleeve, the arc-shaped steel pipe segments are welded together by V-groove welding, and then the inner lining pipe is welded on the inner side of the connection of the arc-shaped steel pipe segments. Concrete is poured between the upper and lower adjacent tower segments. The concrete buries the longitudinal steel bars, stirrups and connecting sleeves to form a post-cast concrete belt.

[0011] The above-mentioned inner steel pipe part also includes a number of steering blocks, each of which is provided with a hole that passes through the upper and lower parts. The steering blocks are welded to the inner side of the arc-shaped steel pipe segment. The steering blocks of the upper and lower adjacent tower segments are aligned up and down. The prestressed tendons pass through the steering blocks vertically and tension the prestress.

[0012] The material used for the above-mentioned post-cast concrete belt is UHPC.

[0013] Each tower segment is composed of five arc-shaped tower ring segments, and the vertical joints between the upper and lower adjacent tower segments are installed with a 36° staggered joint.

[0014] The construction method of the FRP-concrete-steel composite tower of the hybrid tower wind turbine generator set is used for the FRP-concrete-steel composite tower of the hybrid tower wind turbine generator set, and specifically comprises the following steps:

[0015] Step 1: transport the prefabricated tower ring segments to the construction site and place them in order of installation. Align the teeth and tooth grooves of adjacent tower ring segments, insert through bolts into the reserved bolt holes and tighten them. Weld and fix the ends of adjacent arc-shaped steel pipe segments in sequence to form a tower segment. Bond the CFRP cloth wrapped section on the outer surface of the spliced tower segment.

[0016] Step 2: After a tower segment is spliced, the upper tower segment is installed and positioned in a vertical staggered manner. The lower end of the longitudinal reinforcement of the upper tower segment is fixedly connected to the upper end of the longitudinal reinforcement of the lower tower segment through a connecting sleeve. The lower end of the arc-shaped steel pipe segment of the upper tower segment is welded to the upper end of the arc-shaped steel pipe segment of the lower tower segment through a V-groove weld. At the same time, the inner liner is welded on the inner side of the connection of the arc-shaped steel pipe segment. A formwork is set up at the connection position between the upper tower segment and the lower tower segment, and concrete is poured inward. During the pouring process, the concrete is vibrated evenly to ensure that the concrete is densely filled. After the concrete curing is completed, CFRP cloth is bonded to the outer side of the connection.

[0017] Step 3: After completing the construction of the mixed tower section from bottom to top according to step 2, insert prestressed tendons into the turning block and tension the prestressed tendons;

[0018] Step 4: Use lifting equipment to lift the steel tower section, accurately place it on the upper end of the mixed tower section, and connect the steel tower section and the mixed tower section together to complete the construction of the FRP-concrete-steel composite tower of the mixed tower wind turbine.

[0019] The preparation method of the tower ring segment includes:

[0020] Step 1: Make curved steel segments according to the design dimensions, weld studs on the outer wall of the curved steel segments, make steering blocks, and weld the steering blocks to the inner wall of the curved steel segments;

[0021] Step 2: Place the curved steel pipe segment in the mold, arrange longitudinal steel bars and stirrups on the outside of the curved steel pipe segment according to the design requirements, set recesses and protrusions corresponding to the teeth and tooth grooves at both ends of the mold, pour concrete in the mold outside the curved steel pipe segment, set reserved bolt holes at both ends of the mold, and allow part of the curved steel pipe segment, longitudinal steel bars and stirrups to extend out of the concrete end face. After the concrete curing is completed, the tower ring segment is obtained and removed from the mold;

[0022] Step 3: Prepare all tower ring segments according to steps 1-2.

[0023] FRP stands for Fiber Reinforced Polymer / Plastic;

[0024] CFRP stands for Carbon Fiber Reinforced Polymer / Plastic;

[0025] UHPC stands for Ultra-High Performance Concrete.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The FRP-concrete-steel combined tower of the hybrid wind turbine of the present invention has a steel pipe located inside, which mainly bears bending moment and shear force and provides structural support for the tower; the CFRP cloth is wrapped in the outermost layer, and by utilizing its own high tensile strength, light weight and high strength characteristics, it can bear part of the tensile force, reduce the tensile stress of the concrete, and delay the occurrence of cracks. In addition, the joint constraint of the external CFRP and the internal steel pipe can put the concrete in a three-dimensional compression state, thereby improving the compressive strength and ductility of the concrete, causing greater deformation and absorbing more energy before the structure is destroyed, and avoiding brittle failure. When subjected to repeated loads, the concrete stress is shared, the accumulation rate of fatigue damage is reduced, and the fatigue resistance is improved. In terms of design, the concrete constrained by the CFRP and steel pipe can also appropriately reduce the amount of steel bars, avoid complex steel bar configuration, and reduce the difficulty of construction.

[0028] 2. In terms of tower segment connection, the present invention uses UHPC post-cast strips to connect the upper and lower segments, which has many advantages over traditional epoxy resin adhesive bonding. In terms of strength, UHPC post-cast strips are more resistant to compression and tension, and the connection is more secure. In terms of durability, it has good impermeability and corrosion resistance, and can resist environmental erosion. The long-term performance of epoxy resin adhesive is easily affected by the environment. In terms of construction speed, UHPC post-cast strips are easy to operate and may cure faster, which can shorten the construction period. The tooth grooves and through-bolts are used to connect the adjacent ring pieces in the transverse direction. The tooth grooves increase the contact area and friction between the adjacent ring pieces, and the through-bolts provide a strong tightening force. The combination of the two can effectively improve the shear and tensile resistance of the connection parts. The shape and size of the tooth grooves have a positioning function. During installation, they can guide the adjacent ring pieces to be accurately positioned, ensure the overall coaxiality and verticality of the mixed tower, make the mixed tower structure more regular, and facilitate subsequent construction.

[0029] 3. In terms of tower segment connection, the present invention uses steel bar connecting sleeves to connect the longitudinal steel bars of each tower segment together. Compared with traditional epoxy resin adhesive bonding (without connecting steel bars), the steel bar connecting sleeve connection makes the tower structure more integrated and improves the structure's ability to resist external forces (such as wind loads and seismic loads). BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The overall structure of the FRP-concrete-steel combined tower of the hybrid wind turbine of the present invention is shown in FIG. Figure 1 ;

[0031] Figure 2 The overall structure of the FRP-concrete-steel combined tower of the hybrid wind turbine of the present invention is shown in FIG. Figure 2 ;

[0032] Figure 3 This is an enlarged view of the mixing tower section;

[0033] Figure 4 This is a schematic diagram of the horizontal joint connection of the upper and lower tower segments;

[0034] Figure 5 This is a schematic diagram of the splitting of the upper and lower tower segments;

[0035] Figure 6 This is a schematic diagram of tower segments composed of tower rings;

[0036] Figure 7 It is a structural diagram of a single tower ring segment;

[0037] Figure 8 This is a schematic diagram of tower ring assembly;

[0038] Figure 9 This is an enlarged view of the V-groove weld of the inner steel pipe.

[0039] The figures are marked as follows: steel tower section 1, concrete tower section 2, tower segment 3, tower ring segment 4, reinforced concrete main part 41, concrete layer 41a, longitudinal steel bar 41b, stirrups 41c, teeth 41d, tooth grooves 41e, reserved bolt holes 41f, through bolts 41g, inner steel pipe part 42, arc-shaped steel pipe segment 42a, studs 42b, steering blocks 42c, CFRP cloth wrapped section 43, connection assembly 5, connection sleeve 51, inner lining pipe 52, post-cast concrete belt 53, V-groove weld 54, prestressed tendons 6. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Based on the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts are within the scope of protection of this application.

[0041] Obviously, the drawings described below are merely examples or embodiments of the present application. Those skilled in the art can, without inventive effort, apply the present application to other similar scenarios based on these drawings. Furthermore, it is also understood that, although the effort involved in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, changes in design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as an insufficiency of the content disclosed in this application.

[0042] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments unless there is a conflict.

[0043] The FRP-concrete-steel composite tower of the hybrid wind turbine designed by the present invention is composed of multiple tower segments 3, such as Figure 1-2 As shown, each tower segment 3 is composed of five arc-shaped tower ring pieces 4. Figure 6 As shown, the tower ring segment 4 is fan-shaped, with a corresponding central angle of 72°. Five adjacent tower ring segments 4 are spliced together into a tower segment 3 using a tooth-slot-through bolt connection method. The upper and lower adjacent segments are installed with vertical seams staggered at 36°. UHPC post-cast strips are set at the connection and CFRP cloth is wrapped on the outside. Prestressed tendons 6 are inserted into the perforated steering block 42c, and the prestressed tendons 6 are tensioned to finally form the mixed tower segment of the combined wind turbine tower ( Figure 1-2 ).

[0044] The tower ring segment 4 is manufactured as follows:

[0045] Step 1: Fabricate and Process the Curved Steel Tube Segments: Fabricate curved steel tube segments 42a according to the design dimensions. Weld studs 42b to the outer wall of the curved steel tube segments 42a to enhance adhesion with the concrete. Fabricate diverter blocks 42c with holes to ensure accurate hole placement for the subsequent insertion of prestressed tendons 6. Weld these diverter blocks 42c to the inner wall of the curved steel tube segments 42a.

[0046] Step 2: Make the tower ring segment body: Place the processed arc-shaped steel tube segment 42a in the mold and use it as the tower ring segment of the mixed tower section ( Figure 7 ) inner formwork, longitudinal reinforcement 41b and stirrups 41c are arranged according to design requirements. Teeth 41d and grooves 41e for transverse connection of the ring segments are reserved at the vertical joints of the formwork, ensuring accurate dimensions and facilitating splicing with adjacent ring segments. Concrete is poured into the mold, with bolt holes 41f created at the corresponding locations. Portions of the curved steel segments 42a, longitudinal reinforcement 41b, and stirrups 41c are allowed to extend beyond the concrete end faces to facilitate connection with the tower ring segment 4 above. After the concrete is cured, the tower ring segment 4 is obtained and removed from the mold.

[0047] The installation method of the FRP-concrete-steel combined tower of the hybrid wind turbine is as follows:

[0048] (1) Transport the prefabricated tower ring segments 4 to the construction site and place them in the order of installation. Align the teeth 41d and tooth grooves 41e of adjacent ring segments to ensure that the reserved bolt holes 41f are through. Then, insert the through bolts 41g into the reserved bolt holes 41f and tighten them. Weld the adjacent inner arc steel pipe segments 42a from the inside of the tower to complete the splicing of the five ring segments into a tower segment 3 ( Figure 6 CFRP sheets are bonded to the outer surface of the spliced tower segments at designed intervals to enhance the strength and stability of the structure.

[0049] (2) After the tower segments 3 are spliced together, the upper tower segments 3 are installed and positioned in a vertical staggered manner of 36°. The corresponding longitudinal reinforcement 41b is connected through the connecting sleeve 51. The upper inner arc steel pipe segment 42a and the lower inner arc steel pipe segment 42a are welded with a V-groove weld 54, and an inner lining pipe 52 is welded on the inner side of the steel pipe connection to ensure a reliable connection between the upper and lower steel pipes. A formwork is set up at the connection position, and the UHPC material is poured inward. During the pouring process, attention is paid to uniform vibration to ensure that the UHPC is densely filled in the connection part. After the curing of the post-cast UHPC is completed, the CFRP cloth is bonded to the connection to improve the structural performance of the connection.

[0050] (3) After the construction of the mixed tower section 2 is completed from bottom to top according to the above steps, the prestressed tendons 6 are inserted through the turning block 42c and tensioned according to the design requirements.

[0051] (4) Use lifting equipment to lift the steel tower section 1 and accurately place it at the connection position with the mixed tower section. Connect the steel tower section and the mixed tower section together through welding, bolting, etc., thereby completing the construction of the FRP-concrete-steel composite tower of the entire mixed tower wind turbine.

[0052] The above embodiments are preferred implementations of the present invention, but the implementation of the present invention is not limited to the embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A FRP-concrete-steel composite tower for a mixed tower wind turbine, comprising a steel tower section (1) and a mixed tower section (2), wherein the steel tower section (1) is mounted on the upper portion of the mixed tower section (2), and is characterized by: The mixed tower section (2) is composed of a plurality of tower segments (3) connected in sequence up and down. Each tower segment (3) is composed of a plurality of arc-shaped tower ring pieces (4) surrounded and assembled. The tower ring pieces (4) in the same tower segment (3) are fixedly connected to each other, and vertical joints are formed between the tower ring pieces (4). The vertical joints between upper and lower adjacent tower segments (3) are staggered. The tower ring piece (4) includes a reinforced concrete main part (41), an inner steel pipe part (42) arranged inside the reinforced concrete main part (41), and a CFRP cloth wrapped section (43) arranged outside the reinforced concrete main part (41). The reinforced concrete main parts (41) and the inner steel pipe parts (42) of upper and lower adjacent tower segments (3) are connected respectively, so that adjacent tower segments (3) are fixed to each other.

2. The FRP-concrete-steel combined tower of the hybrid wind turbine according to claim 1 is characterized by: The reinforced concrete main part (41) comprises a concrete layer (41a), longitudinal steel bars (41b) and stirrups (41c), wherein the longitudinal steel bars (41b) and stirrups (41c) are arranged in the concrete layer (41a), and teeth (41d) and tooth grooves (41e) are respectively provided at both ends of the reinforced concrete main part (41), and the teeth (41d) and tooth grooves (41e) are respectively provided with penetrating reserved bolt holes (41f). In a tower segment (3), the teeth (41d) of a tower ring segment (4) can be exactly inserted into the tooth grooves (41e) of the adjacent tower ring segment (4), and the reserved bolt holes of the teeth (41d) and tooth grooves (41e) are exactly aligned, and through bolts (41g) pass through the reserved bolt holes to fix the two tower ring segments (4) to each other.

3. The FRP-concrete-steel combined tower of the hybrid wind turbine according to claim 2 is characterized by: The inner steel pipe portion (42) includes an arc-shaped steel pipe segment (42a) and a stud (42b). The arc-shaped steel pipe segment (42a) is fixed to the inner side of the concrete layer (41a) by the stud (42b). In a tower segment (3), the end of the arc-shaped steel pipe segment (42a) of one tower ring segment (4) is welded and fixed to the end of the arc-shaped steel pipe segment (42a) of the adjacent tower ring segment (4).

4. The FRP-concrete-steel combined tower of the hybrid wind turbine according to claim 3 is characterized by: The longitudinal steel bars (41b), stirrups (41c) and arc-shaped steel tube segments (42a) partially extend upward or downward to the upper or lower end of the tower ring segment (4), and the upper and lower adjacent tower segments (3) are fixedly connected by a connecting assembly (5).

5. The FRP-concrete-steel combined tower of the hybrid wind turbine according to claim 4 is characterized by: The connection assembly (5) comprises a connection sleeve (51), an inner lining pipe (52) and a post-cast concrete strip (53); the longitudinal steel bars (41b) are fixedly connected by the connection sleeve (51); the arcuate steel pipe segments (42a) are welded together by V-groove welding (54); the inner lining pipe (52) is then welded on the inner side of the connection between the arcuate steel pipe segments (42a); concrete is poured between the upper and lower adjacent tower segments (3); the concrete buries the longitudinal steel bars (41b), stirrups (41c) and the connection sleeve (51), and forms a post-cast concrete strip (53).

6. The FRP-concrete-steel combined tower of the hybrid wind turbine according to claim 5 is characterized by: The inner steel pipe part (42) also includes a steering block (42c). There are several steering blocks (42c). Each steering block (42c) is provided with a hole that passes through the top and bottom. The steering block (42c) is welded to the inner side of the arc-shaped steel pipe segment (42a). The steering blocks (42c) of the upper and lower adjacent tower segments (3) are aligned up and down. The prestressed tendons (6) vertically pass through the steering blocks (42c) and tension the prestress.

7. The FRP-concrete-steel combined tower of the hybrid wind turbine according to claim 5 is characterized by: The material used for the post-cast concrete belt (53) is UHPC.

8. The FRP-concrete-steel combined tower of a hybrid wind turbine according to claim 1 is characterized by: Each tower segment (3) is composed of five arc-shaped tower ring pieces (4) surrounded by each other, and the vertical joints between upper and lower adjacent tower segments (3) are installed with a 36° staggered joint.

9. The construction method of the FRP-concrete-steel composite tower of a hybrid wind turbine is characterized by: The FRP-concrete-steel combined tower for a hybrid wind turbine according to claim 6 specifically comprises the following steps: Step 1: transport the prefabricated tower ring segments (4) to the construction site, place them in sequence according to the installation order, align the teeth (41d) and tooth grooves (41e) of adjacent tower ring segments (4), insert the through bolts (41g) into the reserved bolt holes (41f) and tighten them, weld the ends of adjacent arc-shaped steel pipe segments (42a) in sequence, and splice them into a tower segment (3); bond the CFRP cloth wrapped segment (43) on the outer surface of the spliced tower segment (3), Step 2: After a tower segment (3) is spliced, the upper tower segment (3) is installed and positioned in a vertical staggered manner. The lower end of the longitudinal steel bar (41b) of the upper tower segment (3) is fixedly connected to the upper end of the longitudinal steel bar (41b) of the lower tower segment (3) through a connecting sleeve (51). The lower end of the arc-shaped steel pipe segment (42a) of the upper tower segment (3) is welded to the upper end of the arc-shaped steel pipe segment (42a) of the lower tower segment (3) through a V-shaped groove weld (54). At the same time, an inner lining pipe (52) is welded on the inner side of the connection between the arc-shaped steel pipe segment (42a). A template is supported at the connection position between the upper tower segment (3) and the lower tower segment (3). Concrete is poured inwardly. During the pouring process, the concrete is vibrated evenly to ensure that the concrete is densely filled. After the concrete curing is completed, CFRP cloth is bonded to the outer side of the connection. Step 3: After the construction of the mixing tower section (2) is completed from bottom to top according to step 2, the prestressed tendons (6) are inserted into the steering block (42c) to tension the prestressed tendons (6); Step 4: Use the lifting equipment to lift the steel tower section (1), accurately place it on the upper end of the mixed tower section (2), and connect the steel tower section (1) and the mixed tower section (2) together, thereby completing the construction of the FRP-concrete-steel combined tower of the mixed tower wind turbine.

10. The construction method of the FRP-concrete-steel combined tower of a hybrid wind turbine according to claim 9, wherein: The preparation method of the tower ring segment (4) comprises: Step 1: Prepare an arc-shaped steel pipe segment (42a) according to the design dimensions, weld studs (42b) to the outer wall of the arc-shaped steel pipe segment (42a), prepare a steering block (42c), and weld the steering block (42c) to the inner wall of the arc-shaped steel pipe segment (42a); Step 2: placing the arc-shaped steel pipe segment (42a) in a mold, arranging longitudinal steel bars (41b) and stirrups (41c) on the outside of the arc-shaped steel pipe segment (42a) according to design requirements, providing recesses and protrusions corresponding to the teeth (41d) and tooth grooves (41e) at both ends of the mold, pouring concrete in the mold outside the arc-shaped steel pipe segment (42a), providing reserved bolt holes (41f) at both ends of the mold, and allowing part of the arc-shaped steel pipe segment (42a), longitudinal steel bars (41b) and stirrups (41c) to extend out of the concrete end face. After the concrete curing is completed, a tower ring segment (4) is obtained, and the tower ring segment (4) is taken out of the mold; Step 3: Prepare all tower ring segments (4) according to steps 1-2.

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