Concrete tower piece joint reinforcing device and construction method

Abstract

The invention relates to a concrete tower piece joint reinforcing device and a construction method, an upper-layer tower piece is arranged above a lower-layer tower piece, the reinforcing device comprises sleeves and connecting plates, the two sides of the upper ends of the inner wall and the outer wall of the lower-layer tower piece are connected with the sleeves respectively, and the sleeves on the two sides of the upper ends of the inner wall and the outer wall of the lower-layer tower piece are connected through the connecting plates. The upper-layer tower piece is erected on the connecting plate, welding studs are arranged on the surface of the sleeve, the lower-layer tower piece is arranged on the lower-layer tower piece in a sleeving mode, then the lower-layer tower piece is poured to achieve connection between the lower-layer tower piece and the connecting plate and connection between the lower-layer tower piece and the sleeve, and the welding studs are embedded in the lower-layer tower piece. After the upper-layer tower piece is erected on the device, filler is poured to fill the inner wall and the outer wall of the upper-layer tower piece and a gap between the connecting plate and the sleeve, and the welding stud is embedded in the filler. Compared with the prior art, the tower piece can be prevented from being pressed and damaged due to stress concentration at the joints between the tower sections, and the transverse shear resistance and bearing capacity of the tower piece in the using stage are also improved.

Description

Technical Field

[0001] The invention belongs to the technical field of super-high tower construction, and relates to a concrete tower segment joint reinforcement device and a construction method. Background Art

[0002] With the rapid development of the wind power industry, the total installed capacity of wind power generation has continued to increase, and the capacity of a single unit has increased from hundreds of kilowatts to multiple megawatts, which has put forward higher requirements for wind power towers. At present, prefabricated concrete towers have become the mainstream choice in the wind power industry. At present, the horizontal joints of most tower pieces are dry joints, which are often bonded with epoxy glue. This bonding method is relatively weak, resulting in cracks, collapse, and falling off at the joints of the tower pieces. In addition, dry joints are not conducive to the leveling of the tower pieces and are prone to various diseases.

[0003] Patent CN214272173U discloses a comprehensive emergency rescue treatment structure for bridge pile foundation de-stack, including a pile foundation de-stack area, a steel sleeve, underwater bottom concrete, a pile foundation and a steel cofferdam; underwater bottom concrete is poured at a certain position below the pile foundation de-stack area, a steel sleeve is installed on the upper part of the underwater bottom concrete, and self-compacting concrete is poured into the steel sleeve. This patent is suitable for the reinforcement of existing structures. Although the steel sleeve has a good clamping effect, the bonding between the steel sleeve and the main body is poor; at the same time, this patent is suitable for integral pile columns and cannot enhance the bonding effect of the upper and lower tower plates.

[0004] Patent CN210797265U discloses a slow-bonding weld nail and a steel-concrete composite beam using the slow-bonding weld nail, including a steel structure and a concrete slab connected as a whole by slow-bonding weld nails, and a prestressed steel hinge wire is arranged on the concrete slab by post-tensioning. However, the patent is applicable to beam structures and is not directly applicable to hollow wind power concrete towers. Summary of the invention

[0005] The purpose of the present invention is to provide a concrete tower segment joint reinforcement device and a construction method in order to overcome at least one defect of the above-mentioned prior art, such as the relatively weak concrete tower segment joints. The present invention can avoid the compressive damage of the tower segment caused by stress concentration at the joints between tower sections, and also improve the lateral shear resistance and bearing capacity of the tower segment during the use stage.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] One of the technical solutions of the present invention is to provide a concrete tower segment joint reinforcement device, wherein the upper tower segment is arranged above the lower tower segment, the reinforcement device comprises a sleeve and a connecting plate, the upper ends of the inner and outer walls of the lower tower segment are respectively connected to the sleeves, the sleeves on both sides of the upper ends of the inner and outer walls of the lower tower segment are connected to each other through the connecting plate, the inner and outer sleeves and the connecting plate are combined into an H-shaped configuration, the upper tower segment is mounted on the connecting plate to achieve the connection between the upper tower segment and the lower tower segment, welding nails are arranged on the surface of the sleeve, the device is sleeved on the lower tower segment and then the lower tower segment is cast to achieve the connection between the lower tower segment and the connecting plate and the sleeve, the welding nails are buried in the lower tower segment, the upper tower segment is mounted on the connecting plate, and the upper tower segment is connected to the connecting plate and the sleeve. After the tower piece is erected on the device, fillers are poured to fill the inner and outer walls of the upper tower piece and the gap between the connecting plate and the sleeve. The welding nails are buried in the fillers. The inner and outer sleeves can enhance the compressive strength of the tower piece joints, prevent crushing damage caused by local stress concentration, and increase the circumferential shear bearing capacity of the tower piece. At the same time, it has a waterproof effect and can protect the prestressed tendons and steel bars from rust. The connecting plate can connect the inner and outer sleeves to facilitate construction. The welding nails enhance the bonding effect of the reinforcing device with the tower piece and the fillers, and enhance the integrity and rigidity of the tower piece. The fillers enhance the bonding between the upper and lower tower pieces, enhance the overall performance and rigidity of the structure, and participate in the force together with the reinforcing device.

[0008] Furthermore, the inner side of the upper end of the inner wall of the lower tower segment is connected to the inner sleeve, the outer surface of the inner sleeve is vertically connected to the connecting plate, and the inner sleeve and the outer sleeve together participate in the overall stress of the structure, thereby strengthening the compressive resistance and annular shear bearing capacity of the tower segment joint position.

[0009] Furthermore, the outer side of the upper end of the outer wall of the lower tower plate is connected to the outer sleeve, and the inner surface of the outer sleeve is vertically connected to the connecting plate.

[0010] Furthermore, a welding nail is arranged on the outer surface of the inner sleeve below the connecting plate, the nail head end of the welding nail is connected to the outer surface of the inner sleeve, and the nail cap end faces the outer sleeve;

[0011] The welding nails are embedded in the lower tower plate, and the welding nails enhance the bonding effect between the reinforcing device and the tower plate, thereby enhancing the integrity and rigidity of the tower plate.

[0012] Furthermore, a welding nail is arranged on the inner surface of the outer sleeve below the connecting plate, the nail head end of the welding nail is connected to the inner surface of the outer sleeve, and the nail cap end faces the inner sleeve;

[0013] The welding nails are embedded in the lower tower plate, and the welding nails enhance the bonding effect between the reinforcing device and the tower plate, thereby enhancing the integrity and rigidity of the tower plate.

[0014] Furthermore, a welding nail is arranged on the outer surface of the inner sleeve above the connecting plate, the nail head end of the welding nail is connected to the outer surface of the inner sleeve, and the nail cap end faces the outer sleeve;

[0015] After the lower end of the upper tower segment is mounted on the upper surface of the connecting plate, the filler is poured to fill the inner wall of the upper tower segment and the gap between the connecting plate and the inner sleeve. The welding nails are buried in the filler. The welding nails enhance the bonding effect between the reinforcing device and the filler, thereby enhancing the integrity and rigidity of the tower segment.

[0016] Furthermore, a welding nail is arranged on the inner surface of the outer sleeve above the connecting plate, the nail head end of the welding nail is connected to the inner surface of the outer sleeve, and the nail cap end faces the inner sleeve;

[0017] After the lower end of the upper tower piece is mounted on the upper surface of the connecting plate, the filler is poured to fill the outer wall of the upper tower piece and the gap between the connecting plate and the outer sleeve. The welding nails are buried in the filler. The welding nails enhance the bonding effect between the reinforcing device and the filler, thereby enhancing the integrity and rigidity of the tower piece.

[0018] Furthermore, before the upper tower segment is erected on the device, the paving material is cast on the connecting plate, and the inner sleeve is connected to the outer sleeve through the spaced connecting plates, that is, the connection method between the inner sleeve and the outer sleeve adopts repeated connecting plate-blank-connecting plate, and the paving material connects the inner and outer sleeves, leaving a gap for leveling, and the connection plates are arranged at intervals for leveling.

[0019] As a preferred technical solution, the area of ​​the blank is equal to the area of ​​the connecting plate.

[0020] As a preferred technical solution, the material of the lower tower plate is concrete, and the material of the upper tower plate is steel.

[0021] Furthermore, the inner sleeve, the connecting plate, the outer sleeve and the welding nails are all made of steel, the paving material is made of mortar, and the filling material is made of concrete.

[0022] One of the technical solutions of the present invention is to provide a method for constructing joints of concrete tower segments, wherein the method uses the reinforcement device to strengthen the joint positions of concrete tower segments, and the method comprises the following steps:

[0023] S1. Prefabricate the inner sleeve, outer sleeve and welding pins in the factory, weld the welding pins evenly and reasonably to the inner sleeve and the outer sleeve, and weld the connecting plate at intervals to the middle position between the inner sleeve and the outer sleeve;

[0024] S2. Use a bracket to fix the prefabricated reinforcement device above the lower tower piece so that the connecting plate is just at the top of the lower tower piece, and install the bracket and formwork to cast the main body of the lower tower piece;

[0025] S3, transporting the prefabricated lower tower piece to the designated location;

[0026] S4. After the lower tower pieces are hoisted, a thin layer of paving material is poured at the connection plate at the joint position and leveled;

[0027] S5. After the paving material solidifies, the upper tower piece is hoisted, and the filling material is poured between the inner sleeve, the outer sleeve and the main body of the upper tower piece;

[0028] S6. Subsequent construction can be carried out after the filling material solidifies.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) The steel-concrete prefabricated reinforced joint (inner and outer sleeves) of the present invention provides additional circumferential constraints for the wind turbine tower segments, forming a hoop effect, thereby enhancing the local pressure bearing at the joint position of the wind turbine tower, thereby avoiding the stress concentration at the joint position between tower sections that causes the tower segments to be compressed and partially crushed, and also improving the transverse shear bearing capacity of the wind turbine tower segments during the use stage, thereby ensuring the stability of the wind turbine tower during the construction stage of tensioning the prestressed tendon lines;

[0031] (2) The present invention provides a connecting plate between the inner and outer sleeves, which can connect the inner and outer sleeves together to form a whole, and jointly participate in the force, thereby improving the integrity and rigidity of the structure, and also improving the construction efficiency. The spaced connecting plates facilitate leveling;

[0032] (3) The present invention achieves a bonding effect between the H-shaped inner sleeve, connecting plate and outer sleeve combined reinforcement device and the concrete tower piece by welding nails;

[0033] (4) After the lower tower piece is hoisted, a thin layer of paving material is cast at the joint position, which can help the upper tower piece to be leveled, avoid the structure from deflecting before prestressing, endangering the personal safety of construction workers, and improve the local pressure bearing capacity and integrity of the joint position;

[0034] (5) The present invention enhances the waterproof performance of the tower section through the circumferential steel-concrete joint, thereby avoiding the phenomenon of cracking and water leakage at the joint position after the tension zone of the tower section is decompressed;

[0035] (6) The reinforcement device of the present invention adopts a prefabricated cast-in-place combination method, which can better utilize the construction method of prefabricated assembly of wind turbine tower segments, and at the same time greatly improves the bonding effect of the upper and lower tower segments. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall assembly of a concrete tower segment joint reinforcement device according to an embodiment of the present invention;

[0037] Figure 2 It is a schematic diagram of the overall structure of a concrete tower segment joint reinforcement device in an embodiment of the present invention;

[0038] Figure 3 It is a schematic cross-sectional assembly diagram of a concrete tower segment joint reinforcement device according to an embodiment of the present invention;

[0039] Figure 4 It is a partial enlarged assembly schematic diagram of a concrete tower segment joint reinforcement device according to an embodiment of the present invention;

[0040] Figure 5 It is a partially enlarged structural schematic diagram of a concrete tower segment joint reinforcement device in an embodiment of the present invention.

[0041] Description of the markings in the figure:

[0042] 1—lower tower plate, 2—upper tower plate, 31—inner sleeve, 32—connecting plate, 33—outer sleeve, 34—welding nails, 4—filler. DETAILED DESCRIPTION

[0043] The present invention is described in detail below in conjunction with specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0044] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are used to describe common objects, which only refer to different instances of the same object, and are not intended to imply that the objects described in this way must adopt a given order, whether in time, space, order or any other way.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Example:

[0047] A concrete tower joint reinforcement device is used to strengthen the horizontal joints of the upper tower 2 and the lower tower 1 of the assembled wind power tower. Figures 1 to 5 As shown, the upper tower plate 2 is arranged above the lower tower plate 1, the reinforcement device includes a sleeve and a connecting plate 32, the upper ends of the inner and outer walls of the lower tower plate 1 are respectively connected to the sleeves, the sleeves on both sides of the upper ends of the inner and outer walls of the lower tower plate 1 are connected to each other through the connecting plate 32, the inner and outer sleeves and the connecting plate 32 are combined into an H-shaped configuration, the upper tower plate 2 is mounted on the connecting plate 32 to achieve the connection between the upper tower plate 2 and the lower tower plate 1, the surface of the sleeve is provided with welding nails 34, the device is installed above the lower tower plate 1, and the lower tower plate 1 is cast to achieve the connection between the lower tower plate 1 and the connecting plate 32 and the sleeve, the welding nails 34 are buried in the lower tower plate 1, and the upper tower plate 2 is mounted on the device The upper back-cast filler 4 fills the inner and outer walls of the upper tower piece 2 and the gap between the connecting plate 32 and the sleeve. The welding nail 34 is buried in the filling material 4. The inner and outer sleeves can strengthen the compressive strength of the tower piece joint position, prevent the crushing damage caused by local stress concentration, and increase the circumferential shear bearing capacity of the tower piece. At the same time, it has a waterproof effect and can protect the prestressed tendons and steel bars from rust. The connecting plate 32 can connect the inner and outer sleeves to facilitate construction. The welding nail 34 strengthens the bonding effect between the reinforcing device and the tower piece and the filling material 4, and strengthens the integrity and rigidity of the tower piece. The filling material 4 strengthens the bonding between the upper and lower tower pieces, strengthens the overall performance and rigidity of the structure, and participates in the force together with the reinforcing device.

[0048] The inner side of the upper end of the inner wall of the lower tower plate 1 is connected to the inner sleeve 31, and the outer surface of the inner sleeve 31 is vertically connected to the connecting plate 32. The inner sleeve 31 and the outer sleeve 33 participate in the overall force of the structure, and strengthen the compressive capacity and circumferential shear bearing capacity of the tower plate joint position;

[0049] The outer side of the upper end of the outer wall of the lower tower plate 1 is connected to the outer sleeve 33, and the inner surface of the outer sleeve 33 is vertically connected to the connecting plate 32;

[0050] A welding nail 34 is arranged on the outer surface of the inner sleeve 31 below the connecting plate 32, the nail head end of the welding nail 34 is connected to the outer surface of the inner sleeve 31, and the nail cap end faces the outer sleeve 331;

[0051] The welding nail 34 is embedded in the lower tower plate 1, and the welding nail 34 enhances the bonding effect between the reinforcing device and the tower plate, thereby enhancing the integrity and rigidity of the tower plate;

[0052] A welding nail 34 is arranged on the inner surface of the outer sleeve 33 below the connecting plate 32, the nail head end of the welding nail 34 is connected to the inner surface of the outer sleeve 33, and the nail cap end faces the inner sleeve 31;

[0053] The welding nail 34 is embedded in the lower tower plate 1, and the welding nail 34 enhances the bonding effect between the reinforcing device and the tower plate, thereby enhancing the integrity and rigidity of the tower plate;

[0054] A welding nail 34 is arranged on the outer surface of the inner sleeve 31 above the connecting plate 32, the nail head end of the welding nail 34 is connected to the outer surface of the inner sleeve 31, and the nail cap end faces the outer sleeve 33;

[0055] After the lower end of the upper tower piece 2 is mounted on the upper surface of the connecting plate 32, the filler 4 is poured to fill the inner wall of the upper tower piece 2 and the gap between the connecting plate 32 and the inner sleeve 31, and the welding nail 34 is embedded in the filler 4. The welding nail 34 enhances the bonding effect between the reinforcing device and the filler 4, thereby enhancing the integrity and rigidity of the tower piece;

[0056] A welding nail 34 is arranged on the inner surface of the outer sleeve 33 above the connecting plate 32, the nail head end of the welding nail 34 is connected to the inner surface of the outer sleeve 33, and the nail cap end faces the inner sleeve 31;

[0057] After the lower end of the upper tower piece 2 is mounted on the upper surface of the connecting plate 32, the filler 4 is poured to fill the outer wall of the upper tower piece 2 and the gap between the connecting plate 32 and the outer sleeve 33, and the welding nail 34 is embedded in the filler 4. The welding nail 34 enhances the bonding effect between the reinforcing device and the filler 4, thereby enhancing the integrity and rigidity of the tower piece;

[0058] The upper tower plate 2 is placed on the device before pouring the paving material on the connecting plate 32. The inner sleeve 31 is connected to the outer sleeve 33 through the spaced connecting plates 32. That is, the connection method between the inner sleeve 31 and the outer sleeve 33 uses a repeated connecting plate 32-blank-connecting plate 32. The area of ​​the blank can be equal to the area of ​​the connecting plate 32. The paving material connects the inner and outer sleeves, leaving a gap for easy leveling. The spaced arrangement of the connecting plates 32 is also for easy leveling.

[0059] The material of the lower tower plate 1 is self-compacting concrete, which is convenient for construction, shortens the construction period and increases the strength. The material of the upper tower plate 2 is weather-resistant steel plate, which can improve the anti-corrosion performance, prevent rust and enhance the durability.

[0060] The materials of the inner sleeve 31, the connecting plate 32, the outer sleeve 33 and the welding nails 34 are all weather-resistant steel plates, which can improve the corrosion resistance, prevent rust and enhance the durability. The material of the paving material is epoxy resin mortar, which further enhances the bonding effect of the upper and lower tower plates. The material of the filler 4 is self-compacting concrete, which is convenient for construction, shortens the construction period and increases the strength.

[0061] A method for constructing a joint of a concrete tower segment, using the above-mentioned reinforcement device to strengthen the joint position of the concrete tower segment, the specific steps are as follows:

[0062] S1. Prefabricate the inner sleeve 31, the outer sleeve 33 and the welding pins 34 in the factory, weld the welding pins 34 evenly and reasonably to the inner sleeve 31 and the outer sleeve 33, and weld the connecting plate 32 at intervals to the middle position between the inner sleeve 31 and the outer sleeve 33;

[0063] S2, using a bracket to fix the prefabricated reinforcement device above the lower tower plate 1, so that the connecting plate 32 is just at the top of the lower tower plate 1, and the bracket and formwork are installed, and the main body of the lower tower plate 1 is cast;

[0064] S3, transporting the prefabricated lower tower piece 1 to a designated location;

[0065] S4, after hoisting the lower tower piece 1, pour a thin layer of paving material at the connection plate 32 at the joint position and level it;

[0066] S5, after the paving material solidifies, hoist the upper tower plate 2, and pour the filling material 4 between the inner sleeve 31, the outer sleeve 33 and the main body of the upper tower plate 2;

[0067] S6. After the filler 4 solidifies, subsequent construction can be carried out.

[0068] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A concrete tower joint reinforcement device, characterized in that: The upper tower plate (2) is arranged above the lower tower plate (1), the reinforcing device comprises a sleeve and a connecting plate (32), the upper ends of the inner and outer walls of the lower tower plate (1) are respectively connected to the sleeves, the sleeves on the upper ends of the inner and outer walls of the lower tower plate (1) are connected to each other through the connecting plate (32), the upper tower plate (2) is mounted on the connecting plate (32), a welding nail (34) is arranged on the surface of the sleeve, the device is mounted on the lower tower plate (1) and then the lower tower plate (1) is cast to achieve the connection between the lower tower plate (1), the connecting plate (32) and the sleeve, the welding nail (34) is embedded in the lower tower plate (1), the upper tower plate (2) is mounted on the device and then a filler (4) is cast to fill the inner and outer walls of the upper tower plate (2) and the gap between the connecting plate (32) and the sleeve, the welding nail (34) is embedded in the filler (4).

2. A concrete tower segment joint reinforcement device according to claim 1, characterized in that: The inner side of the upper end of the inner wall of the lower tower plate (1) is connected to the inner sleeve (31), and the outer surface of the inner sleeve (31) is vertically connected to the connecting plate (32).

3. A concrete tower segment joint reinforcement device according to claim 2, characterized in that: The outer side of the upper end of the outer wall of the lower tower plate (1) is connected to the outer sleeve (33), and the inner surface of the outer sleeve (33) is vertically connected to the connecting plate (32).

4. A concrete tower segment joint reinforcement device according to claim 3, characterized in that: A welding nail (34) is arranged on the outer surface of the inner sleeve (31) below the connecting plate (32), the nail head end of the welding nail (34) is connected to the outer surface of the inner sleeve (31), and the nail cap end faces the outer sleeve (33); The welding pins (34) are embedded in the lower tower plate (1).

5. A concrete tower segment joint reinforcement device according to claim 3, characterized in that: A welding nail (34) is arranged on the inner surface of the outer sleeve (33) below the connecting plate (32), the nail head end of the welding nail (34) is connected to the inner surface of the outer sleeve (33), and the nail cap end faces the inner sleeve (31); The welding pins (34) are embedded in the lower tower plate (1).

6. A concrete tower segment joint reinforcement device according to claim 3, characterized in that: A welding nail (34) is arranged on the outer surface of the inner sleeve (31) above the connecting plate (32), the nail head end of the welding nail (34) is connected to the outer surface of the inner sleeve (31), and the nail cap end faces the outer sleeve (33); After the lower end of the upper tower plate (2) is mounted on the upper surface of the connecting plate (32), a filler (4) is poured to fill the inner wall of the upper tower plate (2) and the gap between the connecting plate (32) and the inner sleeve (31), and the welding studs (34) are embedded in the filler (4).

7. A concrete tower segment joint reinforcement device according to claim 3, characterized in that: A welding nail (34) is arranged on the inner surface of the outer sleeve (33) above the connecting plate (32), the nail head end of the welding nail (34) is connected to the inner surface of the outer sleeve (33), and the nail cap end faces the inner sleeve (31); After the lower end of the upper tower plate (2) is mounted on the upper surface of the connecting plate (32), a filler (4) is poured to fill the outer wall of the upper tower plate (2) and the gap between the connecting plate (32) and the outer sleeve (33), and the welding pins (34) are embedded in the filler (4).

8. A concrete tower segment joint reinforcement device according to claim 3, characterized in that: The upper tower plate (2) is erected on the device and the paving material is poured on the connecting plate (32) before being erected. The inner sleeve (31) is connected to the outer sleeve (33) through the spaced connecting plate (32).

9. A concrete tower segment joint reinforcement device according to claim 8, characterized in that: The inner sleeve (31), the connecting plate (32), the outer sleeve (33) and the welding nail (34) are all made of steel, the material of the paving material is mortar, and the material of the filler (4) is concrete.

10. A method for constructing a concrete tower segment joint, characterized in that: The method uses the reinforcement device according to any one of claims 1 to 9 to reinforce the joint position of the concrete tower segment, and the method comprises the following steps: S1. Prefabricate the inner sleeve (31), the outer sleeve (33) and the welding pins (34) in a factory, weld the welding pins (34) to the inner sleeve (31) and the outer sleeve (33), and weld the connecting plate (32) between the inner sleeve (31) and the outer sleeve (33) at intervals; S2, using a bracket to fix the prefabricated reinforcement device on the top of the lower tower plate (1), so that the connecting plate (32) is just at the top of the lower tower plate (1), and the bracket and the formwork are installed, and the main body of the lower tower plate (1) is cast; S3, transporting the prefabricated lower tower plate (1) to a designated location; S4, after the lower tower piece (1) is hoisted, the paving material is poured at the connection plate (32) at the joint position and leveled; S5, after the paved material solidifies, the upper tower plate (2) is hoisted, and the filling material (4) is poured between the inner sleeve (31), the outer sleeve (33) and the main body of the upper tower plate (2); S6. The filling material (4) solidifies.

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