Single steel plate composite structure tower drum based on edge UHPC reinforcement and construction method

Abstract

The invention discloses a single steel plate concrete combined tower drum based on edge UHPC reinforcement and a construction method.The tower drum of the combined structure is composed of a plurality of combined drum piece units in the circumferential direction, the adjacent drum piece units are connected and fastened in the circumferential direction through bolt end plates and bent bolts to form combined drum sections, the combined drum sections are assembled in the axial direction to form a drum body, and the drum body is made of concrete. The diameters of the combined cylinder sections of the cylinder body are reduced from low to high, and the adjacent combined cylinder sections are assembled through bolt flange joints. Each cylinder piece unit is composed of an arc-shaped outer steel plate, a T-shaped PBL connecting piece, an edge UHPC, common concrete and reinforcing steel bars. Embedded bolt and bent bolt hole channels are arranged on the two sides of each cylinder piece unit, and bolt flanges are welded on the upper portion and the lower portion. A steel plate-concrete combined structure is adopted, and the advantages of being high in bearing capacity, high in rigidity, good in stability and the like are achieved. The UHPC is filled at the edge of the cylinder piece, so that the performance of the cylinder piece can be obviously improved. All the components are produced in a standardized mode and connected in a dry mode on site, construction is convenient, and connection is reliable.

Description

Technical Field

[0001] The present invention belongs to the field of wind power high towers, and in particular relates to a single steel plate composite structure tower tube based on edge UHPC reinforcement and a construction method. Background Art

[0002] In the field of new energy, wind energy is a clean and renewable energy with huge resources that are inexhaustible. Wind turbine towers are important components that bear upper loads and transmit base reaction forces. Their performance will directly affect the normal operation of wind turbines. Therefore, tower performance plays an important role in the normal power generation of wind turbines.

[0003] At present, large wind turbine towers are mainly pure steel towers and pure concrete towers. Pure steel towers are easy to construct and have a short construction period, but the tower rigidity is small. As wind power becomes larger, the tower installation and production costs also increase. Concrete tower technology is relatively mature, with high rigidity and good integrity, but it requires on-site steel bar tying and pouring, and has a long construction period. Therefore, it is urgent to develop a new tower structure with superior performance. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a single steel plate composite structure tower and a construction method based on edge UHPC reinforcement, so as to improve the overall stiffness of the tower and extend the service life of the tower, and improve the on-site construction efficiency.

[0005] In order to achieve the above-mentioned purpose, the tower of the present invention adopts a steel plate-concrete composite structure as a whole. This structure has the advantages of high bearing capacity, high rigidity, good stability, etc. The inner filling concrete adopts the form of UHPC-ordinary concrete to improve the overall strength of the cylinder body. Compared with the traditional pure steel tower, it can greatly reduce the amount of steel materials used and significantly reduce the cost; compared with the traditional concrete tower, it can effectively reduce the amount of steel bar binding, reduce the construction difficulty, and improve the construction efficiency.

[0006] To this end, the first aspect of the present invention provides a single steel plate composite structure tower based on edge UHPC reinforcement, including a barrel, wherein the barrel is composed of a plurality of combined barrel segments assembled in sections along the axial direction, and the diameter of each combined barrel segment decreases from low to high, and bolt flange nodes are used for assembly between adjacent combined barrel segments;

[0007] Each of the combined barrel sections is assembled from a plurality of single steel plate-UHPC combined shells in the annular direction, and adjacent single steel plate-UHPC combined shells are connected and fastened by embedded bolts and bent bolts;

[0008] The single steel plate-UHPC combined shell includes an outer steel plate, a plurality of T-shaped PBL connectors, edge UHPC and ordinary concrete. The edge UHPC is arranged at the four boundaries of the inner wall of the outer steel plate to form a closed frame. The ordinary concrete is located in the closed frame. Each of the T-shaped PBL connectors is welded to the inner wall of the outer steel plate and extends into the ordinary concrete and the edge UHPC.

[0009] In one embodiment, the thickness of the inner steel plate is not less than 6 mm, the thickness of the UHPC is not less than 160 mm, and the thickness of ordinary concrete is not less than 160 mm.

[0010] In one embodiment, the T-type PBL connectors are arranged at intervals along the height direction of the combined barrel section and are evenly arranged along the circumferential direction of the combined barrel section; the T-type PBL connectors are welded by a T-type flange plate and an open hole web, the open hole web is vertically welded to the inner wall of the outer steel plate, and the T-type flange plate is welded to the side of the open hole web away from the outer steel plate.

[0011] In one embodiment, the perforated web is provided with reserved holes, and the reserved holes are evenly arranged along the height direction of the combined barrel section and staggered along the radial direction of the combined barrel section, with two holes arranged on the side close to the outer steel plate and one hole arranged on the side away from the outer steel plate.

[0012] In one embodiment, longitudinal steel bars and circumferential steel bars are also arranged in the single steel plate-UHPC combined shell; the longitudinal steel bars are arranged along the entire length of the combined tube section in the height direction and are evenly arranged along the circumferential direction of the combined tube section; the circumferential steel bars are multiple rows of steel bars, which are arranged at equal intervals along the height direction of the combined shell.

[0013] In one embodiment, the UHPC on the left and right edges of the single steel plate-UHPC combined shell are provided with bent bolt grooves, the bent bolt grooves are provided with bolt holes, and the adjacent single steel plate-UHPC combined shells are internally connected and fastened by passing bent bolts through the bolt holes.

[0014] In one embodiment, embedded bolts are provided on the left and right outer sides of the outer steel plate, and the outsides of adjacent single steel plate-UHPC combined shells are connected and fastened by embedded bolts, end plates and hexagonal nuts.

[0015] In one embodiment, the bolt flange node includes an upper flange plate, a lower flange plate and high-strength bolts embedded in the lower flange plate. The upper flange plate and the lower flange plate of adjacent combined barrel sections are connected by high-strength bolts and high-strength nuts to achieve connection of adjacent barrel sections.

[0016] In one embodiment, the outer diameter of the upper flange plate and the lower flange plate is the same as the outer diameter of the outer steel plate, and they are welded to the outer steel plate; the inner diameter is smaller than the inner diameter of the edge UHPC, and PBL connectors are welded on the top of the upper flange plate and the bottom of the lower flange plate to interface with the edge UHPC.

[0017] In one embodiment, the upper flange plate is welded by a rib plate, a fastening plate and an upper top plate, and a flange hole is opened on the fastening plate; the lower flange plate is welded by a lower bottom plate and an outer arc plate, and high-strength bolts are arranged on the lower bottom plate.

[0018] In one embodiment, the PBL connectors welded to the top of the upper flange plate and the bottom of the lower flange plate are evenly spaced along the annular direction of the combined barrel section.

[0019] The second aspect of the present invention further provides a construction method of the single steel plate composite structure tower based on edge UHPC reinforcement described in the first aspect, comprising:

[0020] 1) In the factory, the steel plate is rolled into an outer steel plate, the T-shaped PBL connector is welded to the inner wall of the outer steel plate, and the circumferential and longitudinal steel bars are tied;

[0021] 2) In the factory, first pour the edge UHPC on the inside of the outer steel plate, and then pour ordinary concrete on the inside of the edge UHPC to complete the processing of the UHPC-ordinary concrete composite shell;

[0022] 3) On site, the circumferential connection is completed by embedded bolts and bent bolts, and the above circumferential connection is repeated to obtain several combined barrel sections. Adjacent combined barrel sections are connected and assembled by bolt flange nodes, and the above longitudinal connection is repeated to obtain the barrel body.

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

[0024] 1) Convenient construction

[0025] The single steel plate composite structure tower based on edge UHPC reinforcement has a simple structure. The composite tube section is composed of several single steel plate-UHPC composite shells connected by embedded bolts and bent bolts. Adjacent composite tube sections are spliced ​​by bolt flange nodes. Compared with traditional concrete towers, it can effectively save on-site construction time, reduce installation difficulty, and improve construction efficiency. All components are produced in a standardized manner and are dry-connected on-site, which is convenient for construction and reliable.

[0026] 2) Performance Improvement

[0027] The single steel plate composite structure tower based on edge UHPC reinforcement gives full play to the advantages of the composite structure. The combination of UHPC and ordinary concrete significantly increases the strength of the cylinder. The UHPC is set at the edge of the cylinder to effectively improve the connection performance. The T-type PBL connector effectively improves the collaborative working ability of the outer steel plate-UHPC-ordinary concrete, increases the integrity of the shell unit, and can also enhance the buckling resistance of the outer steel plate. The bolt flange node has a high bearing capacity, and the PBL connector welded on the flange plate can effectively enhance the direct interface connection between the shell unit and the flange plate, improving the integrity of the tower.

[0028] 3) Good economic efficiency

[0029] The single steel plate composite structure tower based on edge UHPC reinforcement gives full play to the characteristics and performance of different materials, and compared with pure steel tower, it can greatly reduce the amount of steel used and reduce the production cost. The shell unit can be transported in pieces, reducing the transportation cost. On-site piece assembly facilitates the layout planning of the construction site, while reducing the lifting load requirements of the lifting machinery, reducing the project cost, and has good economic benefits.

[0030] In general, the single steel plate composite structure tower based on edge UHPC reinforcement has the advantages of high cylinder strength, small shell cross-sectional area, and strong bearing capacity. Compared with the traditional pure steel tower, it can greatly reduce the amount of steel used and reduce the production cost; compared with the concrete tower, it can effectively save on-site construction period and improve construction efficiency. The T-type PBL connector effectively improves the collaborative working ability of the outer steel plate-UHPC-ordinary concrete, and enhances the buckling resistance of the outer steel plate. The bolt flange node has a high bearing capacity, and the PBL connector welded on the flange plate can effectively enhance the direct interface connection between the shell unit and the flange plate, thereby improving the integrity of the tower. All components of the present invention are produced in a standardized manner, dry-connected on-site, easy to construct, reliable in connection, and have a wide range of engineering application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is an overall schematic diagram of a single steel plate-UHPC combined structure tower of the present invention.

[0032] Figure 2 It is an overall schematic diagram of the single steel plate-UHPC combined shell in the present invention.

[0033] Figure 3 It is an overall schematic diagram of the T-type PBL connector in the present invention.

[0034] Figure 4 It is an overall schematic diagram of the annular connection of the tower in the present invention.

[0035] Figure 5 It is a detailed schematic diagram of the annular connection of the tower in the present invention.

[0036] Figure 6 It is an overall schematic diagram of the vertical connection of the tower in the present invention.

[0037] Figure 7 It is an overall schematic diagram of the bolt flange node in the present invention.

[0038] Icons: 1-barrel; 2-combined barrel section; 3-single steel plate-UHPC combined shell; 4-bolt flange node; 5-embedded bolt; 6-bent bolt; 7-external steel plate; 8-T-type PBL connector; 9-edge UHPC; 10-ordinary concrete; 11-circumferential steel bar; 12-longitudinal steel bar; 13-T-type flange plate; 14-opening web; 15-reserved hole; 16-bolt groove; 17-end plate; 18-upper flange plate; 19-lower flange plate; 20-high-strength bolt; 21-PBL connector; 22-flange hole; 23-high-strength nut; 24-rib plate; 25-fastening plate; 26-upper top plate; 27-lower bottom plate; 28-outer arc plate. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product is usually placed when in use. These are only for the convenience of describing the present application 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 should not be understood as a limitation on the present application.

[0043] like Figure 1As shown, a tower with a single steel plate composite structure reinforced by edge UHPC includes a body 1, which is composed of a plurality of combined barrel sections 2 assembled in sections along the axial direction, and adjacent combined barrel sections 2 are assembled through bolt flange nodes 4. The tower is normally used in a vertical state, so the axial direction of the present invention refers to the direction vertical to the ground. At the same time, the tower generally decreases in diameter along the height direction, so in the present invention, the diameter of each combined barrel section 2 decreases from low to high.

[0044] The combined barrel section 2 of the present invention is in a combined form, and is assembled along the annular direction by a plurality of single steel plate-UHPC combined shells 3. The assembly unit is assembled on site, which can improve the transportation efficiency of the components. At the same time, the combined barrel section 2 can adjust the size and shape of the shell unit according to different actual working conditions, and has a certain adaptability to different engineering projects. The shell unit design is adopted, which makes it more convenient to maintain or replace a single unit without destroying the overall structure, thereby reducing the cost of long-term operation and maintenance.

[0045] refer to Figure 2 and Figure 3 As shown, a single steel plate-UHPC composite shell 3 is composed of an outer steel plate 7, a T-type PBL connector 8, an edge UHPC 9, ordinary concrete 10, annular steel bars 11 and longitudinal steel bars 12. Among them, UHPC 9 is arranged inside the outer steel plate 7, ordinary concrete 10 is placed inside the edge UHPC 9, and the T-type PBL connector 8 is welded to the inner wall of the outer steel plate 7 and extends into the edge UHPC 9 and ordinary concrete 10. The annular steel bars 11 are all buried in the ordinary concrete 10, and there are no annular steel bars in the edge UHPC 9. Here, longitudinal refers to the direction along the height of the barrel, and annular refers to the direction along the circumference of the barrel section.

[0046] In the above-mentioned single steel plate-UHPC composite shell 3, the outer steel plate 7 has strong tensile and compressive properties, and can be used as an outer formwork for casting the edge UHPC 9. The T-type PBL connector 8 has strong shear and tensile properties, which can increase the integrity of the single steel plate-UHPC composite shell 3. The edge UHPC 9 is cast at the four boundaries inside the outer steel plate 7, has extremely strong compressive strength, can increase the tower stiffness, and can constrain the outer steel plate 7 to prevent it from buckling. Ordinary concrete 10 also has strong compressive strength. Compared with the edge UHPC 9, it has a better price advantage. When used in combination with the edge UHPC 9, cost reduction and efficiency improvement can be achieved. The circumferential steel bars 11 enhance the circumferential stiffness of the ordinary concrete 10 and constrain the cylinder to prevent it from buckling. The longitudinal steel bars 12 enable the cylinder structure to withstand greater bending moments.

[0047] In order to save materials and facilitate construction while ensuring structural performance, for example, the thickness of the outer steel plate 7 of the present invention is not less than 6 mm, the thickness of the edge UHPC 9 is not less than 160 mm, and the thickness of the ordinary concrete 10 is not less than 160 mm.

[0048] The staggered hole design of the T-shaped PBL connector 8 of the present invention effectively improves the collaborative working ability of the outer steel plate, UHPC and ordinary concrete. The perforated web 14 directly forms a mortise and tenon connection with the edge UHPC 9 and ordinary concrete 10, thereby enhancing the integrity of the shell unit. Figure 2 As shown, the T-type PBL connectors 8 are arranged at intervals along the height direction of the combined barrel section 2 and are evenly arranged along the circumferential direction of the combined barrel section 2; the T-type PBL connector 8 is welded by a T-type flange plate 13 and a perforated web plate 14, the perforated web plate 14 is vertically welded to the inner wall of the outer steel plate 7 and parallel to the axial direction of the tower, and the T-type flange plate 13 is welded to the side of the perforated web plate 14 away from the outer steel plate 7.

[0049] In the distribution structure of the T-type PBL connector 8, the perforated webs 14 are evenly arranged along the height and circumference of the combined barrel section 2, and the entire structure forms a complete support system that can transfer the upper unit load to the edge UHPC 9 and ordinary concrete 10, thereby improving the integrity of the tower.

[0050] Furthermore, in a specific form of the staggered hole design of the perforated web 14 of the present invention, the holes on the side of the perforated web 14 away from the outer steel plate 7 can be used as holes for the annular reinforcement 11 to pass through.

[0051] Specifically, a layout form of the circumferential steel bars 11 and the longitudinal steel bars 12 in the single steel plate-UHPC composite shell 3. Each longitudinal steel bar 12 is arranged along the height direction of the composite shell, and is evenly arranged along the circumferential direction of the composite shell; the circumferential steel bars 11 are multiple rows of steel bars, which are arranged at equal intervals along the height direction of the composite shell, and the inner row of circumferential steel bars 11 passes through the hole of the perforated web 14 away from the side of the outer steel plate 7.

[0052] In the above structure, the arrangement of the longitudinal reinforcement 12 can ensure the uniform load-bearing capacity of the tower in all directions and improve the overall stability. The arrangement of the annular reinforcement 11 can strengthen the connection between the ordinary concrete 10 and the edge UHPC 9 and the outer steel plate 7, and provide the compressive strength of the shell unit. At the same time, it also helps to ensure that different materials of the shell unit bear the same load and avoid stress concentration.

[0053] In the present invention, reference Figure 4As shown, adjacent single steel plate-UHPC combined shells 3 are connected and fastened by embedded bolts 5 and bent bolts 6. More specifically, bolt grooves 16 are provided at the left and right edges of the single steel plate-UHPC combined shell 3, and bent bolt holes are provided inside the bolt grooves 16. The adjacent single steel plate-UHPC combined shells 3 are connected and fastened internally by bent bolts 6 passing through the bent bolt holes, and embedded bolts 5 are provided on the left and right sides of the outer steel plate 7. The adjacent single steel plate-UHPC combined shells 3 are connected and fastened externally by embedded bolts 5, end plates 17 and hexagonal nuts 23.

[0054] In this structure, the embedded bolts 5 and the bent bolts 6 are used to achieve a high-strength connection method, which can firmly connect adjacent shell units and make the combined barrel section 2 have stronger integrity. The embedded bolts 5 and the bent bolts 6 are arranged in multiple rows to avoid stress concentration at the shell annular connection nodes. For some engineering projects that have special requirements for installation, the connection nodes can also be adjusted accordingly to meet the needs of the engineering projects. The layout positions of the embedded bolts 5 and the bolt grooves 16 can be determined in advance during the design of the prefabrication factory to facilitate on-site installation. At the construction site, the shell installation can be positioned by the embedded bolts 5 and the end plate 17, and then the end plate 17 and the bent bolts 6 can be used to quickly install the adjacent shell units, effectively saving construction time and budget. At the same time, when there is a need for maintenance and repair, the end plate 17 and the bent bolts 6 allow for disassembly and reassembly, which is convenient for later maintenance. Compared with the traditional concrete tower grouting connection, the use of end plate 17 and bent bolt 6 connection reduces construction cost and time. Compared with the traditional pure steel tower, the detachability of end plate 17 and bent bolt 6 facilitates the replacement of partially damaged shell units and extends the service life of the tower.

[0055] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, the bolt flange node 4 includes an upper flange plate 18, a lower flange plate 19 and high-strength bolts 20. The upper flange plate 18 and the lower flange plate 19 of adjacent combined barrel sections 2 are connected by high-strength bolts 20 to achieve connection of adjacent barrel sections. The high-strength bolts 20 are evenly arranged along the circumferential direction of the combined barrel section 2.

[0056] Furthermore, the outer diameter of the upper flange plate 18 and the lower flange plate 19 is the same as the outer diameter of the outer steel plate 7, and they are welded to the outer steel plate 7. The inner diameter of the upper flange plate 18 and the lower flange plate 19 is equal to the inner diameter of the ordinary concrete 10, and PBL connectors 21 are welded to the top of the upper flange plate 18 and the bottom of the lower flange plate 19 to interface with the edge UHPC9, ensuring the integrity between the flange plate and the shell unit, protecting the internal edge UHPC9 and the ordinary concrete 10, preventing corrosive substances from entering the structure, thereby improving the corrosion resistance of the tower.

[0057] Furthermore, the high-strength bolts 20 and the flange holes 22 on the upper flange plate 18 achieve precise matching between the upper and lower adjacent flange plates. The high-strength bolts 20 pass through the flange holes 22 on the upper flange plate 18 and then tighten the high-strength nuts 23 to complete the vertical connection of the barrel section 2.

[0058] The construction method of the single steel plate composite structure tower tube based on edge UHPC reinforcement of the present invention mainly includes the following steps:

[0059] 1. Design and material preparation.

[0060] Before construction, detailed design is required according to the specific requirements of the project, including the size of the tower, the specifications and quantity of steel bars, the ratio of UHPC and concrete, etc. At the same time, the required materials such as steel plates, steel bars, embedded bolts, bent bolts, welding equipment, UHPC and concrete raw materials are prepared.

[0061] 2. The inner steel plate is processed in the factory.

[0062] In the factory, the steel plate is cut into corresponding sizes according to the design requirements, and is rolled into a desired shape using equipment such as a plate rolling machine to form an outer steel plate 7.

[0063] 3. T-type PBL connector.

[0064] According to the design requirements, a T-shaped PBL connector 8 is welded on the inner wall of the outer steel plate 7 to ensure a firm connection and that the welding quality meets the engineering standards.

[0065] 4. Tie up steel bars.

[0066] The circumferential reinforcement 11 and the longitudinal reinforcement 12 are tied on the inner side of the outer steel plate 7 according to the design requirements. The reinforcements should be tied evenly to ensure that the concrete can be evenly stressed after pouring.

[0067] 5. Concrete pouring.

[0068] In the factory, UHPC and concrete raw materials are mixed according to the proportion, and the edge UHPC 9 is first poured inside the outer steel plate 7. After completion, ordinary concrete 10 is poured inside the edge UHPC 9 to complete the processing of the single steel plate-UHPC composite shell 3.

[0069] 6. On-site construction.

[0070] The processed single steel plate-UHPC combined shell 3 is transported to the site. The circumferential connection of adjacent shell units is completed using end plates 17 and bent bolts 6 to obtain a plurality of combined barrel sections 2.

[0071] 8. Flange node connection.

[0072] Adjacent combined barrel sections 2 are connected and assembled through bolt flange nodes 4 , and the upper and lower barrel sections are positioned using high-strength bolts 20 and flange holes 22 , and are connected through high-strength bolts 20 and high-strength nuts 23 .

[0073] Through the above steps, the construction method of the single steel plate composite structure tower based on edge UHPC reinforcement can ensure the stability, safety and durability of the structure while improving the construction efficiency and economy.

[0074] In summary, the present invention discloses a single steel plate composite structure tower and a construction method based on edge UHPC reinforcement. The composite structure tower is composed of a plurality of composite cylinder units in the circumferential direction. Adjacent cylinder units are connected and fastened in the circumferential direction by bolt end plates and bent bolts to form a composite cylinder section. The composite cylinder sections are assembled axially to form a cylinder body. The diameter of each composite cylinder section decreases from low to high. Adjacent composite cylinder sections are assembled by bolt flange nodes. The cylinder unit is composed of an arc-shaped outer steel plate, a T-type PBL connector, an edge UHPC, ordinary concrete and steel bars. Embedded bolts and bent bolt holes, and upper and lower welded bolt flanges are provided on both sides of the cylinder unit. The present invention adopts a steel plate-concrete composite structure, which has the advantages of high bearing capacity, high rigidity, good stability and the like. Filling UHPC at the edge of the cylinder can significantly improve the performance of the cylinder. All components of the present invention are produced in a standardized manner, dry-connected on site, convenient for construction, and reliable for connection.

[0075] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A single steel plate composite structure tower based on edge UHPC reinforcement, characterized in that: The barrel (1) comprises a barrel body (1), wherein the barrel body (1) is composed of a plurality of combined barrel segments (2) assembled in sections along the axial direction, and the diameter of each combined barrel segment (2) decreases from low to high, and adjacent combined barrel segments (2) are assembled using bolt flange nodes (4); Each of the combined barrel sections (2) is assembled from a plurality of single steel plate-UHPC combined shells (3) in the circumferential direction, and adjacent single steel plate-UHPC combined shells (3) are connected and fastened by embedded bolts (5) and bent bolts (6); The single steel plate-UHPC combined shell (3) comprises an outer steel plate (7), a plurality of T-shaped PBL connectors (8), edge UHPC (9) and ordinary concrete (10), wherein the edge UHPC (9) is arranged at four boundaries of the inner wall of the outer steel plate (7) to form a closed frame, the ordinary concrete (10) is located in the closed frame, and each of the T-shaped PBL connectors (8) is welded to the inner wall of the outer steel plate (7) and extends into the ordinary concrete (10) and the edge UHPC (9).

2. The single steel plate composite structure tower based on edge UHPC reinforcement according to claim 1 is characterized in that: The thickness of the outer steel plate (7) is not less than 6 mm, the thickness of the UHPC (9) is not less than 160 mm, and the thickness of the ordinary concrete (10) is not less than 160 mm.

3. The single steel plate composite structure tower based on edge UHPC reinforcement according to claim 1 is characterized in that: The T-shaped PBL connectors (8) are arranged at intervals along the height direction of the combined barrel section (2) and are evenly arranged along the circumferential direction of the combined barrel section (2); the T-shaped PBL connectors (8) are welded from a T-shaped flange plate (13) and a perforated web plate (14), the perforated web plate (14) is vertically welded to the inner wall of the outer steel plate (7), and the T-shaped flange plate (13) is welded to a side of the perforated web plate (14) away from the outer steel plate (7).

4. The single steel plate composite structure tower based on edge UHPC reinforcement according to claim 3 is characterized in that: The perforated web (14) is provided with reserved holes (15), and the reserved holes (15) are evenly arranged along the height direction of the combined barrel section (2), staggered along the radial direction of the combined barrel section (2), two are arranged on the side close to the outer steel plate (7), and one is arranged on the side away from the outer steel plate (7).

5. The single steel plate composite structure tower based on edge UHPC reinforcement according to claim 1, characterized in that: The single steel plate-UHPC combined shell (3) is also provided with longitudinal steel bars (12) and circumferential steel bars (11); the longitudinal steel bars (12) are arranged along the entire length of the combined tube section (2) in the height direction and are evenly arranged along the circumferential direction of the combined tube section (2); the circumferential steel bars (11) are multiple rows of steel bars, which are evenly spaced along the height direction of the combined shell.

6. The single steel plate composite structure tower based on edge UHPC reinforcement according to claim 1, characterized in that: The UHPC (9) at the left and right edges of the single steel plate-UHPC combined shell (3) is provided with bent bolt grooves (16), the bent bolt grooves (16) are provided with bolt holes, and adjacent single steel plate-UHPC combined shells (3) are internally connected and fastened by passing bent bolts (6) through the bolt holes.

7. The single steel plate composite structure tower based on edge UHPC reinforcement according to claim 1, characterized in that: The bolt flange node (4) comprises an upper flange plate (18), a lower flange plate (19) and high-strength bolts (20) pre-buried in the lower flange plate (19), and the upper flange plate (18) and the lower flange plate (19) of adjacent combined barrel sections (2) are connected by the high-strength bolts (20) and the high-strength nuts (23) to realize the connection of the upper and lower adjacent barrel sections.

8. The single steel plate composite structure tower based on edge UHPC reinforcement according to claim 7, characterized in that: The outer diameters of the upper flange plate (18) and the lower flange plate (19) are the same as the outer diameter of the outer steel plate (7) and are welded to the outer steel plate (7); the inner diameters are smaller than the inner diameter of the edge UHPC (9), and PBL connectors (21) are welded to the top of the upper flange plate (18) and the bottom of the lower flange plate (19) to form an interface connection with the edge UHPC (9).

9. The single steel plate composite structure tower based on edge UHPC reinforcement according to claim 7, characterized in that The upper flange plate (18) is welded together by a rib plate (24), a fastening plate (25) and an upper top plate (26), and a flange hole (22) is formed on the fastening plate (25); the lower flange plate (19) is welded together by a lower bottom plate (27) and an outer arc plate (28), and high-strength bolts (20) are pre-buried on the lower bottom plate (27).

10. A construction method for a single steel plate composite structure tower based on edge UHPC reinforcement as claimed in any one of claims 1 to 9, characterized in that: The steps include: Step 1), in the factory, the steel plate is rolled into an outer steel plate (7), a T-shaped PBL connector (8) is welded to the inner wall of the outer steel plate (7), and the circumferential steel bars (11) and the longitudinal steel bars (12) are tied; Step 2), in the factory, firstly, the edge UHPC (9) is poured inside the outer steel plate (7), and then ordinary concrete (10) is poured inside the edge UHPC (9) to complete the processing of the single steel plate-UHPC combined shell (3); Step 3), on site, the circumferential connection is completed by embedded bolts (5) and bent bolts (6), and the above circumferential connection is repeated to obtain a plurality of combined barrel sections (2). Adjacent combined barrel sections (2) are connected and assembled by bolt flange nodes (4), and the above longitudinal connection is repeated to obtain the barrel body (1).

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