Segmented prefabricated prestressed concrete tower drum adopting combined vertical connection and construction method

Abstract

The invention discloses a sectional type prefabricated prestressed concrete tower drum adopting combined vertical connection and a construction method, the sectional type prefabricated prestressed concrete tower drum adopting combined vertical connection comprises a sectional type prefabricated prestressed concrete drum body adopting combined vertical connection, and the drum body is formed by combining, connecting and assembling a plurality of drum sections through steel pipe mortises and tenons and bent bolts in the vertical direction. The diameter of the cylinder sections is reduced upwards in the height direction, and each cylinder section is formed by splicing a plurality of prefabricated prestressed concrete ring pieces through bent bolts in the ring direction. The steel pipe tenon-and-mortise is composed of a steel pipe tenon, a steel pipe mortise and high-strength concrete, the steel pipe tenon and the steel pipe mortise are pre-embedded in the outer side of the prefabricated concrete ring piece, the prestressed tendon penetrates through the steel pipe tenon-and-mortise to tension prestress, and the bolt hole is formed in the position, corresponding to the steel pipe tenon-and-mortise, of the inner side of the prefabricated concrete ring piece. The upper cylinder section and the lower cylinder section are connected through the combination of the steel pipe tenon-and-mortise and the bent bolts, and the connecting strength and the construction efficiency are improved; prestress is applied to each ring piece of the tower drum, so that the safety and durability of the structure are improved, and the production cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power generation structure and prestressed concrete structure, and in particular relates to a segmental prefabricated prestressed concrete tower using combined vertical connections and a construction method. Background Art

[0002] In the field of wind power generation, towers are crucial to the stable operation and power generation efficiency of wind turbines. Traditional concrete towers have exposed many problems in practice. Traditional cast-in-place concrete towers have the advantages of good stability and high bearing capacity, but the construction quality is difficult to control, and problems such as loose pouring and cracks are prone to occur, which seriously affects the strength and durability of the tower and brings hidden dangers to the long-term operation of wind turbines.

[0003] As the wind power industry expands to low wind speed areas, large megawatt wind turbines emerge, placing higher demands on the tower's load-bearing capacity, stability, and earthquake resistance. However, neither cast-in-place nor traditional prefabricated segmented concrete towers can meet these stringent requirements. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a segmented prefabricated prestressed concrete tower and construction method using combined vertical connections, so as to meet the strength, stability and crack resistance requirements of the large-scale development trend of wind turbine towers and reduce the construction difficulty.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A segmental prefabricated prestressed concrete tower adopting combined vertical connection comprises a cylinder body, wherein the cylinder body is formed by connecting and assembling a plurality of tubular cylinder segments through a combined vertical connection structure along the axial direction, and the diameter of each cylinder segment decreases from low to high; the combined vertical connection structure comprises a steel pipe mortise and tenon and a bent bolt;

[0007] Each of the cylinder sections is assembled along the annular direction by a plurality of prefabricated prestressed concrete ring pieces which are fastened and connected by two bent bolts.

[0008] In one embodiment, the steel pipe mortise and tenon comprises a steel pipe tenon and a steel pipe tenon groove; the steel pipe tenon is arranged on the upper end face or the lower end face of the precast prestressed concrete ring segment, and the steel pipe tenon groove is arranged on the lower end face or the upper end face of the precast prestressed concrete ring segment. The steel pipe tenon corresponds to the steel pipe tenon groove one by one, and the upper and lower adjacent precast prestressed concrete ring segments are connected in a mortise and tenon connection manner.

[0009] In one embodiment, the steel pipe tenon is composed of a square steel pipe, a perforated steel plate and a top plate. The square steel pipe is buried in the precast prestressed concrete ring along the tube height direction, and the end is exposed. The perforated steel plate is welded around the outer side of the exposed part of the end of the square steel pipe. The top plate is welded to the end of the square steel pipe close to one end of the precast prestressed concrete ring, and a reserved hole is provided on the top plate.

[0010] The steel pipe mortise and tenon is composed of two square steel pipes and a bottom plate. The two square steel pipes are buried in the prefabricated prestressed concrete ring along the tube height direction and are flush with the end surface. The bottom plate is welded to one end of the two square steel pipes close to the prefabricated prestressed concrete ring, and two reserved holes are provided on the bottom plate.

[0011] In one embodiment, the size of square steel pipe one is smaller than that of square steel pipe two, and the size after welding the perforated steel plate is slightly smaller than that of square steel pipe two. The steel pipe tenon is inserted into the steel pipe tenon groove, and then filled with high-strength concrete to achieve connection.

[0012] In one embodiment, the upper and lower ends of each of the prefabricated prestressed concrete ring pieces are provided with bolt holes 1, and the bolt holes 1 at the upper and lower ends respectively penetrate:

[0013] The upper end face and the inner side face or the outer side face of the prefabricated prestressed concrete ring segment, and,

[0014] The lower end surface and the inner side surface or the outer side surface of the prefabricated prestressed concrete ring segment;

[0015] The bent bolts 1 pass through bolt holes 1 of upper and lower adjacent prefabricated prestressed concrete ring pieces to achieve connection.

[0016] In one embodiment, the bolt holes 1 correspond one to one with the steel pipe mortise and tenon, and one bolt hole 1 and one steel pipe mortise and tenon are in the same radial direction.

[0017] In one embodiment, the prefabricated prestressed concrete ring segment includes a prefabricated concrete ring segment and a prestressed tendon stretched in the prefabricated concrete ring segment, and two bolt holes are arranged at the left and right ends of the prefabricated concrete ring segment, and the two bolt holes at the left and right ends respectively penetrate:

[0018] The left end face and the inner side face or the outer side face of the prefabricated prestressed concrete ring segment, and,

[0019] The right end face and the inner side face or the outer side face of the prefabricated prestressed concrete ring piece;

[0020] The second bent bolt passes through the second bolt hole of the left and right adjacent prefabricated prestressed concrete ring pieces to achieve connection.

[0021] In one embodiment, the precast concrete ring segments are composed of concrete, steel mesh and prestressed tendon pipes. The prestressed tendon pipes are buried along the cylinder height direction and are used to tension prestressed tendons. The prestressed tendons correspond to steel pipe mortise and tenon joints. The steel pipe mortise and tenon joints are provided with reserved holes for the prestressed tendons to pass through. The precast prestressed concrete ring segments are staggered in the cylinder height direction.

[0022] The present invention also provides a construction method of the segmental prefabricated prestressed concrete tower using combined vertical connections, the steps of which are as follows:

[0023] Step 1), in the factory, a prefabricated prestressed concrete ring is made, and steel pipe mortise and tenon joints are installed at the upper and lower ends thereof, and bolt holes 1 for connection with bent bolt 1 are reserved, and bolt holes 2 for connection with bent bolt 2 are reserved at the left and right ends;

[0024] Step 2), in a factory or on site, using bent bolts to connect prefabricated prestressed concrete ring segments to obtain a cylinder segment;

[0025] Step 3), on site, use the combined vertical connection structure to connect and assemble the cylinder sections to complete the construction.

[0026] In one embodiment, the prefabricated prestressed concrete ring segment is manufactured as follows:

[0027] Step 11), a top plate with a reserved hole 1 is welded at one end of the square steel tube 1, and a perforated steel plate is welded around the outer side of the other end to obtain a steel tube tenon; a bottom plate with a reserved hole 2 is welded at one end of the square steel tube 2 to obtain a steel tube tenon groove;

[0028] Step 12), installing the steel mesh, the steel pipe tenon and the steel pipe tenon groove in the template of the precast concrete ring piece, reserving the positions of the bolt hole 1, the bolt hole 2 and the prestressed tendon pipe, pouring concrete, and obtaining the precast concrete ring piece;

[0029] Step 13), passing the prestressed tendons through the prestressed tendon pipeline, completing the tensioning of the prestressed tendons, and obtaining a prefabricated prestressed concrete ring piece.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1) Superior performance

[0032] The segmented prefabricated prestressed concrete tower with combined vertical connections uses segmented prestressing technology to apply prestress to the concrete on the outer side of the tower ring segment, putting the concrete under compression, greatly inhibiting the generation and development of cracks and improving the structure's impermeability and durability. The vertical connection between the upper and lower sections uses a combination of steel pipe mortise and tenon joints and bent bolts, which can efficiently transfer various complex loads and greatly enhance the overall strength and stability of the tower.

[0033] 2) Easy construction

[0034] The segmental prefabricated prestressed concrete tower with combined vertical connection adopts the prefabricated segmented production method. Each prefabricated prestressed concrete ring is produced in a standardized manner in the factory, with controllable quality and high production efficiency. After being transported to the site, it is quickly combined and connected through steel pipe mortise and tenon joints and bent bolts, which greatly shortens the on-site construction time. The steel pipe mortise and tenon joint connection only requires a small amount of high-strength concrete to be poured, and there is no need to support formwork and vibrate. It is easy to operate and reduces the construction process and technical difficulty.

[0035] 3) Reduce construction costs

[0036] The segmented prefabricated prestressed concrete tower with combined vertical connection uses concrete as the main material, and steel is only used in key connection parts, which greatly reduces the amount of steel used and reduces material costs. The application of segmented prestressing technology allows the tower to use lower-strength concrete to meet design conditions, reducing costs and waste of resources. In the transportation link, the prefabricated segmented design makes the size of tower components more flexible, and multiple transportation methods can be selected to reduce transportation costs; the tower is assembled in sections and assembled in sequence, which reduces the requirements for hoisting equipment and reduces the project cost, with good economic benefits.

[0037] In general, the segmental prefabricated prestressed concrete tower with combined vertical connection adopts segmented prestressing technology and prefabricated segmented production methods. The vertical connection between the upper and lower sections adopts the method of combined connection of steel pipe mortise and tenon and bent bolts, which gives full play to the advantages of concrete materials and prestressing technology, and has the advantages of good durability, high bearing capacity, good stability, high overall rigidity and simple construction. All parts of the tower can be produced in a standardized manner in the factory and then transported to the construction site for assembly, which significantly improves construction efficiency and has high economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is an overall schematic diagram of a segmental prefabricated prestressed concrete tower tube with combined vertical connections according to the present invention.

[0039] Figure 2 It is an overall schematic diagram of the prefabricated prestressed concrete ring segment in the present invention.

[0040] Figure 3 It is a schematic diagram of the steel pipe mortise and tenon groove at the top of the prefabricated prestressed concrete ring segment in the present invention.

[0041] Figure 4 It is a schematic diagram of the steel pipe tenon after the prefabricated prestressed concrete ring segment in the present invention is inverted.

[0042] Figure 5 It is a schematic diagram of the annular connection of prefabricated prestressed concrete ring pieces in the present invention.

[0043] Figure 6 It is a schematic diagram of the vertical connection of prefabricated prestressed concrete ring segments in the present invention.

[0044] Figure 7 It is a partial schematic diagram of the combined vertical connection adopted in the present invention.

[0045] Figure 8 It is a structural schematic diagram of the top plate in the present invention. DETAILED DESCRIPTION

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] like Figures 1 to 8 As shown, an embodiment of the present invention provides a segmented prefabricated prestressed concrete tower and construction method using combined vertical connections, wherein the tower body 1 is assembled along the axial direction from a plurality of barrel segments 2 connected by combined vertical connections 3. From low to high along the barrel height direction of the barrel body 1, the diameter of each barrel segment 2 decreases. It is easy to understand that in the present invention, "axial direction" refers to the barrel height direction. Therefore, the upper and lower ends of the present invention refer to the up and down directions along the barrel height direction, and the left and right ends also refer to the left and right directions along the barrel height direction.

[0051] For a single barrel section 2, it is assembled along the annular direction by fastening and connecting a plurality of prefabricated prestressed concrete ring segments 15 through bent bolts 52.

[0052] refer to Figure 7 The combined vertical connection 3 of the present invention is mainly composed of a steel pipe mortise and tenon 4 and a bent bolt 51. The steel pipe mortise and tenon 4 is arranged on the upper and lower end surfaces of the precast prestressed concrete ring segment 15, and the bent bolt 51 also connects adjacent precast prestressed concrete ring segments 15 from the upper and lower end surfaces of the precast prestressed concrete ring segment 15.

[0053] According to the above structure, the prefabricated prestressed concrete ring 15 of the present invention uses prestressing technology to apply prestress to the outer concrete, so that the concrete is in a compressed state, which greatly inhibits the generation and development of cracks and improves the impermeability and durability of the structure. The vertical connection between the upper and lower adjacent cylinder sections 2 adopts a combined connection method of steel pipe mortise and tenon 4 and bent bolt 51, which can efficiently transmit various complex loads and greatly enhance the overall strength and stability of the tower.

[0054] The combined vertical connection 3 of the present invention is mainly composed of a steel tube mortise and tenon 4 and a bent bolt 51, wherein the steel tube mortise and tenon 4 realizes direct transmission of axial pressure and shear force, disperses node stress concentration, and the bent bolt 51 provides normal pressure on the contact interface between the upper and lower tube sections with a preload force, enhances the friction damping of the contact surface, and simultaneously utilizes the deformation of the bending section to absorb dynamic load energy. The two form a composite force transmission path of "rigid interlocking + flexible damping", which synergistically enhances the overall strength and stability of the tower.

[0055] The steel pipe tenon 4 of the present invention is mainly composed of a steel pipe tenon 6, a steel pipe tenon groove 7 and a high-strength concrete 8. The steel pipe tenon 6 can be arranged on the upper end face or the lower end face of the precast prestressed concrete ring piece 15. Correspondingly, the steel pipe tenon groove 7 should be arranged on the lower end face or the upper end face of the precast prestressed concrete ring piece 15, and the steel pipe tenon 6 and the steel pipe tenon groove 7 correspond one to one. In the embodiment of the present invention, the steel pipe tenon 6 is arranged on the upper end face, and the steel pipe tenon groove 7 is arranged on the lower end face. After the steel pipe tenons 6 and the steel pipe tenon groove 7 of the upper and lower precast prestressed concrete ring pieces 15 are mortised, the high-strength concrete 8 is poured to achieve a tight connection. Obviously, a precast prestressed concrete ring piece 15 should generally be provided with a plurality of steel pipe tenons 6 and steel pipe tenons 7 to achieve a reliable connection.

[0056] The steel pipe tenon 6 is mainly welded by a square steel pipe 9, a perforated steel plate 10 and a top plate 11, wherein the square steel pipe 9 is buried in the lower end of the precast prestressed concrete ring piece 15 along the tube height direction, and the lower end head is exposed. The top plate 11 is welded to the lower end of the square steel pipe 9, and the perforated steel plate 10 is welded around the outer side of the exposed part of the lower end head. A reserved hole 121 can be set on the top plate 11 for the precast prestressed concrete ring piece 15 to arrange the prestressed tendons, and the reserved hole 121 is preferably located at the center of the top plate 11. The upper end of the square steel pipe 9 can be provided with an end plate, or it can be not provided. When it is provided, it obviously also affects the corresponding provision of the reserved hole.

[0057] The steel pipe mortise and tenon 7 is mainly composed of a square steel pipe 13 and a bottom plate 14. The square steel pipe 13 is buried in the upper end of the precast prestressed concrete ring piece 15 along the cylinder height direction and is flush with the end surface. The bottom plate 14 is welded to the lower end of the square steel pipe 13. A reserved hole 122 can be provided on the bottom plate 14 for the precast prestressed concrete ring piece 15 to arrange the prestressed tendons. The reserved hole 122 is preferably located at the center of the bottom plate 14.

[0058] Obviously, the size of square steel tube 1 9 should be smaller than that of square steel tube 2 13 , but its size after welding with perforated steel plate 10 is slightly smaller than that of square steel tube 2 13 , so that the steel tube tenon 6 can be inserted into the steel tube tenon groove 7 and realize effective mortise and tenon connection.

[0059] The bolt holes 181 of the present invention are arranged at the upper and lower ends of each precast prestressed concrete ring segment 15. The bolt holes 181 at the upper end penetrate the upper end face and the inner side face or the outer side face of the precast prestressed concrete ring segment 15, and the bolt holes 181 at the lower end penetrate the lower end face and the inner side face or the outer side face of the precast prestressed concrete ring segment 15. The present invention preferably penetrates the inner side face. Thus, by passing the bent bolts 51 through the bolt holes 181 of the upper and lower adjacent precast prestressed concrete ring segments 15, the connection of the upper and lower adjacent precast prestressed concrete ring segments 15 can be achieved.

[0060] In order to better exert the synergistic effect of the bent bolt 51 and the steel pipe tenon 4, in the present invention, the bolt hole 181 is matched with the steel pipe tenon 4 one by one, and one bolt hole 181 is in the same radial direction as one steel pipe tenon 4. Specifically, the bolt hole 181 can be arranged in the inner direction of the steel pipe tenon groove 7 and the inner direction of the steel pipe tenon 6. Preferably, each bolt hole 181 is evenly spaced along the circumferential direction.

[0061] The precast prestressed concrete ring segment 15 of the present invention is mainly composed of a precast concrete ring segment 16 and prestressed tendons stretched in the precast concrete ring segment 16. Among them, bolt holes 182 are arranged at both ends of the left and right ends of the precast concrete ring segment 16. The bolt hole 182 at the left end penetrates the left end face and the inner side or outer side of the precast prestressed concrete ring segment 15, and the bolt hole 182 at the right end penetrates the right end face and the inner side or outer side of the precast prestressed concrete ring segment 15. The present invention preferably penetrates the inner side. Thus, the bolt holes 182 of the left and right adjacent precast prestressed concrete ring segments 15 are passed through by bolts 182 to achieve the connection of the left and right adjacent precast prestressed concrete ring segments 15. Preferably, each bolt hole 182 is evenly spaced along the axial direction.

[0062] The precast concrete ring piece 16 of the present invention is mainly composed of concrete 17, steel mesh and prestressed tendon pipe 19, wherein the prestressed tendon pipe 19 is buried along the tube height direction, and is used to pass through the prestressed tendon. The prestressed tendon preferably corresponds to the steel pipe mortise and tenon 4 in the height direction. At this time, the steel pipe mortise and tenon 4 is provided with a reserved hole for the prestressed tendon to pass through, that is, the aforementioned reserved hole 121 and reserved hole 2 122.

[0063] During construction, the precast concrete ring segment 16 is pre-embedded with the steel pipe tenon 6 and the steel pipe tenon groove 7 before pouring. The steel pipe tenon 6 and the steel pipe tenon groove 7 are aligned along the tube height direction. The steel pipe tenon 6 is located at the bottom of the precast concrete ring segment 16, and the steel pipe tenon groove 7 is located at the top of the precast concrete ring segment 16. The prestressed tendon pipe 19 is aligned with the reserved hole 12 to ensure that the prestressed tendon can pass through the hole to achieve tensioning.

[0064] In a specific embodiment of the present invention, reference Figure 1 Each cylinder section 2 is formed by 4 prefabricated prestressed concrete ring pieces 15 connected in a circumferential direction by bent bolts 52, and the upper and lower adjacent cylinder sections 2 are connected and assembled by a combined vertical connection 3. Figure 6 The prefabricated prestressed concrete ring segments 15 are staggered in the direction of the cylinder height. At this time, the upper and lower adjacent cylinder sections 2 are staggered, thereby improving the integrity of the structure.

[0065] The specific construction method of the complete structure of the present invention is:

[0066] 1) In the factory, a steel plate is perforated to make a perforated steel plate 10, and a top plate 11 and a bottom plate 14 are made. The top plate 11 with a reserved hole 121 is welded to one end of a square steel tube 9, and the perforated steel plate 10 is welded around the outside of the other end to obtain a steel tube tenon 6. The bottom plate 14 with a reserved hole 122 is welded to one end of a square steel tube 13 to obtain a steel tube tenon groove 7.

[0067] 2) In the factory, the steel mesh, the steel pipe tenon 6 and the steel pipe tenon groove 7 are installed in the template of the precast concrete ring segment 16, the positions of the bolt hole 181, the bolt hole 2 182 and the prestressed tendon pipe 19 are reserved, and the concrete 17 is poured to complete the production of the precast concrete ring segment 16.

[0068] 3) In the factory, the prestressed tendons are passed through the prestressed tendon pipe 19 and the steel pipe mortise and tenon 4 and tensioned to complete the construction of the prefabricated prestressed concrete ring segment 15.

[0069] 4) In the factory or on site, the prefabricated prestressed concrete ring segment 15 is connected to a cylinder segment 2 along the annular direction using bent bolts 52, and the above splicing operation is repeated to obtain a plurality of cylinder segments 2.

[0070] 5) On site, axially align each cylinder segment 2 through the steel pipe tenon 6 and insert it into the steel pipe tenon groove 7. Preferably, prefabricated prestressed concrete ring pieces 15 are staggered in the axial direction, and high-strength concrete 8 is filled in the steel pipe tenon groove 7 to complete the construction of the steel pipe tenon joint 4. Bent bolts 51 are used to connect the upper and lower adjacent cylinder segments 2 to complete the connection between the cylinder segments 2.

[0071] In summary, the present invention provides a segmental prefabricated prestressed concrete tower using combined vertical connection and a construction method, including a segmental prefabricated prestressed concrete cylinder body using combined vertical connection, the cylinder body is assembled by a plurality of cylinder segments in the vertical direction through a combination of steel pipe tenons and bent bolts, and the cylinder segments decrease in diameter upward along the height direction, and each cylinder segment is assembled by a plurality of prefabricated prestressed concrete ring pieces in the circumferential direction through bent bolts. The steel pipe tenon consists of a steel pipe tenon, a steel pipe tenon groove and high-strength concrete, the steel pipe tenon and the steel pipe tenon groove are pre-buried on the outside of the prefabricated concrete ring piece, the prestressed tendons pass through the steel pipe tenon to tension the prestress, and the bolt holes are arranged on the inside of the prefabricated concrete ring piece at the corresponding position of the steel pipe tenon. The present invention adopts a combination of steel pipe tenons and bent bolts to connect the upper and lower cylinder segments, thereby improving the connection strength and construction efficiency; prestress is applied to each ring piece of the tower, thereby improving the safety and durability of the structure and reducing the production cost; the prefabricated prestressed concrete ring piece is standardized in the factory, thereby ensuring the construction quality, improving the production efficiency, and having a broad prospect for engineering application.

[0072] 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 segmental prefabricated prestressed concrete tower using combined vertical connections, characterized in that: The invention comprises a barrel (1), wherein the barrel (1) is composed of a plurality of tubular barrel sections (2) connected and assembled via a combined vertical connection structure (3) along the axial direction, and the diameter of each barrel section (2) decreases from the bottom to the top; the combined vertical connection structure (3) comprises a steel pipe mortise and tenon joint (4) and a bent bolt (51); Each of the cylinder sections (2) is assembled along the annular direction by fastening and connecting a plurality of prefabricated prestressed concrete ring pieces (15) through two bent bolts (52).

2. The segmental prefabricated prestressed concrete tower with combined vertical connection according to claim 1 is characterized in that: The steel pipe tenon (4) comprises a steel pipe tenon (6) and a steel pipe tenon groove (7); the steel pipe tenon (6) is arranged on the upper end face or the lower end face of the prefabricated prestressed concrete ring piece (15), and the steel pipe tenon groove (7) is arranged on the lower end face or the upper end face of the prefabricated prestressed concrete ring piece (15); the steel pipe tenon (6) corresponds to the steel pipe tenon groove (7) one by one, and the upper and lower adjacent prefabricated prestressed concrete ring pieces (15) are connected in a tenon-and-mortise connection manner.

3. The segmented prefabricated prestressed concrete tower with combined vertical connections according to claim 2 is characterized in that: The steel pipe tenon (6) is composed of a square steel pipe (9), a perforated steel plate (10) and a top plate (11); the square steel pipe (9) is buried in the precast prestressed concrete ring piece (15) along the tube height direction and the end is exposed; the perforated steel plate (10) is welded around the outer side of the exposed end of the square steel pipe (9); the top plate (11) is welded to the end of the square steel pipe (9) close to one end of the precast prestressed concrete ring piece (15), and a reserved hole (121) is provided on the top plate (11); The steel pipe mortise and tenon (7) is composed of a second square steel pipe (13) and a bottom plate (14); the second square steel pipe (13) is buried in the precast prestressed concrete ring piece (15) along the cylinder height direction and is flush with the end surface; the bottom plate (14) is welded to one end of the second square steel pipe (13) close to the precast prestressed concrete ring piece (15), and a second reserved hole (122) is provided on the bottom plate (14).

4. The segmental prefabricated prestressed concrete tower with combined vertical connection according to claim 3 is characterized in that: The size of the square steel pipe one (9) is smaller than that of the square steel pipe two (13), and the size after welding the perforated steel plate (10) is slightly smaller than that of the square steel pipe two (13). The steel pipe tenon (6) is inserted into the steel pipe tenon groove (7), and then filled with high-strength concrete (8) to achieve connection.

5. The segmental prefabricated prestressed concrete tower with combined vertical connection according to claim 1, 2, 3 or 4, characterized in that: The upper and lower ends of each of the prefabricated prestressed concrete ring pieces (15) are provided with bolt holes (181), and the bolt holes (181) at the upper and lower ends respectively penetrate: The upper end surface and the inner side surface or the outer side surface of the prefabricated prestressed concrete ring piece (15), and The lower end surface and the inner side surface or the outer side surface of the prefabricated prestressed concrete ring piece (15); The bent bolt (51) passes through the bolt hole (181) of the upper and lower adjacent prefabricated prestressed concrete ring pieces (15) to achieve connection.

6. The segmental prefabricated prestressed concrete tower with combined vertical connection according to claim 5, characterized in that: The bolt holes (181) correspond to the steel pipe mortise and tenon (4) one by one, and one bolt hole (181) and one steel pipe mortise and tenon (4) are in the same radial direction.

7. The segmental prefabricated prestressed concrete tower with combined vertical connections according to claim 1, characterized in that: The prefabricated prestressed concrete ring piece (15) comprises a prefabricated concrete ring piece (16) and a prestressed tendon stretched in the prefabricated concrete ring piece (16). Two bolt holes (182) are arranged at the left and right ends of the prefabricated concrete ring piece (15). The two bolt holes (182) at the left and right ends respectively penetrate: The left end face and the inner side face or the outer side face of the prefabricated prestressed concrete ring piece (15), and The right end face and the inner side face or the outer side face of the prefabricated prestressed concrete ring piece (15); The second bent bolt (52) passes through the second bolt hole (182) of the left and right adjacent prefabricated prestressed concrete ring pieces (15) to achieve connection.

8. The segmental prefabricated prestressed concrete tower with combined vertical connections according to claim 1, characterized in that: The prefabricated concrete ring piece (16) is composed of concrete (17), a steel mesh and a prestressed tendon pipe (19). The prestressed tendon pipe (19) is buried along the cylinder height direction and is used to tension prestressed tendons. The prestressed tendons correspond to the steel pipe mortise and tenon (4). The steel pipe mortise and tenon (4) is provided with a reserved hole for the prestressed tendons to pass through. The prefabricated prestressed concrete ring pieces (15) are staggered in the cylinder height direction.

9. The construction method of the segmental prefabricated prestressed concrete tower tube using combined vertical connections as claimed in claim 1 is characterized in that: Here are the steps: Step 1), in a factory, a prefabricated prestressed concrete ring piece (15) is manufactured, and steel pipe mortise and tenon joints (4) are installed at the upper and lower ends thereof, and a bolt hole (181) for connection with a bent bolt (51) is reserved, and bolt holes (182) for connection with a bent bolt (52) are reserved at the left and right ends; Step 2), in a factory or on site, using bent bolts (52) to connect the prefabricated prestressed concrete ring segments (15) to obtain a cylinder segment (2); Step 3), on site, use the combined vertical connection structure (3) to connect and assemble the cylinder sections (2) to complete the construction.

10. The construction method according to claim 9, characterized in that: The prefabricated prestressed concrete ring piece (15) is manufactured as follows: Step 11), a top plate (11) with a reserved hole (121) is welded to one end of the square steel tube (9), and a perforated steel plate (10) is welded around the outside of the other end to obtain a steel tube tenon (6); a bottom plate (14) with a reserved hole (122) is welded to one end of the square steel tube (13) to obtain a steel tube tenon groove (7); Step 12), installing the steel mesh, the steel pipe tenon (6) and the steel pipe tenon groove (7) in the template of the precast concrete ring piece (16), reserving the positions of the bolt hole 1 (181), the bolt hole 2 (182) and the prestressed tendon pipe (19), pouring concrete (17), and obtaining the precast concrete ring piece (16); Step 13), passing the prestressed tendons through the prestressed tendon pipeline (19), completing the tensioning of the prestressed tendons, and obtaining the prefabricated prestressed concrete ring piece (15).

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