Prestressed and non-prestressed mixed structure reinforced concrete pole and preparation method

Abstract

The invention relates to the related technical field of reinforced concrete electric poles, in particular to a prestressed and non-prestressed mixed structure reinforced concrete electric pole and a preparation method thereof.The prestressed and non-prestressed mixed structure reinforced concrete electric pole comprises a lower pier head, an upper pier head and a reinforced concrete electric pole body, and the upper pier head and the lower pier head are located on the upper side and the lower side of the reinforced concrete electric pole body respectively; the lower pier head, the upper pier head and the reinforced concrete electric pole body are integrally formed in a pouring mode, and the reinforced concrete electric pole body comprises an inner cage body, an outer cage body and a concrete body. A reinforced concrete electric pole main body is formed by combining an inner cage body, an outer cage body and a concrete main body, the inner cage body is formed by combining a middle-position reinforcing steel bar, a lower-position reinforcing steel bar, an upper-position reinforcing steel bar and an inner side positioning ring, and the outer cage body is formed by combining a steel strong wire and an outer side positioning ring; the inner cage body is provided with the non-prestressed tendons, and the outer cage body is provided with the prestressed tendons, so that the ductility and toughness of the reinforced concrete electric pole can be improved while the crack resistance of the reinforced concrete electric pole is ensured.

Description

Technical Field

[0001] This invention relates to the technical field of reinforced concrete poles, specifically to a prestressed and non-prestressed hybrid reinforced concrete pole and its preparation method. Background Technology

[0002] Reinforced concrete poles are poles made of concrete and reinforcing steel bars or wires; prestressed concrete poles are the most widely used type of reinforced concrete pole, and are widely used in power, telecommunications, railway and other fields. Fully prestressed poles have good crack resistance but poor ductility, while ordinary reinforced concrete poles have good ductility but are prone to cracking. Partially prestressed concrete poles aim to combine the advantages of both, by simultaneously incorporating prestressed and non-prestressed tendons, thus improving ductility and toughness while ensuring crack resistance.

[0003] A Chinese patent document with publication number CN207944767U discloses a prestressed concrete pole. The design includes a pole body comprising a first pole, a fixing mechanism, and a second pole, distributed from top to bottom. The first pole and the second pole are fixedly connected by the fixing mechanism. The first pole has a first cavity, and the second pole has a second cavity. The fixing mechanism includes a circular connecting plate, a first support rod, a second support rod, a first cylindrical fixing plate, and a second cylindrical fixing plate disposed between the first pole and the second pole. The first support rod is fixed at the center of the upper surface of the connecting plate, and the second support rod is fixed at the center of the lower surface of the connecting plate. The first cylindrical fixing plate is fixed at the edge of the upper surface of the connecting plate, and the second cylindrical fixing plate is fixed at the edge of the lower surface of the connecting plate. The first support rod is located within the first cavity, and the second support rod is located within the second cavity. The first pole and the first cylindrical fixing plate are fixedly connected by bolts, and the second pole and the second cylindrical fixing plate are fixedly connected by bolts. However, the above-mentioned schemes and existing technologies for prestressed poles have the following prominent problems in practical applications: First, the ratio and spatial layout of non-prestressed and prestressed tendons lack coordinated design, often resulting in insufficient contribution of non-prestressed tendons in areas with large bending moments (such as 1 / 3 to 1 / 2 of the pole length from the support point), leading to cracks exceeding the specification limits after tensioning or in the early stages of service, affecting durability. Second, existing designs do not fully utilize the synergistic working mechanism of the two types of reinforcement under ultimate loads. Non-prestressed tendons are mostly configured according to structural requirements, failing to effectively enhance the overall ductility and seismic energy dissipation capacity of the pole. Finally, in terms of production process, existing methods struggle to accurately and stably position the two types of reinforcement within narrow molds, especially addressing the end anchorage and mid-section anti-sagging issues of non-prestressed tendons, resulting in unstable product quality and low production efficiency. Therefore, this invention proposes a prestressed and non-prestressed hybrid reinforced concrete pole and its preparation method to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a prestressed and non-prestressed hybrid reinforced concrete pole and its preparation method, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a prestressed and non-prestressed hybrid reinforced concrete pole, comprising: lower pier head; upper pier head; The main body of the reinforced concrete pole, wherein the upper pier and the lower pier are located on the upper and lower sides of the main body of the reinforced concrete pole, respectively, and the lower pier, the upper pier, and the main body of the reinforced concrete pole are integrally cast. The main body of the reinforced concrete pole includes an inner cage, an outer cage, and a concrete main body. The inner cage is set inside the cavity of the outer cage, and both the inner cage and the outer cage are embedded in the concrete main body. The upper and lower ends of the inner cage and the outer cage are respectively fixedly connected to the upper and lower support heads.

[0006] Preferably, the diameter of the lower pier head is 350mm, the diameter of the upper pier head is 190mm, the overall length of the prestressed and non-prestressed mixed structure reinforced concrete pole is 15m, and the prestressed and non-prestressed mixed structure reinforced concrete pole is arranged in a tower shape.

[0007] Preferably, the inner cage includes a middle reinforcing bar, a lower reinforcing bar, an upper reinforcing bar, and an inner positioning ring. The middle, lower, and upper reinforcing bars are pre-positioned by a positioning structure, which includes a middle positioning structure, a lower positioning structure, and an upper positioning structure. The middle part of the middle reinforcing bar, the upper end of the lower reinforcing bar, and the lower end of the upper reinforcing bar are positioned and fixed by the middle positioning structure. The lower end of the middle reinforcing bar and the middle part of the lower reinforcing bar are positioned and fixed by the lower positioning structure. The upper end of the middle reinforcing bar and the middle part of the upper reinforcing bar are positioned by the upper positioning structure. The inner positioning ring is sleeved on the middle, lower, and upper reinforcing bars, and the middle, lower, and upper reinforcing bars are welded to the inner positioning ring. All the middle, lower, and upper reinforcing bars are threaded steel bars.

[0008] Preferably, the center positioning structure includes a primary positioning ring, a secondary positioning ring, a positioning bolt, and a positioning nut. The primary positioning ring has a primary mounting hole and a primary positioning hole, and the secondary positioning ring has a secondary mounting hole and a secondary positioning hole. The primary mounting holes and secondary mounting holes are correspondingly arranged, and the screw of the positioning bolt passes through the primary mounting hole and the secondary mounting hole. The primary positioning ring and the secondary positioning ring are positioned by the positioning bolt and the positioning nut. The center reinforcing bar, the lower reinforcing bar, and the upper reinforcing bar are all positioned by the primary positioning hole and the secondary positioning hole.

[0009] Preferably, both the primary and secondary positioning holes are arc-shaped grooves, the outer ends of the primary and secondary mounting holes are circular, and the inner ends of the primary and secondary mounting holes are arc-shaped grooves. The screw size of the positioning bolt matches the size of the primary and secondary mounting holes. When the positioning bolt and positioning nut are actually tightened, the primary and secondary mounting holes are aligned with each other, and the sidewalls of the middle, lower, and upper reinforcing bars abut against the sidewalls of the corresponding primary and secondary positioning holes.

[0010] Preferably, the structures of the lower positioning structure and the upper positioning structure are the same as those of the middle positioning structure, and the dimensions of the lower positioning structure, the middle positioning structure, and the upper positioning structure are arranged in a decreasing trend.

[0011] Preferably, the outer cage includes a steel reinforcing wire and an outer positioning ring. The steel reinforcing wire is arranged in a circle around the outer side of the inner cage. The outer positioning ring is a variable pitch spiral hoop, and the outer positioning ring is tied and fixed to the steel reinforcing wire by steel wire.

[0012] Preferably, the middle positioning structure, the lower positioning structure, and the upper positioning structure all have a positioning seat integrally formed on the side wall of the secondary positioning ring. The positioning seat has a steel wire positioning groove, and the steel wire is stuck in the steel wire positioning groove.

[0013] Preferably, a locking groove is provided at the outer port of the primary mounting hole, and a locking post is integrally formed on the inner side of the nut of the positioning bolt. The locking post is correspondingly provided with the locking groove. A locking opening is provided on the outer port of the secondary mounting hole on the secondary positioning ring. The locking opening is a groove structure with a circular bottom and an arc-shaped opening at the port. The port of the locking opening is flush with the end face of the secondary positioning ring in a clockwise direction. A movable rod groove is provided on the inner end face of the positioning nut. A movable rod is movably installed in the movable rod groove. The inner end of the movable rod is connected to the bottom of the movable rod groove through a return spring. When the return spring is in the return state, the end of the movable rod protrudes outside the movable rod groove. When the return spring is compressed, the movable rod is completely retracted into the movable rod groove. When the positioning nut and the positioning bolt are actually installed, the locking post is engaged in the locking groove, and the movable rod is inserted into the bottom surface of the locking opening.

[0014] A method for preparing a prestressed and non-prestressed hybrid reinforced concrete pole, characterized in that: the method for preparing the prestressed and non-prestressed hybrid reinforced concrete pole is used to prepare any one of the prestressed and non-prestressed hybrid reinforced concrete poles according to claims 3-9, and the method includes the following steps: S1. Mold preparation: Clean and apply release agent to the inner wall of the centrifugal forming mold for the pole; S2. Position and install the inner and outer cages in the centrifugal forming mold of the pole. Position the non-prestressed tendons according to the segmented variable density requirements. In the high-density area, use a detachable magnetic locator to temporarily fix the outer positioning ring in the predetermined position inside the prestressed tendon. Then tie the outer positioning ring to the steel wire. S3. The designed concrete mixture is poured into a mold containing a steel reinforcement cage. After the mold is closed, it is centrifugally rotated at high speed. Under the action of centrifugal force, the concrete is compacted and some water is released. At the same time, the non-prestressed tendons are pressed against the inner wall of the mold under the action of centrifugal force, and their positions are initially fixed. S4. Steam curing and demolding: The mold after centrifugation is steam cured at normal pressure. After the concrete reaches the demolding strength, the tension is removed and the concrete is demolded. During the demolding process, the slight slippage of the non-prestressed tendons in the concrete is restricted by the shallow positioning groove, thereby ensuring the accuracy of its final design position. S5. Post-processing: The electric pole is cured after demolding, and the shallow positioning groove is formed naturally after curing.

[0015] Compared with the prior art, the beneficial effects of the present invention are: By constructing a prestressed and non-prestressed hybrid reinforced concrete pole, consisting of a lower pier head, an upper pier head, and a reinforced concrete pole body, and by configuring the reinforced concrete pole body as an inner cage, an outer cage, and a concrete main body, with the inner cage composed of a middle reinforcing bar, a lower reinforcing bar, an upper reinforcing bar, and an inner positioning ring, and the outer cage composed of steel reinforcing wire and an outer positioning ring, non-prestressed tendons are configured in the inner cage, and prestressed tendons are configured in the outer cage. This ensures the crack resistance of the reinforced concrete pole while also improving its ductility and toughness. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal steel reinforcement structure distribution of the present invention; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 This is a schematic diagram of the inner cage structure of the present invention; Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point B; Figure 6 This is a schematic diagram showing the distribution of the middle, lower, and upper reinforcing bars in this invention. Figure 7 This is a schematic diagram of the outer cage structure of the present invention; Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point C; Figure 9 This is a schematic diagram of the mid-positioning structure of the present invention; Figure 10 for Figure 9 Enlarged schematic diagram of the structure at point D; Figure 11 for Figure 9 Enlarged schematic diagram of the structure at point E in the middle; Figure 12 for Figure 11 Enlarged schematic diagram of the structure at point F; Figure 13 This is a schematic diagram of the outer structure of the primary positioning ring of the present invention; Figure 14 for Figure 13 Enlarged schematic diagram of the structure at point G in the middle; Figure 15 This is a schematic diagram of the inner structure of the primary positioning ring of the present invention; Figure 16 for Figure 15 Enlarged schematic diagram of the structure at point H; Figure 17This is a schematic diagram of the positioning bolt and positioning nut of the present invention; Figure 18 This is a schematic diagram showing the position distribution of the movable rod in this invention.

[0017] In the diagram: 1. Lower pier head; 2. Upper pier head; 3. Reinforced concrete pole body; 4. Inner cage; 5. Outer cage; 6. Middle reinforcement bar; 7. Lower reinforcement bar; 8. Upper reinforcement bar; 9. Inner positioning ring; 10. Steel reinforcing wire; 11. Outer positioning ring; 12. Middle positioning structure; 13. Lower positioning structure; 14. Upper positioning structure; 15. Primary positioning ring; 16. Secondary positioning ring; 17. Positioning bolt; 18. Positioning nut; 19. Primary mounting hole; 20. Secondary mounting hole; 21. Primary positioning hole; 22. Secondary positioning hole; 23. Positioning seat; 24. Engaging groove; 25. Engaging column; 26. Engaging opening; 27. Movable rod. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-18 The present invention provides the following three preferred embodiments: Example 1: A prestressed and non-prestressed hybrid reinforced concrete pole includes a lower pier 1, an upper pier 2, and a reinforced concrete pole body 3. The upper pier 2 and lower pier 1 are located on the upper and lower sides of the reinforced concrete pole body 3, respectively, and the lower pier 1, upper pier 2, and reinforced concrete pole body 3 are integrally cast. The reinforced concrete pole body 3 includes an inner cage 4, an outer cage 5, and a concrete main body. The inner cage 4 is set in the inner cavity of the outer cage 5, and both the inner cage 4 and outer cage 5 are pre-embedded in the concrete main body. The upper and lower ends of the inner cage 4 and outer cage 5 are fixedly connected to the upper pier 2 and lower pier 1, respectively. The diameter of the lower pier 1 is 350mm, the diameter of the upper pier 2 is 190mm, and the overall length of the prestressed and non-prestressed hybrid reinforced concrete pole is 15m. The prestressed and non-prestressed hybrid reinforced concrete pole is arranged in a tower shape.

[0020] The inner cage 4 includes a middle reinforcing bar 6, a lower reinforcing bar 7, an upper reinforcing bar 8, and an inner positioning ring 9. The middle reinforcing bar 6, lower reinforcing bar 7, and upper reinforcing bar 8 are pre-positioned by a positioning structure, which includes a middle positioning structure 12, a lower positioning structure 13, and an upper positioning structure 14. The middle part of the middle reinforcing bar 6, the upper end of the lower reinforcing bar 7, and the lower end of the upper reinforcing bar 8 are positioned and fixed by the middle positioning structure 12. The lower end of the middle reinforcing bar 6 and the middle part of the lower reinforcing bar 7 are positioned and fixed by the lower positioning structure 13. The upper end of the middle reinforcing bar 6 and the middle part of the upper reinforcing bar 8 are positioned by the upper positioning structure 14. The inner positioning ring 9 is sleeved on the middle reinforcing bar 6, lower reinforcing bar 7, and upper reinforcing bar 8. The connection between the middle reinforcing bar 6 and the inner positioning ring 9 is welded. The middle reinforcing bar 6, the lower reinforcing bar 7, and the upper reinforcing bar 8 are all threaded steel bars. The middle positioning structure 12 includes a primary positioning ring 15, a secondary positioning ring 16, a positioning bolt 17, and a positioning nut 18. The primary positioning ring 15 has a primary mounting hole 19 and a primary positioning hole 21. The secondary positioning ring 16 has a secondary mounting hole 20 and a secondary positioning hole 22. The primary mounting hole 19 and the secondary mounting hole 20 are correspondingly set, and the screw of the positioning bolt 17 passes through the primary mounting hole 19 and the secondary mounting hole 20. The primary positioning ring 15 and the secondary positioning ring 16 are positioned by the positioning bolt 17 and the positioning nut 18. The middle reinforcing bar 6, the lower reinforcing bar 7, and the upper reinforcing bar 8 are all positioned by the primary positioning hole 21 and the secondary positioning hole 22.

[0021] Both the primary positioning hole 21 and the secondary positioning hole 22 are arc-shaped grooves. The outer ends of the primary mounting hole 19 and the secondary mounting hole 20 are circular, and the inner ends of the primary mounting hole 19 and the secondary mounting hole 20 are arc-shaped grooves. This design allows the positioning bolt 17 to pass through the primary mounting hole 19 and the secondary mounting hole 20 at an inclined angle. When the positioning bolt 17 and the positioning nut 18 are actually tightened, the primary positioning hole 21 and the secondary positioning hole 22 can be misaligned to position the reinforcing bar. The screw size of 7 matches the size of the primary mounting hole 19 and the secondary mounting hole 20. When the positioning bolt 17 and the positioning nut 18 are actually tightened, the primary mounting hole 19 and the secondary mounting hole 20 are aligned with each other, and the side walls of the middle reinforcing bar 6, the lower reinforcing bar 7 and the upper reinforcing bar 8 are all abutted against the side walls of the corresponding primary positioning hole 21 and the secondary positioning hole 22, so as to facilitate the synchronous positioning of the middle reinforcing bar 6, the lower reinforcing bar 7 and the upper reinforcing bar 8 through the primary positioning ring 15 and the secondary positioning ring 16.

[0022] The structures of the lower positioning structure 13 and the upper positioning structure 14 are the same as those of the middle positioning structure 12, and the dimensions of the lower positioning structure 13, the middle positioning structure 12, and the upper positioning structure 14 are set in a decreasing trend.

[0023] The outer cage 5 includes a steel reinforcing wire 10 and an outer positioning ring 11. The steel reinforcing wire 10 is arranged in a circle around the outer side of the inner cage 4. The outer positioning ring 11 is a variable pitch spiral stirrup, and the outer positioning ring 11 and the steel reinforcing wire 10 are tied and fixed together by steel wire. By setting up a prestressed and non-prestressed mixed structure reinforced concrete pole composed of a lower pier head 1, an upper pier head 2 and a reinforced concrete pole body 3, and setting the reinforced concrete pole body 3 to be composed of an inner cage 4, an outer cage 5 and a concrete body, the inner cage 4 is set to be composed of a middle reinforcing bar 6, a lower reinforcing bar 7, an upper reinforcing bar 8 and an inner positioning ring 9, and the outer cage 5 is set to be composed of a steel reinforcing wire 10 and an outer positioning ring 11, the inner cage 4 is equipped with non-prestressed tendons and the outer cage 5 is equipped with prestressed tendons, thereby ensuring the crack resistance of the reinforced concrete pole while also improving the ductility and toughness of the reinforced concrete pole.

[0024] Positioning seats 23 are integrally formed on the side walls of the secondary positioning rings 16 of the middle positioning structure 12, the lower positioning structure 13, and the upper positioning structure 14. The positioning seats 23 are provided with steel wire positioning grooves, and the steel wires 10 are stuck in the steel wire positioning grooves. The positioning seats 23 can facilitate the pre-positioning of the outer cage 5.

[0025] In Example 2, based on Example 1, a locking groove 24 is provided at the outer port of the primary mounting hole 19. A locking post 25 is integrally formed on the inner side of the nut of the positioning bolt 17. The locking post 25 is correspondingly set with the locking groove 24. A locking opening 26 is provided on the secondary positioning ring 16 at the outer port of the secondary mounting hole 20. The locking opening 26 is a groove structure with a circular bottom and an arc-shaped opening at the port. The port of the locking opening 26 is flush with the end face of the secondary positioning ring 16 in a clockwise direction. A movable rod groove is provided on the inner end face of the positioning nut 18. A movable rod 27 is movably installed in the movable rod groove. The inner end of the movable rod 27 is reset by a return spring. The spring is connected to the bottom of the movable rod groove. When the return spring is in the return state, the end of the movable rod 27 protrudes out of the outside of the movable rod groove. When the return spring is compressed, the movable rod 27 is completely retracted into the movable rod groove. When the positioning nut 18 and the positioning bolt 17 are actually installed, the locking post 25 is locked into the locking groove 24, and the movable rod 27 is inserted into the bottom surface of the locking opening 26. The locking post 25 is locked into the locking groove 24, and the movable rod 27 is inserted into the locking opening 26, thereby preventing the positioning nut 18 and the positioning bolt 17 from loosening. Thus, the overall stability of the inner cage 4 can be guaranteed during the high-speed centrifugal rotation of the mold.

[0026] Example 3, based on Example 2, provides a method for preparing a prestressed and non-prestressed hybrid reinforced concrete pole, characterized in that: the method for preparing the prestressed and non-prestressed hybrid reinforced concrete pole is used to prepare any one of the prestressed and non-prestressed hybrid reinforced concrete poles according to claims 3-9, and the method includes the following steps: S1. Mold preparation: Clean and apply release agent to the inner wall of the centrifugal forming mold for the pole; S2. Position and install the inner cage 4 and outer cage 5 in the centrifugal forming mold of the pole. Position the non-prestressed tendons according to the segmented variable density requirements. In the high-density area, use a detachable magnetic locator to temporarily fix the outer positioning ring 11 to the predetermined position inside the prestressed tendon. Then tie the outer positioning ring 11 to the steel wire 10. S3. The designed concrete mixture is poured into a mold containing a steel reinforcement cage. After the mold is closed, it is centrifugally rotated at high speed. Under the action of centrifugal force, the concrete is compacted and some water is released. At the same time, the non-prestressed tendons are pressed against the inner wall of the mold under the action of centrifugal force, and their positions are initially fixed. S4. Steam curing and demolding: The mold after centrifugation is steam cured at normal pressure. After the concrete reaches the demolding strength, the tension is removed and the concrete is demolded. During the demolding process, the slight slippage of the non-prestressed tendons in the concrete is restricted by the shallow positioning grooves, thereby ensuring the accuracy of its final design position. S5. Post-processing: After demolding, the poles undergo post-curing, and the shallow positioning grooves are naturally formed after curing.

[0027] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A prestressed and non-prestressed hybrid reinforced concrete pole, characterized in that: include: Lower pier head (1); Upper pier head (2); The main body of the reinforced concrete pole (3) has an upper pier (2) and a lower pier (1) located on the upper and lower sides of the main body of the reinforced concrete pole (3), and the lower pier (1), the upper pier (2), and the main body of the reinforced concrete pole (3) are integrally cast. The main body (3) of the reinforced concrete pole includes an inner cage (4), an outer cage (5) and a concrete main body. The inner cage (4) is set in the inner cavity of the outer cage (5), and both the inner cage (4) and the outer cage (5) are embedded in the concrete main body. The upper and lower ends of the inner cage (4) and outer cage (5) are respectively fixedly connected to the upper pier (2) and the lower pier (1).

2. The prestressed and non-prestressed hybrid reinforced concrete pole according to claim 1, characterized in that: The lower pier (1) has a diameter of 350mm, the upper pier (2) has a diameter of 190mm, and the overall length of the prestressed and non-prestressed mixed structure reinforced concrete pole is 15m, and the prestressed and non-prestressed mixed structure reinforced concrete pole is set in a tower shape.

3. A prestressed and non-prestressed hybrid reinforced concrete pole according to claim 2, characterized in that: The inner cage (4) includes a middle reinforcing bar (6), a lower reinforcing bar (7), an upper reinforcing bar (8), and an inner positioning ring (9). The middle reinforcing bar (6), the lower reinforcing bar (7), and the upper reinforcing bar (8) are pre-positioned by a positioning structure, which includes a middle positioning structure (12), a lower positioning structure (13), and an upper positioning structure (14). The middle part of the middle reinforcing bar (6), the upper end of the lower reinforcing bar (7), and the lower end of the upper reinforcing bar (8) are positioned and fixed by the middle positioning structure (12). The lower end and the middle of the lower reinforcing bar (7) are positioned and fixed by the lower positioning structure (13). The upper end of the middle reinforcing bar (6) and the middle of the upper reinforcing bar (8) are positioned by the upper positioning structure (14). The inner positioning ring (9) is sleeved on the middle reinforcing bar (6), the lower reinforcing bar (7), and the upper reinforcing bar (8). The middle reinforcing bar (6), the lower reinforcing bar (7), the upper reinforcing bar (8) and the inner positioning ring (9) are welded together. The middle reinforcing bar (6), the lower reinforcing bar (7) and the upper reinforcing bar (8) are all threaded steel bars.

4. A prestressed and non-prestressed hybrid reinforced concrete pole according to claim 3, characterized in that: The mid-positioning structure (12) includes a primary positioning ring (15), a secondary positioning ring (16), a positioning bolt (17), and a positioning nut (18). The primary positioning ring (15) has a primary mounting hole (19) and a primary positioning hole (21). The secondary positioning ring (16) has a secondary mounting hole (20) and a secondary positioning hole (22). The primary mounting hole (19) and the secondary mounting hole (20) are correspondingly set, and the screw of the positioning bolt (17) passes through the primary mounting hole (19) and the secondary mounting hole (20). The primary positioning ring (15) and the secondary positioning ring (16) are positioned by the positioning bolt (17) and the positioning nut (18). The mid-positioning reinforcing bar (6), the lower reinforcing bar (7), and the upper reinforcing bar (8) are all positioned by the primary positioning hole (21) and the secondary positioning hole (22).

5. A prestressed and non-prestressed hybrid reinforced concrete pole according to claim 4, characterized in that: The primary positioning hole (21) and the secondary positioning hole (22) are both arc-shaped grooves. The outer ends of the primary mounting hole (19) and the secondary mounting hole (20) are circular, and the inner ends of the primary mounting hole (19) and the secondary mounting hole (20) are arc-shaped grooves. The screw size of the positioning bolt (17) matches the size of the primary mounting hole (19) and the secondary mounting hole (20). When the positioning bolt (17) and the positioning nut (18) are actually tightened, the primary mounting hole (19) and the secondary mounting hole (20) are aligned with each other. The side walls of the middle reinforcing bar (6), the lower reinforcing bar (7), and the upper reinforcing bar (8) are all abutted against the side walls of the corresponding primary positioning hole (21) and the secondary positioning hole (22).

6. A prestressed and non-prestressed hybrid reinforced concrete pole according to claim 5, characterized in that: The structures of the lower positioning structure (13) and the upper positioning structure (14) are the same as those of the middle positioning structure (12), and the dimensions of the lower positioning structure (13), the middle positioning structure (12), and the upper positioning structure (14) are set in a decreasing trend.

7. A prestressed and non-prestressed hybrid reinforced concrete pole according to claim 6, characterized in that: The outer cage (5) includes a steel reinforcing wire (10) and an outer positioning ring (11). The steel reinforcing wire (10) is arranged in a circle around the outer side of the inner cage (4). The outer positioning ring (11) is a variable pitch spiral hoop, and the outer positioning ring (11) and the steel reinforcing wire (10) are tied and fixed together by steel wire.

8. A prestressed and non-prestressed hybrid reinforced concrete pole according to claim 7, characterized in that: Positioning seats (23) are integrally formed on the side walls of the secondary positioning rings (16) of the middle positioning structure (12), lower positioning structure (13), and upper positioning structure (14). A steel wire positioning groove is provided on the positioning seat (23), and the steel wire (10) is stuck in the steel wire positioning groove.

9. A prestressed and non-prestressed hybrid reinforced concrete pole according to claim 8, characterized in that: A locking groove (24) is provided at the outer port of the primary mounting hole (19). A locking post (25) is integrally formed on the inner side of the nut of the positioning bolt (17). The locking post (25) is correspondingly provided with the locking groove (24). A locking opening (26) is provided on the secondary positioning ring (16) at the outer port of the secondary mounting hole (20). The locking opening (26) is a groove structure with a circular bottom and an arc-shaped opening at the port. The port of the locking opening (26) is flush with the end face of the secondary positioning ring (16) in the clockwise direction. The inner end face of the positioning nut (18) A movable rod groove is provided, and a movable rod (27) is movably installed in the movable rod groove. The inner end of the movable rod (27) is connected to the bottom of the movable rod groove through a return spring. When the return spring is in the return state, the end of the movable rod (27) protrudes out of the outside of the movable rod groove. When the return spring is compressed, the movable rod (27) is completely retracted into the movable rod groove. When the positioning nut (18) and positioning bolt (17) are actually installed, the locking post (25) is locked into the locking groove (24), and the movable rod (27) is inserted into the bottom surface of the locking opening (26).

10. A method for preparing a prestressed and non-prestressed hybrid reinforced concrete pole, characterized in that: The method for preparing the prestressed and non-prestressed hybrid reinforced concrete pole is used to prepare any one of the prestressed and non-prestressed hybrid reinforced concrete poles according to claims 3-9. The method includes the following steps: S1. Mold preparation: Clean and apply release agent to the inner wall of the centrifugal forming mold for the pole; S2. Position the inner cage (4) and outer cage (5) in the centrifugal forming mold of the pole, position the non-prestressed tendons according to the segmented variable density requirements, and in the high density area, use a detachable magnetic locator to temporarily fix the outer positioning ring (11) in the predetermined position inside the prestressed tendon, and then tie the outer positioning ring (11) to the steel wire (10). S3. The designed concrete mixture is poured into a mold containing a steel reinforcement cage. After the mold is closed, it is centrifugally rotated at high speed. Under the action of centrifugal force, the concrete is compacted and some water is released. At the same time, the non-prestressed tendons are pressed against the inner wall of the mold under the action of centrifugal force, and their positions are initially fixed. S4. Steam curing and demolding: The mold after centrifugation is steam cured at normal pressure. After the concrete reaches the demolding strength, the tension is removed and the concrete is demolded. During the demolding process, the slight slippage of the non-prestressed tendons in the concrete is restricted by the shallow positioning groove, thereby ensuring the accuracy of its final design position. S5. Post-processing: The electric pole is cured after demolding, and the shallow positioning groove is formed naturally after curing.

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