Mixed tower transition section for reinforced concrete tower

Abstract

The utility model discloses a mixed tower transition section for a reinforced concrete tower frame, which comprises a mixed tower transition section which is concentrically and coaxially fixed at the top end of a mixed tower section, the mixed tower transition section is of an annular structure, and the top of the mixed tower transition section is sequentially provided with a transition section embedded base plate and a steel adapter section flange. A whole-ring anchor backing plate is arranged at the position, corresponding to the steel switching section flange, of the bottom of the mixed tower transition section, a plurality of fasteners are arranged on the steel switching section flange around a shaft, and the fasteners sequentially penetrate through the steel switching section flange, the transition section embedded backing plate, the mixed tower transition section and the whole-ring anchor backing plate. The steel switching section flange, the transition section embedded base plate, the mixed tower transition section and the whole ring anchor base plate are clamped and fixed between the fasteners, a groove is formed in the side, close to the steel switching section flange, of the transition section embedded base plate, and flange sealant is poured into the groove. Through the penetrating type anchor bolts, the lower end face whole-ring type anchor bearing plate and the anti-skid pins, the risk that the steel switching section is disengaged from the mixed tower transition section is greatly reduced, and the sealing effect is kept.

Description

Technical Field

[0001] This utility model relates to the technical field of mixed tower transition sections, and in particular to mixed tower transition sections used in steel-concrete towers. Background Technology

[0002] The connection between the concrete and steel sections of a reinforced concrete tower mainly focuses on the design of the transition section at the top of the concrete tower and the junction section at the bottom of the steel tower. There are currently two solutions for connecting the concrete transition section to the steel tower section:

[0003] The first method is the prestressed approach: prestressed steel strands pass through the transition flange of the steel transition section, are anchored on the flange, and pre-tensioned (this is also a common reinforcement method for connecting the various sections of the concrete section). The transition flange serves as the top anchoring end, effectively fixing the steel transition section to the transition section (with a pre-embedded transition pad). This method relies on the prestress of the steel strands to create friction between the transition flange and the pre-embedded transition pad, thus fixing the steel transition section. However, this design cannot prevent the transition section from detaching from the concrete tower transition section (a gap appears between the bottom surface of the transition flange and the transition pad) or slipping (radial displacement of the transition section) when the load changes.

[0004] The second option is a pure anchor bolt scheme: the anchor plates of the prestressed steel strands are directly embedded in the end face of the top section of the concrete tower, without acting on the steel transition flange. The connection between the steel section and the concrete section relies entirely on the pre-embedded anchor bolts. This scheme greatly increases the risk of cracks appearing in the concrete transition section after the pre-embedded anchor bolts are under tension.

[0005] In addition, if the flange of the transition section comes detached in either of the above two solutions, the sealant will also come off, thus failing to provide a waterproof seal. Utility Model Content

[0006] This utility model provides a mixed tower transition section for steel-concrete towers, aiming to solve the problems mentioned above. In the existing mixed tower transition section installation method, it is impossible to prevent the transition section from separating or slipping when the load changes, or the risk of cracks appearing in the concrete transition section after the pre-embedded anchor bolts are under tension is greatly increased. In the case of the transition section flange separating, the sealant will also come off, and it will not play a waterproof sealing role.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] The mixed-concrete tower transition section for steel-concrete towers includes a concentric and coaxial mixed-concrete tower transition section fixed to the top of the mixed-concrete tower section. The mixed-concrete tower transition section has a ring structure. The top of the mixed-concrete tower transition section is provided with a transition section embedded pad and a steel transition section flange in sequence. The bottom of the mixed-concrete tower transition section is provided with a ring anchor plate at the position corresponding to the steel transition section flange. Several fasteners are provided around the axis on the steel transition section flange. The fasteners pass through the steel transition section flange, the transition section embedded pad, the mixed-concrete tower transition section and the ring anchor plate in sequence. The steel transition section flange, the transition section embedded pad, the mixed-concrete tower transition section and the ring anchor plate are clamped and fixed between the fasteners. The transition section embedded pad has a groove on the side near the steel transition section flange. The groove is filled with flange sealant.

[0009] Preferably, the transition section of the mixing tower is a concrete structure.

[0010] Preferably, the pre-embedded pad of the transition section, the steel transition section flange, and the ring anchor plate are all ring-shaped and coaxial with the transition section of the mixed tower.

[0011] More preferably, all the grooves are annular, and the grooves are concentric and coaxial with the pre-embedded pad of the transition section.

[0012] Furthermore, a plastic film is provided on the inner wall of both the inner and outer rings of the groove, and the flange sealant is isolated from the side wall of the pre-embedded pad of the transition section through the plastic film.

[0013] Furthermore, the flange sealant forms an elastically stretchable adhesive, and the steel transition flange forms a sealed fit with the pre-embedded gasket of the transition section through the flange sealant.

[0014] Preferably, the steel transition section flange is provided with several steel strands and anchor kits at equal intervals around the axis. The steel strands pass through the steel transition section flange, the pre-embedded pad of the transition section, the mixed tower transition section and the whole ring anchor plate in sequence and then extend into the top of the mixed tower section.

[0015] More preferably, the fasteners are located between adjacent steel strands and anchor kits, and the fasteners are distributed at equal intervals around the axis.

[0016] Furthermore, the fastener is an anchor bolt, including a transition section anchor bolt post, an anchor bolt washer, and an anchor bolt nut. The transition section anchor bolt post passes sequentially through the steel transition section flange, the transition section embedded gasket, the mixed tower transition section, and the entire ring anchor plate. Both ends of the transition section anchor bolt post are fitted with anchor bolt washers and anchor bolt nuts. The anchor bolt nuts form a threaded fit with the transition section anchor bolt post. One end of the anchor bolt nut forms a compression fit with the top of the steel transition section flange through the anchor bolt washer, and the other end of the anchor bolt nut forms a compression fit with the bottom of the entire ring anchor plate through the anchor bolt washer.

[0017] Preferably, the steel transition flange is provided with a number of anti-slip pins at equal intervals around the axis. The anti-slip pins penetrate into the pre-embedded pad of the transition section, and the steel transition flange forms a fixed fit with the pre-embedded pad of the transition section through the anti-slip pins.

[0018] The beneficial effects of this utility model are:

[0019] The three new designs—through anchor bolts, full-ring anchor plates on the lower end face, and anti-slip pins—significantly reduce the risk of separation between the steel transition section and the mixed tower transition section, while also eliminating the risk of the mixed tower transition section being torn due to the pre-embedded anchor bolts.

[0020] In addition, the sealant groove allows the solidified sealant to form an elastic adhesive, maintaining a sealing effect even when the transition flange is detached. Attached Figure Description

[0021] Figure 1 This is a three-dimensional cross-sectional view of the present invention;

[0022] Figure 2 This is a front view schematic diagram of the present invention;

[0023] Figure 3 For the present utility model Figure 2 Enlarged schematic diagram at point II;

[0024] Figure 4 This is a schematic diagram showing the state of the sealant when the transition flange of this utility model is detached;

[0025] In the diagram: 1. Transition section of the mixed tower; 2. Embedded pad of the transition section; 3. Steel transition section flange; 4. Full ring anchor plate; 5. Steel strand and anchor kit; 6. Anchor bolt washer; 7. Anchor bolt post of the transition section; 8. Anchor bolt nut; 9. Anti-slip pin; 10. Flange sealant; 11. Mixed tower section. Detailed Implementation

[0026] The embodiments will be further described below with reference to the accompanying drawings.

[0027] like Figures 1-3As shown in the preferred embodiment 1, the mixed tower transition section for steel-concrete towers includes a concentric and coaxial mixed tower transition section 1 fixed to the top of the mixed tower section 11. The mixed tower transition section 1 has an annular structure. The top of the mixed tower transition section 1 is provided with a transition section embedded pad 2 and a steel transition section flange 3 in sequence. The bottom of the mixed tower transition section 1 is provided with a ring anchor plate 4 at the position corresponding to the steel transition section flange 3. Several fasteners are provided around the steel transition section flange 3. The fasteners all pass through the steel transition section flange 3, the transition section embedded pad 2, the mixed tower transition section 1 and the ring anchor plate 4 in sequence. The steel transition section flange 3, the transition section embedded pad 2, the mixed tower transition section 1 and the ring anchor plate 4 are clamped and fixed between the fasteners. The transition section embedded pad 2 has a groove on the side near the steel transition section flange 3. Flange sealant 10 is poured into the groove.

[0028] The transition section 1 of the mixed tower is a concrete structure.

[0029] The pre-embedded pad 2 of the transition section, the steel transition section flange 3, and the ring anchor plate 4 are all annular and coaxial with the transition section 1 of the mixed tower. This facilitates installation and alignment.

[0030] In a preferred embodiment 2, all the grooves are annular, and the grooves are concentric and coaxial with the pre-embedded pad 2 of the transition section. This facilitates installation and alignment.

[0031] The inner and outer rings of the groove are both provided with a layer of plastic film on their inner walls, and the flange sealant 10 is isolated from the side wall of the transition section pre-embedded pad 2 through the plastic film.

[0032] The flange sealant 10 forms an elastically stretchable adhesive, and the steel transition flange 3 forms a sealed fit with the transition section embedded gasket 2 through the flange sealant 10.

[0033] A groove is designed on the upper surface of the transition section pre-embedded gasket 2 for the injection of flange sealant 10. Plastic film is attached to both sides of the groove to separate the sealant, so that the solidified sealant 10 forms an elastic adhesive that adheres to the bottom of the groove and the bottom of the steel transition section flange 3. For example... Figure 4 As shown, even when the steel transition stage separates from the mixing section transition pad, the sealant 10 can be stretched elastically without breaking, still maintaining its sealing function. Compared to directly applying sealant, this effectively reduces the risk of leakage.

[0034] The groove cross-section can be 10×10mm.

[0035] Preferably, the top of the mixing tower transition section 1 is provided with several pre-embedded studs, which are inserted into the pre-embedded pad 2 of the transition section and form a limiting fit with the pre-embedded pad 2 of the transition section.

[0036] As a preferred embodiment 3, the steel transition section flange 3 is provided with several steel strands and anchor kits 5 at equal intervals around the axis. The steel strands pass through the steel transition section flange 3, the transition section pre-embedded pad 2, the mixed tower transition section 1 and the whole ring anchor plate 4 in sequence and then extend into the top of the mixed tower section 11.

[0037] The fasteners are located between adjacent steel strands and anchor kits 5, and are evenly distributed around the axis. This ensures uniform force distribution during fastening, and the fixing components are conventionally installed.

[0038] The fasteners are anchor bolts, including a transition section anchor bolt 7, an anchor bolt washer 6, and an anchor bolt nut 8. The transition section anchor bolt 7 passes sequentially through the steel transition section flange 3, the transition section embedded pad 2, the mixed tower transition section 1, and the ring anchor plate 4. Anchor bolt washers 6 and anchor bolt nuts 8 are threaded onto both ends of the transition section anchor bolt 7. One end of the anchor bolt nut 8 forms a compression fit with the top of the steel transition section flange 3 through the anchor bolt washer 6, and the other end of the anchor bolt nut 8 forms a compression fit with the bottom of the ring anchor plate 4 through the anchor bolt washer 6. This ensures a tight fit of the through anchor bolt.

[0039] As a preferred embodiment 4, the steel transition flange 3 is provided with a plurality of anti-slip pins 9 at equal intervals around its axis. The anti-slip pins 9 penetrate into the pre-embedded pad 2 of the transition section, and the steel transition flange 3 forms a fixed fit with the pre-embedded pad 2 of the transition section through the anti-slip pins 9. This further ensures the tight fit between the pre-embedded pad 2 of the transition section and the steel transition flange 3.

[0040] In practical applications, steel strands and anchor kits 5, combined with grout, are the primary method for connecting concrete tower sections, and also the primary method for connecting steel transition sections. The steel strands have a large span, extending upwards from the tower foundation, passing through the concrete transition section 1, and reaching the upper surface of the steel transition section flange 3, where they are anchored. This patent uses evenly distributed through-type anchors in the gaps between the steel strands and anchor kits 5. These anchors extend from the transition section flange 3 to the bottom of the concrete transition section 1, and are anchored to the ring-shaped anchor plate 4 with anchor nuts 8, thus securing the steel transition section flange 3 to the concrete transition section 1. The ring-shaped anchor plate 4 at the bottom of the concrete transition section 1 has a similar structure and function to the pre-embedded pad 2 at the top of the transition section, preventing uneven concrete surfaces from hindering load bearing, supporting pre-tensioning forces, and preventing cracking at the anchors and anchors in the concrete transition section 1. The inner side of the steel transition section flange 3 is also evenly distributed with a ring of anti-slip pins 9, which penetrate the steel transition section flange 3 and are inserted into the pre-embedded pad 2 of the transition section (40mm depth).

[0041] The working principle of this utility model:

[0042] Through-type anchors are evenly distributed in the gaps between the steel strands. The anchors extend from the steel transition section flange 3 to the bottom of the concrete tower transition section 1, securing the steel transition section flange 3 to the concrete tower transition section 1. A full-ring anchor plate 4 is also provided at the bottom of the concrete tower transition section 1, along with the pre-embedded pad plate 2 at the top of the transition section. A ring of anti-slip pins 9 is also evenly distributed on the inner side of the steel transition section flange 3, penetrating the flange and inserting into the pre-embedded pad plate 2 of the transition section. Through the above innovative design, the risk of gaps or slippage at the contact surface of the transition section is greatly reduced, and the risk of damage to the concrete of the transition section after manual handling is avoided.

[0043] The upper surface of the pre-embedded pad 2 in the transition section has a ring groove for the injection of flange sealant 10. The two sides of the groove are covered with plastic film to prevent the flange sealant 10 from sticking to the side wall of the groove. This ensures that the flange sealant 10 only sticks to the bottom surface of the groove and the flange of the transition section. This design allows the flange sealant 10 to be elastically stretched without breaking and still play a sealing role when the steel transition section is separated from the transition pad of the mixed section.

Claims

1. A mixed-concrete tower transition section for steel-concrete towers, comprising a concentric and coaxial mixed-concrete tower transition section (1) fixed to the top of a mixed-concrete tower section (11), characterized in that, The mixed tower transition section (1) is a ring structure. The top of the mixed tower transition section (1) is provided with a transition section embedded pad (2) and a steel transition section flange (3) in sequence. The bottom of the mixed tower transition section (1) is provided with a ring anchor plate (4) at the position corresponding to the steel transition section flange (3). Several fasteners are provided around the steel transition section flange (3). The fasteners pass through the steel transition section flange (3), the transition section embedded pad (2), the mixed tower transition section (1) and the ring anchor plate (4) in sequence. The steel transition section flange (3), the transition section embedded pad (2), the mixed tower transition section (1) and the ring anchor plate (4) are clamped and fixed between the fasteners. The transition section embedded pad (2) is provided with a groove on the side near the steel transition section flange (3). Flange sealant (10) is poured into the groove.

2. The mixed-concrete tower transition section for steel-concrete towers according to claim 1, characterized in that, The transition section (1) of the mixed tower is a concrete structure.

3. The mixed-concrete tower transition section for steel-concrete towers according to claim 1, characterized in that, The pre-embedded pad (2) of the transition section, the steel transition section flange (3) and the ring anchor plate (4) are all ring-shaped and coaxial with the transition section (1) of the mixed tower.

4. The mixed-concrete tower transition section for steel-concrete towers according to claim 3, characterized in that, All the grooves are annular, and the grooves are concentric and coaxial with the pre-embedded pad (2) of the transition section.

5. The mixed-concrete tower transition section for steel-concrete towers according to claim 4, characterized in that, The inner and outer rings of the groove are both provided with a layer of plastic film on their inner walls. The flange sealant (10) is isolated from the side wall of the pre-embedded pad (2) of the transition section through the plastic film.

6. The mixed-concrete tower transition section for steel-concrete towers according to claim 5, characterized in that, The flange sealant (10) forms an elastically stretchable adhesive, and the steel transition flange (3) forms a sealed fit with the transition section pre-embedded gasket (2) through the flange sealant (10).

7. The mixed-concrete tower transition section for steel-concrete towers according to claim 1, characterized in that, The steel transition section flange (3) is provided with several steel strands and anchor kits (5) at equal intervals around the axis. The steel strands pass through the steel transition section flange (3), the transition section pre-embedded pad (2), the mixed tower transition section (1) and the whole ring anchor plate (4) in sequence and then extend into the top of the mixed tower section (11).

8. The mixed-concrete tower transition section for steel-concrete towers according to claim 7, characterized in that, The fasteners are located between adjacent steel strands and anchor kits (5), and the fasteners are distributed at equal intervals around the axis.

9. The mixed-concrete tower transition section for steel-concrete towers according to claim 8, characterized in that, The fastener is an anchor bolt, including a transition section anchor bolt column (7), an anchor bolt washer (6) and an anchor bolt nut (8). The transition section anchor bolt column (7) passes through the steel transition section flange (3), the transition section embedded pad (2), the mixed tower transition section (1) and the ring anchor plate (4) in sequence. Anchor bolt washers (6) and anchor bolt nuts (8) are inserted at both ends of the transition section anchor bolt column (7). The anchor bolt nut (8) and the transition section anchor bolt column (7) form a threaded fit. One end of the anchor bolt nut (8) forms a compression fit with the top of the steel transition section flange (3) through the anchor bolt washer (6), and the other end of the anchor bolt nut (8) forms a compression fit with the bottom of the ring anchor plate (4) through the anchor bolt washer (6).

10. The mixed-concrete tower transition section for steel-concrete towers according to claim 1, characterized in that, The steel transition flange (3) is provided with several anti-slip pins (9) at equal intervals around the axis. The anti-slip pins (9) are inserted into the pre-embedded pad (2) of the transition section, and the steel transition flange (3) forms a fixed fit with the pre-embedded pad (2) of the transition section through the anti-slip pins (9).

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