An assembled wind power concrete tower structure and construction method

Abstract

The present invention relates to an assembled wind power concrete tower structure and construction method, comprising multiple layers of cylindrical units, each layer of which comprises a plurality of arc-shaped unit pieces, each of which has reserved reinforcements on both sides thereof, a splicing seam between adjacent unit pieces, the reserved reinforcements being located in the splicing seams, and the splicing seams of upper and lower adjacent cylindrical units being staggered; an upper connector is provided at the upper end of the unit piece, and a lower connector is provided at the lower end thereof, the upper and lower connectors being connected via a detachable assembly. This application has the effect of improving the construction efficiency of assembled concrete towers.

Description

Technical Field

[0001] The present application relates to the technical field of concrete towers, and in particular to an assembled wind power concrete tower structure and a construction method. Background Art

[0002] Existing prefabricated wind turbine tower structures consist of multiple layers, each composed of multiple unit panels. Each unit panel has pre-reinforced reinforcement on all four sides. When adjacent units are initially joined together within a layer, cast-in-place joints are formed. Concrete must be poured between these joints and allowed to solidify before achieving the structural strength needed to support subsequent construction.

[0003] With respect to the above-mentioned related technologies, the inventors believe that when the concrete between the unit pieces has not reached the required strength, the connection nodes do not have the bearing capacity and subsequent construction cannot be carried out. Summary of the Invention

[0004] In order to speed up the construction efficiency of prefabricated concrete towers, the present application provides a prefabricated wind power concrete tower structure and a construction method.

[0005] The first technical objective of the present application is to provide an assembled wind power concrete tower structure adopting the following technical solution: comprising multiple layers of cylindrical units, each layer of cylindrical units comprising multiple arc-shaped unit pieces, with reserved reinforcements provided on both sides of the unit pieces, adjacent unit pieces having joints, the reserved reinforcements being located in the joints, and the vertical joints of upper and lower adjacent cylindrical units being staggered;

[0006] The upper end of the unit piece is provided with a lower connecting piece, and the lower end is provided with an upper connecting piece, and the upper connecting piece and the lower connecting piece are connected through a detachable component.

[0007] By adopting the above technical solution, when the upper connecting member and the lower connecting member are connected by a detachable component, the unit pieces can be spliced ​​together to form a cylindrical unit, and then a multi-layer cylindrical unit can be formed. Since the node structure formed by the upper connecting member and the lower connecting member being connected by the detachable component itself has bearing capacity, the concrete tower structure can be spliced ​​together more quickly than the related technology. In addition, the vertical splicing seams of the upper and lower adjacent cylindrical units are staggered, so that each unit piece can still form a stable cylindrical structure before concrete is poured at the splicing seams.

[0008] Optionally, the upper connecting member includes two upper butt joint plates, which are connected via an upper inner plate; the lower connecting member includes two lower butt joint plates, which are connected via a lower inner plate;

[0009] Alternatively, the upper connecting member includes two upper butt joint plates, both sides of which are provided with upper side plates, and the lower connecting member includes two lower butt joint plates, both sides of which are provided with lower side plates.

[0010] Optionally, the upper connecting member includes two upper butt joint plates, and two adjacent upper butt joint plates or two adjacent lower butt joint plates are connected by a tie steel plate, and the tie steel plate is also connected to the steel bars in the unit piece.

[0011] Optionally: the outer surface of the upper docking plate is provided with an upper reinforcement portion, the outer surface of the lower docking plate is provided with a lower reinforcement portion, and the detachable component includes a fastener and a reinforcement plate.

[0012] The lower end surface of the upper docking plate and the upper end surface of the lower docking plate abut against each other, at least one of the upper edge of the upper reinforcement portion and the lower edge of the lower reinforcement portion is provided with a sloped surface, the reinforcement plate is connected to the upper connecting member and the lower connecting member by fasteners, and an extrusion space is provided inside the reinforcement plate, the upper side wall of the extrusion space is a sloped surface adapted to the upper edge of the upper reinforcement portion, and the lower side wall is a sloped surface adapted to the lower edge of the lower reinforcement portion;

[0013] There are gaps between the lower edge of the upper reinforcement portion and the upper edge of the lower reinforcement portion, as well as between the reinforcement plate and the upper and lower connecting pieces. When the fasteners are tightened, the upper and lower connecting pieces tend to move closer to each other.

[0014] By adopting this technical solution and leveraging the geometric structure of the ramped surface, when the fastener is tightened, the reinforcement plate displaces toward the upper and lower docking plates. This displacement causes the reinforcement plate to compress the reinforcements provided on the upper and lower connectors. During this process, the upper and lower connectors tend to move toward each other due to the guiding constraints of the ramped surface, thereby forming an axial prestress at the connection point. Notably, the fastener's locking force is positively correlated with the prestress generated within the connection point: greater locking force results in higher prestress.

[0015] Optionally, the fastener includes a plurality of inner bolts, which pass through the reinforcing plate at the extrusion space position and are connected to the upper reinforcing part and the lower reinforcing part.

[0016] Optionally, the fasteners include external bolts that pass through both ends of the reinforcing plate and are connected to the upper docking plate and the lower docking plate.

[0017] Optionally: the upper and lower parts of the reinforcing plate are provided with adjustment holes extending in the height direction, the outer bolts pass through the adjustment holes, and the outer edge of the upper end of the lower reinforcing part has a guiding slope.

[0018] By adopting this technical solution, the reinforcement plate can be pre-assembled to the upper connector during the construction phase. Once the unit piece of the integrated reinforcement plate to be installed is aligned with the unit piece below, it is slowly lowered until the lower end of the reinforcement plate contacts the downwardly inclined surface pre-set on the outer edge of the upper end of the lower reinforcement. Due to the geometric guidance characteristics of the inclined surface, the reinforcement plate will now rotate freely and turn outward.

[0019] Optionally: the upper end surface of the lower reinforcement portion close to the outer side has a limiting edge, a docking space is formed on the inner side of the limiting edge, and the lower end of the upper connecting member is accommodated in the docking space.

[0020] By adopting the above technical solution, the displacement of the lower end of the upper connector in the docking space can be limited, thereby making the concrete tower formed by the unit pieces have a certain effect of resisting horizontal force and displacement.

[0021] The second technical purpose of this application is to provide a construction method for an assembled wind power concrete tower structure using the following technical solution: comprising the following steps:

[0022] Step 1: Use external bolts to penetrate the adjustment holes on the upper end of the reinforcement plate and make an initial pre-connection with the upper reinforcement part, so that the lower end of the reinforcement plate can be freely turned outward around its upper end;

[0023] Step 2: Perform the unit cell hoisting operation and use professional hoisting equipment to hoist the unit cell to be installed to the predetermined installation location;

[0024] Step 3: During the unit sheet's descent, the angle at which the lower end of the reinforcement plate is turned outward is controlled so that the lower reinforcement portion can smoothly enter the extrusion space of the reinforcement plate, achieving preliminary alignment of the structure.

[0025] Step 4: When the lower end surface of the upper docking plate is completely in contact with the upper end surface of the lower docking plate, perform final tightening on the outer bolts in step 1 according to the preload requirements to ensure that the designed preload is achieved after connection.

[0026] Step 5: After completing the preliminary connection, use the remaining inner and outer bolts to pass through the connection holes at both ends of the reinforcement plate, and perform the final fastening connection with the upper and lower docking plates to form a complete structural connection node;

[0027] Step 6: Pour concrete in the joints and between the upper and lower cylinder units.

[0028] In summary, this application has the following beneficial effects:

[0029] 1. Since the node structure formed by connecting the upper and lower connectors through detachable components has its own bearing capacity, it can be spliced ​​to form a concrete tower structure faster than related technologies. The continuous installation and construction of the above-mentioned unit pieces can be carried out without relying on the formation of concrete strength at the joints. In addition, the completed concrete tower tube itself has a strong bearing capacity comparable to that of a cast-in-place reinforced concrete structure.

[0030] 2. After being connected and locked by the reinforcement plate, the connection node has pre-compression stress, and the upper and lower connectors are not easy to be disengaged or to generate gaps when under tension;

[0031] 3. The adjustment holes on the reinforcement plate provide freedom of movement for the plate to rotate and unfold freely during the unit piece splicing process. When the upper and lower connectors are positioned and aligned, the reinforcement plate connected to the upper connector automatically locks to the lower connector through a geometric constraint mechanism, forming a reliable structural connection node. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structure of a concrete tower composed of multi-layer cylindrical units in this application.

[0033] Figure 2 This is a schematic diagram of the combined structure of the multi-layer cylinder unit of this application before grouting.

[0034] Figure 3 This is a schematic diagram of the combined structure of the upper connecting member and the lower connecting member of this application.

[0035] Figure 4 This is a schematic diagram of the exploded structure of the upper and lower connecting parts of this application.

[0036] Figure 5 This is a schematic diagram of the structure provided with an inner screw in this application.

[0037] Figure 6 This is a schematic structural diagram of the upper connecting member and the lower connecting member with upper side plates and lower side plates of the present application.

[0038] Figure 7 This is a schematic diagram of the connection between the upper connecting piece, lower connecting piece, tie steel plate and tower reinforcement of this application.

[0039] Figure 8 This is a schematic diagram of the gap between the reinforcement plate and the upper and lower docking plates in this application.

[0040] Description of reference numerals:

[0041] 1. Cylinder unit; 2. Unit piece; 3. Upper connecting piece; 4. Lower connecting piece; 5. Reserved ribs; 6. Tie steel plate; 8. Upper butt plate; 9. Upper inner plate; 10. Lower butt plate; 11. Lower inner plate; 12. Upper side plate; 13. Lower side plate; 14. Upper reinforcement; 15. Lower reinforcement; 16. Limiting edge; 17. Reinforcement plate; 18. Slope surface; 19. Extrusion space; 20. External bolt; 21. Nut; 22. Adjustment hole; 23. Guide slope; 24. Internal bolt; 25. Gap. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-8 This application is described in further detail.

[0043] like Figure 1 、 2As shown, an assembled wind power concrete tower structure disclosed in the present application includes a multi-layer cylindrical unit 1, each layer of the cylindrical unit 1 includes a plurality of arc-shaped unit pieces 2, the upper end of the unit piece 2 is provided with a lower connecting piece 4, and the lower end of the unit piece 2 is provided with an upper connecting piece 3. The upper connecting piece 3 and the lower connecting piece 4 are quickly connected through a detachable component, which can improve the construction efficiency of the concrete tower compared with the related technology.

[0044] like Figure 1 、 2 As shown, there are reserved ribs 5 on both sides of the unit pieces 2. There are vertical joints between adjacent unit pieces 2. The reserved ribs 5 are located in the vertical joints. The joints of the upper and lower adjacent cylindrical units 1 are staggered. This arrangement allows the unit pieces to form a stable cylindrical structure by connecting the upper and lower ends before concrete is poured or after pouring without forming strength. After the concrete tower is spliced, concrete is poured in the vertical joints and between the upper and lower cylindrical units 1, thus finally forming a complete concrete tower structure. Figure 3 As shown, the upper connecting member 3 includes two upper docking plates 8, which are vertically connected through an upper inner plate 9, and the lower connecting member 4 includes two lower docking plates 10, which are vertically connected through a lower inner plate 11.

[0045] like Figure 6 As shown, in another embodiment, the upper connector 3 includes two upper butt joint plates 8, with upper side plates 12 fixed to both sides of the two upper butt joint plates 8, and lower side plates 13 fixed to both sides of the two lower butt joint plates 10. Thus, the upper connector 3 and the lower connector 4 form a hoop with four plates connected in sequence. This structure has greater overall structural strength and stability.

[0046] As shown in FIG7 , tie plates are provided between two adjacent connecting members at the upper butt joint plate 8 and the lower butt joint plate 10 on the inner and outer sides respectively, for connecting the steel bars in the tower body.

[0047] like Figure 4 As shown, the outer surface of the upper docking plate 8 is formed with a raised upper reinforcement portion 14, and the outer surface of the lower docking plate 10 is formed with a raised lower reinforcement portion 15. The lower end of the upper docking plate 8 exceeds the upper reinforcement portion 14, and the lower reinforcement portion 15 exceeds the upper end of the lower docking plate 10 to form a limiting edge 16. A docking space is formed on the inner side of the limiting edge 16. The lower end of the upper connecting member 3 is accommodated in the docking space, and the lower end surface of the upper docking plate 8 and the upper end surface of the lower docking plate 10 abut against each other. The existence of the docking space can limit the displacement of the lower end of the upper connecting member 3 in the docking space, thereby making the unit piece 2 form a concrete tower with a certain effect of resisting horizontal force and displacement.

[0048] like Figure 4 、 8As shown, the detachable assembly includes fasteners and a reinforcement plate 17. At least one of the upper edge of the upper reinforcement 14 and the lower edge of the lower reinforcement 15 is provided with a sloped surface 18. In this embodiment, both the upper edge of the upper reinforcement 14 and the lower edge of the lower reinforcement 15 are provided with sloped surfaces 18. The reinforcement plate 17 is connected to the upper connector 3 and the lower connector 4 via fasteners. An extrusion space 19 is defined within the reinforcement plate 17. The upper sidewall of the extrusion space 19 is formed by a sloped surface 18 that matches the upper edge of the upper reinforcement 14, while the lower sidewall is formed by a sloped surface 18 that matches the lower edge of the lower reinforcement 15. Furthermore, gaps 25 exist between the lower edge of the upper reinforcement 14 and the upper edge of the lower reinforcement 15, as well as between the reinforcement plate 17 and the upper and lower connectors 4.

[0049] The fasteners include outer bolts 20, which pass through both ends of the reinforcing plate 17 and are connected to the upper docking plate 8 and the lower docking plate 10. The outer bolts 20 can be shorter bolts, which pass through the upper connecting member 3 and the lower connecting member 4 and are then screwed with nuts 21.

[0050] In another embodiment, the outer bolt 20 can also be a longer bolt that completely penetrates the upper connecting member 3 and the lower connecting member 4 and is then screwed with a nut 21. The outer bolt 20 can also be screwed at its end into the upper docking plate 8 or the lower docking plate 10.

[0051] By adopting the above technical solution and based on the geometric structure of ramp surface 18, when the fastener is tightened, reinforcement plate 17 is displaced toward upper and lower docking plates 8 and 10. This displacement causes reinforcement plate 17 to compress upper and lower reinforcement portions 14 and 15 provided on upper and lower connectors 3 and 4. During this process, the upper and lower connectors 3 and 4 tend to converge toward each other due to the guiding constraint of ramp surface 18, thereby forming an axial prestress at the connection point. It is worth noting that the fastener's tightening force is positively correlated with the prestress generated within the connection point: the greater the tightening force, the higher the prestress value.

[0052] like Figure 4 As shown, the upper and lower parts of the reinforcing plate 17 are provided with adjustment holes 22 extending in the height direction. Because the adjustment holes 22 are not circular, but have a certain length in the height direction, they can better correspond to the holes on the corresponding upper docking plate 8 and lower docking plate 10, so that the external bolts 20 can pass through the adjustment holes 22 for connection.

[0053] like Figure 5As shown, a guiding slope 23 is provided on the outer edge of the upper end of the lower reinforcement portion 15. During the construction implementation stage, the reinforcement plate 17 can be preliminarily assembled on the upper connecting member 3, but the outer bolts 20 are not tightened. After the unit piece 2 to be installed of the integrated reinforcement plate 17 is positioned and aligned with the unit piece 2 below, the lower end of the reinforcement plate 17 is slowly lowered so that the lower end of the reinforcement plate 17 is brought into contact with the downward guiding slope 23 preset on the outer edge of the upper end of the lower reinforcement portion 15. Based on the geometric guiding characteristics of the guiding slope 23, the reinforcement plate 17 will now rotate freely and turn outward. After the lower end of the upper connecting member 3 is docked with the upper end of the upper connecting member 4, the reinforcement plate 17 will enclose the upper reinforcement portion 14 and the lower reinforcement portion 15 in the extrusion space 19, thereby facilitating the construction operation.

[0054] like Figure 5 As shown, to enhance the connection strength between the reinforcing plate 17 and the upper and lower docking plates 8 and 9, the fasteners may further include a plurality of inner bolts 24. The inner bolts 24 pass through the reinforcing plate 17 at the extrusion space 19 and connect to the upper and lower reinforcing portions 14 and 15, thereby strengthening the connection strength between the reinforcing portions and the upper and lower connectors 3 and 4. The inner bolts 24 can be connected to the reinforcing plate 17, upper and lower connectors 3 and 4 in a variety of ways, the specific methods being consistent with the connection methods of the outer bolts 20.

[0055] The present application also discloses a construction method for an assembled wind power concrete tower structure, comprising the following steps:

[0056] Step 1: Use the external bolt 20 to penetrate the adjustment hole 22 at the upper end of the reinforcing plate 17 to make an initial pre-connection with the upper reinforcing portion 14, so that the lower end of the reinforcing plate 17 can freely flip outward around its upper end;

[0057] Step 2: Perform the hoisting operation of the unit piece 2, and use professional hoisting equipment to hoist the unit piece 2 to be installed to the predetermined installation location;

[0058] Step 3: The lower end of the reinforcement plate 17 is brought into contact with the downwardly directed slope 23 provided on the outer edge of the upper end of the lower reinforcement portion 15. Due to the geometric guidance characteristics of the slope 23, the reinforcement plate 17 will now freely rotate and turn outward. Once the lower end of the upper connector 3 is aligned with the upper end of the upper connector 4, the reinforcement plate 17 will enclose the upper and lower reinforcement portions 14, 15 within the extrusion space 19, achieving initial structural alignment.

[0059] Step 4: After the lower end surface of the upper docking plate 8 is completely in contact with the upper end surface of the lower docking plate 10, the outer bolts 2 in step 1 are tightened according to the preload requirements to ensure that the designed preload is achieved after connection.

[0060] Step 5: After completing the preliminary connection, use the remaining inner bolts 24 and outer bolts 20 as needed to pass through the connection holes at both ends of the reinforcing plate 17, and perform the final fastening connection with the upper docking plate 8 and the lower docking plate 10 to form a complete structural connection node;

[0061] Step 6: Pour concrete in the joints and between the upper and lower cylindrical units 1.

[0062] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An assembled wind power concrete tower structure, characterized by: The invention comprises a plurality of layers of cylindrical units (1), each layer of cylindrical units (1) comprises a plurality of arc-shaped unit pieces (2), reserved ribs (5) are provided on both sides of the unit pieces (2), vertical joints are provided between adjacent unit pieces (2), the reserved ribs (5) are located in the joints, and the vertical joints of the upper and lower adjacent cylindrical units (1) are staggered. The upper end of the unit piece (2) is provided with a lower connecting piece (4), and the lower end is provided with an upper connecting piece (3), and the upper connecting piece (3) and the lower connecting piece (4) are connected via a detachable component; The upper connecting member (3) includes two upper butt joint plates (8), which are connected via an upper inner plate (9); the lower connecting member (4) includes two lower butt joint plates (10), which are connected via a lower inner plate (11); Alternatively, the upper connecting member (3) includes two upper butt joint plates (8), both sides of the two upper butt joint plates (8) are provided with upper side plates (12), and the lower connecting member (4) includes two lower butt joint plates (10), both sides of the two lower butt joint plates (10) are provided with lower side plates (13); The outer surface of the upper docking plate (8) is provided with an upper reinforcement portion (14), the outer surface of the lower docking plate (10) is provided with a lower reinforcement portion (15), and the detachable assembly includes a fastener and a reinforcement plate (17); The lower end surface of the upper docking plate (8) and the upper end surface of the lower docking plate (10) are in contact with each other, at least one of the upper edge of the upper reinforcing portion (14) and the lower edge of the lower reinforcing portion (15) is provided with a slope surface (18), the reinforcing plate (17) is connected to the upper connecting member (3) and the lower connecting member (4) through a fastener, an extrusion space (19) is provided inside the reinforcing plate (17), the upper side wall of the extrusion space (19) is a slope surface (18) adapted to the upper edge of the upper reinforcing portion (14), and the lower side wall is a slope surface (18) adapted to the lower edge of the lower reinforcing portion (15); There are gaps (25) between the lower edge of the upper reinforcing portion (14) and the upper edge of the lower reinforcing portion (15), and between the reinforcing plate (17) and the upper and lower connecting members (4). When the fasteners are tightened, the upper connecting member (3) and the lower connecting member (4) tend to move closer to each other.

2. The assembled wind power concrete tower structure according to claim 1, characterized in that: Two adjacent upper butt joint plates (8) or two adjacent lower butt joint plates (10) are connected via a tie steel plate (6), and the tie steel plate (6) is also connected to the steel bars in the unit piece (2).

3. The assembled wind power concrete tower structure according to claim 1, characterized in that: The fasteners include a plurality of inner bolts (24), and the inner bolts (24) pass through the reinforcing plate (17) at the position of the extrusion space (19) and are connected to the upper reinforcing portion (14) and the lower reinforcing portion (15).

4. The assembled wind power concrete tower structure according to claim 1, characterized in that: The fasteners include outer bolts (20) passing through both ends of the reinforcing plate (17) and connected to the upper docking plate (8) and the lower docking plate (10).

5. The assembled wind power concrete tower structure according to claim 4, characterized in that: The upper and lower parts of the reinforcing plate (17) are provided with adjustment holes (22) extending in the height direction, the outer bolts (20) pass through the adjustment holes (22), and the outer edge of the upper end of the lower reinforcing part (15) has a guiding slope (23).

6. The assembled wind power concrete tower structure according to claim 1, characterized in that: The upper end surface of the lower reinforcement portion (15) close to the outer side is provided with a limiting edge (16), and a docking space is formed on the inner side of the limiting edge (16), and the lower end of the upper connecting member (3) is accommodated in the docking space.

7. A construction method for an assembled wind power concrete tower structure according to any one of claims 3 to 6, characterized in that: The construction steps include the following: Step 1: Use an external bolt (20) to penetrate the adjustment hole (22) at the upper end of the reinforcing plate (17) to perform initial pre-connection with the upper reinforcing portion (14), so that the lower end of the reinforcing plate (17) can freely turn outward around its upper end; Step 2: Perform the hoisting operation of the unit piece (2), and use professional hoisting equipment to hoist the unit piece (2) to be installed to the predetermined installation position; Step 3: During the descent of the unit sheet (2), the angle of the lower end of the reinforcing plate (17) is controlled so that the lower reinforcing portion (15) can smoothly enter the extrusion space (19) of the reinforcing plate (17), thereby achieving preliminary alignment of the structure; Step 4: After the lower end surface of the upper docking plate (8) and the upper end surface of the lower docking plate (10) are completely fitted together, the outer bolts (20) in step 1 are finally tightened according to the preload requirements to ensure that the designed preload is achieved after connection; Step 5: After completing the preliminary connection, use the remaining inner bolts (24) and outer bolts (20) to pass through the connection holes at both ends of the reinforcing plate (17) and perform the final fastening connection with the upper docking plate (8) and the lower docking plate (10) to form a complete structural connection node; Step 6: pouring concrete in the vertical joints between adjacent unit pieces (2) and between the upper and lower cylindrical units (1).

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