Fabricated wind power concrete tower structure and construction method

Abstract

The invention relates to an assembly type wind power concrete tower structure and a construction method, the assembly type wind power concrete tower structure comprises multiple layers of barrel units, each layer of barrel unit comprises multiple arc-shaped unit pieces, reserved ribs are arranged on the two sides of each unit piece, a splicing seam is formed between every two adjacent unit pieces, and the reserved ribs are located in the splicing seams. The splicing seams of the upper and lower adjacent barrel units are arranged in a staggered manner; upper connecting pieces are arranged at the upper ends of the unit pieces, lower connecting pieces are arranged at the lower ends of the unit pieces, and the upper connecting pieces and the lower connecting pieces are connected through detachable assemblies. The method has the effect of improving the construction efficiency of the fabricated concrete tower.

Description

Technical Field

[0001] The present application relates to the technical field of concrete towers, and particularly to a prefabricated wind power concrete tower structure and a construction method thereof. Background Art

[0002] The existing prefabricated wind power cylindrical tower structure includes a multi-layer structure, and each layer of the structure is composed of multiple unit pieces spliced together. Reserved bars are provided on all four sides of the unit piece. When adjacent unit pieces in a layer are initially spliced, a cast-in-place joint will be formed, and concrete needs to be poured between the cast-in-place joints and solidified before it can reach a certain structural strength to support subsequent construction.

[0003] Regarding the above related technologies, the inventor believes that when the concrete between the unit pieces has not reached the strength, the connection nodes do not have bearing capacity and subsequent construction cannot be carried out. Summary of the Invention

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

[0005] The first technical object of the present application provides a prefabricated wind power concrete tower structure, which adopts the following technical scheme: it includes multiple layers of cylindrical body units, each layer of cylindrical body unit includes multiple arc-shaped unit pieces, reserved bars are provided on both sides of the unit piece, there is a splicing joint between adjacent unit pieces, and the reserved bars are located in the splicing joint; the vertical splicing joints of adjacent upper and lower cylindrical body units are arranged staggeredly; A lower connecting piece is provided at the upper end of the unit piece, and an upper connecting piece is provided at the lower end. The upper connecting piece and the lower connecting piece are connected by a detachable component.

[0006] By adopting the above technical scheme, when the upper connecting piece and the lower connecting piece are connected by a detachable component, the unit pieces can be spliced together to form a cylindrical body unit, and then multiple layers of cylindrical body units can be formed. Since the node structure formed by connecting the upper connecting piece and the lower connecting piece through the detachable component itself has bearing capacity, compared with the related technologies, the concrete tower structure can be spliced faster. In addition, the vertical splicing joints of adjacent upper and lower cylindrical body units are arranged staggeredly, so that a stable cylindrical structure can still be formed before the concrete is poured at the splicing joints of each unit piece.

[0007] Optionally: the upper connecting piece includes two upper butt plates, and the two upper butt plates are connected by an upper inner plate; the lower connecting piece includes two lower butt plates, and the two lower butt plates are connected by a lower inner plate; Alternatively, the upper connecting piece includes two upper butt plates, and upper side plates are provided on both sides of the two upper butt plates; the lower connecting piece includes two lower butt plates, and lower side plates are provided on both sides of the two lower butt plates.

[0008] 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.

[0009] 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, The lower end surface of the upper docking plate and the upper end surface of the lower docking plate are in contact with each other, at least one of the upper edge of the upper reinforcing part and the lower edge of the lower reinforcing part is provided with a slope surface, the reinforcing plate is connected to the upper connecting part and the lower connecting part through a fastener, and an extrusion space is provided inside the reinforcing plate, the upper side wall of the extrusion space is a slope surface adapted to the upper edge of the upper reinforcing part, and the lower side wall is a slope surface adapted to the lower edge of the lower reinforcing part; There are gaps between the lower edge of the upper reinforcing part and the upper edge of the lower reinforcing part, and between the reinforcing plate and the upper and lower connecting pieces. When the fasteners are tightened, the upper connecting piece and the lower connecting piece tend to approach each other.

[0010] By adopting the above technical solution, based on the geometric structure of the slope surface, when the fastener is tightened, the reinforcing plate is displaced in the direction close to the upper docking plate and the lower docking plate, and the displacement causes the reinforcing plate to squeeze the reinforcing parts arranged on the upper connecting member and the lower connecting member. In this process, the upper connecting member and the lower connecting member tend to approach each other due to the guiding constraint of the slope surface, thereby forming an axial prestress at the connection node. It is worth noting that the locking force of the fastener is positively correlated with the prestress generated in the connection node, that is, the greater the locking force, the higher the prestress value formed.

[0011] Optionally: the fastener includes a plurality of internal bolts, and the internal bolts pass through the reinforcing plate at the extrusion space position and are connected to the upper reinforcing part and the lower reinforcing part.

[0012] 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.

[0013] 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.

[0014] By adopting the above technical solution, the reinforcing plate can be pre-assembled on the upper connecting piece during the construction implementation stage. After the unit piece to be installed of the integrated reinforcing plate is aligned with the unit piece below, the lower end of the reinforcing plate is slowly lowered so that the lower end of the reinforcing plate comes into contact with the downward guiding slope preset on the outer edge of the upper end of the lower reinforcing part. Based on the geometric guiding characteristics of the guiding slope, the reinforcing plate will freely rotate and evert at this time.

[0015] Optionally, the upper end surface of the lower reinforcing part close to the outside has a limiting edge, and a docking space is formed inside the limiting edge, and the lower end of the upper connecting piece is accommodated in the docking space.

[0016] By adopting the above technical solution, the displacement of the lower end of the upper connecting piece in the docking space can be restricted, so that the concrete tower formed by the unit pieces has a certain effect of resisting horizontal force and displacement.

[0017] The second technical object of the present application provides a construction method for an assembled wind power concrete tower structure, which adopts the following technical solutions: including the following steps: Step 1: Use an external bolt to penetrate the adjustment hole at the upper end of the reinforcing plate and perform an initial pre-connection with the upper reinforcing part, so that the lower end of the reinforcing plate can rotate outward around its upper end with freedom; Step 2: Perform the hoisting operation of the unit piece, and use a professional hoisting device to hoist the unit piece to be installed to the predetermined installation position; Step 3: During the descent of the unit piece, by controlling the angle of outward rotation of the lower end of the reinforcing plate, the lower reinforcing part can smoothly enter the extrusion space of the reinforcing plate to achieve the preliminary alignment of the structure; Step 4: When the lower end surface of the upper docking plate is completely attached to the upper end surface of the lower docking plate, perform the final tightening operation on the external bolt in Step 1 according to the pre-tightening force requirement to ensure that the design pre-tightening force is achieved after connection; Step 5: After the preliminary connection is completed, use the remaining internal bolts and external bolts to pass through the connection holes at both ends of the reinforcing plate respectively, and perform the final fastening connection with the upper docking plate and the lower docking plate to form a complete structural connection node; Step 6: Pour concrete in the splicing joint and between the upper and lower cylindrical body units.

[0018] In summary, the present application has the following beneficial effects: 1. Since the node structure formed by connecting the upper connecting piece and the lower connecting piece through the detachable component itself has bearing capacity, compared with the related technology, the concrete tower structure can be spliced faster, and the continuous installation construction of the above unit pieces can be carried out without relying on the formation of the concrete strength at the splicing joint, and the completed concrete tower barrel itself has the same bearing capacity as the cast-in-place reinforced concrete structure; 2. After being connected and locked by the reinforcing plate, the connection node has a pre-compressive stress, and it is not easy to separate and generate gaps between the upper connecting piece and the lower connecting piece when being tensioned; 3. The adjustment hole positions on the reinforcing plate provide freedom of movement for the free rotation and expansion of the reinforcing plate during the splicing process of the unit pieces. When the upper and lower connecting pieces are positioned and centered, the reinforcing plate connected to the upper connecting piece automatically locks the lower connecting piece through the geometric constraint mechanism to form a reliable structural connection node. Description of the Drawings

[0019] Figure 1 Schematic diagram of the overall structure of the concrete tower composed of multi-layer cylinder units of the present application.

[0020] Figure 2 Schematic diagram of the combined structure of the multi-layer cylinder units of the present application when not grouted.

[0021] Figure 3 Schematic diagram of the combined structure of the upper connecting piece and the lower connecting piece of the present application.

[0022] Figure 4 Schematic diagram of the disassembled structure of the upper connecting piece and the lower connecting piece of the present application.

[0023] Figure 5 Schematic diagram of the structure of the present application provided with internal screws.

[0024] Figure 6 Schematic diagram of the structure of the upper connecting piece and the lower connecting piece with upper side plates and lower side plates of the present application.

[0025] Figure 7 Schematic diagram of the connection between the upper connecting piece, the lower connecting piece, the tie plate and the tower barrel steel bars of the present application.

[0026] Figure 8 Schematic diagram of the gap between the reinforcing plate and the upper butt plate and the lower butt plate of the present application.

[0027] Explanation of reference numerals: 1, cylinder unit; 2, unit piece; 3, upper connecting piece; 4, lower connecting piece;5, reserved steel bars; 6, tie 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 strengthening part; 15, lower strengthening part; 16, limiting edge; 17, reinforcing plate; 18, inclined plane; 19, extrusion space; 20, external bolt; 21, nut; 22, adjustment hole; 23, guiding inclined plane; 24, internal bolt; 25, gap. Detailed implementation manners

[0028] The following will further elaborate on the present application in conjunction with the attached Figure 1-8 for a more detailed description.

[0029] As Figure 1 , 2 shown, a prefabricated wind power concrete tower structure disclosed in the present application includes multiple layers of cylinder units 1, each layer of cylinder unit 1 includes multiple arc-shaped unit pieces 2, a lower connecting piece 4 is arranged at the upper end of the unit piece 2, an upper connecting piece 3 is arranged at the lower end of the unit piece 2, and 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 art.

[0030] AsFigure 1 , 2 As shown in 2 , reserved ribs 5 are arranged on both sides of the unit sheet 2, and there is a vertical splicing joint between adjacent unit sheets 2. The reserved ribs 5 are located in the vertical splicing joint, and the splicing joints of the upper and lower adjacent cylinder units 1 are staggered from each other. Such an arrangement can enable the unit sheets to form a stable cylinder structure through the connection at their upper and lower ends when the concrete is not poured or after pouring but before the strength is formed. After the concrete tower is spliced, concrete is poured into the vertical splicing joint between the upper and lower cylinder units 1, thereby finally forming a complete concrete tower structure. As Figure 3 shown in Figure 3 , the upper connector 3 includes two upper docking plates 8, and the two upper docking plates 8 are vertically connected by an upper inner plate 9. The lower connector 4 includes two lower docking plates 10, and the two lower docking plates 10 are vertically connected by a lower inner plate 11.

[0031] As Figure 6 shown in Figure 6 , in another form, the upper connector 3 includes two upper docking plates 8, and upper side plates 12 are fixed on both sides of the two upper docking plates 8. Lower side plates 13 are fixed on both sides of the two lower docking plates 10. Thus, the upper connector 3 and the lower connector 4 present a hoop body formed by four plates connected in sequence. The structure formed in this way has stronger overall structural strength and stability.

[0032] If shown in

[0032] , tie steel plates are arranged at the upper docking plates 8 and the lower docking plates 10 on the inner and outer sides respectively between adjacent two connectors, for connecting the steel bars in the tower body.

[0033] As Figure 4 shown in Figure 4 , a raised upper strengthening part 14 is formed on the outer surface of the upper docking plate 8, and a raised lower strengthening part 15 is formed on the outer surface of the lower docking plate 10. The lower end of the upper docking plate 8 extends beyond the upper strengthening part 14, and the lower strengthening part 15 extends beyond the upper end of the lower docking plate 10 to form a limiting edge 16. A docking space is formed inside the limiting edge 16. The lower end of the upper connector 3 is accommodated in the docking space, and the lower end face of the upper docking plate 8 abuts against the upper end face of the lower docking plate 10. The existence of the docking space can limit the displacement of the lower end of the upper connector 3 in the docking space, and further enable the unit sheet 2 to form a concrete tower with a certain effect of resisting horizontal force and displacement As Figure 4 , 8As shown, the detachable component includes a fastener and a reinforcing plate 17. 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 ramp surface 18. In this embodiment, ramp surfaces 18 are provided on both the upper edge of the upper reinforcing portion 14 and the lower edge of the lower reinforcing portion 15. The reinforcing plate 17 is connected to the upper connecting member 3 and the lower connecting member 4 through the fastener, and an extrusion space 19 is provided inside the reinforcing plate 17. The upper side wall of the extrusion space 19 is a ramp surface 18 adapted to the upper edge of the upper reinforcing portion 14, and the lower side wall is a ramp surface 18 adapted to the lower edge of the lower reinforcing portion 15. Moreover, 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.

[0034] The fastener includes an external bolt 20. The external bolt 20 passes through both ends of the reinforcing plate 17 and is connected to the upper docking plate 8 and the lower docking plate 10. The external bolt 20 can be a shorter bolt, and after passing through the upper connecting member 3 and the lower connecting member 4, a nut 21 is screwed thereon.

[0035] In another embodiment, the external bolt 20 can also be a longer bolt, which completely penetrates the upper connecting member 3 and the lower connecting member 4 and then a nut 21 is screwed thereon. The external bolt 20 can also be screwed at the end into the upper docking plate 8 or the lower docking plate 10.

[0036] By adopting the above technical solution, based on the geometric structure of the ramp surface 18, when the fastener is tightened, the reinforcing plate 17 generates a displacement in the direction close to the upper docking plate 8 and the lower docking plate 10, and this displacement prompts the reinforcing plate 17 to exert an extrusion effect on the upper reinforcing portion 14 and the lower reinforcing portion 15 provided on the upper connecting member 3 and the lower connecting member 4. During this process, the upper connecting member 3 and the lower connecting member 4 have a tendency to approach each other due to the guiding constraint of the ramp surface 18, thereby forming an axial pre-compressive stress at the connection node. It should be noted that the locking force of the fastener is positively correlated with the pre-compressive stress generated inside the connection node, that is, the greater the locking force, the higher the value of the pre-compressive stress formed.

[0037] As Figure 4 shown, adjustment holes 22 extending in the height direction are provided in the upper and lower parts of the reinforcing plate 17. Since the adjustment holes 22 are non-circularly arranged but have a certain length in the height direction, it can better correspond to the holes on the corresponding upper docking plate 8 and lower docking plate 10, so that the external bolt 20 passes through the adjustment holes 22 for connection.

[0038] As Figure 5As shown in the figure, the outer edge at the upper end of the lower reinforcement part 15 has a guiding inclined surface 23. During the construction implementation stage, the reinforcement plate 17 can be preliminarily assembled to the upper connecting piece 3 in advance, but the outer bolts 20 are not tightened. After the unit piece 2 integrating the reinforcement plate 17 is positioned and aligned with the lower unit piece 2, through the slow lowering operation, the lower end of the reinforcement plate 17 contacts the downward guiding inclined surface 23 preset on the outer edge of the upper end of the lower reinforcement part 15. Based on the geometric guiding characteristics of the guiding inclined surface 23, at this time, the reinforcement plate 17 will perform a free rotation and outward turning action. After the lower end of the upper connecting piece 3 is docked with the upper end of the upper connecting piece 4, the reinforcement plate 17 will enclose the upper reinforcement part 14 and the lower reinforcement part 15 in the extrusion space 19, thus facilitating the construction operation.

[0039] As Figure 5 shown in the figure, in order to improve the connection strength between the reinforcement plate 17 and the upper docking plate 8 and the lower docking plate 9. The fasteners can also include several internal bolts 24. The internal bolts 24 pass through the reinforcement plate 17 at the position of the extrusion space 19 and are connected to the upper reinforcement part 14 and the lower reinforcement part 15, so as to strengthen the connection strength between the reinforcement part and the upper connecting piece 3 and the lower connecting piece 4. There are various connection methods for the internal bolts 24 with the reinforcement plate 17, the upper connecting piece 3, and the lower connecting piece 4, and the specific form is the same as the connection method of the outer bolts 20.

[0040] This application also discloses a construction method for an assembled wind power concrete tower structure, including the following steps: Step 1: Use the outer bolts 20 to penetrate the adjustment holes 22 at the upper end of the reinforcement plate 17 and perform an initial pre-connection with the upper reinforcement part 14, so that the lower end of the reinforcement plate 17 can achieve the freedom to turn outward around its upper end; Step 2: Perform the hoisting operation of the unit piece 2. Use a professional hoisting device to hoist the unit piece 2 to be installed to the predetermined installation position; Step 3: Make the lower end of the reinforcement plate 17 contact the downward guiding inclined surface 23 preset on the outer edge of the upper end of the lower reinforcement part 15. Based on the geometric guiding characteristics of the guiding inclined surface 23, at this time, the reinforcement plate 17 will perform a free rotation and outward turning action. After the lower end of the upper connecting piece 3 is docked with the upper end of the upper connecting piece 4, the reinforcement plate 17 will enclose the upper reinforcement part 14 and the lower reinforcement part 15 in the extrusion space 19 to achieve the preliminary alignment of the structure; Step 4: After the lower end surface of the upper docking plate 8 is completely attached to the upper end surface of the lower docking plate 10, perform the final tightening operation on the outer bolts 2 in Step 1 according to the pre-tightening force requirements to ensure that the designed pre-tightening force is reached after connection; Step 5: After the preliminary connection is completed, use the remaining internal bolts 24 and outer bolts 20 as appropriate, respectively pass through the connection holes at both ends of the reinforcement 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: Pour concrete between the splicing seams and between the upper and lower cylinder units 1.

[0041] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An assembled wind power concrete tower structure, characterized in that: It includes multiple layers of cylindrical body units (1). Each layer of cylindrical body unit (1) includes multiple arc-shaped unit pieces (2). Reserved reinforcing bars (5) are arranged on both sides of the unit piece (2). There is a vertical splicing seam between adjacent unit pieces (2). The reserved reinforcing bars (5) are located in the splicing seam. The vertical splicing seams of the upper and lower adjacent cylindrical body units (1) are arranged staggeredly. A lower connecting member (4) is arranged at the upper end of the unit piece (2), and an upper connecting member (3) is arranged at the lower end. The upper connecting member (3) and the lower connecting member (4) are connected by a detachable component.

2. The prefabricated wind power concrete tower structure according to claim 1, wherein: The upper connecting member (3) includes two upper docking plates (8). The two upper docking plates (8) are connected by an upper inner plate (9). The lower connecting member (4) includes two lower docking plates (10). The two lower docking plates (10) are connected by a lower inner plate (11). Alternatively, the upper connecting member (3) includes two upper docking plates (8). Upper side plates (12) are arranged on both sides of the two upper docking plates (8). The lower connecting member (4) includes two lower docking plates (10). Lower side plates (13) are arranged on both sides of the two lower docking plates (10).

3. The prefabricated wind power concrete tower structure according to claim 2, characterized in that: Adjacent two of the upper docking plates (8) or adjacent two of the lower docking plates (10) are connected by a tie steel plate (6). The tie steel plate (6) is also connected to the steel bars inside the unit piece (2).

4. The prefabricated wind power concrete tower structure according to claim 2, wherein: An upper strengthening part (14) is arranged on the outer surface of the upper docking plate (8), and a lower strengthening part (15) is arranged on the outer surface of the lower docking plate (10). The detachable component includes fasteners and a strengthening plate (17). The lower end face of the upper docking plate (8) abuts against the upper end face of the lower docking plate (10). At least one of the upper edge of the upper strengthening part (14) and the lower edge of the lower strengthening part (15) is provided with a slope surface (18). The strengthening plate (17) is connected to the upper connecting member (3) and the lower connecting member (4) by fasteners. An extrusion space (19) is arranged inside the strengthening plate (17). The upper side wall of the extrusion space (19) is a slope surface (18) adapted to the upper edge of the upper strengthening part (14), and the lower side wall is a slope surface (18) adapted to the lower edge of the lower strengthening part (15). There are gaps (25) between the lower edge of the upper strengthening part (14) and the upper edge of the lower strengthening part (15), and between the strengthening 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 approach each other.

5. The prefabricated wind power concrete tower structure according to claim 4, wherein: The fasteners include several internal bolts (24). The internal bolts (24) pass through the strengthening plate (17) at the position of the extrusion space (19) and are connected to the upper strengthening part (14) and the lower strengthening part (15).

6. The prefabricated wind power concrete tower structure according to claim 4, characterized in that: The fasteners include external bolts (20). The external bolts (20) pass through both ends of the strengthening plate (17) and are connected to the upper docking plate (8) and the lower docking plate (10).

7. The prefabricated wind power concrete tower structure according to claim 4, wherein: Adjusting holes (22) extending in the height direction are arranged at the upper and lower parts of the strengthening plate (17). The external bolts (20) pass through the adjusting holes (22). The outer edge of the upper end of the lower strengthening part (15) has a guiding slope surface (23).

8. A prefabricated wind power concrete tower structure and construction method according to claim 4, characterized in that: The upper end surface of the lower reinforcing part (15) close to the outside has a limiting edge (16), and a docking space is formed inside the limiting edge (16), and the lower end of the upper connecting piece (3) is received in the docking space.

9. The construction method of an assembled wind power concrete tower structure according to any one of claims 5-8, characterized in that: It includes the following construction steps: Step 1: Pass an external bolt (20) through the adjustment hole (22) at the upper end of the reinforcing plate (17) and perform an initial pre-connection with the upper reinforcing part (14), so that the lower end of the reinforcing plate (17) can achieve the freedom of outward flipping around its upper end; Step 2: Carry out 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 piece (2), by controlling the angle of outward flipping of the lower end of the reinforcing plate (17), the lower reinforcing part (15) can smoothly enter the extrusion space (19) of the reinforcing plate (17) to achieve the preliminary alignment of the structure; Step 4: After the lower end surface of the upper docking plate (8) is completely attached to the upper end surface of the lower docking plate (10), perform the final tightening operation on the external bolt (20) in Step 1 according to the pre-tightening force requirement to ensure that the designed pre-tightening force is achieved after connection; Step 5: After the preliminary connection is completed, use the remaining internal bolts (24) and external bolts (20) to pass through the connection holes at both ends of the reinforcing plate (17) respectively, 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: Pour concrete between the splicing joints and between the upper and lower cylindrical units (1).

Images