A reinforcing structure for a circular concrete belt type wind turbine foundation

Abstract

The application discloses a kind of circular concrete belt type wind generator foundation reinforcement structure, belong to wind power plant building foundation technical field, by outside supporting portion, the bottom outside of wind generator foundation is further reinforced, by forming the fastening and thick package structure that surrounds the outside of wind generator foundation;This reinforcement structure has the repair effect to the outside crack of wind generator foundation, and the outer diameter of reinforced wind generator foundation is larger, can have stronger structural bearing capacity;Further, the claw-shaped gripping structure is inserted into the ground, to provide more external support points for the wind generator foundation, reduce the shaking of wind generator, avoid the deflection of wind generator, also can improve the upward lifting of wind generator under the influence of strong wind, this structure is simple to install, stable structure, with anti-deflection, anti-cracking, anti-uplift etc. Load capacity, can retain the original wind generator structure, reduce economic expenditure.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of wind farm building foundation, and particularly relates to a reinforcing structure of a ring-shaped concrete belt type wind turbine foundation base. BACKGROUND

[0002] As a clean renewable energy, wind energy has great development potential, and the installed capacity of wind power is an important part of the total installed power capacity. The wind turbine support system is a high-rise building in structure, and the foundation of a large wind turbine is subjected to more complex loads. The foundation is subjected to multi-directional repeated loads and large eccentric forces, so the stability of the foundation is required to be high. With the large-scale construction and years of operation of the wind turbine unit, large cracks appear at the bottom of the tower drum and the concrete, and the concrete around the tower drum is crushed, which may cause serious accidents such as overturning.

[0003] The existing reinforcing method usually adopts grouting reinforcement, that is, inorganic slurry is injected into the root of the lower flange for reinforcement, and epoxy resin or other materials are injected into the gap between the foundation and the foundation ring for reinforcement. However, grouting reinforcement can only restore the original bearing capacity of the concrete around the foundation ring. When the original bearing capacity is insufficient, this method cannot improve the bearing capacity. Even if the repair is completed, with the increase of the operation time of the wind turbine, the wind turbine foundation repaired by grouting reinforcement is still likely to be damaged under the same wind load in the future. SUMMARY

[0004] Therefore, the present application aims to provide a reinforcing structure of a ring-shaped concrete belt type wind turbine foundation base, which can further reinforce the base of the wind turbine foundation base.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] The present application comprises three or more external support parts, which comprise arc-shaped plates and support frames. All the arc-shaped plates are arranged around the outside of the wind turbine foundation base to form a cylindrical shell. The inner side of the arc-shaped plate is provided with a plurality of transverse steel bars arranged against the side surface of the wind turbine and a plurality of steel rings arranged around the outside of the wind turbine. The shell and the wind turbine foundation base are filled with concrete to form a concrete ring. The support frame is fixed to the outside of the arc-shaped plate, and the support frame extends a support leg obliquely downward. The support leg is obliquely inserted into the ground.

[0007] Further, the transverse steel bars comprise two steel bars, the end of the steel bar is provided with a stopper, a circular hole is formed in the stopper, and the two steel bars are inserted through the circular hole of the stopper. One end of one of the steel bars is fixed to the inner side of the arc-shaped plate, and a spring is arranged between the inner side of the arc-shaped plate and the stopper close to the side surface of the arc-shaped plate.

[0008] Further, the reinforcing ring is divided into several arc-shaped reinforcing bars, the end of the arc-shaped reinforcing bar is provided with a sliding block, a circular hole is formed in the sliding block, the tail end of the arc-shaped reinforcing bar is slid into the circular hole of the sliding block, and the arc-shaped reinforcing bars are connected in a loop shape.

[0009] Further, the fixing strip is arranged on the contact position of the adjacent arc-shaped plates, and a plurality of locking screws are arranged on the fixing strip.

[0010] Further, the support frame comprises an inclined support rod, a horizontal support rod and an inclined plate, the inner end of the inclined support rod is fixed to the top side of the middle part of the outer side of the arc-shaped plate, the inner end of the horizontal support rod is fixed to the bottom side of the middle part of the outer side of the arc-shaped plate, the outer ends of the inclined support rod and the horizontal support rod are fixed to the inclined plate, the inclination angle of the inclined plate is the same as the inclination angle of the support leg, the upper end of the support leg is fixedly provided with a sliding seat body, the sliding seat body is slidably clamped on the inclined plate, and the sliding seat body is supported on the outer side of the inclined plate.

[0011] Further, the support leg comprises a circular tubular upper column, a disc-shaped bottom table is fixedly arranged at the lower end of the upper column, a plurality of long reinforcing bars are fixedly arranged on the lower side of the bottom table, a plurality of sink holes with a diameter larger than that of the bottom table are formed on the ground at the position of the support leg, the bottom table and the long reinforcing bars are inserted into the sink holes, and concrete is poured in the sink holes to form a concrete leg.

[0012] Further, the sealing strip is fixedly arranged around the bottom end of the shell.

[0013] The beneficial effects of the present application are as follows:

[0014] The application further reinforces the bottom outer side of the wind power generator base through more than three external support parts, forms a cylindrical shell through surrounding several arc-shaped plates, forms a pouring gap between the shell and the wind power generator base, pours concrete through the setting of several layers of transverse steel bars and steel rings between the pouring gap, and forms a tight and thick wrapping structure surrounding the outer side of the wind power generator base after the solidification of the concrete, if necessary, performs the chiseling treatment on the outer side of the wind power generator base to strengthen the connecting force between the solidified concrete ring and the base; the reinforcing structure has the repairing effect on the outer side cracks of the wind power generator base, and the outer diameter of the reinforced wind power generator base is larger, which can have stronger structural bearing capacity; further, the claw-shaped gripping structure is set to be inserted into the ground to provide more external support points for the wind power generator base, reduce the shaking of the wind power generator, avoid the deflection of the wind power generator, and also improve the upward lifting of the wind power generator under the influence of strong wind, the structure is simple to install, stable in structure, has the bearing capacity of anti-deflection, anti-fracture and anti-uplift, can retain the original wind power generator structure, and reduces the economic expenditure.

[0015] Additional advantages, objects, and features of the application will be set forth in part by the description that follows, and in part will become apparent to those skilled in the art upon examination of the following specification or can be learned by the practice of the application. The objects and other advantages of the application can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] To make the objectives, technical solutions and beneficial effects of the present application clearer, the present application provides the following drawings for description:

[0017] Figure 1 It is the overall schematic view of the base reinforcing structure of the embodiment of the present application;

[0018] Figure 2 It is the sectional view of the base reinforcing structure of the embodiment of the present application;

[0019] Figure 3 It is the structural schematic view of the transverse steel bar of the embodiment of the present application;

[0020] Figure 4 It is the structural schematic view of the steel ring of the embodiment of the present application;

[0021] Figure 5 It is the detail schematic view of the inclined plate of the embodiment of the present application;

[0022] Figure 6 It is the detail schematic view of the sliding seat body of the embodiment of the present application;

[0023] The following are marked in the attached diagram: 1. Arc-shaped plate; 2. Support frame; 21. Support foot; 211. Upper column; 212. Base platform; 213. Long steel bar; 22. Diagonal support rod; 23. Horizontal support rod; 24. Inclined plate; 25. Sliding seat; 3. Outer shell; 4. Horizontal steel bar; 41. Steel bar; 42. Stop block; 43. Spring; 5. Steel bar ring; 51. Arc-shaped steel bar; 52. Sliding block; 6. Concrete ring; 7. Fixing strip; 71. Locking screw; 8. Concrete foot; 9. Sealing strip. Detailed Implementation

[0024] like Figures 1-6 As shown, this invention discloses a ring-shaped concrete strip wind turbine foundation reinforcement structure, comprising three external support parts. This structure is attached to the wind turbine foundation through on-site installation and casting. Figure 1 and Figure 2 As shown, the external support includes an arc-shaped plate 1 and a support frame 2. The arc-shaped plate 1 is an arc-shaped steel plate with an arc angle of 120°, formed by die casting. Three of the arc-shaped plates 1 are installed around the outside of the wind turbine foundation to form a cylindrical outer shell 3. Adjacent arc-shaped plates 1 are connected by a fixing structure, such as... Figure 1 and Figure 5 As shown, the inner side of the arc-shaped plate 1 is provided with several transverse steel bars 4 that abut against the side of the wind turbine and several steel bar rings 5 ​​that surround the outside of the wind turbine. The extension direction of the transverse steel bars 4 is parallel to the radial direction of the outer shell 3. There are several groups of transverse steel bars 4. In a single group of transverse steel bars 4, each transverse steel bar 4 is distributed around the inner side of the outer shell 3. Each group of transverse steel bars 4 is arranged in an array along the axial direction of the outer shell 3. Each transverse steel bar 4 abuts against the outside of the wind turbine foundation. Several steel bar rings 5 ​​are placed on the upper side of each layer of transverse steel bars 4 and bound by steel wire. After the outer shell 3 is installed, concrete is poured between the outer shell 3 and the wind turbine foundation. After the concrete solidifies, it forms a concrete ring 6. Figure 1 As shown, the support frame 2 is fixed to the outside of the arc plate 1. The support frame 2 is a triangular support structure, mainly made of cast steel. The support frame 2 extends support legs 21 diagonally downwards. The support legs 21 are inserted diagonally into the ground. Through the insertion of the three support legs 21, the entire reinforced structure forms a claw-shaped gripping support structure.

[0025] In the scheme, the bottom outer side of the wind power generator base is further reinforced by more than three external support parts, a cylindrical shell 3 is formed by surrounding a plurality of arc-shaped plates 1, a pouring gap is formed between the shell 3 and the wind power generator base, a plurality of layers of transverse steel bars 4 and steel rings 5 are arranged between the pouring gaps, and then concrete is poured, after the concrete is solidified, a tight and thick wrapping structure surrounding the outer side of the wind power generator base is formed, if necessary, the outer side of the wind power generator base is chiseled to strengthen the connecting force between the solidified concrete ring 6 and the base; the reinforcing structure has a repairing effect on the outer side cracks of the wind power generator base, and the outer diameter of the reinforced wind power generator base is larger, which can have stronger structural bearing capacity; further, the claw-shaped gripping structure is inserted into the ground to provide more external support points for the wind power generator base, reduce the shaking of the wind power generator, avoid the deflection of the wind power generator, and also improve the upward lifting of the wind power generator under the influence of strong wind, the structure is simple to install, stable in structure, has bearing capacity of anti-deflection, anti-cracking and anti-uplift, can retain the original wind power generator structure, and reduces economic expenditure.

[0026] In a further scheme, as shown in Figure 3 The transverse steel bar 4 includes two steel bars 41, the end of the steel bar 41 is provided with a stop block 42, a circular hole is formed in the stop block 42, the two steel bars 41 pass through the circular hole in the stop block 42, one end of one of the steel bars 41 is fixed to the inner side of the arc-shaped plate 1, a spring 43 is arranged between the inner side of the arc-shaped plate 1 and the stop block close to the side surface of the arc-shaped plate 1, the length of the steel bar 41 is fixed, the steel bar 41 is cut into a long strip with the same length, the stop block 42 is formed by pouring, and the stop block 42, the steel bar 41 and the inner side of the arc-shaped plate 1 are welded together.

[0027] In this design, the structure of spring 43 and double steel bars 41 makes the transverse steel bars 4 a retractable steel structure to fit the conical foundation of the wind turbine. Since the outer shell 3 is a cylindrical structure while the foundation is conical, and the outer side of the foundation needs to be roughened, and the distance tolerance between the conical foundation and the outer shell 3 is uncertain, it would be very difficult, complicated and time-consuming to directly cut steel bars 41 of the same length to abut against the side of the foundation. Therefore, by setting several steel bars 41 of the same length and spring 43, the transverse steel bars 4 are set as a retractable steel structure that can elastically extend outward. When the arc plate 1 is fixed to the outside of the foundation, the transverse steel bars 4 abut against the outside of the foundation. When the arc plate 1 is connected, several transverse steel bars 4 are compressed at the same time. By setting this structure, the problem of the difficulty in setting and processing the length of the transverse steel bars 4 is solved. In addition, during the solidification process, this structure interlocks with each other and has a good skeleton effect. The transverse steel bars 4 are not affected by the conical foundation and always abut against the outside of the foundation, so that the concrete ring 6 has better overall stability.

[0028] In further proposals, such as Figure 4 As shown, the reinforcing bar ring 5 is divided into three arc-shaped reinforcing bars 51, the radii of the three arc-shaped reinforcing bars 51 increase sequentially, and each arc-shaped reinforcing bar 51 is provided with a slider 52 at its end. The slider 52 has a round hole, and the tail ends of the three arc-shaped reinforcing bars 51 slide into the round hole on the slider 52. The arc-shaped reinforcing bars 51 are connected end to end to form the reinforcing bar ring 5.

[0029] In this structure, the curved steel bar 51 is provided with a retractable and extendable curved steel bar structure to facilitate the installation of the steel bar ring 5 between the curved plates 1. When one curved plate 1 is installed, the retractable steel bar ring 5 can be fixed to the transverse steel bar 4 of each layer. As the next curved plate 1 is installed, the curved steel bar 51 is pulled out and fixed, finally forming the steel bar ring 5 structure. This steel bar ring 5 is used to adapt to the installation method of this curved plate 1. It can be directly installed around the outside of the foundation seat ring from the side of the foundation seat. This structure is easy to handle and install. After the concrete ring 6 solidifies, the steel bar ring 5 forms a good skeleton support.

[0030] In a further embodiment, a fixing strip 7 is also included, which covers the contact position of adjacent arc-shaped plates 1. The fixing strip 7 is provided with a plurality of locking screws 71, and the fixing strip 7 connects the connected arc-shaped plates 1 through the locking screws 71.

[0031] The fixing strip 7 is used to firmly connect each arc plate 1 to ensure that when the concrete ring 6 solidifies, the outer shell 3 is not subjected to expansion damage due to the pressure of the concrete ring 6 and the supporting force of the transverse steel bar 4. It can also ensure that the gaps between the arc plates 1 are sealed and form a good pouring gap.

[0032] Further, as shown in Figure 2 , Figure 5 and Figure 6 , the support frame 2 comprises an inclined support rod 22, a horizontal support rod 23 and an inclined plate 24, the inner end of the inclined support rod 22 is fixed to the top side of the middle part of the outer side of the arc-shaped plate 1, the inner end of the horizontal support rod 23 is fixed to the bottom side of the middle part of the outer side of the arc-shaped plate 1, the outer ends of the inclined support rod 22 and the horizontal support rod 23 are fixed to the inclined plate 24, the inclination angle of the inclined plate 24 is the same as the inclination angle of the support leg 21, the upper end of the support leg 21 is fixed with a sliding seat 25, the sliding seat 25 is slidingly clamped on the inclined plate 24, and the sliding seat 25 is supported on the outer side of the inclined plate 24.

[0033] In this structure, by arranging the inclined support rod 22 and the horizontal support rod 23 and fixing them through the inclined plate 24, the inclined support rod 22 can support the deflection of the wind turbine foundation around the base, and the horizontal support rod 23 can support the horizontal expansion of the wind turbine foundation, effectively avoiding the expansion damage of the concrete ring 6. Furthermore, through the inclined support rod 22 and the horizontal support rod 23, the entire reinforcing structure forms a stable triangular support, and by arranging the inclined plate 24 and the sliding seat, the support leg 21 can be installed first after the installation of the arc-shaped plate 1, and the insertion position of the support leg 21 is determined after the fixation of the arc-shaped plate 1, thereby improving the installation convenience of the fixed structure.

[0034] Further, as shown in Figure 2 and Figure 6 , the support leg 21 comprises an upper column 211 in the shape of a circular tube, a disc-shaped bottom platform 212 is fixed to the lower end of the upper column 211, a plurality of long steel bars 213 are fixed to the lower side of the bottom platform 212, and a plurality of sink holes with diameters larger than that of the bottom platform 212 are formed at the positions of the support leg 21 on the ground where the wind turbine foundation is located; the bottom platform 212 and the long steel bars 213 are inserted into the sink holes, and the sink holes are filled with concrete to form a concrete leg 8.

[0035] After the installation of the arc-shaped plate 1, the ground is perforated along the position of the inclined plate 24, then the entire support leg 21 is inserted into the sink hole by moving the sliding seat downward, and finally the pouring of the concrete leg 8 can be performed, the long steel bars 213 and the bottom platform 212 immersed in the concrete can be fixed well after the solidification of the concrete leg 8, so that the concrete leg 8 has better supporting, gripping and anti-damage capabilities.

[0036] Further, a sealing strip 9 is also included, which is fixed around the bottom end of the outer shell 3. By arranging the sealing strip 9, the pouring gap of the concrete ring 6 is sealed, and the outer shell 3 and the base of the wind turbine foundation are not subject to liquid leakage.

[0037] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A reinforcement structure for a ring-shaped concrete belt wind turbine foundation, characterized in that: The system includes three or more external support components, each comprising an arc-shaped plate (1) and a support frame (2). All the arc-shaped plates (1) surround the outside of the wind turbine foundation, forming a cylindrical outer shell (3). The inner side of each arc-shaped plate (1) is provided with several transverse steel bars (4) that abut against the side of the wind turbine, and several steel bar rings (5) that surround the outside of the wind turbine. Concrete is poured between the outer shell (3) and the wind turbine foundation to form a concrete ring (6). The support frame (2) is fixed to the outside of the arc-shaped plate (1), and the support frame (2) extends downward at an angle with support feet (21) that are inserted into the ground at an angle. The transverse steel bars (4) comprise two steel bars (41). (41) has a stop block (42) at its end, and a round hole is opened on the stop block (42). Two steel bars (41) pass through the round hole on the stop block (42) and one of the steel bars (41) is fixed at its end to the inner side of the arc plate (1). A spring (43) is provided between the inner side of the arc plate (1) and the stop block near the side of the arc plate (1). The steel ring (5) is divided into several arc steel bars (51). The ends of the arc steel bars (51) are provided with sliders (52). A round hole is opened on the sliders (52). The tail ends of several arc steel bars (51) slide into the round hole on the sliders (52). Several arc steel bars (51) are connected end to end to form the steel ring (5). The support frame (2) includes a fixing strip (7) that covers the contact position of adjacent arc plates (1). The fixing strip (7) is provided with several locking screws (71), and the fixing strip (7) connects the connected arc plates (1) through the locking screws (71). The support frame (2) includes a diagonal support rod (22), a horizontal support rod (23), and a diagonal plate (24). The inner end of the diagonal support rod (22) is fixed to the top side of the outer middle of the arc plate (1), and the inner end of the horizontal support rod (23) is fixed to the bottom side of the outer middle of the arc plate (1). The outer ends of the diagonal support rod (22) and the horizontal support rod (23) are simultaneously fixed to the diagonal plate (24). The inclination angle of the diagonal plate (24) is related to the support foot (…). 21) The inclination angle is the same. The upper end of the support foot (21) is fixed with a sliding seat (25). The sliding seat (25) is slidably locked on the inclined plate (24). The sliding seat (25) is supported on the outside of the inclined plate (24). The support foot (21) includes a cylindrical upper column (211). The lower end of the upper column (211) is fixed with a disc-shaped base (212). Several long steel bars (213) are fixed on the lower side of the base (212). Several countersunk holes with a diameter larger than the base (212) are opened at the position of the support foot (21) on the ground where the wind turbine foundation is located. The base (212) and the long steel bars (213) extend into the countersunk holes. Concrete is poured into the countersunk holes to form a concrete foot (8).

2. The annular concrete belt wind turbine foundation reinforcement structure according to claim 1, characterized in that: It also includes a sealing strip (9), which is fixed around the bottom of the housing (3).

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