Prestress anchoring structure of wind power tower foundation

Abstract

The invention relates to a wind power tower, in particular to a wind power tower foundation prestressed anchoring structure, which is characterized in that an embedded pipe which is arranged from top to bottom and penetrates through an anchoring table body is embedded in an anchoring table suspended on the inner side of a tower bottom foundation, the lower end of the embedded pipe is connected with an integrally tubular anchor seat, and the pipe core directions of the embedded pipe and the anchor seat are consistent; an anchor ring is arranged at the position, located in a pipe opening area, of the lower end of the anchor seat, a sleeve is sleeved outside a wire body of the steel strand, the lower end of the sleeve abuts against the anchor ring, a first sealing ring is arranged between an upper end pipe opening of the sleeve and the peripheral wall of the steel strand to form sealing fit, and the height of the upper end face of sealing filler poured into a pipe cavity of the anchor seat is lower than that of the first sealing ring. Water sprayed and hung on the steel strand is effectively prevented from sliding to the exposed section of the core body at the anchor ring position along the wire body or the sleeve, the anti-corrosion sealing effect on the exposed section is ensured, and meanwhile the single steel strand is convenient to replace.

Description

Technical Field

[0001] The invention relates to a wind power tower, and in particular to a prestressed anchoring structure of a wind power tower foundation. Background Art

[0002] Wind turbine towers mostly adopt steel-concrete structure, which uses concrete tower at the lower part of the tower body and steel tower at the upper part. The concrete tower is prefabricated in sections and assembled and hoisted on site. After hoisting, prestressing is applied to the entire concrete tower through steel strands to form a whole and improve the bending resistance of the assembled tower body.

[0003] like Figure 1 As shown, the tower body 1 is assembled from multiple tower sections and is installed on the tower base A. The steel strand B is installed between the tower top and the anchor platform A1 inside the tower base A and is tensioned. The anchor platform A1 is provided with a reserved channel for the steel strand B to pass through, so that the lower end of the steel strand B is anchored to the anchor 2 below the anchor platform A1. Figure 2 As shown, in the prior art, the PE sheath B2 on the portion of the wire body near the lower end of the steel strand B near the anchor 2 needs to be stripped off, so that the exposed section B1 of the steel strand core that has been stripped off can be clamped and fixed by a clip provided in the cable hole on the anchor 2 to prevent the steel strand B from loosening.

[0004] Because tower body 1 is assembled from multiple tower sections, adjacent tower sections often have large seams between them. During windy and rainy weather, rainwater from the outside environment often blows into tower body 1 through these seams and drips onto steel strands B. As water droplets accumulate on strands B, gravity forces them to slide down along them until they reach anchor 2 below anchor platform A1. Because the PE sheath B2 of strand B is peeled off at this point, the water droplets seep through the seams and come into contact with the exposed strand core section B1, gradually corroding strand B and severely shortening its service life.

[0005] The patent document entitled "Anchor" (publication number CN200999420Y, hereinafter referred to as Document 1) is the applicant's prior application. In the technical solution disclosed therein, the end of the steel strand is clamped by a clip, the tapered outer wall of the clip cooperates with the tapered hole opened on the anchor ring, the anchor ring is fixed on the cast iron anchor seat, the inner side of the anchor seat is connected to a polypropylene trumpet-shaped tube, the inner side of the polypropylene trumpet-shaped tube is connected to a plastic bellows, and the cavity between the polypropylene trumpet-shaped tube, the bellows, the anchor ring and the anchor seat is filled with filler. This solution can effectively avoid corrosion of components, thereby effectively improving service life and reliability.

[0006] In Document 1, filler is injected into the cavity of the bellows or anchor seat to prevent rainwater from sliding down the steel strands and contacting their exposed core. However, during the operation and maintenance of wind turbine towers, the natural corrosion of each strand varies, often requiring individual replacement of some strands. The filler in Document 1 is directly wrapped around the outer wall of the strands after solidifying. When a strand needs to be replaced, the solidified filler exerts a strong binding force on the strand, making it difficult to extract the strand from the filler, necessitating the destruction of the filler. This is particularly difficult due to the spatial limitations of the anchor structure and can easily cause irreversible damage to strands that do not need replacement. Furthermore, the destructive force of the filler during destruction essentially negates its anti-corrosion sealing effect on all strands, necessitating the refilling and waiting for it to solidify again. This process is both costly and time-consuming, significantly delaying construction progress. Summary of the Invention

[0007] The present invention provides a prestressed anchoring structure for a wind turbine tower foundation, which allows steel strands to be replaced individually without damaging sealing fillers, thereby ensuring waterproof sealing of exposed sections of the steel strand core and improving the efficiency of steel strand replacement construction.

[0008] In order to achieve the above-mentioned purpose, the technical solution adopted is: a prestressed anchoring structure for the foundation of a wind turbine tower, in which an embedded pipe arranged from top to bottom and passing through the body of the anchoring platform is embedded in the anchoring platform suspended on the inner side of the bottom foundation of the tower, the lower end of the embedded pipe is connected to an anchor seat which is an overall tubular shape and the directions of the tube cores of the two are consistent, and an anchor ring is provided at the lower end of the anchor seat at the position of the pipe mouth area, the steel strand is passed through the embedded pipe, the anchor seat and the corresponding cable holes on the anchor ring and the exposed section of the core of the steel strand is fixed by a clip provided in the cable hole, the anchor seat is also provided with a bypass hole which is connected to the central tube cavity and is used to inject a sealing filler into the tube cavity, the wire body of the steel strand is covered with a sleeve, the lower end of the sleeve is against the anchor ring, and a first sealing ring is provided between the upper end pipe mouth of the sleeve and the outer peripheral wall of the steel strand to form a sealing fit, and the upper end face height of the sealing filler injected into the tube cavity of the anchor seat is lower than the first sealing ring.

[0009] Compared with the prior art, the technical effect of the present invention is as follows: a casing is provided on the outer layer of the steel strand, and the casing is used to isolate the sealing filler from the wire body of the steel strand, so that a seal is formed between the sealing filler and the outer wall of the casing. In addition, the lower end of the casing abuts against the anchor ring, and the upper end of the casing is sealed with the outer peripheral wall of the steel strand, thereby effectively preventing water dripping onto the steel strand along the wire body or the casing from sliding onto the exposed section of the core at the anchor ring position, thereby ensuring the anti-corrosion sealing effect of the exposed section. In addition, when a single steel strand needs to be replaced, since the steel strand is not directly wrapped by the sealing filler, there is no need to destroy the sealing filler or move the casing for displacement. It is only necessary to pull the steel strand out of the casing, replace it, and add the first sealing ring, which greatly facilitates the replacement operation of the steel strand. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is an overall schematic diagram of a wind power tower in the prior art;

[0011] Figure 2 This is a schematic diagram of the anchoring structure at the bottom of a wind power tower in the prior art;

[0012] Figure 3 is a structural schematic diagram of a first embodiment of the present invention;

[0013] Figure 4 for Figure 3 Schematic diagram of some structures in ;

[0014] Figure 5 Schematic diagram of the structure of the first sealing ring;

[0015] Figure 6 is a schematic diagram of a first embodiment of a first sealing ring;

[0016] Figure 7 is a schematic diagram of a second embodiment of the first sealing ring;

[0017] Figure 8 Schematic diagram of the second sealing ring;

[0018] Figure 9 Schematic diagram of the wire separation ring;

[0019] Figure 10 Schematic diagram of the positioning plate;

[0020] Figure 11 FIG. 2 is a schematic structural diagram of a second embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-11 And related content, the present invention is further described in detail:

[0022] Here is a supplementary explanation of the structure of the steel strand B. The steel strand B consists of an internal core B3 and an external sheath B2. The sheath B2 protects the internal core B3. However, when using an anchor to anchor the steel strand B, it is necessary to cut off a length of the sheath B2 at the upper and lower ends of the steel strand B to expose the internal core B3. The exposed section B1 of the core can be clamped by the clips on the anchor to achieve the anchoring operation of the steel strand B.

[0023] Example 1

[0024] A prestressed anchoring structure for a wind power tower foundation, wherein an embedded pipe 10 arranged from top to bottom and passing through the anchor platform A1 is embedded in an anchor platform A1 suspended on the inner side of the tower bottom foundation A, and the lower end of the embedded pipe 10 is connected to an anchor seat 20 which is an overall tubular shape and the directions of the tube cores of the two are consistent, and an anchor ring 30 is provided at the lower end of the anchor seat 20 at the position of the pipe mouth area, and the steel strand B is passed through the embedded pipe 10, the anchor seat 20 and the corresponding cable holes 31 on the anchor ring 30 and is provided in the cable holes 31. The clip fixes the exposed core section B1 of the steel strand B. The anchor seat 20 is also provided with a bypass hole 21 connected to the central lumen and used for pouring a sealing filler C into the lumen. A sleeve 40 is sheathed on the wire body of the steel strand B. The lower end of the sleeve 40 abuts against the anchor ring 30. A first sealing ring 50 is provided between the upper end of the sleeve 40 and the outer peripheral wall of the steel strand B to form a sealing fit. The upper end surface height of the sealing filler C poured into the lumen of the anchor seat 20 is lower than the first sealing ring 50.

[0025] In the above technical solution, a sleeve is installed outside the steel strand B, and the sleeve 40 is used to isolate the sealing filler C from the strand B. After the sealing filler C solidifies, it tightly adheres to the outer wall of the sleeve 40, forming a seal between the sealing filler C and the outer wall of the sleeve 40. In addition, the lower end of the sleeve 40 abuts the anchor ring 30, and the upper end of the sleeve 40 is sealed with the outer wall of the steel strand B by the first sealing ring 50. Water that drips onto the strand B above the sleeve 40 slides down along the steel strand B, passes through the first sealing ring 50, and then slides onto the outer wall of the sleeve 40 instead of entering the sleeve 40. When the water droplets continue to slide down on the sleeve 40, due to the seal formed between the sealing filler C and the outer wall of the sleeve 40, the water droplets will be isolated on the sealing filler C and cannot continue to slide down along the outer wall of the sleeve 40, and further cannot slide onto the exposed core section B1 at the lower end of the steel strand B to contact and corrode the exposed core section B1, thereby achieving the effect of anti-corrosion sealing.

[0026] When a single steel strand B needs to be replaced, since the steel strand B is not in direct contact with the sealing filler C, the sleeve 40 can remain stationary, and there is no need to destroy the sealing filler C. The sealing setting between the sleeve 40 and the sealing filler C remains effective. It is only necessary to cancel the clamping and fixation of the steel strand B by the clip, and pull the steel strand B out of the anchor ring 30 and the sleeve 40. The first sealing ring 50 can also be removed from the old steel strand B. Then the new steel strand B is reinserted into the sleeve 40 and fixed again with the clip. Of course, when the new steel strand B is inserted, the first sealing ring 50 also needs to be put on again to seal the upper end of the sleeve 40 and the outer wall of the steel strand B. In this solution, without destroying the sealing filler C and ensuring the seal, it brings great convenience to the single steel strand replacement operation.

[0027] It should be noted that this solution is aimed at the lower end anchoring solution of the steel strand B. As for the anchoring solution of the steel strand B at the top of the tower, no further explanation will be given here, and normal anchoring tools can be used for anchoring.

[0028] As a preferred solution, a sealing filler C composed of concrete or sealant is poured into the lumen of the anchor seat 20. After the concrete or sealant solidifies, it can tightly wrap around the sleeve 40, and an effective sealing and fitting effect can be achieved between the two.

[0029] Combine Figure 4 As shown, the bypass hole 21 serves as a channel for injecting a sealing filler C into the lumen of the anchor base 20. The outlet of the bypass hole 21 is located on the inner wall of the lumen of the anchor base 20 and is positioned higher than the lower end surface of the anchor base 20. The inlet of the bypass hole 21 is located on the lower end surface of the anchor base 20. The upper end surface of the sealing filler C is located between the upper and lower edges of the bypass hole 21 outlet or is flush with the lower edge. In this embodiment, the lower end opening of the bypass hole 21 serves as the inlet, and the upper end opening serves as the outlet. The sealing filler C can be injected into the lumen of the anchor base 20 through the bypass hole 21 to form a certain thickness. Here, the upper end surface of the sealing filler C is controlled to be between the upper and lower edges of the bypass hole 21 outlet or flush with the lower edge. In this way, when water attached to the outer wall of the sleeve 40 slides down to the upper end surface of the sealing filler C, the water can be discharged through the bypass hole 21, thereby preventing water from accumulating in the anchor seat 20 or the embedded pipe 10. Of course, under normal circumstances, even without the bypass hole 21 to drain water, not much water will accumulate. The accumulated water can be gradually eliminated through natural evaporation. However, the evaporation speed of the accumulated water is slow, which may affect the service life of the structure. Therefore, the bypass hole 21 is used not only as a pouring channel, but also as a drainage channel.

[0030] As a preferred solution, Figure 3As shown, the upper end of the sleeve 40 extends upward to the outside of the lumen of the embedded pipe 10. The space outside the lumen of the embedded pipe 10 is large, which can facilitate the sealing operation between the upper end of the sleeve 40 and the steel strand B.

[0031] Combine Figure 3 、 Figure 5 as well as Figure 6 As shown, the first sealing ring 50 includes a small-aperture section 51 and a large-aperture section 52 connected as a whole from top to bottom. The inner wall joint of the small-aperture section 51 and the large-aperture section 52 is transitionally connected by a step surface 53. The upper end of the sleeve 40 is inserted into the large-aperture section 52, and the inner wall of the small-aperture section 51 is sealed against the outer peripheral wall of the steel strand B.

[0032] In this solution, the small-diameter section 51 is snugly mounted on the outside of the steel strand sheath B2, achieving a seal between the first sealing ring 50 and the steel strand B. The large-diameter section 52 is snugly mounted on the outside of the casing 40, achieving a seal between the first sealing ring 50 and the casing 40. As a result, when water on the steel strand B slides down to the first sealing ring 50, it will not enter the first sealing ring 50 and the interior of the casing 40, thereby preventing water on the steel strand B from sliding along the strand and onto the exposed core section B1.

[0033] Furthermore, a radially inwardly protruding sealing bead 511 is provided on the inner peripheral wall of the small-diameter section 51, and the sealing bead 511 forms a pressing seal with the outer peripheral wall of the steel strand B. The sealing bead 511 presses tightly against the outer peripheral wall of the steel strand sheath B2 to ensure a sealing effect.

[0034] In addition, in this application, another sealing method between the upper end of the casing 40 and the steel strand B is provided, such as Figure 7 As shown, the first sealing ring 50 is placed on the outer wall of the steel strand B above the sleeve 40. The lower end surface of the first sealing ring 50 abuts against the upper end surface of the sleeve 40. A tubular sealing protective sleeve 54 is placed on the upper end of the sleeve 40. The inner wall of the upper end of the sleeve 54 protrudes inward to form a step 541. The upper end surface and outer peripheral surface of the first sealing ring 50 abut against the lower end surface of the step 541 and the inner peripheral wall of the sealing protective sleeve 54, respectively, to form a seal. The first sealing ring 50 abuts against the outer wall of the steel strand B, the inner peripheral wall of the sealing protective sleeve 54, and the lower end surface of the step 541 to effectively seal the upper end of the sleeve 40. The first sealing ring 50 is housed within the sealing protective sleeve 54. The provision of the sealing protective sleeve 54 prevents the first sealing ring 50 from being directly exposed to the external environment, reduces the aging and corrosion rate of the first sealing ring 50, and prolongs its service life.

[0035] It should be noted that when the first sealing ring 50 is configured as a single piece with a small-diameter section 51 and a large-diameter section 52, a sealing protective sleeve 54 can be placed over the first sealing ring 50 to house it. The specific shape of the sealing protective sleeve 54 is not particularly limited, as long as it can accommodate the first sealing ring 50. Of course, the aforementioned tubular sealing protective sleeve 54 is also acceptable, though the shape would require slight modification to better match the shape of the first sealing ring 50.

[0036] As a preferred solution, combined Figure 4 as well as Figure 8 As shown, the upper opening of the cable hole 31 on the anchor ring 30 is a stepped hole with a larger outer diameter and a smaller inner diameter. A second sealing ring 60 is sleeved over the strand B within the stepped hole. The lower end of the sleeve 40 is inserted into the cable hole 31, and the lower end surface of the sleeve 40 abuts against the second sealing ring 60 to form a sealed fit. In this solution, the provision of the second sealing ring 60 provides a more secure waterproofing solution. That is, if a gap forms between the outer wall of the sleeve 40 and the sealing filler C, the provision of the second sealing ring 60 ensures that water that penetrates through the gap will not enter the sleeve 40 through the lower end of the sleeve 40 and contact the exposed core section B1 of the steel strand B. The dual provision of the second sealing ring 60 and the sealing filler C provides a more effective sealing protection for the lower end of the sleeve 40.

[0037] Further, combined with Figure 10 As shown, the lower ends of the sleeves 40 are commonly connected to a positioning plate 80 , which is in the shape of a porous disc. The sleeves 40 are inserted into the holes on the positioning plate 80 and the lower end surfaces of the sleeves 40 are located below the positioning plate 80 .

[0038] Considering the inconvenience of inserting the sleeves 40 one by one into the cable insertion hole 31, this solution uses a positioning plate 80 as a connector to pre-connect the sleeves 40 to form a single unit. During installation, all sleeves 40 can be inserted simultaneously into the pre-buried pipe 40. Because the lower end of the sleeve 40 is located below the positioning plate 80, the lower end of the sleeve 40 protruding from the positioning plate 80 serves as a positioning reference for alignment with the cable insertion hole 31.

[0039] It should be noted that the overall hole distribution on the positioning plate 80 is consistent with the hole distribution of the cable holes 31 on the anchor ring 30 to ensure that all sleeves 40 can be accurately inserted into the corresponding cable holes 31.

[0040] like Figure 6 As shown, in order to facilitate the replacement of the steel strand B, the inner wall of the sleeve 40 is spaced apart from the outer wall of the steel strand B. The sleeve 40 is not tightly sleeved on the outer wall of the steel strand sheath B2, which makes it more convenient to remove or insert the steel strand B from the sleeve 40.

[0041] like Figure 3 As shown, in order to provide corrosion-resistant sealing for the exposed core section B1 exposed below the anchor ring 30, an anti-corrosion cover 32 is connected to the lower end surface of the anchor ring 30. The exposed core section B1 is located in the anti-corrosion cover 32 and the anti-corrosion cover 32 is filled with anti-corrosion filler, thereby protecting the exposed core section B1 and preventing water vapor in the external environment from directly contacting the exposed core section B1.

[0042] As a preferred solution, Figure 3 and Figure 9 As shown, a columnar wire splitter 70 is provided in the embedded tube 10, and a through hole 71 is provided on the wire splitter 70 for the sleeve 40 to pass through. The wire splitter 70 is located at the upper end of the embedded tube 10, and the outer peripheral surface of the wire splitter 70 abuts against the inner wall of the embedded tube 10. In this solution, the purpose of providing the wire splitter 70 is to support and position the upper end of each sleeve 40, ensure the overall posture stability of the sleeve 40 in the embedded tube 10, and prevent the sleeve 40 from vibrating significantly and affecting the sealing effect between it and the sealing filler C. This is because during the use of the wind tower, the steel strand B has a linear vibration phenomenon, and the vibration of the steel strand B will be transmitted to the sleeve 40.

[0043] Example 2

[0044] A prestressed anchoring structure for a wind power tower foundation, wherein an embedded pipe 10 arranged from top to bottom and passing through the anchor platform A1 is embedded in the anchor platform A1 suspended on the inner side of the tower bottom foundation A, and the lower end of the embedded pipe 10 is connected to an anchor seat 20 which is an overall tubular shape and the directions of the tube cores of the two are consistent, and an anchor ring 30 is provided on the lower end surface of the anchor seat 20, and the steel strand B is passed through the embedded pipe 10, the anchor seat 20 and the corresponding cable holes 31 on the anchor ring 30 and is aligned with the clamp provided in the cable hole 31. The exposed core section B1 of the steel strand B is fixed, and is characterized in that: a sleeve 40 is provided on the wire body of the steel strand B, the upper end of the sleeve 40 extends to the outside of the tube cavity of the embedded tube 10, and the lower end extends downward along the tube length direction of the embedded tube 10, and a first sealing ring 50 is arranged between the upper end pipe mouth of the sleeve 40 and the outer peripheral wall of the steel strand B to form a sealing fit, and a sealing filler C is provided in the upper end pipe mouth area of ​​the embedded tube 10 and the lower end surface of the sealing filler C is higher than the lower end pipe mouth of the sleeve 40.

[0045] Combine Figure 11As shown, the difference between the above technical solution and Example 1 is that the sealing filler C is not set in the tube cavity of the anchor seat 20, but is poured and formed at the upper end of the embedded tube 10. The principle is the same as that of Example 1, except that the position of the sealing filler C is different. In this solution, when pouring the sealing filler C, it is necessary to set a corresponding prefabricated component inside the tube mouth of the embedded tube 10, such as the wire ring 70 in Example 1, or arrange some plates to support the sealing filler C that has not yet solidified, so that the sealing filler C can solidify and form at the tube mouth. Of course, the setting scheme of the sealing filler C in this embodiment can also be used simultaneously with the setting scheme of the sealing filler C in Example 1 to ensure the sealing effect.

[0046] Finally, it should be noted that the anchoring structure of the present application is not limited to the prestressed anchoring system of the wind tower, but can also be applied to other similar prestressed anchoring systems.

Claims

1. A prestressed anchoring structure for a wind power tower foundation, wherein an embedded pipe (10) arranged from top to bottom and penetrating the anchoring platform (A1) is embedded in an anchoring platform (A1) suspended on the inner side of the tower bottom foundation (A), the lower end of the embedded pipe (10) is connected to an anchoring seat (20) which is tubular in shape as a whole and the directions of the pipe cores of the two are consistent, an anchor ring (30) is provided at the lower end of the anchoring seat (20) at the position of the pipe mouth area, a steel strand (B) is passed through the embedded pipe (10), the anchoring seat (20) and the corresponding cable holes (31) on the anchoring ring (30), and the exposed core section (B1) of the steel strand (B) is fixed by a clip provided in the cable hole (31), and the anchoring seat (20) is further provided with a bypass hole (21) which is connected to the central tube cavity thereof and is used for pouring a sealing filler (C) into the tube cavity, characterized in that: A sleeve (40) is provided on the wire body of the steel strand (B), the lower end of the sleeve (40) contacts the anchor ring (30), a first sealing ring (50) is provided between the upper end of the sleeve (40) and the outer peripheral wall of the steel strand (B) to form a sealing fit, and the upper end surface height of the sealing filler (C) poured into the lumen of the anchor seat (20) is lower than the first sealing ring (50).

2. The prestressed anchor structure for a wind turbine tower foundation according to claim 1, characterized in that: A sealing filler (C) composed of concrete or sealant is poured into the lumen of the anchor seat (20).

3. The prestressed anchor structure for a wind power tower foundation according to claim 2, characterized in that: The outlet of the bypass hole (21) is opened on the inner wall of the tubular cavity of the anchor seat (20) and the position of the outlet is higher than the lower end surface of the anchor seat (20), the inlet of the bypass hole (21) is located on the lower end surface of the anchor seat (20), and the upper end surface of the sealing filler (C) is between the upper edge and the lower edge of the outlet of the bypass hole (21) or is flush with the lower edge.

4. The prestressed anchor structure for a wind power tower foundation according to claim 1, characterized in that: The upper end of the sleeve (40) extends upward to the outside of the lumen of the embedded pipe (10).

5. The prestressed anchor structure for a wind power tower foundation according to any one of claims 1 to 4, characterized in that: The first sealing ring (50) comprises a small-diameter section (51) and a large-diameter section (52) connected as one piece from top to bottom. The inner wall joint of the small-diameter section (51) and the large-diameter section (52) is transitionally connected by a step surface (53). The upper end of the sleeve (40) is inserted into the large-diameter section (52). The inner wall of the small-diameter section (51) is sealed against the outer peripheral wall of the steel strand (B).

6. The prestressed anchor structure for a wind power tower foundation according to claim 5, characterized in that: A sealing convex ring (511) protruding radially inward is provided on the inner peripheral wall of the small-diameter section (51), and the sealing convex ring (511) and the outer peripheral wall of the steel strand (B) form a pressing sealing fit.

7. The prestressed anchor structure for a wind turbine tower foundation according to any one of claims 1 to 4, characterized in that: The first sealing ring (50) is sleeved on the outer wall of the steel strand (B) above the sleeve (40), and the lower end surface of the first sealing ring (50) is in contact with the upper end surface of the sleeve 40. A tubular sealing protective sleeve (54) is sleeved on the upper end section of the sleeve (40), and the inner wall of the upper end of the sealing protective sleeve (54) protrudes inward to form a step portion (541). The upper end surface and outer peripheral surface of the first sealing ring (50) are respectively in contact with the lower end surface of the step portion (541) and the inner peripheral wall of the sealing protective sleeve (54) to form a sealing fit.

8. The prestressed anchor structure for a wind power tower foundation according to claim 1 or 2, characterized in that: The upper end opening of the cable hole (31) on the anchor ring (30) is a stepped hole with a large outer end diameter and a small inner end diameter. A second sealing ring (60) is sleeved on the wire body of the steel strand (B) located in the stepped hole. The lower end of the sleeve (40) is inserted into the cable hole (31) and the lower end surface of the sleeve (40) abuts against the second sealing ring (60) to form a sealed fit.

9. The prestressed anchor structure for a wind power tower foundation according to claim 8, characterized in that: The lower ends of the sleeves (40) are commonly connected to a positioning plate (80), the positioning plate (80) is in the shape of a porous disk, the sleeves (40) are inserted into the holes on the positioning plate (80), and the lower end surface of the sleeves (40) is located below the positioning plate (80).

10. The prestressed anchor structure for a wind power tower foundation according to claim 1, characterized in that: The inner tube wall of the sleeve (40) and the outer peripheral wall of the steel strand (B) are spaced apart.

11. The prestressed anchor structure for a wind power tower foundation according to claim 1, characterized in that: An anti-corrosion cover (32) is connected to the lower end surface of the anchor ring (30), the exposed section (B1) of the core body is located in the anti-corrosion cover (32), and the anti-corrosion cover (32) is filled with an anti-corrosion filler.

12. The prestressed anchor structure for a wind power tower foundation according to claim 1, characterized in that: A columnar wire dividing ring (70) is provided in the embedded tube (10), and a through hole (71) is provided on the wire dividing ring (70) for the sleeve (40) to pass through. The wire dividing ring (70) is located at the upper end of the embedded tube (10), and the outer peripheral surface of the wire dividing ring (70) is against the inner wall of the embedded tube (10).

13. A prestressed anchoring structure for a wind power tower foundation, wherein a pre-buried pipe (10) arranged from top to bottom and penetrating the anchoring platform (A1) is pre-buried in an anchoring platform (A1) suspended on the inner side of the tower base (A), the lower end of the pre-buried pipe (10) is connected to an anchoring seat (20) which is tubular in shape as a whole and the directions of the pipe cores of the two are consistent, an anchor ring (30) is provided on the lower end surface of the anchoring seat (20), a steel strand (B) is passed through corresponding cable holes (31) on the pre-buried pipe (10), the anchoring seat (20) and the anchor ring (30), and the exposed core section (B1) of the steel strand (B) is fixed by a clip provided in the cable hole (31), characterized in that: A sleeve (40) is provided on the wire body of the steel strand (B), the upper end of the sleeve (40) extends to the outside of the tube cavity of the embedded tube (10), and the lower end extends downward along the tube length direction of the embedded tube (10), and a first sealing ring (50) is provided between the upper end pipe opening of the sleeve (40) and the outer peripheral wall of the steel strand (B) to form a sealing fit, and a sealing filler (C) is provided in the upper end pipe opening area of ​​the embedded tube (10), and the lower end surface of the sealing filler (C) is higher than the lower end pipe opening of the sleeve (40).

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