CN211873073U - Full-prestress anchor cable foundation for wind turbine tower - Google Patents

Abstract

The utility model provides a fan tower section of thick bamboo is prestressing force anchor rope basis entirely, the foundation has, it includes basic top surface, the basic side, bottom plate upper surface and bottom plate lower surface, wherein, be equipped with a plurality of top surface upper anchor rope holes and top surface lower floor's anchor rope hole that correspond each other along annular evenly distributed around its centre of a circle from extroversion to introversion on the basic top surface, be equipped with a plurality of side upper anchor rope holes corresponding with top surface upper anchor rope hole along the upper portion circumference on the basic side, be equipped with a plurality of side upper anchor rope holes that correspond with top surface lower floor's anchor rope hole along the lower part circumference. An upper prestressed anchor cable mechanism is arranged between the upper anchor cable hole on the top surface and the upper anchor cable hole on the side surface; and a lower-layer prestressed anchor cable mechanism is arranged between the upper-layer anchor cable hole on the top surface and the lower-layer anchor cable hole on the side surface. Through realizing the full prestressing force of tower section of thick bamboo basis, effectively avoid the basis fracture, avoid the fatigue failure that the fan load arouses, increased the durability and the reliability of basis.

Description

Full-prestress anchor cable foundation for wind turbine tower

Technical Field

The utility model relates to a wind power generation field specifically indicates a novel prestressed anchorage cable basis of fan tower section of thick bamboo.

Background

With the increasing development and utilization scale of world energy, the development and utilization of new energy are continuously and rapidly developed, wherein wind power generation is an important energy development mode and is widely utilized. The connection and fixation of the wind turbine tower and the installation foundation which are important facilities in wind power generation also become a key problem for erecting wind power facilities in different regional environments. At present, the connection between a wind turbine tower and a foundation comprises a foundation ring and an anchor bolt cage which are common modes, and the two modes have the following characteristics and problems.

Firstly, the foundation ring is a steel part embedded in the foundation concrete, is a transition member for connecting the foundation and the wind turbine tower, plays a key role in the foundation connection, and is shown in a common form in fig. 1. The wind load borne by the upper fan blades and the tower barrel structure and the self-weight of the upper fan blades and the tower barrel structure are transmitted to the foundation through the foundation ring, and the upper load is represented as large bending moment, torque, horizontal force and vertical force on the top surface of the foundation as shown in figure 1. Based on the mechanism and the stress condition, the fan has local pressure damage caused by stress concentration of the foundation near a foundation ring bottom flange and near the upper surface of the foundation ring in intersection due to the anchoring failure of the foundation ring.

Furthermore, as shown in fig. 2, the anchor cage is used to replace the foundation ring type structure, and is composed of an upper anchor plate, a lower anchor plate, an anchor bolt and the like. Because the anchor bolts are prestressed, the concrete foundation is always in a stressed state, so that stress concentration is avoided, and the condition that the concrete is damaged due to stress concentration caused by rigidity mutation at two sides of the foundation ring is avoided. However, the purchase price of the conventional anchor bolt cage is high, the processing period is long, the production quality problem of the anchor bolt exists in the application process, the basic connection structure of the fan tower barrel is broken due to the hydrogen brittleness, cracks, internal defects and the like of the anchor bolt body, equipment is seriously damaged, the anchor bolt is very difficult to replace in the conventional basic form, and great trouble is caused to the later maintenance of the engineering.

In order to solve the technical problems, the full-prestress anchor cable foundation for the wind turbine tower needs to be innovatively provided, the foundation cracking is effectively avoided by realizing the full prestress of the tower foundation, the fatigue damage caused by the wind turbine load is avoided, and the durability and the reliability of the foundation are improved. And the anchor cable can be conveniently replaced under the condition that the existing foundation structure is not damaged, so that the maintenance is facilitated, the construction amount is saved, and the economic benefit is improved.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide a fan tower section of thick bamboo is full prestressing force anchor rope basis promptly.

The technical means adopted by the utility model are as follows.

The utility model provides a fan tower section of thick bamboo is prestressing force anchor rope basis entirely has the basis, and it includes basic top surface, basic side, bottom plate upper surface and bottom plate lower surface, its characterized in that is equipped with a plurality of top surface upper anchor rope holes and top surface lower floor's anchor rope hole that correspond each other along annular evenly distributed around its centre of a circle from extroversion in on the above-mentioned basic top surface, is equipped with a plurality of side upper anchor rope holes corresponding with above-mentioned top surface upper anchor rope hole along the upper portion circumference on the above-mentioned basic side, on the above-mentioned basic side along the lower part circumference be equipped with a plurality of side lower floor's anchor rope holes that top surface lower floor's anchor rope.

And an upper prestressed anchor cable mechanism is arranged between the upper anchor cable hole on the top surface and the upper anchor cable hole on the side surface. And a lower-layer prestressed anchor cable mechanism is arranged between the top-surface lower-layer anchor cable hole and the side-surface lower-layer anchor cable hole.

The upper layer prestressed anchor cable mechanism and the lower layer prestressed anchor cable mechanism are both provided with at least one corner part, and the corner part is provided with a steering component. The steering member has a steering bracket and a steering ring, wherein the steering ring is connected to an upper portion of the steering bracket.

The upper layer pre-stressed anchor cable mechanism and the lower layer pre-stressed anchor cable mechanism respectively comprise an external channel and at least one pre-stressed anchor cable penetrating through the external channel.

The fully prestressed anchor cable foundation for the fan tower cylinder further has the following characteristics.

Further, the upper prestressed anchor cable mechanism includes an upper vertical anchor cable portion extending vertically downward from the upper anchor cable hole on the top surface and an upper parallel anchor cable portion extending upward from the upper anchor cable hole on the side surface in a direction parallel to the upper surface of the bottom plate; the lower end of the upper layer vertical anchor cable part and the upward inclined end of the upper layer parallel anchor cable part are connected with each other to form the corner part, and the corner part is provided with the steering component.

Further, the lower prestressed anchor cable mechanism includes a lower vertical anchor cable portion extending vertically downward from the top lower anchor cable hole, a lower parallel anchor cable portion extending inward from the side lower anchor cable hole in a direction parallel to the lower surface of the bottom plate, and a lower transition anchor cable portion. The lower end of the lower vertical anchor cable part is connected with the upward inclined end of the lower transition anchor cable part to form the corner part, and the corner part is provided with the steering component. The downward inclined end of the lower layer transition anchor cable part and the inner end of the lower layer parallel anchor cable part form a corner part, and the corner part is provided with the steering component.

Further, the length of the lower-layer transition anchor cable part is 2 m.

Further, the external channels of the upper layer pre-stressed anchor cable mechanism and the lower layer pre-stressed anchor cable mechanism are formed by corrugated pipes or PVC pipes.

The diameter of the circumference where the anchor cable hole on the upper layer of the top surface is located is 4430 mm-4530 mm. The diameter of the circumference where the anchor cable holes on the lower layer of the top surface are located is 4030-4130 mm. The diameter of the anchor cable hole on the upper layer of the top surface and the diameter of the anchor cable hole on the lower layer of the top surface are 24 mm-32 mm. The number of the anchor cable holes in the upper layer of the top surface and the number of the anchor cable holes in the lower layer of the top surface are 60-80.

The steering ring is further a steel ring with diameters of 4450mm, 4750mm and 7575mm and a wall thickness of 8-12 mm.

Furthermore, the upper layer pre-stressed anchor cable mechanism and the lower layer pre-stressed anchor cable mechanism are respectively provided with a shaping template at the corresponding positions of the fixed anchorage device at one end of the top surface of the foundation.

Furthermore, special-shaped anchorage devices are arranged at one ends of the upper layer prestressed anchor cable mechanism and the lower layer prestressed anchor cable mechanism, which are positioned on the side surface of the foundation.

Further, the prestressed anchor cable penetrating into the channel of the upper layer prestressed anchor cable mechanism and the lower layer prestressed anchor cable mechanism is one of steel stranded wires with the diameter of 10.8mm, 12.9mm, 9.5mm, 12.7mm, 15.2mm, 17.8mm and 21.6 mm. The number of prestressed anchor cables penetrating into the channels of the upper layer prestressed anchor cable mechanism and the lower layer prestressed anchor cable mechanism is 2-4.

The utility model discloses produced beneficial effect as follows.

The utility model discloses the innovation provides a fan tower section of thick bamboo is prestressing force anchor rope basis entirely has realized the basic prestressing force of a tower section of thick bamboo, effectively avoids basic fracture, avoids the fatigue failure that fan load arouses, has increased the durability and the reliability of basis, and it further still contains following beneficial effect.

1. Because the full prestressing anchor cable foundation of the wind turbine tower has no rigidity mutation, the problem of local stress concentration is effectively avoided.

2. The prestressed anchor cable is a common product in the existing market, is convenient to purchase, can effectively reduce the waiting period of purchase and processing compared with an anchor bolt cage and a foundation ring, and integrally promotes the progress of the project.

3. Compared with anchor bolts and foundation rings, the manufacturing cost of the prestressed anchor cables can be greatly reduced, so that the comprehensive manufacturing cost of the foundation is reduced.

4. The prestressed anchor cable is as common product in market, and the material reliability is more improved than the crab-bolt cage, effectively promotes the reliability of fan tower section of thick bamboo basis.

5. The anchor cable arrangement scheme of the full-prestress anchor cable foundation of the wind turbine tower can be matched with the reinforcement of the wind turbine foundation, so that reinforcement is distributed conveniently, the reinforcement distribution amount is reduced, and the comprehensive cost of the foundation is further reduced.

6. The anchor cable can be flexibly replaced through different embodiment structures, and the durability and reliability of the foundation are improved.

Drawings

FIG. 1 is a schematic view of a conventional wind turbine tower foundation ring connection structure.

FIG. 2 is a schematic view of a conventional wind turbine tower anchor bolt cage connection structure.

Fig. 3 is a schematic structural section of an embodiment of the foundation of the fully prestressed anchor cable for a wind turbine tower.

Fig. 4 is the schematic view of the second structural section of the embodiment of the foundation of the fully prestressed anchor cable for wind turbine tower.

Fig. 5 is the utility model discloses the schematic diagram is arranged to the upper prestressed anchorage cable on fan tower cylinder full prestressed anchorage cable basis.

Fig. 6 is the utility model discloses the schematic diagram is arranged to the full prestressed anchorage cable of lower floor on anchor cable basis of wind turbine tower section of thick bamboo.

Fig. 7 is the utility model discloses the basic ring structure that turns to of fan tower section of thick bamboo full prestressing force anchor rope sketch map.

Fig. 8 is the utility model discloses the stock form plate structure schematic diagram on fan tower section of thick bamboo full prestressing force anchor rope basis.

Detailed Description

With reference to the drawings, the following detailed description of the fully prestressed anchor cable foundation according to the present invention includes the following specific embodiments, structures, features and effects:

as shown in fig. 3 and 4, the two embodiments of the fully prestressed anchor cable foundation of the wind turbine tower according to the present invention have the same basic structure, specifically, as can be seen from the drawings, the foundation 100 includes a foundation top surface 101, a foundation side surface 102, a bottom plate upper surface 103 and a bottom plate lower surface 104. A plurality of top surface upper layer anchor cable holes 1011 and top surface lower layer anchor cable holes 1012 which are mutually corresponding and uniformly distributed along a ring shape are arranged on the base top surface 101 from outside to inside around the circle center. A plurality of side surface upper layer anchor cable holes 1021 corresponding to the top surface upper layer anchor cable holes 1011 are formed along the upper circumference of the base side surface 102. The base side 102 is provided with a plurality of side lower anchor cable holes 1022 corresponding to the top lower anchor cable holes 1012 along the lower circumference. An upper prestressed anchor cable mechanism 10 is arranged between the upper anchor cable hole 1011 on the top surface and the upper anchor cable hole 1021 on the side surface. A lower prestressed anchor cable mechanism 20 is disposed between the top lower anchor cable hole 1012 and the side lower anchor cable hole 1022. Wherein, the upper prestressed anchorage cable mechanism 10 and the lower prestressed anchorage cable mechanism 20 are both provided with at least one corner portion 30, and a steering component 40 is arranged at the corner portion 30. The steering assembly 40 has a steering bracket 41 and a steering ring 42, wherein the steering ring is connected to an upper portion of the steering bracket 41; the upper prestressed anchorage cable mechanism 10 and the lower prestressed anchorage cable mechanism 20 both include an external channel and at least one prestressed anchorage cable penetrating through the external channel. The prestressed anchor cable foundation structure realizes steering by matching the prestressed anchor cable with the steering ring 42 and the special-shaped anchorage device 60, the resultant force of the anchor cable at the steering ring 42 points to the circle center of the steering ring, namely the prestressed anchor cable and the steering ring 42 realize self-internal force balance, so that the base cracking caused by the resultant force of the prestressed anchor cable at the turning position is prevented, the fatigue damage is avoided, the base durability is improved, the tower barrel anchoring reliability is improved, and the manufacturing cost is reduced.

Based on the above basic structure, the external passages of the upper prestressed anchorage cable mechanism 10 and the lower prestressed anchorage cable mechanism 20 in the first embodiment shown in fig. 3 are formed by PVC pipes. The PVC pipe has smooth surface and is convenient to draw out; the PVC pipe can the grout material anchor rope in the middle section, has increased the anchor section in the anchor rope basis, and the anchor rope atress is more even, and fixed effect is better. The method specifically adopts the following implementation modes and steps.

1. According to different stress conditions in construction, a plurality of top surface upper-layer anchor cable holes 1011 and top surface lower-layer anchor cable holes 1012 which are mutually and correspondingly and uniformly distributed along a ring shape are arranged on the top surface 101 of the foundation from outside to inside around the circle center. While a plurality of side upper anchor cable holes 1021 corresponding to the top upper anchor cable holes 1011 are arranged along the upper circumference on the base side 102. A plurality of side lower cable holes 1022 corresponding to the top lower cable holes 1012 are circumferentially arranged on the base side 102 along the lower portion. The diameter of the circumference where the anchor cable hole 1011 on the upper layer of the top surface is located can be 4430 mm-4530 mm. The diameter of the circumference of the anchor cable holes 1012 on the top and lower layers can be 4030-4130 mm. The diameter of each of the top upper anchor cable holes 1011 and the top lower anchor cable holes 1012 is 24mm to 32 mm. The number of the top upper anchor cable holes 1011 and the top lower anchor cable holes 1012 is 60 to 80.

2. A basic reinforcement cage is erected and arranged, and four turning supports 41 are circumferentially arranged on each layer of the reinforcement cage or the cushion layer. The specific arrangement position is that four steering brackets 41 are arranged on each layer at the position of a corner part 30 formed by connecting the lower end of an upper layer vertical anchor cable part 11 vertically extending downwards from the upper layer anchor cable hole 1011 on the top surface and the upward inclined end of an upper layer parallel anchor cable part 12 extending upwards from the upper layer anchor cable hole 1021 on the side surface along the direction parallel to the upper surface 103 of the bottom plate. While four turning lugs 41 are arranged per layer at a turning part 30 formed by connecting the lower end of the lower vertical cable wire part 21 extending vertically downward from the upper-surface lower cable wire hole 1012 with the upwardly inclined end of the lower transition cable wire part 22. Four turning lugs 41 are then disposed in each tier at a corner 30 formed by the downwardly sloping end of the lower transition cable wire portion 22 and the inner end of the lower parallel cable wire portion 23 extending inwardly from the side lower cable wire holes 1022 in a direction parallel to the lower deck surface 104. In order to avoid the situation that the total angle is 90 degrees when the lower prestressed anchor cable mechanism 20 only performs one-time steering, the steering bearing capacity is reduced and the construction is inconvenient, the lower transition anchor cable part 22 is added, two-time steering is formed, and the bearing capacity is improved. Preferably, the length of the lower transition anchor cable part 22 is 2 m.

3. And a steering ring 42 is arranged on the steering support bracket 41 of each layer, wherein a single steering ring (shown in figure 7) can be a steel ring (the diameter of the steel ring can be determined according to the position of a specific anchor cable hole of the bottom plate of the fan tower barrel) with the diameter of 4450mm, 4750mm and 7575mm which is processed by Q235B and Q345B steel pipes (the specification and the model are selected according to the stress) with the diameter of phi 219 x 8-phi 230 x 10.

4. PVC pipes are respectively arranged along the circumference in the direction of the upper layer prestressed anchor cable mechanism 10 and the lower layer prestressed anchor cable mechanism 20 in the figure 3 to form external channels of the prestressed anchor cables (as shown in the upper layer and the lower layer prestressed anchor cable distribution schematic diagrams shown in figures 5 and 6), wherein the diameter of the arranged PVC pipes can be 60 mm-80 mm, and the PVC pipes can be bound and fixed on the reinforcement cage by iron wires nearby.

5. And embedding a sizing template 50 (the structure is shown in figure 8) in the corresponding positions of the fixed anchors at one end of the foundation top surface 101 of the upper prestressed anchor cable mechanism 10 and the lower prestressed anchor cable mechanism 20, wherein the size of the sizing template 50 is customized according to the designed size of the grouting material.

6. And erecting a foundation template and pouring a foundation. And (3) taking out the pre-buried PVC pipe in the step (4) to form a preformed hole (the surface of the PVC pipe is smooth, and the PVC pipe is convenient to take out) at the initial stage (3-7 d) of the formation of the basic strength. When the base strength reaches the design value, the template is dismantled and the sizing template 50 is removed.

7. And (4) cleaning the reserved anchor hole formed in the step (6), rechecking, then penetrating the pre-stressed anchor cable through the reserved hole, and cutting off the anchor cable after the two ends are reserved for enough length. The prestressed anchor cables penetrating into each reserved hole are steel strands with the diameter of 10.8mm, 12.9mm, 9.5mm, 12.7mm, 15.2mm, 17.8mm and 21.6mm, and the number of the penetrating prestressed anchor cables can be 2-4.

8. And (3) grouting by adopting high-strength grouting material, and anchoring the anchor cable according to the full grouting position 70 of each middle section of the anchor cable channel shown in the figure 3. Because of increased the anchor section in the anchor rope basis, the anchor rope atress is more even, and fixed effect is better.

9. And (3) installing a fan bottom tower, and pouring high-strength grouting material into the left groove after the shaping template 50 is removed to fix a fan tower bottom flange and a bottom special-shaped anchorage device 60. And (3) after the grouting hole and the groove-reserving grouting strength reach the design value (not lower than C80), tensioning the anchor cable according to the regulations, and locking the anchor cable by using an anchorage device after the design tensioning value is reached.

10. And (4) wrapping the bottom exposed anchorage device by using low-grade cement mortar to seal and protect the anchorage device.

Based on the basic structure, the external passages of the upper prestressed anchorage cable mechanism 10 and the lower prestressed anchorage cable mechanism 20 in the second embodiment shown in fig. 4 are formed by corrugated pipes. The surface of the corrugated pipe is smooth, the inner hole channel of the corrugated pipe is completely hollow except the anchor cable, the anchor cable is completely free of resistance in the hole channel, and the anchor cable is convenient to draw out and replace during later maintenance. The following embodiments and steps are specifically adopted.

1. According to different stress conditions in construction, a plurality of top surface upper-layer anchor cable holes 1011 and top surface lower-layer anchor cable holes 1012 which are mutually and correspondingly and uniformly distributed along a ring shape are arranged on the top surface 101 of the foundation from outside to inside around the circle center. While a plurality of side upper anchor cable holes 1021 corresponding to the top upper anchor cable holes 1011 are arranged along the upper circumference on the base side 102. A plurality of side lower cable holes 1022 corresponding to the top lower cable holes 1012 are circumferentially arranged on the base side 102 along the lower portion. The diameter of the circumference where the anchor cable hole 1011 on the upper layer of the top surface is located can be 4430 mm-4530 mm. The diameter of the circumference of the anchor cable holes 1012 on the top and lower layers can be 4030-4130 mm. The diameter of each of the top upper anchor cable holes 1011 and the top lower anchor cable holes 1012 is 24mm to 32 mm. The number of the top upper anchor cable holes 1011 and the top lower anchor cable holes 1012 is 60 to 80.

2. A basic reinforcement cage is erected and arranged, and four turning supports 41 are circumferentially arranged on each layer of the reinforcement cage or the cushion layer. The specific arrangement position is that four steering brackets 41 are arranged on each layer at the position of a corner part 30 formed by connecting the lower end of an upper layer vertical anchor cable part 11 vertically extending downwards from the upper layer anchor cable hole 1011 on the top surface and the upward inclined end of an upper layer parallel anchor cable part 12 extending upwards from the upper layer anchor cable hole 1021 on the side surface along the direction parallel to the upper surface 103 of the bottom plate. And four turning lugs 41 are arranged at each layer at a turning part 30 formed by connecting the lower end of the lower vertical anchor line part 21 extending vertically downward from the upper lower anchor line hole 1012 with the upwardly inclined end of the lower transition anchor line part 22. Four turning lugs 41 are then disposed in each tier at a corner 30 formed by the downwardly sloping end of the lower transition cable wire portion 22 and the inner end of the lower parallel cable wire portion 23 extending inwardly from the side lower cable wire holes 1022 in a direction parallel to the lower deck surface 104. In order to avoid the situation that the total angle is 90 degrees when the lower-layer prestressed anchor cable mechanism only performs one-time steering, the steering bearing capacity is reduced and the construction is inconvenient, the lower-layer transition anchor cable part 22 is added, two-time steering is formed, and the bearing capacity is improved. Preferably, the length of the lower transition anchor cable part 22 is 2 m.

3. And a steering ring 42 is arranged on the steering support bracket 41 of each layer, wherein a single steering ring (shown in figure 7) can be a steel ring (the diameter of the steel ring is determined according to the position of a specific anchor cable hole of the bottom plate of the fan tower barrel) with the diameter of 4450mm, 4750mm and 7575mm which is processed by Q235B and Q345B steel pipes (specification types are selected according to stress) with the diameter of phi 219 x 8-phi 230 x 10.

4. The corrugated pipes are circumferentially arranged along the direction of the upper prestressed anchor cable mechanism 10 and the lower prestressed anchor cable mechanism 20 in fig. 4 to form external channels of the prestressed anchor cables (as shown in the upper and lower prestressed anchor cable distribution diagrams shown in fig. 5 and 6), wherein the diameter of the arranged corrugated pipes can be 60 mm-80 mm, and the corrugated pipes can be bound and fixed on the reinforcement cage by iron wires nearby.

5. And embedding a sizing template 50 (the structure is shown in figure 8) at the corresponding position of the fixed anchorage at one end of the foundation top surface 101 of the upper-layer prestressed anchorage cable mechanism 10 and the lower-layer prestressed anchorage cable mechanism 20, wherein the size of the sizing template 50 is customized according to the designed size of the grouting material.

6. And erecting a foundation template and pouring a foundation. And (4) when the foundation strength reaches a design value, dismantling the template and removing the shaping template 50.

7. And (3) penetrating the prestressed anchor cable through the corrugated pipe channel, and cutting off the prestressed anchor cable after the two ends are left for a sufficient length. Wherein, the prestressed anchor cable that penetrates in each bellows passageway is one of the diameter can be 10.8mm, 12.9mm, 9.5mm, 12.7mm, 15.2mm, 17.8mm, 21.6 mm's steel strand wires, and the prestressed anchor cable quantity that penetrates can be 2~ 4.

8. And (3) installing a fan bottom tower, and pouring a high-strength grouting material into the groove after the shaping template is removed to fix the fan tower bottom flange and the bottom special-shaped anchorage device 60. And after the grouting strength reaches a design value (not lower than C80), tensioning the anchor cable according to the regulations, and locking the anchor cable by using an anchor after the designed tensioning value is reached.

10. And (4) wrapping the bottom exposed anchorage device by using low-grade cement mortar to seal and protect the anchorage device.

11. When later maintenance is needed, the anchorage devices at the two ends are dismantled, the anchorage devices can be anchored again after the anchor cables are replaced, and full pre-pressure is achieved on the fan foundation again.

The main difference between the two embodiments is that in the first embodiment, a PVC pipe is used as a reserved hole channel of the anchor cable, and in the second embodiment, a corrugated pipe is used as a penetrating channel of the anchor cable. In actual construction, different implementation steps and different maintenance times are adopted according to different pre-stage targets, the replaceable anchor cable of the corrugated pipeline is adopted, grouting anchoring is not needed in a basic pore passage, the maintenance time is short, the anchor cable can be conveniently replaced in the later stage, the maintenance is simple, and the expenditure is saved. Grouting and anchoring are carried out in the PVC pipe pore channel, the stress is uniform, and tensioning is easy to realize during construction. More suitable implementation schemes can be selected according to actual conditions so as to achieve more optimized engineering effects.

As above fan tower section of thick bamboo prestressing force anchor rope basis, through the prestressing force of realizing a tower section of thick bamboo basis, effectively avoid basic fracture, avoid the fatigue failure that fan load arouses, increased the durability and the reliability of basis. And the anchor cable can be conveniently replaced under the condition that the existing foundation structure is not damaged, so that the maintenance is facilitated, the construction amount is saved, and the economic benefit is improved.

Claims (10)

1. The fully-prestressed anchor cable foundation for the wind turbine tower comprises a foundation (100) which comprises a foundation top surface (101), a foundation side surface (102), a bottom plate upper surface (103) and a bottom plate lower surface (104), and is characterized in that a plurality of top surface upper anchor cable holes (1011) and top surface lower anchor cable holes (1012) which are mutually corresponding and uniformly distributed along a ring shape are formed in the foundation top surface (101) from outside to inside around the circle center of the foundation top surface (101), a plurality of side surface upper anchor cable holes (1021) corresponding to the top surface upper anchor cable holes (1011) are formed in the foundation side surface (102) along the upper circumference, and a plurality of side surface lower anchor cable holes (1022) corresponding to the top surface lower anchor cable holes (1012) are formed in the foundation side surface (102) along the lower circumference;

an upper prestressed anchor cable mechanism (10) is arranged between the top surface upper layer anchor cable hole (1011) and the side surface upper layer anchor cable hole (1021); a lower prestressed anchor cable mechanism (20) is arranged between the top surface lower layer anchor cable hole (1012) and the side surface lower layer anchor cable hole (1022);

the upper-layer prestressed anchor cable mechanism (10) and the lower-layer prestressed anchor cable mechanism (20) are both provided with at least one corner part (30), and a steering component (40) is arranged at the corner part (30); the steering component (40) is provided with a steering support bracket (41) and a steering ring (42), wherein the steering ring (42) is connected to the upper part of the steering support bracket (41);

the upper-layer pre-stressed anchor cable mechanism (10) and the lower-layer pre-stressed anchor cable mechanism (20) respectively comprise an external channel and at least one pre-stressed anchor cable penetrating through the internal channel.

2. The fully pre-stressed anchor cable foundation of claim 1, wherein said one upper pre-stressed anchor cable means (10) comprises an upper vertical anchor cable portion (11) extending vertically downward from said top upper anchor cable hole (1011) and an upper parallel anchor cable portion (12) extending upward from said side upper anchor cable hole (1021) in a direction parallel to said bottom plate upper surface (103);

the lower end of the upper-layer vertical anchor cable part (11) and the upward inclined end of the upper-layer parallel anchor cable part (12) are connected with each other to form the corner part (30), and the corner part (30) is provided with the steering component (40).

3. The wind turbine tower fully pre-stressed anchor cable foundation of claim 1, wherein said one lower pre-stressed anchor cable means (20) comprises a lower vertical anchor cable portion (21) extending vertically downward from said top lower anchor cable bore (1012), a lower parallel anchor cable portion (23) extending inward from said side lower anchor cable bore (1022) in a direction parallel to said bottom plate lower surface (104), and a lower transition anchor cable portion (22);

wherein the lower end of the lower layer vertical anchor cable part (21) is connected with the upward inclined end of the lower layer transition anchor cable part (22) to form the corner part (30), and the corner part (30) is provided with the steering component (40);

the downward inclined end of the lower transition anchor cable part (22) and the inner end of the lower parallel anchor cable part (23) form a corner part (30), and the corner part (30) is provided with the steering component (40).

4. The fully prestressed anchor cable foundation of wind turbine tower as claimed in claim 3, wherein said lower transition anchor cable portion (22) has a length of 2 m.

5. The fully prestressed anchor cable foundation of claim 1, 2 or 3, wherein the external passages of said upper prestressed anchor cable means (10) and said lower prestressed anchor cable means (20) are formed by corrugated pipes or PVC pipes.

6. The fully prestressed anchor cable foundation of wind turbine tower as claimed in claim 1, 2 or 3, wherein the diameter of the circumference on which the anchor cable holes (1011) on the upper top surface are located is 4430 mm-4530 mm, and the diameter of the circumference on which the anchor cable holes (1012) on the lower top surface are located is 4030-4130 mm;

the diameter of each of the top surface upper layer anchor cable hole (1011) and the top surface lower layer anchor cable hole (1012) is 24-32 mm;

the number of the top surface upper layer anchor cable holes (1011) and the top surface lower layer anchor cable holes (1012) is 60-80.

7. The fully prestressed anchor cable foundation of claim 1, 2 or 3, wherein said deflector ring (42) is a steel ring with a diameter of 4450mm, 4750mm, 7575mm and a wall thickness of 8-12 mm.

8. The fully prestressed anchor cable foundation of claim 1, 2 or 3, wherein the upper prestressed anchor cable means (10) and the lower prestressed anchor cable means (20) are respectively provided with a sizing template (50) at a position corresponding to a fixed anchor at one end of the foundation top surface (101).

9. The fully prestressed anchor cable foundation of claim 1, 2 or 3, wherein the prestressed anchor cable mechanisms (10) of the upper layer and the prestressed anchor cable mechanisms (20) of the lower layer are provided with special-shaped anchors (60) at the ends of the foundation side surfaces (102).

10. The fully prestressed anchor cable foundation of wind turbine tower as claimed in claim 1, 2 or 3, wherein the prestressed anchor cable passing through the channel of said upper prestressed anchor cable means (10) and said lower prestressed anchor cable means (20) is one of steel strand with a diameter of 10.8mm, 12.9mm, 9.5mm, 12.7mm, 15.2mm, 17.8mm and 21.6 mm;

the number of prestressed anchor cables penetrating into the channels of the upper layer prestressed anchor cable mechanism (10) and the lower layer prestressed anchor cable mechanism (20) is 2-4.

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