CN102720207A - Tower foundation and tower of wind-driven generator - Google Patents

Abstract

The invention discloses a tower foundation and a tower of a wind power generator, relates to the technical field of tower structures, and is designed to make the buried depth of the tower foundation shallow so as to raise the height of the tower relative to the ground. The tower foundation includes a foundation base plate buried under the ground surface, wherein a hollow support pier is connected to the top of the base base plate, and the hollow support pier is located on the ground surface. The tower of the wind power generator includes the above-mentioned tower foundation, and a tower body is arranged on the top of the tower foundation. The present invention is mainly used in wind power generators as the basis for supporting the wind power generator tower.

Description

A kind of tower foundation and the tower of wind power generator

technical field

The invention relates to a tower structure, in particular to a tower foundation and a wind power generator tower.

Background technique

The tower foundation can be applied in many different occasions to provide support, for example, it can be applied in the derrick for drilling, or it can also be applied in the tower of the wind power generator.

At present, a tower supporting a wind power generator generally includes a tower foundation and a tower body supported on the tower foundation. Wherein, a wind generator is arranged on the top of the tower body, and the wind generator includes an impeller, a shroud, a generator, and a nacelle. Among them, the tower body mostly adopts a tapered cylindrical structure, and the tower foundation supporting the tower body adopts a circular or polygonal cast-in-situ concrete foundation.

As shown in FIG. 1 , it is a tower foundation in the prior art. The tower foundation includes a foundation base plate 1 and a supporting round platform 101 located on the base base plate 1. The supporting round platform 101 is docked with the flange at the lower end of the tower body to support the tower body. As shown in Fig. 2, it is another tower foundation in the prior art. The tower foundation includes a base plate 1 , a support column 102 is provided in the middle of the base plate 1 , and a support beam 103 is provided around the support column 102 .

At present, as wind power generators become larger and larger, wind power generators need to be at a sufficient height to obtain more wind energy. Therefore, it is necessary to increase the height of the tower supporting the wind power generators. At the same time, the diameter of the impeller in this large-scale wind generator is larger than the diameter of the impeller in the ordinary wind generator, which increases the force of the wind on the impeller, so the diameter of the cylinder of the tower body also needs to be increased. In addition, due to the large power of large wind turbines, the load transmitted to the tower foundation also increases, so the pressure acting on the tower foundation increases, which increases the pressure on the foundation floor and the force on the ground , leading to an increase in the buried depth of the tower foundation, so that the height of the tower foundation relative to the ground will also decrease with the increase in the buried depth.

Contents of the invention

The purpose of the present invention is to provide a tower foundation and a tower assembly of a wind power generator, which can make the buried depth of the tower foundation shallower so that the height of the tower foundation relative to the ground can be raised

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

A tower foundation includes a foundation bottom plate buried under the ground surface, a hollow support pier is connected to the top of the foundation bottom plate, and the hollow support pier is located on the ground surface.

Wherein, the base base plate is composed of two or more prefabricated base plate components interlocking and assembling in the circumferential direction, or integrally formed by cast-in-place concrete.

Further, the lower part of one side of the prefabricated floor member is provided with a first boss protruding in the circumferential direction, and the upper part of the other opposite side is provided with a second boss protruding in the circumferential direction; the first boss The upper surface of the platform is provided with a connecting piece, and the lower surface of the second boss is provided with a through hole for accommodating the connecting piece.

Wherein, the hollow support pier is composed of two or more prefabricated support members arranged at intervals in the upper direction of the foundation floor; a coaming plate is arranged between the two adjacent prefabricated support members.

Further, grooves are provided on the top surface of the prefabricated floor member, and first steps that match the grooves are provided on both sides of the bottom of the prefabricated support member along the circumferential direction.

Further, the top end of the hollow support pier is provided with a prefabricated ring beam.

Wherein, the bottom of the prefabricated ring beam is provided with an annular groove, and the top of the prefabricated supporting member is provided with a second step matched with the annular groove on both sides of the circumference.

Further, the foundation base plate is a hollow structure.

A tower of a wind power generator comprises the tower foundation described in the above technical solutions, and a tower body is arranged on the top of the tower foundation.

Wherein, the inner space of the hollow supporting pier of the tower foundation is provided with auxiliary power equipment electrically connected to the wind power generator arranged at the top of the tower body.

The tower foundation and the tower of the wind power generator provided by the embodiment of the present invention include a foundation base plate buried under the ground surface, the top of the base base plate is connected with a hollow support pier on the ground surface, and the beneficial effects brought are: : Compared with the solid support pier under the same application conditions, the diameter of the hollow support pier increases, and the corresponding load-bearing area increases, so the pressure on the hollow support pier decreases. At the same time, in order to meet the bending strength of the tower foundation Requirements, the diameter of the base plate also increases, so the load-bearing area of the base plate also increases, which reduces the final pressure on the base plate and reduces the force on the ground, thus making the burial depth of the entire tower foundation shallower , thereby raising the height of the tower foundation relative to the ground. The present invention is mainly used in wind power generators as the foundation for supporting the wind power generator tower.

Description of drawings

Fig. 1 is a structural schematic diagram of a tower foundation in the prior art;

Fig. 2 is the structural representation of another kind of tower foundation in the prior art;

Fig. 3 is a three-dimensional structural schematic diagram of a tower foundation according to an embodiment of the present invention;

Fig. 4 is a top view of the prefabricated floor member in the tower foundation shown in Fig. 3;

Fig. 5 is a front view of the prefabricated floor member shown in Fig. 4;

Fig. 6 is a schematic diagram of the assembly of the prefabricated floor member shown in Fig. 5;

Fig. 7 is a schematic diagram of the connection between the prefabricated support member and the prefabricated bottom plate in the tower foundation of the embodiment of the present invention;

Fig. 8 is a top view of the prefabricated support member in the tower foundation of the embodiment of the present invention;

Fig. 9 is a schematic diagram of the three-dimensional structure of the prefabricated support member shown in Fig. 8;

Fig. 10 is a schematic diagram of the connection between the prefabricated ring beam and the prefabricated support member in the tower foundation of the embodiment of the present invention;

Fig. 11 is a top view of the prefabricated ring beam in the tower foundation of the embodiment of the present invention;

Fig. 12 is a sectional view of line A-A in Fig. 11;

Fig. 13 is a schematic diagram of a tower of a wind power generator according to an embodiment of the present invention.

Reference signs:

1-foundation floor, 10-prefabricated floor member, 101-supporting round platform, 102-supporting column, 103-supporting beam, 11-first boss, 12-second boss, 13-groove (cup mouth), 14 -Incline, 15, 210, 220-through hole, 16-connector, 2-hollow support pier, 20-prefabricated support member, 21-first step, 22-second step, 3-shroud, 4-prefabricated ring Beam, 40-connector, 41-reserved hole, 42-ring groove, 5-tower body

Detailed ways

The tower foundation and the tower of the wind power generator provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in Fig. 3, it is a specific embodiment of the tower foundation of the present invention. In this embodiment, the tower foundation includes a foundation base plate 1 buried under the ground surface, a hollow support pier 2 is connected to the top of the base base plate 1, and the hollow support pier 2 is located on the ground surface.

The tower foundation provided by the embodiment of the present invention includes a foundation base plate 1 buried under the ground surface, the top of the base base plate 1 is connected with a hollow support pier 2 on the ground surface, and the hollow support pier 2 is the same as the solid pier under the same application Compared with the supporting pier, the diameter of the hollow supporting pier 2 increases, and the corresponding load-bearing area increases, so the pressure on the hollow supporting pier 2 decreases. The diameter of the bottom plate 1 also increases, and the load-carrying area of the foundation bottom plate 1 increases, so that the final pressure on the foundation bottom plate 1 is reduced, and the force on the ground is also reduced, so that the buried depth of the entire tower foundation becomes shallower, thereby lifting Higher the height of the tower foundation relative to the ground.

As shown in Fig. 4 to Fig. 6, the foundation floor 1 in the embodiment of the present invention may be composed of more than two prefabricated floor members 10 which are interlocked and assembled in the circumferential direction. The prefabricated base plate member 10 can be transported to the site and assembled into the base base plate 1 after processing in the factory, which not only saves the concrete curing period and inspection time, but also shortens the engineering period. In addition, the base plate 1 in the embodiment of the present invention can also be integrally formed by cast-in-place concrete. At present, the cast-in-place concrete technology has a very mature process, and the base plate 1 produced has good seismic performance, good integrity, and good plasticity. Features.

For example, in this embodiment, in order to make two or more prefabricated floor components 10 interlock and assemble in the circumferential direction to form the basic floor 1, a first protrusion protruding in the circumferential direction may be provided at the lower part of one side of the prefabricated floor components 10. The upper part of platform 11, another opposite side is provided with the second boss 12 that protrudes along the circumferential direction; The upper surface of described first boss 11 is provided with connector 16, and the lower surface of described second boss 12 is provided with There is a through-hole 15 for receiving the connecting piece. Specifically, as shown in FIG. 6 , the assembly of the prefabricated floor components 10 can be achieved by sequentially inserting the connector 16 of one of the prefabricated floor components 10 into the through hole 15 of the next adjacent prefabricated floor component 10 . Wherein, the connector 16 on the upper surface of the first boss 11 in this embodiment can be a pre-embedded prestressed steel bar or a steel strand, and the prestressed steel bar or steel strand stretches out of the through hole 15 in the second boss 12 and then Sufficient length is reserved to ensure the required stretching length in the subsequent stretching process. Generally speaking, the number of through holes 15 is not less than two. Two adjacent prefabricated bottom plate components 10 are connected to each other through the first boss 11 and the second boss 12 adjacent to each other, and are connected and stretched by prestressed steel bars or steel strands to form an integral basic bottom plate 1, And the diameter of the foundation base plate 1 can be greater than 5 meters.

The shape of the base base plate 1 can be circular, circular, polygonal or polygonal. Different appearances of the foundation base plate 1 can be selected according to different requirements.

Referring again to Fig. 3, it can be seen that in this embodiment, the hollow support pier 2 may be composed of more than two prefabricated support members 20 arranged at intervals in the upper direction of the foundation floor 1, and two adjacent prefabricated support members 20 A shroud 3 is provided between the components 20 . The prefabricated support member 20 is transported to the construction site after processing in the factory, and then assembled into a hollow support pier 2, which not only saves the concrete curing period and inspection time, but also shortens the engineering period. In addition, the prefabricated support member 20 may have a cross-sectional area greater than 0.05 square meters and a length greater than 5 meters. The cross-sectional shape of the prefabricated support member 20 can be a regular polygon, an irregular polygon or a circle, so prefabricated support members with different structures can be selected according to different occasions.

Wherein, the space inside the hollow support pier 2 can place different equipment according to different occasions, and the inner space can be closed by the coaming plate 3, so that the equipment can not be affected by the outside world. The hoarding 3 provided by the embodiment of the present invention is made of prefabricated concrete panels or steel plates connected between adjacent prefabricated support members 20, or is formed by winding carbon cloth along the outside of the hollow support pier 2, or is installed by other composite materials. Between two adjacent prefabricated support members 20, these connection methods can shorten the construction period. The hoarding 3 provided by the embodiment of the present invention can also be integrally formed by cast-in-place concrete, which has the characteristics of good seismic performance, good integrity, and good plasticity.

Referring again to FIG. 4, it can be known that the top surface of the prefabricated floor member 10 provided by the embodiment of the present invention is provided with a groove 13. Referring to FIGS. A first step 21 matching the groove 13 is provided on the side. Wherein, the top surface of the prefabricated floor member 10 is a slope 14 that gradually decreases upwards, so that the top surface of the prefabricated floor member 10 forms a cup-shaped structure, and the groove 14 forms the mouth of the cup, and the prefabricated support member The bottom of 20 is put into the groove (cup mouth) 13 of prefabricated floor member 10. The first steps 21 on both sides of the prefabricated support member 20 are provided with more than two reserved through holes 210, and correspondingly at the bottom of the groove (cup mouth) 13 of the prefabricated floor member 10, more than two connectors ( not shown), wherein the connectors may be pre-embedded steel bars, steel strands or anchor bolts. After the steel bars and steel strands protrude from the reserved holes, sufficient length is reserved to ensure the tension of the steel bars or steel strands, thereby improving the connection strength between the prefabricated support member 20 and the prefabricated floor member 10 . In addition, the shape of the groove (cup mouth) 13 can be a regular polygon, an irregular polygon or a circle.

It should be noted that the top surface of the prefabricated floor member 10 is not limited to be provided with grooves (cup openings). In other embodiments of the present invention, the top surface of the prefabricated floor member 10 is a slope 14 that gradually decreases upwards, but no groove (cup) 13 is provided on the top surface. At this time, the prefabricated floor member 10 The top surface is flat. The connection between the prefabricated support member 20 and this type of prefabricated floor member 10 is similar to that described above, which can be known by reference.

As shown in Figures 10 to 12, the top of the hollow support pier 2 is provided with a prefabricated ring beam 4, and the prefabricated ring beam 4 is used for fixed connection with the flange at the bottom of the tower body, so that the entire tower foundation can be fixed. The role of supporting the tower body. The flange at the bottom end of the tower body is provided with a connecting piece connected with the prefabricated ring beam 4 , and correspondingly, the prefabricated ring beam 4 is provided with a reserved hole 41 for accommodating the connecting piece. The prefabricated ring beam 4 can be polygonal or circular. The material of the prefabricated ring beam 4 can be selected from reinforced concrete or steel. The diameter of the prefabricated ring beam 4 can be designed according to the diameter of the tower bottom, for example, the outer diameter of the prefabricated ring beam 4 can be greater than 4 meters, and the height can be greater than 0.1 meter.

Referring again to Fig. 12, it can be seen that the bottom of the prefabricated ring beam 4 provided by the embodiment of the present invention is provided with an annular groove 42, and referring again to Figs. A second step 22 matching the annular groove 42 is provided on the side. The annular groove 42 enables the top of the prefabricated support member 20 to be accurately and quickly positioned and installed on the bottom of the prefabricated ring beam 4 . The second step 22 is provided with a reserved through hole 220 for accommodating the connector, and correspondingly, the bottom of the annular groove 42 is provided with more than two connectors 40 connected to the prefabricated support member 20, wherein the connectors 40 can be pre-embedded The steel bars, steel strands or anchor bolts, the connecting piece passes through the reserved through hole 220 of the second step 22, and then the prefabricated support member 20 is connected with the prefabricated ring beam 4 as a whole by tensioning, thereby improving the prefabricated ring beam 4. The connection strength with the prefabricated floor member 10.

As a further improvement to the embodiment of the present invention, the foundation base plate 1 can be a hollow structure. Compared with the solid base base plate structure, the diameter and area of the hollow base base plate 1 are increased, and the corresponding pressure is further reduced. Smaller, so that the hollow base plate 1 is buried more shallowly, thereby further raising the height of the tower foundation relative to the ground.

As shown in FIG. 13 , the embodiment of the present invention also provides a wind power generator tower, including the tower foundation described in the above technical solution, and a tower body 5 is arranged at the top of the tower foundation. Wherein, the tower frame 5 of the wind power generator is connected with the prefabricated ring beam 4 at the top of the tower foundation through the flange at the bottom thereof, thereby playing the role of supporting the tower frame 5 . Since this embodiment only embeds the base plate 1 under the ground surface, it not only reduces the amount of earthwork excavation and concrete consumption, but also can keep the height of the original tower body 5 unchanged compared with the solid tower foundation. Under normal circumstances, the total height of the tower body 5 can be raised by more than 10 meters, so that the wind generator can obtain more wind energy, thus avoiding the inconvenience of transportation caused by directly increasing the size of the tower body 5 . Since all prefabricated components can be processed in the factory in advance, and then transported to the construction site for assembly, it not only saves the concrete curing period and inspection time, but also shortens the construction period by more than one month; at the same time, the size and weight of all prefabricated components are small, Conventional transport vehicles can complete the transport.

In addition, the inner space of the hollow supporting pier of the tower foundation is provided with auxiliary power equipment electrically connected to the wind power generator arranged at the top of the tower body. Since the interior of the hollow support pier 2 has a large enough space, various auxiliary electrical equipment can be installed, so that the internal space of the hollow support pier 2 can be fully utilized.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. a tower foundation comprises the sole plate that is embedded under the face of land, it is characterized in that, the top of said sole plate is connected with the hollow support pier, and said hollow support pier is positioned on the face of land.

2. tower foundation according to claim 1 is characterized in that, said sole plate is assemblied to form by the circumferentially mutual interlock of plural prefabricated panel member; Or

Said sole plate is one-body molded by cast-in-situ concrete.

3. tower foundation according to claim 2 is characterized in that, the bottom of a side of said prefabricated panel member is provided with along the top of first boss that circumferentially protrudes, another opposite side and is provided with along second boss of circumferential protrusion;

The upper surface of said first boss is provided with connector, and the soffit of said second boss is provided with the through hole that holds said connector.

4. tower foundation according to claim 3 is characterized in that, said hollow support pier circumferentially is intervally arranged on said sole plate by prefabricated supporting member more than two and forms; Be provided with coaming plate between adjacent two said prefabricated supporting members.

5. tower foundation according to claim 4 is characterized in that the end face of said prefabricated panel member is provided with groove, and the bottom of said prefabricated supporting member is provided with the first step that matches with said groove along circumferential both sides.

6. tower foundation according to claim 5 is characterized in that the top of said hollow support pier is provided with prefabricated ring beam.

7. tower foundation according to claim 6 is characterized in that the bottom of said prefabricated ring beam is provided with annular groove, and the top of said prefabricated supporting member is provided with the second step that matches with said annular groove along circumferential both sides.

8. according to the described tower foundation of claim 1-7, it is characterized in that said sole plate is a hollow-core construction.

9. the pylon of a wind-driven generator is characterized in that, comprises each described tower foundation of claim 1-8, is provided with the pylon body on the top of said tower foundation.

10. the pylon of wind-driven generator according to claim 9 is characterized in that, the inner space of the hollow support pier of said tower foundation is provided with the auxiliary power equipment that is electrically connected with the wind-driven generator that is located at said pylon body top.

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