WO2024078329A1

WO2024078329A1 - Lifting type tower barrel foundation, prefabricated module, and wind vane tower barrel

Info

Publication number: WO2024078329A1
Application number: PCT/CN2023/121657
Authority: WO
Inventors: 杨伟; 李梦媛; 宋江毅; 张鹤鸣; 申超
Original assignee: 上海风领新能源有限公司
Priority date: 2022-10-10
Filing date: 2023-09-26
Publication date: 2024-04-18

Abstract

A lifting type tower barrel foundation, comprising a bearing platform and a plurality of pile foundations, wherein the bearing platform is in the shape of a conical cylinder, the bearing platform is arranged above a ground plane and abuts against the ground plane, the pile foundations are connected to the bottom of the bearing platform and extend to a lower portion of the ground plane, and at least some of the plurality of pile foundations are arranged at intervals in a circumferential direction of the bearing platform; and the bearing platform comprises a bottom ring beam, a top ring beam and a plurality of inclined columns, the bottom ring beam is located below the top ring beam, the plurality of inclined columns are arranged at intervals in the circumferential direction, the tops of the inclined columns are connected to the top ring beam, the bottoms of the inclined columns are connected to the bottom ring beam, and the tops of the inclined columns are located on an inner side of the bottom.

Description

Raised tower foundation, prefabricated modules and wind turbine towers

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on Chinese patent applications with application numbers 202211234869.3 and 202222664296.X, both with application dates of October 10, 2022, and claims the priority of the Chinese patent applications. The entire contents of the Chinese patent applications are hereby introduced into this application as a reference.

Technical Field

The present disclosure relates to the field of wind power foundations, and in particular to an elevated tower foundation, a prefabricated module of the elevated tower foundation, and a wind power tower.

Background technique

Wind power generation refers to the conversion of wind kinetic energy into electrical energy. Wind power energy is a clean, pollution-free, renewable energy source. Wind farms have high power generation, stable wind turbine operation, and mature manufacturing technology, and have been widely used in recent years. Wind turbine towers are tall structures that are generally high and bear large horizontal and vertical loads. The foundation is located at the bottom of the wind turbine tower and is used to bear the huge loads from the upper tower body and wind turbine. It is an important component to ensure the safety and normal operation of wind turbines. And with the development and application of ultra-high towers, higher requirements are placed on the structural strength of the tower foundation.

Summary of the invention

The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present disclosure provides an elevated tower foundation with strong structural strength, and a prefabricated module of the elevated tower foundation.

The embodiments of the present disclosure also provide a wind power tower having the above-mentioned elevated tower foundation.

The elevated tower foundation of the disclosed embodiment includes a pedestal and a plurality of pile foundations, wherein the pedestal is conical, placed above the ground plane and against the ground plane, the pile foundation is connected to the bottom of the pedestal and extends below the ground plane, and at least part of the plurality of pile foundations are arranged at intervals along the circumference of the pedestal; the pedestal includes a bottom ring beam, a top ring beam and a plurality of inclined columns, the bottom ring beam is located below the top ring beam, the plurality of inclined columns are arranged at intervals along the circumference, the top of the inclined column is connected to the top ring beam, the bottom of the inclined column is connected to the bottom ring beam, and the top of the inclined column is located on the inner side of the bottom.

The elevated tower foundation provided by the embodiment of the present disclosure includes a cap located above the ground and a pile foundation inserted into the soil. The setting of the pile foundation greatly improves the load bearing capacity of the cap. The setting of the inclined column in the cap helps to share the load transmitted downward from the tower body to the tower foundation, further improves the load bearing capacity of the tower foundation, and enhances the structural strength of the elevated tower foundation. In addition, since the cap has a certain height, the overall height of the wind power tower can be increased to a certain extent, so that the wind turbine can utilize the wind energy with stronger energy at a higher altitude, which helps to improve the power generation efficiency.

In some embodiments, the projection of the top ring beam on the ground plane in the vertical direction is located at the same level as the projection of the bottom ring beam along the vertical direction. The inner side of the projection of the vertical direction on the ground plane.

In some embodiments, the bottom ring beam includes a plurality of support portions and a plurality of connecting beams, the support portions extend in the inner and outer directions, and the plurality of support portions and the plurality of connecting beams are alternately arranged in the circumferential direction and are sequentially connected.

In some embodiments, the support portion is connected to at least two of the pile foundations that are spaced apart in the inner and outer directions.

In some embodiments, the inclined column is connected to the middle portion of the support portion, a portion of the support portion is located on the outside of the inclined column, and another portion of the support portion is located on the inside of the inclined column.

In some embodiments, the elevated tower foundation further includes a plurality of cover plates, wherein the cover plates are connected to two adjacent inclined columns, and at least one of the cover plates is provided with a door opening.

On the other hand, an embodiment of the present disclosure provides a prefabricated module for an elevated tower foundation, wherein a plurality of the prefabricated modules are sequentially spliced in the circumferential direction to form the elevated tower foundation described in any one of the above embodiments, wherein the prefabricated module comprises a bottom beam prefabricated part, a top beam prefabricated part, at least one inclined column and at least one pile foundation, wherein the top of the inclined column is connected to the top beam prefabricated part, the bottom of the inclined column is connected to the bottom beam prefabricated part, and the pile foundation is connected to the bottom end of the bottom beam prefabricated part and extends downward.

Another aspect of the present disclosure provides a wind power tower comprising: an elevated tower foundation; and a tower body, wherein the tower body is disposed on the top of the elevated tower foundation and connected to the top ring beam.

In some embodiments, the inclined column is connected to the outer side of the top ring beam, the top ring beam is provided with a prestressed channel for anchoring prestressed tendons, and/or the top ring beam is provided with an anchor bolt hole for anchoring the tower body.

In some embodiments, the wind turbine tower further includes prestressed tendons, which prestressed tendons prestress the tower body and whose bottom ends are anchored to the top ring beam.

In some embodiments, the prestressed tendons are internal prestressed tendons or external prestressed tendons.

Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present disclosure will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

FIG. 1 is a top view of an elevated tower foundation provided in an embodiment of the present disclosure.

FIG. 2 is a cross-sectional view of an elevated tower foundation provided in an embodiment of the present disclosure.

FIG. 3 is a top view of the elevated tower foundation provided in an embodiment of the present disclosure.

FIG. 4 is a cross-sectional view of an elevated tower foundation provided in an embodiment of the present disclosure.

FIG. 5 is a top view of the elevated tower foundation provided in an embodiment of the present disclosure.

FIG6 is a cross-sectional view of an elevated tower foundation provided in an embodiment of the present disclosure.

Reference numerals: wind turbine tower 100, elevated tower foundation 1, cap 11, bottom ring beam 111, support portion 1111, Connecting beam 1112, top ring beam 112, inclined column 113, pile foundation 12, cover plate 13, door opening 131, tower body 2, ground plane 3, prestressed tendons 4, anchor bolts 5, connecting plate 51

Detailed ways

Embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, but should not be understood as limiting the present disclosure.

The wind turbine tower 100 and the elevated tower foundation 1 provided in the embodiment of the present disclosure are described below with reference to FIGS. 1 to 6. The wind turbine tower 100 includes an elevated tower foundation 1 and a tower body 2. The tower body 2 is arranged on the top of the elevated tower foundation 1 and connected to the top of the elevated tower foundation 1. The elevated tower foundation 1 serves as the foundation of the wind turbine tower and supports the tower body 2.

The elevated tower foundation 1 includes a cap 11 and a plurality of pile foundations 12. The cap 11 is in the shape of a cone, and the cap 11 is placed above the ground plane 3 and against the ground plane 3, and the central axis of the cap 11 is perpendicular to the ground plane 3. The top of the pile foundation 12 is connected to the bottom of the cap 11 and extends below the ground plane 3, and at least part of the plurality of pile foundations 12 is arranged at intervals along the circumference of the cap 11. In other words, the pile foundation 12 is connected to the cap 11 and inserted into the soil, which can greatly improve the load bearing capacity of the cap 11 and improve the structural strength of the elevated tower foundation 1. In some embodiments, all the pile foundations 12 are arranged at intervals in the circumference of the cap 11, and in other embodiments, part of the pile foundations 12 are arranged at intervals in the circumference of the cap 11, and part of the pile foundations 12 can be arranged at intervals in the inner and outer directions (directions away from and close to the central axis of the cap 11).

Specifically, the pedestal 11 includes a bottom ring beam 111, a top ring beam 112, and a plurality of inclined columns 113, wherein the bottom ring beam 111 is located below the top ring beam 112. The plurality of inclined columns 113 are arranged at intervals along the circumference of the pedestal 11, and there is a certain angle between the extension direction of the inclined columns 113 and the central axis of the pedestal 11. The top of the inclined column 113 is connected to the top ring beam 112, the bottom of the inclined column 113 is connected to the bottom ring beam 111, and the top of the inclined column 113 is located on the inner side of the bottom thereof. In other words, the top of the inclined column 113 is closer to the central axis of the pedestal 11 than the bottom. The inclined column 113 is a structure that extends downward and outward as a whole.

In some embodiments, as shown in Figures 1, 3 and 5, the central axis of the top ring beam 112 coincides with that of the bottom ring beam 111, and both extend in the vertical direction. The projection of the top ring beam 112 on the ground plane 3 along the vertical direction is located inside the projection of the bottom ring beam 111 on the ground plane 3 along the vertical direction, that is, the size of the top ring beam 112 is smaller than that of the bottom ring beam 111.

Specifically, as shown in FIGS. 1, 3 and 5, the outer edge of the projection of the top ring beam 112 on the ground plane 3 along the vertical direction is located inside the outer edge of the projection of the bottom ring beam 111 on the ground plane 3 along the vertical direction, that is, the maximum size of the former is smaller than that of the top ring beam 112. Furthermore, the outer edge of the projection of the top ring beam 112 on the ground plane 3 along the vertical direction is located inside the inner edge of the projection of the bottom ring beam 111 on the ground plane 3 along the vertical direction, that is, the maximum size of the former is smaller than the maximum size of the latter.

Further, as shown in Fig. 1, Fig. 3 and Fig. 5, the bottom ring beam 111 includes a plurality of support portions 1111 and a plurality of connecting beams 1112. The support portions 1111 extend in the inner and outer directions. The plurality of support portions 1111 and the plurality of connecting beams 1112 are alternately arranged in the circumferential direction of the bottom ring beam 111 and are sequentially connected. The connecting beam 1112 serves to connect two adjacent support portions 1111. Since the support portions 1111 extend in the inner and outer directions, the inner ends thereof are close to the central axis of the bottom ring beam 111, and the outer ends thereof are far from the central axis of the bottom ring beam 111. One end of the connecting beam 1112 is connected to the side of one of the support portions 1111, and the other end is connected to the side of the other support portion 1111. The support portions 1111 mainly serve to support.

The bottom end surface of the bottom ring beam 111 abuts against the ground plane 3. In some embodiments, as shown in Figures 2, 4 and 6, the bottom end surface of the support portion 1111 is flush with the bottom end surface of the connecting beam 1112, and both abut against the ground plane 3. The provision of the support portion 1111 increases the contact area between the bottom ring beam 111 and the ground plane 3, and improves the load supporting capacity of the elevated tower foundation 1 in the radial direction.

Furthermore, the support portion 1111 also has the function of connecting the pile foundation 12, that is, the top of the pile foundation 12 is connected to the bottom end surface of the support portion 1111. In order to further improve the structural strength and rigidity of the elevated tower foundation 1, a portion of the pile foundation 12 is arranged at intervals in the inner and outer directions, that is, the pile foundation 12 can be arranged in multiple layers in the inner and outer directions, thereby enhancing the radial load support capacity of the elevated tower foundation 1. The support portion 1111 is connected to at least two pile foundations 12 arranged at intervals in the inner and outer directions.

In the embodiments shown in Fig. 2, Fig. 4 and Fig. 6, each support portion 1111 is connected to two pile foundations 12 arranged at intervals in the inner and outer directions, that is, in these embodiments, the pile foundations 12 are divided into two groups, each group of pile foundations 12 includes a plurality of pile foundations 12 having the same number as the support portion 1111, the plurality of pile foundations 12 in each group of pile foundations 12 are arranged at intervals in the circumferential direction, and the two groups of pile foundations 12 are arranged at intervals in the inner and outer directions. Of course, in other embodiments, the support portion 1111 can also be connected to three or more pile foundations 12 arranged at intervals in the inner and outer directions. Moreover, different support portions 1111 can also be connected to different numbers of pile foundations 12, for example, the support portion 1111 can be connected to two pile foundations 12, or it can be connected to three pile foundations 12.

In some embodiments, the inclined column 113 is connected to the middle of the support portion 1111, a portion of the support portion 1111 is located outside the inclined column 113, and another portion of the support portion 1111 is located inside the inclined column 113. As shown in Figures 2, 4 and 6, the bottom of the inclined column 113 is connected to the middle of the top end surface of the support portion 1111, so that the structure of the elevated tower foundation 1 can be more stable. When the load is transmitted downward through the inclined column 113, the support portion 1111 can play a stronger supporting role, thereby improving the structural strength and rigidity of the tower foundation.

Further, as shown in FIG. 2 , the size of the position where the bottom of the inclined column 113 is connected (to the support portion 1111 ) is larger than other positions, thereby making the connection between the inclined column 113 and the support portion 1111 more stable.

In some embodiments, the angle between the inclined column 113 and the ground plane 3 is 50°-70°.

In some embodiments, as shown in FIG. 2 , FIG. 4 and FIG. 6 , the angle between the inclined column 113 and the ground plane 3 is 60°.

In some embodiments, as shown in FIG. 1 , FIG. 3 and FIG. 5 , since the inclined columns 113 are arranged at intervals, in order to prevent debris from entering the elevated tower foundation 1 above the ground plane 3, the elevated tower foundation 1 also includes a plurality of cover plates 13, and the cover plates 13 are connected to two adjacent inclined columns 113, and at least one cover plate 13 is provided with a door opening 131. In other words, the cover plate 13 covers the gap between two adjacent inclined columns 113, thereby isolating the space defined inside the base 11 from the outside world. For the convenience of maintenance, the cover plate 13 is provided with a door opening 131 for workers and equipment to enter and exit, and the door opening 131 is arranged near the bottom of the cover plate 13. It can be understood that in order to adapt to the structure of the inclined columns 113, the cover plate 13 is arranged at an angle.

The top ring beam 112 is connected to the bottom of the tower body 2. As shown in Figures 1 to 6, the inclined columns 113 are connected to the outer side of the top ring beam 112, so that the top ring beam 112 protrudes inward relative to the inclined columns 113.

In some embodiments, the wind turbine tower 100 further includes prestressed tendons 4 , which are used to perform prestressing tensioning on the tower body 2 , and the top ring beam 112 also has the function of anchoring the prestressed tendons 4 of the wind turbine tower 100 .

As an example, in the embodiment shown in Figures 1 to 4, the top ring beam 112 is provided with a prestressed hole for anchoring the prestressed tendons 4, and the prestressed tendons 4 pass downward through the prestressed hole on the top ring beam 112 and are anchored at the bottom end of the top ring beam 112. In addition, there are multiple prestressed holes, and the multiple prestressed holes are spaced apart in the circumferential direction of the top ring beam 112.

Specifically, in the embodiments shown in FIG. 1 and FIG. 2 , the prestressed tendons 4 are external prestressed tendons, that is, the tower body 2 is subjected to external prestressing tensioning by using the prestressed tendons 23, and the prestressed tendons 4 are located on the inner side of the tower body 2. In the embodiments shown in FIG. 3 and FIG. 4 , the prestressed tendons 4 are internal prestressed tendons, that is, the tower body 2 can be subjected to internal prestressing tensioning by using the prestressed tendons 4, and the prestressed tendons 4 are arranged in the wall of the tower body 2.

In the embodiment shown in FIG5 and FIG6, the top ring beam 112 is provided with anchor holes for anchoring the tower body 2, and the bottom end of the tower body 2 is provided with a connecting plate 51. The anchor bolts 5 pass through the connecting plate 51 and the anchor holes of the top ring beam 112 in sequence and are anchored, so as to connect the tower body 2 with the top ring beam 112. In the embodiment shown in FIG5 and FIG6, the connecting plate 51 is a T-shaped plate, and the anchor holes are arranged in two rows, one row of anchor holes is located on the inner side of the tower body 2 in the inner and outer directions, and the other row of anchor holes is located on the outer side of the tower body 2 in the inner and outer directions. The tower body 2 and the top ring beam 112 are anchored by the two rows of inner and outer anchor bolts 5, which improves the reliability of the connection relationship and enhances the structural strength and rigidity of the wind power tower 100.

Of course, in some embodiments, the top ring beam 112 may be provided with both prestressed channels and anchor holes.

The disclosed embodiment also proposes a prefabricated module of an elevated tower foundation 1. A plurality of prefabricated modules are sequentially spliced in the circumferential direction to form the elevated tower foundation 1 described in any of the above embodiments. The prefabricated module includes a bottom beam prefabricated part, a top beam prefabricated part, at least one inclined column 113 and at least one pile foundation 12. The top of the inclined column 113 is connected to the top beam prefabricated part, the bottom of the inclined column 113 is connected to the bottom beam prefabricated part, and the pile foundation 12 is connected to the bottom end of the bottom beam prefabricated part and extends downward. In other words, a plurality of prefabricated modules are first prepared, and the prefabricated modules are transported to the site for splicing to complete the installation of the elevated tower foundation 1, and the transportation cost and preparation difficulty are greatly reduced.

The bottom beam prefabricated parts of the prefabricated module are connected end to end to form a bottom ring beam 111, and the top beam prefabricated parts of the prefabricated module are connected end to end to form a top ring beam 112. The number of prefabricated modules used to form the elevated tower foundation 1 can be set according to site needs, and the present disclosure does not limit this.

In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

In the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

In the present disclosure, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

In the present disclosure, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present disclosure. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present disclosure.

Claims

An elevated tower foundation comprises a cap and a plurality of pile foundations, wherein the cap is in a conical cylinder shape, the cap is placed above the ground plane and against the ground plane, the pile foundation is connected to the bottom of the cap and extends below the ground plane, and at least part of the plurality of pile foundations are arranged at intervals along the circumference of the cap;

The pedestal includes a bottom ring beam, a top ring beam and a plurality of inclined columns, the bottom ring beam is located below the top ring beam, the plurality of inclined columns are arranged at intervals along the circumference, the top of the inclined column is connected to the top ring beam, the bottom of the inclined column is connected to the bottom ring beam, and the top of the inclined column is located on the inner side of the bottom.
The elevated tower foundation according to claim 1, wherein a projection of the top ring beam on the ground plane along the vertical direction is located inside a projection of the bottom ring beam on the ground plane along the vertical direction.
According to the elevated tower foundation according to claim 1 or 2, the bottom ring beam includes a plurality of support portions and a plurality of connecting beams, the support portions extend in the inward and outward directions, and the plurality of support portions and the plurality of connecting beams are alternately arranged in the circumferential direction and connected in sequence.
The elevated tower foundation according to claim 3, wherein the support portion is connected to at least two of the pile foundations spaced apart in the inner and outer directions.
According to the elevated tower foundation of claim 3, the inclined column is connected to the middle part of the support part, a part of the support part is located on the outside of the inclined column, and another part of the support part is located on the inside of the inclined column.
The elevated tower foundation according to any one of claims 1 to 5 further comprises a plurality of cover plates, wherein the cover plates are connected to two adjacent inclined columns, and at least one of the cover plates is provided with a door opening.
A prefabricated module for an elevated tower foundation, wherein a plurality of the prefabricated modules are sequentially spliced in the circumferential direction to form an elevated tower foundation according to any one of claims 1 to 6, the prefabricated module comprising a bottom beam prefabricated part, a top beam prefabricated part, at least one inclined column and at least one pile foundation, the top of the inclined column is connected to the top beam prefabricated part, the bottom of the inclined column is connected to the bottom beam prefabricated part, and the pile foundation is connected to the bottom end of the bottom beam prefabricated part and extends downward.
A wind power tower comprises: an elevated tower foundation, wherein the elevated tower foundation is the elevated tower foundation according to any one of claims 1 to 6; and a tower body, wherein the tower body is arranged on the top of the elevated tower foundation and connected to the top ring beam.
The wind turbine tower according to claim 8, wherein the inclined column is connected to the outer side of the top ring beam, the top ring beam is provided with a prestressed channel for anchoring prestressed tendons, and/or the top ring beam is provided with an anchor bolt hole for anchoring the tower body.
The wind turbine tower according to claim 8 or 9 further comprises prestressed tendons, which prestressed tendons prestress the tower body and whose bottom ends are anchored to the top ring beam.