CN210265030U

CN210265030U - Assembled wind driven generator foundation

Info

Publication number: CN210265030U
Application number: CN201920867861.8U
Authority: CN
Inventors: 黄冬平; 彭文兵
Original assignee: Architecture Design and Research Institute of Tongji University Group Co Ltd
Current assignee: Architecture Design and Research Institute of Tongji University Group Co Ltd
Priority date: 2019-06-11
Filing date: 2019-06-11
Publication date: 2020-04-07
Anticipated expiration: 2029-06-11

Abstract

The utility model relates to an assembly type wind driven generator foundation, which comprises a prestressed anchor bolt group, wherein the prestressed anchor bolt group is annular and is used for receiving a wind driven generator; the precast beams are circumferentially arranged along the prestressed anchor bolt group; and the prestressed steel strands are connected with the two opposite precast beams. Through the technical scheme provided by the application, the wind generating sets with different sizes can be well coped with, the standardized production of the precast beam is realized, the assembly of all components on a construction site is only needed to be completed, the installation process is simple, the construction cost is low, the construction progress can be effectively guaranteed especially in places with inconvenient transportation and construction, and the wind generating sets can play a good role in large-scale arrangement.

Description

Assembled wind driven generator foundation

Technical Field

The utility model relates to a aerogenerator infrastructure field especially relates to an assembled aerogenerator basis.

Background

The wind generating set converts wind energy into electric energy and provides a clean and renewable energy source, compared with the traditional thermal generating set, the wind generating set has the advantages that the energy consumption in the process of wind power generation is less, the environment is not polluted, and meanwhile, the sustainable development of the energy source can be realized, so that the wind generating set is more and more approved by governments and enterprises; on the other hand, the air quality requirement of each city in China is continuously increased at present, and the utilization of energy sources such as coal and the like is effectively controlled, so that the market demand of wind power generation is explosively increased; in addition, the wind generating set can be arranged in areas with rare smoke, such as vast plains and mountainous regions, and in areas such as the southwest and the northwest of China, the land margin is wide, but the geological conditions are severe, and the places suitable for people to live and economic development are few, so that the wind generating set arranged in the areas has good economic benefits.

At present, the large-scale wind generating set is a development trend, generally, the foundation of the wind generating set is a large-diameter independent foundation, and the large-scale wind generating set requires the foundation with larger diameter to bear upper load, so that the construction complexity and the process period are increased; on the other hand, the wind generating set needs to be arranged on a remote mountain area or plain due to the characteristics of the wind generating set, so that equipment transportation is inconvenient, foundation construction is difficult, and the construction cost is high.

Therefore, it is necessary to design a set of prefabricated wind power generation foundation, adopt standardized assembly process, through the factory prefabrication, the on-the-spot assembly combines the novel fan foundation that a small amount of concrete pouring formed, can solve the remote mountain area material and the equipment transportation inconvenience, the concrete pouring is discontinuous and the uncontrollable problem of quality, can reduce on-the-spot formwork work load simultaneously, effectively reduce the construction degree of difficulty, shorten construction period, reduce basic cost to can satisfy the requirement of national building industrialization development.

SUMMERY OF THE UTILITY MODEL

Based on the problems that the existing wind driven generator foundation structure is complex, materials and equipment are inconvenient to transport, the construction period is long and the construction cost is high, and the assembled wind driven generator foundation is provided.

An assembled wind driven generator foundation comprises a pre-stressed anchor bolt group, wherein the pre-stressed anchor bolt group is annular and is used for bearing a wind driven generator; the precast beams are arranged along the circumferential direction of the prestressed anchor bolt group; and the prestressed steel strand is connected with the two opposite precast beams.

Further, the two opposite precast beams are positioned on the same diameter line of the prestressed anchor bolt group.

Further, the cross section of the precast beam is in an inverted T shape.

Further, the two sides of the bottom of the precast beam comprise symmetrical haunched beams.

Further, the system also comprises a cast-in-place pier, wherein the cast-in-place pier and the prestressed anchor bolt group are combined into a whole and are connected with the precast beams.

Furthermore, the precast beam and the cast-in-situ pier respectively comprise a strand hole, and the prestressed steel strand penetrates through the strand hole to connect the two opposite precast beams.

Furthermore, the strand hole is arranged at the top and the bottom of the precast beam and the cast-in-situ pier.

Furthermore, a steel sleeve is further arranged in the strand hole in the cast-in-place column pier, the steel sleeve penetrates through the prestressed anchor bolt group, and the prestressed steel strand penetrates through the steel sleeve to connect the two opposite precast beams.

Further, the prestressed steel strand is connected with the precast beam through anchoring.

Further, the cast-in-place beam structure further comprises a cast-in-place bottom plate, and the cast-in-place bottom plate is connected with the precast beam and the cast-in-place pier.

By adopting the wind driven generator foundation provided by the application, the bearing beam of the foundation can be standardized, the foundation can be prefabricated in advance according to wind driven generator sets with different sizes, during construction, the bearing beam is only required to be connected to the anchor bolt group arranged on site, and then the bearing beam is poured by materials such as concrete to form an integrated generator foundation, and finally the wind driven generator is fixed on the anchor bolt group, so that the construction difficulty is effectively reduced, the construction period is shortened, and the large-scale application of the wind driven generator set is facilitated to be promoted

Drawings

FIG. 1 is a plan view of a fabricated wind turbine foundation according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of a fabricated wind turbine foundation structure according to an embodiment of the present application;

FIG. 3 is a plan view of a prestressed steel strand arrangement according to one embodiment of the present application;

FIG. 4 is a schematic cross-sectional view of one embodiment of the present application showing the arrangement of pre-stressed steel strands;

fig. 5 is a sectional view of a precast beam of one embodiment of the present application, taken along a-a direction of fig. 3.

Detailed Description

The technical solutions in the embodiments of the present application will be further clearly and completely described below with reference to the accompanying drawings, but it should be noted that the following embodiments are only some preferred embodiments in the present application, and do not refer to all embodiments covered by the technical solutions of the present application.

It should be noted that when an element is referred to as being "fixed" to another element in the description of the present application, it may be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1 is a plan view of a foundation of an assembled wind turbine according to an embodiment of the present invention, which includes 8 precast girders 1, a cast-in-place floor 2, a cast-in-place pier 3, and a prestressed anchor bolt group 4. The method comprises the following steps that an annular prestressed anchor bolt group 4 is built on a construction site, prefabricated beams 1 are manufactured in advance and conveyed to the construction site, the prefabricated beams are arranged along the circumferential direction of the prestressed anchor bolt group 4, the end portions of 8 prefabricated beams 1 are connected with the prestressed anchor bolt group 4, the 8 prefabricated beams 1 are arranged in pairs, and every two prefabricated beams 1 are located on the same diameter line of the prestressed anchor bolt group 4. The cast-in-place pier 3 and the cast-in-place bottom plate 2 are cast-in-place structures, including but not limited to concrete structures, wherein the cast-in-place pier 3 is formed by casting around the prestressed anchor bolt group 4 and the end part of the prestressed anchor bolt group 4 connected with the precast beam 1, so that the prestressed anchor bolt group 4 and the 8 precast beams 1 are combined into a whole to form a foundation for supporting the wind driven generator.

The cast-in-place pier 3 shown in fig. 1 has a cylindrical shape, but this is not the entire structural type of the cast-in-place pier 3 to which the present application relates, and those skilled in the art can adapt an appropriate structure according to the conditions of field construction as long as the prestressed anchor assemblies 4 and the precast girders 1 can be combined together. The cast-in-place bottom plate 2 is paved at the bottom of the wind driven generator foundation to form a bottom plate, so that the bottoms of the adjacent precast beams 1 are connected with the bottom of the cast-in-place pier 3, and the strength of the wind driven generator foundation is further enhanced.

Fig. 2 is a sectional view of an assembled wind turbine foundation structure according to an embodiment of the present disclosure, in which a

pre-stressed anchor group

4 and 8 precast girders 1 are combined together through a cast-in-place pier 3 and fixed on the ground, an end of the pre-stressed anchor group 4 may be connected to a wind turbine, during a construction process, a tower of the wind turbine is connected to the pre-stressed anchor group 4, and then a pre-tightening force is applied to the pre-stressed anchor group 4, so as to further fix the wind turbine.

By adopting the technical scheme provided by the application, the tower barrel of the wind driven generator is connected with the foundation through the prestressed anchor bolt group 4, so that the problem of foundation strength and rigidity mutation can be solved, and because the foundation concrete in the anchor bolt action range is in a stressed state, cracks can not be generated, and the durability of the foundation is improved.

Fig. 3 shows a plan view of a prestressed steel strand arrangement according to an exemplary embodiment of the present application. A strand hole is formed in the precast beam 1, and a strand hole corresponding to the cast-in-situ pier 3 is reserved in the cast-in-situ pier 3 in site arrangement, so that a prestressed steel strand 6 can penetrate through the cast-in-situ pier 3 to connect the two opposite precast beams 1 together. Fig. 3 shows an arrangement of prestressed steel strands 6, wherein the prestressed steel strands 6 connecting the opposite precast beams 1 are set as one group, each group including four prestressed steel strands 6, respectively provided at the top and bottom of the cast-in-place pier 3 and the precast beam 1. Four groups of staggered and superposed prestressed steel strands 6 respectively penetrate through the cast-in-place pier 3 to be connected with the two opposite precast beams 1, so that structural support and pretightening force are further provided for the assembled wind driven generator foundation. It should be noted that the prestressed steel strand 6 arranged in the above manner is only one of the embodiments in the present application, and other types of arrangement schemes are allowed in the present application, which can further combine the opposite precast girders 1 with the cast-in-place pier 3 and the prestressed anchor bolt group 4. In addition, a steel sleeve 8 is arranged in a strand hole penetrating through the joint of the cast-in-situ pier 3 and the prestressed anchor bolt group 4, so that the prestressed steel strand 6 in the region can penetrate through the steel sleeve 8 to be connected, and the compression-resistant bearing capacity in the region is further enhanced.

Fig. 4 is a schematic cross-sectional view of a wind turbine foundation showing arrangement of prestressed steel strands according to an embodiment of the present application, in which two prestressed steel strands 6 in each group are respectively disposed at the top and bottom of the wind turbine foundation and penetrate through a precast beam 1 and a cast-in-place pier 3, and ends of the prestressed steel strands 6 are connected to the precast beam 1 through anchor heads 7. It should be noted that, other structural arrangements, such as those arranged in the middle of the foundation, are acceptable in the present application as long as they can penetrate through the cast-in-place pier 3 to connect the two opposite precast beams 1 to form the internal connection force, and those skilled in the art can design different connection modes according to the needs.

The prestressing force stranded wire 6 of radial distribution that this application adopted replaces conventional owner muscle, can improve structural strength, improves basic crack resistance, consequently can reduce the arrangement of reinforcement of precast beam 1 on the basis, guarantees simultaneously that precast beam 1 is connected to the reliability of prestressing anchor bolt group 4, has greatly improved assembled aerogenerator basic overall stability. Through the prestressed steel strands 6 arranged in the radial direction and the prestressed anchor bolt groups 4 arranged in the longitudinal direction, pretightening forces in multiple directions are formed in the assembled wind driven generator foundation, so that the fatigue stress of reinforcing steel bars in the wind driven generator foundation is greatly reduced, and the fatigue resistance of the wind driven generator foundation is improved.

Fig. 5 is a cross-sectional view of the precast beam of an embodiment of the present application, taken along the direction a-a in fig. 3, in which prestressed steel strands 6 are respectively disposed at the top and bottom of the precast beam 1, the precast beam 1 is in an inverted T shape, and the haunched beams 5 are symmetrically disposed along corner regions on both sides of the bottom of the inverted T-shaped precast beam 1, so as to increase the structural strength of the precast beam 1. Adopt the precast beam 1 of the style of calligraphy of falling T structure, simple structure on the one hand, bearing strength is higher, and on the other hand, can save cast-in-place bottom plate 2's material, reduces construction cost. The span of the cast-in-place bottom plate 2 poured at the bottom of the inverted T-shaped precast beam 1 is smaller, the structural size of the cast-in-place bottom plate 2 and the number of reinforcing bars can be effectively reduced, the construction cost is reduced, and better economic benefits are achieved.

It should be noted that the precast beam 1 provided in embodiment 1 of the present application is in an inverted T shape, but this is not all types included in the present application, and other forms of precast beams 1, such as a rectangle, a boss shape, etc., can meet the requirements of the technical solution of the present application, and a wind turbine foundation prefabricated in advance and capable of being combined with other structures cast in place to form an integral body is all allowed by the present application. In addition, 8 precast beams 1 that this application scheme set up are not exclusive, and the designer can match the precast beam 1 of different quantity according to the load size that will support and precast beam 1 self structural performance.

The application provides an assembled aerogenerator basis divides the basis into a plurality of subsections, and wherein precast beam can make in advance and accomplish, only need assemble anchor bolt group and precast beam together at the job site, accomplish other supplementary processes again can. Through the technical scheme provided by the application, the wind generating sets with different sizes can be well dealt with, the standardized production of the precast beam is realized, the installation process is simple, the construction cost is low, particularly, the wind generating sets can play a good role when being arranged on a large scale, and the construction period is greatly shortened.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An assembled wind turbine foundation, comprising:

the prestressed anchor bolt group is annular and is used for receiving the wind driven generator;

the precast beams are arranged along the circumferential direction of the prestressed anchor bolt group;

and the prestressed steel strand is connected with the two opposite precast beams.

2. The assembled wind turbine foundation of claim 1, wherein the two opposite precast beams are located on the same diameter line of the prestressed anchor bolt group.

3. The assembled wind turbine foundation of claim 2, wherein the precast beam is inverted T-shaped in cross section.

4. The assembled wind turbine foundation of claim 3, wherein the precast beam bottom includes symmetrical haunched beams on both sides.

5. The fabricated wind turbine foundation of claim 1, further comprising a cast-in-place pier integrated with the set of pre-stressed anchors and connecting the plurality of precast beams.

6. The assembly type wind driven generator foundation of claim 5, wherein the precast beams and the cast-in-place pier respectively comprise stranded wire holes, and the prestressed steel stranded wires penetrate through the stranded wire holes to connect the two opposite precast beams.

7. The fabricated wind turbine foundation of claim 6, wherein the strand holes are provided at the top and bottom of the precast beam and the cast-in-place pier.

8. The assembly type wind driven generator foundation according to claim 7, wherein a steel sleeve is further arranged in the strand hole of the cast-in-place column pier, the steel sleeve penetrates through the prestressed anchor bolt group, and the prestressed steel strand penetrates through the steel sleeve to connect the two opposite precast beams.

9. The assembled wind turbine foundation of claim 6, wherein the prestressed steel strands are connected to the precast beams by anchoring.

10. The assembly type wind power generator foundation of any one of claims 1-9, further comprising a cast-in-place floor plate connecting the precast beam and the cast-in-place pier.