CN112412707B - A circular cross-section concrete support structure for assembled wind turbines - Google Patents
A circular cross-section concrete support structure for assembled wind turbines Download PDFInfo
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- CN112412707B CN112412707B CN202011386860.5A CN202011386860A CN112412707B CN 112412707 B CN112412707 B CN 112412707B CN 202011386860 A CN202011386860 A CN 202011386860A CN 112412707 B CN112412707 B CN 112412707B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
本发明公开了一种装配式风电机组圆截面混凝土支撑结构，包括至少一个结构单元，结构单元包括混凝土塔段、塔段内纵向钢筋、上法兰盘、下法兰盘、上预应力钢绞线、下预应力钢绞线、高强螺栓，所述塔段纵向钢筋与上、下法兰盘一体铸造形成整体框架，混凝土浇筑于上、下法兰盘之间，并将塔段纵向钢筋包裹在内，所述上、下预应力钢绞线通过预张拉将多个结构单元环向相连，所述上、下法兰盘通过高强螺栓将多个结构单元竖向相连，形成圆锥形整体。本发明在满足工厂分片预制、现场整体拼装要求的同时有效提高了混凝土塔筒的整体性和安装。
The present invention discloses a circular cross-section concrete support structure of an assembled wind turbine generator, comprising at least one structural unit, wherein the structural unit comprises a concrete tower section, longitudinal steel bars in the tower section, an upper flange, a lower flange, an upper prestressed steel strand, a lower prestressed steel strand, and high-strength bolts. The longitudinal steel bars of the tower section are integrally cast with the upper and lower flanges to form an integral frame, concrete is poured between the upper and lower flanges, and the longitudinal steel bars of the tower section are wrapped therein, the upper and lower prestressed steel strands are pre-tensioned to connect a plurality of structural units in an annular direction, and the upper and lower flanges are vertically connected to a plurality of structural units by high-strength bolts to form a conical whole. The present invention effectively improves the integrity and installation of the concrete tower while meeting the requirements of prefabrication in factory segments and overall assembly on site.
Description
Technical Field
The invention belongs to the field of civil engineering, and relates to a circular section concrete supporting structure of an assembled wind turbine generator.
Background
Since 2007, china becomes the largest carbon dioxide emission country worldwide, and the increasing energy demand is contradicted by the serious energy saving and emission reduction tasks. The wind power generation system has rich land wind power resources in China, and the development of wind power sources becomes an important component of the national energy structure transformation strategy. In order to obtain stable generated energy, the wind turbine generator is erected in the high air through a supporting structure. In recent years, the single-machine capacity, the hub height and the wind wheel diameter of the wind power structure are gradually improved, and the traditional conical steel tower supporting structure is more and more difficult to meet the trend of large-scale development of the wind power structure due to the limited bearing capacity. First, the increase in wall thickness of round steel pipes has limited contribution to the component's lateral stiffness, and the increase in diameter is limited by processing costs and transportation conditions. Secondly, local buckling of the cross section of the round steel pipe can lead the bending resistance of the cross section to be rapidly reduced, and the cross section can be more serious along with the increase of the radius-thickness ratio.
The cost of concrete per cube is less than one tenth of that of steel per ton, and the introduction of concrete can reduce the steel consumption of the supporting structure, so that the application limitation of the wind power structure caused by the problems of cost and the like can be broken through. In order to reduce the transportation size and the hoisting weight, the concrete tower is usually prefabricated by factory in sections and integrally assembled on site, but the transverse joints and the vertical joints generated by the method not only damage the structural integrity, but also affect the construction quality and the construction progress. For example, the wet connection of the filling joint is smoothed by the grouting material, so that the construction quality inside the sealing strip cannot be checked visually, and the construction is interrupted because the strength is difficult to improve in winter construction. According to the invention, the longitudinal steel bars of the tower sections and the connecting flange plates are integrally cast to form the frame, and then the frame is tensioned to form a whole through the circumferential prestress bars, so that the ductility and stability of the tower barrel are improved, the installation efficiency of each tower section is also improved, and the effective compatibility of high integrity and quick construction is realized. The adverse effects of excessively high installation accuracy requirements and winter construction are avoided.
Disclosure of Invention
Technical problems: the invention provides the circular section concrete supporting structure of the assembled wind turbine generator, which can effectively enhance the integrity and improve the construction efficiency.
The technical scheme is as follows: the utility model provides an assembled wind turbine generator system circular cross-section concrete bearing structure, its characterized in that, this structure includes at least one structural unit, structural unit includes a section concrete tower section, an upper flange dish, a lower flange dish, many with upper flange dish and the continuous longitudinal reinforcement of lower flange dish, a plurality of high strength bolts, be located the prestressing force steel strand wires of tower section upper portion, be located the prestressing force steel strand wires of tower section lower part, upper flange dish and lower flange dish and longitudinal reinforcement are integrative to cast, concrete tower section pours between upper flange dish and lower flange dish, wraps up tower section longitudinal reinforcement in, upper flange dish and lower flange dish are reserved there is double evenly distributed's bolt hole, upper prestressing force steel strand wires and lower prestressing force steel strand wires are added certain initial prestressing force in advance.
Furthermore, the circular section concrete supporting structure of the assembled wind turbine generator is characterized in that an upper prestressed duct and a lower prestressed duct which are communicated along the cross section are reserved at the top and the bottom of the concrete tower section and are respectively used for penetrating through the upper prestressed steel strand and the lower prestressed steel strand. And upper grooves and lower grooves are reserved in the middle of the upper pre-stress pore canal and the lower pre-stress pore canal and are respectively used for anchoring the upper pre-stress steel strand and the lower pre-stress steel strand.
Furthermore, the circular section concrete supporting structure of the assembled wind turbine generator is characterized by comprising a plurality of structural units which are connected with each other in pairs through high-strength bolts in the vertical direction.
Furthermore, the circular section concrete supporting structure of the assembled wind turbine generator is characterized by comprising a plurality of structural units which are sequentially connected in the horizontal direction through prestressed steel strands to form a circular section.
Furthermore, the circular section concrete supporting structure of the assembled wind turbine generator is characterized in that a plurality of structural units are connected with one another to form an integral tower with the circular section gradually becoming smaller from bottom to top.
The beneficial effects are that: compared with the prior art, the invention has the following advantages:
(1) The invention adopts a full-dry connection mode of the flange plate heightening strong bolts and the prestress steel strand hoops, thereby greatly improving the field assembly efficiency. The wet connection of grouting material is needed to wait for the grouting material to reach a certain strength and then to hoist the next section, the field installation efficiency is low, and the construction is interrupted because the strength is difficult to improve in winter construction. The invention realizes the connection of the transverse joint and the vertical joint through the flange bolts and the circumferential prestress steel strand, and the assembly efficiency is greatly improved.
(2) The invention adopts the scheme of casting the flange plate and the longitudinal steel bar integrally, thereby reducing the processing precision requirement and avoiding the on-site levelness adjustment link. The tower has very different height-to-width ratio, and the adoption of dry connection often makes construction difficult because of poor levelness of the prefabricated parts, and a great deal of time is required for on-site grinding to adjust levelness. According to the invention, the longitudinal steel bars and the flange plates are integrally cast, and the distance and levelness of the upper flange plate and the lower flange plate are fixed by the longitudinal steel bars, so that the precision of the prefabricated part is higher.
(3) The invention can effectively enhance the survivability of the tower barrel structure under extreme disasters. The section bending moment of the tower barrel is also very large due to the fact that the height is large, when the adjacent sections are not connected by steel bars at joints, the ductility and the energy consumption capability of the joints are low under extreme disasters such as earthquakes and typhoons, irreversible brittle injuries are easy to occur, repair is difficult, and collapse of the tower barrel is easy to cause. The invention can not only make the concrete in the tower section in a circumferential compression state, but also make the steel bars in the tower section participate in energy consumption, thereby greatly improving the anti-capsizing capability of the tower barrel supporting structure under extreme disasters.
Drawings
FIG. 1 is a three-dimensional schematic of the present invention (casting concrete);
Fig. 2 is a front view (concreting) of the present invention;
FIG. 3 is a three-dimensional schematic of the present invention (without concreting);
FIG. 4 is a front view of the present invention (without concreting);
FIG. 5 is an elevation view of a high strength bolted connection;
FIG. 6 is a front view of the upper and lower flanges;
FIG. 7 is a horizontal segment assembly view of 4 building blocks;
FIG. 8 is an overall assembly view of a tower consisting of 12 structural units;
the drawings are as follows: the concrete tower section 1, an upper prestressed duct 11, a lower prestressed duct 12, an upper groove 13, a lower groove 14, an upper flange 2, a lower flange 3, a longitudinal reinforcing steel bar 4 of the tower section, a high-strength bolt 5, an upper prestressed steel strand 6, a lower prestressed steel strand 7 and a bolt hole 8.
Detailed Description
As shown in figures 1-6, the circular section concrete supporting structure of the assembled wind turbine generator can divide the tower barrel into a plurality of structural units along the circumferential direction for prefabrication when the cross section of the tower barrel is larger, and can divide the tower barrel into a plurality of structural units along the longitudinal direction for prefabrication when the height of the tower barrel is larger. The structure unit comprises a section of concrete tower section 1, an upper flange plate 2 and a lower flange plate 3 which are identical in structure, a plurality of longitudinal steel bars 4 connecting the upper flange plate 2 and the lower flange plate 3, a plurality of high-strength bolts 5, a prestressed steel strand 6 positioned at the upper part of the tower section and a prestressed steel strand 7 positioned at the lower part of the tower section, wherein the upper flange plate 2, the lower flange plate 3 and the longitudinal steel bars 4 are integrally cast in a factory, the concrete tower section 1 is poured between the upper flange plate 2 and the lower flange plate 3, the longitudinal steel bars 4 of the tower section are wrapped in the concrete tower section, double rows of bolt holes 8 which are uniformly distributed are reserved in the upper flange plate 2 and the lower flange plate 3, and a certain initial prestress is pre-applied to the upper prestressed steel strand 6 and the lower prestressed steel strand 7.
The top of the concrete tower section 1 is reserved with a through upper prestressed duct 11, the bottom is reserved with a through lower prestressed duct 12, and the middle positions of the upper and lower ducts are respectively provided with an upper groove 13 and a lower groove 14. The upper prestressed steel strand 6 and the upper prestressed steel strand 7 are respectively placed in the upper prestressed duct 11 and the lower prestressed duct 12, and the upper and lower grooves are used for anchoring the prestressed steel strand and conveniently leading out the prestressed steel strand so as to penetrate through the whole cross section.
When the construction units are manufactured in the above manner, the construction units can be connected to form an integral tower as shown in fig. 7-8. If a plurality of structural units cannot be closed in the circumferential direction due to manufacturing errors, epoxy resin can be properly coated for leveling, and then the prestressed steel strand is tensioned in the circumferential direction, so that all the circumferential structural units are connected into a whole. And then vertically connecting a plurality of structural units spliced into a ring, placing high-strength bolts into the reserved bolt holes on the flange plates, and applying pretightening force to enable the adjacent flange plates to be connected to form an integral tower.
Claims (2)
1. The circular section concrete supporting structure of the assembled wind turbine generator system is characterized by comprising a structural unit, wherein the structural unit comprises a section of concrete tower section (1), an upper flange plate (2), a lower flange plate (3), a plurality of longitudinal steel bars (4) connecting the upper flange plate (2) and the lower flange plate (3), a plurality of high-strength bolts (5), a prestressed steel strand (6) positioned at the upper part of the tower section and a prestressed steel strand (7) positioned at the lower part of the tower section, the upper flange plate (2), the lower flange plate (3) and the longitudinal steel bars (4) are integrally cast, the concrete tower section (1) is poured between the upper flange plate (2) and the lower flange plate (3), the longitudinal steel bars (4) of the tower section are wrapped in the upper flange plate (2) and the lower flange plate (3), double rows of uniformly distributed bolt holes (8) are reserved in the upper prestressed steel strand (6) and the lower prestressed steel strand (7) are prestressed by a certain initial prestress;
The device comprises a plurality of structural units which are sequentially connected in the horizontal direction through prestress steel strands to form a circular section; and a plurality of structural units which are connected in pairs in the vertical direction through high-strength bolts in the flange plate; and after the structural units are connected with each other, an integral tower with the circular section gradually becoming smaller from bottom to top is formed.
2. The circular section concrete support structure of the assembled wind turbine generator system according to claim 1, wherein the concrete tower section (1) is provided with an upper pre-stress channel (11) and a lower pre-stress channel (12) which are communicated with each other along the cross section at the top and the bottom and respectively used for penetrating an upper pre-stress steel strand (6) and a lower pre-stress steel strand (7), and an upper groove (13) and a lower groove (14) are reserved in the middle of the upper pre-stress channel (11) and the lower pre-stress channel (12) and respectively used for anchoring the upper pre-stress steel strand (6) and the lower pre-stress steel strand (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011386860.5A CN112412707B (en) | 2020-12-01 | 2020-12-01 | A circular cross-section concrete support structure for assembled wind turbines |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011386860.5A CN112412707B (en) | 2020-12-01 | 2020-12-01 | A circular cross-section concrete support structure for assembled wind turbines |
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| CN112412707A CN112412707A (en) | 2021-02-26 |
| CN112412707B true CN112412707B (en) | 2024-09-27 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922788A (en) * | 2021-03-09 | 2021-06-08 | 中国电建集团西北勘测设计研究院有限公司 | Fan tower section of thick bamboo precast concrete component and fan tower section of thick bamboo |
| CN114033625A (en) * | 2021-11-30 | 2022-02-11 | 华电重工机械有限公司 | Wind power tower cylinder foundation shell ring structure |
| CN114294173A (en) * | 2021-12-20 | 2022-04-08 | 山东中车风电有限公司 | High-power generator set tower and construction method thereof |
| CN115726618B (en) * | 2022-12-13 | 2025-07-29 | 中国铁塔股份有限公司湖北省分公司 | Assembled communication pole tower and communication pole tower structure |
| CN117345743B (en) * | 2023-10-24 | 2026-03-17 | 重庆大学 | Tower connecting flanges, prefabricated hollow sandwich steel-concrete composite towers and wind power structures |
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