Conversion section structure of UHPC wind power tower and wind power tower

Abstract

The utility model discloses a conversion section structure of a UHPC wind power tower, which comprises a UHPC tower tube connecting section, a UHPC tower column connecting section and a UHPC connecting beam, and the UHPC tower column connecting section is fixedly arranged on the periphery of the UHPC tower tube connecting section through the UHPC connecting beam; a plurality of upper tower barrel structure prestress anchoring racks are arranged in the UHPC tower barrel connecting section, and a lower tower column structure prestress anchoring rack is arranged in the UHPC tower column connecting section; the arrangement position of one or more upper tower tube structure prestress anchoring racks in the UHPC tower tube connecting section is located at the joint of a web of the UHPC connecting beam and the UHPC tower tube connecting section. The utility model further provides a UHPC wind power tower. The conversion section structure of the UHPC wind power tower is light in dead weight and reasonable in structure, and compared with a conversion section of a traditional steel structure wind power tower, a large number of on-site tedious welding and bolting construction processes are omitted, construction efficiency can be remarkably improved, construction quality is guaranteed, and later operation and maintenance are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power generation, and in particular relates to an auxiliary connection structure of a wind power tower and a wind power tower. Background Art

[0002] With the advancement of technology and the reduction of costs, wind power generation has become an important part of China's energy structure transformation. In the future, as China's demand for clean energy continues to increase, and with the support of technology and policies, wind power generation is expected to continue to develop rapidly and play a more important role in the energy field. However, at present, medium and low-altitude wind resources have been basically developed. Wind power generation needs to develop to an altitude of more than 200m and increase the capacity of single units. Therefore, large-scale wind turbines are an important development trend in the wind power industry. Large megawatts, long blades and high towers have become one of the important breakthroughs for wind power in the parity market.

[0003] A new type of multi-segment lattice UHPC wind power tower structure proposed in patent application CN116641845A has the advantages of low cost, good stability, good fatigue resistance and durability, etc. It can better solve the series of problems caused by the wind power tower raising the tower height. This new tower structure needs to set a connection conversion section at the top of the lattice tower column to realize the connection between the lattice tower column and the tower above it, so as to ensure the overall force performance of the tower column. The method of this patent is to install a steel conversion section above the lattice segment through a flange structure, and the tower is installed on the steel conversion section through a sleeve with a conical plate. This connection method requires welding or bolting at high altitude, which is difficult to construct, and the construction quality is difficult to guarantee. In addition, the cost of operation and maintenance of the steel conversion section in the later stage is high. Therefore, it is necessary to design a more rationally structured conversion section structure, which has the advantages of easy construction, simple transportation and hoisting, and low later operation and maintenance costs, which is of great significance. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies and defects mentioned in the above background technology and provide a conversion section structure and a wind tower of a UHPC wind tower which has a reasonable structure, is easy to construct, is simple to transport and hoist, and has low subsequent operation and maintenance costs.

[0005] In order to solve the above technical problems, the technical solution proposed by the utility model is:

[0006] A conversion section structure of a UHPC wind power tower, comprising a UHPC tower barrel connecting section, a UHPC tower column connecting section and a UHPC connecting beam, wherein the UHPC tower column connecting section is fixedly arranged on the periphery of the UHPC tower barrel connecting section through the UHPC connecting beam;

[0007] The UHPC tower connection section is provided with a plurality of upper tower structure prestressed anchoring racks for prestressed anchoring of the upper tower structure above the conversion section structure, and the outer wall of the UHPC tower column connection section is provided with lower tower column structure prestressed anchoring racks for prestressed anchoring of the lower tower column structure below the conversion section structure;

[0008] One or more of the upper tower structure prestressed anchor racks (i.e., part or all of the upper tower structure prestressed anchor racks) are disposed in the UHPC tower connection section at the connection between the web of the UHPC connection beam and the UHPC tower connection section.

[0009] In the utility model, by arranging the prestressed anchoring rack of the upper tower structure and the prestressed anchoring rack of the lower tower column structure, the anchoring of the conversion section structure with the upper tower structure and the lower tower column structure can be achieved respectively. In a more preferred solution, all the upper tower structure prestressed anchor racks are arranged in the UHPC tower connection section at the connection between the web of the UHPC connection beam and the UHPC tower connection section (that is, the arrangement position of the upper tower structure prestressed anchor rack and the connection position between the web of the UHPC connection beam and the UHPC tower connection section are respectively located on the inner and outer surfaces of the same position of the side wall of the UHPC tower connection section), and the number of the upper tower structure prestressed anchor racks can match the number of webs of the UHPC connection beam (which is a hollow structure). For example, if there are 3 UHPC connection beams, there are 6 webs. At this time, 6 upper tower structure prestressed anchor racks are arranged, and the 6 upper tower structure prestressed anchor racks correspond to the 6 webs one by one, respectively, and are located at different positions of the UHPC tower connection section, and the upper tower structure prestressed anchor racks and webs arranged one by one are respectively located on the inner and outer surfaces of the same position of the side wall of the UHPC tower connection section.

[0010] The upper tower structure prestressed anchor rack is arranged in the UHPC tower connection section at the connection between the web of the UHPC connection beam and the UHPC tower connection section, which means that the upper tower structure prestressed anchor rack is aligned with the web of the UHPC connection beam, and is respectively located on the inner and outer surfaces of the same position of the side wall of the UHPC tower connection section. The upper tower structure prestressed anchor rack can be obtained by extending the web of the UHPC connection beam into the UHPC tower connection section. With the above arrangement, the web of the UHPC connection beam and the upper tower structure prestressed anchor rack work together to make the overall force of the conversion section more reasonable, reduce the risk of cracking or even damage caused by excessive local prestress at the position of the UHPC tower connection section and the UHPC connection beam, and help improve the anchoring effect of the UHPC tower connection section and the upper tower structure. In addition, the prestressed anchor rack of the upper tower structure is located inside the UHPC tower connection section, which makes it easy to observe whether the UHPC connecting beams are evenly distributed along the UHPC tower connection section as required during construction, and also facilitates subsequent operation and maintenance.

[0011] In the conversion section structure of the above-mentioned UHPC wind power tower, preferably, the anchoring position of the prestressed anchoring rack of the upper tower structure is lower than the anchoring position of the prestressed anchoring rack of the lower tower column structure. The above-mentioned setting method is that the anchoring position of the prestressed beam at the prestressed anchoring rack of the upper tower structure is located at its lower side, and the anchoring position of the prestressed beam at the prestressed anchoring rack of the lower tower column structure is located at its upper side. The above-mentioned two anchoring positions for anchoring the upper tower structure and the lower tower column structure are staggered to eliminate the prestressed blank area and realize the smooth conversion from tower column prestressing to tower prestressing.

[0012] In the conversion section structure of the above-mentioned UHPC wind turbine tower, preferably, the UHPC tower connection section is a hollow structure, and a first diaphragm and a second diaphragm are provided in the UHPC tower connection section. The first diaphragm is provided in two upper and lower sections, and the upper first diaphragm is located at the top of the UHPC tower connection section, and the top surface position of the lower first diaphragm is kept flush with the upper top surface of the UHPC connecting beam, and the bottom surface position of the second diaphragm is kept flush with the lower bottom surface of the UHPC connecting beam. In the utility model, the material of the UHPC tower connection section is UHPC, which allows its wall thickness to be thin. Usually, the wall thickness of the upper tower segment is thicker, which will be thicker than the wall thickness of the UHPC tower connection section. The first diaphragm is provided at the upper edge of the UHPC tower connection section, which avoids the disadvantage of cross-sectional mutation caused by the thick wall of the upper tower segment and the thin wall thickness of the UHPC tower connection section. At the same time, the first and second diaphragms are set in the UHPC tower connection section to improve the structural strength and rigidity, which can effectively reduce the radial deformation of the tower column. At the same time, the first and second diaphragms provide additional construction space, which is convenient for the inspection of the prestressed anchoring conditions in the later stage. The height positions of the first and second diaphragms below are made consistent with the upper and lower edges of the UHPC connecting beam, so that under the action of large bending moments, the UHPC tower and the UHPC connecting beam can better coordinate the force, which is more conducive to the transmission of force, and can further increase the structural strength and rigidity, so that it can play a safe and stable role at high altitudes.

[0013] In the above-mentioned conversion section structure of the UHPC wind power tower, preferably, the centers of the first transverse partition and the second transverse partition are hollowed out to form an elevator shaft passage, through which the installation, construction and maintenance of the equipment can be facilitated.

[0014] In the above-mentioned conversion section structure of the UHPC wind tower, preferably, the bottom of the prestressed anchoring rack of the upper tower structure is attached to the top surface of the second transverse diaphragm, and the upper part of the prestressed anchoring rack of the upper tower structure is attached to the bottom surface of the first transverse diaphragm above, and the first transverse diaphragm and the second transverse diaphragm are provided with a plurality of first prestressed beam reserved channels corresponding one-to-one to the prestressed anchoring rack of the upper tower structure, and the opening position of the first prestressed beam reserved channels matches the prestressed anchoring rack of the upper tower structure; the prestressed anchoring rack of the upper tower structure is connected to the upper tower structure through the prestressed beam of the upper tower structure, and the prestressed beam of the upper tower structure is arranged in the inner cavity of the upper tower structure, and the anchoring position of the prestressed beam of the upper tower structure and the prestressed anchoring rack of the upper tower structure is located at the bottom of the second transverse diaphragm. The prestressed anchor rack of the upper tower structure is located between the first diaphragm and the second diaphragm above to facilitate the prestressed tensioning operation, which can prevent the prestressed anchor rack of the upper tower structure from being exposed to the sun and rain for a long time, extend the service life of the anchor structure, and facilitate later maintenance. The reserved hole of the first prestressed bundle can facilitate the passage of the prestressed bundle of the upper tower structure.

[0015] In the above-mentioned conversion section structure of the UHPC wind power tower, preferably, the UHPC tower column connection section and the UHPC connection beam are both hollow structures, and the UHPC tower column connection section is provided with a vertical local stiffening rib of the tower column, and the setting position of the vertical local stiffening rib of the tower column and the connection position of the web of the UHPC connection beam and the UHPC tower column connection section are respectively located on the inner and outer surfaces of the same position of the side wall of the UHPC tower column connection section; the lower tower column structure prestressed anchor rack is arranged in the inner cavity of the UHPC tower column connection section, and a second prestressed beam reserved channel is provided in the lower tower column structure prestressed anchor rack, and the lower tower column structure prestressed anchor rack is connected to the lower tower column structure through the lower tower column structure prestressed beam, and the anchoring position of the lower tower column structure prestressed beam and the lower tower column structure prestressed anchor rack is located 0.5-1m below the bottom surface of the top plate of the UHPC tower column connection section. In the utility model, the top surface of the UHPC connecting beam is flush with the top surface of the UHPC tower column connecting section. By setting the vertical local stiffening ribs of the tower column, the local strength of the UHPC tower column connecting section can be strengthened, the overall bending, shear, torsional strength and stiffness can be improved, and the mechanical properties can be improved to adapt to complex wind load environments and meet the mechanical performance requirements of the transition section structure. The above-mentioned vertical local stiffening ribs of the tower column can be obtained by extending the web of the UHPC connecting beam into the UHPC tower column connecting section, so that the overall force of the transition section is more reasonable, and the risk of excessive local prestress at the position of the UHPC tower column connecting section and the UHPC connecting beam, resulting in cracking or even damage, is reduced. In addition, the prestressed anchor rack of the lower tower column structure is arranged in the inner cavity of the UHPC tower column connecting section, and the prestressed anchor rack of the lower tower column structure is not exposed to the outside, so as to prevent it from being corroded and falling off, which may cause safety hazards, and improve the service life, while also facilitating subsequent maintenance. The provision of the reserved channel for the second prestressed bundle facilitates the passing of the prestressed bundle of the lower tower column structure.

[0016] In the conversion section structure of the above-mentioned UHPC wind tower, preferably, the upper edge of the inner cavity of the UHPC tower connecting section is provided with a plurality of first tower segment prestressed connection tooth blocks for prestressed connection of the UHPC tower connecting section with the upper tower segment of the upper tower structure, and the plurality of first tower segment prestressed connection tooth blocks are affixed between the upper and lower first transverse diaphragms and are staggered with the prestressed anchoring racks of the upper tower structure, and the upper and lower first transverse diaphragms are provided with a plurality of third prestressed beam reserved channels corresponding one-to-one to the first tower segment prestressed connection tooth blocks, and the first The opening positions of the three prestressed beam reserved channels match the prestressed connection tooth blocks of the first tower segment; the lower edge of the inner cavity of the upper tower segment is provided with a plurality of second tower segment prestressed connection tooth blocks corresponding to the first tower segment prestressed connection tooth blocks one by one, and the UHPC tower connection section and the upper tower segment are anchored by the segment connection prestressed beam, and the two ends of the segment connection prestressed beam are respectively anchored on the first tower segment prestressed connection tooth block and the second tower segment prestressed connection tooth block, and the middle part passes through the side wall of the UHPC tower connection section and the upper tower segment. In the utility model, the first tower segment prestressed connection tooth block is attached between the upper and lower first transverse partitions, which is convenient for the construction positioning of the first tower segment prestressed connection tooth block, and also convenient for unifying the tensioning end points of the prestressed beam in the first tower segment prestressed connection tooth block, so as to avoid the uneven tensioning prestress causing the UHPC tower to be eccentrically stressed. At the same time, the first tower segment prestressed connection tooth block and the first transverse partition are made into a synergistic whole, which is beneficial to improving the anchoring effect. In the utility model, the third prestressed bundle reserved channel is convenient for the passage of the segment connection prestressed bundle. The first tower segment prestressed connection tooth block is used to connect the UHPC tower connection section with the tower above it, so as to connect the conversion section structure with the tower above it. Preferably, prestressed steel strands can be used for anchoring between the above-mentioned first tower segment prestressed connection tooth block and the second tower segment prestressed connection tooth block, and the retraction prestress is small, which has the following advantages: reducing the amount of retraction, thereby ensuring the consolidation effect and durability; strong tensile strength, which can ensure the safety and stability of the project; and having high corrosion resistance and durability.

[0017] In the conversion section structure of the above-mentioned UHPC wind power tower, preferably, a plurality of first tower column segment prestressed connection tooth blocks for prestressed connection of the UHPC tower column connecting section with the lower tower column segment of the lower tower column structure are provided in the inner cavity of the UHPC tower column connecting section, and the plurality of first tower column segment prestressed connection tooth blocks are evenly distributed along the lower edge of the inner cavity of the UHPC tower column connecting section, and a plurality of second tower column segment prestressed connection tooth blocks corresponding to the first tower column segment prestressed connection tooth blocks are provided on the upper edge of the inner cavity of the lower tower column segment, and the UHPC tower column connecting section and the lower tower column segment are anchored by a segment connection prestressed beam, and the two ends of the segment connection prestressed beam are respectively anchored on the first tower column segment prestressed connection tooth block and the second tower column segment prestressed connection tooth block, and the middle part runs through the side walls of the UHPC tower column connecting section and the lower tower column segment. In the utility model, the first tower column segment prestressed connection tooth block is used for the UHPC tower column connection section and the tower column below it, so as to realize the connection between the conversion section structure and the tower column below it. Preferably, the prestressed steel strands can be used for anchoring between the first tower column segment prestressed connection tooth block and the second tower column segment prestressed connection tooth block, which has the following advantages: ensuring the consolidation effect and durability; strong tensile strength, which can ensure the safety and stability of the project; and having high corrosion resistance and durability. Preferably, the anchor matched with the segment connection prestressed bundle adopts a secondary tensioning low-retraction prestressed anchoring system, which has the following advantages: the prestress loss is controlled at about 5%, with high efficiency; the prestressing effect can be measured and controlled, convenient for acceptance, and quality assurance.

[0018] In the conversion section structure of the above-mentioned UHPC wind tower, preferably, the UHPC tower connection section is a hollow thin-walled structure with a variable cross-section, and the wall thickness is 0.1-0.2m, and the cross-section of the UHPC tower connection section gradually decreases from bottom to top, and the cross-section is circular or polygonal. In the utility model, due to the high mechanical strength of UHPC, the UHPC tower connection section using UHPC as the main material can be a hollow thin-walled structure, which can reduce weight. The UHPC tower connection section adopts a variable cross-section hollow thin-walled structure, which can be consistent with the cross-section change of the tower structure above, maintain the integrity of the structure, and facilitate the arrangement of prestress. The above-mentioned wall thickness setting can ensure mechanical strength while reducing the weight of the conversion section structure.

[0019] In the conversion section structure of the above-mentioned UHPC wind power tower, preferably, the UHPC tower column connection section is a hollow thin-walled structure, and the UHPC tower column connection section is vertically provided with multiple roots, which are evenly distributed around the vertical center line of the UHPC wind power tower. The cross section of the UHPC tower column connection section is circular or polygonal, and the outer diameter of the cross section is 2-4m. The upper half of the cross section is a constant cross section with a wall thickness of 0.1-0.2m, and the lower half is a variable cross section with a wall thickness changing from 0.1-0.2m to 0.2-0.4m from top to bottom. Due to the high mechanical strength of UHPC, the UHPC tower column connection section using UHPC as the main material adopts a hollow thin-walled structure to reduce weight. The dimensions of the UHPC tower column connection section are all protected and consistent, matching the lower tower column segment, and the number of UHPC tower column connection sections matches the number of lower tower columns, for example, it can be 3 or 4, because common wind power towers mostly use three-limb column and four-limb column structures, and the UHPC tower column connection section needs to match them. The above wall thickness setting can ensure the mechanical strength while reducing the weight of the conversion section structure.

[0020] In the conversion section structure of the above-mentioned UHPC wind turbine tower, preferably, the UHPC connecting beam is a hollow thin-walled structure, the wall thickness of the UHPC connecting beam is 0.1-0.4m, and the cross section is rectangular. Due to the high mechanical strength of UHPC, the UHPC connecting beam using UHPC as the main material adopts a hollow thin-walled structure to reduce weight. The above-mentioned wall thickness setting can ensure mechanical strength while reducing the weight of the conversion section structure.

[0021] As a general technical concept, the utility model also provides a UHPC wind power tower, including an upper tower structure and a lower tower column structure, wherein the upper tower structure includes an upper tower segment, and the lower tower column structure includes a lower tower segment, the upper tower structure and the lower tower column structure are connected via the above-mentioned conversion section structure, the upper tower structure and the UHPC tower connecting segment are connected via a prestressed beam tensioned by a prestressed anchoring rack of the upper tower structure, the lower tower column structure and the UHPC tower connecting segment are connected via a prestressed beam tensioned by a prestressed anchoring rack of the lower tower column structure, the top of the lower tower column segment is connected to the top of the UHPC tower connecting segment, and the bottom of the upper tower segment is connected to the top of the UHPC tower connecting segment.

[0022] The size of the bottom surface of the UHPC tower column connection section matches the size of the top surface of the lower tower column segment.

[0023] The utility model also provides a construction method of the above-mentioned UHPC wind power tower, comprising the following steps:

[0024] S1: prefabricate the conversion section structure, so that the UHPC tower connecting section, the UHPC tower column connecting section and the UHPC connecting beam are integrally cast, and the upper tower structure prestressed anchor rack and the lower tower column structure prestressed anchor rack are prefabricated at the same time;

[0025] S2: construct the lower tower column structure, then hoist and install the conversion section structure to the top of the lower tower column segment at the top of the lower tower column structure, so that the top of the lower tower column segment is connected to the bottom of the UHPC tower column connecting section through the segment connection prestressed beam, completing the preliminary connection between the conversion section structure and the lower tower column structure;

[0026] S3: tensioning the prestressed beam of the lower tower column structure between the lower tower column structure and the UHPC tower column connecting section through the prestressed anchoring rack of the lower tower column structure to achieve overall connection between the lower tower column structure and the conversion section structure;

[0027] S4: hoisting and installing the upper tower segment at the bottom layer of the upper tower structure onto the transition section structure, so that the bottom of the upper tower segment is connected to the top of the UHPC tower connection section through segment connection prestressing, completing the preliminary connection between the transition section structure and the upper tower segment, and then sequentially constructing other upper tower segments to complete the construction of the upper tower structure;

[0028] S5: tensioning the upper tower structure prestressed beam between the upper tower structure and the UHPC tower connecting section through the upper tower structure prestressed anchoring rack to achieve overall connection between the upper tower structure and the conversion section structure.

[0029] The construction method adopted by the utility model mainly uses UHPC as the structural material, and its compressive strength is much greater than its tensile strength. In the above construction method, the part that has been connected to the overall UHPC wind power tower is in a high compressive stress state as much as possible to avoid cracking, deformation or even damage caused by tension of part of the structure due to the arrangement and operation of the construction machinery.

[0030] In the utility model, the UHPC tower connection section, the UHPC tower column connection section and the UHPC connection beam are all made of UHPC materials with excellent mechanical properties. The axial tensile strength of the UHPC material is above 7MPa and the compressive strength is above 120MPa. Due to the high mechanical strength of UHPC, the UHPC tower connection section using UHPC as the main material can be a hollow cylindrical thin-walled structure, which can reduce weight and help increase the height of the wind tower.

[0031] Compared with the prior art, the advantages of the utility model are:

[0032] 1. The conversion section structure of the UHPC wind power tower of the utility model includes a UHPC tower tube connection section, a UHPC tower column connection section and a UHPC connection beam. Each component adopts UHPC with excellent mechanical properties and durability as the main material, which greatly reduces the material consumption, reduces the dead weight, and facilitates the hoisting construction.

[0033] 2. The conversion section structure of the UHPC wind turbine tower of the utility model is reasonable in structure. Compared with the conversion section of the traditional steel structure wind turbine tower, it gets rid of a large number of cumbersome on-site welding and bolting construction processes, which can significantly improve construction efficiency, ensure construction quality, and reduce later operation and maintenance.

[0034] 3. The conversion section structure of the UHPC wind tower of the utility model, the web of the UHPC connecting beam and the prestressed anchor rack of the upper tower structure work together to make the overall force of the conversion section more reasonable, reduce the risk of cracking or even damage caused by excessive local prestress at the position of the UHPC tower connecting section and the UHPC connecting beam, and help improve the anchoring effect of the UHPC tower connecting section and the upper tower structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 This is a three-dimensional schematic diagram of the conversion section structure of the UHPC wind tower in Example 1.

[0037] Figure 2 It is a schematic elevation diagram of the conversion section structure of the UHPC wind tower in Example 1 (the left half is the facade, and the right half is the cross section).

[0038] Figure 3 The schematic diagram of the conversion section structure of the UHPC wind power tower in Example 1 (the left half is Figure 1 The top view of Figure 1 Cross-sectional view from top view).

[0039] Figure 4 This is a three-dimensional schematic diagram of the UHPC tower connection section in Example 1.

[0040] Figure 5 This is a three-dimensional schematic diagram of the connection section of a single UHPC tower column in Example 1.

[0041] Figure 6Schematic diagram of the connection between the conversion section structure of the UHPC wind tower in Example 1, the upper tower structure and the lower tower column structure.

[0042] Figure 7 This is a schematic diagram of the structure of the UHPC tower connection section and the upper tower segment in Example 1.

[0043] Figure 8 Schematic diagram of the structure of the UHPC tower column connecting section and the lower tower column segment in Example 1.

[0044] Fig. 9 This is a three-dimensional schematic diagram of the UHPC wind tower in Example 1.

[0045] Fig.10 This is a three-dimensional schematic diagram of the conversion section structure of the UHPC wind tower in Example 2.

[0046] Legend

[0047] 1. UHPC tower connection section; 11. First transverse diaphragm; 12. Second transverse diaphragm; 13. Prestressed anchoring rack of upper tower structure; 14. Prestressed connecting rack block of first tower segment; 2. UHPC tower column connection section; 21. Prestressed anchoring rack of lower tower column structure; 22. Prestressed connecting rack block of first tower column segment; 23. Vertical local stiffening rib of tower column; 3. UHPC connecting beam; 41. Reserved channel for first prestressed beam; 42. Reserved channel for second prestressed beam; 43. Reserved channel for third prestressed beam; 5. Upper tower structure; 51. Prestressed connecting rack block of second tower segment; 52. Upper tower segment; 53. Prestressed beam of upper tower structure; 6. Lower tower column structure; 61. Prestressed connecting rack block of second tower column segment; 62. Lower tower segment; 63. Prestressed beam of lower tower column structure; 7. Prestressed beam connecting segment. DETAILED DESCRIPTION

[0048] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively and carefully below in conjunction with the accompanying drawings and preferred embodiments of the specification, but the protection scope of the present invention is not limited to the following specific embodiments.

[0049] It should be noted that when an element is described as being "fixed, fixed, connected or connected to" another element, it can be directly fixed, fixed, connected or connected to the other element, or it can be indirectly fixed, fixed, connected or connected to the other element through other intermediate connectors.

[0050] Unless otherwise defined, all professional terms used below have the same meanings as those generally understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present utility model.

[0051] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0052] Embodiment 1:

[0053] like Figure 1-Figure 6 As shown, the conversion section structure of the UHPC wind power tower of this embodiment includes a UHPC tower connecting section 1, a UHPC tower column connecting section 2 and a UHPC connecting beam 3. The UHPC tower column connecting section 2 is fixed to the periphery of the UHPC tower connecting section 1 through the UHPC connecting beam 3; a plurality of upper tower structure prestressed anchoring racks 13 for prestressed anchoring of an upper tower structure 5 above the conversion section structure are arranged in the UHPC tower connecting section 1, and a lower tower column structure prestressed anchoring rack 21 for prestressed anchoring of a lower tower column structure 6 below the conversion section structure is arranged on the outer wall of the UHPC tower column connecting section 2; the number of the upper tower structure prestressed anchoring racks 13 is the same as that of the lower tower column structure 6; The number of webs of the UHPC connecting beam 3 matches and corresponds one to one (for example, in this embodiment, there are 6 of them), and the setting positions of all the upper tower structure prestressed anchor racks 13 in the UHPC tower connecting section 1 are located at the connection between the web of the UHPC connecting beam 3 and the UHPC tower connecting section 1. The setting position of the upper tower structure prestressed anchor rack 13 and the connection position of the web of the UHPC connecting beam 3 and the UHPC tower connecting section 1 are respectively located on the inner and outer surfaces of the same position of the side wall of the UHPC tower connecting section 1. The upper tower structure prestressed anchor rack 13 can be obtained by extending from the web of the UHPC connecting beam 3 into the UHPC tower connecting section 1.

[0054] like Figure 2 , Figure 6 As shown, in this embodiment, the anchoring position of the prestressed anchoring rack 13 of the upper tower structure is lower than the anchoring position of the prestressed anchoring rack 21 of the lower tower column structure.

[0055] like Figure 2 , Figure 4 As shown, in this embodiment, the UHPC tower connection section 1 is a hollow structure, and a first transverse diaphragm 11 and a second transverse diaphragm 12 are arranged in the UHPC tower connection section 1. The first transverse diaphragm 11 is provided with two upper and lower diaphragms, and the thickness of the diaphragms is 0.1-0.4m, and the outer diameter matches the inner diameter of the UHPC tower connection section 1. The upper first transverse diaphragm 11 is located at the top of the UHPC tower connection section 1, and the top surface position of the lower first transverse diaphragm 11 is kept flush with the upper top surface of the UHPC connection beam 3, and the bottom surface position of the second transverse diaphragm 12 is kept flush with the lower bottom surface of the UHPC connection beam 3. The centers of the upper and lower first transverse diaphragms 11 and the second transverse diaphragm 12 are hollowed out to form an elevator shaft passage.

[0056] like Figure 4 As shown, in this embodiment, the bottom of the prestressed anchor rack 13 of the upper tower structure is attached to the top surface of the second transverse partition 12, and the upper part of the prestressed anchor rack 13 of the upper tower structure is attached to the bottom surface of the first transverse partition 11 above, and the first transverse partition 11 and the second transverse partition 12 are provided with a plurality of first prestressed beam reserved channels 41 corresponding one to one with the prestressed anchor rack 13 of the upper tower structure, and the opening positions of the first prestressed beam reserved channels 41 match the prestressed anchor rack 13 of the upper tower structure; the prestressed anchor rack 13 of the upper tower structure is connected to the upper tower structure 5 through the prestressed beam 53 of the upper tower structure, and the prestressed beam 53 of the upper tower structure is arranged in the inner cavity of the upper tower structure 5, and the anchoring position of the prestressed beam 53 of the upper tower structure and the prestressed anchor rack 13 of the upper tower structure is located at the bottom of the second transverse partition 12.

[0057] like Figure 2 , Figure 5 , Figure 6 As shown, in this embodiment, the UHPC tower column connection section 2 and the UHPC connection beam 3 are both hollow structures, and a tower column vertical local stiffening rib 23 is provided in the UHPC tower column connection section 2. The setting position of the tower column vertical local stiffening rib 23 and the connection position of the web of the UHPC connection beam 3 and the UHPC tower column connection section 2 are respectively located on the inner and outer sides of the same position of the side wall of the UHPC tower column connection section 2. The tower column vertical local stiffening rib 23 can be extended from the web of the UHPC connection beam 3 to the inside of the UHPC tower column connection section 2. The lower tower column structure prestressed anchoring rack 21 is extended and arranged in the inner cavity of the UHPC tower column connecting section 2, and a second prestressed beam reserved channel 42 is arranged in the lower tower column structure prestressed anchoring rack 21. The lower tower column structure prestressed anchoring rack 21 is connected to the lower tower column structure 6 through the lower tower column structure prestressed beam 63. The anchoring position of the lower tower column structure prestressed beam 63 and the lower tower column structure prestressed anchoring rack 21 is located at 0.5-1m below the bottom surface of the top plate of the UHPC tower column connecting section 2.

[0058] like Figure 4 , Figure 6 , Figure 7As shown, in this embodiment, a plurality of first tower segment prestressed connection tooth blocks 14 for prestressed connection between the UHPC tower segment 1 and the upper tower segment 52 of the upper tower structure 5 are provided on the upper edge of the inner cavity of the UHPC tower connection section 1. The plurality of first tower segment prestressed connection tooth blocks 14 are attached between the upper and lower first transverse diaphragms 11 and are staggeredly distributed with the prestressed anchoring racks 13 of the upper tower structure. The upper and lower first transverse diaphragms 11 are provided with a plurality of third prestressed beam reserved holes 43 corresponding to the first tower segment prestressed connection tooth blocks 14 one by one. The third prestressed beam reserved holes The opening position of the channel 43 matches the first tower segment prestressed connection tooth block 14; a plurality of second tower segment prestressed connection tooth blocks 51 corresponding to the first tower segment prestressed connection tooth blocks 14 are provided at the lower edge of the inner cavity of the upper tower segment 52; the UHPC tower connection segment 1 and the upper tower segment 52 are anchored by the segment connection prestressed beam 7; the two ends of the segment connection prestressed beam 7 are respectively anchored on the first tower segment prestressed connection tooth block 14 and the second tower segment prestressed connection tooth block 51; the middle part passes through the side wall of the UHPC tower connection segment 1 and the upper tower segment 52.

[0059] like Figure 5 , Figure 6 , Figure 8 As shown, in this embodiment, a plurality of first tower column segment prestressed connection tooth blocks 22 for prestressed connection between the UHPC tower column connecting section 2 and the lower tower column segment 62 of the lower tower column structure 6 are provided in the inner cavity of the UHPC tower column connecting section 2, and the plurality of first tower column segment prestressed connection tooth blocks 22 are evenly distributed along the lower edge of the inner cavity of the UHPC tower column connecting section 2, and a plurality of second tower column segment prestressed connection tooth blocks 61 corresponding to the first tower column segment prestressed connection tooth blocks 22 are provided on the upper edge of the inner cavity of the lower tower column segment 62, and the UHPC tower column connecting section 2 and the lower tower column segment 62 are anchored by a segment connection prestressed beam 7, and the two ends of the segment connection prestressed beam 7 are respectively anchored on the first tower column segment prestressed connection tooth blocks 22 and the second tower column segment prestressed connection tooth blocks 61, and the middle part runs through the side walls of the UHPC tower column connecting section 2 and the lower tower column segment 62.

[0060] In this embodiment, the UHPC tower connection section 1 is a variable cross-section hollow cylindrical thin-walled structure with a wall thickness of 0.1-0.2m (any range, such as 0.1m, 0.2m, etc.), and the cross section of the UHPC tower connection section 1 gradually decreases from bottom to top, and the cross section is circular; the outer diameter of the cross section changes from 2.8-8.8m at the bottom to 2-8m at the top. At this time, the first transverse diaphragm 11 and the second transverse diaphragm 12 are annular. In other embodiments, the variable cross-section hollow cylindrical thin-walled structure can also be polygonal.

[0061] In this embodiment, the UHPC tower column connection section 2 is a hollow cylindrical thin-walled structure, and three UHPC tower column connection sections 2 are vertically arranged, which are evenly distributed around the vertical center line of the UHPC wind power tower, and the sizes of the three UHPC tower column connection sections 2 are consistent; the cross section of the UHPC tower column connection section 2 is circular, and the outer diameter of the cross section is 2-4m (any within the above range, such as 2m, 3m, 4m, etc.), the upper half of the cross section is a constant cross section with a wall thickness of 0.1-0.2m (any within the above range, such as 0.1m, 0.2m, etc.), and the lower half is a variable cross section with a wall thickness from 0.1-0.2m (any within the above range, such as 0.1m, 0.2m, etc.) from top to bottom. 0.2-0.4m (any within the above range, such as 0.2m, 0.3m, 0.4m, etc.). In other embodiments, the hollow cylindrical thin-walled structure can also be a polygon.

[0062] In this embodiment, the wall thickness of the UHPC connecting beam 3 is 0.1-0.4m (any within the above range, such as 0.1m, 0.2m, 0.3m, 0.4m, etc.), the cross section is rectangular, the cross-sectional width is 1-3m, and the cross-sectional height is variable, changing from 4-6m to 5-7m from bottom to top.

[0063] like Fig. 9 As shown, the UHPC wind tower of this embodiment includes an upper tower structure 5 and a lower tower column structure 6, the upper tower structure 5 includes an upper tower segment 52, the lower tower column structure 6 includes a lower tower segment 62, the upper tower structure 5 and the lower tower column structure 6 are connected by the above-mentioned conversion section structure, the upper tower structure 5 and the UHPC tower connection segment 1 are connected by tensioning a prestressed beam through the upper tower structure prestressed anchor rack 13, the lower tower column structure 6 and the UHPC tower connection segment 2 are connected by tensioning a prestressed beam through the lower tower column structure prestressed anchor rack 21, the top of the lower tower column segment 62 is connected to the bottom of the UHPC tower connection segment 2, and the bottom of the upper tower segment 52 is connected to the top of the UHPC tower connection segment 1.

[0064] The construction method of the UHPC wind power tower of this embodiment includes the following steps:

[0065] S1: prefabricate the conversion section structure, so that the UHPC tower connecting section 1, the UHPC tower column connecting section 2 and the UHPC connecting beam 3 are integrally cast and formed, and the upper tower structure prestressed anchor rack 13 and the lower tower column structure prestressed anchor rack 21 are prefabricated at the same time;

[0066] S2: construct the lower tower column structure 6, then hoist and install the conversion section structure to the top of the lower tower column segment 62 at the top of the lower tower column structure 6, so that the top of the lower tower column segment 62 is connected to the bottom of the UHPC tower column connecting section 2 by prestressing (through the first tower column segment prestressed connecting tooth block 22 and the second tower column segment prestressed connecting tooth block 61 using the segment connection prestressed beam 7 for anchoring), and complete the preliminary connection between the conversion section structure and the lower tower column structure 6;

[0067] S3: tensioning the prestressed beam (i.e., the upper tower structure prestressed beam 53) between the lower tower structure 6 and the UHPC tower connection section 2 through the lower tower structure prestressed anchor rack 21, so as to realize the prestressed connection between the lower tower structure 6 and the conversion section structure, so that the two are in a state of high compressive stress;

[0068] S4: hoist and install the upper tower segment 52 at the bottom layer of the upper tower structure 5 onto the transition section structure, so that the bottom of the upper tower segment 52 is connected to the UHPC tower connection segment 1 by prestressing (through the first tower segment prestressing connection tooth block 14 and the second tower segment prestressing connection tooth block 51 using the segment connection prestressing beam 7 for anchoring), complete the connection between the transition section structure and the upper tower segment 52, and then sequentially construct other upper tower segments 52 to complete the construction of the upper tower structure 5;

[0069] S5: The prestressed beam between the upper tower structure 5 and the UHPC tower connection section 1 (i.e., the prestressed beam 63 of the lower tower column structure) is tensioned through the prestressed anchoring rack 13 of the upper tower structure to achieve a prestressed connection between the upper tower structure 5 and the transition section structure, so that the two are in a state of high compressive stress.

[0070] Embodiment 2:

[0071] The conversion section structure of the UHPC wind power tower in this embodiment is basically the same as that in Embodiment 1, except that Fig.10 As shown, in this embodiment, there are four UHPC tower column connecting sections 2, which are vertically distributed around the vertical center line of the wind tower. The cross-section of a single UHPC tower column connecting section 2 adopts a hollow thin-walled circular cross-section, and the sizes of the four UHPC tower column connecting sections 2 are consistent.

Claims

1. A conversion section structure of a UHPC wind power tower, characterized in that: It comprises a UHPC tower connection section (1), a UHPC tower column connection section (2) and a UHPC connection beam (3), wherein the UHPC tower column connection section (2) is fixedly arranged on the periphery of the UHPC tower connection section (1) via the UHPC connection beam (3); The UHPC tower connection section (1) is provided with a plurality of upper tower structure prestressed anchoring racks (13) for prestressed anchoring of an upper tower structure (5) above the conversion section structure, and the UHPC tower column connection section (2) is provided with lower tower column structure prestressed anchoring racks (21) for prestressed anchoring of a lower tower column structure (6) below the conversion section structure; The location where one or more of the upper tower structure prestressed anchor racks (13) are arranged in the UHPC tower connection section (1) is located at the connection between the web of the UHPC connection beam (3) and the UHPC tower connection section (1).

2. The conversion section structure of the UHPC wind power tower according to claim 1 is characterized in that: The anchoring position of the prestressed anchoring rack (13) of the upper tower structure is lower than the anchoring position of the prestressed anchoring rack (21) of the lower tower column structure.

3. The conversion section structure of the UHPC wind power tower according to claim 1, characterized in that: The UHPC tower connection section (1) is a hollow structure. A first transverse diaphragm (11) and a second transverse diaphragm (12) are provided in the UHPC tower connection section (1). The first transverse diaphragm (11) is provided with two upper and lower sections. The upper first transverse diaphragm (11) is located at the top of the UHPC tower connection section (1). The top surface of the lower first transverse diaphragm (11) is kept flush with the upper top surface of the UHPC connection beam (3). The bottom surface of the second transverse diaphragm (12) is kept flush with the lower bottom surface of the UHPC connection beam (3).

4. The conversion section structure of the UHPC wind power tower according to claim 3 is characterized in that: The bottom of the upper tower structure prestressed anchor rack (13) is attached to the top surface of the second transverse diaphragm (12), and the upper part of the upper tower structure prestressed anchor rack (13) is attached to the bottom surface of the first transverse diaphragm (11) above. The first transverse diaphragm (11) and the second transverse diaphragm (12) are provided with a plurality of first prestressed beam reserved holes (41) corresponding to the upper tower structure prestressed anchor rack (13) one by one. The opening of the first prestressed beam reserved holes (41) The upper tower structure prestressed anchor rack (13) is arranged at a position matching that of the upper tower structure prestressed anchor rack (13); the upper tower structure prestressed anchor rack (13) is connected to the upper tower structure (5) via an upper tower structure prestressed beam (53); the upper tower structure prestressed beam (53) is arranged in the inner cavity of the upper tower structure (5); and the anchoring position of the upper tower structure prestressed beam (53) and the upper tower structure prestressed anchor rack (13) is located at the bottom of the second transverse diaphragm (12).

5. The conversion section structure of the UHPC wind power tower according to claim 1, characterized in that: The UHPC tower column connection section (2) and the UHPC connection beam (3) are both hollow structures. A tower column vertical local stiffening rib (23) is provided in the UHPC tower column connection section (2). The location of the tower column vertical local stiffening rib (23) and the connection location of the web of the UHPC connection beam (3) and the UHPC tower column connection section (2) are respectively located on the inner and outer surfaces of the same position of the side wall of the UHPC tower column connection section (2).

6. The conversion section structure of the UHPC wind power tower according to claim 1, characterized in that: The lower tower column structure prestressed anchoring rack (21) is arranged in the inner cavity of the UHPC tower column connecting section (2); the lower tower column structure prestressed anchoring rack (21) is connected to the lower tower column structure (6) via a lower tower column structure prestressed beam (63); the anchoring position of the lower tower column structure prestressed beam (63) and the lower tower column structure prestressed anchoring rack (21) is located 0.5-1m below the bottom surface of the top plate of the UHPC tower column connecting section (2).

7. The conversion section structure of the UHPC wind power tower according to claim 3, characterized in that: The upper edge of the inner cavity of the UHPC tower connecting section (1) is provided with a plurality of first tower segment prestressed connection tooth blocks (14) for prestressed connection between the UHPC tower connecting section (1) and the upper tower segment (52) of the upper tower structure (5); the plurality of first tower segment prestressed connection tooth blocks (14) are arranged between the upper and lower first transverse diaphragms (11) and are staggeredly distributed with the upper tower structure prestressed anchoring racks (13); the upper and lower first transverse diaphragms (11) are provided with a plurality of third prestressed beam reserved holes (43) corresponding one-to-one to the first tower segment prestressed connection tooth blocks (14); the third prestressed beam reserved holes (43) are provided with a plurality of third prestressed beam reserved holes (43); The opening position matches the first tower segment prestressed connection tooth block (14); a plurality of second tower segment prestressed connection tooth blocks (51) corresponding to the first tower segment prestressed connection tooth blocks (14) are provided at the lower edge of the inner cavity of the upper tower segment (52); the UHPC tower connection section (1) and the upper tower segment (52) are anchored by a segment connection prestressed beam (7); the two ends of the segment connection prestressed beam (7) are respectively anchored on the first tower segment prestressed connection tooth block (14) and the second tower segment prestressed connection tooth block (51); and the middle portion passes through the side walls of the UHPC tower connection section (1) and the upper tower segment (52).

8. The conversion section structure of the UHPC wind power tower according to claim 1, characterized in that: The inner cavity of the UHPC tower column connecting section (2) is provided with a plurality of first tower column segment prestressed connection tooth blocks (22) for prestressed connection between the UHPC tower column connecting section (2) and the lower tower column segment (62) of the lower tower column structure (6); the plurality of first tower column segment prestressed connection tooth blocks (22) are evenly distributed along the lower edge of the inner cavity of the UHPC tower column connecting section (2); the upper edge of the inner cavity of the lower tower column segment (62) is provided with a plurality of first tower column segment prestressed connection tooth blocks (22) a one-to-one corresponding second tower column segment prestressed connection tooth block (61), the UHPC tower column connection segment (2) and the lower tower column segment (62) are anchored by a segment connection prestressed beam (7), the two ends of the segment connection prestressed beam (7) are respectively anchored on the first tower column segment prestressed connection tooth block (22) and the second tower column segment prestressed connection tooth block (61), and the middle part passes through the side walls of the UHPC tower column connection segment (2) and the lower tower column segment (62).

9. The conversion section structure of a UHPC wind power tower according to any one of claims 1 to 8, characterized in that: The UHPC tower connection section (1) is a hollow thin-walled structure with a variable cross-section, and the wall thickness is 0.1-0.2 m. The cross-section of the UHPC tower connection section (1) gradually decreases from bottom to top, and the cross-section is circular or polygonal. The UHPC tower column connecting section (2) is a hollow thin-walled structure. A plurality of UHPC tower column connecting sections (2) are vertically arranged and evenly distributed around the vertical center line of the UHPC wind power tower. The cross section of the UHPC tower column connecting section (2) is circular or polygonal, the outer diameter of the cross section is 2-4 m, the upper half of the cross section is a constant cross section with a wall thickness of 0.1-0.2 m, and the lower half is a variable cross section with a wall thickness changing from 0.1-0.2 m to 0.2-0.4 m from top to bottom; The UHPC connecting beam (3) is a hollow thin-walled structure with a wall thickness of 0.1-0.4 m and a rectangular cross section.

10. A UHPC wind power tower, comprising an upper tower structure (5) and a lower tower column structure (6), characterized in that: The upper tower structure (5) includes an upper tower segment (52), and the lower tower column structure (6) includes a lower tower column segment (62). The upper tower structure (5) and the lower tower column structure (6) are connected by a conversion section structure according to any one of claims 1 to 9. The upper tower structure (5) and the UHPC tower connection segment (1) are connected by a prestressed beam tensioned by an upper tower structure prestressed anchor rack (13). The lower tower column structure (6) and the UHPC tower connection segment (2) are connected by a prestressed beam tensioned by a lower tower column structure prestressed anchor rack (21). The top of the lower tower column segment (62) is connected to the bottom of the UHPC tower connection segment (2), and the bottom of the upper tower segment (52) is connected to the top of the UHPC tower connection segment (1).

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