Triangular support type steel rib-concrete filled steel tube truss tower

Abstract

The invention discloses a triangular support type steel rib-steel tube concrete truss tower which comprises a fan, a steel tower section, a switching section, a truss section and an independent foundation, the independent foundation is fixed to the ground through foundation bolts, the truss section is arranged on the independent foundation and is a triangular support truss type tower, and a supporting assembly is arranged in the independent foundation. According to the invention, the triangular support is adopted, so that the torsional property of the structure is better; the corner columns are made of steel pipe-steel reinforced concrete, so that the rigidity is increased, and meanwhile, the steel consumption is reduced; the independent foundation reduces land occupation area and saves land acquisition cost; steel ribs are added into the steel pipes and concrete is poured, the inner and outer steel pipes can be used as construction formworks, and the concrete surface quality problem in the demolding process is avoided; the stability and the tensile property of the structure are improved through double prestress tensioning, and meanwhile it is guaranteed that concrete cannot crack; truss section members are all produced in factories, and spare parts are transported to the site for installation, so that the construction efficiency is remarkably improved, and the construction quality is ensured.

Description

Technical Field

[0001] The invention mainly relates to the technical field of truss towers, and in particular to a triangular support type steel frame-steel tube concrete truss tower. Background Art

[0002] Wind power energy is a pollution-free, renewable clean energy. Wind power generation is a new type of energy. It is driven by a tower supporting the rotation of wind blades to drive the generator to generate electricity. The tower is an indispensable structure. In recent years, the size of wind turbines has become larger and larger, and the required tower height and diameter have also become larger and larger. At present, in low wind speed areas, towers are mainly divided into segmented pure steel towers, steel-concrete composite towers, and truss towers.

[0003] In order to prevent tower resonance and increase rigidity, the sliced ​​pure steel tower requires a tower diameter. However, increasing the diameter will lead to an increase in the thickness of the steel plate, and the amount of steel used will increase proportionally, which will increase the production cost. Steel-concrete towers are easy to obtain materials, and have low processing and production costs compared to pure steel towers. They are also prefabricated in factories and transported to the site, which makes transportation convenient. However, the cost of concrete molds is high, and the quality control of the concrete production process is difficult, there are many quality problems, and the safety of the tower remains to be tested. Truss towers are currently rarely used in practice. The main reason is that the existing truss towers occupy a large area, have a large number of bolts, a large workload for operation and maintenance, use a square support design, use a large amount of steel, and have poor torsional performance. Summary of the invention

[0004] The technical solution of the present invention aims at the technical problem that the existing technical solutions are too single, and provides a solution that is significantly different from the existing technology. It mainly provides a triangular support steel frame-steel tube concrete truss tower to solve the technical problems raised in the above background technology that the existing truss tower has a large footprint, a large number of bolts, a large workload for operation and maintenance, adopts a square support design, uses a large amount of steel, and has poor torsional resistance.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: A triangular supported steel frame-steel tube concrete truss tower comprises a fan, a steel tower section, a transition section, a truss section and an independent foundation. The independent foundation is fixed to the ground by anchor bolts. The truss section is arranged on the independent foundation. The truss section is arranged as a triangular supported truss tower. A support assembly for supporting and fixing the truss section columns is arranged inside the independent foundation.

[0006] Preferably, three columns are provided on the truss section, the columns form an acute angle with the ground, and the columns are connected to anchor bolts via flanges.

[0007] Preferably, the anchor bolts are composed of nuts, backing plates, washers, and bolts, and the anchor bolts are connected to the steel mesh, the ring plate, and the reinforcing ribs, and the steel mesh, the ring plate, and the reinforcing ribs are pre-buried in the ground.

[0008] Preferably, overall prestressed tendons are arranged inside the column, and the overall prestressed tendons are inserted into the independent foundation, and the independent foundation is provided with a lower end anchor and a shear key.

[0009] Preferably, the support assembly comprises a support member, the support member is arranged on the overall prestressed tendon, and a fixing member for fixing the support member on the overall prestressed tendon is provided on the support member.

[0010] Preferably, the support assembly further comprises a connecting member, wherein the connecting member is arranged on the anchor bolt, and the connecting member is provided with a reinforcing member for fixing the connecting member on the anchor bolt.

[0011] Preferably, a pull rod is provided on the connecting member located on the inclined back side of the overall prestressed tendon, and one end of the pull rod away from the connecting member is connected to the support member in an inclined downward direction.

[0012] Preferably, a support rod is provided on the connecting piece located on the inclined front side of the overall prestressed tendon, and a conical support block is provided on one end of the support rod away from the connecting piece, and the support block passes through the support piece and is pressed against the overall prestressed tendon.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the truss tower includes a transition section, a truss section and an independent foundation. The truss tower itself has high rigidity, which can effectively avoid the overall resonance problem of the tower after the tower height is increased; the triangular support is adopted, the structural torsion resistance is better, and while ensuring the structural stability, the steel consumption is lower than that of the square support; the corner column adopts steel pipe-steel concrete, which increases the rigidity while reducing the steel consumption; the independent foundation reduces the land occupation area and saves land acquisition costs; steel frame is added to the inside of the steel pipe and concrete is poured, and the inner and outer steel pipes can also serve as construction templates to avoid concrete surface quality problems during demoulding; double prestressing increases the stability and tensile performance of the structure, while ensuring that the concrete will not crack; the truss section components are all produced in the factory, and the loose parts are transported to the site for installation, which significantly improves the construction efficiency and ensures the construction quality.

[0014] A support assembly is arranged inside the independent foundation, the overall prestressed tendons inside the column are inserted into the independent foundation, and a circle of anchor bolts are arranged in a circle inside the independent foundation. The support rods and support blocks in front of the inclined surface of the overall prestressed tendons are tilted upward and pressed on the overall prestressed tendons, while the pull rods on the back of the overall prestressed tendons are tilted downward and connected to the support members. The support members can not only support the overall prestressed tendons, but also fix and hold the conical support blocks. Due to the inclined setting of the overall prestressed tendons, the anchor bolts below the inclined surface are under greater pressure. However, the tension is provided by the anchor bolts above, so that the pressure generated by the overall prestressed tendons can be more evenly distributed. The steel mesh sleeved on the outside of the anchor bolts and the poured cement ensure that the pillars have sufficient supporting force. In this way, even if three legs are set instead of the original four-legged pillars, the truss section can maintain sufficient supporting force and stability.

[0015] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the top view of the independent foundation structure of the present invention; Figure 3 for Figure 2 A1-A1 direction cross-sectional structure diagram; Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure in the B1-B1 direction; Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure in the B2-B2 direction; Figure 6 This is a schematic diagram of the front structure of the anchor bolt in the present invention; The markings in the figure are: 1. Fan; 2. Steel tower section; 3. Transfer section; 4. Truss section; 41. Column; 411. Flange; 5. Independent foundation; 6. Anchor bolt; 61. Nut; 62. Pad; 63. Washer; 64. Bolt; 7. Steel mesh; 8. Ring plate; 9. Reinforced rib; 10. Overall prestressed tendons; 11. Lower end anchor; 12. Shear key; 13. Support member; 14. Fixing member; 15. Connecting member; 16. Reinforcement member; 17. Pull rod; 18. Support rod; 19. Support block. DETAILED DESCRIPTION

[0017] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0018] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly connected by technicians in the technical field to which the present invention belongs. The terminology used in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0020] Please refer to the attached Figure 1-Figure 6 A triangular supported steel frame-steel tube concrete truss tower comprises a wind turbine 1, a steel tower section 2, a transition section 3, a truss section 4, and an independent foundation 5. The independent foundation 5 is fixed to the ground by anchor bolts 6. The truss section 4 is arranged on the independent foundation 5. The truss section 4 is arranged as a triangular supported truss tower. A supporting assembly for supporting and fixing the columns 41 of the truss section 4 is arranged inside the independent foundation 5.

[0021] The specific operation process of the present invention is as follows: the truss section 4 is provided with three columns 41 supported in a triangular shape on an independent foundation 5 on the ground. The independent foundation 5 fixes the columns 41 through anchor bolts 6. The anchor bolts 6 are arranged in a circular array inside the independent foundation 5, and the columns 41 are supported by support components. Due to the triangular arrangement of the columns 41, the columns 41 will be inclined, and the support components will disperse the pressure of the inclined columns 41 more evenly on the annular anchor bolts 6.

[0022] Please refer to Figure 1-Figure 3 Three columns 41 are provided on the truss section 4 . The columns 41 form an acute angle with the ground. The columns 41 are connected to the anchor bolts 6 via flanges 411 .

[0023] The flange 411 in the column 41 in the truss section 4 is connected to the anchor bolt 6. The truss section 4 is designed as a triangular support truss tower. The three columns 41 form an acute angle with the ground. The two ends are respectively connected to the independent foundation 5 and the transition section 3. The steel tower section 2 is set above the transition section 3, and the fan 1 is set above the steel tower section 2.

[0024] Please refer to Figure 6 The anchor bolt 6 is composed of a nut 61, a pad 62, a gasket 63, and a bolt 64. The anchor bolt 6 is connected to a steel mesh 7, a ring plate 8, and a reinforcing rib 9, and the steel mesh 7, the ring plate 8, and the reinforcing rib 9 are pre-buried in the ground.

[0025] The anchor bolt 6 is composed of two nuts 61, a pad 62, a gasket 63, and a bolt 64. The embedded ring plate 8, the embedded reinforcing ribs 9 and the steel mesh 7 are embedded in advance. The thickness of the embedded ring plate 8 is 60mm to 80mm, the thickness of the reinforcing ribs 9 is 10mm to 20mm, and the steel mesh 7 is sleeved on the outside of the anchor bolt 6 in a circular array. The steel mesh 7 is tightened inward to provide support for the anchor bolt 6.

[0026] Please refer to Figure 3 The column 41 is provided with an overall prestressed tendon 10 , and the overall prestressed tendon 10 is inserted into the independent foundation 5 , and the independent foundation 5 is provided with a lower end anchor 11 and a shear key 12 .

[0027] The overall prestressed tendons 10 are made of high-strength steel strands, and the overall tensioning length is 85m-105m. The overall prestressed tendons 10 are applied to reduce the tension on the columns 41 and the flanges 411, and the overall prestressed tendons 10 are also the main supporting structure of the columns 41. The side of the flange 411 that contacts the independent foundation 5 is evenly distributed with shear keys 12 in the circumferential direction. The shear keys 12, the bottom end of the overall prestressed tendons 10 and the overall prestressed lower end anchor 11 are buried in the independent foundation 5.

[0028] Please refer to Figure 3 and Figure 4 The support assembly includes a support member 13, which is arranged on the overall prestressed tendon 10, and a fixing member 14 for fixing the support member 13 on the overall prestressed tendon 10 is arranged on the support member 13. The support assembly also includes a connecting member 15, which is arranged on the anchor bolt 6, and a reinforcing member 16 for fixing the connecting member 15 on the anchor bolt 6 is arranged on the connecting member 15. A pull rod 17 is arranged on the connecting member 15 on the inclined back side of the overall prestressed tendon 10, and the end of the pull rod 17 away from the connecting member 15 is connected to the support member 13 in an inclined downward direction. A support rod 18 is arranged on the connecting member 15 on the inclined front side of the overall prestressed tendon 10, and a conical support block 19 is arranged on the end of the support rod 18 away from the connecting member 15. The support block 19 passes through the support member 13 and is pressed on the overall prestressed tendon 10.

[0029] The anchor bolts 6 are arranged in a circular array inside the independent foundation 5, but the overall prestressed tendon 10 is inclined. Therefore, the anchor bolts 6 on the front side of the inclined surface of the overall prestressed tendon 10 will be subjected to greater pressure, while the anchor bolts 6 on the back side of the overall prestressed tendon 10 will be subjected to less pressure. A support member 13 is sleeved on the overall prestressed tendon 10, and the support member 13 is fixed to the overall prestressed tendon 10 by a fixing member 14. The anchor bolts 6 on the front side of the inclined surface of the overall prestressed tendon 10 are provided with a support rod 18 and a conical support block 19, and the support rod 18 is inclined upward, and the more the anchor bolt 6 on the front side of the inclined surface of the overall prestressed tendon 10 is located, the greater the inclination angle of the support rod 18 is. The support block 19 on the support rod 18 passes through the support member 13 and is pressed against the overall prestressed tendon 10, and a slot hole adapted to the support block 19 is opened on the support member 13. The support member 13 will provide support force and tension to the support block 19. 8 and the support block 19 mainly play the role of supporting the overall prestressed tendon 10 and providing supporting force for the overall prestressed tendon 10. The anchor bolts 6 on the back side of the inclined surface of the overall prestressed tendon 10 cannot be directly acted on by the pressure of the overall prestressed tendon 10. Therefore, these anchor bolts 6 are provided with downward inclined pull rods 17 connected to the support members 13. The pull rods 17 are used to provide tension to the support members 13. The support members 13 can provide tension to the overall prestressed tendon 10 and the support blocks 19. In this way, the anchor bolts 6 on the back side of the inclined surface of the overall prestressed tendon 10 can share the pressure borne by the anchor bolts 6 on the front side of the inclined surface of the overall prestressed tendon 10. In this way, the pressure borne by the anchor bolts 6 arranged in a circular array is more uniform; the connecting member 15 arranged on the anchor bolt 6 is fixed to the anchor bolt 6 by the reinforcing member 16, and the reinforcing member 16 can also provide a certain strength for the anchor bolt 6 and the connecting member 15 to support.

[0030] The above is an exemplary description of the present invention in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A triangular support type steel frame-concrete-filled steel tube truss tower, comprising a fan (1), a steel tower section (2), a transition section (3), a truss section (4), and an independent foundation (5), characterized in that: The independent foundation (5) is fixed to the ground by anchor bolts (6); the truss section (4) is arranged on the independent foundation (5); the truss section (4) is arranged as a triangular support truss tower; a support assembly for supporting and fixing the truss section (4) columns (41) is arranged inside the independent foundation (5).

2. A triangular support type steel frame-concrete-filled steel tube truss tower according to claim 1, characterized in that: Three columns (41) are arranged on the truss section (4), the columns (41) form an acute angle with the ground, and the columns (41) are connected to anchor bolts (6) via flanges (411).

3. A triangular support type steel frame-concrete-filled steel tube truss tower according to claim 2, characterized in that: The anchor bolt (6) is composed of a nut (61), a pad (62), a gasket (63), and a bolt (64); the anchor bolt (6) is connected to a steel mesh (7), a ring plate (8), and a reinforcing rib (9); and the steel mesh (7), the ring plate (8), and the reinforcing rib (9) are pre-buried in the ground.

4. The triangular support type steel frame-concrete filled steel tube truss tower according to claim 1, characterized in that: An overall prestressed tendon (10) is arranged inside the column (41), and the overall prestressed tendon (10) is inserted into the independent foundation (5), and a lower end anchor (11) and a shear key (12) are arranged on the independent foundation (5).

5. The triangular support type steel frame-concrete filled steel tube truss tower according to claim 4, characterized in that: The support assembly comprises a support member (13), wherein the support member (13) is arranged on the overall prestressed tendon (10), and a fixing member (14) for fixing the support member (13) on the overall prestressed tendon (10) is arranged on the support member (13).

6. The triangular support type steel frame-concrete filled steel tube truss tower according to claim 5, characterized in that: The support assembly further comprises a connecting member (15), wherein the connecting member (15) is arranged on the anchor bolt (6), and the connecting member (15) is provided with a reinforcing member (16) for fixing the connecting member (15) on the anchor bolt (6).

7. The triangular support type steel frame-concrete filled steel tube truss tower according to claim 6, characterized in that: A pull rod (17) is provided on the connecting piece (15) located on the inclined back side of the overall prestressed tendon (10); one end of the pull rod (17) away from the connecting piece (15) is connected to the support piece (13) in an inclined manner downward.

8. The triangular support type steel frame-concrete filled steel tube truss tower according to claim 7, characterized in that: A support rod (18) is provided on the connecting piece (15) located on the inclined front side of the overall prestressed tendon (10), and a conical support block (19) is provided on one end of the support rod (18) away from the connecting piece (15), and the support block (19) passes through the supporting piece (13) and is supported on the overall prestressed tendon (10).

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