CN111794914A - A prefabricated hybrid wind power tower based on edge steel plates restraining concrete slabs - Google Patents

Abstract

The invention discloses an assembled hybrid wind power tower cylinder based on edge steel plates for restraining concrete slabs, and relates to the technical field of wind power generation. The system consists of an upper pure steel tower cylinder and a lower concrete tower cylinder, wherein the concrete tower cylinder is formed by connecting 6 edge steel plates to restrain a concrete slab along the circumferential direction to form a hexagonal cylinder and assembling the hexagonal cylinder along the vertical section. The edge steel plate constraint concrete slab is characterized in that reinforcing mesh sheets are arranged on the inner side and the outer side of the edge steel plate constraint concrete slab, transverse tie bars are arranged on the inner side and the outer side of the edge steel plate constraint concrete slab, concrete constraint areas are formed by the inner steel plate, the outer steel plate and end plates on the two side edges, studs are arranged on the inner steel plate and the outer steel plate to enhance bonding with concrete, and then the concrete is poured to. The edge steel plate restrains the concrete plate end plate to extend inwards to form an ear plate, and bolt holes are reserved so as to be assembled through bolt connection. The system overcomes the defects of complex processing and assembling of the traditional concrete tower barrel component, has excellent mechanical property, simple component processing, convenient transportation, short construction period and high comprehensive benefit, and has wide engineering application prospect.

Description

A prefabricated hybrid wind power tower based on edge steel plates restraining concrete slabs

technical field

The present invention relates to the technical field of wind power generation.

Background technique

As a clean and renewable energy, wind energy has been rapidly developed and utilized in recent years. my country's wind energy reserves are very rich, but the regional distribution of wind energy resources is uneven. At present, wind power development is mainly concentrated in the "Three Norths" high wind speed areas, but the local power grid has limited capacity to absorb, resulting in the problem of "abandoning wind and limiting electricity". In order to develop wind power resources in low wind speed areas in the central, eastern and southern parts of my country, high-power, high-tower wind turbines have become a development trend.

In order to meet the stress requirements of the high tower and improve the stability, bearing capacity and fatigue resistance of the tower structure, a mixed tower with a pure steel tower in the upper part and a concrete tower in the lower part is used. However, the construction of the prefabricated components of the traditional concrete tower is complicated, the joints require on-site grouting maintenance, the connection construction is complicated, and the installation period is long.

Therefore, the development of a hybrid wind tower with good stability, high bearing capacity, good fatigue resistance, simple construction of prefabricated components, convenient on-site connection and short construction period is of great significance and broadness for promoting the development of wind energy resources in low wind speed areas. engineering application prospects.

SUMMARY OF THE INVENTION

The invention proposes a prefabricated hybrid wind power tower based on edge steel plates constraining concrete slabs: the system consists of an upper pure steel tower and a lower concrete tower. The concrete tower is made up of 6 edge steel plates constraining the concrete slabs in the circumferential direction to form a hexagonal cylinder and assembled in sections along the vertical direction.

The edge steel plate confines the concrete slab inside and outside with reinforced mesh and horizontal tie reinforcement. The edges on both sides are formed by the inner and outer steel plates and end plates to form a concrete constraint area. The inner and outer steel plates are provided with studs to enhance the bond with the concrete, and then the concrete is poured to form a concrete confinement area. overall. The edge steel plates constrain the end plates of the concrete slab to protrude inward to form lugs, and reserve bolt holes for assembling by bolting. The edge steel plate confines the bellows inside the concrete slab. After the tower is assembled, the prestressed tendons in the body are stretched in the bellows. One end is anchored to the bottom flange plate of the pure steel tower, and the other end is anchored in the tower foundation.

The system solves the shortcomings of complex processing and assembly of traditional concrete tower prefabricated components, and can realize full-fabricated construction of factory prefabrication and on-site assembly, with superior mechanical properties, convenient transportation of prefabricated components, short construction period, high comprehensive benefits, and broad engineering application prospects.

The technical scheme of the present invention is as follows:

A prefabricated hybrid wind power tower based on edge steel plate restraining concrete slab, the system includes pure steel tower, concrete tower, edge steel plate restraining concrete slab, outer steel plate, inner steel plate, end plate, stud, concrete, pre-embedded Steel pipes, bolts, prestressed bars, corrugated pipes, vertical bars, horizontal bars, tie bars, anchors, flange plates.

The system consists of an upper pure steel tower and a lower concrete tower. The lower welded flange plate of the pure steel tower is connected with the concrete tower by bolts, and the prestressed tendons are anchored on the pure steel tower flange to make it It is closely connected with the concrete tower. This structural connection method can save the transfer ring device in the traditional mixing tower. The internal force of the upper pure steel tower can be directly transferred to the lower concrete tower, making the force transmission path more direct and stress-bearing. more reasonable.

The concrete tower is constrained by 6 edge steel plates in the circumferential direction to form a hexagonal cylinder, which is assembled by bolts, and assembled in sections along the vertical direction. The edge steel plates are prefabricated in the factory and fully assembled on site. Construction, short construction period and convenient transportation.

Reinforcing steel meshes composed of vertical and horizontal steel bars are arranged on the inner and outer sides of the edge steel plate to constrain the concrete slab, and horizontal tie steel bars are arranged; the inner steel plate, outer steel plate and end plate are welded to form a confinement area for the concrete, and the inner steel plate is welded Bolts are set with the outer steel plate to strengthen the bond with the concrete; the end plate protrudes inward to form a lug plate, and bolt holes are reserved for assembling through bolt connection; the edge steel plate is pre-embedded at the inner third point of the concrete plate Two corrugated pipes are used to arrange the prestressed tendons in the body later; pre-embedded steel pipes are set in the edge steel plate-constrained concrete slab for hoisting during on-site construction; and then the concrete is poured to form a whole.

After the on-site assembly of the tower is completed, the prestressed tendons in the body are stretched in the bellows embedded in the concrete tower, one end is anchored on the flange plate at the bottom of the pure steel tower, and the other end is anchored in the tower foundation. The prestressed tendons in the body make the concrete tower in a state of full-section compression, which increases the integrity of the concrete tower, and at the same time, the prestressed tendons are arranged in the body to alleviate the corrosion of the prestressed tendons.

The present invention has the following beneficial effects with respect to the prior art:

(1) The steel tower and the concrete tower are directly connected by bolts and prestressed tendons, eliminating the need for the transfer ring of the traditional mixed tower, the force transmission path is clear, and the force bearing method is reasonable.

(2) The concrete tower is made of edge steel plate restrained concrete slabs connected by bolts, which solves the shortcomings of traditional concrete tower joints, such as on-site grouting maintenance and complicated connection construction.

(3) Steel plate-constrained concrete is used on both sides of the edge steel plate-constrained concrete slab, which can improve the bearing capacity and stability of the concrete slab, and has the advantages of high bearing capacity, good stability, material saving, and low cost; the edge steel plate-constrained concrete slab is a flat plate , Compared with the traditional concrete tower, the construction of steel bar binding and prefabricated formwork is convenient.

(4) The system can realize factory prefabrication of components and fully assembled construction on site, which is convenient for construction and can greatly shorten the construction period.

Description of drawings

Fig. 1 is the overall schematic diagram of the present invention;

Fig. 2 is the concrete tower cylinder section of the present invention and its connection mode schematic diagram;

Fig. 3 is the overall schematic diagram of the edge steel plate restraint concrete slab of the present invention and its detailed structure;

Fig. 4 is the connection schematic diagram of concrete tower of the present invention and pure steel tower;

In the picture: 1-pure steel tower, 2-concrete tower, 3-edge steel plate restrained concrete slab, 4-outer steel plate, 5-inner steel plate, 6-end plate, 7-bolt, 8-concrete, 9- Embedded steel pipe, 10-bolt, 11-prestressed tendon, 12-corrugated pipe, 13-vertical steel bar, 14-horizontal steel bar, 15-tie steel bar, 16-anchorage, 17-flange plate

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Fig. 1, a prefabricated hybrid wind power tower based on edge steel plates restraining concrete slabs, the system consists of an upper pure steel tower (1) and a lower concrete tower (2).

As shown in Figure 2, the concrete tower (2) is constrained by 6 edge steel plates along the circumferential direction of the concrete slabs (3) using bolts (10) to connect and assemble to form a hexagonal cylinder, which is assembled in sections along the vertical direction.

As shown in Fig. 3, reinforcement meshes composed of vertical reinforcement bars (13) and horizontal reinforcement bars (14) are arranged on the inner and outer sides of the edge steel plate-constrained concrete slab (3), and transverse tie reinforcement bars (15) are arranged; The inner steel plate (5), the outer steel plate (4) and the end plate (6) are welded to form a restraint area for the concrete (8). The inner steel plate (5) and the outer steel plate (4) are provided with studs (7) to strengthen the connection with the concrete. Bonding; the end plate (6) protrudes inward to form a lug plate, and bolt holes are reserved for assembly through bolt connection; two corrugated pipes ( 12), in order to arrange the prestressed tendons (11) in the body later; set the embedded steel pipe (9) in the edge steel plate-constrained concrete slab for hoisting during on-site construction; then pour the concrete (8) to form a whole, and complete the edge steel plate in the factory Prefabrication of the restrained concrete slab (3).

As shown in Figure 4, a flange plate (17) is welded to the lower part of the pure steel tower (1), and is connected to the concrete tower (2) by bolts (10). A prestressed rib (11) is stretched in the pipe (12), one end of the prestressed rib (11) is anchored on the bottom flange plate (17) of the pure steel tower (1), and the other end is anchored in the tower foundation.

The invention proposes a prefabricated hybrid wind power tower based on edge steel plates constraining concrete slabs. The system solves the shortcomings of complex processing and assembly of traditional concrete tower prefabricated components, and can realize fully prefabricated construction in factory and assembled on site. , superior mechanical properties, convenient transportation of prefabricated components, short construction period, high comprehensive benefits, and broad engineering application prospects.

The above descriptions are only preferred embodiments of the present invention, but the present invention is not limited to the specific embodiments described above. Without departing from the principle of the present invention, a person of ordinary skill in the art can also make some modifications, additions or use similar methods instead, which should also be regarded as the protection scope of the present invention.

Although this article uses more: 1-pure steel tower, 2-concrete tower, 3-edge steel plate restrained concrete slab, 4-outer steel plate, 5-inner steel plate, 6-end plate, 7-bolt, 8 -Concrete, 9-Embedded steel pipe, 10-Bolt, 11-Prestressed tendon, 12-Corrugated pipe, 13-Vertical steel bar, 14-Horizontal steel bar, 15-Tie bar, 16-Anchor, 17-Flange board, etc., but does not exclude the possibility of using other terms. These terms are only used to more conveniently describe and explain the essence of the present invention, and it is contrary to the spirit of the present invention to interpret them as any kind of additional limitation.

Claims (4)

1. The utility model provides an assembled hybrid wind power tower section of thick bamboo based on marginal steel sheet restraint concrete slab, relates to wind power generation technical field, characterized by: the system comprises a pure steel tower cylinder (1), a concrete tower cylinder (2), an edge steel plate constraint concrete plate (3), an outer steel plate (4), an inner steel plate (5), an end plate (6), a stud (7), concrete (8), a pre-buried steel pipe (9), a bolt (10), a prestressed rib (11), a corrugated pipe (12), a vertical steel bar (13), a horizontal steel bar (14), a tie steel bar (15), an anchorage device (16) and a flange plate (17); the upper part of the system is a pure steel tower cylinder (1), and the lower part is a concrete tower cylinder (2).

2. The fabricated hybrid wind tower based on edge steel plate-bound concrete slabs of claim 1, wherein: the concrete tower barrel (2) is formed by connecting and assembling 6 edge steel plates to restrain the concrete plates (3) along the circumferential direction by bolts (10) to form a hexagonal barrel and assembling the hexagonal barrel along the vertical direction in a segmented manner.

3. The fabricated hybrid wind tower based on edge steel plate-bound concrete slabs of claim 1, wherein: reinforcing steel bar meshes consisting of vertical reinforcing steel bars (13) and horizontal reinforcing steel bars (14) are arranged on the inner side and the outer side of the edge steel plate constraint concrete plate (3), and transverse tie reinforcing steel bars (15) are arranged; the two sides of the concrete are welded by an inner steel plate (5), an outer steel plate (4) and an end plate (6) to form a constraint area for concrete (8), and the inner steel plate (5) and the outer steel plate (4) are provided with studs (7) to strengthen the bonding with the concrete; the end plates (6) extend inwards to form lug plates, and bolt holes are reserved so as to be assembled through bolt connection.

4. The fabricated hybrid wind tower based on edge steel plate-bound concrete slabs of claim 1, wherein: the lower part of the pure steel tower cylinder (1) is welded with a flange plate (17) and is connected with the concrete tower cylinder (2) through a bolt (10), meanwhile, a prestressed rib (11) is stretched in a corrugated pipe (12) pre-embedded in the concrete tower cylinder (2), one end of the prestressed rib (11) is anchored on the flange plate (17) at the bottom of the pure steel tower cylinder (1), and the other end of the prestressed rib is anchored in a tower cylinder foundation.

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