Prefabricated polygonal prestressed concrete tower cylinder and manufacturing mold of cylinder sections thereof
Technical Field
The invention belongs to the technical field of wind power generation tower cylinders, and particularly relates to a prefabricated polygonal prestressed steel-concrete tower cylinder and a manufacturing mold of a cylinder section of the prefabricated polygonal prestressed steel-concrete tower cylinder.
Background
China has abundant wind power resources, and wind power generation plays a significant role in national generated energy, so that the method is an important measure for green sustainable development. In recent years, the wind power industry in China is developed at a high speed, the height of a tower barrel is higher and higher, the height of a wind generating set is increased from 90m to more than 140m, and the wind power generation capacity is correspondingly increased. When the height of the tower barrel exceeds 90m, the traditional pure steel tower barrel cannot meet the requirements (the height is too high, the natural frequency of the steel tower barrel can be reduced, and resonance can occur along with the rotation of the impeller), but the mixed tower (the upper steel tower barrel and the lower concrete tower barrel) can meet the safety requirements because of the higher natural frequency.
However, the concrete tower drum in the steel-concrete tower drum structure has high height and large diameter, the direct production and manufacturing process is complex, the difficulty in the transportation process is high, the field installation is also extremely difficult, and the cost is very high. And the circular concrete tower tube is not well positioned when the internal accessories are installed, and each section of the concrete tower tube cannot be continuously segmented when the segments are prefabricated. A mould is required to be customized for each section of tower section of thick bamboo in traditional concrete tower section of thick bamboo production prefabrication, causes the wasting of resources, and the cost is higher.
Disclosure of Invention
In order to solve the technical problems, the invention provides a prefabricated polygonal prestressed concrete tower cylinder and a manufacturing mold of cylinder sections thereof, which have the advantages of simple production process, low manufacturing cost, quick and simple transportation and installation and high safety factor, and ensure that a wind generating set can safely and reliably run at a specified height.
The technical scheme adopted by the invention is as follows: including concrete foundation, polygon concrete tower section of thick bamboo and prestressing force steel strand wires, its characterized in that: the concrete foundation comprises a pile foundation and a supporting platform, wherein a groove is formed in the upper surface of the supporting platform, the bottom end of the polygonal concrete tower barrel (2) is arranged in the groove, and a plurality of steel strand reinforcing holes are formed in the supporting platform (12).
In the prefabricated polygonal prestressed concrete tower cylinder, a plurality of reinforcing steel bars are equidistantly arranged in the concrete foundation, and the thickness of a grouting material layer between the groove of the concrete foundation and the polygonal concrete cylinder is not less than 20mm, so that the wind generating sets can be uniformly distributed on the concrete foundation.
In the prefabricated polygonal prestressed concrete tower cylinder, the number of the prefabricated polygonal concrete tower cylinder edges is even, the prefabricated polygonal concrete tower cylinder is formed by coaxially connecting a plurality of concrete cylinder sections, and two adjacent concrete cylinder sections are connected and fastened in a grouting material condensation mode; polygonal grooves are formed in the bottom surface of the bottom section concrete cylinder section, polygonal grooves are formed in the top surface of each section of concrete cylinder section, and the shape of each polygonal groove is consistent with that of the prefabricated polygonal concrete tower cylinder; the top surface of each concrete cylinder section is the same as the bottom surface of the concrete cylinder section connected with the upper end of the concrete cylinder section.
In the prefabricated polygonal prestressed concrete tower cylinder, each concrete cylinder section comprises two cylinder sections, a plurality of groups of embedded bolt structures and a plurality of groups of embedded nut structures, and the two cylinder sections are equal in size; a plurality of groups of embedded bolt structures and a plurality of groups of embedded nut structures are respectively arranged on two sides of the shell ring, the number of the embedded bolt structures is consistent with that of the embedded nut structures, and the embedded positions of the embedded bolt structures correspond to the embedded positions of the embedded nut structures one by one; the embedded bolt structure of one cylindrical section and the embedded nut structure of the other cylindrical section are positioned on the same side; the two shell sections are connected with the embedded nut structure through the embedded bolt structure to form a tubular structure; and the two contact surfaces of the two shell rings are solidified and fastened by grouting material.
In the prefabricated polygonal prestressed concrete tower cylinder, a groove is formed in one side of the cylinder section embedded bolt structure; the embedded bolt structure is formed by welding a bolt and a bolt reinforcing steel bar group, and the bolt is extended out of a splicing surface of the shell ring; the embedded nut structure is formed by welding a nut frame and a nut reinforcing steel bar group; the nut frame is of a square tubular structure, an opening of the nut frame is formed in the side wall of the shell ring, and the nut frame is provided with a bolt hole for a bolt to penetrate through; the bolt stretches into the nut frame by the bolt hole, connects through the nut, and the nut is located the nut frame.
In the prefabricated polygonal prestressed concrete tower cylinder, the connection positions of the embedded bolt structures and the embedded nut structures of the two adjacent sections of concrete cylinder sections are staggered by 60-120 degrees.
A manufacturing mould of a concrete cylinder section of a prefabricated polygonal prestressed concrete cylinder comprises a plurality of side templates and a plurality of corner templates; the corner angle of the corner template is consistent with the polygonal inner angle of the polygonal concrete tower barrel; the number of the corner templates is half of the number of the angles of the polygonal concrete tower barrel; the corner templates are respectively arranged at the corners of the cylindrical shell to be manufactured, the opposite side walls of two adjacent corner templates are positioned in the same plane, a plurality of side templates are embedded in the gap between the opposite side walls of the two corner templates, and the corner templates and the side templates form the cylindrical shell shape.
Compared with the prior art, the invention has the beneficial effects that:
1) according to the prefabricated polygonal prestressed concrete tower cylinder, the concrete foundation and the prefabricated polygonal concrete tower cylinder are internally provided with the reinforcing steel bars, so that the overall strength is enhanced;
2) the prefabricated polygonal concrete tower cylinder and the concrete foundation are condensed and fastened by adopting the high-strength grouting material, the prefabricated polygonal concrete tower cylinder is condensed and fastened by adopting the high-strength grouting material through a plurality of concrete cylinder sections, each concrete cylinder section is fastened by two cylinder sections by adopting a plurality of groups of embedded bolt structures and a plurality of groups of embedded nut structures, the high-strength grouting material is condensed and fastened in a contact surface, grooves are formed in the joints of the concrete foundation and the bottom section of the concrete cylinder section, and the top surface of each concrete cylinder section is provided with the groove, so that the contact surface of the high-strength grouting material is increased, and the safety coefficient is improved;
3) the prestressed steel strand is anchored after being tensioned in the concrete foundation and on the upper surface of the reinforced concrete transition section, so that the steel strand is in a tensioning state, wind prevention and shock absorption are provided for the concrete tower tube, and the safety coefficient is improved.
4) The invention has the advantages of simple and uniform stress of the concrete tower tube, simpler and more convenient production, transportation and installation processes, higher safety and lower cost.
5) According to the manufacturing mould for the cylinder section, the number of the side templates is increased or decreased, so that the cylinder sections of different concrete cylinder sections can be manufactured, the maximum utilization of resources is realized, and the cost is greatly reduced.
Drawings
Fig. 1 is a schematic structural diagram of a prefabricated octagonal prestressed concrete tower.
Fig. 2 is a schematic view of a concrete foundation structure of the present invention.
Fig. 3 is a bottom view of the concrete foundation of the present invention.
Fig. 4 is a schematic structural diagram of a prefabricated octagonal concrete tower tube.
Fig. 5 is a bottom view of the prefabricated octagonal concrete tower tube.
Fig. 6 is a schematic view of the installation of a concrete foundation and prestressed steel strands.
Fig. 7 is a bottom view of the concrete foundation and the prestressed steel strands installed.
Fig. 8 is a schematic view of the installation of a concrete foundation and a prefabricated octagonal concrete tower tube.
Fig. 9 is a schematic structural view of a concrete cylinder section.
Fig. 10 is a schematic structural view of a shell section.
Fig. 11 is a schematic structural view of a pre-embedded bolt structure.
Fig. 12 is a schematic structural view of a structure of the embedded nut.
Fig. 13 is an installation diagram of the embedded bolt structure and the embedded nut structure.
Fig. 14 is a schematic structural view of a manufacturing mold for producing an octagonal concrete cylinder section.
Figure 15 is a schematic view of a mold for making a shell section of an octagonal concrete shell section.
Fig. 16 is a schematic view of a molding of a shell section of another octagonal concrete shell section.
Fig. 17 is a schematic view of the corner template structure of the manufacturing mold (octagon) of the shell ring.
Fig. 18 is a schematic view of a side form of a manufacturing mold (octagonal) for a shell ring.
Fig. 19 is a schematic structural view of a manufacturing mold for producing a hexagonal concrete cylinder section.
Figure 20 is a schematic view of a mold for making a shell section of a hexagonal concrete shell section.
Figure 21 is a schematic view of a mold for making a shell section of another hexagonal concrete shell section.
Fig. 22 is a schematic view of the corner template structure of the manufacturing mold (hexagon) of the shell ring.
Figure 23 is a schematic representation of the results of a sideform of a manufacturing mould (hexagonal) for a shell ring.
In the figure: 1-concrete foundation, 2-prefabricated formula octagon concrete tower section of thick bamboo, 3-prestressing steel strand wires, 11-pile foundation, 12-supporting platform, 121-steel strand wires wear muscle hole, 21-end section concrete barrel section, 22-two sections concrete barrel section, 23-three sections concrete barrel section, 211-shell ring, 212-shell ring, 213-embedded bolt structure, 214-embedded nut structure, 2131-bolt, 2132-bolt reinforcing bar group, 2141-nut group, 2142-nut reinforcing bar group, 100-side form board, 200-corner template.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 13, the embodiment discloses an octagonal prestressed concrete tower barrel, which includes a concrete foundation 1, an octagonal concrete barrel 2, and prestressed steel strands 3. As shown in fig. 2, the concrete foundation 1 includes a pile foundation 11 and a supporting platform 12, and a plurality of steel bars are arranged in the concrete foundation 1 at equal intervals, so that the overall strength is enhanced. The pile foundation 11 is annular and is embedded underground. The supporting platform 12 is located on the pile foundation 11, the outer wall is circular, a groove is formed in the upper surface, the shape of the groove is consistent with that of the octagonal concrete tower barrel, and the width of the groove is slightly wider than the wall thickness of the bottom end of the octagonal concrete tower barrel 2. As shown in fig. 8, the bottom end of the octagonal concrete cylinder 2 is arranged in the groove, the concrete foundation 1 and the octagonal concrete cylinder 2 are connected by adopting a high-strength grouting material coagulation fastening method, the octagonal concrete cylinder 2 is fastened in the octagonal groove of the concrete foundation 1, the thickness of the high-strength grouting material layer is more than 20mm, so that the wind generating set can be uniformly distributed on the concrete foundation, and the cost is reduced. The top of the octagonal concrete cylinder body 2 is provided with a steel-concrete transition section for connecting a steel tower cylinder.
As shown in fig. 3 and 7, the support platform 12 is provided with 16 steel strand reinforcing holes 121, the number of the steel strand reinforcing holes 121 is the same as that of the steel strands 3, and reinforcing holes in the same number as that of the steel strands 3 are formed in the reinforced concrete transition section. The steel strand wires lower extreme anchor is in the bottom surface of wearing muscle hole 121, and the top surface of the muscle hole of wearing on the steel reinforced concrete changeover portion is anchored to steel strand wires 3 upper end, makes the steel strand wires be in the tensioning state, provides the shock attenuation of preventing wind for the concrete tower section of thick bamboo, has improved factor of safety. The steel strands 3 can be tensioned and anchored in the octagonal concrete cylinder 2, and can also be tensioned and anchored outside the octagonal concrete cylinder 2.
As shown in fig. 4 and 5, the octagonal concrete cylinder 2 is formed by coaxially connecting a plurality of concrete cylinder sections, and two adjacent concrete cylinder sections are solidified and fastened by using a high-strength grouting material. Be equipped with the octagon recess on the bottom surface of end section concrete barrel section 21, the top surface of every concrete barrel section is equipped with the octagon recess respectively, has increased the lifting surface area of high strength grouting material, and the cost is reduced has just improved factor of safety. As shown in fig. 5, the size of the upper end surface of the concrete cylinder section is the same as the size of the upper end surface of the concrete cylinder connected with the upper end surface of the concrete cylinder section. The octagonal concrete tower barrel can also be in an even-numbered polygonal shape such as a hexagon and a quadrangle.
As shown in fig. 9 and 10, each concrete cylinder section has the same structure as the bottom concrete cylinder section 21, and includes a cylinder section 211, a cylinder section 212, an embedded bolt structure 213, and an embedded nut structure 214, where the cylinder 211 and the cylinder 212 have the same size; the two sides of barrel 211 and barrel 212 are equipped with 3 groups of embedded bolt structures and 3 groups of embedded nut structures respectively, and the quantity of embedded bolt structure is unanimous with the quantity of embedded nut structure, and the embedded position one-to-one of embedded bolt structure 213 and embedded nut structure 214, and shell ring 211 and shell ring 212 connect into tubular structure through 3 groups of embedded bolt structure 213 and embedded nut structure 214, and the two contact surfaces department of shell ring 211 and shell ring 212 adopts the high strength grout material to condense the fastening, has improved factor of safety. A groove is formed in one side of the barrel body provided with the embedded bolt structure, and the contact area of the high-strength grouting material is increased through the groove.
As shown in fig. 11, 12 and 13, the embedded bolt structure 213 is formed by welding bolts 2131 and bolt steel bar groups 2132, each bolt steel bar group 2132 includes four steel bars, the bolts 2131 are welded to the end portions of the steel bars, the four steel bars are uniformly arranged along the circumferential direction, and the bolts 2131 and the bolt steel bar groups 2132 are embedded in the concrete cylinder section, so that the contact strength with the concrete cylinder section is increased. Bolt 2131 extends out of the split surface of the shell ring. 4 reinforcing steel bars are welded on the bolt reinforcing steel bar group 2132 respectively, so that the contact strength of the bolt reinforcing steel bar group with the concrete cylinder is increased; the embedded nut structure 214 is formed by welding a nut frame 2141 and a nut reinforcement group 2142, the nut reinforcement group 2142 comprises 4 reinforcements, the nut frame 2141 is welded at one end of the reinforcements, and the nut reinforcement group 2142 and the nut frame 2141 are embedded in the concrete cylinder section, so that the contact strength with the concrete cylinder section is increased. The nut frame is of a square tubular structure, the opening of the nut frame is formed in the side wall of the shell ring, and the nut frame 2141 is provided with a bolt hole for a bolt to pass through; the bolt 2131 extends into the nut frame 2141 through the bolt hole and is connected through a nut, and the nut is located in the nut frame 2141.
The embedded bolt structures 213 of two adjacent concrete cylinder sections and the embedded nut structure 214 are staggered by 90 degrees from each other at the connection position, so that the whole concrete tower cylinder is more uniform in stress and higher in safety factor.
As shown in fig. 14 to 18, the manufacturing mold for the shell ring of the prefabricated octagonal prestressed concrete tower cylinder of the present invention includes a side mold plate 100 and a corner mold plate 200. The corner angle of the corner template 200 is consistent with the polygonal inner angle of the octagonal concrete tower barrel; the number of the corner templates 200 is four, which is half of the number of corners of the octagonal concrete tower tube. The four corner templates 200 are respectively arranged at the corners of the cylindrical shell to be manufactured, the opposite side walls of two adjacent corner templates 200 are positioned in the same plane, a plurality of side templates 100 are embedded in the gap between the opposite side walls of the two corner templates 200, and the plurality of corner templates 200 and the plurality of side templates 100 form the cylindrical shell shape. The manufacturing die of the cylinder section is used for generating a cavity during building of the cylinder section.
As shown in fig. 15, the manufacturing mold of the shell ring comprises 32 sideforms 100 and 4 corner forms 200, and the 4 corner forms 200 are respectively placed at the corners of the shell ring to be manufactured. The opposite side walls of two adjacent corner templates 200 are located in the same plane, and 8 sideforms 100 are embedded in the gap between the opposite side walls of the two corner templates 200. The parallel side wall planes of the corner templates 200 at the two ends are respectively provided with 4 side templates 100 to form a cylindrical shell shape.
As shown in fig. 16, the manufacturing mold of the shell ring has 16 sideforms 100 and 4 corner forms 200, and the 4 corner forms 200 are respectively placed at the corners of the shell ring to be manufactured. The opposite side walls of two adjacent corner templates 200 are located in the same plane, and 4 sideforms 100 are embedded in the gap between the opposite side walls of the two corner templates 200. The parallel side wall planes of the corner templates 200 at the two ends are respectively provided with 2 side templates 100 to form a cylindrical shell shape. The manufacturing mould of the two cylinder sections is different only in the number of the side templates 100, and the cylinder sections of the concrete cylinder sections at different positions can be manufactured by increasing or decreasing the number of the side templates 100.
As shown in fig. 17, the corner angle of the corner template 200 is 135 ° consistent with the inner angle of the octagon; each section of octagonal concrete cylinder body only needs to add or subtract the number of the side templates 100 to form a new mold to finish production prefabrication, so that the maximum utilization of resources is realized, and the cost is greatly reduced.
Fig. 19 to 23 show another embodiment of a mould for manufacturing a shell ring according to the present invention, which is used for a hexagonal concrete tower shell, and comprises a plurality of sideforms 100 and a plurality of corner forms 200.
As shown in fig. 20, the manufacturing mold of the shell ring comprises 24 sideforms 100 and 3 corner forms 200 (the number of the corner forms 200 is half of the number of corners of the hexagonal concrete tower shell), and the 3 corner forms 200 are respectively placed at the corners of the shell ring to be manufactured. The opposite side walls of two adjacent corner templates 200 are located in the same plane, and 8 sideforms 100 are embedded in the gap between the opposite side walls of the two corner templates 200. The parallel side wall planes of the corner templates 200 at the two ends are respectively provided with 4 side templates 100 to form a cylindrical shell shape.
As shown in fig. 21, the manufacturing mold of the shell ring comprises 12 sideforms 100 and 3 corner forms 200, and the 3 corner forms 200 are respectively placed at the corners of the shell ring to be manufactured. The opposite side walls of two adjacent corner templates 200 are located in the same plane, and 4 sideforms 100 are embedded in the gap between the opposite side walls of the two corner templates 200. The parallel side wall planes of the corner templates 200 at the two ends are respectively provided with 2 side templates 100 to form a cylindrical shell shape. The manufacturing mould of the two cylinder sections is different only in the number of the side templates 100, and the cylinder sections of the concrete cylinder sections at different positions can be manufactured by increasing or decreasing the number of the side templates 100. As shown in fig. 22, the corner angle of the corner mold plate 200 is 120 ° in accordance with the inner angle of the octagon.
Each concrete cylinder section only needs to add or subtract the number of the side templates 100 to form a new mold to finish production prefabrication, so that the maximum utilization of resources is realized, and the cost is greatly reduced.