Prefabricated assembly type concrete tower drum quick assembly structure

Abstract

A prefabricated assembly type concrete tower drum rapid assembly structure comprises embedded ribs, connecting plates and nuts. The splicing seam of the adjacent concrete tower drum pieces is filled with sealant; the pre-embedded ribs are pre-embedded in the concrete tower tube pieces on the two sides of the joint, and the pre-embedded ribs are arranged in the thickness direction of the concrete tower tube pieces; the embedded ribs on the two sides of the splicing seam are horizontally and correspondingly arranged; the inner ends of the embedded ribs exceed the inner side face of the concrete tower tube piece, and threads are arranged on the portions, exceeding the inner surface of the concrete tower tube piece, of the embedded ribs. The connecting plates are installed on the corresponding embedded ribs on the two sides of the splicing seam, and damping pads are arranged on the sides, close to the concrete tower drum pieces, of the connecting plates. The nuts are screwed on the pre-embedded ribs, and the connecting plate is connected to the concrete tower tube piece in a pressing mode. The utility model solves the technical problems that the cross section of the cylinder wall is weakened, the stress concentration of the cylinder wall is easy to occur, the production and installation process is complicated, the concrete quality is greatly influenced, and the bedding material is greatly influenced by environmental factors in the traditional method for forming holes in the tower cylinder wall.

Description

TECHNICAL FIELD

[0001] The utility model relates to wind power support tower technical field, especially a prefabricated assembly type concrete tower cylinder quick assembly structure. BACKGROUND

[0002] With the national attention to new energy industry, wind power technology enters a new development stage: the generator unit single machine power is bigger and bigger, the blade is longer and longer, the tower is higher and higher, and the tower technology as the wind power support structure also faces huge challenges. At present, the structure form of high tower is mainly steel tower and steel-concrete tower. Compared with steel structure tower, steel-concrete tower has big rigidity, good stability, high bearing capacity, good fatigue resistance, and adopts integral assembly technology, builds quickly, and its economy is better than that of steel tower, so that more than 180 meters super high tower basically adopts steel-concrete tower, therefore, the innovation of assembly type tower technology has become the first power of the industry.

[0003] The lower part of the assembly type steel-concrete hybrid tower is a prefabricated assembly type concrete tower cylinder, and the upper part is a steel tower cylinder, the steel tower cylinder and the concrete tower cylinder are connected as a whole by uniformly arranged post-tensioned prestressed steel strands, and work together to bear the load of the top wind turbine. The concrete tower cylinder is generally prefabricated at the base and transported to the wind turbine point, and assembled on site, and the assembly connection nodes mainly include horizontal joint nodes and vertical joint nodes. The horizontal joint between the vertical adjacent tower cylinders is connected by seat mortar, and the vertical joint between the adjacent cylinder pieces in the circumferential direction is connected by dry bolts, and epoxy resin structural adhesive is applied at the vertical joint. It can be seen that the assembly technology of the prefabricated cylinder piece assembly node of the tower cylinder is the key factor affecting the construction speed of the tower cylinder.

[0004] The vertical joint of the concrete tower cylinder adopts bolt connection, but the current common assembly method needs to embed the installation hand hole box for local hole cutting of the section when prefabricating the cylinder piece. In actual engineering, the wall thickness of the tower cylinder is relatively thin, generally about 300-400mm, and the installation of the hand hole box and the hole cutting of the section weaken the section of the tower cylinder component to a certain extent, which has a certain influence on the bearing capacity. Moreover, when embedding the hand hole installation box and the screw hole embedded part, the positioning and installation of the embedded part and the screw hole are not convenient due to the special-shaped components. When pouring concrete at the position of the hand hole installation box and the embedded part, it is difficult to vibrate due to the existence of the special-shaped components, which leads to the difficulty in controlling the quality of the concrete pouring. When the bolt connection is carried out, the bolt hole is difficult to align. When the pre-tightening force of the bolt is applied, if the final torque value is not properly controlled, the concrete tower may crack or be crushed.

[0005] The horizontal joint between the upper and lower tower sections of the concrete tower drum is connected by using the grouting construction technology, and the grouting material mainly includes cement-based grouting material and adhesive material such as epoxy resin adhesive. Although the grouting material of the horizontal joint can play a role in bonding and sealing, the grouting material is not uniformly and fully applied, and the horizontal joint is often not dense due to the cavity, which causes unreasonable stress of the concrete tower section, stress concentration, and influence on the bearing capacity of the structure. The construction process and quality have a great influence on the service life of the tower. In addition, the grouting material is greatly affected by the environmental temperature, and cannot be normally constructed under low temperature conditions. Practical new type content

[0006] The utility model discloses a prefabricated assembly type concrete tower drum quick assembly structure, and aims to solve the technical problems that the traditional pre-buried construction hand hole and bolt hole in the wall of the cylinder weaken the section of the component and cause stress concentration, the production and installation process is relatively complex, the quality of concrete is greatly influenced, the grouting material is greatly influenced by environmental factors, and normal construction work cannot be carried out under low temperature conditions.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme.

[0008] A prefabricated assembly type concrete tower drum quick assembly structure is used to connect horizontally adjacent concrete tower drum pieces or vertically adjacent concrete tower drum pieces, and comprises a pre-buried reinforcing bar, a connecting plate and a nut. A sealing adhesive is filled in the joint of the adjacent concrete tower drum pieces. The pre-buried reinforcing bar is pre-buried in the concrete tower drum pieces on both sides of the joint, and is arranged along the thickness direction of the concrete tower drum piece. The pre-buried reinforcing bars on both sides of the joint are arranged horizontally correspondingly. The inner end of the pre-buried reinforcing bar exceeds the inner side surface of the concrete tower drum piece, and a thread is arranged on the part of the pre-buried reinforcing bar exceeding the inner surface of the concrete tower drum piece. The connecting plate is installed on the inner end of the corresponding pre-buried reinforcing bar on both sides of the joint, and a damping pad is arranged on the side of the connecting plate close to the inner side surface of the concrete tower drum piece. The nut is screwed on the pre-buried reinforcing bar, and the connecting plate is pressed on the inner side surface of the concrete tower drum piece.

[0009] Preferably, the outer end of the pre-buried reinforcing bar is located in the concrete tower drum piece, and an anti-disengagement end head is arranged on the outer end of the pre-buried reinforcing bar. The length of the pre-buried reinforcing bar in the concrete tower drum piece is not less than the designed anchoring length.

[0010] Preferably, the outer end of the pre-buried reinforcing bar exceeds the outer side surface of the concrete tower drum piece, and a thread is arranged on the part of the pre-buried reinforcing bar exceeding the outer surface of the concrete tower drum piece. The connecting plate is installed on the outer end of the corresponding pre-buried reinforcing bar on both sides of the joint, and a through hole penetrating through the pre-buried reinforcing bar is arranged on the connecting plate on the outer end of the pre-buried reinforcing bar and on the connecting plate on the inner end of the pre-buried reinforcing bar. The damping pad is arranged on the side of the connecting plate close to the outer side surface of the concrete tower drum piece. The nut is arranged on the side of the connecting plate away from the outer surface of the concrete tower drum piece, and the connecting plate is pressed on the concrete tower drum piece through the nut.

[0011] Preferably, the damping pad is made of rubber or polystyrene or polyurethane or asphalt and is bonded to the connecting plate.

[0012] Preferably, the concrete tower cylinder piece is a reinforced concrete cylinder piece, and the embedded steel bars are connected to vertical steel bars and circumferential steel bars of the concrete tower cylinder piece.

[0013] Compared with the prior art, the utility model has the following characteristics and beneficial effects.

[0014] 1. The utility model provides a high-efficiency and high-speed joint assembling mode for the technical problems of the existing concrete tower cylinder joint node, reduces construction energy consumption, significantly improves construction efficiency and reduces cost, further plays the advantages of the fabricated construction technology, and the connecting mode can be used for assembling of vertical joints and horizontal joints of the fabricated concrete tower cylinder, and the prefabricated and assembled concrete tower cylinder quick assembling structure design can effectively improve the connecting quality of the tower cylinder, improve construction efficiency, enhance the anti-seismic property and the waterproof performance.

[0015] 2. The utility model simplifies the forms of the embedded parts and the connecting parts, is more convenient during prefabrication and installation, simultaneously cancels the connecting hand hole embedded part and the arc-shaped bolt hole channel, simplifies the production and installation process, greatly improves the production efficiency, reduces the labor intensity of personnel, shortens the construction period, and reduces cost.

[0016] 3. The utility model increases the damping pad, the damping pad can not only coordinate the deformation between the connecting plate and the concrete tower cylinder piece, but also buffers the tower cylinder vibration, increases the vibration reduction and energy consumption design of the node, and can effectively prolong the service life of the connecting component.

[0017] 4. The utility model is small in influence of environmental constraint factors during construction, can be assembled under low-temperature conditions, and two connecting schemes are developed, if the outer side of the tower cylinder does not have construction conditions, a single-side connecting scheme can also be selected, operation is flexible and convenient, and the assembling efficiency is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further explained in detail in combination with the drawings.

[0019] Figure 1 is a horizontal section structure schematic view of the prefabricated and assembled concrete tower cylinder when the connecting plate and the embedded steel bars are single-sidedly arranged in the utility model.

[0020] Figure 2 is a connecting structure elevation view of horizontally adjacent concrete tower cylinder pieces in the utility model.

[0021] Figure 3 This is a schematic diagram of the horizontal cross-section of the connection structure of horizontally adjacent concrete tower sections when the connecting plate and the embedded reinforcement are set on one side in this utility model.

[0022] Figure 4 This is a schematic diagram of the structure in which the pre-embedded reinforcing bars are inserted into the connecting plate in this utility model.

[0023] Figure 5 This is an elevation view of the connection structure between vertically adjacent concrete tower sections in this utility model.

[0024] Figure 6 This is a schematic diagram of the longitudinal section of the connection structure of vertically adjacent concrete tower sections when the connecting plate and the embedded reinforcement are set on one side in this utility model.

[0025] Figure 7 This is a schematic diagram of the horizontal cross-section of the prefabricated concrete tower when the connecting plate and the embedded reinforcement are set on both sides in this utility model.

[0026] Figure 8 This is a schematic diagram of the horizontal cross-section of the connection structure of horizontally adjacent concrete tower sections when the connecting plate and the embedded reinforcement are set on both sides in this utility model.

[0027] Figure 9 This is a schematic diagram of the longitudinal section of the connection structure of vertically adjacent concrete tower sections when the connecting plate and the embedded reinforcement are set on both sides in this utility model.

[0028] Attached reference numerals: 1-Concrete tower section, 2-Shim, 3-Embedded reinforcement, 4-Connecting plate, 5-Damping pad, 6-Nut. Detailed Implementation

[0029] like Figures 1-9 As shown, this prefabricated assembled concrete tower structure is used to connect horizontally adjacent concrete tower sections 1 or vertically adjacent concrete tower sections 1. The concrete tower sections 1 are prefabricated reinforced concrete sections. The prefabricated assembled concrete tower structure includes embedded reinforcing bars 3, connecting plates 4, and nuts 6. Sealant is used to fill the joints between adjacent concrete tower sections 1. The embedded reinforcing bars 3 are embedded in the concrete tower sections 1 on both sides of the joint, and the embedded reinforcing bars 3 run along the concrete tower section. The thickness direction of the plate 1 is set; the embedded bars 3 on both sides of the splice joint are set horizontally; the inner end of the embedded bar 3 extends beyond the inner side of the concrete tower plate 1, and the embedded bar 3 is provided with threads at the part that extends beyond the inner surface of the concrete tower plate 1; the connecting plate 4 is installed on the inner end of the corresponding embedded bar 3 on both sides of the splice joint, and a damping pad 5 is provided on the side of the connecting plate 4 near the inner side of the concrete tower plate 1; the nut 6 is screwed on the embedded bar 3, pressing the connecting plate 4 onto the inner side of the concrete tower plate 1.

[0030] In this embodiment, the embedded steel bars 3 are arranged along the vertical and horizontal directions, and the embedded steel bars 3 are embedded in the concrete tower piece 1 as anchoring segments to ensure the effective transmission of internal forces between the concrete tower piece 1 and the connecting piece.

[0031] In this embodiment, the embedded steel bars 3 can penetrate the tower piece, and are arranged on both sides of the tower piece. The single side or both sides of the connecting plate 4 and the embedded steel bars 3 are arranged according to the external load to determine the final scheme.

[0032] In one embodiment, the outer end of the embedded steel bar 3 is located in the concrete tower piece 1, and a anti-loosening end head is arranged at the outer end of the embedded steel bar 3. The length of the embedded steel bar 3 in the concrete tower piece is not less than the designed anchoring length. Of course, other anchoring methods can also be used in other embodiments.

[0033] In another embodiment, the outer end of the embedded steel bar 3 is located outside the outer side surface of the concrete tower piece 1, and a thread is arranged on the part of the embedded steel bar 3 that is outside the outer surface of the concrete tower piece 1. The connecting plate 4 is arranged on the corresponding outer end of the embedded steel bar 3 on both sides of the joint. The connecting plate 4 is provided with a through hole penetrating the embedded steel bar 3 on both the connecting plate 4 arranged on the outer end of the embedded steel bar 3 and the connecting plate 4 arranged on the inner end of the embedded steel bar 3. The connecting plate 4 is provided with the damping pad 5 on the side close to the outer side surface of the concrete tower piece 1. The nut 6 is arranged on the side of the connecting plate 4 away from the outer surface of the concrete tower piece 1, and the connecting plate 4 is pressed on the concrete tower piece 1 through the nut 6.

[0034] In this embodiment, the damping pad 5 is bonded to the connecting plate 4, and the connecting plate 4 spans the adjacent concrete tower piece 1 to connect the two concrete tower pieces 1 into a force-bearing whole. The damping pad 5 is made of rubber, polystyrene, polyurethane or asphalt. The damping pad 5 is arranged between the concrete tower piece 1 and the connecting plate 4 to avoid damage caused by vibration due to the good elasticity and deformation capacity of the damping pad 5, and to play a role of shock absorption and buffering. In addition, the connecting segment of the concrete tower piece 1 and the connecting plate 4 is a circular arc segment, and the damping pad can reduce the friction and wear between the concrete tower piece 1 and the connecting plate 4, so that the connecting piece works better and the fatigue damage is reduced. The arrangement of the damping pad 5 can effectively absorb energy, ensure the safety of the node, and prolong the service life of each component. The gasket 2 is arranged between the nut 6 and the connecting plate 4.

[0035] In this embodiment, the horizontal cross section of the concrete tower piece 1 is in the shape of a circular arc, and the horizontally adjacent concrete tower pieces 1 are in the shape of a circular arc.

[0036] In this embodiment, the embedded reinforcement 3 is placed at the corresponding position during the prefabrication of the precast concrete tower segment 1, while the vertical and circumferential reinforcements of the precast concrete tower segment 1 are being tied. The embedded reinforcement 3 is connected to the vertical and circumferential reinforcements of the precast concrete tower segment 1, with the threaded ends exposed. It is then poured together with the concrete, and the precast concrete tower segment 1 is transported to the site for assembly. During assembly, the pre-drilled damping pad 5 and connecting plate 4 are installed on the embedded reinforcement 3, and finally the washer 2 and nut 6 are installed and tightened to complete the splicing of the vertical joint node.

[0037] In this embodiment, the horizontal splice joint of the concrete tower section 1 is constructed using the following method: Figures 2-3 The connection method shown has the same main connecting components and vertical joint nodes. The key points for implementing the horizontal splice joint connection method are as follows: When precasting the concrete tower segment 1, while installing the formwork and binding the vertical and circumferential reinforcing bars of the precast concrete tower segment 1, the embedded reinforcing bars 3 are placed at the corresponding positions, with the threaded ends exposed. They are then poured together with the concrete, and the precast concrete tower segment 1 is transported to the site for assembly. During assembly, epoxy resin adhesive is first applied to the four sides of the precast concrete tower segment 1. After the upper and lower precast segments are vertically aligned and leveled, the pre-drilled damping pads 5 and connecting plates 4 are installed on the embedded reinforcing bars 3. Finally, the washers 2 and nuts 6 are installed to complete the splicing of the horizontal splice joint node.

[0038] In this embodiment, there is a variety of material choices: First, in addition to steel bars, carbon fiber bars, column anchor bolts, or other materials that can be reliably anchored in concrete can also be used for the embedded reinforcement 3. The diameter, number, length, and spacing of the embedded reinforcement 3 in the load-bearing components of this utility model, the size of the steel plate, and the pre-tightening force of the installation nuts all need to be designed and determined according to the external load of the tower.

[0039] The above embodiments are not exhaustive examples of specific implementation methods, and other embodiments may also exist. The purpose of the above embodiments is to illustrate the present utility model, rather than to limit the protection scope of the present utility model. All applications derived from simple variations of the present utility model fall within the protection scope of the present utility model.

Claims

1. A prefabricated, assembled concrete tower structure for connecting horizontally adjacent concrete tower sections (1) or vertically adjacent concrete tower sections (1); characterized in that: The utility model provides a kind of embedded bar (3), connecting plate (4) and nut (6) are included;Sealant is filled in the joint of adjacent concrete tower cylinder piece (1);The embedded bar (3) is embedded in the concrete tower cylinder piece (1) of the joint two sides, and embedded bar (3) is arranged along the thickness direction of concrete tower cylinder piece (1);The embedded bar (3) of the joint two sides is horizontally arranged correspondingly;The inner end of the embedded bar (3) exceeds the inner side of concrete tower cylinder piece (1), and threaded is arranged on the part of embedded bar (3) exceeding the inner surface of concrete tower cylinder piece (1);The connecting plate (4) is installed on the inner end of corresponding embedded bar (3) of the joint two sides, and damping pad (5) is arranged on the side of connecting plate (4) close to the inner side of concrete tower cylinder piece (1);The nut (6) is screwed on embedded bar (3), and connecting plate (4) is pressed on the inner side of concrete tower cylinder piece (1).

2. The prefabricated concrete tower section quick assembly structure according to claim 1, characterized in that: The outer end of the embedded bar (3) is located in the concrete tower cylinder piece (1), and a anti-drop end head is arranged on the outer end of the embedded bar (3);The length of the embedded bar (3) in the concrete tower cylinder piece (1) is not less than the design anchoring length.

3. The prefabricated concrete tower section quick assembly structure according to claim 1, characterized in that: The outer end of the embedded bar (3) exceeds the outer side of concrete tower cylinder piece (1), and threaded is arranged on the part of embedded bar (3) exceeding the outer surface of concrete tower cylinder piece (1);The connecting plate (4) is installed on the outer end of corresponding embedded bar (3) of the joint two sides, and through-hole of embedded bar (3) is arranged on the connecting plate (4) of the outer end of embedded bar (3) and the connecting plate (4) of the inner end of embedded bar (3);The side of connecting plate (4) close to the outer side of concrete tower cylinder piece (1) is provided with the damping pad (5);Nut (6) is arranged on the side of connecting plate (4) away from the outer surface of concrete tower cylinder piece (1), and connecting plate (4) is pressed on concrete tower cylinder piece (1) by nut (6).

4. The prefabricated concrete tower section quick assembly structure according to claim 1 or 3, characterized in that: The damping pad (5) is bonded on the connecting plate (4), and the damping pad (5) is made of rubber or polystyrene or polyurethane or asphalt;A gasket (2) is arranged between the nut (6) and the connecting plate (4).

5. The prefabricated concrete tower section quick assembly structure according to claim 1, characterized in that: The concrete tower cylinder piece (1) is a reinforced concrete cylinder piece, and the part of the embedded bar (3) in the concrete tower cylinder piece (1) is connected with the vertical steel bars and the ring-shaped steel bars of the concrete tower cylinder piece (1).

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