Upper tower section of concrete tower and concrete tower having the same

Abstract

The present invention discloses an upper tower section of a concrete tower and a concrete tower having the same. The upper tower section of the concrete tower is annular or sheet-shaped. When the upper tower section is sheet-shaped, multiple upper tower sections can be assembled into an annular shape along the circumferential direction. The upper tower section is provided with a prestressed channel that passes through from top to bottom. The bottom surface of the upper tower section is provided with a reserved hole groove corresponding to at least one prestressed channel. A prestressed tendon connector for fixing prestressed tendons is provided at the reserved hole groove. The volume of the reserved hole groove is greater than the volume of the prestressed tendon connector. The upper tower section of the concrete tower according to the embodiment of the present invention can offset the stress concentration generated by the prestressed tendon connector through the reserved hole groove, ensure the structural strength, and prevent local damage. The reserved hole groove can provide installation space for the prestressed tendon connector, which is convenient for construction.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation, in particular to an upper tower section of a concrete tower and a concrete tower having the same. Background Art

[0002] As wind turbine power generation efficiency increases, blade lengths are getting longer, and the height and cross-sectional dimensions of wind turbine towers that match them are also increasing. Concrete towers can economically build large wind turbines. Due to the use of supporting structures, lateral loads will be generated on concrete towers, and prestressing needs to be applied in advance. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide an upper tower section of a concrete tower, which can offset the force concentration generated by the prestressed tendon connector after the prestress is applied through the structural design of the upper tower section, which is beneficial to the construction of the prestressed tendon connector.

[0004] The present invention also provides a concrete tower having an upper tower section of the concrete tower.

[0005] According to the upper tower section of the concrete tower of the embodiment of the first aspect of the present invention, the upper tower section is a prefabricated part, and the upper tower section is annular or sheet-shaped. When the upper tower section is sheet-shaped, multiple upper tower sections can be assembled into a ring along the circumferential direction; the upper tower section is provided with a prestressed channel running through from top to bottom, and a reserved hole groove is provided on the bottom surface of the upper tower section corresponding to at least one of the prestressed holes, and a prestressed tendon connector for fixing the prestressed tendons is provided at the reserved hole groove, and the volume of the reserved hole groove is greater than the volume of the prestressed tendon connector.

[0006] According to the upper tower section of the concrete tower of the embodiment of the present invention, a prestressed tendon connector is arranged in the wall of the concrete tower by setting a reserved hole groove at the bottom of the upper tower section, which provides a new fixing method for the prestressed tendon connector. The reserved hole groove can provide installation space for the prestressed tendon connector, which is convenient for construction.

[0007] In addition, the upper tower section of the concrete tower section of the embodiment of the present invention also has the following additional technical features:

[0008] In some embodiments of the present invention, the reserved hole groove is open on a side facing the annular inner circumference.

[0009] In some embodiments of the present invention, the upper tower section includes three sections from bottom to top: a thick base section, a thin-wall section and a transition section, the reserved hole groove is arranged on the thick base section, the thin-wall section is located above the thick base section, the thickness of the thin-wall section is less than the thickness of the thick base section, the transition section is connected between the thick base section and the thin-wall section, and the thickness of the transition section gradually decreases from bottom to top.

[0010] Optionally, the slopes of the two side surfaces of the transition section are both less than or equal to 30 degrees.

[0011] Optionally, the thickness of the thick base section is 2-3 times the thickness of the thin-wall section.

[0012] In some embodiments of the present invention, a corrugated pipe is pre-buried in the upper tower section, the corrugated pipe is arranged vertically, and the bottom of the corrugated pipe extends into the reserved hole groove.

[0013] In some embodiments of the present invention, the upper tower section is a prefabricated component.

[0014] In some embodiments of the present invention, reinforcing bars are pre-buried in the upper tower section, and the reinforcing bars are arranged around the reserved holes and grooves.

[0015] The present invention also provides a concrete tower having an upper tower section of the concrete tower according to the above embodiment.

[0016] The concrete tower according to the second embodiment of the present invention comprises a plurality of tower sections arranged in sequence from bottom to top, and at least one tower section is an upper tower section of the concrete tower of any one of the above embodiments.

[0017] According to the concrete tower of the embodiment of the present invention, the stress concentration generated by the prestressed tendon connector can be offset by the upper tower section, thereby preventing local damage and ensuring the stability of the concrete tower.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a schematic structural diagram of a concrete tower according to an embodiment of the present invention;

[0021] Figure 2 is a schematic structural diagram of a sheet-like tower section of a concrete tower according to an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of the annular structure of a tower section of a concrete tower according to an embodiment of the present invention;

[0023] Figure 4 2 is a schematic diagram of a connection cross-sectional structure of an upper tower section and a tower section wall of a concrete tower according to an embodiment of the present invention;

[0024] Figure 5 is a schematic diagram of the cross-sectional structure of the wall of the upper tower section of the concrete tower according to an embodiment of the present invention;

[0025] Figure 6 yes Figure 5 A magnified view of the structure of part A in the middle.

[0026] Reference numerals:

[0027] The upper tower section of the concrete tower 100,

[0028] Thick base section 1, reserved hole slot 11, thickness M of thick base section,

[0029] Thin-walled section 2, thickness of thin-walled section N,

[0030] Transition section 3, slope 31,

[0031] Bellows 4, prestressed channel 41,

[0032] Strengthen the reinforcement 5.

[0033] Tower section 200, positioning screw 10, positioning groove 20, leveling groove 30,

[0034] Prestressed tendon connector 300,

[0035] Concrete tower 1000,

[0036] Tower crane device 2000 and support arm structure 3000. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] A concrete tower 1000 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0039] like Figure 1As shown, the concrete tower 1000 according to the embodiment of the present invention includes a plurality of tower sections 200 arranged sequentially from bottom to top, and the concrete tower 1000 is a prefabricated tower. Specifically, the tower sections 200 required for the construction of the concrete tower 1000 are prefabricated in a factory. After the prefabricated plurality of tower sections 200 are transported from the prefabrication factory to the use site, they are sequentially spliced ​​upward from bottom to top to form a high tower.

[0040] like Figure 2 and Figure 3 As shown, since multiple tower sections 200 need to be assembled on site at the place of use, the hoisting of the tower section 200 is a high-altitude operation with high construction difficulty, and a tower crane device 2000 is required for hoisting. In order to ensure smooth hoisting, when each tower section 200 is prefabricated, multiple positioning screws 10 are arranged along the circumference of the upper end surface, and multiple positioning grooves 20 are arranged on the lower end surface. When two adjacent tower sections 200 are assembled, they can be positioned by the positioning screws 10 and the positioning grooves 20, and then the horizontality can be adjusted by the leveling grooves 30 arranged on the upper end surface and the lower end surface of each tower section 200, so that the two adjacent tower sections 200 can be assembled accurately.

[0041] In the process of hoisting the concrete tower 1000 described in the embodiment of the present invention by the tower crane 2000, as the tower section that has been hoisted increases in height, the tower crane 2000 also needs to be raised accordingly. In the prior art, the height of some concrete towers can even reach more than 100 meters, so the tower crane needs to be higher. In order to ensure construction safety, it is proposed in the embodiment of the present invention that the tower crane 2000 is fixed on a suitable tower section 200 in the hoisted tower section 200.

[0042] like Figure 1 As shown, the tower crane 2000 is connected to a suitable tower section 200 through at least one arm structure 3000. Optionally, the tower crane 2000 is provided with arm structures 3000 at 1 / 3 height and 2 / 3 height, and the tower crane 2000 is connected to two arm structures 3000. In this way, the concrete tower 1000 can provide support force for the tower crane 2000, so as to prevent the tower crane 2000 from bending or swinging greatly due to being too high.

[0043] However, when the tower crane device 2000 is connected to the concrete tower 1000 through the arm structure 3000, a lateral load will be applied to the tower section 200 through the arm structure 3000. Therefore, in order to prevent the above-mentioned arm structure 3000 from causing the concrete tower 1000 to tilt or collapse, it is necessary to apply prestress in advance to the tower section 200 that has been hoisted.

[0044] In order to solve the above problems, an upper tower section 100 of a concrete tower 1000 is proposed in an embodiment of the present invention, and a prestressed tendon connector 300 is used to anchor the prestressed tendon. Specifically, the prestressed tendon connector 300 is set in the wall of the concrete tower, and the prestressed anchor point and the prestressed tendon are located on the same straight line. On the same upper tower section 100, multiple prestressed tendon connectors 300 can be set, and multiple prestressed tendon connectors 300 are spaced apart.

[0045] According to the concrete tower 1000 of the embodiment of the present invention, the prestressed tendon connector 300 is arranged in the reserved hole groove 11 of the upper tower section 100, rather than being arranged outside the tower section, so that the prestressed anchor point and the prestressed tendon can be located on the same straight line, thereby offsetting the stress concentration generated by the prestressed tendon connector 300, preventing local damage, and ensuring the stability of the concrete tower 1000.

[0046] Reference below Figure 1-Figure 6 An upper tower section 100 of a concrete tower 1000 according to an embodiment of the present invention is described.

[0047] According to the upper tower section 100 of the concrete tower 1000 of the embodiment of the present invention, the upper tower section 100 is annular or sheet-shaped. When the upper tower section 100 is sheet-shaped, multiple upper tower sections 100 can be assembled into an annular shape along the circumferential direction. The upper tower section 100 is provided with a prestressed channel 41 that passes through from top to bottom. The bottom surface of the upper tower section 100 is provided with a reserved hole groove 11 corresponding to at least one prestressed channel 41, and the volume of the reserved hole groove 11 is greater than the volume of the prestressed tendon connector 300. In other words, the prestressed tendon can pass through the prestressed channel 41, and one end of the prestressed tendon can be anchored at the lower end of the upper tower section 100 through the prestressed tendon connector 300.

[0048] In some examples, the upper tower section 100 is at one-third of the height of the concrete tower 1000, and the other end of the prestressed tendon can be anchored to the upper anchoring structure, for example, anchored to another prestressed tendon connector 300 at two-thirds of the height of the concrete tower 1000. Of course, the upper tower section 100 can also be at two-thirds of the height of the concrete tower 100, in which case the other end of the prestressed tendon can be anchored to the anchoring structure at the top of the concrete tower 1000. The position of the upper tower section 100 is not limited here.

[0049] A prestressed tendon connector 300 may be provided in the reserved hole groove 11. On the one hand, the reserved hole groove 11 can provide an installation space for the prestressed tendon connector 300 to facilitate construction, while hiding the prestressed tendon connector 300 in the reserved hole groove 11. On the other hand, concrete can be poured into the reserved hole groove 11 to offset the stress concentration generated by the prestressed tendon connector 300, thereby ensuring the strength of the groove position of the reserved hole groove 11 and preventing local damage.

[0050] The upper tower section 100 may be processed in different ways according to actual production, transportation or installation requirements. Figure 6 As shown, the upper tower section 100 may be annular, and the annular upper tower section 100 is directly assembled to the tower. Figure 5 As shown, the upper tower section 100 can also be in sheet form, and multiple sheet-shaped upper tower sections 100 are assembled into a ring along the circumferential direction, and then the upper tower section 100 of the ring structure is assembled onto the tower. There can be multiple upper tower sections 100 on the concrete tower 1000.

[0051] According to the upper tower section 100 of the concrete tower 1000 of the embodiment of the present invention, the reserved holes and grooves 11 can offset the stress concentration generated by the prestressed tendon connector 300, ensure the structural strength and prevent local damage. The reserved holes and grooves 11 can provide installation space for the prestressed tendon connector 300 to facilitate construction.

[0052] In some embodiments of the present invention, the reserved hole groove 11 is open on the side facing the inner periphery of the ring, so that the prestressed tendon connector 300 can enter the wall of the upper tower section 100 from the open part of the reserved hole groove 11, which is beneficial to the installation of the prestressed tendon connector 300 and the injection of concrete into the reserved hole groove 11 from the open position, which is convenient for construction. Optionally, the reserved hole groove 11 can also be open on the side facing the outer periphery of the ring. It can be understood that the reserved hole groove 11 is open to one side to facilitate the installation of the prestressed tendon connector 300 and the injection of concrete. Therefore, whether the reserved hole groove 11 is open to the side facing the inner periphery of the ring or the side facing the outer periphery of the ring has no effect on this, and is not limited here.

[0053] In some embodiments of the present invention, Figure 4 , Figure 5 and Figure 6 As shown, the upper tower section 100 includes three sections from bottom to top, namely a thick base section 1, a thin wall section 2 and a transition section 3, wherein the reserved hole groove 11 is arranged on the thick base section 1, the thin wall section 2 is located above the thick base section 1, the thickness N of the thin wall section 2 is less than the thickness M of the thick base section 1, and the transition section 3 is connected between the thick base section 1 and the thin wall section 2, and the thickness of the transition section 3 gradually decreases from bottom to top.

[0054] That is to say, the thick base section 1 is the thickest section in the upper tower section 100, and the prestressed tendon connector 300 is installed in the thick base section 1. Since the thick base section 1 is thicker, after the prestressed tendon connector 300 is installed in the thick base section 1, concrete is injected into the reserved hole groove 11, so that the thick base section 1 can withstand greater ground force than other positions of the upper tower section 100, thereby offsetting the stress concentration caused by the prestressed tendon connector 300.

[0055] It should be noted that the thickness N of the thin-walled section 2 is the normal thickness of the tower. In order to form a clear name comparison with other positions of the upper tower section 100, this position of the tower in the upper tower section 100 is named thin-walled section 2.

[0056] Specifically, in the direction from bottom to top of the upper tower section 100, there are respectively a thick base section 1, a transition section 3 and a thin-walled section 2. The thick base section 1 is connected to the lower tower section 200. The prestressed tendons pass through the lower tower section 200 and cooperate with the prestressed tendon connector 300. The prestressed tendon connector 300 anchors one end of the prestressed tendons. The prestressed tendon connector 300 can also anchor one end of another section of prestressed tendons. The other section of prestressed tendons can pass through the prestressed channel 41 of the upper tower section 100, and then be stretched upward and anchored at the upper end of the upper tower section 100 or the upper end of any tower section 200 above the upper tower section 100.

[0057] The thickness of the transition section 3 decreases gradually from bottom to top, that is, the thickness from the upper end of the thick base section 1 to the lower end of the thin wall section 2 decreases gradually, thus avoiding stress concentration and damage between the thick base section 1 and the thin wall section 2.

[0058] Optionally, the slopes 31 of the two side surfaces of the transition section 3 are both less than 30 degrees. It can be understood that the length of the transition section 3 can be determined by the slopes 31 of the two side surfaces of the transition section 3. If the slope 31 is too large, the transition section 3 is shorter, which not only increases the processing difficulty, but also is not conducive to the transition section 3 offsetting the stress concentration between the thick base section 1 and the thin-walled section 2. Therefore, the slopes 31 of the two side surfaces of the transition section 3 are preferably less than 30 degrees.

[0059] Optionally, the thickness M of the thick base section 1 is 2-3 times the thickness N of the thin-walled section 2, that is, the thickness M of the thick base section 1 can be 2 times the thickness N of the thin-walled section 2, and the thickness M of the thick base section 1 can be 3 times the thickness N of the thin-walled section 2. The thickness M of the thick base section 1 is increased mainly to offset the stress generated by the prestressed tendon connector 300. If the thickness M is too thin, it will not play a role in offsetting the stress. If the thickness M is too thick, it will easily increase the difficulty of production and installation. Therefore, the thickness M of the thick base section 1 is preferably 2-3 times the thickness N of the thin-walled section 2.

[0060] In some embodiments of the present invention, a bellows 4 is pre-buried in the upper tower section 100, and the bellows 4 is arranged vertically, and the bottom of the bellows 4 extends into the reserved hole groove 11. That is to say, the bellows 4 is first placed in the mold for producing the upper tower section 100 when the upper tower section 100 is produced. After the casting of the upper tower section 100 is completed, the bellows 4 is fixed in the upper tower section 100, and the pipe of the bellows 4 is the prestressed channel 41. The bellows 4 can withstand a certain amount of tension and compression, and can ensure that the bellows 4 is not damaged when the upper tower section 100 is cast. In this way, after the bellows 4 is fixed in the upper tower section 100, the effect of the prestressed channel 41 passing up and down is better. The bottom of the bellows 4 extends into the reserved hole groove 11 to ensure that the prestressed tendons can pass through the bellows 4 and enter the reserved hole groove 11, and then the prestressed tendons cooperate with the prestressed tendon connector 300 to apply prestress to the upper tower section 100.

[0061] In the present invention, the upper tower section 100 is a prefabricated component. Since the upper tower section 100 has high structural accuracy requirements and is difficult to achieve at the construction site, it can be prefabricated in a production factory and then transported to the construction site by transportation tools, which can simplify the production difficulty, improve production accuracy, and ensure the stability of the structure of the upper tower section 100.

[0062] In some embodiments of the present invention, reinforcing bars 5 are embedded in the upper tower section 100, and the reinforcing bars 5 are arranged around the reserved hole slot 11. That is, in order to further enhance the structural strength in the limited size structure of the reserved hole slot 11, reinforcing bars 5 can be arranged around the reserved hole slot 11 when the upper tower section 100 is produced. When concrete is injected into the reserved hole slot 11, the concrete and the reinforcing bars 5 can form a reinforced concrete structure. The reinforced concrete structure has good rigidity and strength, and can effectively offset the stress generated by the prestressed tendon connector 300.

[0063] Optionally, the reinforcing reinforcement 5 can also extend into the transition section 3 or the thin-wall section 2. For example, the reinforcing reinforcement 5 surrounds the reserved hole groove 11 and then extends upward, passing through the transition section 3 and part of the thin-wall section 2, so as to further strengthen the structural strength of the upper tower section 100.

[0064] Other structures of the concrete tower 1000 according to the embodiment of the present invention, such as the tower foundation and the operation thereof, are well known to those skilled in the art and will not be described in detail here.

[0065] Reference below Figure 4-Figure 6 The specific structure of the upper tower section 100 of a concrete tower 1000 according to a specific embodiment of the present invention is described.

[0066] like Figure 4-Figure 6As shown, the upper tower section 100 of the concrete tower 1000 of this embodiment includes a thick base section 1, a thin-wall section 2 and a transition section 3. A reserved hole groove 11 is provided on the thick base section 1. The size of the reserved hole groove 11 is larger than the size of the prestressed tendon connector 300. The reserved hole groove 11 is open on the side of the annular inner periphery facing the upper tower section 100. The thin-wall section 2 is located above the thick base section 1. The thickness M of the thick base section 1 is twice the thickness N of the thin-wall section 2. The transition section 3 is connected between the thick base section 1 and the thin-wall section 2. The thickness of the transition section 3 gradually decreases from bottom to top, and the slopes 31 of the two side surfaces of the transition section 3 are both equal to 30 degrees.

[0067] Specifically, a corrugated pipe 4 and reinforcing bars 5 are embedded in the upper tower section 100. The corrugated pipe 4 is vertically arranged, and the bottom of the corrugated pipe 5 extends into the reserved hole groove 11. The inner wall of the corrugated pipe 4 forms a reserved channel. The reserved channel 41 penetrates the upper tower section 100 in the up and down directions. The reinforcing bars 5 are arranged around the reserved hole groove 11, and the reinforcing bars 5 extend upward and pass through the transition section 3 and part of the thin-wall section 2.

[0068] In the description of this specification, the description with reference to the terms "some embodiments" or "optionally" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0069] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An upper tower section of a concrete tower, characterized in that: The upper tower section is a prefabricated part, and the upper tower section is annular or sheet-shaped. When the upper tower section is sheet-shaped, a plurality of the upper tower sections can be assembled into an annular shape along the circumferential direction; The upper tower section is provided with a prestressed channel that passes through from top to bottom, and a reserved hole groove is provided on the bottom surface of the upper tower section corresponding to at least one of the prestressed channels, and a prestressed tendon connector for fixing the prestressed tendons is provided at the reserved hole groove, and the volume of the reserved hole groove is greater than the volume of the prestressed tendon connector; The upper tower section includes three sections from bottom to top: A thick base section, wherein the reserved holes and grooves are arranged on the thick base section; A thin-walled section, the thin-walled section is located above the thick base section, the thickness of the thin-walled section is less than the thickness of the thick base section, and the thickness of the thick base section is 2-3 times the thickness of the thin-walled section; A transition section is connected between the thick base section and the thin wall section, the thickness of the transition section gradually decreases from bottom to top, and the slopes of the two side surfaces of the transition section are both less than or equal to 30 degrees.

2. The upper tower section of the concrete tower according to claim 1, characterized in that: The reserved hole groove is open on the side facing the annular inner circumference.

3. The upper tower section of the concrete tower according to claim 1, characterized in that: A corrugated pipe is pre-buried in the upper tower section. The corrugated pipe is arranged vertically, and the bottom of the corrugated pipe extends into the reserved hole groove.

4. The upper tower section of the concrete tower according to claim 1, characterized in that: Reinforcement bars are pre-buried in the upper tower section, and the reinforcement bars are arranged around the reserved holes and grooves.

5. A concrete tower, characterized in that: It comprises a plurality of tower sections arranged in sequence from bottom to top, and at least one of the tower sections is an upper tower section of the concrete tower according to any one of claims 1-4.

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