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

Abstract

The present invention discloses a lower tower section of a concrete tower and a concrete tower having the same. The lower tower section of the concrete tower is annular or sheet-shaped. When the lower tower section is sheet-shaped, multiple lower tower sections can be assembled into an annular shape along the circumferential direction. The lower tower section is provided with a prestressed channel that passes through from top to bottom. A reserved threaded hole is provided on the top surface of the lower tower section at the top of at least one prestressed channel. The reserved threaded hole is used to connect a prestressed tendon connector, and the aperture of the threaded hole is larger than the diameter of the prestressed channel. According to the lower tower section of the concrete tower of the embodiment of the present invention, the prestressed tendon connector can be easily installed on the lower tower section through the reserved threaded hole. The size of the reserved threaded hole is large, which is convenient for setting a cushion device in the reserved threaded hole, which is beneficial to offset the stress concentration on the prestressed tendon connector and prevent local damage to the lower tower section.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation, and in particular to a lower 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 a lower 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 lower tower section, which is beneficial to the construction of the prestressed tendon connector.

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

[0005] According to the lower tower section of the concrete tower of the first aspect of the present invention, the lower tower section is a prefabricated part, and the lower tower section is annular or sheet-shaped. When the lower tower section is sheet-shaped, multiple lower tower sections can be assembled into a ring along the circumferential direction, and the lower tower section is provided with a prestressed channel running through from top to bottom. A reserved threaded hole is provided on the top surface of the lower tower section at the top of at least one of the prestressed channels, and the reserved threaded hole is used to connect a prestressed tendon connector, and the diameter of the threaded hole is larger than the diameter of the prestressed channel.

[0006] According to the lower tower section of the concrete tower of the embodiment of the present invention, by setting a reserved threaded hole, the prestressed tendon connector can be easily installed on the lower tower section. This lower tower section provides a new way to fix the prestressed tendon connector, that is, threaded connection to the lower tower section, so that the prestressed tendon connector is not easy to loosen during the installation process and later. The size of the reserved threaded hole is large, which is convenient for setting a cushion device in the reserved threaded hole, which is beneficial to offset the stress concentration on the prestressed tendon connector and prevent local damage to the lower tower section.

[0007] In addition, the lower 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 diameter of the threaded hole gradually increases in an upward direction.

[0009] In some embodiments of the present invention, a sleeve is pre-buried in the lower tower section, and a thread is provided on the inner peripheral wall of the sleeve to form the reserved threaded hole.

[0010] In some embodiments of the present invention, the lower tower section includes three sections from bottom to top: a thick top section, a thin-walled section and a transition section, the reserved threaded hole is arranged on the top wall of the thick top section, the thin-walled section is located below the thick top section, the thickness of the thin-walled section is less than the thickness of the thick top section, the transition section is connected between the thick top section and the thin-walled section, and the thickness of the transition section gradually increases from bottom to top.

[0011] Optionally, the slopes of the two side surfaces of the transition section are both less than or equal to 30 degrees.

[0012] Optionally, the thickness of the thick top section is 2-3 times the thickness of the thin wall section.

[0013] In some embodiments of the present invention, a corrugated pipe is pre-buried in the lower tower section, the corrugated pipe is arranged vertically, and the top of the corrugated pipe extends into the reserved threaded hole.

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

[0015] The present invention also provides a concrete tower having a lower 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 a lower 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 lower 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 2is 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 a lower 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 lower 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 the middle A part;

[0026] Figure 7 is a schematic structural diagram of a prestressed tendon connector according to an embodiment of the present invention.

[0027] Reference numerals:

[0028] The lower tower section of the concrete tower 100,

[0029] Thick top section 1, reserved threaded hole 11, thickness of thick top section M,

[0030] Thin-walled section 2, thickness of thin-walled section N,

[0031] Transition section 3, slope 31,

[0032] Bellows 4, prestressed channel 41,

[0033] Strengthen the reinforcement 5.

[0034] Tower section 200, positioning screw 10, positioning groove 20, leveling groove 30,

[0035] Prestressed tendon connector 300, body 310,

[0036] Concrete tower 1000,

[0037] Tower crane device 2000 and support arm structure 3000. DETAILED DESCRIPTION

[0038] 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.

[0039] A concrete tower 1000 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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 the arm structures 3000 at two locations. In this arrangement, the concrete tower 1000 can provide support force for the tower crane 2000, thereby preventing the tower crane 2000 from being bent or swinging greatly due to being too high.

[0044] 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.

[0045] In order to solve the above problems, the embodiment of the present invention adopts a lower tower section 100 of a concrete tower 1000, and cooperates with a prestressed tendon connector 300 to anchor the prestressed tendons. 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 vertical line. On the same lower tower section 100, multiple prestressed tendon connectors 300 can be set, and multiple prestressed tendon connectors 300 are set at intervals.

[0046] According to the concrete tower 1000 of the embodiment of the present invention, the stress concentration generated by the prestressed tendon connector 300 can be offset by the lower tower section 100, thereby preventing local damage and ensuring the stability of the concrete tower 1000.

[0047] Reference below Figure 1-Figure 6 The lower tower section 100 of a concrete tower 1000 according to an embodiment of the present invention is described.

[0048] like Figure 4 , Figure 5 and Figure 6 As shown, according to an embodiment of the present invention, the lower tower section 100 of the concrete tower 1000 is annular or sheet-shaped. When the lower tower section 100 is sheet-shaped, multiple lower tower sections 100 can be assembled into a ring along the circumferential direction. The lower tower section 100 is provided with a prestressed channel 41 that passes through from top to bottom. A reserved threaded hole 11 is provided on the top surface of the lower tower section 100 at the top of at least one prestressed channel 41, and the aperture of the threaded hole 11 is larger than the diameter of the prestressed channel 41.

[0049] That is to say, the prestressed tendon can pass through the prestressed channel 41 from one end of the lower tower section 100 to the other end of the lower tower section 100, and the prestressed tendon connector 300 can anchor one end of the prestressed tendon at the upper end of the lower tower section 100. In some examples, the lower tower section 100 is arranged at one-third of the height of the concrete tower 1000, and the other end of the prestressed tendon can be anchored at the bottom end of the concrete tower 1000, thereby applying prestress to the lower tower section 100. Of course, the lower tower section 100 can also be arranged at two-thirds of the height of the concrete tower 1000, which is not limited here.

[0050] In order to offset the stress concentration caused by the prestressed tendon connector 300 , a reserved threaded hole 11 is provided on the top surface of the lower tower section 100 , and the reserved threaded hole 11 cooperates with the prestressed tendon connector 300 to fix the prestressed tendon connector 300 .

[0051] When the reserved threaded hole 11 is matched with the prestressed tendon connector 300, the prestressed tendon connector 300 can be inserted into the reserved threaded hole 11, which is convenient for the installation of the prestressed tendon connector 300. The aperture of the reserved threaded hole 11 is larger than the diameter of the prestressed channel 41. Therefore, a bearing surface can be formed at the top of the prestressed channel 41 between the inner wall surface of the prestressed channel 41 and the inner wall surface of the reserved threaded hole 11 to bear the prestressed tendon connector 300. The reserved threaded hole 11 can also limit the prestressed tendon connector 300, so that the connection between the prestressed tendon connector 300 and the lower tower section 100 is more stable. Since the aperture of the threaded hole 11 is large, a cushion device can be set between the prestressed tendon connector 300 and the reserved threaded hole 11. When the prestressed tendon passes through the reserved threaded hole 11 and is tightened and fixed by the prestressed tendon connector 300, the force on the prestressed tendon connector 300 is first transmitted to the cushion device, and then transmitted to the tower through the buffering of the cushion device, which can protect the tower from damage.

[0052] Specifically, the prestressed tendon connector 300 includes a body 310 and a protective cover (not shown), and the prestressed tendon is connected to the body 310. The protective cover is formed in a funnel shape, with a large upper port and a small lower port, and the protective cover covers the bottom of the body 310. After the prestressed tendon is passed through the prestressed channel 41 of the lower tower section 100, the top of the prestressed tendon passes through the lower end of the protective cover and then extends into the prestressed tendon connector 300 and is connected to the body 310.

[0053] More specifically, if Figure 7 As shown, the body 310 includes an inner connecting column 311 and an outer connecting platform 312. The inner connecting column 311 is provided with an inner connecting hole, which axially penetrates the inner connecting column 311. The outer connecting platform 312 is formed by extending part of the outer peripheral wall of the inner connecting column 311 outward. The axial dimension of the outer connecting platform 312 is smaller than the axial dimension of the inner connecting column 311. The outer connecting platform 312 is provided with a plurality of spaced outer connecting grooves along the circumferential direction, which axially penetrate the outer connecting platform 312, and the outer connecting grooves are open on one side of the outer circumference of the body 310. Optionally, the diameter of the inner connecting column 311 gradually increases in the downward direction.

[0054] Specifically, the prestressed tendons passing through the lower tower section 100 are fixed to the inner connection holes of the inner connection columns 311 by means of extrusion anchors after extending to the prestressed tendon connector 300. The prestressed tendons passing through the upper part of the lower tower section 100 are fixed to the outer connection grooves of the outer connection platform 312 by means of extrusion anchors.

[0055] The lower tower section 100 may be processed in different ways according to actual production, transportation or installation requirements. Figure 4 As shown, the lower tower section 100 may be annular, and the annular lower tower section 100 is directly assembled to the tower. Figure 3As shown, the lower tower section 100 can also be in sheet form, and multiple sheet-shaped lower tower sections 100 are assembled into a ring along the circumferential direction, and then the lower tower section 100 of the ring structure is assembled onto the tower. There can be multiple lower tower sections 100 on the concrete tower 1000.

[0056] According to the lower tower section 100 of the concrete tower 1000 of the embodiment of the present invention, the prestressed tendon connector 300 can be easily installed on the lower tower section 100 through the reserved threaded hole 11. At the same time, the reserved threaded hole 11 is large in size, which is convenient for setting a cushion device in the reserved threaded hole 11, which is beneficial to offset the stress concentration on the prestressed tendon connector 300 and prevent local damage to the lower tower section 100.

[0057] In some embodiments of the present invention, the diameter of the threaded hole 11 gradually increases in the upward direction. That is, the threaded hole 11 is approximately formed into a cone, and the approximately inclined inner wall of the threaded hole 11 can increase the contact area between the prestressed tendon connector 300 and the threaded hole 11, that is, increase the contact area between the prestressed tendon connector 300 and the cushion device, so that the force bearing area of ​​the cushion device is increased, and the force borne by the cushion device within the same force bearing area is reduced, so that the force transmitted from the prestressed tendon connector 300 to the lower tower section 100 is dispersed, further improving the stability of the tower.

[0058] In some embodiments of the present invention, a sleeve is pre-buried in the lower tower section 100, and a thread is provided on the inner peripheral wall of the sleeve to form a reserved threaded hole 11. That is to say, the sleeve is pre-set on the casting mold when casting the lower tower section 100, so that after the lower tower section 100 is formed, the sleeve is fixed in the lower tower section 100, and the sleeve is arranged between the prestressed tendon connector 300 and the lower tower section 100, which can protect the lower tower section 100 from damage. Specifically, when the prestressed tendon connector 300 tightens and fixes the prestressed tendon, the prestressed tendon connector 300 transmits the force to the sleeve, and then transmits it to the lower tower section 100 through the buffering of the sleeve, which is conducive to the stability of the structure of the lower tower section 100. Optionally, a cushion device can be added to the sleeve to further protect the structure of the lower tower section 100. The prestressed tendon connector 300 may also be provided with threads, and the prestressed tendon connector 300 may be screwed onto the reserved threaded hole 11, which is conducive to the installation of the prestressed tendon connector 300 onto the lower tower section 100. When the prestressed tendon connector 300 is fixed on the lower tower section 100, the coordinated installation of the prestressed tendon and the prestressed tendon connector 300 is facilitated.

[0059] In some embodiments of the present invention, Figure 4 , Figure 5 and Figure 6As shown, the lower tower section 100 includes three sections from bottom to top: a thick top section 1, a thin-walled section 2 and a transition section 3. The reserved threaded hole 11 is arranged on the top wall of the thick top section 1, the thin-walled section 2 is located below the thick top section 1, the thickness N of the thin-walled section 2 is less than the thickness M of the thick top section 1, and the transition section 3 is connected between the thick top section 1 and the thin-walled section 2. The thickness of the transition section 3 gradually increases from bottom to top.

[0060] That is to say, the thick top section 1 is the thickest section in the lower tower section 100. Compared with other positions of the lower tower section 100, the thick top section 1 can bear the largest force. Therefore, the prestressed tendon connector 300 is installed on the top wall of the thick top section 1 in cooperation with the reserved threaded hole 11, which can further offset the force concentration caused by the prestressed tendon connector 300, which is beneficial to the stability of the structure of the lower tower section 100.

[0061] 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 lower tower section 100, this position of the lower tower section 100 is named thin-walled section 2.

[0062] The lower tower section 100 comprises a thin-wall section 2, a transition section 3 and a thick top section 1 from bottom to top. The thin-wall section 2 is connected to the lower tower section. One end of the prestressed tendon can be anchored at the lower end of the lower tower section 100, or it can enter the prestressed channel 41 of the lower tower section 100 from the prestressed channel 41 of the lower tower section.

[0063] The thickness of the transition section 3 gradually increases from bottom to top, that is, the thickness from the upper end of the thin-walled section 2 to the lower end of the thick top section 1 gradually decreases, thus avoiding stress concentration and damage between the thick top section 1 and the thin-walled section 2.

[0064] 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 top section 1 and the thin wall section 2. Therefore, the slopes 31 of the two side surfaces of the transition section 3 are preferably less than 30 degrees.

[0065] Optionally, the thickness M of the thick top section 1 is 2-3 times the thickness N of the thin-wall section 2, that is, the thickness M of the thick top section 1 can be 2 times the thickness N of the thin-wall section 2, and the thickness M of the thick top section 1 can be 3 times the thickness N of the thin-wall section 2. Increasing the thickness M of the thick top section 1 can enhance the structural strength of the lower tower section 100 in the thick top section 1 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 top section 1 is preferably 2-3 times the thickness of the thin-wall section 2.

[0066] In some embodiments of the present invention, a bellows 4 is pre-buried in the lower tower section 100, and the bellows 4 is arranged vertically, and the top of the bellows 4 extends into the reserved threaded hole 11. That is to say, the bellows 4 is first placed in the mold for producing the lower tower section 100 when the lower tower section 100 is produced. After the lower tower section 100 is cast, the bellows 4 is fixed in the lower 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 lower tower section 100 is cast. In this way, after the bellows 4 is fixed in the lower tower section 100, the prestressed channel 41 has a better effect of being connected up and down. The top of the bellows 4 extends into the reserved threaded hole 11 to ensure that the prestressed tendons can pass through the bellows 4 and enter the reserved threaded hole 11, and then the prestressed tendons cooperate with the prestressed connector to apply prestress to the lower tower section 100.

[0067] In some embodiments of the present invention, Figure 4 As shown, reinforcing bars 5 are embedded in the lower tower section 100, and the reinforcing bars 5 are arranged around the reserved threaded holes 11. That is, in order to further enhance the structural strength in the limited size structure of the lower tower section 100, reinforcing bars 5 can be arranged around the reserved threaded holes 11 when the lower tower section 100 is produced, and the concrete and the reinforcing bars 5 can form a reinforced concrete structure, which has good rigidity and strength and can effectively offset the stress generated by the prestressed tendon connector 300.

[0068] 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 threaded hole 11 and then extends downward, passing through the transition section 3 and part of the thin-wall section 2, so as to further strengthen the structural strength of the lower tower section 100.

[0069] 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.

[0070] Reference below Figure 4-Figure 6 The specific structure of the lower tower section 100 of a concrete tower 1000 according to a specific embodiment of the present invention is described.

[0071] like Figure 4-Figure 6 As shown, the lower tower section 100 of the concrete tower 1000 of this embodiment is annular, and includes a thick top section 1, a thin wall section 2 and a transition section 3. A sleeve is provided on the top surface of the thick top section 1, and a thread is provided on the inner circumferential wall of the sleeve to form a reserved threaded hole 11. In the upward direction, the aperture of the reserved threaded hole 11 gradually increases.

[0072] The thick top section 1 is located above the thin-walled section 2, and the thickness M of the thick top section 1 is twice the thickness N of the thin-walled section 2. The transition section 3 is connected between the thick top section 1 and the thin-walled section 2, and the thickness of the transition section 3 gradually increases from bottom to top. The slopes 31 of the two side surfaces of the transition section 3 are both equal to 30 degrees.

[0073] The lower tower section 100 is pre-buried with a bellows 4 and reinforcing bars 5. The bellows 4 is arranged vertically, and the top of the bellows 4 extends into the reserved threaded hole 11. The inner wall of the bellows 4 is formed into a reserved channel, and the aperture of the reserved threaded hole 11 is larger than the diameter of the reserved channel. The reinforcing bars 5 are arranged around the reserved threaded hole 11, and the reinforcing bars 5 extend downward and penetrate the transition section 3 and part of the thin-wall section 2.

[0074] 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.

[0075] 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. A lower tower section of a concrete tower, characterized in that: The lower tower section is a prefabricated part, and the lower tower section is in the shape of a ring or a sheet. When the lower tower section is in the shape of a sheet, a plurality of the lower tower sections can be assembled into a ring along the circumferential direction. The lower tower section is provided with a prestressed channel that passes through from top to bottom, and a reserved threaded hole is provided on the top surface of at least one of the prestressed channels, the reserved threaded hole is used to connect a prestressed tendon connector, and the diameter of the threaded hole is larger than the diameter of the prestressed channel; The lower tower section includes three sections from bottom to top: A thick top section, wherein the reserved threaded hole is arranged on the top wall of the thick top section, and the prestressed tendon connector is installed on the top wall of the thick top section in cooperation with the reserved threaded hole to offset the force concentration generated by the prestressed tendon connector; A thin-walled section, wherein the thin-walled section is located below the thick top section, and the thickness of the thin-walled section is smaller than the thickness of the thick top section; A transition section, wherein the transition section is connected between the thick top section and the thin wall section, and the thickness of the transition section gradually increases from bottom to top; the slopes of the surfaces on both sides of the transition section are both less than or equal to 30 degrees; The thickness of the thick top section is 2-3 times the thickness of the thin wall section.

2. The lower tower section of the concrete tower according to claim 1, characterized in that: The diameter of the threaded hole gradually increases in the upward direction.

3. The lower tower section of the concrete tower according to claim 1, characterized in that: A sleeve is pre-buried in the lower tower section, and a thread is arranged on the inner peripheral wall of the sleeve to form the reserved threaded hole.

4. The lower tower section of the concrete tower according to claim 1, characterized in that: A corrugated pipe is pre-buried in the lower tower section. The corrugated pipe is arranged vertically, and the top of the corrugated pipe extends into the reserved threaded hole.

5. The lower tower section of the concrete tower according to claim 1, characterized in that: Reinforcement bars are embedded in the lower tower section, and the reinforcement bars are arranged around the reserved threaded holes.

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

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