Self-lifting tower and its construction process

Abstract

The application discloses a self-lifting tower drum and a construction process thereof. The construction process of the self-lifting tower drum sets the self-lifting tower drum into two sections, and realizes self-lifting of the upper tower drum section by setting a lifting device on the top of the lower tower drum section. After the lifting of the upper tower drum section is completed, the lower tower drum section is prestressed and tensioned by using the lifting rib as a prestressed rib, so that the construction cost of the tower drum is saved. The assembly of the tower drum is completed by one-time lifting, and the overall structure and the construction process are simplified. The actual height of the self-lifting tower drum constructed by the construction process provided by the application can reach more than 200 meters.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to a self-lifting tower and its construction process. Background Technology

[0002] As the power generation efficiency of wind turbines continues to improve, the blade length of wind turbines is increasing, leading to a corresponding increase in the height and cross-sectional dimensions of the corresponding wind turbine towers. Conventional concrete towers are constructed by building individual tower sections or segments on the ground, then hoisting and assembling them on-site before installing the wind turbine. For towers exceeding 100 meters in height, specialized equipment and high-altitude operations are required, resulting in extremely high costs and difficulties. To address the hoisting challenges of ultra-tall towers, Estecyo developed a self-lifting technology that divides the tower into several sections from the inside out, lifting each section separately, thus reducing construction difficulty. However, Estecyo's self-lifting technology, by requiring the tower to be divided into sections from the inside out to reduce the operational difficulty of the lifting device, leads to a more complex overall structure and increased construction complexity. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a construction process for a self-lifting tower.

[0004] Embodiments of the present invention also propose a self-lifting tower.

[0005] In the construction process of the self-lifting tower provided in the embodiments of the present invention, the self-lifting tower includes a tower foundation and a tower body disposed on the tower foundation. The tower body includes a lower tower section and an upper tower section assembled and connected using self-lifting technology. The construction process includes the following steps:

[0006] S10: Construct the tower foundation, build the upper tower section on the tower foundation, and prestress the upper tower section;

[0007] S20: Construct the lower tower section on the foundation of the tower section, so that the lower tower section fits over the upper tower section;

[0008] S30: A lifting device is provided at the top of the lower tower section, and a lifting rib is provided. One end of the lifting rib is connected to the lifting device, and the other end extends into the lower tower section and extends downward to anchor at the bottom of the upper tower section.

[0009] S40: The lifting device operates, and under the action of the lifting device, the upper tower section moves upward to achieve self-lifting until the upper tower section reaches the preset position, and the upper tower section and the lower tower section are fixed to each other to complete the assembly.

[0010] S50: The lower tower section is subjected to internal or external prestressing tension using the lifting ribs.

[0011] The self-lifting tower construction process provided in this invention involves dividing the self-lifting tower into two sections. The upper tower section is self-lifted by installing a lifting device at the top of the lower section. After the upper section is lifted, lifting ribs can be used as prestressing tendons for the lower section, thus saving on construction costs. Furthermore, the tower assembly is completed in a single lifting operation, simplifying the overall structure and construction process. The self-lifting tower constructed using this invention can reach a height of over 200 meters.

[0012] In some embodiments, step S10 further includes the step of installing a jacking device on the tower foundation after the tower foundation construction is completed;

[0013] Before step S30, the method further includes step S301, which involves using the lifting device to lift the upper tower section to its initial position so that there is a certain distance between the bottom of the upper tower section and the tower foundation.

[0014] In some embodiments, the lifting device is a lifting jack, and / or the jacking device is a jacking jack.

[0015] In some embodiments, one of the upper tower section and the lower tower section is provided with a first limiting pin, and the other is provided with a first limiting hole. The first limiting pin is detachably engaged in the first limiting hole to fix the upper tower section in the initial position.

[0016] Step S301 further includes: after the upper tower section reaches the initial position, inserting the first limiting pin into the first limiting hole;

[0017] Step S40 further includes: disengaging the first limiting pin from the first limiting hole before lifting.

[0018] In some embodiments, the upper tower section is provided with the first limiting pin, the inner wall of the lower tower section is provided with the first limiting hole, and the inner wall of the lower tower section is also provided with a second limiting hole, the second limiting hole being located above the first limiting hole, and the first limiting pin being detachably engaged in the second limiting hole to fix the upper tower section at the preset position.

[0019] Step S40 further includes inserting the first limiting pin into the second limiting hole after the upper tower section reaches the preset position.

[0020] In some embodiments, the top of the lower tower section is provided with a second limiting pin, and the upper tower section is provided with a third limiting hole. The second limiting pin can be detachably engaged in the third limiting hole to fix the upper tower section at the preset position.

[0021] Step S40 further includes inserting the second limiting pin into the third limiting hole after the upper tower section reaches the preset position.

[0022] In some embodiments, the bottom of the upper tower section has a first bracket, and the top of the lower tower section has a second bracket. The first bracket has a first lifting channel, and the second bracket has a second lifting channel.

[0023] In step S30, the other end of the lifting rib passes through the second lifting channel and the first lifting channel from top to bottom and is anchored to the bottom of the first corbel.

[0024] In step S40, when the upper tower section reaches the preset position, the top of the first bracket abuts against the bottom of the second bracket.

[0025] In some embodiments, step S40 further includes, when the upper tower section reaches the preset position, the bottom of the upper tower section and the top of the lower tower section are connected by anchor bolts or by post-cast strips.

[0026] In some embodiments, an internal prestressing channel is provided in the side wall of the lower tower section, the internal prestressing channel opens at the top of the lower tower section, and the tower foundation is provided with an anchoring channel communicating with the internal prestressing channel.

[0027] In step S40, as the self-lifting process proceeds, one end of the lifting rib gradually moves down through the opening along the internal prestressed channel and passes through the anchoring hole.

[0028] In step S50, one end of the lifting rib is anchored below the anchoring duct, and then the lifting rib is used to perform internal prestressing tensioning on the lower tower section. The lifting rib is then anchored at the top of the lower tower section.

[0029] In some embodiments, step S50 further includes: after the self-lifting is completed, cutting off the lifting rib, so that one section of the lifting rib is used as a prestressing rib in the prestressing channel inside the body, and anchoring the top of the other section of the lifting rib to the top of the lower tower section to connect the top of the lower tower section and the bottom of the upper tower section.

[0030] In another embodiment of the present invention, the self-lifting tower is constructed using the construction process of the self-lifting tower described in any of the above embodiments.

[0031] In some embodiments, the height of the upper tower section is 20-120 meters, and the height of the lower tower section is 20-120 meters.

[0032] In some embodiments, the upper tower section is a conical section, and the lower tower section is a straight section. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the self-lifting tower before self-lifting, provided in an embodiment of the present invention.

[0034] Figure 2 This is a schematic diagram of the assembled self-lifting tower provided in an embodiment of the present invention.

[0035] Figure 3 This is the construction process of the self-lifting tower provided in the embodiments of the present invention. Figure 1 .

[0036] Figure 4 yes Figure 3 A partial schematic diagram at point B in the middle.

[0037] Figure 5 This is the construction process of the self-lifting tower provided in the embodiments of the present invention. Figure 2 .

[0038] Figure 6 yes Figure 5 A partial schematic diagram at point C.

[0039] Figure 7 This is the construction process of the self-lifting tower provided in the embodiments of the present invention. Figure 3 .

[0040] Figure 8 yes Figure 7 A partial schematic diagram at point D in the middle.

[0041] Figure 9 yes Figure 7 A partial schematic diagram at point E.

[0042] Figure 10 This is the construction process of the self-lifting tower provided in the embodiments of the present invention. Figure 4 .

[0043] Figure 11 yes Figure 10 A partial schematic diagram at point F.

[0044] Figure 12 This is a completed construction diagram of the self-lifting tower provided in an embodiment of the present invention.

[0045] Figure 13 yes Figure 12 A partial schematic diagram at point G in the middle.

[0046] Figure 14 yes Figure 2 A partial schematic diagram of point A in the middle.

[0047] Figure label:

[0048] Self-lifting tower 100

[0049] Tower foundation 1, anchoring duct 11, lower tower section 2, first limiting hole 21, second limiting hole 22, second limiting pin 23, internal prestressing channel 24, second corbel 201, upper tower section 3, first limiting pin 31, third limiting hole 32, first corbel 301, lifting rib 4, lifting device 5, steel tower section 6. Detailed Implementation

[0050] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0051] The following is based on Figures 1-14 The construction process of the self-lifting tower 100 provided in the embodiments of the present invention is described.

[0052] like Figure 2 As shown, the self-lifting tower 100 includes a tower foundation 1 and a tower body mounted on the tower foundation 1. The tower body includes a lower tower section 2 and an upper tower section 3, which are assembled and connected using self-lifting technology. The lower tower section 2 is located below the upper tower section 3, and the bottom of the upper tower section 3 is connected to the top of the lower tower section 2. The tower foundation 1 supports the lower tower section 2 and the upper tower section 3. A portion of the tower foundation 1 may be buried underground, or the entire tower foundation 1 may be buried underground, to ensure the structural stability of the tower.

[0053] The construction process of a self-lifting tower 100 includes the following steps:

[0054] S10: As Figure 3 and Figure 4As shown, a tower foundation 1 is constructed, and an upper tower section 3 is built on the tower foundation 1 and prestressed on the upper tower section 3.

[0055] S20: As Figure 3 and Figure 4 As shown, a lower tower section 2 is constructed on the tower foundation 1, so that the lower tower section 2 is fitted with the upper tower section 3;

[0056] S30: As Figure 7-9 As shown, a lifting device 5 is installed at the top of the lower tower section 2, and a lifting rib 4 is installed. One end of the lifting rib 4 is connected to the lifting device 5, and the other end extends into the lower tower section 2 and extends downward to be anchored to the bottom of the upper tower section 3.

[0057] S40: As Figure 10-11 As shown, the lifting device 5 operates. Under the action of the lifting device 5 and the lifting rib 4, the upper tower section 3 moves upward to achieve self-lifting until the upper tower section 3 reaches the preset position. That is to say, under the lifting action of the lifting rib 4, the upper tower section 3 moves from the initial position to the preset position. After the upper tower section 3 reaches the preset position, the upper tower section 3 and the lower tower section 2 are fixed to each other to complete the assembly.

[0058] S50: such as Figures 12-13 As shown, the lifting rib 4 is used to perform internal or external prestressing tensioning on the lower tower section 2. That is, after using the lifting rib 4 to lift the upper tower section 3, it can be reused as a prestressing rib for the lower tower section 2 to perform prestressing tensioning on the lower tower section 2. Optionally, the lifting rib 4 can be used as an internal prestressing rib or an external prestressing rib for the lower tower section 2.

[0059] The self-lifting tower construction process provided in this invention involves dividing the self-lifting tower into two sections. The upper tower section is self-lifted by installing a lifting device at the top of the lower section. After the upper section is lifted, lifting ribs can be used as prestressing tendons for the lower section, thus saving on construction costs. Furthermore, the tower assembly is completed in a single lifting operation, simplifying the overall structure and construction process. The self-lifting tower constructed using this invention can reach a height of over 200 meters.

[0060] In step S10, the prestressing tensioning step of the upper tower section 3 specifically includes prestressing the upper tower section 3 using prestressing tendons. Specifically, the upper tower section 3 can be prestressed using either external or internal prestressing tensioning methods; this invention does not impose any limitations.

[0061] In step 20, such as Figure 3 and Figure 4 As shown, the bottom of the lower tower section 2 is supported on the top of the tower foundation 1, and the lower tower section 2 is fitted with the upper tower section 3, with a certain gap between them to facilitate the lifting of the upper tower section 3.

[0062] In some embodiments, step S10 further includes installing a jacking device (not shown in the figure) on the tower foundation 1 after the tower foundation 1 is constructed. That is, before constructing the upper tower section 3, a jacking device is installed on the tower foundation 1, and the upper tower section 3 is constructed above the jacking device. The jacking device is used for later jacking of the upper tower section 3. Before step S30, a step S301 is included, in which the jacking device is used to lift the upper tower section 3 to its initial position. Specifically, in step S301, the jacking device acts on the top of the upper tower section 3, pushing the upper tower section 3 upwards so that the upper tower section 3 is lifted a certain distance to the desired position. Figure 5 and Figure 6 The initial position shown is such that there is a certain distance between the bottom of the upper tower section 3 and the tower foundation 1, so that the lifting rib 4 can be anchored to the bottom of the upper tower section 3 later.

[0063] Optionally, the lifting device is a lifting jack.

[0064] In some embodiments, step S301 further includes fixing the upper tower section 3, which has been lifted to the initial position, so that the upper tower section 3 and the lower tower section 2 are relatively fixed to each other to facilitate subsequent installation operations. The relative fixing methods between the upper tower section 3 and the lower tower section 2 can be various, such as limit pin connection, anchor bolt connection, etc.

[0065] In some optional embodiments, the upper tower section 3 and the lower tower section 2 are connected by a limiting pin. One of the upper tower section 3 and the lower tower section 2 is provided with a first limiting pin, and the other is provided with a first limiting hole. The first limiting pin can be disengaged and engaged in the first limiting hole to fix the upper tower section 3 in the initial position. That is, when the first limiting pin is engaged in the first limiting hole, the upper tower section 3 and the lower tower section 2 are vertically limited and fixed to each other. When the first limiting pin is disengaged from the first limiting hole, the upper tower section 3 and the lower tower section can undergo relative displacement in the vertical direction.

[0066] Step S301 also includes inserting the first limiting pin into the first limiting hole after the upper tower section 3 reaches the initial position, so that the upper tower section 3 and the lower tower section 2 are relatively fixed.

[0067] Step S40 further includes: disengaging the first limiting pin from the first limiting hole before lifting, so that the upper tower section 3 and the lower tower section can be relatively displaced in the vertical direction, thereby avoiding affecting the lifting of the upper tower section 3.

[0068] exist Figures 1-14 In the illustrated embodiment, the upper tower section 3 is provided with a first limiting pin 31, and the inner wall of the lower tower section 2 is provided with a first limiting hole 21. For example... Figure 6 As shown, the first limiting pin 31 is located at the bottom of the upper tower section 3 and is radially retractable so as to extend into or out of the first limiting hole 21 on the inner wall of the lower tower section 2.

[0069] Preferably, there are multiple first limiting pins 31 and one-to-one corresponding first limiting holes 21. The first limiting holes 21 are spaced out along the circumferential direction at the bottom of the upper tower section 3, so that the fixed relationship between the upper tower section 3 and the lower tower section 2 when they reach the initial position is more stable.

[0070] Of course, in other alternative embodiments, the first limiting pin can be disposed inside the lower tower section 2, and the first limiting hole can be disposed on the corresponding inner wall of the upper tower section 3. This invention does not limit this.

[0071] Furthermore, the step of "fixing the upper tower section 3 and the lower tower section 2, which are raised to a preset position" in step S40 can be specifically achieved by using a limiting pin for fixed connection.

[0072] like Figure 10 and Figure 11 As shown, the inner wall of the lower tower section 2 is also provided with a second limiting hole 22. The second limiting hole 22 is located above the first limiting hole 21, and the second limiting hole 22 is close to the top of the lower tower section 2, while the first limiting hole 21 is close to the bottom of the lower tower section 2. The first limiting pin 31 can also be disengaged and engaged in the second limiting hole 22 to fix the upper tower section 3 in a preset position. That is, when the upper tower section 3 reaches the preset position, the first limiting pin 31 is engaged in the second limiting hole 22, and the upper tower section 3 and the lower tower section 2 are vertically limited and mutually fixed. When the first limiting pin 31 is disengaged from the second limiting hole 22, the upper tower section 3 and the lower tower section can undergo relative displacement in the vertical direction.

[0073] Therefore, step S40 also includes, for example Figure 11 As shown, after the upper tower section 3 reaches the preset position, the first limiting pin 31 is inserted into the second limiting hole 22 to fix the upper tower section 3 and the lower tower section 2 relative to each other, thus completing the assembly of the upper tower section 3 and the lower tower section 2.

[0074] In some embodiments, in order to further improve the structural stability and structural strength of the self-lifting tower 100, such as... Figure 11 , 13As shown in Figure 14, the top of the lower tower section 2 is also provided with a second limiting pin 23, and the upper tower section 3 is provided with a third limiting hole 32. The second limiting pin 23 can be detachably engaged in the third limiting hole 32 to fix the upper tower section 3 in a preset position.

[0075] Therefore, step S40 also includes, for example Figure 11 and 14 As shown, after the upper tower section reaches the preset position, the second limiting pin 23 is inserted into the third limiting hole 32 to further fix the upper tower section 3 and the lower tower section 2 relative to each other, thereby improving the stability of the assembled structure.

[0076] In some embodiments, such as Figure 3-12 As shown, the upper tower section 3 includes a first cylinder and a first bracket 301. The first bracket 301 is located at the bottom of the first cylinder and protrudes outward relative to the first cylinder. The lower tower section 2 includes a second cylinder and a second bracket 201. The second bracket 201 is located at the top of the second cylinder and protrudes inward relative to the second cylinder. The first bracket 301 has a first lifting channel, and the second bracket 201 has a second lifting channel. The first bracket 301 and the second bracket 201 are vertically opposite each other, and the first lifting channel and the second lifting channel are vertically opposite each other.

[0077] In step S30, as Figures 7-9 The lifting rib 4 passes through the second lifting channel of the second bracket 201 and the first lifting channel of the first bracket 301 from top to bottom, and the top end of the lifting rib 4 is connected to the lifting device 5 set at the top of the lower tower section 2, and the bottom end of the lifting rib 4 is anchored to the bottom of the first bracket 301.

[0078] Furthermore, such as Figure 11 As shown, in step S40, when the upper tower section 3 reaches the preset position, the top of the first bracket 301 abuts against the bottom of the second bracket 201, that is, the top of the upper tower section 3 at the preset position abuts against the bottom of the second bracket 201, so that the second bracket 201 can accurately position the lifting position of the upper tower section 3.

[0079] Preferably, in step S30, there are multiple lifting ribs 4, spaced apart circumferentially. Correspondingly, there are multiple first and second lifting channels, each corresponding to the previous one. The lifting ribs 4 pass through a first lifting channel and a corresponding second lifting channel vertically from top to bottom, with their bottom ends anchored to the bottom of the first bracket 301 and their top ends connected to the corresponding lifting device 5. This improves the stability of the upper tower section 2 during lifting and ensures the verticality of the upper tower section 2. Furthermore, as... Figure 11As shown, the top of the lower tower section 2 is equipped with multiple lifting devices 5. Each lifting device 5 operates synchronously, maintaining the same lifting rate, and together pulls the rising tower section 3 upward.

[0080] Optionally, the lifting rib 4 can be made of steel strand, which has high strength and can ensure construction safety.

[0081] Optionally, the lifting device 5 is a lifting jack, specifically a through-type jack, characterized by its ability to pull the lifting rib 4 upwards, simultaneously lifting the upper tower section 3 upwards. The lifting rib 4 passes through the lifting jack. The power source for the lifting jack is preferably a hydraulic pump station, where the relative movement of the piston and cylinder along the lifting rib 4 causes the load to rise (continuously translate) or descend appropriately.

[0082] In some embodiments, after the upper tower section 3 reaches the preset position and is fixed in step S40, it is necessary to further connect the bottom of the upper tower section 3 with the top of the lower tower section 2. The connection between the bottom of the upper tower section 3 and the top of the lower tower section 2 can be in various ways, such as using anchor bolts or post-cast strips.

[0083] Therefore, step S40 also includes that when the upper tower section 3 reaches the preset position, the bottom of the upper tower section 3 and the top of the lower tower section 2 are connected by anchor bolts or by post-cast strips.

[0084] Specifically, in some embodiments, the bottom of the upper tower section 3 and the top of the lower tower section 2 are connected by anchor bolts. The anchor bolts penetrate the second bracket 201 of the lower tower section 2 and the first bracket 301 of the upper tower section 3 to anchor the upper tower section 3 and the lower tower section 2, ensuring the connection stability between the upper tower section 3 and the lower tower section 2 and resisting strong external forces.

[0085] In other embodiments, the bottom of the upper tower section 3 and the top of the lower tower section 2 are connected by a post-cast strip. A post-cast strip refers to a concrete strip of a certain width, pre-reserved in structures such as beams, slabs (including foundation slabs), and walls, which is poured after a certain period of time to accommodate changes in ambient temperature, concrete shrinkage, and uneven structural settlement. Specifically, after the upper tower section 3 is raised to a preset position, the flange of the upper tower section 3 serves as the bottom slab for the post-cast strip, the end face of the lower tower section 2 serves as the top slab for the post-cast strip, and the outer wall of the upper tower section 3 and the inner wall of the lower tower section 2 serve as the side slabs for the post-cast strip, thereby connecting the upper tower section 3 and the lower tower section 2 through the post-cast strip.

[0086] It should be noted that, in addition to using anchoring connection and post-cast strip connection respectively, both can be used at the same time. That is, the upper tower section 3 and the lower tower section 2 are anchored together first, and then the concrete strip is poured. The combination of the two methods makes the connection more stable, can resist stronger external forces, and can increase the service life of the self-lifting tower 100.

[0087] exist Figures 7-13 In the illustrated embodiment, step S50 specifically utilizes the lifting rib 4 to perform internal prestressing tensioning on the lower tower section 2. That is, after the upper tower section 3 is lifted using the lifting rib 4, the lifting rib 4 acts as a prestressing tendon for the lower tower section 2, performing internal prestressing tensioning on the lower tower section 2.

[0088] Specifically, such as Figure 8 As shown, an internal prestressing channel 24 is provided in the side wall of the lower tower section 2. The internal prestressing channel 24 runs through the lower tower section in the vertical direction and has openings at both the top and bottom of the lower tower section 2. Figure 9 As shown, the tower foundation 1 is provided with anchoring ducts 11 that communicate with the prestressing channel 24 inside the tower, such as... Figures 8-11 As shown, one end of the lifting rib 4 extends into the prestressing channel 24 inside the body through the top opening. In step S40, as the self-lifting process proceeds, the end of the lifting rib 4 gradually moves downwards along the prestressing channel 24 through the opening and passes through the anchoring hole 11. After the self-lifting is completed, one end of the lifting rib 4 is anchored below the anchoring hole 11. Subsequently, the lifting rib 4 is used to perform prestressing tensioning on the lower tower section 2, as shown... Figure 13 As shown, the lifting rib 4 is anchored at the top of the lower tower section 2.

[0089] Furthermore, such as Figure 12 and Figure 13 After the lifting is completed, the lifting device 5 can be selectively removed, and then the top of the lifting rib 4 can be cut off, so that one section of the lifting rib 4 is used as a prestressing rib and fits in the prestressing channel 24 inside the body, and the top of the other section of the lifting rib 4 is anchored to the top of the lower tower section 2, which is used to connect the top of the lower tower section 2 (second bracket 201) and the bottom of the upper tower section 3 (first bracket 301).

[0090] By using the lifting rib 4 as the prestressing rib of the lower tower section 2, the lower tower section 2 is prestressed, which saves the construction cost of the tower.

[0091] An embodiment of the present invention also provides a self-lifting tower 100, which is a self-lifting tower 100 constructed using the construction process of the self-lifting tower in any of the above embodiments.

[0092] Optionally, the height of the upper tower section 3 is 20-120 meters, and the height of the lower tower section 2 is 20-120 meters. For example... Figure 1 As shown, the height of the upper tower section 3 can be higher than the height of the lower tower section 2.

[0093] Optionally, the height of the self-lifting tower 100 is greater than 180 meters. More optionally, the self-lifting tower 100 is an ultra-high tower with a height greater than 200 meters.

[0094] Optionally, both the lower tower section 2 and the upper tower section 3 are concrete tower sections. Compared with traditional steel towers, concrete towers have better performance in terms of safety, load-bearing capacity, and stability, and the construction cost of concrete towers is low.

[0095] In some embodiments, the upper tower section 3 is a conical section, meaning that the cross-sectional area of ​​the upper tower section 3 gradually decreases from bottom to top to form a conical structure. The lower tower section 2 is a straight section, meaning that the cross-sectional area of ​​the lower tower section 2 is the same from bottom to top.

[0096] Optionally, both the upper tower section 3 and the lower tower section 2 include multiple tower sections stacked sequentially in the vertical direction. Each tower section includes tower segments connected end-to-end along the circumference of the tower section. In other words, both the upper tower section 3 and the lower tower section 2 are composed of multiple tower sections. Before installing the upper tower section 3 and the lower tower section 2, tower segments are prefabricated. Multiple tower segments are connected end-to-end to form multiple tower sections, and these multiple tower sections are stacked sequentially in the vertical direction to form the upper tower section 3 and the lower tower section 2. The prefabricated tower segments can be solid or hollow.

[0097] In actual production and processing, different prefabrication methods can be adopted for tower sections of different cross-sectional sizes. For example, for larger tower sections, the methods described above can be used for assembly, which helps reduce transportation and construction difficulties. For smaller tower sections, in addition to the above construction methods, they can also be prefabricated into annular tower sections in the prefabrication plant and then transported to the site for hoisting and installation, thereby simplifying the construction process and ensuring construction quality. This approach not only reduces construction costs but also helps improve construction efficiency.

[0098] Alternatively, the cross-sectional shape of the upper tower section 3 can be circular, octagonal, or dodecagonal. Furthermore, the cross-sectional shape of the lower tower section 2 can be circular, octagonal, or dodecagonal.

[0099] According to the tower construction requirements, an adhesive layer needs to be installed between every two adjacent tower sections. This adhesive layer, by evenly and densely filling the horizontal joints between adjacent tower sections, ensures the connection strength between them, guaranteeing the overall strength, quality, and sealing of the tower. During construction, each tower section needs to be readjusted after it is erected to ensure that each section is placed horizontally, preventing tilting and improving the overall quality of the tower's construction.

[0100] In some embodiments, such as Figure 3 As shown, the self-lifting tower 100 also includes a steel tower section 6, which is located above the upper tower section 3. The bottom of the steel tower section 6 is connected to the top of the upper tower section 3. The steel tower section 6 is used to support the wind turbine, which is installed at the top of the tower (not shown). The turbine head can be directly fixed to the top of the steel tower section 6, or it can be fixed to the top of the steel tower section 6 through a support frame. The steel tower section 6 can be installed after the upper tower section 3 is constructed.

[0101] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0102] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0103] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0104] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0105] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0106] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A construction process for a self-lifting tower, characterized in that, The self-lifting tower includes a tower foundation and a tower body mounted on the tower foundation. The tower body includes a lower tower section and an upper tower section assembled and connected using self-lifting technology. The construction process includes the following steps: S10: Construct the tower foundation, build the upper tower section on the tower foundation, and prestress the upper tower section; S20: Construct the lower tower section on the foundation of the tower section, so that the lower tower section fits over the upper tower section; S30: A lifting device is provided at the top of the lower tower section, and a lifting rib is provided. One end of the lifting rib is connected to the lifting device, and the other end extends into the lower tower section and extends downward to anchor at the bottom of the upper tower section. S40: The lifting device operates, and under the action of the lifting device, the upper tower section moves upward to achieve self-lifting until the upper tower section reaches the preset position, and the upper tower section and the lower tower section are fixed to each other to complete the assembly; S50: The lower tower section is prestressed internally or externally using the lifting ribs. After the upper tower section is lifted using the lifting ribs, the lower tower section is prestressed again using the prestressing ribs used as the lower tower section. The assembly of the upper tower section and the lower tower section is completed through one lifting operation.

2. The construction process of the self-lifting tower according to claim 1, characterized in that, Step S10 also includes the step of installing a jacking device on the tower foundation after the tower foundation construction is completed; Before step S30, the method further includes step S301, which involves using the lifting device to lift the upper tower section to its initial position so that there is a certain distance between the bottom of the upper tower section and the tower foundation.

3. The construction process of the self-lifting tower according to claim 2, characterized in that, The lifting device is a lifting jack, and / or the jacking device is a jacking jack.

4. The construction process of the self-lifting tower according to claim 2, characterized in that, One of the upper tower section and the lower tower section is provided with a first limiting pin, and the other is provided with a first limiting hole. The first limiting pin is detachably engaged in the first limiting hole to fix the upper tower section in the initial position. Step S301 further includes: when the upper tower section reaches the initial position, inserting the first limiting pin into the first limiting hole. Step S40 further includes: disengaging the first limiting pin from the first limiting hole before lifting.

5. The construction process of the self-lifting tower according to claim 4, characterized in that, The upper tower section is provided with the first limiting pin, the inner wall of the lower tower section is provided with the first limiting hole, and the inner wall of the lower tower section is also provided with a second limiting hole. The second limiting hole is located above the first limiting hole, and the first limiting pin can be detachably engaged in the second limiting hole to fix the upper tower section in the preset position. Step S40 further includes inserting the first limiting pin into the second limiting hole after the upper tower section reaches the preset position.

6. The construction process of the self-lifting tower according to claim 4 or 5, characterized in that, The lower tower section is provided with a second limiting pin at its top, and the upper tower section is provided with a third limiting hole. The second limiting pin can be detachably engaged in the third limiting hole to fix the upper tower section in the preset position. Step S40 further includes inserting the second limiting pin into the third limiting hole after the upper tower section reaches the preset position.

7. The construction process of the self-lifting tower according to claim 1, characterized in that, The upper tower section has a first bracket at its bottom, and the lower tower section has a second bracket at its top. The first bracket has a first lifting channel, and the second bracket has a second lifting channel. In step S30, the other end of the lifting rib passes through the second lifting channel and the first lifting channel from top to bottom and is anchored to the bottom of the first corbel. In step S40, when the upper tower section reaches the preset position, the top of the first bracket abuts against the bottom of the second bracket.

8. The construction process of the self-lifting tower according to claim 1 or 7, characterized in that, Step S40 further includes that when the upper tower section reaches the preset position, the bottom of the upper tower section and the top of the lower tower section are connected by anchor bolts or by post-cast strips.

9. The construction process of the self-lifting tower according to claim 1, characterized in that, The lower tower section has an internal prestressing channel in its side wall, the internal prestressing channel opens at the top of the lower tower section, and the tower foundation has an anchoring channel that communicates with the internal prestressing channel. In step S40, as the self-lifting process proceeds, one end of the lifting rib gradually moves down through the opening along the internal prestressed channel and passes through the anchoring hole. In step S50, one end of the lifting rib is anchored below the anchoring duct, and then the lifting rib is used to perform internal prestressing tensioning on the lower tower section. The lifting rib is then anchored at the top of the lower tower section.

10. The construction process of the self-lifting tower according to claim 9, characterized in that, Step S50 further includes: after the self-lifting is completed, cutting the lifting rib, so that one section of the lifting rib is used as a prestressing rib in the prestressing channel inside the body, and anchoring the top of the other section of the lifting rib to the top of the lower tower section to connect the top of the lower tower section and the bottom of the upper tower section.

11. A self-lifting tower, characterized in that, The self-lifting tower is a self-lifting tower constructed using the construction process of the self-lifting tower as described in any one of claims 1-10.

12. The self-lifting tower according to claim 11, characterized in that, The height of the upper tower section is 20-120 meters, and the height of the lower tower section is 20-120 meters.

13. The self-lifting tower according to claim 11, characterized in that, The upper tower section is a conical section, and the lower tower section is a straight section.

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