Tower tube segment vertical seam connection method and tower tube prefabricated pipe section

Abstract

The present invention discloses a method for connecting tower tube segments with vertical seams and a prefabricated tower tube segment. The method is used to connect a first prefabricated tube segment and a second prefabricated tube segment in the circumferential direction to assemble a tower tube segment. Pre-embedded mounting components and pre-embedded nuts are used, and connecting bolts are used to initially interconnect the two tube segments during connection. Grouting material is then used to fill the vertical seams and gaps to further strengthen the connection. The connection is strong and reliable, giving the tower tube segment strong structural stability and improving the load-bearing capacity of the wind turbine tower.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power towers, and in particular to a method for connecting tower tube segments with vertical seams and a prefabricated tower tube section. Background Art

[0002] In recent years, China has vigorously developed new energy projects, with wind power being a clean, pollution-free, and renewable energy source. Wind power generation has been widely adopted due to its high power generation capacity, stable turbine operation, and mature manufacturing technology. The tower is a key load-bearing component in wind power generation facilities. Wind turbine towers are tall structures, typically quite tall, and are subject to complex and variable loads such as large thrust, bending moments, and torque. Therefore, the structural stability of the tower is crucial to the proper operation and safety of wind power generation equipment.

[0003] Currently, the most common wind turbine tower is an assembled wind turbine tower, which is composed of multiple prefabricated pipe sections and is installed by hoisting them segment by segment. In order to facilitate transportation, the prefabricated pipe sections are spliced ​​together in the circumferential direction using multiple prefabricated pipe sections. In related technologies, the splicing between adjacent pipe sections usually adopts bolts, grouting, etc. The reliability of the connection method is insufficient, which affects the structural stability of the wind turbine tower and may even lead to safety accidents in severe cases. Summary of the Invention

[0004] The present invention aims to at least partially address one of the technical problems in the related art. To this end, embodiments of the present invention provide a method for connecting vertical seams of tower segments. Embodiments of the present invention also provide a prefabricated tower segment connected using this method.

[0005] The tower tube segment vertical seam connection method of the embodiment of the present invention is used to connect a prefabricated first tube segment and a second tube segment in the circumferential direction, wherein a plurality of first pre-embedded installation components and a plurality of first pre-embedded nuts are pre-embedded in the first tube segment, and a plurality of second pre-embedded installation components and a plurality of second pre-embedded nuts are pre-embedded in the second tube segment, a first installation cavity is formed inside the first pre-embedded installation component, one end of the first installation cavity is open toward the inner side or outer side of the first tube segment, and the other end is open toward the vertical end face of the first tube segment, a second installation cavity is formed inside the second pre-embedded installation component, one end of the second installation cavity is open toward the inner side or outer side of the second tube segment, and the other end is open toward the vertical end face of the second tube segment, one end of the first pre-embedded nut is open toward the vertical end face, and one end of the second pre-embedded nut is open toward the vertical end face, and the connection method comprises the following steps:

[0006] Step 1: Place the first tube segment and the second tube segment to be assembled so that their vertical end surfaces face each other, the ends of the first embedded nuts open toward the vertical end surfaces face each other, and the ends of the second embedded nuts open toward the vertical end surfaces face each other.

[0007] Step 2: Insert a plurality of first connecting bolts from the first installation cavity toward the open end on the inner side or outer side of the first segment, pass through the first installation cavity, and threadably connect with the second embedded nuts;

[0008] Extending a plurality of second connecting bolts from the second installation cavity toward the open end on the inner side or the outer side of the second tube segment, passing through the second installation cavity and threadingly connecting with the first embedded nuts;

[0009] Step 3: Inject grouting material into the vertical joints, so that the grouting material fills the vertical joints and then injects it into the first installation cavity and the second installation cavity, and fills the gap between the first embedded installation component and the first connecting bolt and between the second embedded installation component and the second connecting bolt. After the grouting is completed, wait for the grouting material to solidify.

[0010] The tower segment vertical seam connection method provided in an embodiment of the present invention is used to circumferentially connect a prefabricated first segment and a second segment to assemble a tower segment. Pre-embedded mounting components and pre-embedded nuts are used, and connecting bolts are used to initially interconnect the two segments. Grouting is then used to fill the vertical seams and gaps to further strengthen the connection. This provides a strong and reliable connection, resulting in a strong structural stability for the tower segment and improving the load-bearing capacity of the wind turbine tower.

[0011] In some embodiments, the first pre-embedded installation assembly includes a first pre-embedded hand hole box and a first pre-embedded corrugated pipe, wherein the first pre-embedded hand hole box defines a first installation hand hole open toward the inner side or the outer side of the first pipe segment, a first end of the first pre-embedded corrugated pipe is connected to the first installation hand hole, and a second end of the first pre-embedded corrugated pipe is open toward the vertical end surface of the first pipe segment;

[0012] The second pre-embedded installation assembly includes a second pre-embedded hand hole box and a second pre-embedded corrugated pipe, wherein the second pre-embedded hand hole box defines a second installation hand hole open toward the inner side or the outer side of the second pipe segment, a first end of the second pre-embedded corrugated pipe is connected to the second installation hand hole, and a second end of the second pre-embedded corrugated pipe is open toward the vertical end surface of the second pipe segment;

[0013] Step 2 specifically includes:

[0014] Passing the first connecting bolt through the first embedded hand hole box and the first embedded corrugated pipe in sequence and threading them together with the second embedded nut;

[0015] The second connecting bolt is sequentially passed through the second embedded hand hole box and the second embedded corrugated pipe to be threadedly connected with the first embedded nut.

[0016] In some embodiments, in step 3, grouting material is poured in so that the grouting material fills all of the first installation hand holes and all of the second installation hand holes.

[0017] In some embodiments, after connecting the first connecting bolt to the second embedded nut, the step of using a first nut gasket assembly to fix the first connecting bolt to the end face of the first embedded hand hole box is also included; after connecting the second connecting bolt to the first embedded nut, the step of using a second nut gasket assembly to fix the second connecting bolt to the end face of the second embedded hand hole box is also included.

[0018] In some embodiments, the first embedded hand hole box is provided with a first embedded pad on a side close to the first embedded corrugated pipe, the first end of the first embedded corrugated pipe is connected to the first embedded pad, and the first embedded pad is provided with a first through hole for the first connecting bolt to pass through, and a grouting hole connecting the first embedded corrugated pipe and the first installation hand hole, so that the grouting material in step 3 can be injected from the first embedded corrugated pipe into the first installation hand hole;

[0019] The second embedded hand hole box is provided with a second embedded pad on the side close to the second embedded corrugated pipe, the first end of the second embedded corrugated pipe is connected to the second embedded pad, and the second embedded pad is provided with a second through hole for the second connecting bolt to pass through, and a slurry outlet hole connecting the second embedded corrugated pipe and the second installation hand hole, so that the grouting material in step 3 can be injected from the second embedded corrugated pipe into the second installation hand hole.

[0020] In some embodiments, the first embedded installation components and the first embedded nuts are arranged alternately in the vertical direction, and the second embedded installation components and the second embedded nuts are arranged alternately in the vertical direction.

[0021] In some embodiments, a first embedded bolt is also embedded in the first pipe segment, the first embedded bolt has a first end and a second end, and the first end of the first embedded bolt is threadedly connected to the end of the first embedded nut opposite to its open end; a second embedded bolt is also embedded in the second pipe segment, the second embedded bolt has a first end and a second end, and the second embedded bolt is threadedly connected to the end of the second embedded nut opposite to its open end.

[0022] In some embodiments, a first embedded anchor plate is also embedded in the first pipe segment, and the second end of the first embedded bolt is anchored on the first embedded anchor plate; a second embedded anchor plate is also embedded in the second pipe segment, and the second end of the second embedded bolt is anchored on the second embedded anchor plate.

[0023] In some embodiments, the first pipe segment is arc-shaped and the second pipe segment is arc-shaped, the first connecting bolt and the second connecting bolt are straight bolts, the first embedded bolt is an arc-shaped embedded bolt adapted to the first pipe segment, and the second embedded bolt is an arc-shaped embedded bolt adapted to the second pipe segment.

[0024] In some embodiments, the first pipe segment is arc-shaped or straight-plate-shaped, and the second pipe segment is arc-shaped or straight-plate-shaped; and / or, a first grouting groove extending in the vertical direction is provided on the vertical end face of the first pipe segment, and a second grouting groove extending in the vertical direction is provided on the vertical end face of the second pipe segment, and the first grouting groove and the second grouting groove are relative to form a grouting channel, and the grouting channel is connected to both the first embedded installation component and the second embedded installation component.

[0025] Another embodiment of the present invention further provides a tower prefabricated pipe section, which includes a plurality of pipe segments, and the vertical seams between adjacent pipe segments are connected using the tower pipe segment vertical seam connection method described in any of the above embodiments.

[0026] In some embodiments, the pipe segment is a steel cage-free wind turbine tower pipe segment, and the pipe segment is made of ultra-high performance concrete, which is doped with glass beads and / or fiber materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of the first tube segment (second tube segment) in an embodiment of the present invention.

[0028] Figure 2 It is a perspective view of the connection structure of the first pipe segment and the second pipe segment in an embodiment of the present invention.

[0029] Figure 3 It is a top perspective view of the connection relationship between the first pipe segment and the second pipe segment in an embodiment of the present invention.

[0030] Figure 4 yes Figure 3 Middle AA cross-section.

[0031] Reference numerals:

[0032] The first pipe segment 100, the first embedded installation assembly 110, the first embedded hand hole box 111, the first installation hand hole 1111, the first embedded corrugated pipe 112, the first embedded nut 120, the first connecting bolt 130, the first nut washer assembly 140, the first embedded pad 150, the first embedded bolt 160, the first embedded anchor plate 170, the second pipe segment 200, the second embedded installation assembly 210, the second embedded hand hole box 211, the second installation hand hole 2111, the second embedded corrugated pipe 212, the second embedded nut 220, the second connecting bolt 230, the second nut washer assembly 240, the second embedded pad 250, the second embedded bolt 260, the second embedded anchor plate 270, and the grouting channel 300. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0034] The following is based on Figures 1-4 The tower tube segment vertical seam connection method provided by an embodiment of the present invention is described. The tower tube segment vertical seam connection method provided by an embodiment of the present invention is used to connect the prefabricated first tube segment 100 and the second tube segment 200 in the circumferential direction to assemble a tower tube segment.

[0035] The first segment 100 is pre-embedded with a plurality of first pre-embedded mounting assemblies 110 and a plurality of first pre-embedded nuts 120, while the second segment 200 is pre-embedded with a plurality of second pre-embedded mounting assemblies 210 and a plurality of second pre-embedded nuts 220. The first pre-embedded mounting assemblies 110, first pre-embedded nuts 120, second pre-embedded mounting assemblies 210, and second pre-embedded nuts 220 are all pre-embedded in the segment mold before concrete is poured, and the concrete is poured to form a single unit.

[0036] A first installation cavity is formed within the first embedded installation assembly 110, with one end of the first installation cavity opening toward the inside or outside of the first segment 100 and the other end opening toward the vertical end surface of the first segment 100. A second installation cavity is formed within the second embedded installation assembly 210, with one end of the second installation cavity opening toward the inside or outside of the second segment 200 and the other end opening toward the vertical end surface of the second segment 200. One end of the first embedded nut 120 opens toward the vertical end surface of the first segment 100, and one end of the second embedded nut 220 opens toward the vertical end surface of the second segment 200.

[0037] Among them, the vertical end face of the first pipe segment 100 refers to its end face facing the second pipe segment 200 in the circumferential direction of the pipe segment, and the vertical end face of the second pipe segment 200 refers to its end face facing the first pipe segment 100 in the circumferential direction of the pipe segment. When connected, the vertical end face of the first pipe segment 100 and the vertical end face of the second pipe segment 200 are opposite to each other, and a vertical seam is formed between the two.

[0038] The connection method provided in the embodiment of the present invention includes the following steps:

[0039] Step 1: Place the first tube segment 100 and the second tube segment 200 to be assembled so that their vertical end faces face each other, and the ends of the first embedded nuts 120 that open toward the vertical end faces face the ends of the second installation cavities that open toward the vertical end faces, and the ends of the second embedded nuts 220 that open toward the vertical end faces face the ends of the first installation cavities that open toward the vertical end faces;

[0040] Step 2: Insert a plurality of first connecting bolts 130 from the first installation cavity toward the open end on the inner side or outer side of the first tube segment, pass through the first installation cavity, and then threadably connect with the second embedded nuts 220;

[0041] Insert a plurality of second connecting bolts 230 from the second installation cavity toward the open end on the inner side or outer side of the second tube segment, pass through the second installation cavity, and threadably connect with the first embedded nuts 230;

[0042] Step 3: Inject grouting material into the vertical joints, so that the grouting material fills the vertical joints and then injects it into the first installation cavity and the second installation cavity, and fills the gap between the first embedded installation component 110 and the first connecting bolt 130 and the gap between the second embedded installation component 210 and the second connecting bolt 230. After the grouting is completed, wait for the grouting material to solidify.

[0043] The tower segment vertical seam connection method provided in an embodiment of the present invention is used to circumferentially connect a prefabricated first segment and a second segment to assemble a tower segment. Pre-embedded mounting components and pre-embedded nuts are used, and connecting bolts are used to initially interconnect the two segments. Grouting is then used to fill the vertical seams and gaps to further strengthen the connection. This provides a strong and reliable connection, resulting in a strong structural stability for the tower segment and improving the load-bearing capacity of the wind turbine tower.

[0044] In some embodiments, as Figure 2 and Figure 3As shown, the first embedded installation assembly 110 includes a first embedded handhole box 111 and a first embedded bellows 112. The first embedded handhole box 111 defines a first installation handhole 1111 that is open toward the inside or outside of the first pipe segment 100. The first embedded bellows 112 has a first end and a second end that are opposite and connected. The first end of the first embedded bellows 112 is connected to the first installation handhole 1111. The first installation handhole 1111 and the inner cavity of the first embedded bellows 112 together constitute the first installation cavity. The second end of the first embedded bellows 112 is open toward the vertical end surface of the first pipe segment 100. The second end of the first embedded bellows 112 is opposite to the second embedded nut 220.

[0045] The second embedded installation assembly 210 includes a second embedded handhole box 211 and a second embedded bellows 212. The second embedded handhole box 211 defines a second installation handhole 2111 that opens toward the inside or outside of the second segment 200. The second embedded bellows 212 has a first end and a second end that are opposite and connected. The first end of the second embedded bellows 212 is connected to the second installation handhole 2111. The second installation handhole 2111 and the inner cavity of the second embedded bellows 212 together form a second installation cavity. The second end of the second embedded bellows 212 opens toward the vertical end surface of the second segment 200. The second end of the second embedded bellows 212 is opposite the first embedded nut 120.

[0046] The above step 2 specifically includes:

[0047] The first connecting bolt 130 is sequentially passed through the first embedded hand hole box 111 and the first embedded corrugated pipe 112 and threadedly connected to the second embedded nut 220;

[0048] The second connecting bolt 230 passes through the second embedded hand hole box 211 and the second embedded bellows 212 in sequence and is threadedly connected to the first embedded nut 120 .

[0049] Specifically, the first connecting bolt 130 extends from the open side of the first installation hand hole 1111, passes through the first installation hand hole 1111 and then extends into the first embedded bellows 112, and finally passes through the second end of the first embedded bellows 112 and is connected to the second embedded nut 220; the second connecting bolt 230 extends from the open side of the second installation hand hole 2111, passes through the second installation hand hole 2111 and then extends into the second embedded bellows 212, and finally passes through the second end of the second embedded bellows 212 and is threadedly connected to the first embedded nut 120.

[0050] As an example, Figure 2 and Figure 3As shown, the first embedded hand hole box 111 opens toward the inner side of the first segment 100, and the second embedded hand hole box 211 opens toward the inner side of the second segment 200. In other words, the first installation hand hole 1111 opens toward the inside, and the second installation hand hole 2111 opens toward the inside, and the first connecting bolt 130 and the second connecting bolt 230 are both installed from the inside.

[0051] Of course, in other alternative embodiments, the first embedded hand hole box 111 may be open toward the outside of the first pipe segment 100 , and the second embedded hand hole box 211 may also be open toward the outside of the second pipe segment 200 .

[0052] Furthermore, in some embodiments, in order to facilitate connection, the first connecting bolt 130 and the second connecting bolt 230 are both straight bolts, such as Figure 2 and Figure 3 As shown, the extension direction of the first embedded hand hole box 111, the extension direction of the first embedded bellows 112, and the axial direction of the first embedded nut 120 are all on a straight line, and the first connecting bolt 130 is installed along this straight line. In addition, the extension direction of the second embedded hand hole box 211, the extension direction of the second embedded bellows 212, and the axial direction of the second embedded nut 220 are all on a straight line, and the second connecting bolt 230 is installed along this straight line.

[0053] In some embodiments, after connecting the first connecting bolt 130 to the second embedded nut 220 in step 2, the step of fixing the first connecting bolt 130 to the first embedded installation assembly 110 is also included, and after connecting the second connecting bolt 230 to the first embedded nut 120, the step of fixing the second connecting bolt 230 to the second embedded installation assembly 210 is also included.

[0054] As an example, Figure 2 and Figure 3 As shown, after the first connecting bolt 130 is connected to the second embedded nut 220, the step of fixing the first connecting bolt 130 on the end surface of the first embedded hand hole box 111 using the first nut washer assembly 140 is also included;

[0055] After the second connecting bolt 230 is connected to the first embedded nut 120 , the process further includes fixing the second connecting bolt 230 on the end surface of the second embedded hand hole box 211 using a second nut washer assembly 240 .

[0056] The first nut washer assembly 140 includes a nut and a washer, and the second nut washer assembly 240 includes a nut and a washer. The first nut washer assembly 140 is located inside the first embedded hand hole box 111 and abuts against its end face, and the second nut washer assembly 240 is located inside the second embedded hand hole box 211 and abuts against its end face.

[0057] In some embodiments, in step 3, grouting material is poured in, and the grouting material enters the first pre-buried corrugated pipe 112 and then the first installation hand hole 1111, and also enters the second pre-buried corrugated pipe 212 and the second installation hand hole 2111, so that the grouting material fills all the first installation hand holes 1111 and all the second installation hand holes 2111.

[0058] As an example, Figure 3 and Figure 4 As shown, the first embedded hand hole box 111 is provided with a first embedded pad 150 on a side close to the first embedded bellows 112. The first end of the first embedded bellows 111 is connected to the first embedded pad 150. The first embedded pad 150 is provided with a first through hole for the first connecting bolt 130 to pass through, and a slurry outlet hole connecting the first embedded bellows 112 and the first installation hand hole 1111, so that the grouting material in step 3 can be injected from the first embedded bellows 112 into the first installation hand hole 1111;

[0059] The second embedded hand hole box 211 is provided with a second embedded pad 250 on the side close to the second embedded bellows 212. The first end of the second embedded bellows 212 is connected to the second embedded pad 250. The second embedded pad 250 is provided with a second through hole for the second connecting bolt 230 to pass through, and a slurry outlet hole connecting the second embedded bellows 212 and the second installation hand hole 2111, so that the grouting material in step 3 can be injected from the second embedded bellows 212 into the second installation hand hole 2111.

[0060] In step 2, the first connecting bolt 130 passes through the first installation hand hole 1111, the first through hole on the first embedded pad 150 and the first embedded bellows 112 in sequence, and is then threadedly connected to the second embedded nut 220. The first nut gasket assembly 140 fixes the first connecting bolt 130 and the first embedded hand hole box 111 to each other; the second connecting bolt 230 passes through the second installation hand hole 2111, the second through hole on the second embedded pad 250 and the second embedded bellows 212 in sequence, and is then threadedly connected to the first embedded nut 120. The second nut gasket assembly 240 fixes the second connecting bolt 230 and the second embedded hand hole box 211 to each other.

[0061] In step 3, the grouting material is filled into the first pre-embedded threaded pipe 112 from the vertical joint, and flows into the first installation hand hole 1111 through the grouting hole on the first pre-embedded pad 150. It is also filled into the second pre-embedded corrugated pipe 212 and flows into the second installation hand hole 2111 through the grouting hole on the second pre-embedded pad 250. When it is observed that the vertical joint and all the first installation hand holes 1111 and the second installation hand holes 2111 are filled with grouting material, the grouting is stopped.

[0062] In some embodiments, as Figure 1 and Figure 2As shown, the first embedded installation components 110 and the first embedded nuts 120 are alternately arranged in the vertical direction, and the second embedded installation components 210 and the second embedded nuts 220 are alternately arranged in the vertical direction.

[0063] In some embodiments, in order to improve the structural stability of the embedded nut, as Figure 3 As shown, a first embedded bolt 160 is also embedded in the first pipe segment 100. The first embedded bolt 160 has a first end and a second end. The first end of the first embedded bolt 160 is threadedly connected to the other end of the first embedded nut 120. The other end of the first embedded nut 120 is the end opposite to the open one end thereof, and the other end is embedded in the interior of the first pipe segment 100.

[0064] like Figure 3 As shown, a second embedded bolt 260 is also embedded in the second segment 200. The second embedded bolt 260 has a first end and a second end. The first end of the second embedded bolt 260 is threadedly connected to the other end of the second embedded nut 220. The other end of the second embedded nut 220 is the end opposite to the open one end thereof, and the other end is embedded in the interior of the second segment 200. The provision of the first embedded bolt 160 and the second embedded bolt 260 can improve the structural stability of the embedded nut and prevent the embedded nut from detaching from the segment when subjected to a large load.

[0065] Further, if Figure 3 As shown, a first embedded anchor plate 170 is also pre-embedded in the first segment 100, to which the second end of the first embedded bolt 160 is anchored. A second embedded anchor plate 270 is also pre-embedded in the second segment 200, to which the second end of the second embedded bolt 260 is anchored. The first embedded anchor plate 170 is provided to improve the structural stability of the first embedded bolt 160, and the second embedded anchor plate 270 is provided to improve the structural stability of the second embedded anchor 260.

[0066] Optionally, the first segment 100 is arc-shaped or straight, and the second segment 200 is arc-shaped or straight. In other words, the tower segment vertical seam connection method provided in the embodiment of the present invention can be used to connect tower segments with circular cross-sections or with polygonal cross-sections.

[0067] In some embodiments, as Figure 3 As shown, the first pipe segment 100 is arc-shaped and the second pipe segment 200 is arc-shaped, the first connecting bolt 130 and the second connecting bolt 230 are straight bolts, the first embedded bolt 160 is an arc-shaped embedded bolt adapted to the first pipe segment 100, and the second embedded bolt 260 is an arc-shaped embedded bolt adapted to the second pipe segment 200.

[0068] In some embodiments, in order to improve the shear bearing capacity of the tower tube section, Figure 3 As shown, a first grouting groove extending in the vertical direction is provided on the vertical end face of the first pipe segment 100, and a second grouting groove extending in the vertical direction is provided on the vertical end face of the second pipe segment 200. The first grouting groove and the second grouting groove are relative to each other to form a grouting channel 300. The grouting channel 300 is connected to both the first embedded installation component 110 and the second embedded installation component 220, that is, it is connected to both the first embedded bellows 112 and the second embedded bellows 212. In step 3, the grouting material is injected into the grouting channel 300 through the bottom or top of the grouting channel 300. The grouting material flows along the grouting channel 300 under the pressure of the pump and fills the entire vertical joint. It is injected into the first embedded bellows 112 and the second embedded bellows 212. After filling the first embedded bellows 112 and the second embedded bellows 212, it overflows from the slurry outlet into the first embedded hand hole box 111 and the second embedded hand hole box 211 and fills them.

[0069] Step 3 of the tower segment vertical seam connection method provided in an embodiment of the present invention further specifically includes observing the overflow of grouting material from each first and second pre-embedded handhole boxes 111, 211, and grouting channel 300 during the grouting process. Grouting is considered complete when the belts are completely filled and grouting material is overflowing. After grouting is completed and the grouting material reaches initial setting, the pipe segment can be hoisted and either hoisted to the machine station or moved to a storage area.

[0070] In some embodiments, the tower tube segment vertical seam connection method provided by the embodiment of the present invention is applicable to the vertical seam connection of the unreinforced cage tower tube segment, that is, the first pipe section 100 and the second pipe section 200 are both unreinforced cage tower tube segments.

[0071] Another embodiment of the present invention provides a prefabricated tower segment. The prefabricated tower segment comprises a plurality of segments, wherein adjacent segments are connected by vertical seams using the tower segment vertical seam connection method described in any of the aforementioned embodiments. The prefabricated tower segment provided by the present invention has a stable connection and strong load-bearing capacity, making it suitable for the production of ultra-tall wind turbine towers.

[0072] In some preferred embodiments, the segments of the prefabricated tower sections are cage-free wind turbine tower segments. Cage-free wind turbine tower segments eliminate the need for steel cages, simplify the manufacturing process, and contribute to the lightweight development of wind turbine towers.

[0073] The inventors propose that the steel cage-free wind turbine tower segments can be made of ultra-high performance concrete (UHPC (Ultra-High Performance Concrete), also known as reactive powder concrete (RPC)).

[0074] Traditional steel fiber reinforced concrete (SFRC) is a multi-phase, multi-component cement-based composite material formed by incorporating an appropriate amount of randomly distributed short steel fibers into ordinary concrete. SFRC has higher compressive strength than ordinary concrete, but its tensile strength is less than ideal, making it prone to brittle fracture.

[0075] Ultra-high performance concrete (UHPRC) uses no coarse aggregate and boasts high density, exceptional durability, exceptional mechanical properties, and excellent compressive strength (typically 150-200 MPa). Furthermore, the addition of short, linear, circular steel fibers to the resulting ultra-high performance steel fiber reinforced concrete (UHPRC) increases its tensile strength to 12-18 MPa and its flexural strength to 30-60 MPa. Compared to conventional steel fiber reinforced concrete, its mechanical properties offer significant advantages across the board.

[0076] To enhance the tensile strength of ultra-high performance concrete, the unreinforced cage wind turbine tower segments cast with this concrete are preferably less prone to cracking. Ultra-high performance concrete is doped with glass beads and / or fiber materials. By adding appropriate amounts of glass beads and fiber materials, the tensile strength of the ultra-high performance concrete is effectively increased, making the unreinforced cage wind turbine tower segments less prone to cracking and more durable.

[0077] Optionally, the fiber material mixed in the ultra-high performance concrete is spiral fiber, plate fiber, or wave fiber.

[0078] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0079] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0080] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0081] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0082] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean 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 expressions of the above terms do 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. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0083] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A tower tube segment vertical seam connection method, characterized in that: The connection method is used to connect a prefabricated first pipe segment and a second pipe segment in a circumferential direction, wherein a plurality of first pre-embedded installation components and a plurality of first pre-embedded nuts are pre-embedded in the first pipe segment, and a plurality of second pre-embedded installation components and a plurality of second pre-embedded nuts are pre-embedded in the second pipe segment, a first installation cavity is formed inside the first pre-embedded installation component, one end of the first installation cavity is open toward the inner side or outer side of the first pipe segment, and the other end is open toward the vertical end surface of the first pipe segment, a second installation cavity is formed inside the second pre-embedded installation component, one end of the second installation cavity is open toward the inner side or outer side of the second pipe segment, and the other end is open toward the vertical end surface of the second pipe segment, one end of the first pre-embedded nut is open toward the vertical end surface, and one end of the second pre-embedded nut is open toward the vertical end surface, and the connection method comprises the following steps: Step 1: Place the first tube segment and the second tube segment to be assembled so that their vertical end surfaces face each other, the ends of the first embedded nuts open toward the vertical end surfaces face each other, and the ends of the second embedded nuts open toward the vertical end surfaces face each other. Step 2: Insert a plurality of first connecting bolts from the first installation cavity toward the open end on the inner side or outer side of the first segment, pass through the first installation cavity, and threadably connect with the second embedded nuts; Extending a plurality of second connecting bolts from the second installation cavity toward the open end on the inner side or the outer side of the second tube segment, passing through the second installation cavity and threadingly connecting with the first embedded nuts; Step 3: inject grouting material into the vertical joints, so that the grouting material fills the vertical joints and then is injected into the first installation cavity and the second installation cavity, and fills the gaps between the first embedded installation component and the first connecting bolt and between the second embedded installation component and the second connecting bolt. After the grouting is completed, wait for the grouting material to solidify; The first pre-embedded installation assembly includes a first pre-embedded hand hole box and a first pre-embedded corrugated pipe, wherein the first pre-embedded hand hole box defines a first installation hand hole open toward the inner side or the outer side of the first pipe segment, a first end of the first pre-embedded corrugated pipe is connected to the first installation hand hole, and a second end of the first pre-embedded corrugated pipe is open toward the vertical end surface of the first pipe segment; The second pre-embedded installation assembly includes a second pre-embedded hand hole box and a second pre-embedded corrugated pipe, wherein the second pre-embedded hand hole box defines a second installation hand hole open toward the inner side or the outer side of the second pipe segment, a first end of the second pre-embedded corrugated pipe is connected to the second installation hand hole, and a second end of the second pre-embedded corrugated pipe is open toward the vertical end surface of the second pipe segment; Step 2 specifically includes: Passing the first connecting bolt through the first embedded hand hole box and the first embedded corrugated pipe in sequence and threading them together with the second embedded nut; Passing the second connecting bolt through the second embedded hand hole box and the second embedded corrugated pipe in sequence and threading them together with the first embedded nut; The first embedded hand hole box is provided with a first embedded pad on a side close to the first embedded corrugated pipe, the first end of the first embedded corrugated pipe is connected to the first embedded pad, and the first embedded pad is provided with a first through hole for the first connecting bolt to pass through, and a grouting hole connecting the first embedded corrugated pipe and the first installation hand hole, so that the grouting material in step 3 can be injected from the first embedded corrugated pipe into the first installation hand hole; The second embedded hand hole box is provided with a second embedded pad on the side close to the second embedded corrugated pipe, the first end of the second embedded corrugated pipe is connected to the second embedded pad, and the second embedded pad is provided with a second through hole for the second connecting bolt to pass through, and a slurry outlet hole connecting the second embedded corrugated pipe and the second installation hand hole, so that the grouting material in step 3 can be injected from the second embedded corrugated pipe into the second installation hand hole.

2. The tower tube segment vertical seam connection method according to claim 1, characterized in that: In step 3, grouting material is poured in so that the grouting material fills all the first installation hand holes and all the second installation hand holes.

3. The tower tube segment vertical seam connection method according to claim 1, characterized in that: After connecting the first connecting bolt and the second embedded nut, the method further includes the step of fixing the first connecting bolt to the end surface of the first embedded hand hole box using a first nut washer assembly; After connecting the second connecting bolt to the first embedded nut, the method further includes a step of fixing the second connecting bolt on the end surface of the second embedded hand hole box using a second nut gasket assembly.

4. The tower tube segment vertical seam connection method according to claim 1, characterized in that: The first embedded installation components and the first embedded nuts are arranged alternately in the vertical direction, and the second embedded installation components and the second embedded nuts are arranged alternately in the vertical direction.

5. The tower tube segment vertical seam connection method according to claim 1, characterized in that: A first embedded bolt is also embedded in the first segment, the first embedded bolt having a first end and a second end, the first end of the first embedded bolt being threadedly connected to an end portion of the first embedded nut opposite to the open end thereof; A second embedded bolt is also embedded in the second pipe segment. The second embedded bolt has a first end and a second end. The second embedded bolt is threadedly connected to the end of the second embedded nut opposite to the open end thereof.

6. The tower tube segment vertical seam connection method according to claim 5, characterized in that: A first embedded anchor plate is also embedded in the first segment, and the second end of the first embedded bolt is anchored on the first embedded anchor plate; A second embedded anchor plate is also embedded in the second pipe segment, and the second end of the second embedded bolt is anchored on the second embedded anchor plate.

7. The tower tube segment vertical seam connection method according to claim 5, characterized in that: The first pipe segment is arc-shaped and the second pipe segment is arc-shaped, the first connecting bolt and the second connecting bolt are straight bolts, the first embedded bolt is an arc-shaped embedded bolt adapted to the first pipe segment, and the second embedded bolt is an arc-shaped embedded bolt adapted to the second pipe segment.

8. The tower tube segment vertical seam connection method according to claim 1, characterized in that: The first tube segment is arc-shaped or straight-plate-shaped, and the second tube segment is arc-shaped or straight-plate-shaped; And / or, a first grouting groove extending in the vertical direction is provided on the vertical end surface of the first pipe segment, and a second grouting groove extending in the vertical direction is provided on the vertical end surface of the second pipe segment, the first grouting groove and the second grouting groove form a grouting channel relative to each other, and the grouting channel is connected to both the first embedded installation component and the second embedded installation component.

9. A tower prefabricated pipe section, characterized in that: The tower prefabricated pipe section includes a plurality of pipe segments, and the vertical seams between adjacent pipe segments are connected using the tower pipe segment vertical seam connection method according to any one of claims 1 to 7.

10. The tower prefabricated pipe section according to claim 9, characterized in that: The pipe segment is a steel cage-free wind turbine tower pipe segment, and the pipe segment is made of ultra-high performance concrete, wherein the ultra-high performance concrete is doped with glass microspheres and / or fiber materials.

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