A super-large wind turbine duct frame foundation split structure and construction method

Abstract

The present application relates to the technical field of offshore wind power generation, and discloses a split structure of a super-large wind turbine jacket foundation, including an upper structure and a lower structure, wherein one end of the upper structure has a plurality of insertion sections, and one end of the lower structure has a plurality of connecting sections, and the connecting sections have slots for inserting the insertion sections; further comprising a plurality of limit plates, and each of the insertion sections is provided with a plurality of limit plates on its circumference; further comprising a plurality of grouting pipelines, and when the insertion sections are plugged into and matched with the connecting sections, the grouting pipelines are connected to the slots. Also disclosed is a method for installing a split structure of a super-large wind turbine jacket foundation. The present application can provide greater convenience for the processing, transportation, and installation of the jacket foundation, so that offshore wind power generation can continue to develop further into the deep sea.

Description

Technical Field

[0001] The present application relates to the technical field of offshore wind power generation, and in particular to a split structure of a super-large wind turbine jacket foundation and a construction method. Background Art

[0002] The super-large wind turbine jacket foundation refers to a wind turbine foundation suitable for deep sea areas. It is used to support the wind turbine body so that the wind turbine body can stably utilize wind power generation in deep sea areas.

[0003] At present, the construction of offshore wind farms in my country is gradually advancing towards the deep sea. The single-unit capacity of the wind turbine body is gradually increasing, and the deep sea marine hydrogeological conditions are gradually becoming worse, resulting in the external loads on the wind turbine foundation becoming increasingly larger.

[0004] Combined with the current development trend of offshore wind power generation, as the water depth of the wind farm location increases, the height and weight of the corresponding jacket foundation also become larger and larger, making it difficult for onshore processing plants to process the jacket foundation as a whole, and it is also difficult to transport and install the jacket foundation as a whole at sea. This greatly limits the development of offshore wind power generation in the deep sea. Summary of the Invention

[0005] The present application provides a split structure and construction method for a super-large wind turbine jacket foundation, which greatly facilitates the processing, transportation and installation of the jacket foundation, enabling offshore wind power generation to continue to develop further into the deep sea.

[0006] On the one hand, the present application provides a super-large wind turbine jacket foundation split structure, which adopts the following technical solutions:

[0007] A split-type structure for a super-large wind turbine jacket foundation, comprising an upper structure and a lower structure, wherein one end of the upper structure has a plurality of insertion sections, and one end of the lower structure has a plurality of connecting sections, each of the connecting sections having slots for inserting the insertion sections, wherein the plurality of insertion sections corresponds one to one with the plurality of connecting sections;

[0008] It also includes a plurality of limiting plates, each of which includes a connecting portion and a limiting portion, wherein the connecting portion is connected to the upper structure, the limiting portion is located on one side of the insertion section, and the length direction of the limiting portion is parallel to the length direction of the insertion section, and each of the insertion sections is provided with a plurality of limiting plates on its circumference;

[0009] It also includes a plurality of grouting pipelines, which are arranged on the upper structure. One end of the grouting pipeline is close to the insertion section. When the insertion section is plugged into the connecting section, the grouting pipeline is communicated with the slot.

[0010] By adopting the above technical solution, the split structure of the large wind turbine jacket foundation is divided into an upper structure and a lower structure, which are connected by grouting; during the processing, the processing of the two is independent of each other, which can realize streamlined and multi-operation surface processing, thereby improving the processing efficiency of the split structure of the large wind turbine jacket foundation; and, during transportation, the split structure can effectively reduce the difficulty of lifting construction, reduce the cost of ship machinery and equipment, control engineering investment, and effectively avoid the risks brought by the transportation of ultra-high marine structures; in addition, during the installation process, a number of limit plates can effectively ensure the stability of the upper structure and the lower structure during plug-in and grouting, greatly improving construction safety, and the installation process is simple to operate. The installed large wind turbine jacket foundation split structure has high structural stability.

[0011] Optionally, the end of the limiting portion away from the connecting portion has a guide surface, the guide surface is an inclined surface, and the end of the guide surface close to the insertion section is an inclined upper end.

[0012] By adopting the above technical solution, during the process of hoisting the upper structure so that the insertion section and the connecting section are plugged in and matched, if the insertion section and the connecting section are not completely aligned, resulting in the connecting section abutting against the end of one or more limiting parts, the guide surface can help the upper structure adjust its position so that the insertion section can be smoothly plugged in and matched with the connecting section, thereby improving the fault tolerance rate during the hoisting process of the upper structure, thereby making the installation process of the upper structure simpler and more convenient.

[0013] Optionally, after the insertion section is plugged into the connection section, when the connection section abuts against the limiting portion, a distance exists between the insertion section and the peripheral groove wall of the slot.

[0014] By adopting the above technical solution, if the insertion section and the connecting section are plugged in with the maximum error, that is, the connecting section and the limiting portion are abutted against each other after the insertion section and the connecting section are plugged in, there is still space for grouting material to be filled between the insertion section and the peripheral groove wall of the slot, so that after the grouting material solidifies, the upper structure and the lower structure can still be connected and have a certain connection strength, thereby further improving the structural stability of the split structure after installation.

[0015] Optionally, it further comprises a plurality of limit assemblies, wherein the plurality of limit assemblies correspond to the plurality of limit plates in a one-to-one manner;

[0016] The limiting assembly includes a first movable member, a second movable member, and an elastic member. The first movable member is located between the limiting portion and the insertion section and is disposed on the limiting portion. The second movable member is disposed on the limiting portion. Both ends of the elastic member are connected to the first movable member and the second movable member, respectively, and the elastic member drives the first movable member and the second movable member to maintain contact with each other.

[0017] A slot is provided on the first movable member. When the inserting section is inserted into the slot, the connecting section is inserted into the slot and drives the first movable member to move toward the connecting portion.

[0018] By adopting the above technical solution, during the process of plugging and fitting the insertion section and the connecting section, after the several limit plates guide the insertion section and the connecting section to be initially aligned, the several first movable parts will be engaged with the connecting section through their own slots. When the insertion section continues to penetrate into the slot, the connecting section will simultaneously drive the several first movable parts to move, and the several elastic parts are therefore stretched. The stretched elastic parts have a tendency to drive the first movable parts toward the second movable parts, and the degree of stretching of the several elastic parts will tend to be equal, thereby having a corrective effect on the insertion section, making the alignment effect of the insertion section and the connecting section better, improving the plug-and-match effect of the two, and thereby improving the quality of the upper structure and the lower structure after connection.

[0019] Optionally, when the elastic member drives the first movable member and the second movable member to maintain abutment against each other, the first movable member abuts against the insertion section.

[0020] By adopting the above technical solution, during the process of connecting the limit plate to the upper structure, when the elastic member drives the first movable member and the second movable member to maintain contact with each other, the first movable member is contacted and maintained with the peripheral side of the insertion section, and then the position of the limit plate on the peripheral side of the insertion section is adjusted to determine the connection position of the limit plate, which can make the process of connecting the limit plate to the upper structure more convenient and quick, and improve construction efficiency.

[0021] Optionally, a first overflow hole is provided on the first movable part. After the insertion section and the connecting section are plugged into each other, one end of the first overflow hole is connected to the slot, and the other end of the first overflow hole passes through one end of the first movable part close to the limiting plate.

[0022] By adopting the above technical solution, after the insertion section and the connecting section are plugged into each other, when grouting is poured into the remaining space in the slot, when the grouting material overflows from the opening of the slot, the grouting material will overflow from the first overflow hole. By observing the overflow of several first overflow holes, when grouting material overflows from several first overflow holes, it means that the grouting material has filled the remaining space in the slot, thereby reducing the probability that the grouting material overflows from the opening of the slot but does not fill the remaining space in the slot, thereby improving the grouting effect and also improving the connection strength between the upper structure and the lower structure after the grouting material solidifies.

[0023] Optionally, the limiting plate is provided with a sliding groove and a clearance groove along the length direction of the limiting portion, the second movable member is located in the sliding groove and is slidably connected to the limiting portion, and when the first movable member abuts against the second movable member, the first movable member is located in the clearance groove; when the first movable member is separated from the second movable member, the elastic member passes through the clearance groove;

[0024] The limiting assembly further includes a plurality of fixing members, which are detachably connected to the limiting plate. When the second movable member slides in a direction away from the connecting portion to an extreme position, the fixing members fix the position of the second movable member.

[0025] A second overflow hole is provided on the second movable member, one end of the second overflow hole is communicated with the give way groove, and the other end of the second overflow hole passes through an end of the second movable member away from the give way groove. When the elastic member drives the first movable member to abut against the second movable member, the second overflow hole is communicated with the first overflow hole.

[0026] By adopting the above technical solution, during the process of plugging and matching the insertion section and the connecting section, the second movable part is fixed in a position away from the connecting part in the sliding groove by the fixing part, so that the elastic part can be stretched to the maximum extent after the connecting section drives the first movable part to move, thereby increasing the force of the elastic part after being stretched, thereby improving the correction effect of the limit assembly; during the grouting process, after the fixing effect of the fixing part on the second movable part is released, the second movable part will slide to counteract the first movable part under the force of the stretched elastic part, so that the second overflow hole is connected to the first overflow hole, and when the grouting material overflows from the opening of the slot, the grouting material will overflow through the first overflow hole and the second overflow hole in turn. Overflowing from the second overflow hole can make it easier for construction personnel to observe the overflow of the grouting material, and it can also make it easier for construction personnel to clean up the overflowed grouting material.

[0027] Optionally, a plurality of adjusting members with adjustable thickness are further included, wherein the adjusting members are arranged at the end of the insertion section, and after the insertion section and the connecting section are plugged into each other, the adjusting members abut against the groove wall at the bottom of the slot.

[0028] By adopting the above technical solution, after the installation of the lower structure is completed, due to construction errors, several connecting sections may not be on the same horizontal plane. By adjusting the thickness of the corresponding adjusting parts according to the position of the several connecting sections, the upper structure can be installed on the lower structure and can be in a vertical state as a whole, so that the super-large wind turbine duct frame foundation split structure can maintain structural stability after installation, thereby improving construction quality.

[0029] Optionally, the insertion section has a plurality of anti-shear keys on the peripheral side surface, and the connecting section also has a plurality of anti-shear keys on the peripheral side groove wall of the slot; after the insertion section and the connecting section are plugged into each other, the plurality of anti-shear keys on the insertion section and the plurality of anti-shear keys on the connecting section are staggered.

[0030] By adopting the above technical solution, after the grouting is completed, the several shear keys on the inserted section and the several shear keys on the connecting section can improve their own shear resistance, and the staggered distribution of the several shear keys on the inserted section and the several shear keys on the connecting section can further improve the shear resistance of the shear keys, thereby further improving the connection strength between the upper structure and the lower structure.

[0031] On the other hand, the present application also provides a construction method, which adopts the following technical solution:

[0032] A construction method for installing any of the above-mentioned super-large wind turbine duct frame foundation split structures, the specific steps are as follows:

[0033] S1, hoisting the lower structure so that one end of the lower structure away from the connecting section is fixedly connected to the suction pile;

[0034] S2. Fixedly connecting the plurality of limit plates to the insertion section;

[0035] S3, hoisting the upper structure so that the plurality of insertion sections are plugged into and matched with the corresponding connection sections under the guidance of the plurality of limiting plates;

[0036] S4, pouring grouting material into the remaining space of the slot through the grouting pipeline, observing the overflow of the grouting material from the slot, and stopping grouting when the grouting material overflows;

[0037] S5. Wipe off the overflowed grouting material, and wait for the grouting material to solidify. Then, the upper structure is installed on the lower structure, and the construction is completed.

[0038] By adopting the above technical solution, the lower structure is first installed and fixed on the suction piles, and then the upper structure is installed and fixed on the lower structure. The two are installed in sequence, which can reduce the difficulty of the overall installation and facilitate construction. During the installation and fixation of the upper structure on the lower structure, several limit plates can help construction personnel align the insertion section and the connecting section, making the installation and fixation process of the upper structure on the lower structure simpler and more convenient. After the insertion section and the connecting section are plugged in and matched, grouting material is poured into the remaining space in the slot through the grouting pipeline and after the grouting material solidifies, the connection strength between the upper structure and the lower structure can be effectively improved, thereby improving the overall structural stability.

[0039] In summary, this application has at least one of the following beneficial effects:

[0040] 1. The upper and lower structures can be processed independently during the machining process, enabling streamlined, multi-surface machining and improving the machining efficiency of the split structure of the large wind turbine jacket foundation;

[0041] 2. The split structure can effectively reduce the difficulty of hoisting construction during transportation, reduce the cost of ship machinery and equipment, control project investment, and effectively avoid the risks associated with the transportation of ultra-high offshore structures;

[0042] 3. During the installation process, several limit plates can effectively ensure the stability of the upper and lower structures during plugging and grouting, greatly improving construction safety. The installation process is simple and the installed large wind turbine duct frame foundation split structure has high structural stability.

[0043] 4. Several limit components can further improve the stability of the connection between the upper structure and the lower structure and the grouting, making the construction process more convenient and improving construction efficiency. At the same time, it is easy to observe the grouting situation, improve the grouting effect, and facilitate construction personnel to clean up excess grouting materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a structural diagram of a super-large wind turbine duct frame foundation split structure after installation in Example 1;

[0045] Figure 2 is a schematic structural diagram of the lower structure in Example 1;

[0046] Figure 3 is a schematic structural diagram of the upper structure in Example 1;

[0047] Figure 4 yes Figure 1 Enlarged view of point A in the middle;

[0048] Figure 5 yes Figure 4 Cross-sectional view along line BB;

[0049] Figure 6 It is a partial cross-sectional view of the insertion section and the connecting section after being plugged into each other in Example 2.

[0050] Explanation of the accompanying drawings: 1. Upper structure; 11. Insertion section; 12. Neck section; 2. Lower structure; 21. Connection section; 211. Slot; 3. Suction pile; 4. K-type reinforcement structure; 5. Closing plate; 6. Limiting plate; 61. Connection part; 62. Limiting part; 621. Guide surface; 63. Sliding groove; 64. Give way groove; 65. Installation groove; 7. Adjusting part; 8. Grouting pipeline; 9. Limiting assembly; 91. First movable part; 911. Card slot; 912. First overflow hole; 92. Second movable part; 921. Second overflow hole; 93. Elastic part; 94. Fixing part; 10. Shear key. DETAILED DESCRIPTION

[0051] The following is combined with Figure 1-6 This application is described in further detail.

[0052] The embodiment of the present application discloses a split structure of a super-large wind turbine duct frame foundation.

[0053] Example 1:

[0054] Reference Figure 1 The split-structure jacket foundation for a super-large wind turbine consists of an upper structure 1 and a lower structure 2. The lower structure 2 is fixedly mounted on suction piles 3 pre-set in the sea area. The upper structure 1 is fixedly mounted above the lower structure 2, thus forming the jacket foundation for the super-large wind turbine. In this embodiment, the outer contours of both the upper structure 1 and the lower structure 2 are preferably prism-shaped, and the outer contour of the jacket foundation formed by the connection and installation of the upper structure 1 and the lower structure 2 is also prism-shaped. The tops of the prism-shaped upper and lower structures 1 and 2 are equipped with multiple lifting lugs to facilitate equipment lifting.

[0055] In this embodiment, the main bodies of both the upper structure 1 and the lower structure 2 are preferably formed by welding a plurality of hollow cylindrical pipes end to end. Both the upper structure 1 and the lower structure 2 are provided with a K-shaped reinforcement structure 4 to ensure their structural strength. This prevents the impact of flexible deformation of oversized pipe racks on construction alignment and improves construction feasibility. The K-shaped reinforcement structure 4 is composed of a plurality of pipes. Since the K-shaped reinforcement structure 4 is a common prior art in the art, it will not be described in detail here.

[0056] Reference Figure 2 and Figure 3 After the lower structure 2 is fixedly installed on the suction pile 3, the end of the lower structure 2 away from the suction pile 3 has several connecting sections 21 extending outward along its own center line; the end of the upper structure 1 used for connecting and fixing with the lower structure 2 has several insertion sections 11 extending outward along its own center line.

[0057] Reference Figure 1 and Figure 4The plurality of insertion sections 11 on the upper structure 1 correspond one-to-one to the plurality of connection sections 21 on the lower structure 2. Both the insertion sections 11 and the connection sections 21 are hollow cylindrical structures. The internal space of the connection section 21 has a slot 211 for the insertion section 11 to be inserted. The slot 211 communicates with the interior of the adjacent conduit on the lower structure 2. The internal space of the insertion section 11 also communicates with the internal space of the adjacent conduit on the upper structure 1. A plurality of sealing plates 5 are fixedly installed on both the upper structure 1 and the lower structure 2. The plurality of sealing plates 5 on the upper structure 1 correspond one-to-one to the plurality of insertion sections 11. The sealing plates 5 are located at the junction of the insertion section 11 and the upper structure 1, and are used to separate the internal space of the insertion section 11 from the internal space of the adjacent conduit. The plurality of sealing plates 5 on the lower structure 2 correspond one-to-one to the plurality of connection sections 21. The sealing plates 5 are located at the junction of the connection section 21 and the lower structure 2, and are used to separate the slot 211 from the internal space of the adjacent conduit.

[0058] After the lower structure 2 is fixedly installed on the suction piles 3, the upper structure 1 will be hoisted above the lower structure 2 and then moved downward in the vertical direction to form a preliminary connection through the plug-in fit of the insertion section 11 and the connecting section 21. The radial dimensions of the connecting section 21 are equal to the radial dimensions of the conduit adjacent to it, and the radial dimensions of the conduit adjacent to the insertion section 11 are equal to the radial dimensions of the conduit adjacent to the connecting section 21. Since the insertion section 11 needs to be inserted into the slot 211 to plug and fit with the connecting section 21, the radial dimensions of the insertion section 11 are smaller than the radial dimensions of the conduit adjacent to it. A necking section 12 for transitioning radial dimensions is provided between the upper structure 1 and the insertion section 11. The necking section 12 is in the shape of a cone and is also a hollow structure.

[0059] Reference Figure 4 and Figure 5 The split structure of the super-large wind turbine duct frame foundation also includes a number of limit plates 6. The limit plates 6 are L-shaped plate structures as a whole, and the limit plates 6 are fixedly installed on the upper structure 1. The shorter end of the limit plate 6 is the connecting portion 61, and the longer end of the limit plate 6 is the limiting portion 62. The length direction of the connecting portion 61 is perpendicular to the length direction of the limiting portion 62. One end of the connecting portion 61 is connected to one end of the limiting portion 62, and the end of the connecting portion 61 away from the limiting portion 62 is fixedly connected to the necking section 12. The connecting portion 61 is located on the circumferential side of the insertion section 11 and the length direction of the connecting portion 61 is parallel to the axis of the insertion section 11. There are a total of multiple connection portions 61 of the limit plates 6 on the same necking section 12, and the limiting portions 62 of the multiple limit plates 6 are distributed in a circular array on the circumferential side of the insertion section 11 with the axis of the insertion section 11 as the axis. In this embodiment, the preferred number of limit plates 6 is six.

[0060] The end of the limiting portion 62 away from the connecting portion 61 has a guide surface 621, and the guide surface 621 is an inclined surface. The distance between the end of the guide surface 621 close to the insertion section 11 and the insertion section 11 is smaller than the distance between the end of the guide surface 621 away from the insertion section 11 and the insertion section 11, and the distance between the end of the guide surface 621 close to the insertion section 11 and the insertion section 11 is greater than the difference between the radius dimension of the outer diameter of the connecting section 21 and the radius dimension of the slot 211.

[0061] Reference Figure 3 and Figure 4 The super-large wind turbine duct support structure also includes an adjustment member 7, which is a cylindrical structure with an adjustable thickness. The adjustment member 7 is fixedly mounted on the sealing plate 5 on the insertion section 11. The adjustment member 7 is located on the side of the insertion section 11 away from the adjacent duct, and the axis of the adjustment member 7 coincides with the axis of the insertion section 11. In this embodiment, the adjustment member 7 is preferably formed by stacking and connecting several discs of the same thickness, and the thickness of the adjustment member 7 corresponding to different insertion sections 11 can be different.

[0062] During the process of plugging and fitting the insertion section 11 and the connecting section 21, several limit plates 6 play a guiding role. When the alignment between the insertion section 11 and the connecting section 21 is poor, the connecting section 21 will abut against the guide surfaces 621 on one or more limit plates 6. The guide surfaces 621 will guide the upper structure 1 to adjust its position in the horizontal direction, thereby improving the alignment between the insertion section 11 and the connecting section 21 and improving the quality of plugging and fitting.

[0063] The insertion section 11 is inserted into the slot 211 until the adjustment member 7 on the insertion section 11 abuts against the sealing plate 5 on the connecting section 21, at which point the insertion section 11 and the connecting section 21 are plugged in and matched. When the lower structure 2 is fixedly installed on the suction pile 3, the lower structure 2 may be slightly tilted after installation due to construction errors, that is, the positions of several connecting sections 21 on the lower structure 2 are not in the same horizontal plane. If the thickness of the several adjustment members 7 fixedly installed on the several insertion sections 11 on the upper structure 1 is the same at this time, then after the upper structure 1 is fixedly installed on the lower structure 2, the upper structure 1 will also be slightly tilted after installation, thereby causing the entire split structure of the super-large wind turbine duct frame foundation to tilt, and its structural stability will be affected, resulting in a major safety hazard during its use.

[0064] Therefore, after the installation of the lower structure 2 is completed, it is necessary to measure the positions of the several connecting sections 21 on the lower structure 2, and then determine the thickness of the adjusting members 7 required to be fixedly installed on the several inserting sections 11 on the upper structure 1. By changing the thickness of the adjusting members 7, the upper structure 1 can be kept vertical after being fixedly installed on the lower structure 2. In this embodiment, it is preferred that the adjusting members 7 be fixedly installed on the upper structure 1 after the installation of the lower structure 2 is completed. In addition, in order to reduce the risk of damage to the several limiting plates 6 during the transportation of the upper structure 1, it is preferred that the limiting plates 6 be fixedly installed on the upper structure 1 before the upper structure 1 is fixedly installed on the lower structure 2.

[0065] Reference Figure 4 and Figure 5 The super-large wind turbine jacket foundation split structure also includes several grouting lines 8 located within the jacket of the superstructure 1. These lines 8 are secured to the inner wall of the jacket via several mounting brackets, and correspond one-to-one with the plurality of insertion sections 11. One end of each grouting line 8 passes through the interior space of the necked section 12, then into the interior space of the insertion section 11. It then exits one side of the insertion section 11 to form an outlet for the grouting material to flow out. The other end of each grouting line 8 is located near the end of the superstructure 1 away from the insertion section 11, exits the interior space of the jacket, and forms an inlet for the grouting material to flow in.

[0066] After the insertion section 11 and the connecting section 21 are plugged into each other, the construction personnel inject grouting material into the remaining space in the slot 211 through the grouting pipe 8 until the remaining space in the slot 211 is filled with grouting material. After the grouting material solidifies, the insertion section 11 and the connecting section 21 are fixedly connected by the grouting material. In this embodiment, the grouting material is preferably concrete.

[0067] When the insertion section 11 is inserted into the slot 211 until the adjusting piece 7 on the insertion section 11 abuts against the sealing plate 5 on the connecting section 21, the axis of the insertion section 11 and the axis of the connecting section 21 are easily misaligned and cannot be aligned, so that the thickness of the solidified grouting material around the insertion section 11 after grouting is uneven, affecting the effect of the grouting material on strengthening the connection strength between the insertion section 11 and the connecting section 21; when the thickness of the solidified grouting material around the insertion section 11 is less than a certain value, the grouting material will not be able to strengthen the connection strength between the insertion section 11 and the connecting section 21; therefore, when the degree of misalignment between the insertion section 11 and the connecting section 21 is the largest, that is, when one side of the connecting section 21 abuts against the limiting portion 62 of a limiting plate 6, there is still a distance between the end of the insertion section 11 away from the limiting plate 6 abutting against the connecting section 21 and the side groove wall of the slot 21, and the distance is greater than the above-mentioned fixed value.

[0068] Reference Figure 3 and Figure 4To further enhance the connection strength between the insertion section 11 and the connecting section 21, the outer surface of the insertion section 11 is provided with a plurality of shear keys 10. The shear keys 10 are arranged around the axis of the insertion section 11 to form a ring structure. The shear keys 10 on the outer surface of the insertion section 11 are evenly spaced along the axis of the insertion section 11. The connecting section 21 is also provided with a plurality of shear keys 10 on the peripheral groove wall of the slot 211. The shear keys 10 are arranged around the axis of the connecting section 21 to form a ring structure. The shear keys 10 on the peripheral groove wall of the slot 211 are evenly spaced along the axis of the connecting section 21. After the insertion section 11 and the connecting section 21 are plugged in and mated, the shear keys 10 on the insertion section 11 and the shear keys 10 on the connecting section 21 are staggered along the axis of the insertion section 11 or the axis of the connecting section 21. In this embodiment, the cross-section of the shear key 10 is preferably semicircular, with the straight line side of the semicircle serving as the connecting surface. In other embodiments, the cross-section of the shear key 10 may also be of other shapes.

[0069] In this embodiment, it is preferred that the sealing plate 5 and the connecting section 21 and the lower structure 2, the sealing plate 5 and the insertion section 11, the necking section 12 and the insertion section 11 and the upper structure 1, the limiting plate 6 and the necking section 12, and the adjusting plate and the sealing plate 5 are all fixedly connected by welding.

[0070] The implementation principle of the split structure of the super-large wind turbine duct frame foundation in the embodiment of the present application is as follows:

[0071] The split structure of the super-large wind turbine jacket foundation is divided into an upper structure 1 and a lower structure 2, which are processed and transported separately, reducing the difficulty of processing and transportation; first, the lower structure 2 is hoisted to be fixedly installed on the suction pile 3, and then the upper structure 1 is hoisted to make the multiple insertion sections 11 and the multiple connection sections 21 plug and match, and the multiple limit plates 6 make the plug-in and matching process of the insertion sections 11 and the connection sections 21 more convenient and quick; after the multiple insertion sections 11 and the multiple connection sections 21 are plugged and matched, grouting material is poured into the remaining space in the slot 211 through the multiple grouting pipelines 8. After the grouting material solidifies, the upper structure 1 and the lower structure 2 can be fixedly connected, thereby improving the overall structural stability of the split structure of the super-large wind turbine jacket foundation.

[0072] Example 2:

[0073] Reference Figure 4 and Figure 6 The difference between this embodiment and embodiment 2 is that the super-large wind turbine duct frame foundation split structure further includes a plurality of limiting components 9.

[0074] Reference Figure 6The limiting assembly 9 is installed on the limiting plate 6, and a plurality of limiting assemblies 9 correspond to a plurality of limiting plates 6 one by one. The limiting assembly 9 includes a first movable member 91, a second movable member 92 and an elastic member 93. The limiting plate 6 is provided with a sliding groove 63 and a yielding groove 64 on the limiting portion 62. The sliding groove 63 is located at the end of the limiting portion 62 away from the insertion section 11 and forms an opening at an end face of the limiting portion 62 away from the insertion section 11, and the sliding groove 63 is located on the side of the guide surface 621 close to the connecting portion 61; the yielding groove 64 is located at the end of the limiting portion 62 close to the insertion section 11 and forms an opening at an end face of the limiting portion 62 close to the insertion section 11, and the sliding groove 63 is communicated with the yielding groove 64. The second movable member 92 is located in the sliding groove 63, and the second movable member 92 is slidably connected to the limiting plate 6 along the trajectory of the sliding groove 63. The sliding direction of the second movable member 92 is parallel to the length direction of the limiting portion 62.

[0075] The first movable member 91 is located on a side of the second movable member 92 that is closer to the insertion section 11. The ends of the elastic member 93 are fixedly connected to the second movable member 92 and the first movable member 91, respectively. The elastic member 93 drives the second movable member 92 toward the first movable member 91 and then maintains contact therewith. In this embodiment, the elastic member 93 is preferably an elastic cord.

[0076] The sliding movement of the first movable member 91 on the limiting portion 62 is limited. When the first movable member 91 slides toward the connecting portion 61 to its limit position, the first movable member 91 is located at the end of the limiting portion 62 near the connecting portion 61. When the first movable member 91 slides away from the connecting portion 61 to its limit position, the first movable member 91 is located at the end of the limiting portion 62 near the guide surface 621. When the first movable member 91 is held in contact with the second movable member 92 under the action of the elastic member 93, one end of the first movable member 91 is located in the clearance groove 64, and the other end of the first movable member 91 is in contact with the outer surface of the insertion section 11. During the process of the second movable member 92 sliding and driving the first movable member 91, the first movable member 91 still remains in contact with the outer surface of the insertion section 11.

[0077] The limiting assembly 9 also includes a fixing member 94. The limiting plate 6 further defines a mounting slot 65 on the limiting portion 62 that is adapted to accommodate the fixing member 94. The fixing member 94 is removably connected to the limiting plate 6 by plugging. When the second movable member 92 slides to its limit position away from the connecting portion 61, the fixing member 94 is inserted into the mounting slot 65. The fixing member 94 abuts against the end of the second movable member 92 that is closer to the connecting portion 61, thereby restricting the second movable member 92 from sliding toward the connecting portion 61.

[0078] A slot 911 for the end of the connecting section 21 to be inserted into is provided at the end of the first movable part 91 facing away from the connecting part 61. When the insertion section 11 enters the slot 211 under the guidance of several limiting plates 6, the slots 911 on several first movable parts 91 can all be engaged with the connecting section 21.

[0079] Only when the second movable members 92 are all fixed in position by the corresponding fixing members 94 can the insertion section 11 begin to engage with the connecting section 21. As the insertion section 11 is gradually inserted into the slot 211, the connecting section 21 is simultaneously engaged with the slots 911 on the first movable members 91; then, as the insertion section 11 gradually penetrates deeper into the slot 211, the connecting section 21 will simultaneously drive the first movable members 91 to move toward the connecting portion 61. After the first movable member 91 separates from the second movable member 92, it leaves the clearance slot 64. The elastic member 93 is stretched and passes through the clearance slot 64 due to the movement of the first movable member 91. The stretched elastic member 93 has a tendency to drive the first movable member 91 to move closer to the second movable member 92. The simultaneous action of the forces of the elastic members 93 can enable the insertion section 11 to automatically adjust its horizontal position during the engagement with the connecting section 21, aligning the insertion section 11 with the connecting section 21 and improving the engagement quality between the insertion section 11 and the connecting section 21.

[0080] After the insertion section 11 and the connecting section 21 are fully plugged in, the positions of the first movable members 91 are fixed. A first overflow hole 912 is defined on the first movable member 91. One end of the first overflow hole 912 extends through the end of the first movable member 91 closest to the insertion section 11, with its opening oriented parallel to the axis of the insertion section 11, away from the connecting portion 61. The other end of the first overflow hole 912 extends through the end of the first movable member 91 away from the insertion section 11, with its opening oriented parallel to the length of the connecting portion 61. During the grouting process, when the grouting material is about to overflow from the opening of the slot 211, the grouting material in the slot 211 can enter the first overflow hole 912 and flow out in a direction away from the slot 211.

[0081] The second movable part 92 is provided with a second overflow hole 921 having the same radial size as the first overflow hole 912. The second overflow hole 921 passes through both ends of the second movable part 92 in a direction parallel to the length direction of the connecting part 61. When the second movable part 92 is kept against the first movable part 91 under the action of the elastic part 93, the second overflow hole 921 is communicated with the first overflow hole 912 and the axis of the second overflow hole 921 coincides with the axis of the first overflow hole 912.

[0082] After the insertion section 11 and the connecting section 21 are plugged in and matched, the fixing part 94 is removed, and the second movable part 92 originally fixed by the fixing part 94 will slide toward the connecting part 61 under the action of the elastic part 93 until the second movable part 92 is against the first movable part 91, and the second overflow hole 921 is connected to the first overflow hole 912.

[0083] After the second movable members 92 are all in contact with the corresponding first movable members 91, grouting is started. After grouting, the grouting material that enters the first overflow hole 912 will eventually overflow through the corresponding second overflow hole 921. By observing the overflow of the grouting material from the second overflow hole 921, it can be determined whether the grouting material poured into the remaining space in the slot 211 is sufficient.

[0084] The grouting material overflowing from the second overflow hole will eventually flow into the sliding groove 63, making it easier for construction workers to clean it up and reducing the scope of pollution caused by the overflow of the grouting material.

[0085] The implementation principle of the split structure of the super-large wind turbine duct frame foundation in the embodiment of the present application is as follows:

[0086] When the insertion section 11 and the connecting section 21 are plugged together, in addition to the plurality of limit plates 6, the plurality of limit assemblies 9 can further play a guiding role, so that the insertion section 11 and the connecting section 21 are aligned, thereby improving the plugging quality of the insertion section 11 and the connecting section 21;

[0087] During the grouting process, after the grouting material fills the remaining space in the slot 211, the excess grouting material will overflow through the first overflow hole 912 and the second overflow hole 921 in turn. By observing the overflow of the grouting material at several second overflow holes 921, it can be determined whether the grouting is completed.

[0088] The present application also discloses a construction method for installing the aforementioned super-large wind turbine duct frame foundation split structure, and the specific steps are as follows:

[0089] S1, hoisting the lower structure 2 so that one end of the lower structure 2 away from the connecting section 21 is fixedly connected to the suction pile 3;

[0090] After the upper structure 1 and the lower structure 2 are processed at the processing site, they are transported to the construction site together with the corresponding multiple adjustment parts 7, multiple limit plates 6 and / or multiple limit assemblies 9 by a transport ship. Then, the lower structure 2 is hoisted by a crane ship and the bottom of the lower structure 2 is fixedly connected to the suction pile 3.

[0091] S2, fixing the plurality of limit plates 6 to the insertion section 11;

[0092] In one embodiment, the reserved margin at the end of the connecting portion 61 of the limiting plate 6 is cut off according to the condition of the corresponding insertion section 11, and the limiting plates 6 are welded and fixed to the necking section 12 of the upper structure 1 one by one, so that the length direction of the limiting portion 62 of the limiting plate 6 is parallel to the axis of the insertion section 11;

[0093] In one embodiment, after the reserved margin at the end of the connecting portion 61 of the limiting plate 6 is cut off according to the situation of the corresponding insertion section 11, the limiting assembly 9 is installed on the corresponding limiting plate 6, and the position of the second movable member 92 is fixed by the fixing member 94; when the first movable member 91 is kept in contact with the second movable member 92 under the action of the elastic member 93, the connecting portion 61 of the limiting plate 6 is welded and fixed to the necking section 12 in a state where the first movable member 91 is kept in contact with the peripheral side of the insertion section 11, and the length direction of the limiting portion 62 of the limiting plate 6 is parallel to the axis of the insertion section 11;

[0094] In one embodiment, after the limiting plate 6 / limiting plate 6 and limiting assembly 9 are installed on the upper structure 1, the thickness of the corresponding adjusting member 7 is adjusted based on the position of the multiple connecting sections 21 after the lower structure 2 is installed, and the adjusting member 7 is welded and fixed to the end of the corresponding insertion section 11, so that the insertion section 11 and the connecting section 21 are plugged and matched until the adjusting member 7 and the groove wall at the bottom of the slot 211 are abutted, and the upper structure 1 has a high verticality;

[0095] S3, hoisting the upper structure 1 so that the plurality of insertion sections 11 are plugged into and fitted with the corresponding connection sections 21 under the guidance of the plurality of limiting plates 6;

[0096] In one embodiment, the superstructure 1 is lifted by a crane vessel so that the superstructure 1 is located above the substructure 2, and then the superstructure 1 is controlled to move downward. During the process of plugging and matching the insertion section 11 with the connecting section 21, under the guidance of the multiple limit plates 6 / multiple limit plates 6 and multiple limit assemblies 9, the axis of the insertion section 11 is gradually aligned with the axis of the connecting section 21; after the multiple insertion sections 11 on the superstructure 1 are plugged and matched with the corresponding connecting sections 21, the crane vessel gradually reduces the lifting force, gradually transferring part of the weight of the superstructure 1 to the substructure 2, and the weight transfer ratio is determined according to the sea conditions at the installation site, and the transfer ratio is higher when the sea conditions are severe;

[0097] S4, pouring grouting material into the remaining space of the slot 211 through the grouting pipeline 8, observing the overflow of the grouting material from the slot 211, and stopping grouting when the grouting material overflows;

[0098] In one embodiment, after the upper structure 1 is stably installed on the lower structure 2, grouting material is filled into the remaining space in the slot 211 through the multiple grouting pipes 8 inside the upper structure 1, and the overflow of the grouting material from the opening of the slot 211 is observed to determine whether the grouting material is sufficiently filled;

[0099] In one embodiment, after the upper structure 1 is stably installed on the lower structure 2, the fixing members 94 are removed, and the second movable member 92 slides upward under the action of the stretched elastic member 93 until it abuts against the first movable member 91, and the second overflow hole 921 is connected to the first overflow hole 912, and then the fixing members 94 are reinstalled; then, grouting material is filled into the remaining space in the slot 211 through the multiple grouting pipelines 8 inside the upper structure 1, and the overflow of grouting material from each second overflow hole 921 is observed to determine whether the grouting material is sufficiently filled;

[0100] S5. Wipe off the overflowed grouting material, and wait for the grouting material to solidify. Then, the upper structure 1 is installed on the lower structure 2, and the construction is completed.

[0101] After the grouting is completed, wipe off the overflowed grouting material and wait for the grouting material to solidify; after the grouting material solidifies, remove the slings on the upper structure 1 to complete the foundation installation.

[0102] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A super-large wind turbine duct frame foundation split structure, characterized in that: The invention comprises an upper structure (1) and a lower structure (2), wherein one end of the upper structure (1) has a plurality of insertion sections (11), and one end of the lower structure (2) has a plurality of connecting sections (21), wherein the connecting sections (21) have slots (211) for inserting the insertion sections (11), and the plurality of insertion sections (11) correspond one to one with the plurality of connecting sections (21); It also includes a plurality of limiting plates (6), wherein the limiting plates (6) include a connecting portion (61) and a limiting portion (62), wherein the connecting portion (61) is connected to the upper structure (1), and the limiting portion (62) is located on one side of the insertion section (11), and the length direction of the limiting portion (62) is parallel to the length direction of the insertion section (11), and each of the insertion sections (11) is provided with a plurality of limiting plates (6); It also includes a plurality of grouting pipelines (8), wherein the grouting pipelines (8) are arranged on the upper structure (1), and one end of the grouting pipelines (8) is close to the insertion section (11). When the insertion section (11) is plugged into the connection section (21), the grouting pipelines (8) are in communication with the slot (211); It also includes a plurality of limiting components (9), wherein the plurality of limiting components (9) correspond one to one with the plurality of limiting plates (6); The limiting assembly (9) includes a first movable member (91), a second movable member (92) and an elastic member (93), wherein the first movable member (91) is located between the limiting portion (62) and the insertion section (11) and is arranged on the limiting portion (62), and the second movable member (92) is arranged on the limiting portion (62). Both ends of the elastic member (93) are respectively connected to the first movable member (91) and the second movable member (92), and the elastic member (93) drives the first movable member (91) and the second movable member (92) to maintain contact with each other; A slot (911) is provided on the first movable member (91), and when the insertion section (11) is inserted into the slot (211), the connecting section (21) is engaged with the slot (911) and drives the first movable member (91) to move toward the connecting portion (61); The limiting assembly (9) further includes a plurality of fixing members (94), and when the second movable member (92) slides in a direction away from the connecting portion (61) to an extreme position, the fixing members (94) fix the position of the second movable member (92); The simultaneous action of the forces of the plurality of elastic members (93) enables the insertion section (11) and the connection section (21) to self-adjust their positions in the horizontal direction during the process of plugging and fitting, so that the insertion section (11) and the connection section (21) are aligned.

2. The super-large wind turbine duct frame foundation split structure according to claim 1 is characterized in that: The end of the limiting portion (62) away from the connecting portion (61) has a guide surface (621), the guide surface (621) is an inclined surface, and the end of the guide surface (621) close to the insertion section (11) is an inclined upper end.

3. The super-large wind turbine duct frame foundation split structure according to claim 2 is characterized in that: After the insertion section (11) and the connection section (21) are plugged into each other, when the connection section (21) and the limiting portion (62) abut against each other, a gap exists between the insertion section (11) and the peripheral groove wall of the slot (211).

4. The super-large wind turbine duct frame foundation split structure according to claim 1 is characterized in that: When the elastic member (93) drives the first movable member (91) and the second movable member (92) to maintain contact with each other, the first movable member (91) and the insertion section (11) contact each other.

5. The super-large wind turbine duct frame foundation split structure according to claim 1 is characterized in that: A first overflow hole (912) is provided on the first movable member (91). After the insertion section (11) and the connection section (21) are plugged into each other, one end of the first overflow hole (912) communicates with the slot (211), and the other end of the first overflow hole (912) passes through one end of the first movable member (91) close to the limiting plate (6).

6. The super-large wind turbine duct frame foundation split structure according to claim 5, characterized in that: The limiting plate (6) is provided with a sliding groove (63) and a clearance groove (64) along its own length direction on the limiting portion (62); the second movable member (92) is located in the sliding groove (63) and is slidably connected to the limiting portion (62); when the first movable member (91) and the second movable member (92) are in contact with each other, the first movable member (91) is located in the clearance groove (64); when the first movable member (91) and the second movable member (92) are separated, the elastic member (93) passes through the clearance groove (64); The fixing member (94) is detachably connected to the limiting plate (6); A second overflow hole (921) is provided on the second movable member (92), one end of the second overflow hole (921) is communicated with the paving groove (64), and the other end of the second overflow hole (921) passes through an end of the second movable member (92) away from the paving groove (64). When the elastic member (93) drives the first movable member (91) and the second movable member (92) to abut against each other, the second overflow hole (921) is communicated with the first overflow hole (912).

7. The super-large wind turbine duct frame foundation split structure according to claim 1 is characterized in that: It also includes a plurality of thickness-adjustable adjusting members (7), wherein the adjusting members (7) are arranged at the end of the insertion section (11). After the insertion section (11) and the connecting section (21) are plugged into each other, the adjusting members (7) abut against the groove wall at the bottom of the slot (211).

8. The super-large wind turbine duct frame foundation split structure according to claim 1 is characterized in that: The insertion section (11) has a plurality of shear keys (10) on its peripheral surface, and the connection section (21) also has a plurality of shear keys (10) on its peripheral groove wall of the slot (211); after the insertion section (11) and the connection section (21) are plugged into each other, the plurality of shear keys (10) on the insertion section (11) and the plurality of shear keys (10) on the connection section (21) are staggered.

9. A construction method, characterized in that: The specific steps for installing the super-large wind turbine duct frame foundation split structure according to any one of claims 1 to 8 are as follows: S1, hoisting the lower structure (2) so that one end of the lower structure (2) away from the connecting section (21) is fixedly connected to the suction pile; S2, fixedly connecting a plurality of the limiting plates (6) to the insertion section (11); S3, hoisting the upper structure (1) so that the plurality of insertion sections (11) are plugged into and matched with the corresponding connection sections (21) under the guidance of the plurality of limiting plates (6); S4, pouring grouting material into the remaining space of the slot (211) through the grouting pipeline (8), observing the overflow of the grouting material from the slot (211), and stopping grouting when the grouting material overflows; S5. Wipe the overflowed grouting material, and wait for the grouting material to solidify. Then, the upper structure (1) is installed on the lower structure (2), and the construction is completed.

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