Jacket foundation and jacket foundation construction method

Abstract

The invention belongs to the technical field of offshore wind power generation, and discloses a jacket foundation and a jacket foundation construction method. The jacket foundation comprises a main frame body and a supporting structure, the main frame body comprises at least three supporting legs, the at least three supporting legs are arranged around a fan tower barrel, each supporting leg comprises a plurality of connecting sections arranged in the length direction, a first connecting part is connected between every two adjacent connecting sections, the connecting section on the topmost layer is used for being connected with the fan tower barrel, and the connecting section on the topmost layer is used for being connected with the fan tower barrel. The bottommost connecting section is used for being connected with a steel pipe pile fixed to the seabed. The supporting structure is arranged between every two adjacent supporting legs in the direction surrounding the fan tower barrel, the supporting structure comprises a plurality of supporting rod sets arranged in the height direction, the supporting rod sets are connected with the first connecting parts of the supporting legs on the two sides, first pouring spaces are formed in the first connecting parts, and the first pouring spaces are filled with grouting materials. The jacket foundation has high impact-shear bearing capacity and fatigue resistance, and safety and stability of fan operation are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power generation, and in particular to a conductor frame foundation and a conductor frame foundation construction method. Background Art

[0002] At present, the construction of offshore wind farms is gradually advancing towards the deep sea. Combined with the development of offshore wind power, the jacket foundation has been widely developed in the deep sea due to its spatial truss structure. However, the jacket foundation has the following problems in the promotion process: First, the jacket pipe nodes are numerous and the node types are complex. The large wave loads in the deep sea and the increasing wind turbine loads will make the force of the pipe nodes more complicated, and put forward higher requirements for the ultimate bearing capacity of the pipe nodes; if the node bearing capacity is simply increased by increasing the size of the node rod (such as wall thickness, diameter), the overall weight of the foundation structure will be greater, which is not conducive to design optimization and subsequent construction, transportation and hoisting, and is not economical. Second, there are many welds in the jacket pipe nodes. Under the influence of large external forces, fatigue stress is more concentrated. The increasing fatigue load will seriously affect the fatigue resistance and service life of the jacket foundation. Third, the pipe node is one of the important connecting components of the jacket foundation. After being subjected to accidental loads such as ship collisions and ice floes, it is easy to be damaged or even fail, which will pose a serious threat to the overall stability and safety of the jacket structure.

[0003] Therefore, a jacket foundation is provided to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a jacket foundation and a jacket foundation construction method, which can improve the bearing capacity of the jacket foundation, so as to improve the stability and safety of wind turbines operating in deep sea environments.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The jacket foundation includes:

[0007] A main frame, wherein the main frame comprises at least three legs, wherein at least three legs are arranged around a wind turbine tower, each leg comprises a plurality of connecting sections arranged along a length direction, a first connecting portion is connected between two adjacent connecting sections, the connecting section at the top layer is used to connect to the wind turbine tower, and the connecting section at the bottom layer is used to connect to a steel pipe pile fixed on the seabed;

[0008] A support structure, wherein the support structure is arranged between two adjacent legs along the direction surrounding the wind turbine tower, and the support structure includes a plurality of support rod groups arranged along the height direction, and the support rod groups are connected to the first connecting parts of the legs on both sides, and the first connecting part has a first pouring space inside, and the first pouring space is filled with grouting material.

[0009] Preferably, the first connecting portion comprises a first main pipe and a first branch pipe, the first branch pipe is arranged on the first main pipe, the first main pipe is welded to the connecting section, and the first branch pipe is welded to the supporting rod group;

[0010] The first main pipe has a first main inner cavity, the first branch pipe has a first inner cavity, the first main inner cavity is connected to the first inner cavity, the first main inner cavity and the first inner cavity constitute the first perfusion space, and both ends of the first main inner cavity and the end of the first inner cavity are provided with sealing plates.

[0011] Preferably, the jacket foundation further comprises a grouting assembly, wherein the grouting assembly comprises a first grouting pipeline, wherein the first grouting pipeline is connected to the first grouting space, and the first grouting pipeline is used for grouting the first grouting space.

[0012] Preferably, the grouting assembly further comprises a first grouting ring pipe, which is arranged on the inner wall of the first main pipe, has a plurality of first grouting ports formed therein, and is connected to the first grouting pipeline.

[0013] Preferably, the supporting leg further comprises two second connecting parts, which are respectively arranged on the connecting section at the top layer and the connecting section at the bottom layer, the uppermost supporting rod group is connected to the upper second connecting part, and the lowermost supporting rod group is connected to the lower second connecting part;

[0014] The second connection portion has a second pouring space inside, and the second pouring space is filled with the grouting material.

[0015] Preferably, the support rod set includes a third connecting portion and two cross-arranged supporting members, and ends of the supporting members are connected to the first connecting portion or the second connecting portion;

[0016] The two support members are connected via the third connection portion, and the third connection portion has a third pouring space, and the third pouring space is filled with the grouting material.

[0017] Preferably, each of the support members includes two oblique support rods, one end of each of the oblique support rods is connected to the third connection portion, and the other end of each of the oblique support rods is connected to the first connection portion or the second connection portion.

[0018] Preferably, the third connecting portion comprises a third main pipe and two third branch pipes, the two third branch pipes are arranged on the third main pipe, both ends of the third main pipe are respectively welded to the two diagonal braces of one of the supporting members, and the two third branch pipes are respectively welded to the two diagonal braces of the other supporting member;

[0019] The third main pipe has a third main inner cavity, and the third branch pipe has a third inner cavity. The third main inner cavity is connected with the two third inner cavities respectively. The third main inner cavity and the two third inner cavities constitute the third perfusion space. Both ends of the third main inner cavity and the end of the third inner cavity are provided with sealing plates.

[0020] Preferably, a stiffening ring is provided in the first pouring space.

[0021] The jacket foundation construction method, using the jacket foundation above, includes the following steps:

[0022] S1, welding the support rod group to the first connecting parts on the supporting legs at both sides to form a support structure;

[0023] S2, hoisting the assembled main frame to a designated location, and fixing the bottom connection section to the steel pipe piles pre-buried in the seabed;

[0024] S3. pouring grouting material into the first pouring space.

[0025] The beneficial effects of the present invention are:

[0026] The jacket foundation provided by the present invention has a main frame body including at least three legs arranged around the wind turbine tower, each leg including a plurality of connecting sections arranged along the length direction, two adjacent connecting sections being connected by a first connecting portion, wherein the topmost connecting section is used to connect with the wind turbine tower, and the bottommost connecting section is used to connect with the steel pipe piles on the seabed, so that the main frame body can stably support the wind turbine tower above; since a supporting structure is also provided between two adjacent legs, the supporting structure includes a plurality of supporting rod groups arranged along the height direction, and the supporting rod groups can improve the stability of the main frame body and carrying capacity, thereby ensuring the safe operation of the wind turbine in a deep sea environment; since the support rod group is connected to the first connecting part of the leg, adjacent connecting sections on the leg are also connected through the first connecting part, and the first connecting part has a first pouring space, and the first pouring space is filled with grouting material, and the grouting material can be combined with the first connecting part to improve the carrying capacity and connection strength of the first connecting part. Therefore, the first connecting part as the connecting node between the leg and the support rod group has strong shear resistance and fatigue resistance, which greatly improves the safety and stability of the wind turbine in a deep sea environment.

[0027] By using the jacket foundation construction method, the connecting sections of the legs are connected by the first connecting part, the support rod group is also connected to the first connecting part, and after the connection is completed, grouting material is poured into the first pouring space of the first connecting part to fill it densely, thereby forming a combined structure of steel pipe-grouting material. Therefore, the first connecting part, as the connecting node between the legs and the support rod group, has strong shear bearing capacity and fatigue resistance, which greatly improves the safety and stability of the wind turbine in the deep sea environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a structural schematic diagram of a jacket foundation provided by a specific embodiment of the present invention;

[0029] Figure 2 is a schematic structural diagram of a first connecting portion from a first viewing angle provided in a specific embodiment of the present invention;

[0030] Figure 3 is a schematic structural diagram of a first connecting portion from a second viewing angle provided in a specific embodiment of the present invention;

[0031] Figure 4 is a cross-sectional view of a first connecting portion provided in a specific embodiment of the present invention;

[0032] Figure 5 is a structural schematic diagram of a second connecting portion provided in a specific embodiment of the present invention;

[0033] Figure 6 is a cross-sectional view of a second connecting portion provided in a specific embodiment of the present invention;

[0034] Figure 7 is a structural schematic diagram of a third connecting portion provided in a specific embodiment of the present invention;

[0035] Figure 8 is a cross-sectional view of a third connecting portion provided in a specific embodiment of the present invention;

[0036] Fig. 9 It is a structural schematic diagram of a sealing plate provided in a specific embodiment of the present invention;

[0037] Fig.10 It is a side view of a sealing plate provided in a specific embodiment of the present invention.

[0038] In the figure:

[0039] 1-leg; 11-connecting section; 12-first connecting part; 121-first perfusion space; 1211-first main inner cavity; 1212-first inner cavity; 122-first main pipe; 123-first branch pipe; 13-second connecting part; 131-second perfusion space; 1311-second main inner cavity; 1312-second inner cavity; 132-second main pipe; 133-second branch pipe;

[0040] 2-support rod group; 21-support member; 211-diagonal support rod; 22-third connecting part; 221-third perfusion space; 2211-third main inner cavity; 2212-third inner cavity; 222-third main pipe; 223-third branch pipe;

[0041] 3-sealing plate; 31-plate body; 32-upper bracket; 33-lower bracket; 34-reinforcement rib;

[0042] 4- grouting assembly; 41- first grouting pipeline; 42- first grouting ring pipe; 421- first grouting port; 43- second grouting pipeline; 44- second grouting ring pipe; 441- second grouting port;

[0043] 5- Stiffening ring. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0045] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0048] like Figures 1 to 4As shown, the present invention provides a jacket foundation. The jacket foundation includes a main frame and a support structure, the main frame includes at least three legs 1, at least three legs 1 are arranged around the wind turbine tower, each leg 1 includes a plurality of connecting sections 11 arranged along the length direction, a first connecting portion 12 is connected between two adjacent connecting sections 11, the topmost connecting section 11 is used to connect with the wind turbine tower, and the bottommost connecting section 11 is used to connect with a steel pipe pile fixed on the seabed; the support structure is arranged between two adjacent legs 1 in the direction of surrounding the wind turbine tower, the support structure includes a plurality of support rod groups 2 arranged along the height direction, the support rod groups 2 are connected to the first connecting portions 12 of the legs 1 on both sides, the first connecting portion 12 has a first pouring space 121 inside, and the first pouring space 121 is filled with grouting material. In this embodiment, the main frame includes at least three legs 1 arranged around the wind turbine tower, each leg 1 includes a plurality of connecting sections 11 arranged along the length direction, and two adjacent connecting sections 11 are connected by a first connecting portion 12, wherein the topmost connecting section 11 is used to connect to the wind turbine tower, and the bottommost connecting section 11 is used to connect to the steel pipe piles on the seabed, so the main frame can stably support the wind turbine tower above; since a supporting structure is also provided between two adjacent legs 1, the supporting structure includes a plurality of supporting rod groups 2 arranged along the height direction, and the supporting rod groups 2 can improve the stability and bearing capacity of the main frame, Thus, the operation safety of the wind turbine in the deep sea environment is ensured; since the support rod group 2 is connected to the first connection part 12 of the leg 1, the adjacent connection sections 11 on the leg 1 are also connected through the first connection part 12, and the first connection part 12 has a first pouring space 121, and the first pouring space 121 is filled with grouting material, and the grouting material can be engaged with the first connection part 12, thereby improving the bearing capacity and connection strength of the first connection part 12. Therefore, the first connection part 12, as the connection node between the leg 1 and the support rod group 2, has a strong anti-shear bearing beam and anti-fatigue performance, which greatly improves the operation safety of the wind turbine in the deep sea environment. Specifically, there are four legs 1, and the four legs 1 are arranged around the wind turbine tower. As the height increases, the distance between two adjacent legs 1 in the direction around the wind turbine tower gradually decreases, that is, the side of the main frame is a trapezoid; the grouting material is prepared from cement, fine aggregate and gel material, etc., and is a commonly used building material in this field.

[0049] Furthermore, if Figures 2 to 4As shown, the first connecting part 12 includes a first main pipe 122 and a first branch pipe 123, the first branch pipe 123 is arranged on the first main pipe 122, the first main pipe 122 is welded to the connecting section 11, and the first branch pipe 123 is welded to the support rod group 2; the first main pipe 122 has a first main inner cavity 1211, the first branch pipe 123 has a first inner cavity 1212, the first main inner cavity 1211 is connected to the first inner cavity 1212, the first main inner cavity 1211 and the first inner cavity 1212 constitute a first perfusion space 121, and both ends of the first main inner cavity 1211 and the end of the first inner cavity 1212 are provided with sealing plates 3. In this embodiment, the support rod group 2 includes cross-arranged support members 21, each first connection portion 12 is welded to two upper and lower adjacent connection sections 11, and is also welded to a plurality of support members 21; specifically, the first connection portion 12 is welded by a first main pipe 122 and a plurality of first branch pipes 123, and the first main inner cavity 1211 is respectively connected to a plurality of first inner cavities 1212; the two ends of the first main pipe 122 are respectively welded to the two upper and lower adjacent connection sections 11, and the plurality of first branch pipes 123 are respectively welded to the plurality of first branch pipes 123. The support members 21 are welded one by one to form a connection node between the connecting section 11 and the support rod group 2; both ends of the first main inner cavity 1211 and the end of the first inner cavity 1212 are welded with sealing plates 3, so that the first main inner cavity 1211 and several first inner cavities 1212 are enclosed into a closed first pouring space 121, and the sealing plates 3 seal the first pouring space 121 to prevent the grouting material poured in the first pouring space 121 from leaking, thereby ensuring the grouting quality of the first connecting part 12.

[0050] Specifically, Figure 2 As shown, the jacket foundation further includes a grouting assembly 4, which includes a first grouting pipeline 41, which is connected to the first grouting space 121, and is used to grout the first grouting space 121. In this embodiment, the first grouting pipeline 41 includes a first main pipe and a first branch pipe arranged on the first main pipe, the first main pipe is arranged along the leg 1, and the first branch pipe is provided with a plurality of first grouting spaces 121 respectively connected to a plurality of first connecting portions 12; the top end of the first main pipe is used to connect with the grouting material pumping equipment, so as to transport the grouting material into the first grouting space 121; specifically, the main frame has four legs 1, and four first grouting pipelines 41 are arranged on the main frame corresponding to the four legs, and each first grouting pipeline 41 is used to transport the grouting material to all the first connecting portions 12 on one of the legs 1.

[0051] Specifically, Figure 2 and Figure 4As shown, the grouting assembly 4 also includes a first grouting ring pipe 42 , which is arranged on the inner wall of the first main pipe 122 , and has a plurality of first grouting ports 421 , and is connected to the first grouting pipeline 41 . In this embodiment, the first grouting ring tube 42 is an annular pipe, and the first grouting ring tube 42 is welded to the inner wall of the first main pipe 122. The first branch pipe of the first grouting pipeline 41 passes through the first main pipe 122 and is connected to the first grouting ring tube 42, so the grouting material can enter the first grouting ring tube 42 through the first grouting pipeline 41; the first grouting ring tube 42 is provided with a first grouting port 421 on the inner side away from the first main pipe 122, and the grouting material entering the first grouting ring tube 42 will be filled into the first pouring space 121 through the first grouting port 421; specifically, a plurality of first grouting ports 421 are evenly provided on the first grouting ring tube 42, so the grouting material can be evenly poured into the first pouring space 121 through the plurality of first grouting ports 421, thereby avoiding uneven pouring and affecting the grouting quality of the first connecting part 12.

[0052] Further, the leg 1 further includes two second connecting parts 13, which are respectively arranged on the topmost connecting section 11 and the bottommost connecting section 11, the topmost supporting rod group 2 is connected to the upper second connecting part 13, and the bottommost supporting rod group 2 is connected to the lower second connecting part 13; the second connecting part 13 has a second pouring space 131 inside, and the second pouring space 131 is filled with grouting material. In this embodiment, each leg 1 is provided with two second connecting parts 13, which are respectively arranged at the ends of the topmost connecting section 11 and the bottommost connecting section 11; the upper second connecting part 13 is used to connect the topmost connecting section 11, the uppermost supporting rod group 2 and the deck bearing the wind turbine tower, and the lower second connecting part 13 is used to connect the bottommost connecting section 11, the lowermost supporting rod group 2 and the base for connecting with the steel pipe pile. The second pouring space 131 is also filled with grouting material, which can be combined with the second connecting part 13, thereby improving the bearing capacity and connection strength of the second connecting part 13.

[0053] Specifically, Figure 1 , Figure 7 as well as Figure 8As shown, the support rod group 2 includes a third connection part 22 and two cross-arranged support members 21, the ends of the support members 21 are connected to the first connection part 12 or the second connection part 13; the two support members 21 are connected through the third connection part 22, the third connection part 22 has a third pouring space 221, and the third pouring space 221 is filled with grouting material. In this embodiment, the middle parts of the two support members 21 are connected to form an X shape through the third connection part 22, and the two ends of the support member 21 are welded to the first connection part 12 or the second connection part 13 on the two side legs 1; the two support members 21 are welded to the third connection part 22, the third connection part 22 has a third pouring space 221, and the third pouring space 221 is also filled with grouting material, and the grouting material can be combined with the third connection part 22, thereby improving the bearing capacity and connection strength of the third connection part 22.

[0054] Specifically, Figure 1 , Figure 7 as well as Figure 8 As shown, each support member 21 includes two diagonal braces 211, one end of the diagonal braces 211 is connected to the third connection portion 22, and the other end of the diagonal braces 211 is connected to the first connection portion 12 or the second connection portion 13. In this embodiment, each support member 21 is composed of two diagonal braces 211, one end of the four diagonal braces 211 is welded to the third connection portion 22, and the other end of the four diagonal braces 211 is respectively welded to the first connection portion 12 or the second connection portion 13.

[0055] Specifically, Figure 1 , Figure 7 as well as Figure 8As shown, the third connecting part 22 includes a third main pipe 222 and two third branch pipes 223, the two third branch pipes 223 are arranged on the third main pipe 222, the two ends of the third main pipe 222 are respectively welded to the two diagonal struts 211 of one of the support members 21, and the two third branch pipes 223 are respectively welded to the two diagonal struts 211 of the other support member 21; the third main pipe 222 has a third main inner cavity 2211, the third branch pipe 223 has a third inner cavity 2212, the third main inner cavity 2211 is connected with the two third inner cavities 2212 respectively, the third main inner cavity 2211 and the two third inner cavities 2212 constitute the third perfusion space 221, and the two ends of the third main inner cavity 2211 and the end of the third inner cavity 2212 are both provided with sealing plates 3. In this embodiment, the third connecting portion 22 is an X-shaped structure welded by a third main pipe 222 and two third branch pipes 223, wherein the two diagonal struts 211 of one support member 21 are welded to the two ends of the third main pipe 222, and the two diagonal struts 211 of the other support member 21 are respectively welded to the ends of the two third branch pipes 223, thereby forming a support rod group 2; the third main inner cavity 2211 is respectively connected to the two third inner cavities 2212, and both ends of the third main inner cavity 2211 and the end of the third inner cavity 2212 are provided with sealing plates 3, thereby enclosing the third main inner cavity 2211 and the two third inner cavities 2212 to form a closed third perfusion space 221.

[0056] Specifically, the first connection part 12 is welded by a first main pipe 122 and four first branch pipes 123, and the four first branch pipes 123 are respectively welded to the ends of the diagonal braces 211 of the supporting structures on both sides. The second connection part 13 is a Y-shaped structure welded by a second main pipe 132 and two second branch pipes 133, the second main pipe 132 is welded to the connection section 11, and the two second branch pipes 133 are respectively welded to the diagonal braces 211 at the uppermost or lowermost ends of the supporting structures on both sides; the second main pipe 132 has a second main inner cavity 1311, and the two second branch pipes 133 both have a secondary inner cavity 1312, the second main inner cavity 1311 and the two secondary inner cavities 1312 are respectively connected, and the two ends of the second main inner cavity 1311 and the end of the second inner cavity 1312 are both provided with a baffle plate 3, so that the second main inner cavity 1311 and the two secondary inner cavities 1312 are enclosed to form a closed second perfusion space 131.

[0057] Specifically, the second grouting space 131 is connected to the first branch pipe of the first grouting pipeline 41, and a grouting material pumping equipment is arranged on the deck supporting the wind turbine tower, and the grouting material pumping equipment transports grouting material to the second grouting space 131 through the first grouting pipeline 41; the first diameter pipeline 41 also includes a first side pipe, which is connected to the first branch pipe, and the first side pipe is connected to the third grouting space 221, so the grouting material can also be transported to the third grouting space 221 through the first grouting pipeline 41.

[0058] Specifically, the second main pipe 132 and the third main pipe 222 are also respectively provided with a first grouting ring pipe 42, which is welded on the inner walls of the second main pipe 132 and the third main pipe 222, the first branch pipe passes through the second main pipe 132 to be connected with the first grouting ring pipe 42, and the first side pipe passes through the third main pipe 222 to be connected with the first grouting ring pipe 42; a plurality of first grouting ports 421 are evenly spaced apart on the inner side of the first grouting ring pipe 42 away from the second main pipe 132 or the third main pipe 222.

[0059] Furthermore, the grouting assembly 4 also includes a second grouting pipeline 43 and a second grouting ring pipe 44. The second grouting ring pipe 44 has the same structure as the first grouting ring pipe 42. A plurality of second grouting ports 441 are provided on the second grouting ring pipe 44. The first main pipe 122, the second main pipe 132 and the third main pipe 222 are all welded with the second grouting ring pipe 44. The second grouting ring pipe 44 in the first main pipe 122 is taken as an example for explanation as follows: the second grouting ring pipe 44 and the first grouting ring pipe 42 are welded to the inner wall of the first main pipe 122 at intervals, and the second grouting pipeline 43 passes through the first main pipe 122. The pipe 122 is connected to the second grouting ring pipe 44, and the end of the second grouting pipeline 43 is arranged on the deck at the top of the conductor frame foundation. When the first grouting pipeline 41 is used to grout the first grouting space 121, the air in the first grouting space 121 will be discharged through the second grouting ring pipe 44 and the second grouting pipeline 43, thereby ensuring that the grouting material can evenly and densely fill the entire first grouting space 121; in addition, when the first grouting pipeline 41 or the first grouting ring pipe 42 is blocked, the second grouting pipeline 43 and the second grouting ring pipe 44 can be used as a backup grouting system for grouting.

[0060] Furthermore, if Figure 4 As shown, a stiffening ring 5 is provided in the first pouring space 121. In this embodiment, a stiffening ring 5 is welded at the intersection line of the first main pipe 122 and the first branch pipe 123 in the first pouring space 121, and the stiffening ring 5 can strengthen the connection strength between the grouting material and the first connecting portion 12, and can further improve the overall structural strength of the first connecting portion 12; it can be understood that stiffening rings 5 ​​are also welded in the second pouring space 131 and the third pouring space 221, respectively.

[0061] Specifically, Fig. 9 and Fig.10As shown, the sealing plate 3 includes a plate body 31, an upper elbow plate 32, a lower elbow plate 33 and a reinforcing rib 34. The plate body 31 is circular, and the upper elbow plate 32 and the lower elbow plate 33 are respectively welded at the edges of the two end surfaces of the plate body 31; the sealing plate 3 welded at the end of the first main inner cavity 1211 is taken as an example to be explained as follows: the edge of the plate body 31 is welded to the inner wall of the first main pipe 122, and the upper elbow plate 32 and the lower elbow plate 33 are also respectively welded to the inner wall of the first main pipe 122, so as to locally strengthen the connection strength between the plate body 31 and the inner wall of the first main pipe 122, and a raised reinforcing rib 34 is provided on one end surface of the plate body 31, so as to improve the structural strength and bearing capacity of the plate body 31.

[0062] This embodiment also provides a jacket foundation construction method, using the jacket foundation described above, comprising the following steps:

[0063] S1. Weld the support rod group 2 to the first connection parts 12 on the two side legs 1 to form a support structure. Specifically, the staff welds the assembled multiple support rod groups 2 to the first connection parts 12 on both sides in sequence at the processing site, so as to form a support structure between the legs 1.

[0064] S2. Lift the assembled main frame to the designated location, and fix the bottom connection section 11 to the steel pipe piles pre-buried in the seabed. Specifically, the staff transports the assembled main frame to the designated sea area, then uses a crane to lift the main frame into place, and fixes the bottom connection section 11 to the steel pipe piles pre-buried in the seabed.

[0065] S3, pouring grouting material into the first grouting space 121. Specifically, a deck for carrying the wind turbine tower is arranged above the main frame, and a grouting material pumping device is arranged on the deck. The grouting material pumping device is connected to the first grouting space 121 in the first connection part 12 through the first grouting pipeline 41. There are four first grouting pipelines 41, which correspond to the first connection parts 12 on the four legs 1, that is, each first grouting pipeline 41 is used to grout all the first connection parts 12 on the same leg 1; when the main frame is fixed, the staff will grout the first connection part 12 until the first grouting space 121 on all the legs 1 is filled with grouting material; after that, when the grouting material solidifies and forms a certain strength, the foundation construction of the conductor frame is completed.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A jacket foundation, characterized in that: include: A main frame, the main frame comprising at least three legs (1), the at least three legs (1) being arranged around a wind turbine tower, each leg (1) comprising a plurality of connecting sections (11) arranged along a length direction, a first connecting portion (12) being connected between two adjacent connecting sections (11), the connecting section (11) at the top layer being used to connect to the wind turbine tower, and the connecting section (11) at the bottom layer being used to connect to a steel pipe pile fixed to the seabed; A support structure, the support structure being arranged between two adjacent legs (1) along a direction surrounding the wind turbine tower, the support structure comprising a plurality of support rod groups (2) arranged along a height direction, the support rod groups (2) being connected to the first connecting portions (12) of the legs (1) on both sides, the first connecting portion (12) having a first pouring space (121) inside, the first pouring space (121) being filled with grouting material.

2. The jacket foundation according to claim 1, characterized in that: The first connecting portion (12) comprises a first main pipe (122) and a first branch pipe (123); the first branch pipe (123) is arranged on the first main pipe (122); the first main pipe (122) is welded to the connecting section (11); and the first branch pipe (123) is welded to the supporting rod group (2); The first main pipe (122) has a first main inner cavity (1211), and the first branch pipe (123) has a first inner cavity (1212). The first main inner cavity (1211) is connected to the first inner cavity (1212). The first main inner cavity (1211) and the first inner cavity (1212) constitute the first perfusion space (121). Both ends of the first main inner cavity (1211) and the end of the first inner cavity (1212) are provided with sealing plates (3).

3. The jacket foundation according to claim 2, characterized in that: The jacket foundation further comprises a grouting assembly (4), wherein the grouting assembly (4) comprises a first grouting pipeline (41), wherein the first grouting pipeline (41) is connected to the first grouting space (121), and the first grouting pipeline (41) is used for grouting the first grouting space (121).

4. The jacket foundation according to claim 3, characterized in that: The grouting assembly (4) further comprises a first grouting ring pipe (42), the first grouting ring pipe (42) being arranged on the inner wall of the first main pipe (122), a plurality of first grouting ports (421) being provided on the first grouting ring pipe (42), and the first grouting ring pipe (42) being in communication with the first grouting pipeline (41).

5. The jacket foundation according to claim 1, characterized in that: The supporting leg (1) further comprises two second connecting parts (13), the two second connecting parts (13) being respectively arranged on the connecting section (11) at the top layer and the connecting section (11) at the bottom layer, the uppermost supporting rod group (2) being connected to the upper second connecting part (13), and the lowermost supporting rod group (2) being connected to the lower second connecting part (13); The second connecting portion (13) has a second pouring space (131) inside, and the second pouring space (131) is filled with the grouting material.

6. The jacket foundation according to claim 5, characterized in that: The support rod group (2) comprises a third connecting portion (22) and two cross-arranged supporting members (21), and the ends of the supporting members (21) are connected to the first connecting portion (12) or the second connecting portion (13); The two support members (21) are connected via the third connection portion (22); the third connection portion (22) has a third pouring space (221); and the third pouring space (221) is filled with the grouting material.

7. The jacket foundation according to claim 6, characterized in that: Each of the support members (21) comprises two diagonal support rods (211), one end of each of the diagonal support rods (211) is connected to the third connection portion (22), and the other end of each of the diagonal support rods (211) is connected to the first connection portion (12) or the second connection portion (13).

8. The jacket foundation according to claim 7, characterized in that: The third connecting portion (22) comprises a third main pipe (222) and two third branch pipes (223), the two third branch pipes (223) being arranged on the third main pipe (222), the two ends of the third main pipe (222) being respectively welded to the two diagonal braces (211) of one of the supporting members (21), and the two third branch pipes (223) being respectively welded to the two diagonal braces (211) of the other supporting member (21); The third main pipe (222) has a third main inner cavity (2211), and the third branch pipe (223) has a third inner cavity (2212). The third main inner cavity (2211) is connected to the two third inner cavities (2212) respectively. The third main inner cavity (2211) and the two third inner cavities (2212) constitute the third perfusion space (221). Both ends of the third main inner cavity (2211) and the ends of the third inner cavity (2212) are provided with sealing plates (3).

9. The jacket foundation according to claim 1, characterized in that: A stiffening ring (5) is arranged in the first pouring space (121).

10. A method for constructing a jacket foundation, characterized in that: Using the jacket foundation according to any one of claims 1 to 9 comprises the following steps: S1, welding the support rod group (2) to the first connecting parts (12) on the supporting legs (1) on both sides to form a support structure; S2, hoisting the assembled main frame to a designated position, and fixing the bottommost connecting section (11) in the steel pipe pile pre-buried in the seabed; S3. Pouring grouting material into the first pouring space (121).

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