阅读说明：本技术 一种风机基础与塔筒的连接结构及施工方法 (Connecting structure of fan foundation and tower barrel and construction method ) 是由 颜志成 纪延涛 刘倩 霍晓刚 李铭 孙铭艺 赵文明 于 2020-04-24 设计创作，主要内容包括：本发明涉及风力发电技术领域,尤其涉及一种风机基础与塔筒的连接结构及施工方法,包括基础桩、与所述基础桩连接的基础平台、连接装置、塔筒法兰,所述基础桩嵌入所述基础平台进行连接,所述连接装置下端与所述基础平台连接,所述塔筒法兰与所述连接装置上端连接,所述基础平台开设有环形槽、包括被所述环形槽包围的固定体,所述固定体外侧壁开设有限位槽；所述连接装置设置于所述环形槽内,所述连接装置包括与所述固定体适配的支撑体,所述支撑体第一侧设置有与所述限位槽适配的限位体；所述方案解决了连接装置在进行吊装、施工中容易出现的移位问题,达到了提升施工质量、施工效率及增强结构强度的技术效果。(The invention relates to the technical field of wind power generation, in particular to a connecting structure of a fan foundation and a tower drum and a construction method, and the connecting structure comprises a foundation pile, a foundation platform connected with the foundation pile, a connecting device and a tower drum flange, wherein the foundation pile is embedded into the foundation platform for connection, the lower end of the connecting device is connected with the foundation platform, the tower drum flange is connected with the upper end of the connecting device, the foundation platform is provided with an annular groove and comprises a fixing body surrounded by the annular groove, and the outer side wall of the fixing body is provided with a limiting groove; the connecting device is arranged in the annular groove and comprises a supporting body matched with the fixing body, and a limiting body matched with the limiting groove is arranged on the first side of the supporting body; the technical scheme solves the displacement problem of the connecting device which is easy to appear in hoisting and construction, and achieves the technical effects of improving construction quality, construction efficiency and enhancing structural strength.)

1. The utility model provides a connection structure of fan basis and tower section of thick bamboo which characterized in that: the pile foundation structure comprises a foundation pile (1), a foundation platform (2) connected with the foundation pile (1), a connecting device and a tower drum flange (4), wherein the foundation pile (1) is embedded into the foundation platform (2) for connection, the lower end of the connecting device is connected with the foundation platform (2), the tower drum flange (4) is connected with the upper end of the connecting device, the foundation platform (2) is provided with an annular groove (21) and comprises a fixed body (22) surrounded by the annular groove (21), and the outer side wall of the fixed body (22) is provided with a limiting groove (221); the connecting device is arranged in the annular groove (21), the connecting device comprises a supporting body (31) matched with the fixing body (22), and a limiting body (32) matched with the limiting groove (221) is arranged on the first side of the supporting body (31).

2. The wind turbine foundation and tower connection structure of claim 1, wherein: the limiting groove (221) is provided with a first magnetic part (2211), and the limiting body (32) is provided with a second magnetic part (321) matched with the first magnetic part (2211).

3. The wind turbine foundation and tower connection structure of claim 2, wherein: first connecting hole (211) have been seted up to ring channel (21) bottom side, connecting device still include with connector (33) and the connecting piece that supporter (31) second side is connected, connector (33) seted up along vertical setting and with second connecting hole (331) of first connecting hole (211) adaptation, tower section of thick bamboo flange (4) seted up with third connecting hole (41) of second connecting hole (331) adaptation, the connecting piece will tower section of thick bamboo flange (4), connector (33), basic platform (2) are connected through inserting third connecting hole (41), second connecting hole (331), first connecting hole (211).

4. The wind turbine foundation and tower connection structure of claim 3, wherein: the connecting piece comprises a first connecting piece (341), and the first connecting piece (341) is inserted into the third connecting hole (41), the second connecting hole (331) and the first connecting hole (211) in sequence to be connected.

5. The connection structure of a wind turbine foundation and a tower drum as claimed in claim 4, wherein: the connector (33) set up to a plurality ofly and follow the interval of supporter (31) second side sets up, grout blanket (8) have been pour between a plurality of connectors.

6. The wind turbine foundation and tower connection structure of claim 5, wherein: the plurality of connecting bodies (33) are arranged concentrically and circumferentially.

7. The wind turbine foundation and tower connection structure of claim 6, wherein: the supporting body (31) is provided with grouting holes (311) communicated with the first side and the second side of the supporting body, and the grouting holes (311) are arranged among the connecting bodies (33).

8. The connection structure of a wind turbine foundation and a tower drum as claimed in any one of claims 1 to 7, wherein: the wind power generation device is characterized in that a connecting portion (5) is arranged on the upper portion of the tower drum flange (4), a tower drum (6) is connected to the upper end of the connecting portion (5), the connecting structure of the fan foundation and the tower drum further comprises a supporting rod (7), one end of the supporting rod (7) is connected with the tower drum (6), and the other end of the supporting rod is connected with the upper portion of the foundation platform (2).

9. The wind turbine foundation and tower connection structure of claim 8, wherein: the supporting rods (7) are distributed in an axisymmetrical mode by taking the tower barrel (6) as a center.

10. A construction method of a connection structure of a fan foundation and a tower barrel is characterized by comprising the following steps:

pile sinking, namely vertically embedding a foundation pile (1) into a seabed rock-soil layer by a pile driver in a specified area to set depth;

a pile head processing step, wherein the pile head of each foundation pile (1) is cut flat, so that the pile top of each foundation pile (1) is at the same horizontal height;

a step of installing a foundation platform (2), wherein the foundation platform (2) is prefabricated in a factory, and the foundation platform (2) is connected with the foundation pile (1) through hoisting;

a connecting device mounting step, namely hoisting a limiting body (32) of the connecting device into the annular groove (21) along the limiting groove (221);

grouting: performing concrete grouting between the connecting bodies (33), wherein the upper surface of the grouting layer (8) is lower than the upper surface of the connecting bodies (33);

a flange mounting step: and hoisting the tower drum flange (4) to the upper part of the connecting device, aligning the third connecting hole (41), the second connecting hole (331) and the first connecting hole (211), and sequentially passing through the third connecting hole (41), the second connecting hole (331) and the first connecting hole (211) through the first connecting piece (341) for connection.

The technical field is as follows:

the invention relates to the technical field of wind power generation, in particular to a connecting structure of a fan foundation and a tower drum and a construction method.

Background art:

wind power generation is the fastest-developing green energy technology in the world, and people have noticed some limitations on land wind energy utilization, such as large occupied area, noise pollution and the like, while land wind power plant construction is rapidly developed. Due to the abundant wind energy resources at sea and the feasibility of the current technology, the sea becomes a rapidly-developing wind power market.

The installation of fan divide into basis installation part and tower section of thick bamboo installation part usually, will by connecting device two parts are connected, and connecting device's installation needs the hoist and mount, and when marine operation, receives the influence that ocean current and sea wind can, connecting device hoist and mount can have after basic platform to rock, the phenomenon of aversion, lead to still needing the secondary positioning when connecting, has reduced the efficiency of construction, has increased the inconvenience of construction.

The invention is provided in view of the above.

The invention content is as follows:

the invention provides a connecting structure of a fan foundation and a tower drum and a construction method, which can accurately position when a connecting device is hoisted, do not need secondary adjustment, and have the effects of simple and convenient construction and high connecting strength.

The invention provides a connecting structure of a fan foundation and a tower drum, which comprises a foundation pile, a foundation platform connected with the foundation pile, a connecting device and a tower drum flange, wherein the foundation pile is embedded into the foundation platform for connection; the connecting device is arranged in the annular groove and comprises a supporting body matched with the fixing body, and a limiting body matched with the limiting groove is arranged on the first side of the supporting body.

By adopting the scheme, the foundation piles can be driven into the seabed by a pile driver, pile socket holes with the same number as the foundation piles are formed in the bottom surface of the foundation platform, the outer diameter of each pile socket hole is larger than that of the foundation pile, a grouting hole penetrating through the top surface of the foundation platform is formed in the top of each pile socket hole, and the foundation platform is connected with the foundation piles by grouting through a grouting channel; the annular groove is arranged in the center of the base platform, the depth of the annular groove is smaller than the height of the base platform, and the fixing body and the base platform are integrally formed; the connecting device comprises a supporting body matched with the fixing body, namely the supporting body is arranged on the periphery of the fixing body, the outer diameter of the supporting body is slightly larger than that of the fixing body, and the limiting body can be meshed with the limiting groove in a connecting mode, so that the connecting device is limited.

Furthermore, the limiting groove is provided with a first magnetic part, and the limiting body is provided with a second magnetic part matched with the first magnetic part.

By adopting the scheme, the first magnetic part can be arranged on the front and/or the side of the limiting groove, and the second magnetic part is correspondingly arranged on the front and/or the side of the limiting body. The first magnetic suction part and the second magnetic suction part are arranged to enable the connecting device to be placed after being hoisted more stably and more accurately in positioning, so that the follow-up installation efficiency is improved.

Furthermore, a first connecting hole is formed in the bottom side of the annular groove, the connecting device further comprises a connecting body and a connecting piece, the connecting body is connected with the second side of the supporting body, a second connecting hole which is longitudinally arranged and is matched with the first connecting hole is formed in the connecting body, a third connecting hole which is matched with the second connecting hole is formed in the tower drum flange, and the connecting piece connects the tower drum flange, the connecting body and the base platform by inserting the third connecting hole, the second connecting hole and the first connecting hole.

By adopting the scheme, the first connecting hole is formed downwards from the bottom side of the annular groove and does not penetrate through the bottom surface of the base platform; the second connecting hole can be selected to be vertically arranged along the connecting body and penetrate through the upper surface and the lower surface of the connecting body, the positions and the sizes of the three connecting holes, the second connecting hole and the first connecting hole are corresponding to each other in the adaptive mode, and the insertion of the connecting piece can be met. The scheme makes the construction more convenient when basic platform, connecting device, tower section of thick bamboo flange joint, firm moreover.

Preferably, the connecting piece comprises a first connecting piece, and the first connecting piece is inserted into the third connecting hole, the second connecting hole and the first connecting hole in sequence for connection.

By adopting the scheme, the third connecting hole, the second connecting hole and the first connecting hole can be internally provided with the internal thread, and the first connecting piece can be a screw rod with an external thread and is screwed and connected from top to bottom. The scheme is convenient and efficient in construction, and the connection strength of the structure can be guaranteed.

Preferably, the connectors are arranged in a plurality of numbers and arranged along the second side of the support body at intervals, and grouting layers are poured among the connectors.

By adopting the scheme, the first connecting piece is used for constructing the grouting layer before connecting the third connecting hole, the second connecting hole and the first connecting hole, and the grouting layer can be poured to enable the connecting device to be more tightly and firmly connected with the foundation platform. The figure only shows the structure of a grouting layer, and the grouting layer is required to be poured at intervals among all connecting bodies during actual construction.

Preferably, the plurality of connectors are arranged in concentric circles.

By adopting the scheme, the supporting bodies are concentrically arranged in a circle, so that the connecting device is more convenient to prefabricate, and the intervals between the supporting bodies are equal, so that the field construction process is more convenient, and the construction efficiency is improved to some extent.

Preferably, the supporting body is provided with grouting holes communicated with the first side and the second side of the supporting body, and the grouting holes are arranged among the plurality of connecting bodies.

By adopting the scheme, the arrangement of the grouting holes can enable the concrete in the grouting layer to flow into the gap between the supporting body and the fixing body.

Specifically, tower section of thick bamboo flange upper portion is provided with connecting portion, the connecting portion upper end is connected with a tower section of thick bamboo, the connection structure of fan basis and a tower section of thick bamboo still includes the bracing piece, bracing piece one end with a tower section of thick bamboo is connected, the other end with basic platform upper portion is connected.

By adopting the scheme, the connecting part and the tower drum flange can be integrally formed during prefabrication, the connecting part and the tower drum can be connected in modes such as welding, and the supporting rod can enhance the bending resistance of the tower drum.

Preferably, the support rods are axially symmetrically distributed by taking the tower barrel as a center.

By adopting the scheme, the fan foundation and tower cylinder connecting structure can be stressed more uniformly under the action of external force, so that the structural stability is improved.

Preferably, the included angle between the supporting rod and the upper side of the base platform is set between 35 degrees and 60 degrees.

By adopting the scheme, the bending resistance of the whole structure can be strongest when the included angle is set between 35 degrees and 60 degrees, so that the safety of the structure is ensured.

Preferably, the connecting piece includes a second connecting piece and a third connecting piece, the first connecting hole and the second connecting hole are distributed in three concentric circles, the middle hole and the other side holes are distributed in the middle, the second connecting piece sequentially penetrates through the side holes of the first connecting hole and the second connecting hole to connect the connecting device with the foundation platform, then a grouting layer is poured to enable the upper surface of the grouting layer to be lower than the second connecting hole, the third connecting hole is distributed in three concentric circles, the third connecting piece penetrates through the middle hole of the third connecting hole to be connected with the middle hole of the second connecting hole, and the side edge of the third connecting hole is a space for accommodating the top end of the second connecting piece.

The invention also discloses a construction method of the connection structure of the fan foundation and the tower drum, which comprises the following steps:

pile sinking, namely vertically embedding a foundation pile into a seabed rock-soil layer by a pile driver in a specified area to set depth;

a pile head processing step, namely cutting the pile head of each foundation pile flat to ensure that the pile top of each foundation pile is at the same horizontal height;

a step of installing a foundation platform, wherein the foundation platform is prefabricated in a factory and is connected with the foundation pile through hoisting;

a connecting device mounting step, namely hoisting a limiting body of the connecting device into the annular groove along the limiting groove;

grouting, namely performing concrete grouting among the connectors, wherein the upper surface of the grouting layer is lower than the upper surfaces of the connectors;

and mounting a flange, namely hoisting the tower drum flange to the position above the connecting device, aligning the third connecting hole, the second connecting hole and the first connecting hole, and sequentially passing through the third connecting hole, the second connecting hole and the first connecting hole through a first connecting piece for connection.

The invention has the beneficial effects that:

1. the limiting groove, the limiting body and the supporting body are arranged, so that the problem of displacement of the connecting device which is easy to occur in hoisting and construction is solved, and the technical effects of improving construction quality, construction efficiency and enhancing structural strength are achieved.

2. The setting of first magnetism portion of inhaling, second magnetism portion of inhaling has further solved connecting device shifts, the rocking problem that appears easily in the construction has reached the technological effect who promotes construction quality, efficiency of construction and reinforcing structural strength.

3. The connecting piece, the third connecting hole, the second connecting hole and the first connecting hole are arranged, the technical problem that the tower drum flange, the connecting device and the base platform are not firmly connected is solved, and the technical effect of enhancing the overall strength of the structure is achieved.

4. The technical problem that the connection device is not firmly connected with the foundation platform is further solved by the arrangement of the grouting layer, and the technical effect of enhancing the overall strength of the structure is achieved.

5. The technical problem of insecure connection between the supporting body and the fixing body due to the gap is solved by the arrangement of the grouting hole, and the technical effect of enhancing the overall strength of the structure is achieved.

6. The supporting rod solves the technical problem that the tower cylinder is low in bending resistance, and the technical effect of improving the bending resistance of the structure is achieved.

Description of the drawings:

in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a first embodiment of the annular groove of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a schematic view of a first embodiment of a connection device according to the present invention;

FIG. 4 is a schematic view of the connection device and the fixing body according to the first embodiment of the present invention;

FIG. 5 is a schematic view of a tower flange according to a first embodiment of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 5;

FIG. 7 is a left side view of the first embodiment of the present invention;

FIG. 8 is a schematic view of a second embodiment of a connecting device and a fixing body of the present invention;

FIG. 9 is a tower flange according to a second embodiment of the present invention.

Description of reference numerals:

the technical scheme of the invention can be more clearly understood and explained by combining the embodiment of the invention through the reference sign description.

1-foundation pile, 2-foundation platform, 21-annular groove, 211-first connecting hole, 22-fixing body, 221-limiting groove, 2211-first magnetic part, 31-supporting body, 311-grouting hole, 32-limiting body, 321-second magnetic part, 33-connecting body, 331-second connecting hole, 341-first connecting piece, 342-second connecting piece, 343-third connecting piece, 4-tower flange, 41-third connecting hole, 5-connecting part, 6-tower, 7-supporting rod and 8-grouting layer.

The specific implementation mode is as follows:

reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

The present invention will be described in detail below by way of embodiments.

Embodiment mode 1

Referring to fig. 1, 2, 3, and 4, a connection structure of a wind turbine foundation and a tower drum includes a foundation pile 1, a foundation platform 2 connected to the foundation pile 1, a connection device, and a tower drum flange 4, where the foundation pile 1 is embedded in the foundation platform 2 for connection, the lower end of the connection device is connected to the foundation platform 2, the tower drum flange 4 is connected to the upper end of the connection device, the foundation platform 2 is provided with an annular groove 21 and includes a fixing body 22 surrounded by the annular groove 21, and the outer side wall of the fixing body 22 is provided with a limit groove 221; the connecting device is arranged in the annular groove 21 and comprises a supporting body 31 matched with the fixing body 22, and a limiting body 32 matched with the limiting groove 221 is arranged on the first side of the supporting body 31.

By adopting the scheme, the foundation piles 1 can be driven into the seabed by a pile driver, pile socket holes with the same number as the foundation piles 1 are formed in the bottom surface of the foundation platform 2, the outer diameter of each pile socket hole is larger than that of the foundation pile 1, a grouting hole penetrating through the top surface of the foundation platform 2 is formed in the top of each pile socket hole, and the foundation platform 2 is connected with the foundation piles 1 by grouting through grouting channels; the base platform 2 is cylindrical, the annular groove 21 is arranged at the center of the base platform 2, the depth is smaller than the height of the base platform 2, and the fixing body 22 and the base platform 2 are integrally formed; the limiting groove 221 is groove-shaped, the limiting body 32 is convex, the connecting device comprises a supporting body 31 matched with the fixing body 22, namely the supporting body 31 is arranged on the periphery of the fixing body 22, the outer diameter of the supporting body is slightly larger than that of the fixing body 22, and the limiting body 32 can be meshed with the limiting groove 221 to be connected, so that the connecting device is limited.

Through annular groove 21, fixed body 22, supporter 31, spacing groove 221, spacing body 31's cooperation sets up, can make connecting device accurate location in the middle of the process of hoist and mount, need not the secondary adjustment, also can not shift, the phenomenon of rocking because environmental factor produces, improved efficiency of construction and structural strength.

Referring to fig. 2 and 3, the limit groove 221 is provided with a first magnetic portion 2211, and the limit body 32 is provided with a second magnetic portion 321 adapted to the first magnetic portion 2211.

With the above scheme, the first magnetic part 2211 and the second magnetic part 321 may be made of magnets into magnetic sheet, and are fixed to the position-limiting groove 221 and the position-limiting body 31 by means of bolt connection, pin connection, and the like; the first magnetic attraction portion 2211 may be disposed on the front and/or the side of the position-limiting groove 221, and the second magnetic attraction portion 321 is correspondingly disposed on the front and/or the side of the position-limiting body 31. The arrangement of the first magnetic attraction part 2211 and the second magnetic attraction part 321 can enable the connecting device to be placed after being hoisted more stably and more accurately in positioning, so that the follow-up installation efficiency is improved.

Referring to fig. 2, 3, 5, and 6, a first connection hole 211 is formed in a bottom side of the annular groove 21, the connection device further includes a connection body 33 and a connection member, the connection body 33 is connected to a second side of the support body 31, the connection body 33 is formed with a second connection hole 331 longitudinally arranged and adapted to the first connection hole 211, the tower flange 4 is formed with a third connection hole 41 adapted to the second connection hole 331, and the connection member connects the tower flange 4, the connection body 33, and the base platform 2 by being inserted into the third connection hole 41, the second connection hole 331, and the first connection hole 211.

By adopting the scheme, the first connecting hole 211 is formed downwards from the bottom side of the annular groove 21 and does not penetrate through the bottom surface of the base platform 2, so that the connecting piece can be prevented from being corroded by seawater; the second connection hole 331 can be vertically arranged along the connection body and penetrate through the upper surface and the lower surface of the connection body 33, and the adaptation means that the positions and the sizes of the third connection hole 41, the second connection hole 331 and the first connection hole 211 are corresponding to each other, so that the insertion of the connection piece can be met. The scheme ensures that the construction is more convenient and firm when the foundation platform 2, the connecting device and the tower drum flange 4 are connected.

Referring to fig. 5 and 6, the connector includes a first connector 341, and the first connector 341 is inserted into the third connection hole 41, the second connection hole 331, and the first connection hole 211 in sequence for connection.

By adopting the above scheme, the third connecting hole 41, the second connecting hole 331 and the first connecting hole 211 can be respectively configured as three concentric circles with different radiuses and distributed on the tower flange 4, the connecting body 33 and the bottom side of the annular groove 21, internal threads can be arranged in the third connecting hole 41, the second connecting hole 331 and the first connecting hole 211, and the first connecting member 341 can be a screw rod with external threads and is screwed and connected from top to bottom. The scheme is convenient and efficient in construction, and the connection strength of the structure can be guaranteed.

Referring to fig. 4, the connecting bodies 33 are disposed in a plurality and spaced apart from each other along the second side of the supporting body 31, and a grouting layer 8 is poured between the connecting bodies 33.

By adopting the scheme, the arrangement form of the connecting bodies 33 is provided, the connecting bodies 33 are arranged in a plurality and are arranged at intervals along the second side of the supporting body 31, so that the weight of the connecting device during prefabrication can be reduced, and the transportation is more convenient; before the first connecting piece 341 connects the third connecting hole 41, the second connecting hole 331 and the first connecting hole 211, the grouting layer 8 is constructed, at this time, the second connecting hole 331 and the first connecting hole 211 can be respectively covered by a cover plate, so as to prevent concrete from being blocked, and the grouting layer 8 can be poured to enable the connecting device to be more tightly and firmly connected with the foundation platform 2. The figure shows only one grouting layer 8, and the grouting layer 8 is formed by pouring the interval between each connecting body 33 in actual construction.

Referring to fig. 4, the plurality of connection bodies 33 are arranged concentrically and circumferentially.

By adopting the scheme, the supporting bodies 31 are arranged concentrically and circumferentially, so that the connecting device is more convenient to prefabricate, and the intervals among the supporting bodies 31 are equal, so that the field construction process is more convenient, and the construction efficiency is improved to some extent.

Referring to fig. 4, the supporting body 31 is provided with a grouting hole 311 communicating the first side and the second side of the supporting body, and the grouting hole 311 is disposed between the plurality of connecting bodies 33.

By adopting the above scheme, the setting of grout hole 311 can make concrete in grout blanket 8 flows into in the clearance between supporter 31 and the fixed body 22, because when actual construction to the clearance is difficult to go to carry out the concrete with the machine and pours into, adopts artifical mode again consuming time and difficultly, so through with concrete in grout blanket 8 is introduced in the clearance can enough strengthen connecting device with be connected between the fixed body 22, can use manpower sparingly again and conveniently construct to structural strength and work efficiency have been promoted.

Referring to fig. 5, 6 and 7, a connecting portion 5 is arranged on the upper portion of the tower flange 4, a tower 6 is connected to the upper end of the connecting portion 5, the connection structure of the wind turbine foundation and the tower further comprises a supporting rod 7, one end of the supporting rod 7 is connected with the tower 6, and the other end of the supporting rod is connected with the upper portion of the foundation platform 2.

Adopt above-mentioned scheme, connecting portion 5 and tower section of thick bamboo flange 4 integrated into one piece when prefabricating, connecting portion 5 with tower section of thick bamboo 6 can adopt modes such as welding to be connected, bracing piece 7 can strengthen tower section of thick bamboo 6's bending resistance, because marine sometimes sea wind is great, bracing piece 7 can promote structure bulk strength.

Referring to fig. 7, the support rods 7 are axially symmetrically distributed around the tower tube 6.

By adopting the scheme, the fan foundation and tower cylinder connecting structure can be stressed more uniformly under the action of external force, so that the structural stability is improved.

The included angle between the support rod 7 and the upper side of the base platform 2 is set between 35 degrees and 60 degrees.

By adopting the scheme, the bending resistance of the whole structure can be strongest when the included angle is set between 35 degrees and 60 degrees, so that the safety of the structure is ensured.

The invention also discloses a construction method of the connection structure of the fan foundation and the tower drum, which comprises the following steps:

pile sinking, namely vertically embedding a foundation pile 1 into a seabed rock-soil layer by a pile driver in a specified area to set depth;

a pile head processing step, namely cutting the pile head of each foundation pile 1 flat to ensure that the pile top of each foundation pile 1 is at the same horizontal height;

a step of installing a foundation platform 2, wherein the foundation platform 2 is prefabricated in a factory, and the foundation platform 2 is connected with the foundation pile 1 through hoisting;

a connecting device mounting step, namely, hoisting a limiting body 32 of the connecting device into the annular groove 21 along the limiting groove 221;

and a grouting step, namely performing concrete grouting between the connecting bodies 33, wherein the upper surface of the grouting layer 8 is lower than the upper surface of the connecting bodies 33.

And a flange mounting step, namely hoisting the tower drum flange 4 to the upper part of the connecting device, aligning the third connecting hole 41, the second connecting hole 331 and the first connecting hole 211, and sequentially connecting the third connecting hole 41, the second connecting hole 331 and the first connecting hole 211 through the first connecting piece 341.

Embodiment mode 2

Referring to fig. 8 and 9, the present embodiment has substantially the same structure as embodiment 1, except that: the connecting pieces comprise a second connecting piece 342 and a third connecting piece 343, the first connecting hole 211 and the second connecting hole 331 are both arranged in three concentric circles, wherein the middle holes are distributed in the middle, and the rest holes are side holes, the second connecting piece 342 sequentially penetrates through the side holes of the first connecting hole 211 and the second connecting hole 331 to connect the connecting device with the foundation platform 2, then the grouting layer 8 is poured to enable the upper surface of the grouting layer 8 to be lower than the second connecting hole 331, at the moment, the third connecting holes 41 are also arranged in three concentric circles, the third connecting piece 343 penetrates through the middle hole of the third connecting hole 41 to be connected with the middle hole of the second connecting hole 331, and the side edge of the third connecting hole 41 is a space for accommodating the top end of the second connecting piece 342. The scheme can fix the connecting device before grouting, so that the position of the connecting device is prevented from moving due to grouting in the grouting process.

In some embodiments of the present invention, the connection body 33 may be prefabricated in a ring shape at the factory and directly hoisted.

It should be noted that the foundation pile 1 may be in the form of not only the above-described high-rise cap foundation but also a mono-pile cap foundation. In addition, the foundation cap 2 and the foundation pile 1 may also be replaced by a foundation form of a jacket, the jacket includes a plurality of brackets and a jacket platform connected with the tops of the brackets, the fixing body 22 may be made of steel, the annular groove 221 is formed in the jacket platform, and the connecting device is arranged in the annular groove 221 and connected with the tower flange 4.

It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the protection scope of the claims of the present invention.