CN110965568A

CN110965568A - Fan system, composite foundation and construction method thereof

Info

Publication number: CN110965568A
Application number: CN201811163294.4A
Authority: CN
Inventors: 范少涛; 王洪庆; 张力; 孙熊雄; 马兆荣; 何小华
Original assignee: China Energy Engineering Group Guangdong Electric Power Design Institute Co Ltd
Current assignee: China Energy Engineering Group Guangdong Electric Power Design Institute Co Ltd
Priority date: 2018-09-30
Filing date: 2018-09-30
Publication date: 2020-04-07

Abstract

The invention relates to a fan system, a composite foundation and a construction method thereof. The suction bucket includes bearing wall and the lateral wall that is connected with the bearing wall, and the bearing wall encloses into the bucket chamber with the lateral wall. The pile body is arranged on the bearing wall and is positioned on one side of the bearing wall back to the side wall. At least two reinforcing plates are vertically arranged on the bearing wall, the at least two reinforcing plates are distributed at intervals around the peripheral wall of the pile body, and the at least two reinforcing plates are connected with the pile body. The reinforcing plates are arranged on the peripheral wall of the pile body, are positioned between two adjacent reinforcing plates and are connected with the reinforcing plates positioned on the two sides of the reinforcing plates. The fan system, the composite foundation and the construction method thereof have the characteristic of high connection stability of the pile body and the suction bucket.

Description

Fan system, composite foundation and construction method thereof

Technical Field

The invention relates to the technical field of offshore wind power engineering, in particular to a wind turbine system, a composite foundation and a construction method of the composite foundation.

Background

The wind energy is a clean renewable green energy source and has the characteristics of high development efficiency, good economy and the like. The power generation by utilizing wind energy has good commercial prospect, and with the arrival of new period of offshore wind power plant construction in China, the development of offshore wind power business is stably promoted from extensive rapid growth to deep ploughing and fine culture. The wind turbine system is an important component part in an offshore wind farm, and can comprise a composite foundation and a wind turbine arranged on the composite foundation. The composite foundation may include a suction bucket and a pile body disposed on the suction bucket, and in the conventional art, the pile body and the suction bucket have poor connection stability.

Disclosure of Invention

In view of the above, it is necessary to provide a wind turbine system, a composite foundation and a construction method thereof, aiming at improving the connection stability between a pile body and a suction bucket.

A composite foundation, comprising:

the suction barrel comprises a bearing wall and a side wall connected with the bearing wall, and a barrel cavity is defined by the bearing wall and the side wall;

the pile body is arranged on the bearing wall and is positioned on one side of the bearing wall, which is back to the side wall;

the reinforcing plates are vertically arranged on the bearing wall, are distributed at intervals around the peripheral wall of the pile body, and are connected with the pile body; and

and the reinforcing plate is arranged on the peripheral wall of the pile body, is positioned between two adjacent reinforcing plates and is connected with the reinforcing plates positioned on the two sides of the reinforcing plates.

The composite foundation has at least the following advantages:

the suction bucket comprises a bearing wall and a side wall, a bucket cavity is defined by the bearing wall and the side wall, the pile body is arranged on the bearing wall, when the composite foundation sinks to the position near the mud surface, water in the bucket cavity can be drawn out, so that negative pressure is formed in the bucket cavity, under the action of the negative pressure, the side wall is inserted into the mud surface, and the composite foundation sinks to a preset elevation. The reinforcing plate is vertically arranged on the bearing wall and connected with the pile body, so that the pile body can be prevented from being inclined relative to the suction barrel, and the connection stability of the pile body and the suction barrel is improved. The quantity of reinforcing plate is at least two, and at least two reinforcing plate surround the perisporium interval distribution of pile body to from at least two direction reinforcing anti-skew effects, thereby further improve the stability of being connected of pile body and suction bucket. The reinforcing plate is arranged between two adjacent reinforcing plates and is connected with the reinforcing plates arranged on two sides of the reinforcing plates, so that the adjacent reinforcing plates can be prevented from deforming close to or away from each other by the existence of the reinforcing plates, the integral stability of at least two reinforcing plates is enhanced, the anti-deflection effect of at least two reinforcing plates can be better ensured to be enhanced from at least two directions, and the connection stability of the pile body and the suction bucket is further improved. The reinforcing plate is arranged on the peripheral wall of the pile body, so the reinforcing plate can also play a role in enhancing the connection firmness of the pile body and the reinforcing plate, the effect that the reinforcing plate can prevent the inclined pile body from being inclined is ensured, and the connection stability of the pile body and the suction barrel is further improved.

The technical solution is further explained below:

in one embodiment, the reinforcing plate has an arc-shaped surface, and the arc-shaped surface is concave to the pile body.

In one embodiment, the reinforcing plate is provided with a mud containing hole, and the mud containing hole penetrates through the reinforcing plate.

In one embodiment, the composite foundation further comprises a first reinforcing rib, the first reinforcing rib is arranged on the bearing wall, and two ends of the first reinforcing rib are respectively connected with two adjacent reinforcing plates.

In one embodiment, the number of the first reinforcing ribs between two adjacent reinforcing plates in at least one group is at least two, and the first reinforcing ribs between two adjacent reinforcing plates are arranged at intervals.

In one embodiment, the composite foundation further comprises a water pipe and a water pump, the pile body is provided with a hollow cavity, one end of the water pipe is communicated with the barrel cavity, one end of the water pipe is located in the hollow cavity, and the other end of the water pipe is communicated with the water pump.

In one embodiment, the number of the water pipes is at least two, and one end of at least two water pipes communicated with the barrel cavity is arranged at intervals.

In one embodiment, the composite foundation further comprises a cable tube, the pile body is further provided with a through hole communicated with the hollow cavity, and the cable tube is arranged in the through hole in a penetrating mode.

A fan system, comprising:

a composite foundation as described above; and

and the fan is arranged on the pile body and is far away from the suction barrel.

The fan system at least has the following advantages:

because the fan system includes fan and above-mentioned compound basis, so the fan system possesses the technological effect of above-mentioned compound basis, can improve the stability of being connected of pile body and suction bucket to guarantee the holistic structural stability of fan system, prevent that fan system from taking place incident such as collapsing.

A construction method of a composite foundation comprises the following steps:

providing a composite foundation as described above;

hoisting the composite foundation into water; and

and pumping out water in the barrel cavity to form negative pressure in the barrel cavity, and sinking the composite foundation to a preset elevation under the action of the negative pressure.

The construction method of the composite foundation at least has the following advantages:

the construction method of the composite foundation adopts the composite foundation, so that the composite foundation constructed by the method has the characteristic of improving the connection stability of the pile body and the suction bucket.

Drawings

FIG. 1 is a front view of a composite foundation according to one embodiment;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic flow chart of a construction method of the composite foundation in an embodiment.

Description of reference numerals:

100. the composite foundation comprises a composite foundation body 110, a suction bucket 111, a bearing wall 112, a side wall 120, a pile body 130, a reinforcing plate 131, a mud containing hole 140, a reinforcing plate 141, an arc-shaped surface 150, a first reinforcing rib 160, a second reinforcing rib 170, a water pipe 180, a cable pipe 191, a bearing platform 192 and a climbing ladder.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The reference to "perpendicular" herein is not limited to absolute perpendicular only, and should allow for some error.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

Referring to fig. 1 and 2, in one embodiment, the composite foundation 100 may be used as a load bearing member of a wind turbine for transferring the load of the wind turbine to a foundation. Specifically, the composite foundation 100 includes a suction bucket 110, a pile 120, a reinforcing plate 130 and a reinforcing plate 140, wherein the pile 120 is disposed on the suction bucket 110, and the reinforcing plate 130 and the reinforcing plate 140 cooperate to improve the connection stability between the pile 120 and the suction bucket 110.

Referring to fig. 2, the suction bucket 110 includes a bearing wall 111 and a sidewall 112 connected to the bearing wall 111, and the bearing wall 111 and the sidewall 112 form a bucket cavity. The pile 120 is disposed on the bearing wall 111, and the pile 120 is located on a side of the bearing wall 111 opposite to the side wall 112. The number of the reinforcing plates 130 is at least two, the at least two reinforcing plates 130 are vertically arranged on the bearing wall 111, the at least two reinforcing plates 130 are distributed at intervals around the peripheral wall of the pile body 120, and the at least two reinforcing plates 130 are connected with the pile body 120. The reinforcing plate 140 is disposed on the peripheral wall of the pile body 120, the reinforcing plate 140 is located between two adjacent reinforcing plates 130, and the reinforcing plate 140 is connected to the reinforcing plates 130 located on both sides of the reinforcing plate 140.

Because the bearing wall 111 and the side wall 112 enclose a barrel cavity, when the composite foundation 100 sinks to the vicinity of the mud surface, water in the barrel cavity can be pumped out, so that negative pressure is formed in the barrel cavity, and under the action of the negative pressure, the side wall 112 is inserted into the mud surface, so that the composite foundation 100 sinks to a preset elevation. It should be noted that the air in the barrel chamber can be simultaneously pumped out while the water in the barrel chamber is pumped out. The reinforcing plate 130 is erected on the bearing wall 111 and connected to the pile body 120, so that the pile body 120 can be prevented from being inclined with respect to the suction bucket 110, and the connection stability between the pile body 120 and the suction bucket 110 can be improved. The number of the reinforcing plates 130 is at least two, and the at least two reinforcing plates 130 are distributed around the circumferential wall of the pile body 120 at intervals to enhance the anti-deflection effect from at least two directions, so as to further improve the connection stability of the pile body 120 and the suction bucket 110. The reinforcing plate 140 is located between two adjacent reinforcing plates 130, and the reinforcing plate 140 is connected to the reinforcing plates 130 located on both sides of the reinforcing plate 140, so that the presence of the reinforcing plate 140 can prevent the two adjacent reinforcing plates 130 from deforming to approach or separate from each other, and enhance the overall stability of the at least two reinforcing plates 130, so as to better ensure that the at least two reinforcing plates 130 can enhance the anti-deflection effect from at least two directions, thereby further improving the connection stability of the pile body 120 and the suction bucket 110. The reinforcing plate 140 is disposed on the peripheral wall of the pile 120, so that the reinforcing plate 140 can also enhance the connection between the pile 120 and the reinforcing plate 140, and ensure that the reinforcing plate 140 can prevent the pile 120 from being inclined, thereby further improving the connection stability between the pile 120 and the suction bucket 110.

Referring to fig. 1, the suction bucket 110 may serve to support the pile 120, and may also serve to facilitate the formation of negative pressure, so that the composite foundation 100 may sink to a predetermined height under the action of the negative pressure. In the present embodiment, the suction bucket 110 has a cylindrical shape with an open bottom. The suction bucket 110 is made of steel. Of course, in other embodiments, the shape of the suction bucket 110 may be flexibly configured. The material of the suction bucket 110 can also be flexibly adjusted.

The pilings 120 provide a location for the wind turbine and the pilings 120 are of a height such that the wind turbine can be exposed to the sea surface. The pile body 120 may be fixedly connected to the suction bucket 110 by welding or the like. In this embodiment, the pile body 120 is a single pile, and the whole pile body 120 is substantially in a circular truncated cone shape, and the outer diameter of the pile body 120 is increased along the direction close to the suction bucket 110, so that the stability is good. The pile body 120 is of a non-grouting transition section structure to save materials. Of course, in other embodiments, the pile body 120 may be multi-pile.

Furthermore, a mud containing hole 131 is formed in the reinforcing plate 130, and the mud containing hole 131 penetrates through the reinforcing plate 130. When the bearing wall 111 sinks to the mud surface, the mud can be filled into the mud containing hole 131, and the mud connects the at least two reinforcing plates 130 into a whole, so as to enhance the overall stability of the at least two reinforcing plates 130. The presence of the mud-containing holes 131 can also reduce the amount of material used to reduce cost. In the present embodiment, the reinforcing plate 130 is a substantially triangular plate, which has a strong stability. The reinforcing plate 130 and the pile body 120 and the reinforcing plate 130 and the suction bucket 110 can be fixedly connected by welding or the like. The number of the reinforcing plates 130 is plural.

Referring to fig. 2 again, further, the reinforcing plate 140 has an arc-shaped surface 141, and the arc-shaped surface 141 is concave toward the pile 120. Stress exists at the joint of the reinforcing plate 130 and the pile body 120, the arc-shaped surface 141 concave to the pile body 120 can play a role in dispersing the stress, stress concentration is avoided, the strength of the joint of the reinforcing plate 130 and the pile body 120 is ensured, the connection firmness of the pile body 120 and the reinforcing plate 140 is enhanced, and the integral structural stability of the composite foundation 100 is ensured. It will be appreciated that the surface of the plate 140 opposite the arcuate face 141 is connected to the pilings 120. In this embodiment, a reinforcing plate 140 is disposed between two adjacent reinforcing plates 130, so that the overall structure is stable. The reinforcing plate 140 is disposed opposite to and spaced from the bearing wall 111. Of course, in other embodiments, the reinforcing plate 140 between two adjacent reinforcing plates 130 may be omitted.

The composite foundation 100 further includes a first reinforcing rib 150, and the first reinforcing rib 150 is disposed on the bearing wall 111 to increase the strength of the bearing wall 111 and improve the local structural stability of the suction bucket 110. The two ends of the first rib 150 are respectively connected to the two adjacent reinforcing plates 130, so that the first rib 150 can be more firmly disposed on the bearing wall 111, and the two adjacent reinforcing plates 130 can be prevented from deforming to approach or separate from each other. The first reinforcing rib 150 may be made of flat bulb steel.

Further, the number of the first reinforcing ribs 150 between at least one set of two adjacent reinforcing plates 130 is at least two, and the first reinforcing ribs 150 between two adjacent reinforcing plates 130 are spaced apart from each other, so as to uniformly fill the bearing wall 111, thereby increasing the strength of the bearing wall 111, and further prevent the two adjacent reinforcing plates 130 from deforming to approach or separate from each other, thereby enhancing the structural stability of the whole suction bucket 110. In this embodiment, the number of the first reinforcing ribs 150 between two adjacent reinforcing plates 130 is plural, and the first reinforcing ribs 150 are disposed between two adjacent reinforcing plates 130. Of course, in other embodiments, the number of the first reinforcing beads 150 between two adjacent reinforcing plates 130 can be flexibly adjusted, and the first reinforcing beads 150 between two adjacent reinforcing plates 130 can be omitted.

Referring to fig. 1 again, the composite foundation 100 further includes a second reinforcing rib 160, and the second reinforcing rib 160 is disposed on the sidewall 112 along the depth direction of the suction bucket 110 to increase the strength of the sidewall 112 and improve the partial structural stability of the suction bucket 110. The number of the second reinforcing ribs 160 may be plural, and a plurality of the second reinforcing ribs 160 are spaced around the tub cavity to further increase the strength of the side wall 112.

Referring to fig. 2 again, the composite foundation 100 further includes a water pipe 170 and a water pump (not shown), the pile body 120 is provided with a hollow cavity, one end of the water pipe 170 is communicated with the barrel cavity, one end of the water pipe 170 is located in the hollow cavity, and the other end of the water pipe 170 is communicated with the water pump. The arrangement of one end of the water pipe 170 in the hollow cavity can protect the water pipe 170 by the peripheral wall of the pile body 120, so as to prolong the service life of the water pipe 170. When the composite foundation 100 sinks to the position near the mud surface, the water pump is started to pump out water in the barrel cavity, so that negative pressure is formed in the barrel cavity, under the action of the negative pressure, the side wall 112 is inserted into the mud surface, and the composite foundation 100 sinks to a preset elevation. It should be noted that the air in the barrel chamber can be simultaneously pumped out while the water in the barrel chamber is pumped out.

Further, the number of the water pipes 170 is at least two, and one end of the at least two water pipes 170 communicated with the barrel cavity is arranged at intervals. When water is pumped, the negative pressure at different positions in the barrel cavity can be adjusted by controlling the water flow speed of water in different water pipes 170 and the like, so that the composite foundation 100 is prevented from inclining in the sinking process, and the sinking accuracy of the composite foundation 100 is improved conveniently. It can be understood that when the number of the water pipes 170 is at least two, the number of the water pumps is also flexibly adjusted according to the number of the water pipes.

Further, the composite foundation 100 further includes a controller (not shown), the water pump corresponds to the water pipe 170, the controller is electrically connected to the water pump, and the controller can control the water flow rate of the water in the water pipe 170 corresponding to the water pump by controlling the water pump. The controller may be a computer or the like. The composite foundation 100 also includes a gauge (not shown) for measuring the inclination of the composite foundation 100 to facilitate more accurate leveling by the controller. The gauges may be electrically connected to the controller to combine to form a control system to further achieve accurate leveling.

Further, when the composite foundation 100 needs to be removed, a water pump can be used for injecting water into the water pipe 170, and positive pressure is formed after the water is injected into the barrel cavity, so that the part of the composite foundation 100 inserted into the mud surface is ejected out of the mud surface, and the composite foundation is simple and convenient. The manner in which the composite foundation 100 is ejected may reduce or avoid damage to the composite foundation 100 due to removal, facilitating full utilization of the composite foundation 100.

The composite foundation 100 further comprises a cable tube 180, the pile body 120 is further provided with a through hole communicated with the hollow cavity, and the cable tube 180 is arranged in the through hole in a penetrating manner. The cable can be inserted into the cable tube 180, so the cable can enter the hollow cavity through the through hole, the peripheral wall of the pile body 120 can protect the cable, and the cable tube 180 does not need to be sleeved on part of the cable in the hollow cavity, thereby the length of the cable tube 180 can be reduced, and the cost is reduced.

Referring to fig. 1 again, the composite foundation 100 further includes a bearing platform 191, the bearing platform 191 is disposed on the peripheral wall of the pile body 120, and the bearing platform 191 and the bearing wall 111 are disposed opposite to each other at an interval. The platform 191 may function to support a worker, such that the worker may work on the platform 191 (e.g., to mount a wind turbine to the pile 120).

The composite foundation 100 further comprises a climbing ladder 192, the climbing ladder 192 is arranged on the peripheral wall of the pile 120 along the height direction of the pile 120, the climbing ladder 192 is positioned between the bearing platform 191 and the suction bucket 110, and one end of the climbing ladder 192 is close to the bearing platform 191. Since the height of the platform 191 is generally high, the worker can reach the platform 191 by means of the climbing ladder 192.

The fan system in one embodiment can be used for wind power generation. The fan system includes a fan and the composite foundation 100 as described above, the fan is disposed on the pile body 120, and the fan is away from the suction bucket 110. In this embodiment, the fan is disposed on the pile 120 through a flange. Because the fan system includes above-mentioned compound basis 100, so the fan system possesses the technological effect of above-mentioned compound basis 100, can improve the stability of being connected of pile body 120 and suction bucket 110 to guarantee the holistic structural stability of fan system, prevent that fan system from taking place incident such as collapsing.

The fan system and the composite foundation 100 thereof have at least the following advantages:

after the composite foundation construction is completed, the worker reaches the bearing platform 191 through the climbing ladder, and the fan is mounted on the pile body 120 by means of the flange, so that the fan system is formed.

In service, the part of the conventional rock-socketed pile body 120 in contact with the mud surface is easily washed by seawater, so that less mud is left around the rock-socketed pile body 120. In the above embodiment, the pile body 120 is disposed on the steel suction bucket 110, and the material on the suction bucket 110 is difficult to be washed away by seawater, so that the stability of the pile body 120 is ensured.

After the service period expires, a water pump can be used for injecting water into the water pipe 170, and positive pressure is formed after the water is injected into the barrel cavity, so that the part of the composite foundation 100 inserted into the mud surface is ejected out of the mud surface.

Referring to fig. 3, a construction method of a composite foundation in an embodiment includes the following steps:

and S100, providing the composite foundation. The composite foundation may be designed to be manufactured or purchased directly. Taking design and manufacture as an example, during design, a preset elevation where the composite foundation needs to sink can be determined, and then the size of the barrel cavity can be designed according to the preset elevation. During manufacture, the pile body is arranged on the suction bucket, the reinforcing plate is erected on the bearing wall, and the reinforcing plate is connected with the pile body. And arranging the reinforcing plates on the peripheral wall of the pile body, and connecting the reinforcing plates with the reinforcing plates on two sides of the reinforcing plates. The first reinforcing rib is welded to the bearing wall, and the second reinforcing rib is welded to the side wall. The manufacturing process may be completed at the surface.

S200, hoisting the composite foundation into water. And (4) transporting the fan system to a construction position by using a transport ship, and hoisting the composite foundation into water to enable the composite foundation to sink to the position near the mud surface according to the dead weight.

S300, pumping out water in the barrel cavity to enable negative pressure to be formed in the barrel cavity, and sinking the composite foundation to a preset elevation under the action of the negative pressure. When the composite foundation sinks to the position near the mud surface, the water pump is turned on to pump out water in the barrel cavity, so that negative pressure is formed in the barrel cavity, the side wall is inserted into the mud surface under the action of the negative pressure, and the composite foundation sinks to a preset elevation. It should be noted that the air in the barrel chamber can be simultaneously pumped out while the water in the barrel chamber is pumped out. In the sinking process, the controller can control the water flow speed of water in the water pipe corresponding to the water pump by controlling the water pump so as to realize accurate leveling and ensure that the composite foundation sinks vertically.

the noise and vibration generated during construction are small, and the influence on marine organisms is small. The construction difficulty is low, the construction time is short, and the applicable water depth can reach below 55 m. Applicable in more soil type, like soft clay or boulder clay etc. can not carry out the reconnaissance to deep soil, can effectively avoid the rock-socketed.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A composite foundation, comprising:

2. The composite foundation of claim 1 wherein the reinforcement plate has an arcuate face that is concave toward the pilings.

3. The composite foundation of claim 1, wherein the reinforcing plate is provided with mud-containing holes, and the mud-containing holes penetrate through the reinforcing plate.

4. The composite foundation of claim 1, further comprising a first reinforcing rib, wherein the first reinforcing rib is disposed on the bearing wall, and two ends of the first reinforcing rib are respectively connected to two adjacent reinforcing plates.

5. The composite foundation of claim 4 wherein said first reinforcement rib is at least two between at least one set of two adjacent said reinforcement plates, said first reinforcement rib being spaced between two adjacent said reinforcement plates.

6. The composite foundation of any one of claims 1 to 5, further comprising a water pipe and a water pump, wherein the pile body is provided with a hollow cavity, one end of the water pipe is communicated with the barrel cavity, one end of the water pipe is located in the hollow cavity, and the other end of the water pipe is communicated with the water pump.

7. The composite foundation of claim 6 wherein the number of said water pipes is at least two, and at least two of said water pipes are spaced apart from one end of said barrel cavity in communication therewith.

8. The composite foundation of claim 6, further comprising a cable tube, wherein the pile body is further provided with a through hole communicated with the hollow cavity, and the cable tube is inserted into the through hole.

9. A fan system, comprising:

a composite foundation as claimed in any one of claims 1 to 8; and

10. The construction method of the composite foundation is characterized by comprising the following steps:

providing a composite foundation according to any one of claims 1 to 8;

hoisting the composite foundation into water; and