CN220550584U - Offshore wind power cylindrical foundation capable of reducing soil plugs - Google Patents
Offshore wind power cylindrical foundation capable of reducing soil plugs Download PDFInfo
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- CN220550584U CN220550584U CN202321743204.5U CN202321743204U CN220550584U CN 220550584 U CN220550584 U CN 220550584U CN 202321743204 U CN202321743204 U CN 202321743204U CN 220550584 U CN220550584 U CN 220550584U
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- 239000002689 soil Substances 0.000 title claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000005086 pumping Methods 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 8
- 230000010354 integration Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 239000002131 composite material Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000035515 penetration Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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Abstract
The utility model discloses an offshore wind power cylindrical foundation capable of reducing a soil plug, which belongs to the field of marine foundation structures and comprises a cylinder body, wherein the cylinder body is in an inverted cup shape with a closed upper end and an open lower end, a water pumping port is arranged on a top cover of the cylinder body, and a grid plate structure is arranged in the cylinder body and is used for playing roles of slow flow, rectification and slow water flow rate when negative pressure is provided for pumping water, so that the hydraulic gradient is reduced, and the phenomenon of the soil plug is reduced. The utility model is prefabricated by a factory, has high integration degree, is applied to the offshore wind power foundation, can not only reduce the phenomenon of soil plugs, but also has the technical effect of improving the integral bearing capacity of the foundation.
Description
Technical Field
The utility model relates to the field of ocean foundation structures, in particular to an offshore wind power cylindrical foundation capable of reducing a soil plug.
Background
The cylindrical foundation is a foundation type with good development prospect applied to offshore wind power engineering for nearly thirty years, when the foundation is installed, the foundation is sunk to the seabed by dead weight to a certain depth to form effective sealing, air and water in the cylindrical foundation are pumped out by a pump to form negative pressure, and the foundation is sunk to a preset depth by utilizing the pressure difference between the inside and the outside of the cylindrical foundation. The use of negative pressure sinking is a major feature of the cylindrical foundation, but the existing data indicate that the cylindrical foundation can generate soil plugs in the process of negative pressure sinking. The soil plug is characterized in that the cylindrical foundation is upwards choked up under the action of pressure difference between the inside and the outside of the cylinder or seepage force in the negative pressure sinking process, and is contacted with the cylinder top cover in advance in the later stage of sinking, so that the cylindrical foundation cannot sink to the designed depth. The existence of the soil plug brings difficulty to the installation and construction of the foundation, prolongs the time of the installation operation, and simultaneously, the sinking of the cylindrical foundation can not only influence the bearing capacity of the foundation, but also aggravate the scouring of water flow to the soil around the foundation because the foundation is higher than the mud surface, thereby endangering the safety of the foundation.
The utility model discloses a suction bucket foundation composite construction that soil plug was clear away and interior soil body of bucket was consolidated of chinese patent grant publication number CN114411795B, through at barrel external mounting fixed bolster, is connected with the stirring head that stretches into in the barrel, clears away the soil plug in the barrel through the mode of rotatory stirring, and its technical limitation lies in: the soil body in the cylinder is tamped into slurry in a rotary stirring mode, so that although the soil plug is removed, the strength of the soil body in the cylinder is reduced, and the normal use of a later-stage foundation is influenced by the weakening of the bearing capacity of the soil body; in addition, the method needs to be externally connected with a fixed support, is complex in construction and increases the consumption of manpower and material resources. Therefore, there is a need for a compact, inexpensive composite cylindrical foundation form that mitigates the phenomenon of soil blocking.
Disclosure of Invention
In view of the above technical drawbacks, an object of the present utility model is to provide a offshore wind power cylindrical foundation capable of reducing the occurrence of a soil plug by providing a grid structure inside the cylindrical foundation. It has been shown that the seepage flow from bottom to top is generated in the foundation under the action of negative pressure, and the earth flow phenomenon is generated, which is one of the important reasons for generating the earth plug in the sinking process of the cylindrical foundation under the negative pressure, the height of the earth plug is in direct proportion to the wall thickness of the foundation and the penetration depth, and is irrelevant to the magnitude of the negative pressure, the larger the negative pressure is applied, the larger the hydraulic gradient in the foundation soil is, and the sinking speed of the cylindrical foundation is higher. Therefore, by utilizing the grid plate structure provided by the utility model, the functions of slow flow and rectification can be effectively achieved, and the water flow speed is reduced, so that the hydraulic gradient in the cylinder is reduced, and the soil plug phenomenon is lightened; meanwhile, in the later stage of foundation sinking, the grid plate structure made of the thin steel plate can weaken and crush the soil plug, and the height of the soil plug is directly reduced.
In order to achieve the technical purpose, the utility model adopts the following technical means:
an offshore wind turbine foundation capable of reducing earth plugs, comprising:
the cylinder, the cylinder is the upper end and seals lower extreme open-ended inversion cup, is equipped with the water sucking mouth on the top cap of cylinder, cylinder internally mounted grid tray structure, grid tray structure is used for playing the effect of slow flow, rectification, slowing down the water velocity of flow when the negative pressure is provided in the water pumping to reduce the hydraulic gradient, alleviate the phenomenon of soil plug.
The inside of the bin body of the cylinder body is divided into independent bins by a bin dividing plate and an inner skirt plate, the independent bins are respectively a middle bin positioned in the center of the bin body of the cylinder body and a plurality of side bins with the same volume and shape positioned between the middle bin and the inner wall of the cylinder body, and a water pumping port with the same size is respectively arranged on each bin on the top cover;
the grid plate structures are respectively arranged in the middle bin and the side bin.
The grid plate structure in the side bin comprises at least two layers of grid plates, one layer of grid plates is annularly arranged along the plane of the cylinder body, and the other layer of grid plates is radially arranged along the plane of the cylinder body.
The grid plate structures are all positioned in the height range of 1/5 of the upper part of the cylinder body, and are integrally connected with the cylinder body; the grid plates are all thin steel plates with the thickness not more than 5mm, the height not more than 100mm, and the length of the grid plates is adapted to the size of the bin;
the spacing between each grid plate is between 0.1m and 0.2 m;
the distance between the upper grid plate and the lower grid plate is 0.2m to 0.3 m.
The number of the side bins is six, and the six side bins are uniformly and symmetrically arranged along the axis of the cylinder body.
The middle bin is a cylindrical bin.
Advantageous effects
Compared with the prior art, the utility model has the beneficial technical effects that:
1. according to the offshore wind power cylindrical foundation capable of reducing the soil plug, the grid plate structure is arranged in the cylindrical foundation, so that the effects of slow flow and rectification are achieved when negative pressure is provided for pumping water, the flow velocity of water is slowed down, the hydraulic gradient is reduced, and the phenomenon of the soil plug is reduced; meanwhile, in the later stage of foundation sinking, the grid plate structure made of the thin steel plate can weaken and crush the soil plug, and the height of the soil plug is directly reduced. Compared with the prior art, the integrated factory prefabricating device for the cylindrical foundation is prefabricated in a factory, the prefabricated factory and the cylindrical foundation are welded, the integrated factory prefabricating device has quite high integrity, manual assistance is not needed in the use process, and consumption of manpower and material resources is reduced.
2. The offshore wind power cylindrical foundation capable of reducing the soil plugs has high integrity and material consistency with the cylindrical foundation due to the existence of the grid plate structure, so that the integral bearing capacity of the cylindrical foundation can be improved, and the structural stability is improved.
3. The offshore wind power cylindrical foundation capable of reducing the soil plugs provided by the utility model is divided into independent bins, and comprises a middle bin and six side bins; at least two layers of grid plate structures which are mutually perpendicular are arranged in the middle bin; at least two layers of grid plate structures are arranged in the six side bins, and the independent bin can further improve the basic bearing capacity.
4. The offshore wind power cylindrical foundation capable of reducing the soil plug provided by the utility model can block part of sand and stone and prevent the water pumping pipe from being blocked because of the mutually staggered grid plate structures in the cylinder in the use process.
Drawings
Fig. 1 is a bottom plan view of the barrel foundation of the present utility model.
Fig. 2 is a top plan view of the barrel foundation of the present utility model.
Fig. 3 is a schematic view of the bottom structure of the barrel foundation of the present utility model.
Fig. 4 is a vertical cross-sectional view of the cylindrical foundation of the present utility model.
Fig. 5 is a schematic view of the structure of the grid plate in the middle bin in the cylindrical foundation of the present utility model.
FIG. 6 is a schematic view of the structure of the grid plate in the side bin of the tubular foundation of the present utility model.
In the figure: 1. a cylinder; 2. a top cover; 3. an inner skirt plate; 4. a dividing plate; 5. a side bin; 6. a middle bin; 7. a water pumping port; 8. a grid plate.
Description of the embodiments
The following description of the embodiments of the present utility model and the specific embodiments of the present utility model will further describe the technical solutions of the present utility model in detail, and it should be apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All embodiments obtained by a person of ordinary skill in the art without making any inventive effort based on the embodiments of the present utility model are within the scope of the present utility model.
Examples
Barrel 1, barrel 1 is the upper end and seals lower extreme open-ended inversion cup, is equipped with water sucking mouth 7 on the top cap 2 of barrel 1, barrel internally mounted grid tray structure, grid tray structure is used for playing the effect of slow flow, rectification, slowing down the water velocity of flow when the negative pressure is provided in the water pumping to reduce the hydraulic gradient, alleviate the phenomenon of soil plug.
As a preferred version of embodiment 1, the grid structure comprises at least two mutually perpendicular grids 8, one arranged circumferentially along the plane of the cylinder and the other radially along the plane of the cylinder. The number of layers of the louver 8 structure is not particularly limited, and may be specifically determined according to the type, size, etc. of the cylindrical foundation, and generally, the larger the size, the higher the height, the larger the number of layers of the louver 8 structure is required.
Examples
Referring to fig. 1-6, embodiment 2 differs from embodiment 1 in that the barrel 1 is divided into separate chambers, including a middle chamber 6 and six side chambers 5; at least two layers of grid plates 8 which are mutually perpendicular are arranged in the middle bin 6; the six side bins 5 are internally provided with at least two layers of grid plate 8 structures, the inside of the barrel is provided with a honeycomb-shaped dividing plate 4 and an inner apron plate 3, the inside of the barrel is divided into independent bins, the round bin positioned at the center of the barrel is a middle bin 6, the six bins with the same edge structure are side bins 5, the contact area between the barrel and soil is increased in a dividing manner, the stability and bearing capacity of a barrel-shaped foundation can be improved, the top cover 2 of the composite barrel-shaped foundation is provided with seven water pumping ports 7 with the same size, the water pumping ports are respectively positioned on the seven bins, and the suction of each bin is conveniently and independently controlled, so that the purposes of stably sinking the foundation and finely leveling the foundation are achieved.
Furthermore, the middle bin 6 is a cylindrical bin and is separated by an inner skirt plate 3 structure, the diameter of the bottom surface is half of that of the bottom surface of the cylinder body 1, and the prior researches show that the middle part of the composite cylindrical foundation is designed into a circular bin, so that the bearing capacity of the foundation can be improved, at least two layers of mutually perpendicular grid plates 8 are arranged in the composite cylindrical foundation, the penetration of the cylindrical foundation is not influenced, the head loss can be improved, the water flow is slowed down and rectified, the speed of the water flow is slowed down, and the staggered angles among the grid plates are not strictly regulated and are specifically selected according to the shape of the cylindrical foundation so as to achieve the best effect.
Further, six the limit storehouse 5 size is the fan-shaped, all is equipped with two layer at least grid tray 8 structures in every limit storehouse 5, and one deck sets up along barrel plane hoop, and one deck radially sets up along barrel plane, when playing the slow flow rectification effect, in the later stage that the basis was sunk, grid tray 8 and the barrel interior soil body contact in place of sheet steel material can weaken, broken soil plug, directly reduce soil plug height.
As a further limitation of the technical scheme of the embodiment of the utility model, the grid plates 8 are all positioned in the height range of the upper part 1/5 of the cylinder body 1, and play a role in reducing the flow velocity of water flowing through to the greatest extent on the basis of not influencing the penetration of the cylinder-shaped foundation;
the grid plate 8 and the cylinder body 1 are prefabricated in an integrated factory and welded, so that the integrity and the material consistency between the cylindrical foundation and the grid plate structure are improved, and the overall bearing capacity and the stability of the foundation are improved;
as a further limitation of the technical scheme of the embodiment of the utility model, the grid plates 8 are all thin steel plates, the thickness is not more than 5mm, the height is not more than 100mm, and the length is adapted to the size of the bin;
the distance between each grid plate is between 0.1m and 0.2m according to the size of a large-scale coarse grid, the distance between the upper grid plate and the lower grid plate is between 0.2m and 0.3m, the coarser grid can play the roles of slowing down the flow rate and intercepting sand and stones on the basis of not influencing the penetration of the foundation, and the fact that the distance between the grid plates is closely related to the basic size is required, and for a large-scale cylindrical foundation, if too dense grid plates are selected, the resistance is increased, and the difficulty of foundation penetration is improved.
In the earlier stage of the negative pressure sinking of the cylindrical foundation, the grid plate 8 reduces the hydraulic gradient by reducing the flow velocity, so as to achieve the aim of reducing the soil plug; in the later stage of the negative pressure sinking of the cylindrical foundation, the grid plate 8 is in contact with soil in the cylinder to directly weaken and crush the soil plug, reduce the height of the soil plug and assist the cylindrical foundation to sink in place; after the cylindrical foundation is installed in place, the grid 8 can improve stability and load-bearing capacity during construction of the cylindrical foundation.
The working principle of the utility model is explained as follows:
according to Darcy's law (wherein is the velocity of flow, is the permeability coefficient, is the hydraulic gradient) it is known that the hydraulic gradient and the velocity of flow become the first power proportional relation, and from the research it is known that in the negative pressure sinking process of cylindric basis, the hydraulic gradient direction in the section of thick bamboo upwards, represents the water flow direction in the section of thick bamboo upwards, drives silt upward movement, thereby forms the soil plug. The larger the hydraulic gradient is, the faster the cylindrical foundation sinks, the higher the formed soil plug is, and the height of the soil plug is in direct proportion to the hydraulic gradient in the cylindrical foundation cylinder. The hydraulic gradient can be reduced by reducing the permeation flow rate, so that the soil blockage phenomenon is reduced. According to the prior research results, the final height of the soil plug is irrelevant to the applied negative pressure, and the change of the negative pressure can only cause the sinking speed of the cylindrical foundation, so that the soil plug is lightened by reducing the negative pressure, namely reducing the suction force, and the sinking speed of the cylindrical foundation is reduced only because the negative pressure is reduced, so that the soil plug is slower. Therefore, the method of controlling the soil plug by reducing the suction force is not preferable in the prior art, and the engineering progress is also affected.
What is not described in detail in this specification is prior art known to those skilled in the art.
Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.
Claims (5)
1. An offshore wind turbine foundation capable of reducing earth plugs, comprising:
the water pump is characterized in that a grid plate structure is arranged in the barrel, and the grid plate structure is used for playing roles of slow flow, rectification and slow water flow rate when negative pressure is provided for pumping water, so that the hydraulic gradient is reduced, and the phenomenon of soil blockage is lightened;
the inside of the bin body of the cylinder body (1) is divided into independent bins by a bin dividing plate (4) and an inner skirt plate (3), the independent bins are respectively a middle bin (6) positioned at the center of the bin body of the cylinder body (1) and a plurality of side bins (5) with the same volume and shape positioned between the middle bin (6) and the inner wall of the cylinder body, and a water pumping port (7) with the same size is respectively arranged on the top cover (2) and positioned above each bin;
the grid plate structures are respectively arranged in the middle bin and the side bin.
2. Offshore wind power cylindrical foundation capable of reducing soil plugs according to claim 1, characterized in that the grid structure in the side bin comprises at least two layers of grids (8), one layer being arranged circumferentially along the plane of the cylinder and the other layer being arranged radially along the plane of the cylinder.
3. Offshore wind power cylindrical foundation capable of reducing soil plugs according to claim 2, characterized in that the grid plate structures are all located within the height range of the upper 1/5 cylinder of the cylinder (1), and the grid plate structures are integrally connected with the cylinder (1); the grid plates (8) are all thin steel plates with the thickness not more than 5mm, the height not more than 100mm, and the lengths of the grid plates are matched with the size of the bin;
the spacing between each grid plate is between 0.1m and 0.2 m;
the distance between the upper grid plate and the lower grid plate is 0.2m to 0.3 m.
4. The offshore wind turbine foundation capable of reducing soil plugs according to claim 2, wherein the number of the side bins is six, and the six side bins are uniformly and symmetrically arranged on the axis of the barrel.
5. Offshore wind power cylindrical foundation capable of reducing earth plugs according to claim 2, characterized in that the intermediate bin (6) is a cylindrical bin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321743204.5U CN220550584U (en) | 2023-07-05 | 2023-07-05 | Offshore wind power cylindrical foundation capable of reducing soil plugs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321743204.5U CN220550584U (en) | 2023-07-05 | 2023-07-05 | Offshore wind power cylindrical foundation capable of reducing soil plugs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220550584U true CN220550584U (en) | 2024-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321743204.5U Active CN220550584U (en) | 2023-07-05 | 2023-07-05 | Offshore wind power cylindrical foundation capable of reducing soil plugs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220550584U (en) |
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2023
- 2023-07-05 CN CN202321743204.5U patent/CN220550584U/en active Active
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