CN211849560U - Offshore wind power multi-pile-suction bucket-jacket foundation structure - Google Patents
Offshore wind power multi-pile-suction bucket-jacket foundation structure Download PDFInfo
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- CN211849560U CN211849560U CN202020037710.2U CN202020037710U CN211849560U CN 211849560 U CN211849560 U CN 211849560U CN 202020037710 U CN202020037710 U CN 202020037710U CN 211849560 U CN211849560 U CN 211849560U
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Abstract
The utility model relates to a many piles of offshore wind power-suction bucket-jacket foundation structure. The utility model aims at providing a marine wind power multi-pile-suction bucket-jacket foundation structure that simple structure, construction convenience, cost are lower, safety and stability. The technical scheme of the utility model is that: the utility model provides an offshore wind power multi-pile-suction bucket-jacket foundation structure which characterized in that: the device comprises a jacket, a plurality of suction barrels, a guide sleeve, a high-strength grouting material and a plurality of guide pipes, wherein the plurality of suction barrels are uniformly arranged at the bottom of the jacket, the center of the top of each suction barrel is provided with the guide sleeve communicated with the inside of the suction barrel, the jacket is supported on a seabed through the suction barrels and is fixed on the seabed through steel pipe piles inserted into the guide sleeves and driven into the seabed, and the high-strength grouting material is poured in gaps between the guide sleeves and the steel pipe piles. The utility model is suitable for an ocean engineering technical field.
Description
Technical Field
The utility model relates to a many piles of offshore wind power-suction bucket-jacket foundation structure. Is applicable to the technical field of ocean engineering.
Background
Wind power generation is one of the most mature, scaled and commercialized power generation modes in the new energy field. Compared with the onshore wind power plant, the offshore wind power plant is more and more emphasized by developed countries due to the advantages of superior wind resources, environmental protection, land conservation, large scale and the like, and the offshore wind power plant construction is set as the key point of large-scale wind power development in the future in Germany, England, Denmark and other countries.
At present, common offshore wind turbine foundations are gravity foundations, single-pile foundations, multi-pile jacket foundations, high-pile cap foundations, suction bucket jacket foundations, composite bucket foundations and the like. Wherein, the basic type of many stake jacket foundations is as follows: the seabed is driven into with 3 or more than 3 steel-pipe piles, and the jacket lower extreme sets up the sleeve pipe, adopts the excel in grout to be connected between sleeve pipe and the steel-pipe pile, adopts the flange to link to each other between jacket top and the tower section of thick bamboo.
In a sea area with water depth exceeding 35m, the traditional fan foundation types such as gravity type, single pile and high pile cap face the problems of huge size, low integral rigidity, aggravated wave load and the like of a foundation structure, and the jacket foundation can assemble steel into a space structure with proper size by welding steel pipe members so as to meet the water depth condition; the rigidity of the jacket foundation is relatively high, and the frequency requirement of a high-capacity fan can be better met in a deepwater wind farm; due to the relatively small diameter of the steel pipes, the wave load on the jacket is relatively smaller under deep water conditions. Therefore, the multi-pile jacket foundation has wide adaptability, and is particularly suitable for projects with large single-machine capacity, deep water and low requirements on seabed geological conditions. With the continuous development of offshore wind power, offshore wind power projects gradually develop towards the directions of being farther offshore (beyond 50 km) and deeper in water depth (more than 30 m), the capacity of a single machine tends to be large, and a multi-pile jacket foundation is applied more and more widely.
The multi-pile jacket foundation has high construction precision requirements on the plane position and the perpendicularity of the steel pipe pile, an auxiliary positioning guide frame is usually adopted at present as a tool for controlling the plane position and the perpendicularity precision in the pile sinking process, and the auxiliary positioning guide frame consists of the steel pipe pile and the guide frame. The construction process of the multi-pile jacket foundation is generally as follows: manufacturing steel pipe piles and a jacket → transporting the steel pipe piles and the jacket → conducting steel pipe pile sinking construction of an auxiliary positioning guide frame → installing the guide frame → conducting steel pipe pile sinking construction → dismantling the guide frame → dismantling the steel pipe piles of the auxiliary positioning guide frame → sinking and leveling the jacket → connecting the steel pipe piles and the jacket through grouting. The multi-pile jacket foundation has high rigidity and high bearing capacity, but the construction process is complex.
Along with the development of an offshore wind power plant to a deepwater sea area, the wave current load borne by the foundation is increased, and in order to ensure the precision control and the safety and stability in the pile sinking process, the sizes of the steel pipe pile of the auxiliary positioning guide frame and the guide frame are increased. In addition, the seabed surface layer of the coastal part area in China has soft soil layers with the thickness of more than 20 meters, such as silt clay and the like, the bearing capacity of the foundation is poor, and shallow foundations such as a suction bucket jacket foundation and the like are difficult to apply; if a multi-pile jacket foundation is adopted, the pile diameter and the pile length of the multi-pile jacket foundation are increased, and the steel consumption of the foundation is higher.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: aiming at the existing problems, the offshore wind power multi-pile-suction bucket-jacket foundation structure is simple in structure, convenient to construct, low in cost, safe and stable.
The utility model adopts the technical proposal that: the utility model provides an offshore wind power multi-pile-suction bucket-jacket foundation structure which characterized in that: the device comprises a jacket, a plurality of suction barrels, a guide sleeve, a high-strength grouting material and a plurality of guide pipes, wherein the plurality of suction barrels are uniformly arranged at the bottom of the jacket, the center of the top of each suction barrel is provided with the guide sleeve communicated with the inside of the suction barrel, the jacket is supported on a seabed through the suction barrels and is fixed on the seabed through steel pipe piles inserted into the guide sleeves and driven into the seabed, and the high-strength grouting material is poured in gaps between the guide sleeves and the steel pipe piles.
And a plurality of shear keys are uniformly and alternately arranged on the inner wall of the guide sleeve and the outer wall of the steel pipe pile.
The jacket is supported at the top end of the suction barrel, and the guide sleeve is connected with the jacket through a connecting rod.
And the top end of the guide sleeve is provided with a circle of flange used for connecting a sealing cover to seal the guide sleeve.
And the top elevation of the steel pipe pile is about 0.5m higher than that of the guide sleeve.
The construction method of the offshore wind power multi-pile-suction bucket-jacket foundation structure is characterized by comprising the following steps of:
welding the jacket, the suction bucket and the guide sleeve into an integral structure in a factory;
sealing the guide sleeve by a sealing cover;
transporting the overall structure to a wind farm;
in the sinking process of the whole structure, negative pressure is generated by pumping out water in the suction barrel, the jacket structure of the suction barrel gradually sinks under the action of the negative pressure, and meanwhile, leveling is carried out;
after the integral structure sinks to the designed elevation, removing a sealing cover for sealing the guide sleeve;
inserting the steel pipe pile into the guide sleeve, and driving the steel pipe pile into the seabed by adopting a pile driving hammer under the guide action of the guide sleeve;
and injecting a high-strength grouting material between the guide sleeve and the steel pipe pile.
The sealing cover is fixed on a flange at the top end of the guide sleeve through bolts.
And a rubber gasket is padded between the sealing cover and the flange.
The utility model has the advantages that:
the utility model discloses a connect the suction bucket in jacket bottom, enlarged the application range of foundation structure and shallow soil body, increased basic bearing capacity and rigidity, can reduce the long and stake footpath of pile of steel-pipe pile, and then reduce the pile sinking degree of difficulty and optimize the steel volume for the basis.
The utility model discloses well guide sleeve who combines with suction bucket plays the effect of location direction to steel-pipe pile sinking, does not need the assistance-localization real-time leading truck, has practiced thrift engineering cost.
The utility model relates to a construction method need not call ship machine equipment and demolishs steel-pipe pile and leading truck of assistance-localization real-time leading truck, has optimized the work progress, has reduced construction cost and time limit for a project.
The utility model discloses the steel barrel body of well suction bucket plays the scour prevention effect to the basis, can reduce the scour prevention protection engineering volume.
Drawings
Fig. 1 is a schematic structural diagram of the embodiment.
Fig. 2 is a top view of the embodiment.
Fig. 3 is a schematic view of an integrated structure made of a jacket, a suction bucket, and a guide sleeve in the embodiment.
Fig. 4 is a schematic view showing the connection of the cap to the guide sleeve in the embodiment.
FIG. 5 is a schematic view showing the connection between the steel pipe pile and the guide sleeve in the embodiment.
Detailed Description
As shown in fig. 1 and 2, the embodiment is an offshore wind power multi-pile-suction bucket 2-jacket foundation structure, which includes a jacket 1, a fan tower is connected to the top end of the jacket 1, the lower end of the jacket 1 is supported on the tops of 4 suction buckets 2, and the 4 suction buckets 2 are uniformly distributed and welded to the jacket 1.
In the embodiment, the axis of the suction barrel 2 is parallel to the axis of the tower drum of the fan, the top of the suction barrel 2 is provided with a guide sleeve 4 which is concentric and coaxial with the suction barrel, and the guide sleeve 4 is connected with the guide pipe frame 1 through a connecting rod 11. The upper end of the guide sleeve 4 is provided with a circle of flange 7, and the lower end of the guide sleeve 4 extends to the top of the suction barrel 2 and is communicated with the suction barrel 2.
In the embodiment, the jacket 1 is supported on the seabed through the suction bucket 2 (see fig. 3), the steel pipe pile 3 is coaxially inserted into the guide sleeve 4 on the suction bucket 2, the steel pipe pile 3 is driven into the seabed, and the high-strength grouting material 5 is poured into a gap between the guide sleeve 4 and the steel pipe pile 3 so as to realize the connection between the steel pipe pile 3 and the guide sleeve 4.
In order to enhance the connection between the guide sleeve 4 and the steel pipe pile 3, the shear keys 6 are uniformly and alternately arranged on the inner wall of the guide sleeve 4 and the outer wall of the steel pipe pile 3.
The specific construction method of the embodiment is as follows:
manufacturing and completing a jacket 1, a suction bucket 2, a steel pipe pile 3 and the like in a land factory;
welding the jacket 1, the suction bucket 2 and the guide sleeve 4 into an integral structure in a factory;
a sealing cover 8 is fixedly arranged on a flange 7 at the top end of the guide sleeve 4 through a bolt 9 so as to seal the guide sleeve 4, a rubber gasket 10 is arranged between the sealing cover 8 and the flange 7, and the rubber gasket 10 plays a role in sealing and prevents water leakage when water is pumped and sinks (see figure 4);
transporting the whole structure to a wind power plant, and completing ship positioning;
hoisting a sinking integral structure, generating negative pressure by pumping out water in the suction barrel 2 in the sinking process of the integral structure, gradually sinking the suction barrel 2 and the jacket 1 structure under the action of the negative pressure, and leveling by adjusting the internal and external pressure difference of each suction barrel 2 to ensure that the suction barrel 2 and the guide sleeve 4 are in a vertical state;
after the integral structure sinks to the designed height, a diver removes a sealing cover 8 for sealing and plugging the guide sleeve 4, a corresponding bolt 9 and a corresponding rubber gasket 10;
the steel pipe pile 3 is coaxially inserted into the guide sleeve 4, the steel pipe pile 3 is driven into the seabed by adopting a pile driving hammer under the guide action of the guide sleeve 4, and the top elevation of the steel pipe pile 3 is about 0.5m higher than that of the guide sleeve 4;
and (3) injecting a high-strength grouting material 5 (see figure 5) between the guide sleeve 4 and the steel pipe pile 3 to complete the connection between the steel pipe pile 3 and the integral structure.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art can change, add or replace the above examples within the scope of the present invention.
Claims (5)
1. The utility model provides an offshore wind power multi-pile-suction bucket-jacket foundation structure which characterized in that: evenly be equipped with a plurality of suction buckets (2) bottom jacket (1), suction bucket (2) top center system has with suction bucket (2) in the guide sleeve (4) of intercommunication, jacket (1) supports on the seabed through suction bucket (2), and through the cartridge in guide sleeve (4) and squeeze into steel-pipe pile (3) on the seabed are fixed in on the seabed, the clearance is poured into high strength grouting material (5) between guide sleeve (4) and steel-pipe pile (3).
2. Offshore wind power multi-pile-suction bucket-jacket foundation structure according to claim 1, characterized in that: and a plurality of shear keys (6) are uniformly and alternately arranged on the inner wall of the guide sleeve (4) and the outer wall of the steel pipe pile (3).
3. Offshore wind power multi-pile-suction bucket-jacket foundation structure according to claim 1 or 2, characterized in that: the jacket (1) is supported at the top end of the suction barrel (2), and the guide sleeve (4) is connected with the jacket (1) through a connecting rod (11).
4. Offshore wind power multi-pile-suction bucket-jacket foundation structure according to claim 1, characterized in that: the top end of the guide sleeve (4) is provided with a circle of flange (7) used for connecting a sealing cover (8) to seal the guide sleeve (4).
5. Offshore wind power multi-pile-suction bucket-jacket foundation structure according to claim 1, characterized in that: the top elevation of the steel pipe pile (3) is about 0.5m higher than that of the guide sleeve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020037710.2U CN211849560U (en) | 2020-01-08 | 2020-01-08 | Offshore wind power multi-pile-suction bucket-jacket foundation structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020037710.2U CN211849560U (en) | 2020-01-08 | 2020-01-08 | Offshore wind power multi-pile-suction bucket-jacket foundation structure |
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| CN211849560U true CN211849560U (en) | 2020-11-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111101535A (en) * | 2020-01-08 | 2020-05-05 | 中国电建集团华东勘测设计研究院有限公司 | Offshore wind power multi-pile-suction bucket-jacket foundation structure and construction method thereof |
| CN115158597A (en) * | 2022-06-30 | 2022-10-11 | 浙江大学 | Transportation method of pile-tube composite jacket foundation floating structure |
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2020
- 2020-01-08 CN CN202020037710.2U patent/CN211849560U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111101535A (en) * | 2020-01-08 | 2020-05-05 | 中国电建集团华东勘测设计研究院有限公司 | Offshore wind power multi-pile-suction bucket-jacket foundation structure and construction method thereof |
| CN115158597A (en) * | 2022-06-30 | 2022-10-11 | 浙江大学 | Transportation method of pile-tube composite jacket foundation floating structure |
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