CN209941726U - Offshore wind turbine single pile foundation reinforced pile foundation structure - Google Patents
Offshore wind turbine single pile foundation reinforced pile foundation structure Download PDFInfo
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- CN209941726U CN209941726U CN201920400049.4U CN201920400049U CN209941726U CN 209941726 U CN209941726 U CN 209941726U CN 201920400049 U CN201920400049 U CN 201920400049U CN 209941726 U CN209941726 U CN 209941726U
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Abstract
The utility model relates to an offshore wind turbine single pile foundation consolidates pile foundation structure, including offshore wind turbine single pile foundation, still include three at least round the steel-pipe pile of circumference equipartition is on the single pile foundation, from last down being equipped with a layer combination beam system structure between three at least steel-pipe piles and the single pile foundation, combination beam system structure is including fixed central sleeve of establishing in the single pile foundation outside, the telescopic outside in center is equipped with the corresponding skirt pile sleeve in the position that is the circumference equipartition and position and steel-pipe pile of at least three, the fixed outside of establishing at the steel-pipe pile of skirt pile sleeve cover, is fixed with the combination roof beam between skirt pile sleeve and the central sleeve. The utility model has the advantages of reasonable design, can improve the horizontal bearing capacity and rigidity, the structural overall stability of single pile basis, reduce investment cost simultaneously, have universal relevance nature, have extensive application prospect in ocean wind-powered electricity generation field.
Description
The technical field is as follows:
the utility model belongs to the technical field of offshore wind generating set foundation structure, especially, relate to an offshore wind generating set single pile basis consolidates pile foundation structure.
Background art:
at present, the types of wind turbine generator foundations used for offshore wind power plants at home and abroad are mainly four types, namely a pile foundation, a gravity foundation, a suction tube foundation and a floating foundation, wherein the pile foundation can be subdivided into a single-pile foundation, a multi-foot-frame foundation, a jacket foundation and a high-pile bearing platform foundation. The single pile foundation mainly comprises a large-diameter steel pipe pile, and the pile length and the embedding depth of the single pile foundation are determined by the water depth, the geological conditions and the load of a wind turbine generator set. The single-pile foundation is widely applied to offshore wind power plants abroad due to convenient and quick construction and good economical efficiency, and the occupation ratio of the single-pile foundation of the offshore wind power generation unit in the domestic offshore wind power plants is continuously improved along with the improvement of the construction capacity of ship equipment of offshore wind power construction in recent years.
The current largest single pile foundation pile diameter in China is 7-7.5 m, however, with the capacity increase of a fan unit, the load of the fan unit is further increased, the single pile foundation pile diameter reaches 8-10 m, and the construction capacity of a pile foundation of 8-10 m is unavailable at present in China. According to the statistics of the construction experience of the built and constructed offshore wind power plant, the large-diameter single-pile foundation has the defects that pile sinking verticality is difficult to control, pile sinking is difficult to achieve in a shallow geological condition of bedrock, the horizontal rigidity of a single pile with a lower horizontal rigidity is larger in a geological condition with a soft surface layer and a thicker soil body, and the like. The defects directly or indirectly affect the construction quality and the construction period of the single-pile foundation, and further improve the investment cost of the project. Along with the implementation of engineering, under the condition of complex marine geology, the problems that pile sinking is difficult to achieve in place, horizontal rigidity is insufficient, pile sinking verticality errors are overlarge and the like can occur in marine wind power single-pile foundation construction. How to efficiently and economically solve the problems becomes an urgent problem in the design and construction of the offshore wind power single-pile foundation.
The utility model has the following contents:
the utility model discloses make the improvement to the problem that above-mentioned prior art exists, promptly the utility model aims to solve the technical problem that a marine wind turbine generator system single pile basis consolidates pile foundation structure is provided, not only reasonable in design, construction convenience, of high quality moreover.
In order to realize the purpose, the utility model discloses a technical scheme is: the utility model provides an offshore wind turbine single pile foundation reinforced pile foundation structure, includes offshore wind turbine single pile foundation, still includes three at least round the steel-pipe pile that single pile foundation is the circumference equipartition, from last down being equipped with at least one layer composite beam system structure between three at least steel-pipe piles and the single pile foundation.
Furthermore, the combined beam system structure comprises a central sleeve fixedly arranged on the outer side of the single-pile foundation, at least three skirt pile sleeves which are circumferentially and uniformly distributed and correspond to the steel pipe piles in position are arranged on the outer side of the central sleeve, the skirt pile sleeves are fixedly arranged on the outer side of the steel pipe piles in a fixed mode, and the combined beam is fixed between the skirt pile sleeves and the central sleeve.
Furthermore, a central ring beam fixedly sleeved outside the single pile foundation and used for supporting the central sleeve is arranged below the central sleeve; and a skirt pile ring beam fixedly sleeved outside the steel pipe pile and used for supporting the skirt pile sleeve is arranged below the skirt pile sleeve.
Further, the central sleeve is connected with the single pile foundation, the skirt pile sleeve is connected with the steel pipe pile through grouting; two ends of the combined beam are respectively connected with the central sleeve and the skirt pile sleeve in a welding manner; the central ring beam is connected with the single-pile foundation, the skirt pile ring beam is connected with the steel pipe pile through welding.
Furthermore, the combined beam adopts a beam system structure formed by combining a single section steel, a single steel pipe, a plurality of section steel, a plurality of steel pipes or a plurality of section steel and steel pipes.
Furthermore, the central ring beam and the skirt pile ring beam are of beam systems of single section steel, single steel pipe, a plurality of section steel combinations, a plurality of steel pipe combinations or a plurality of section steel and steel pipe combinations.
Further, the number of the steel pipe piles is 3-8.
Further, at least three steel-pipe piles are all parallel to the single pile foundation.
Furthermore, at least three steel pipe piles are distributed radially, and each steel pipe pile is obliquely arranged with the single pile foundation.
Compared with the prior art, the utility model discloses following effect has: the utility model has the advantages of simple design, it is reasonable, utilize single pile foundation to be three at least steel-pipe piles of center circumference equipartition, utilize the telescopic combination beam system structure of area to be connected steel-pipe pile and major diameter single pile with the grout form, thereby form firm overall structure, can improve the resistance to plucking of single pile foundation, the resistance to compression, the horizontal bearing capacity, horizontal rigidity, structural integrity is stable, not only can solve the pile sinking that marine wind power unit single pile foundation construction met with high-efficient economy, horizontal rigidity is not enough, pile sinking straightness is difficult to guarantee engineering problem such as, the suitability of marine wind power unit single pile foundation to complicated hydrogeological conditions has been improved, investment cost has been reduced simultaneously, and the universal applicability has extensive application prospect in ocean field.
Description of the drawings:
fig. 1 is a schematic front view of a first embodiment of the present invention;
fig. 2 is a schematic top view of a first embodiment of the present invention;
fig. 3 is a schematic front view of a second embodiment of the present invention;
fig. 4 is a schematic top view of a second embodiment of the present invention.
In the figure:
100-single pile foundation; 200-steel pipe piles; 210-a central sleeve; 220-skirt pile sleeve; 230-composite beam; 310-a central collar; 320-skirt pile girt.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The first embodiment is as follows: as shown in fig. 1-2, the reinforced pile foundation structure of the single pile foundation of the offshore wind turbine comprises a vertically arranged single pile foundation 100 of the offshore wind turbine, and four steel pipe piles 200 uniformly distributed around the circumference of the single pile foundation 100, wherein the four steel pipe piles are all parallel to the single pile foundation, the diameter of the steel pipe pile 200 is smaller than that of the single pile foundation 100 and is sunk into the seabed body, two layers of combined beam system structures are arranged between the four steel pipe piles 200 and the single pile foundation 100 at intervals from top to bottom, the composite girder system structure includes a center sleeve 210 fixedly installed at the outer side of the mono-pile foundation 100, the outer side of the central sleeve 210 is provided with four skirt pile sleeves 220 which are evenly distributed in the circumference and the positions of which correspond to the positions of the steel pipe piles 200, the skirt pile sleeve 220 is fixedly sleeved outside the steel pipe pile 200, and a combination beam 230 is fixed between the skirt pile sleeve 220 and the central sleeve 210. Four steel pipe piles with smaller diameters are uniformly distributed on the circumference of the center of the single-pile foundation, and the small-diameter steel pipe piles and the large-diameter single piles are connected in a grouting mode through the combined beam system structure with the sleeves, so that a stable integral structure is formed, and the pulling resistance, the compression resistance, the horizontal bearing capacity, the horizontal rigidity and the overall stability of the structure of the single-pile foundation can be improved.
In this embodiment, a central ring beam 310 fixedly sleeved outside the single-pile foundation 100 and used for supporting the central sleeve 210 is disposed below the central sleeve 210, and by disposing the central ring beam, the overall rigidity and stability of the central sleeve and the single-pile foundation can be improved; the skirt pile ring beam 320 which is fixedly sleeved outside the steel pipe pile 200 and used for supporting the skirt pile sleeve 220 is arranged below the skirt pile sleeve 220, and the integral rigidity and stability of the skirt pile sleeve and the steel pipe pile can be improved by arranging the skirt pile ring beam.
In this embodiment, the central sleeve 210 and the single pile foundation 100, the skirt pile sleeve 220 and the steel pipe pile 200 are connected by grouting; the two ends of the combination beam 230 are respectively connected with the central sleeve 210 and the skirt pile sleeve 220 in a welding manner; the central ring beam 310 is connected with the single pile foundation 100, the skirt pile ring beam 320 is connected with the steel pipe pile 200 through welding.
In this embodiment, the composite beam 230 may adopt a beam system structure of a single section steel, a single steel pipe, a plurality of section steel combinations, a plurality of steel pipe combinations, or a plurality of section steel and steel pipe combinations.
In this embodiment, the central ring beam 310 and the skirt pile ring beam 320 may be a single section steel, a single steel pipe, a combination of a plurality of section steels, a combination of a plurality of steel pipes, or a beam system structure of a combination of a plurality of section steels and steel pipes.
In this embodiment, the number of the steel pipe piles is usually 3 to 8.
Example two: as shown in fig. 3 to 4, the difference between the present embodiment and the first embodiment is: at least three steel-pipe piles are distributed radially, and each steel-pipe pile is obliquely arranged with the single-pile foundation. It should be noted that the included angle between the steel pipe pile and the single pile foundation can be set or adjusted according to actual needs.
Through research and development of the offshore wind turbine single pile foundation reinforced pile foundation structure, the reliable connection between a plurality of steel pipe piles and a combined beam system structure and the offshore wind turbine single pile foundation is utilized, the compression resistance, the pulling resistance and the horizontal bearing capacity of the single pile foundation can be effectively improved, the horizontal height and the overall structure stability are improved, the offshore construction time is short, the construction precision is easy to control, the engineering problems that pile sinking is not in place, the horizontal rigidity is insufficient, the pile sinking verticality is difficult to guarantee and the like in the construction of the offshore wind turbine single pile foundation can be effectively and economically solved, the applicability of the offshore wind turbine single pile foundation to complex hydrogeological conditions is provided, the investment cost is reduced, the offshore wind turbine single pile foundation reinforced pile foundation structure has wide applicability, and has wide application prospects in the field of oceans.
In this embodiment, the specific construction method includes the following two cases:
A. if the single-pile foundation type adopted by the offshore wind turbine is judged to be difficult to meet the design requirements according to the preset structural design at the single-pile foundation design stage of the offshore wind turbine, the method comprises the following steps:
step SA 1: a pile sinking process is formulated according to the actual engineering geological condition and the construction capacity allocation condition; step SA 2: the pile sinking process can be divided into the following three pile sinking modes according to different pile sinking procedures,
step SA21, sinking the single pile foundation of the offshore wind turbine generator system, and uniformly sinking 3-8 steel pipe piles in the circumferential direction of the single pile foundation of the offshore wind turbine generator system by taking the single pile foundation of the offshore wind turbine generator system as a center;
step SA 22: firstly, positioning a theoretical central point coordinate, uniformly sinking piles along the circumferential direction of the theoretical central point coordinate to arrange 3-8 steel pipe piles by taking the theoretical central point coordinate as a center, then re-measuring an actual pile sinking positioning coordinate of the steel pipe piles, calculating an actual central point coordinate, and sinking the piles of the offshore wind turbine single-pile foundation at the position of the actual central point coordinate;
step SA 23: pile sinking sequence is not limited, pile sinking of the single pile foundation of the offshore wind turbine generator system and 3-8 steel pipe piles is alternately carried out, pile sinking coordinates are measured in real time, and the steel pipe piles are guaranteed to be uniformly distributed on the circumference with the single pile foundation of the offshore wind turbine generator system as the center;
step SA 3: prefabricating at least one layer of combined beam system structure on land according to the single pile foundation of the offshore wind turbine and the actual pile sinking positions of 3-8 steel pipe piles, wherein a central sleeve and a skirt pile sleeve of each layer of combined beam system structure are respectively welded with a combined beam;
step SA 4: respectively welding a central ring beam and a skirt pile ring beam on the single pile foundation of the offshore wind turbine generator system and the steel pipe piles according to actual pile sinking positions of the single pile foundation of the offshore wind turbine generator system and 3-8 steel pipe piles and according to the requirement of structural arrangement;
step SA 5: integrally hoisting a layer of combined beam system structure, and performing grouting construction to ensure that the single pile foundation of the offshore wind turbine generator system is reliably connected with the central sleeve, the steel pipe pile and the skirt pile sleeve, so as to finish offshore installation of the layer of combined beam system structure;
step SA 6: step SA4 and step SA5 are repeated, offshore installation of the residual layer combined beam system structure is completed in sequence, and installation of the offshore wind turbine single pile foundation reinforced pile foundation structure is completed;
B. if the single pile foundation of the offshore wind turbine generator is sunk but still does not meet the design requirement, the method comprises the following steps:
step SB 1: rechecking the construction condition of the single pile foundation of the sunk offshore wind turbine generator system, and performing necessary correction on the single pile foundation with overlarge verticality deviation;
step SB 2: uniformly sinking and arranging 3-8 steel pipe piles in the circumferential direction of a single pile foundation of an offshore wind turbine generator system;
step SB 3: prefabricating at least one layer of combined beam system structure on land according to the single pile foundation of the offshore wind turbine and the actual pile sinking positions of 3-8 steel pipe piles, wherein a central sleeve and a skirt pile sleeve of each layer of combined beam system structure are respectively welded with a combined beam;
step SB 4: respectively welding a central ring beam and a skirt pile ring beam on the single pile foundation of the offshore wind turbine generator system and the steel pipe piles according to actual pile sinking positions of the single pile foundation of the offshore wind turbine generator system and 3-8 steel pipe piles and according to the requirement of structural arrangement;
step SB 5: integrally hoisting a layer of combined beam system structure, and performing grouting construction to ensure that the single pile foundation of the offshore wind turbine generator system is reliably connected with the central sleeve, the steel pipe pile and the skirt pile sleeve, so as to finish offshore installation of the layer of combined beam system structure;
step SB 6: and repeating the steps SB4 and SB5, sequentially completing offshore installation of the residual layer combined beam system structure, and completing installation of the offshore wind turbine single pile foundation reinforced pile foundation structure.
The above is only the preferred embodiment of the present invention, and all the equivalent changes and modifications made according to the claims of the present invention should be covered by the present invention.
Claims (9)
1. The utility model provides an offshore wind turbine single pile foundation reinforcing pile foundation structure, includes offshore wind turbine single pile foundation, its characterized in that: the combined beam system structure comprises a single-pile foundation and is characterized by further comprising at least three steel pipe piles which are uniformly distributed around the single-pile foundation in a circumferential mode, wherein at least one layer of combined beam system structure is arranged between the at least three steel pipe piles and the single-pile foundation from top to bottom.
2. The offshore wind turbine unit single pile foundation reinforcing pile foundation structure of claim 1, wherein: the combined beam system structure comprises a central sleeve fixedly arranged on the outer side of the single-pile foundation, at least three skirt pile sleeves which are circumferentially and uniformly distributed and correspond to the steel pipe piles in position are arranged on the outer side of the central sleeve, the skirt pile sleeves are fixedly arranged on the outer side of the steel pipe piles, and a combined beam is fixed between the skirt pile sleeves and the central sleeve.
3. The offshore wind turbine unit single pile foundation reinforcing pile foundation structure of claim 2, characterized in that: a central ring beam fixedly sleeved outside the single pile foundation and used for supporting the central sleeve is arranged below the central sleeve; and a skirt pile ring beam fixedly sleeved outside the steel pipe pile and used for supporting the skirt pile sleeve is arranged below the skirt pile sleeve.
4. The offshore wind turbine unit single pile foundation reinforcing pile foundation structure of claim 3, characterized in that: the central sleeve is connected with the single-pile foundation, the skirt pile sleeve is connected with the steel pipe pile through grouting; two ends of the combined beam are respectively connected with the central sleeve and the skirt pile sleeve in a welding manner; the central ring beam is connected with the single-pile foundation, the skirt pile ring beam is connected with the steel pipe pile through welding.
5. The offshore wind turbine unit single pile foundation reinforcing pile foundation structure of claim 2, characterized in that: the combined beam adopts a beam system structure of single section steel, single steel pipe, a plurality of section steel combinations, a plurality of steel pipe combinations or a plurality of section steel and steel pipe combinations.
6. The offshore wind turbine unit single pile foundation reinforcing pile foundation structure of claim 3, characterized in that: the central ring beam and the skirt pile ring beam are of beam systems of single section steel, single steel pipe, a plurality of section steel combinations, a plurality of steel pipe combinations or a plurality of section steel and steel pipe combinations.
7. The offshore wind turbine unit single pile foundation reinforcing pile foundation structure of claim 1, wherein: the number of the steel pipe piles is 3-8.
8. The offshore wind turbine unit single pile foundation reinforcing pile foundation structure of claim 1, wherein: and at least three steel pipe piles are all parallel to the single pile foundation.
9. The offshore wind turbine unit single pile foundation reinforcing pile foundation structure of claim 1, wherein: at least three steel-pipe piles are distributed radially, and each steel-pipe pile is obliquely arranged with the single-pile foundation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920400049.4U CN209941726U (en) | 2019-03-27 | 2019-03-27 | Offshore wind turbine single pile foundation reinforced pile foundation structure |
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| CN201920400049.4U CN209941726U (en) | 2019-03-27 | 2019-03-27 | Offshore wind turbine single pile foundation reinforced pile foundation structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826225A (en) * | 2019-03-27 | 2019-05-31 | 福建省水利水电勘测设计研究院 | Single-pile foundation for offshore wind generation set reinforces piling strtucture and construction method |
| CN113818430A (en) * | 2021-10-30 | 2021-12-21 | 中铁广州工程局集团有限公司 | Construction method of geological cement mixing pile with water-rich layer and sludge |
-
2019
- 2019-03-27 CN CN201920400049.4U patent/CN209941726U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826225A (en) * | 2019-03-27 | 2019-05-31 | 福建省水利水电勘测设计研究院 | Single-pile foundation for offshore wind generation set reinforces piling strtucture and construction method |
| CN113818430A (en) * | 2021-10-30 | 2021-12-21 | 中铁广州工程局集团有限公司 | Construction method of geological cement mixing pile with water-rich layer and sludge |
| CN113818430B (en) * | 2021-10-30 | 2022-06-28 | 中铁广州工程局集团有限公司 | Construction method of geological cement mixing pile with water-rich layer and silt |
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Address after: No.158, Dongda Road, Fuzhou, Fujian 350000 Patentee after: Fujian Water Resources and Hydropower Survey, design and Research Institute Co.,Ltd. Address before: No.158, Dongda Road, Gulou District, Fuzhou City, Fujian Province 350000 Patentee before: FUJIAN PROVINCIAL INVESTIGATION DESIGN & Research Institute OF WATER CONSERVANCY AND HYDROPOWER |