CN211816382U - Offshore wind power hollow interlayer concrete filled steel tube single pile foundation structure - Google Patents
Offshore wind power hollow interlayer concrete filled steel tube single pile foundation structure Download PDFInfo
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- CN211816382U CN211816382U CN201922284263.0U CN201922284263U CN211816382U CN 211816382 U CN211816382 U CN 211816382U CN 201922284263 U CN201922284263 U CN 201922284263U CN 211816382 U CN211816382 U CN 211816382U
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Abstract
The utility model relates to a marine wind power hollow interlayer steel pipe concrete single pile foundation structure, this single pile foundation, including three sections prefabricated hollow interlayer steel pipe concrete, respectively for upper segment prefabricated hollow interlayer steel pipe concrete, middle segment prefabricated hollow interlayer steel pipe concrete and hypomere prefabricated hollow interlayer steel pipe concrete, upper segment prefabricated hollow interlayer steel pipe concrete lower extreme and middle segment prefabricated hollow interlayer steel pipe concrete upper end fixed connection, middle segment prefabricated hollow interlayer steel pipe concrete lower extreme and hypomere prefabricated hollow interlayer steel pipe concrete upper end fixed connection; the three sections of prefabricated hollow interlayer steel pipe concrete comprise outer steel pipes, inner steel pipes and concrete interlayers, and the concrete interlayers are filled between the outer steel pipes and the inner steel pipes. The utility model discloses can improve the horizontal bearing capacity of single pile, can reduce the stake footpath under the condition that provides the same horizontal rigidity with ordinary steel-pipe pile, satisfy current pile sinking equipment and driller's rock-socketed equipment to the requirement in stake footpath, can reduce the steel quantity simultaneously by a wide margin, economic nature is good.
Description
Technical Field
The utility model relates to an offshore wind power foundation structure especially relates to an offshore wind power cavity intermediate layer steel pipe concrete single pile foundation structure.
Background
At present, after years of groping and engineering practice of offshore wind farms, offshore wind power foundations which are successfully applied comprise single-pile foundations, high-pile cap foundations, jacket foundations, gravity foundations and composite cylinder foundations. The single-pile foundation has the advantages of simple structure, clear stress, convenience in construction, low cost and the like, and more than 70% of European fan foundations adopt the foundation. The traditional single pile foundation is a steel pipe pile, the pile diameter is generally 4-8 m, and the wall thickness is about 1% of the pile diameter. The design of the single-pile foundation is usually controlled by horizontal deformation and frequency, and the rigidity is a main factor for restricting the single-pile foundation. Due to the rapid development of the offshore wind power industry, a plurality of large-capacity units with the power of more than 6MW are successfully researched and developed and are popularized in a large scale, if a traditional single-pile foundation is adopted, the pile diameter and the wall thickness need to be obviously increased in order to increase the rigidity, the pile diameter can reach 10m or more, the steel consumption is greatly increased, the cost of the fan foundation is obviously increased, and the existing piling equipment for single piles with the super-large diameter is also lacked. Therefore, a new single-pile foundation structure capable of effectively reducing the development cost of wind power needs to be provided to solve the above problems.
Due to the rapid development of the offshore wind power industry, a plurality of large-capacity units with the power of more than 6MW are successfully researched and developed and are popularized in a large scale, if a traditional single-pile foundation is adopted, the pile diameter and the wall thickness need to be obviously increased in order to increase the rigidity, the pile diameter can reach 10m or more, the steel consumption is greatly increased, the cost of the fan foundation is obviously increased, and the existing piling equipment for single piles with the super-large diameter is also lacked. Therefore, a new single-pile foundation structure capable of effectively reducing the development cost of wind power needs to be provided to solve the above problems.
SUMMERY OF THE UTILITY MODEL
For solving above problem, the utility model provides a marine wind power cavity intermediate layer steel pipe concrete single pile foundation structure can improve the horizontal bearing performance of single pile, satisfies current pile sinking equipment and driller's rock-socketed equipment to the requirement in stake footpath, can reduce the steel quantity simultaneously by a wide margin.
The utility model adopts the technical proposal that: the utility model provides an offshore wind power cavity intermediate layer steel pipe concrete single pile foundation structure which characterized in that: the prefabricated hollow sandwich concrete-filled steel tube comprises three sections of prefabricated hollow sandwich concrete-filled steel tube, namely, prefabricated hollow sandwich concrete-filled steel tube at the upper section, prefabricated hollow sandwich concrete-filled steel tube at the middle section and prefabricated hollow sandwich concrete-filled steel tube at the lower section, wherein the lower end of the prefabricated hollow sandwich concrete-filled steel tube at the upper section is fixedly connected with the upper end of the prefabricated hollow sandwich concrete-filled steel tube at the middle section, and the lower end of the prefabricated hollow sandwich concrete-filled steel tube at the middle section is fixedly connected with the upper end of the; the three sections of prefabricated hollow interlayer steel pipe concrete comprise outer steel pipes, inner steel pipes and concrete interlayers, and the concrete interlayers are filled between the outer steel pipes and the inner steel pipes.
Preferably, a prestressed anchor rod is arranged in the concrete interlayer.
Preferably, the connecting part of the inner steel pipe and the concrete interlayer and the connecting part of the outer steel pipe and the concrete interlayer are provided with shear bolts.
Preferably, the upper prefabricated hollow sandwich layer steel pipe concrete and the lower prefabricated hollow sandwich layer steel pipe concrete are equal-diameter sections, and the diameter of the upper prefabricated hollow sandwich layer steel pipe concrete is smaller than that of the lower prefabricated hollow sandwich layer steel pipe concrete; the middle section prefabricated hollow interlayer concrete filled steel tube is a variable-diameter section, the diameter of the upper end of the middle section prefabricated hollow interlayer concrete filled steel tube is equal to that of the upper section prefabricated hollow interlayer concrete filled steel tube, and the diameter of the lower end of the middle section prefabricated hollow interlayer concrete filled steel tube is equal to that of the lower section prefabricated hollow interlayer concrete filled steel tube.
Preferably, the lower end of the upper prefabricated hollow sandwich layer steel pipe concrete, the upper end of the middle prefabricated hollow sandwich layer steel pipe concrete, the lower end of the middle prefabricated hollow sandwich layer steel pipe concrete and the upper end of the lower prefabricated hollow sandwich layer steel pipe concrete are fixedly connected through flanges and high-strength bolts.
Preferably, the diameter of the outer steel pipe is 7-7.8 m, the thickness of the concrete interlayer is 200-300 mm, and the wall thickness of the inner steel pipe and the wall thickness of the outer steel pipe are both 20-30 mm.
A construction method of a hollow sandwich steel pipe concrete single pile foundation structure for offshore wind power comprises the following steps:
(1) prefabricating three sections of hollow sandwich steel pipe concrete, and stretching each section of hollow sandwich steel pipe concrete through a prestressed anchor rod;
(2) connecting the three sections of hollow sandwich steel pipe concrete by using flanges and high-strength bolts to form a complete offshore wind power single pile foundation;
(3) transporting the prefabricated single-pile foundation to a specified sea area, and completing hoisting and positioning;
(4) directly driving the single-pile foundation to a designed elevation under the thick geological condition of the covering layer; under the geological condition of bedrock buried depth, firstly, drilling to the elevation of the pile bottom, and then embedding the single pile foundation into the bedrock in an 'implantation' mode.
The utility model discloses the beneficial effect who gains is: the utility model discloses can improve the horizontal bearing capacity of single pile, can reduce the stake footpath under the condition that provides the same horizontal rigidity with ordinary steel-pipe pile, satisfy current pile sinking equipment and driller's rock-socketed equipment to the requirement in stake footpath, can reduce the steel quantity simultaneously by a wide margin, economic nature is good, is favorable to utilizing widely.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the connection between three sections of hollow sandwich concrete-filled steel tubes;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
reference numerals: 1. an outer steel tube; 2. an inner steel tube; 3. a concrete interlayer; 4. a pre-stressed anchor rod; 5. a shear bolt; 6. a connecting flange; 7. a high-strength bolt; 10. prefabricating hollow sandwich steel pipe concrete on the upper section; 11. prefabricating hollow sandwich steel pipe concrete in the middle section; 12. and the lower section is prefabricated with hollow sandwich layer steel pipe concrete.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-3, the utility model discloses a marine wind power cavity intermediate layer steel pipe concrete single pile foundation structure, including the prefabricated cavity intermediate layer steel pipe concrete of three-section, be prefabricated cavity intermediate layer steel pipe concrete 10 of upper segment respectively, prefabricated cavity intermediate layer steel pipe concrete 11 of middle segment and prefabricated cavity intermediate layer steel pipe concrete 12 of hypomere, prefabricated cavity intermediate layer steel pipe concrete 10 lower extreme of upper segment and the prefabricated cavity intermediate layer steel pipe concrete 11 upper end fixed connection of middle segment, prefabricated cavity intermediate layer steel pipe concrete 11 lower extreme of middle segment and the prefabricated cavity intermediate layer steel pipe concrete 12 upper end fixed connection of hypomere form a complete marine wind power single pile basis. Referring to fig. 2, the three-section prefabricated hollow sandwich steel tube concrete comprises an outer steel tube 1, an inner steel tube 2 and a concrete sandwich 3, and the concrete sandwich 3 is filled between the outer steel tube 1 and the inner steel tube 2. The concrete interlayer 3 is internally provided with a prestressed anchor rod 4, and the prestressed anchor rod 4 applies prestress to the concrete 3.
The connecting part of the inner steel pipe 2 and the concrete interlayer 3 and the connecting part of the outer steel pipe 1 and the concrete interlayer 3 are provided with shear bolts 5 to increase the engaging force of concrete and steel. In the embodiment, the diameter of the outer steel tube 1 is 7-7.8 m, the thickness of the interlayer concrete 3 is 200-300 mm, the diameter of the inner steel tube 2 is determined according to the diameter of the outer steel tube 1 and the thickness of the interlayer concrete 3, and the wall thickness of the outer steel tube 1 and the wall thickness of the inner steel tube 2 are 20-30 mm.
In this embodiment, the upper prefabricated hollow sandwich concrete-filled steel tube 10 and the lower prefabricated hollow sandwich concrete-filled steel tube 12 are equal-diameter sections, and the diameter of the upper prefabricated hollow sandwich concrete-filled steel tube 10 is smaller than that of the lower prefabricated hollow sandwich concrete-filled steel tube 12; the middle-section prefabricated hollow interlayer steel pipe concrete 11 is a variable-diameter section (which is sequentially increased from top to bottom), the diameter of the upper end of the middle-section prefabricated hollow interlayer steel pipe concrete 11 is equal to that of the upper-section prefabricated hollow interlayer steel pipe concrete 11, and the diameter of the lower end of the middle-section prefabricated hollow interlayer steel pipe concrete is equal to that of the lower-section prefabricated hollow interlayer steel pipe concrete 12. Referring to fig. 3, the lower end of the upper prefabricated hollow sandwich layer concrete filled steel tube 10, the upper end of the middle prefabricated hollow sandwich layer concrete filled steel tube 11, the lower end of the middle prefabricated hollow sandwich layer concrete filled steel tube 11 and the upper end of the lower prefabricated hollow sandwich layer concrete filled steel tube 12 are fixedly connected through a flange 6 and a high-strength bolt 7.
The utility model discloses a construction method of marine wind power cavity intermediate layer steel pipe concrete single pile foundation structure, including following step:
(1) prefabricating three sections of hollow sandwich steel pipe concrete in a factory, and tensioning each section of hollow sandwich steel pipe concrete through a prestressed anchor rod 4;
(2) connecting the three sections of hollow sandwich steel pipe concrete by using a flange 6 and a high-strength bolt 7 in a factory to form a complete offshore wind power single pile foundation;
(3) transporting the prefabricated single-pile foundation to a specified sea area, and completing hoisting and positioning;
(4) directly driving the single pile foundation to a designed elevation by adopting a hammering method under the geological condition with a thicker covering layer; under the geological condition of shallow bedrock burial depth, a hole can be drilled to the elevation of the pile bottom, and then the single pile foundation is embedded into the bedrock in an 'implantation' mode.
The foregoing shows and describes the general principles and principal structural features of the invention. The present invention is not limited by the above-mentioned examples, and the present invention can be modified in various ways without departing from the spirit and scope of the present invention, and these modifications and improvements fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides an offshore wind power cavity intermediate layer steel pipe concrete single pile foundation structure which characterized in that: the prefabricated hollow sandwich concrete-filled steel tube comprises three sections of prefabricated hollow sandwich concrete-filled steel tube, namely, prefabricated hollow sandwich concrete-filled steel tube at the upper section, prefabricated hollow sandwich concrete-filled steel tube at the middle section and prefabricated hollow sandwich concrete-filled steel tube at the lower section, wherein the lower end of the prefabricated hollow sandwich concrete-filled steel tube at the upper section is fixedly connected with the upper end of the prefabricated hollow sandwich concrete-filled steel tube at the middle section, and the lower end of the prefabricated hollow sandwich concrete-filled steel tube at the middle section is fixedly connected with the upper end of the; the three sections of prefabricated hollow interlayer steel pipe concrete respectively comprise an outer steel pipe, an inner steel pipe and a concrete interlayer, and the concrete interlayer is filled in the offshore wind power hollow interlayer steel pipe concrete single-pile foundation structure between the outer steel pipe and the inner steel pipe; and a prestressed anchor rod is arranged in the concrete interlayer.
2. The offshore wind power hollow sandwich steel pipe concrete mono-pile foundation structure of claim 1, characterized in that: and the connecting part of the inner steel pipe and the concrete interlayer and the connecting part of the outer steel pipe and the concrete interlayer are provided with shear bolts.
3. The offshore wind power hollow sandwich steel pipe concrete mono-pile foundation structure of claim 1, characterized in that: the upper section of prefabricated hollow interlayer steel pipe concrete and the lower section of prefabricated hollow interlayer steel pipe concrete are equal-diameter sections, and the diameter of the upper section of prefabricated hollow interlayer steel pipe concrete is smaller than that of the lower section of prefabricated hollow interlayer steel pipe concrete; the middle section prefabricated hollow interlayer concrete filled steel tube is a variable-diameter section, the diameter of the upper end of the middle section prefabricated hollow interlayer concrete filled steel tube is equal to that of the upper section prefabricated hollow interlayer concrete filled steel tube, and the diameter of the lower end of the middle section prefabricated hollow interlayer concrete filled steel tube is equal to that of the lower section prefabricated hollow interlayer concrete filled steel tube.
4. The offshore wind power hollow sandwich steel pipe concrete mono-pile foundation structure of claim 1, characterized in that: the lower end of the upper-section prefabricated hollow interlayer steel pipe concrete, the upper end of the middle-section prefabricated hollow interlayer steel pipe concrete, the lower end of the middle-section prefabricated hollow interlayer steel pipe concrete and the upper end of the lower-section prefabricated hollow interlayer steel pipe concrete are fixedly connected through flanges and high-strength bolts.
5. The offshore wind power hollow sandwich steel pipe concrete mono-pile foundation structure of claim 1, characterized in that: the diameter of outer steel pipe is 7 ~ 7.8m, the thickness of concrete intermediate layer is 200 ~ 300mm, the wall thickness of interior steel pipe and outer steel pipe is 20 ~ 30 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922284263.0U CN211816382U (en) | 2019-12-18 | 2019-12-18 | Offshore wind power hollow interlayer concrete filled steel tube single pile foundation structure |
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| CN201922284263.0U CN211816382U (en) | 2019-12-18 | 2019-12-18 | Offshore wind power hollow interlayer concrete filled steel tube single pile foundation structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111236296A (en) * | 2019-12-18 | 2020-06-05 | 长江勘测规划设计研究有限责任公司 | Offshore wind power hollow interlayer concrete filled steel tube single pile foundation structure and construction method |
| CN114263274A (en) * | 2021-12-31 | 2022-04-01 | 福州大学 | Novel hollow sandwich concrete-filled steel tube member and connecting method thereof |
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2019
- 2019-12-18 CN CN201922284263.0U patent/CN211816382U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111236296A (en) * | 2019-12-18 | 2020-06-05 | 长江勘测规划设计研究有限责任公司 | Offshore wind power hollow interlayer concrete filled steel tube single pile foundation structure and construction method |
| CN114263274A (en) * | 2021-12-31 | 2022-04-01 | 福州大学 | Novel hollow sandwich concrete-filled steel tube member and connecting method thereof |
| CN114263274B (en) * | 2021-12-31 | 2023-09-22 | 福州大学 | Novel hollow interlayer steel pipe concrete member and connecting method thereof |
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