CN210857255U - Reinforced composite single-pile foundation for offshore wind turbine generator system - Google Patents
Reinforced composite single-pile foundation for offshore wind turbine generator system Download PDFInfo
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- CN210857255U CN210857255U CN201921099318.4U CN201921099318U CN210857255U CN 210857255 U CN210857255 U CN 210857255U CN 201921099318 U CN201921099318 U CN 201921099318U CN 210857255 U CN210857255 U CN 210857255U
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Abstract
The utility model relates to an offshore wind power unit strengthens combined type single pile basis, single pile basis include single pile basis body, adopt hollow steel-pipe pile structure, constitute by soil body insertion section and soil body section that exposes, the pot head is equipped with hollow steel round platform on the interface of two sections, hollow steel round platform comprises steel round platform frame and peripheral curb plate, the upper portion tip diameter of hollow steel round platform is greater than the external diameter of single pile basis body; gravel is filled between the hollow steel round platform and the outer side of the corresponding part of the single-pile foundation body to form a local reinforcing structure. The single-pile foundation combines the advantages of the single-pile foundation and the gravity type foundation, and the circular truncated cone filled with gravels is used for reinforcing the traditional single pile, so that the integral bearing capacity of the foundation is improved; by utilizing the section characteristics of the circular truncated cone, the impact of water flow can be effectively dispersed, the formation of washing pits and brushing at the bottom of a pier is avoided, and the pile foundation is reinforced.
Description
Technical Field
The utility model belongs to the technical field of the pile foundation protection, a pile foundation anti-scouring technology is related to, concretely relates to offshore wind turbine generator system strengthens combined type single pile basis.
Background
Wind energy is a green and environment-friendly new energy and is increasingly widely applied. The mining technology of land wind energy is relatively mature, but is limited by factors such as land, power transmission equipment and the like, the mining of the land wind energy is close to saturation, and offshore wind energy gradually becomes the focus of attention nowadays. The wind energy reserves in coastal areas of China are rich, offshore energy is an important strategic resource, and offshore wind energy development is necessary. The offshore wind turbine is necessary equipment for developing offshore wind energy, wherein the foundation part of the offshore wind turbine accounts for 20% -40% of the total construction cost of a project, and therefore, the development of a safe and economic offshore wind turbine foundation is an important step for promoting the development of the offshore wind power industry. Traditional offshore wind turbine foundations comprise single-pile foundations, gravity foundations and the like, and account for the highest proportion in the built offshore wind turbines, however, the traditional offshore wind turbines are influenced by applicable water depth and cannot be well applied to new-generation large-capacity wind turbines, and the development of novel wind turbine foundations is a key problem of research. The composite offshore wind turbine foundation integrates the advantages of the traditional foundation form, improves the existing technology, has the characteristics of low manufacturing cost, convenient construction, safety and reliability, and is expected to be widely applied to the offshore wind energy industry.
Through the search of the prior art, the technical scheme similar to the patent is not searched.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's weak point, provide an offshore wind turbine system and strengthen combined type single pile basis, this single pile basis cost is low, be convenient for construct, can be applicable to in deeper sea area and more severe marine environment condition, can reduce or prevent the local of basis and erode to can play the reinforcing effect to the pile foundation.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides an offshore wind turbine generator system strengthens combined type single pile basis which characterized in that: the single-pile foundation comprises a single-pile foundation body, wherein the single-pile foundation body is of a hollow steel pipe pile structure, the single-pile foundation body is composed of a soil body inserting section extending into the lower part of a seabed and a soil body exposing section exposing out of the upper part of the seabed, a hollow steel round table is sleeved on the interface of the soil body inserting section and the soil body exposing section and composed of a steel round table frame and peripheral side plates, and the diameter of the small end of the upper part of the hollow steel round table is larger than the outer diameter of the single-pile foundation body; gravel is filled between the hollow steel round platform and the outer side of the corresponding part of the single-pile foundation body to form a local reinforcing structure.
And, the hollow steel round platform adopts whole welded structure, the hollow steel round platform is through being the crossbeam of radial arrangement and the single pile basis body fixed connection along the circumferencial direction.
And the number of the beams in each layer is 3-8.
And the hollow steel round platform is formed by two split half rings at two ends through a buckling and locking connection structure, and the hollow steel round platform is sleeved on the periphery of the single-pile foundation body in a non-contact mode.
The utility model has the advantages and positive effect:
1. the utility model discloses single pile foundation has combined the advantage on single pile foundation and gravity type basis, utilizes the round platform of packing gravel to consolidate traditional single pile, has improved the whole bearing capacity on basis.
2. The utility model discloses the side characteristic of round platform is utilized on single pile basis, can provide extra vertical restriction for inside gravel, restricts its relative slip, improves basic wholeness to the basis bearing capacity has been improved.
3. The utility model discloses the cross-sectional characteristic of round platform is utilized on single pile basis, can effectively disperse the impact of rivers, avoids scouring the formation of brushing at the bottom of hole, the pier, plays the reinforcing effect to the pile foundation.
4. The utility model discloses the cost can be effectively saved on the single pile basis, utilizes hollow steel round platform to consolidate the single pile basis to utilize the gravel material packing round platform frame that the cost is low, can effectively solve the problem of infinitely increasing the single pile diameter in order to provide higher bearing capacity under deep sea or severe sea condition, thereby saved steel, the cost is reduced has fine economic benefits.
Drawings
Fig. 1 is a first structural schematic diagram of the single pile foundation of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a second structural schematic diagram of the single pile foundation of the present invention;
fig. 4 is a top view of fig. 3.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments, which are illustrative, not restrictive, and the scope of the invention should not be limited thereto.
The utility model provides an offshore wind power generation unit strengthens combined type single pile basis, this kind of novel single pile basis is the combination on traditional single pile basis and gravity type basis, under the prerequisite of traditional single pile basis installation, lays a hollow steel round platform in seabed soil surface department, arranges gravel material 4 in the round platform afterwards, considers discrete piling material characteristic, consolidates single pile basis, improves holistic bearing characteristic. In addition to the dead load provided by the superstructure, offshore wind turbines are also subjected to lateral loads due to wind, waves and currents, and overturning instability of the wind turbine is a design focus. The round platform foundation provides extra anti-overturning moment for the traditional single pile, and simultaneously reinforces the foundation soil body, and the gravel buried in the seabed by self weight provides friction force and passive soil pressure acting on the buried part for the whole structure, thereby effectively balancing partial external transverse load.
This offshore wind power generation unit strengthens combined type single pile basis mainly comprises single pile basis body 1 and hollow steel round platform 2, and single pile basis body adopts the hollow steel-pipe pile of major diameter, and the steel round platform comprises steel round platform frame and peripheral curb plate, and connected mode between them divide into fixed connection and movable formula cover and establishes the connection:
1) the hollow steel round platform is in an integral welding type structure and is welded with the single-pile foundation body through the cross beams 3 arranged along the circumference, relative displacement does not exist between the hollow steel round platform and the single-pile foundation body in the working process, 3-8 cross beams are arranged along the circumference, and 1-2 layers are arranged vertically according to the relative diameter ratio of the round platform and the tubular pile and the height of the round platform.
2) The hollow steel round platform is connected by two semi-ring split bodies 2-1 through a buckling lock 6 at two ends by adopting a movable sleeving connection mode, and is arranged on a seabed after the single-pile foundation body is installed and is not in direct contact with the single-pile foundation, as shown in figures 3 and 4.
Under the condition of adopting the fixed connection mode, the construction method of the offshore wind turbine generator system reinforced composite single-pile foundation comprises the following construction steps:
s1, constructing a single-pile foundation on land, specifically:
a. selecting a hollow steel pipe pile with a set diameter and a set length as a single pile foundation body, and welding a steel plate and a steel bar to manufacture a hollow steel round platform;
b. sleeving the hollow steel round platform at a set position of the single-pile foundation body, enabling the hollow steel round platform to be coaxial with the single-pile foundation body, and welding a cross beam between the hollow steel round platform and the single-pile foundation body to form a single-pile foundation;
s2, hoisting the pile foundation, and piling to a preset depth by adopting the existing single-pile foundation piling mode; the lower end of the hollow steel round platform is in close contact with the seabed 5, the inclination angle of the foundation needs to be closely monitored in the piling process, the level is strictly controlled, and the adopted preferred mode is as follows: before the single pile foundation is hoisted, a plurality of inclinometers are distributed at the upper end of the hollow steel round platform along the circumferential direction and are connected with display equipment arranged on a piling construction platform through data transmission lines. The inclination condition of the foundation can be obtained in time through the display equipment so as to adjust the piling action point and adjust and control the single-pile foundation to be in a horizontal state.
S3, throwing gravels into the hollow steel round platform after the single-pile foundation is installed, and stacking the gravels layer by layer in the hollow steel round platform until the inner cavity of the hollow steel round platform is filled.
Under the condition of adopting the movable sleeve connection mode, the construction method of the offshore wind turbine unit reinforced composite single-pile foundation comprises the following construction steps:
s1, selecting a hollow steel pipe pile with a set diameter and a set length as a single pile foundation body, welding and manufacturing two half-ring split bodies forming a hollow steel round platform by using a steel plate and a steel bar, respectively installing two parts of a lock catch at the corresponding ends of the two half-ring split bodies, and welding the lock catch by using stainless steel;
s2, hoisting the single-pile foundation body, and piling to a preset depth by adopting a traditional single-pile foundation piling mode; the inclination angle of the foundation needs to be closely monitored during the piling process, the level is strictly controlled, and the preferable modes which can be adopted are as follows: before the pile foundation is lifted, a mounting platform is fixed on the periphery of the single-pile foundation body, a plurality of inclinometers are arranged on the mounting platform along the circumferential direction, and the inclinometers are connected with display equipment arranged on the pile driving construction platform through data transmission lines. The inclination condition of the foundation can be obtained in time through the display equipment so as to adjust the pile driving action point and adjust and control the single-pile foundation to be in a horizontal state;
s3, after the single-pile foundation body is installed, enclosing the two split semi-rings outside the single-pile foundation body underwater, and buckling locks at two ends to form a hollow steel round platform so that the hollow steel round platform is in contact with the seabed;
s3, throwing gravels into the hollow steel round platform after the hollow steel round platform is installed in place, and piling the gravels layer by layer in the hollow steel round platform until the inner cavity of the hollow steel round platform is filled. In the case that the hollow steel round table is large in diameter relative to the mono-pile foundation body, an additional ring can be placed inside the hollow steel round table before gravel is thrown in S3, and stability is provided by limiting relative sliding of the gravel inside.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims, and therefore, the scope of the present invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (4)
1. The utility model provides an offshore wind turbine generator system strengthens combined type single pile basis which characterized in that: the single-pile foundation comprises a single-pile foundation body, wherein the single-pile foundation body is of a hollow steel pipe pile structure, the single-pile foundation body is composed of a soil body inserting section extending into the lower part of a seabed and a soil body exposing section exposing out of the upper part of the seabed, a hollow steel round table is sleeved on a decomposition surface of the soil body inserting section and the soil body exposing section and composed of a steel round table frame and peripheral side plates, and the diameter of the small end of the upper part of the hollow steel round table is larger than the outer diameter of the single-pile foundation body; gravel is filled between the hollow steel round platform and the outer side of the corresponding part of the single-pile foundation body to form a local reinforcing structure.
2. The offshore wind turbine unit reinforced composite single-pile foundation of claim 1, wherein: the hollow steel round platform adopts the integral welding formula structure, the hollow steel round platform is through being radial crossbeam and the single pile basis body fixed connection who arranges along the circumferencial direction.
3. The offshore wind turbine unit reinforced composite single-pile foundation of claim 2, wherein: the number of the beams in one layer or two layers arranged up and down is 3-8.
4. The offshore wind turbine unit reinforced composite single-pile foundation of claim 1, wherein: the hollow steel round platform is formed by two split half rings which are connected through a buckle lock at two ends, and the hollow steel round platform is sleeved on the periphery of the hollow steel round platform frame in a non-contact mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921099318.4U CN210857255U (en) | 2019-07-15 | 2019-07-15 | Reinforced composite single-pile foundation for offshore wind turbine generator system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921099318.4U CN210857255U (en) | 2019-07-15 | 2019-07-15 | Reinforced composite single-pile foundation for offshore wind turbine generator system |
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| CN210857255U true CN210857255U (en) | 2020-06-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110397062A (en) * | 2019-07-15 | 2019-11-01 | 河北工业大学 | A kind of offshore wind farm unit reinforces combined type single-pile foundation and construction method |
| CN113684851A (en) * | 2021-01-21 | 2021-11-23 | 上海勘测设计研究院有限公司 | Foundation construction method of gravity type foundation structure |
| CN114991221A (en) * | 2022-04-22 | 2022-09-02 | 华能灌云清洁能源发电有限责任公司 | Novel stone throwing shaft collar protective structure's offshore wind power pile foundation |
-
2019
- 2019-07-15 CN CN201921099318.4U patent/CN210857255U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110397062A (en) * | 2019-07-15 | 2019-11-01 | 河北工业大学 | A kind of offshore wind farm unit reinforces combined type single-pile foundation and construction method |
| CN113684851A (en) * | 2021-01-21 | 2021-11-23 | 上海勘测设计研究院有限公司 | Foundation construction method of gravity type foundation structure |
| CN114991221A (en) * | 2022-04-22 | 2022-09-02 | 华能灌云清洁能源发电有限责任公司 | Novel stone throwing shaft collar protective structure's offshore wind power pile foundation |
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