CN212336069U - Deep sea wind power generation jacket type single pile composite structure - Google Patents
Deep sea wind power generation jacket type single pile composite structure Download PDFInfo
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- CN212336069U CN212336069U CN202021026490.XU CN202021026490U CN212336069U CN 212336069 U CN212336069 U CN 212336069U CN 202021026490 U CN202021026490 U CN 202021026490U CN 212336069 U CN212336069 U CN 212336069U
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Abstract
The utility model relates to a deep sea wind power generation jacket formula single pile composite construction. The technical scheme of the utility model is that: the utility model provides a deep sea wind power generation jacket formula single pile composite construction which characterized in that: the large-diameter steel pipe, the transition section, the jacket main body structure and the steel pipe pile are arranged; wherein the upper end of the large-diameter steel pipe is positioned above the top elevation of the wave action range of the service engineering field of the single-pile composite structure, and the lower end of the large-diameter steel pipe is positioned below the bottom elevation of the wave action range; the lower end of the large-diameter steel pipe is connected with a jacket main structure below the large-diameter steel pipe through a transition section, the lower end of the jacket main structure is connected with a plurality of steel sleeves, the jacket main structure is sleeved on a steel pipe pile through the steel sleeves, the steel pipe pile sinking pile is fixed on a seabed, and high-strength grouting materials are poured between the steel sleeves and the steel pipe pile to be connected. The utility model is suitable for a marine wind power generation trade, especially the foundation structure of being in service in the deep engineering field area that exceeds 30 meters.
Description
Technical Field
The utility model relates to a deep sea wind power generation jacket formula single pile composite construction. The foundation structure is suitable for the offshore wind power generation industry, in particular to a foundation structure which is used in an engineering field with the water depth of more than 30 meters.
Background
Under the background of the increasingly severe situation of the traditional fossil energy, all countries around the world aim at clean energy, namely wind energy, wherein the offshore wind energy is particularly important. China has been connected to the power grid and has the capacity of wind on the sea second to that of British and Germany, and is third in the world. The development of offshore wind energy resources gradually enters offshore wind power plants and deep and distant offshore wind power plants from intertidal and sub-tidal zone beach wind power plants. In the process of offshore and deep sea wind energy utilization, the jacket foundation structure is widely utilized due to the advantages of steel saving, low processing and manufacturing difficulty, mature construction process and the like.
The operation platform of the jacket foundation structure in the traditional marine oil industry is positioned above the sea level, and the pile legs extend to the sea bottom from the working point elevation at a certain slope. The structure has better economy in the depth of water within 30 meters, but with the further increase of depth of water, the projected area of jacket structure on the sea bed surface constantly increases, and the steel consumption of whole structure constantly increases. This results in an increase in the area occupied by the foundation and a further increase in the amount of steel used for the foundation structure if the offshore wind turbine generator system employs the conventional jacket structure for the offshore oil industry. The single-pile foundation has the advantages of simple structure, definite stress, no complex T, K, Y node and the like. However, as the depth of water increases, the diameter and wall thickness of the single pile foundation pile increase rapidly to maintain overall stiffness, and the amount of work and the cost of the foundation increase rapidly.
In the marine environment with severe service conditions of the foundation structure of the offshore wind turbine generator set, the alternate action of marine environment load is always borne in the service period, and the fatigue load becomes the main control load of the foundation structure of the offshore wind turbine generator set due to the cyclic action of the load generated by the running of the fan on the foundation structure. The traditional jacket foundation structure has more chords, inclined struts and nodes in the wave action range, and the node fatigue damage of the foundation structure becomes an important challenge of the foundation structure design under the action of wave load. Simultaneously, traditional jacket foundation structure bears great wave load effect, leads to its pile foundation side direction and vertical bearing capacity all to need to correspond the increase, and this just directly makes traditional jacket foundation structure pile footpath bigger, and the wall thickness is thicker, and the pile length is longer.
In view of the above, there is a need to provide a composite foundation that can overcome the problems of the jacket and the single-pile foundation by fully utilizing the advantages of the jacket and the single-pile foundation.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: aiming at the existing problems, the deep sea wind power generation jacket type single-pile composite structure is provided.
The utility model adopts the technical proposal that: the utility model provides a deep sea wind power generation jacket formula single pile composite construction which characterized in that: the large-diameter steel pipe, the transition section, the jacket main body structure and the steel pipe pile are arranged;
wherein the upper end of the large-diameter steel pipe is positioned above the top elevation of the wave action range of the service engineering field of the single-pile composite structure, and the lower end of the large-diameter steel pipe is positioned below the bottom elevation of the wave action range;
the lower end of the large-diameter steel pipe is connected with a jacket main structure below the large-diameter steel pipe through a transition section, the lower end of the jacket main structure is connected with a plurality of steel sleeves, the jacket main structure is sleeved on a steel pipe pile through the steel sleeves, the steel pipe pile sinking pile is fixed on a seabed, and high-strength grouting materials are poured between the steel sleeves and the steel pipe pile to be connected.
The transition section is provided with a plurality of transition steel pipes which are uniformly distributed on the periphery of the large-diameter steel pipe, one end of each transition steel pipe is connected to the pipe wall of the large-diameter steel pipe, and the other end of each transition steel pipe is obliquely downwards connected to the top of the main structure of the jacket.
The lower ends of the adjacent transition steel pipes are connected through inclined struts.
The jacket main structure is provided with a plurality of main leg columns which are uniformly distributed on the periphery of the large-diameter steel pipe, adjacent main leg columns are connected through a plurality of X-shaped inclined struts, and the distance between each main leg column and the axis of the large-diameter steel pipe is gradually increased from top to bottom.
The lower end of the main leg column is connected with one or more steel sleeves which are vertically arranged at the periphery of the main leg column through a connecting piece.
The construction method of the deep sea wind power generation jacket type single-pile composite structure is characterized by comprising the following steps of:
firstly, pile sinking operation of the steel pipe pile is carried out;
measuring the positioning of the steel pipe pile after the pile sinking of the steel pipe pile is finished, and hoisting an integral structure consisting of a jacket main body structure, a transition section and a large-diameter steel pipe to a position corresponding to the steel pipe pile below on the premise that the pile sinking precision meets the requirement of installing the jacket main body structure in the next step;
leveling operation is carried out in the lowering and installation process of the integral structure;
after the lowering of the integral structure is finished and the leveling is finished, the steel sleeve is correspondingly sleeved on the steel pipe pile, and high-strength grouting material is poured between the steel pipe pile and the steel sleeve to block.
Pile sinking operation of the steel pipe pile is carried out by adopting a pile sinking auxiliary positioning mechanism;
the pile sinking auxiliary positioning mechanism is provided with a plurality of positioning auxiliary sleeve pipe sets which correspond to the steel pipe piles to be constructed in a pile sinking mode one by one, the positioning auxiliary sleeve pipe sets are all installed and fixed on the positioning auxiliary support, the positioning auxiliary sleeve pipe sets are provided with two positioning auxiliary sleeve pipes which are coaxially arranged from top to bottom, and the inner diameter of each positioning auxiliary sleeve pipe is slightly larger than the outer diameter of each steel pipe pile.
The utility model has the advantages that: the utility model discloses a major diameter steel pipe combines with jacket major structure to form, has reduced the projected area of structure at the sea bed surface, has reduced with sea area, has reduced application and has used the sea expense, favourable marine environment protection.
The utility model discloses reduce foundation structure's node quantity, reduced welding work load to adopt the major diameter steel pipe to pass through wave action scope, the changeover portion structure is located below the wave action scope of marine wind power generation machine service sea area, is showing to have reduced wave load to foundation structure's node fatigue damage, has promoted the fatigue life of structure.
The utility model discloses reduced holistic steel volume, reduced foundation structure's investment, economic nature advantage is more obvious after the jacket basis is in service engineering field depth of water exceeds 30 meters.
The utility model discloses a pile group structure to shallow overburden engineering field area, can avoid the rock-socketed construction, promotes offshore construction operating efficiency for offshore wind farm construction progress.
Drawings
Fig. 1 is a schematic structural diagram of the prior art.
Fig. 2 is a schematic structural diagram of the embodiment.
Fig. 3 is a sectional view a-a of fig. 2.
Fig. 4 is a top view of an embodiment pile sinking auxiliary positioning mechanism.
Fig. 5 is a side view of an embodiment pile sinking aid positioning mechanism.
1. A large diameter steel pipe; 2. a transition steel pipe; 3. bracing; 4. a main leg column; 5. an X-shaped inclined strut; 6. steel casing; 7. a connecting member; 8. steel pipe piles; 9. positioning the auxiliary sleeve; 10. and (5) positioning an auxiliary support.
Detailed Description
The embodiment is a deep sea wind power generation jacket type single-pile composite structure which comprises a large-diameter steel pipe, a transition section, a jacket main body structure and a steel pipe pile, wherein the large-diameter steel pipe is connected with the steel pipe pile with a sunk pile below a sea bed surface through the transition section and the jacket main body structure.
In the embodiment, the size of the large-diameter steel pipe is 5.5-7 m, and the optimized size can be designed according to the diameter of a flange at the bottom section of the tower barrel set by a wind generating set manufacturer. The length of the large-diameter steel pipe is larger than the difference between the bottom elevation and the top elevation of the foundation in the wave action range of the single-pile composite structure service engineering field, the large-diameter steel pipe is vertically arranged, the upper end of the large-diameter steel pipe is located above the top elevation of the wave action range of the single-pile composite structure service engineering field, and the lower end of the large-diameter steel pipe is located below the bottom elevation of the wave action range, so that the transition section is located below the wave action range of the engineering field.
The jacket major structure has 4 evenly distributed main leg post all around in major diameter steel pipe below in this embodiment, and this main leg post from top to bottom its and major diameter steel pipe axis between the interval crescent, link to each other through two upper and lower X type bracing between the adjacent main leg post.
In this embodiment, the transition section includes 4 transition steel pipes around the large-diameter steel pipe arranged in one-to-one correspondence with the main leg columns on the main structure of the jacket below, and one section of equal-diameter steel pipe connected to the bottom end of the large-diameter steel pipe, one end of the diagonal brace of the transition section is connected to the wall of the equal-diameter steel pipe of the large-diameter steel pipe, and the other end of the diagonal brace is obliquely connected to the top end of the corresponding main leg column in the main structure of the jacket. The lower ends of the adjacent transition steel pipes are connected through a horizontal support.
In the embodiment, the lower end of the main leg column is connected with 2 steel sleeves through a connecting piece, the steel sleeves are vertically arranged and are positioned at the periphery of the main leg column, the inner diameter of each steel sleeve is slightly larger than the diameter of each steel pipe pile, and each connecting piece is provided with a vertical connecting plate which is arranged along the radial direction of each steel sleeve and is used for connecting the steel sleeves with the main leg column and a plurality of horizontal connecting plates which are horizontally arranged and are used for connecting the steel sleeves with the main leg column.
In the embodiment, the main structure of the jacket is sleeved on the steel pipe pile of which the sinking pile is fixed on the surface of the sea bed through the steel sleeve, and the outer surface of the steel pipe pile and the inner surface of the steel sleeve are connected and fixed in the range of the sleeved section through pouring high-strength grouting material.
Along with the increase of the fan load caused by the increase of the capacity of a single machine of the offshore wind driven generator, the number of the steel pipe piles and the number of the steel sleeves on the main leg column can be increased along with the increase of the fan load. In the engineering field area of the shallow covering layer, under the condition that the bearing capacity of the pile foundation is calculated to meet the requirements, the length of the steel pipe pile can be reduced by increasing the number of the steel pipe piles and the number of the steel sleeves, and rock-socketed construction operation is avoided.
After the number of the steel pipe piles, the number of the X-shaped inclined struts on the main structure of the jacket and the diameter of the large-diameter steel pipe are designed according to the characteristics of the offshore wind generating set, the marine environmental conditions of a service field and the engineering geological conditions, the steel pipe piles are rolled, welded, sand-blasted and coated in the construction base, the whole steel pipe piles are manufactured, the main structure of the jacket, the transition section, the large-diameter steel pipe and the steel sleeve are respectively processed, manufactured and molded, and the overall assembly in the construction base is finished, so that the integral mechanism is formed.
The construction method of the embodiment is as follows:
the method comprises the following steps that pile sinking operation of the steel pipe pile is firstly carried out during offshore construction, and pile sinking construction is assisted and positioned by a pile sinking auxiliary positioning mechanism;
after the steel pipe pile is sunk, measuring the positioning of the steel pipe pile, and hoisting the integral structure consisting of the jacket main body structure, the transition section and the large-diameter steel pipe to the position corresponding to the steel pipe pile on the seabed on the steel sleeve pipe on the integral structure on the premise that the pile sinking precision meets the requirement of installing the jacket main body structure on the next step;
continuously carrying out leveling operation in the lowering and mounting process of the integral structure;
after the lowering of the jacket type single-pile composite foundation structure is finished and the leveling is finished, pouring high-strength grouting material for plugging between the steel pipe pile and the steel sleeve, wherein the grouting process is the same as that of the common underwater grouting process;
the subsequent offshore installation of the tower drum and the wind generating set is consistent with the offshore installation process of the traditional tower drum and the wind generating set.
The pile sinking auxiliary positioning mechanism in the implementation has a positioning auxiliary sleeve pipe set which corresponds to the steel pipe piles to be constructed in the pile sinking one-to-one mode, the positioning auxiliary sleeve pipe set is fixedly installed on a positioning auxiliary support, the positioning auxiliary sleeve pipe set is provided with two positioning auxiliary sleeve pipes which are coaxially arranged from top to bottom, and the inner diameter of each positioning auxiliary sleeve pipe is slightly larger than the outer diameter of each steel pipe pile.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a deep sea wind power generation jacket formula single pile composite construction which characterized in that: the large-diameter steel pipe, the transition section, the jacket main body structure and the steel pipe pile are arranged;
wherein the upper end of the large-diameter steel pipe is positioned above the top elevation of the wave action range of the service engineering field of the single-pile composite structure, and the lower end of the large-diameter steel pipe is positioned below the bottom elevation of the wave action range;
the lower end of the large-diameter steel pipe is connected with a jacket main structure below the large-diameter steel pipe through a transition section, the lower end of the jacket main structure is connected with a plurality of steel sleeves, the jacket main structure is sleeved on a steel pipe pile through the steel sleeves, the steel pipe pile sinking pile is fixed on a seabed, and high-strength grouting materials are poured between the steel sleeves and the steel pipe pile to be connected.
2. The deep-sea wind power generation jacket type mono-pile composite structure according to claim 1, wherein: the transition section is provided with a plurality of transition steel pipes which are uniformly distributed on the periphery of the large-diameter steel pipe, one end of each transition steel pipe is connected to the pipe wall of the large-diameter steel pipe, and the other end of each transition steel pipe is obliquely downwards connected to the top of the main structure of the jacket.
3. The deep sea wind power generation jacket type single pile composite structure according to claim 2, characterized in that: the lower ends of the adjacent transition steel pipes are connected through a horizontal support.
4. The deep-sea wind power generation jacket type mono-pile composite structure according to claim 1, wherein: the jacket main structure is provided with a plurality of main leg columns which are uniformly distributed on the periphery of the large-diameter steel pipe, adjacent main leg columns are connected through a plurality of X-shaped inclined struts, and the distance between each main leg column and the axis of the large-diameter steel pipe is gradually increased from top to bottom.
5. The deep-sea wind power generation jacket-type single-pile composite structure according to claim 4, wherein: the lower end of the main leg column is connected with one or more steel sleeves which are vertically arranged at the periphery of the main leg column through a connecting piece.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021026490.XU CN212336069U (en) | 2020-06-05 | 2020-06-05 | Deep sea wind power generation jacket type single pile composite structure |
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| CN202021026490.XU CN212336069U (en) | 2020-06-05 | 2020-06-05 | Deep sea wind power generation jacket type single pile composite structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111549813A (en) * | 2020-06-05 | 2020-08-18 | 中国电建集团华东勘测设计研究院有限公司 | Deep sea wind power generation jacket type single-pile composite structure and construction method thereof |
| JP7241855B1 (en) | 2021-12-27 | 2023-03-17 | 日鉄エンジニアリング株式会社 | Joining member, jacket structure and offshore wind turbine |
| JP7337235B1 (en) | 2022-07-07 | 2023-09-01 | 日鉄エンジニアリング株式会社 | jacket structure |
-
2020
- 2020-06-05 CN CN202021026490.XU patent/CN212336069U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111549813A (en) * | 2020-06-05 | 2020-08-18 | 中国电建集团华东勘测设计研究院有限公司 | Deep sea wind power generation jacket type single-pile composite structure and construction method thereof |
| JP7241855B1 (en) | 2021-12-27 | 2023-03-17 | 日鉄エンジニアリング株式会社 | Joining member, jacket structure and offshore wind turbine |
| JP2023097191A (en) * | 2021-12-27 | 2023-07-07 | 日鉄エンジニアリング株式会社 | Joint member, jacket structure, and offshore wind turbine |
| JP7337235B1 (en) | 2022-07-07 | 2023-09-01 | 日鉄エンジニアリング株式会社 | jacket structure |
| JP2024008026A (en) * | 2022-07-07 | 2024-01-19 | 日鉄エンジニアリング株式会社 | jacket structure |
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