CN212003444U - Bucket foundation structure for offshore electrical platform - Google Patents
Bucket foundation structure for offshore electrical platform Download PDFInfo
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- CN212003444U CN212003444U CN202020579738.9U CN202020579738U CN212003444U CN 212003444 U CN212003444 U CN 212003444U CN 202020579738 U CN202020579738 U CN 202020579738U CN 212003444 U CN212003444 U CN 212003444U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The utility model relates to a bucket type foundation structure for offshore electric platform. The utility model aims at providing a simple structure, preparation convenience, safe and reliable's a bucket type foundation structure for marine electric platform to improve marine electric platform and build efficiency and reduce construction risk, cost. The technical scheme of the utility model is that: a bucket foundation structure for an offshore electrical platform, characterized in that: the device is provided with a jacket, the lower ends of pile legs of the jacket are connected with a double-wall barrel-shaped mechanism, an upper mounting platform is arranged at the top of the jacket, a level and a central control system are arranged on the upper mounting platform, and a hydraulic leveling mechanism is arranged between the upper mounting platform and the jacket; the double-wall barrel type mechanism is provided with a top cover, the upper end surface of the top cover is connected with the pile legs of the jacket, and the lower end surface of the top cover is coaxially connected with an inner barrel and an outer barrel. The utility model is suitable for a marine wind power field technical field.
Description
Technical Field
The utility model relates to a bucket type foundation structure for offshore electric platform. The method is suitable for the technical field of offshore wind power generation.
Background
In recent years, with the gradual saturation of onshore wind power resources, many countries around the world increasingly use the development and utilization of offshore wind power resources as an important direction for the development of wind power. With the continuous increase of the scale of the offshore wind farm, the distance from the offshore site to the offshore site and the increase of the water depth, the difficulty of power transmission and transformation of the offshore wind farm is rapidly increased, and the offshore electric platform is more and more emphasized as the core of power transmission and transformation of the offshore wind farm.
In order to ensure effective transmission of electric energy, electric platforms such as offshore booster stations or converter stations are usually arranged in offshore wind power plants to boost the voltage of the electric energy generated by wind power to 220kV or convert the electric energy into direct current, and then the direct current is transmitted to onshore substations through submarine cables.
As an electric energy collection center of an offshore wind farm, an offshore large-scale electric platform is a key facility for power transmission and transformation and is also a key for success or failure of the whole offshore wind farm. Taking an offshore booster station as an example, the booster station of the built offshore booster substation has various plane and vertical surface forms, the foundation has the forms of a single pile, a jacket and the like, the upper structure is generally a double-layer or multi-layer steel structure platform, the offshore booster substation is integrally hoisted to the offshore foundation after being assembled and formed by onshore construction and is fixedly connected with the offshore foundation, and part of the offshore booster substation is provided with a helicopter platform.
The single-pile structure comprises a single-pile foundation and a steel structure upper part module, wherein the single-pile foundation adopts a steel pipe pile, the diameter of the steel pipe pile is 4-7 m, the length of the pile is tens of meters, the steel pipe pile is driven into a seabed by a large pile sinking machine, the upper part of the pile is connected with an upper platform by a connecting section, the same treatment mode as that of a fan foundation is adopted, the connecting section is connected with the steel pipe pile by grouting, the connecting section is connected with the upper platform by a flange, and the connecting section also plays a leveling role; the jacket foundation is connected by 4 or more steel pipe piles and welded or grouted by the jacket.
The jacket foundation has strong applicability and is suitable for various water depths and geological conditions. The conventional jacket foundation offshore electrical platform construction process comprises the following steps: processing and manufacturing a steel structure → installing electrical equipment → sinking a jacket foundation → grouting construction → integrally hoisting an upper block of the offshore electrical platform → welding the upper block and the jacket and grouting.
At present, the offshore electrical platform foundation structure and the construction method of the jacket combined pile foundation have a plurality of problems: 1) the offshore construction window period is short; 2) the jacket foundation is more than 4 piles, so that the piling cost is high; 3) the offshore construction condition is poor, and the piling precision is not high; 4) the problem of difficult pile formation caused by shallow seabed covering layer and the like.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: aiming at the existing problems, the barrel-shaped foundation structure for the offshore electrical platform is simple in structure, convenient to manufacture, safe and reliable, so that the construction efficiency of the offshore electrical platform is improved, and the construction risk and cost are reduced.
The utility model adopts the technical proposal that: a bucket foundation structure for an offshore electrical platform, characterized in that: the device is provided with a jacket, the lower ends of pile legs of the jacket are connected with a double-wall barrel-shaped mechanism, an upper mounting platform is arranged at the top of the jacket, a level and a central control system are arranged on the upper mounting platform, and a hydraulic leveling mechanism is arranged between the upper mounting platform and the jacket;
the double-wall barrel-shaped mechanism is provided with a top cover, the upper end surface of the top cover is connected with the pile legs of the jacket, and the lower end surface of the top cover is coaxially connected with an inner barrel and an outer barrel;
a partition board is arranged at the upper part in the inner barrel, the inner part of the inner barrel is divided into an upper cavity and a lower cavity which are distributed up and down through the partition board, the lower cavity is divided into a plurality of cabins communicated with the lower end of the inner barrel through a cabin dividing board, a vacuum gauge is arranged in each cabin, and each cabin is communicated with the upper cavity through a single cabin control valve arranged on the partition board; the upper cavity of the inner barrel is communicated with a vacuum pump through a flow control valve and a water-gas pipeline.
The height-diameter ratio of the inner barrel is more than 1, and the height-diameter ratio of the outer barrel is less than 1.
The diameter of the inner barrel is 5m, and the height of the inner barrel is 10 m; the outer barrel is 10m in length and 4m in height.
The jacket is provided with a plurality of pile legs, and the pile legs are connected through horizontal struts and inclined struts.
The water and gas pipeline is arranged in the pile leg.
A construction method of the bucket type foundation structure for the offshore electric platform is characterized in that:
assembling the barrel-shaped foundation structure on land and debugging the barrel-shaped foundation structure, transporting the barrel-shaped foundation structure to a specified position of an offshore wind farm by using an installation ship or a barge, and hoisting the assembled structure by using an offshore floating crane to slowly put the assembled structure into water;
the barrel-shaped foundation structure gradually sinks under the action of self weight, and an inner barrel in the double-wall barrel-shaped mechanism and a seabed mud surface form a closed space;
after the self-weight sinking is finished, water vapor in the inner barrel is pumped through a water vapor pipeline and a vacuum pump, the barrel-shaped foundation structure can further sink under the action of pressure difference, and the outer barrel wall in the double-wall barrel-shaped mechanism is inserted into the mud surface of the seabed;
when a top cover in the double-wall barrel type mechanism is contacted with the mud surface of the seabed, the vacuum pump continues to pump negative pressure in the inner barrel to carry out pressurization and super-sinking treatment;
if uneven settlement occurs, the upper mounting platform is kept horizontal by adjusting the hydraulic adjusting mechanism.
In the negative pressure sinking process, a water-gas pipeline is used for extracting water gas in a cavity of an inner barrel, a flow control valve and a single-cabin control valve are used for controlling the extraction of the total water gas amount and the water gas amounts of different cabins, a vacuum gauge is used for monitoring the vacuum degrees of the different cabins, a level gauge is used for monitoring the levelness of an upper mounting platform in real time, and the levelness is fed back to a central control system;
the central control system collects real-time monitoring data of the vacuum gauge and the level gauge, and controls the penetration postures and inclinations of different double-wall barrel-shaped mechanisms by adjusting the single-cabin control valve and the flow control valve through analyzing and judging the negative pressure value, the inclination and the penetration speed of the double-wall barrel-shaped mechanisms, so that the barrel-shaped foundation structure is integrally and stably sunk.
The utility model has the advantages that: the utility model discloses at jacket lower extreme installation double-walled bucket type mechanism, increase the area of contact of top surface and the soil body, improve double-walled bucket type mechanism bearing capacity, improve the antidumping ability simultaneously.
The utility model adopts the measure of overload prepressing to reduce the settlement amount during the secondary loading aiming at the characteristics of the self weight and the secondary loading of the offshore electrical platform and avoiding the massive settlement caused by the secondary loading; aiming at the characteristics of large sedimentation amount and large deformation of the muddy soil on the surface layer of the seabed, a method of maintaining negative pressure for a long time is adopted to form artificial forced drainage consolidation so as to reduce the later deformation and sedimentation of the soil body.
The utility model discloses to sea bed surface unevenness, geology inhomogeneous and the back slope problem of double-walled bucket type mechanism installation that arouses, hydraulic pressure adjustment mechanism can carry out the leveling according to the spirit level, and upper portion mounting platform's installation face is the horizontally when guaranteeing the installation of marine electrical platform upper portion chunk.
Aiming at the characteristics of great self weight and small horizontal force of an offshore electrical platform, a measure of enlarging the root at the bottom of the jacket is adopted, so that the barrel-shaped foundation is only pressed and not pulled, the amplitude of the circulating load acting on the barrel-shaped foundation is reduced, and the uneven settlement in the operation period is reduced.
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 a double-walled barrel type mechanism in an embodiment.
Figure 4 is a schematic end view of the lower end of the leg in the embodiment.
In the figure: 1. an inner barrel; 2. an outer tub; 3. a top cover; 4. pile legs; 5. horizontally supporting; 6. bracing; 7. an upper mounting platform; 8. a deck plate; 9. a vacuum gauge; 10. a single compartment control valve; 11. a flow control valve; 12. a water and gas pipeline; 13. a partition plate; 14. a level gauge; 15. a central control system; 16. and a hydraulic adjusting mechanism.
Detailed Description
As shown in fig. 1 and 2, the present embodiment is a barrel type foundation structure for an offshore electrical platform, which has a jacket, an upper installation platform 7 and a double-wall barrel type mechanism, wherein the jacket has four spud legs 4 distributed at four corners, the spud legs 4 are connected with each other through horizontal braces 5 and inclined braces 6, the lower ends of the spud legs 4 are connected to the double-wall barrel type mechanism, and the upper ends of the jacket are connected with the upper installation platform 7 through a hydraulic leveling mechanism. In this example, the upper mounting platform 7 is provided with a central control system 15 and a level gauge 14, and the level gauge 14 is mounted on the upper mounting surface of the upper mounting platform 7 and is electrically connected to the central control system 15.
As shown in fig. 3, the double-walled barrel-shaped mechanism of the present embodiment has a top cover 3, the upper end surface of the top cover 3 is connected with the spud legs 4, the lower end surface of the top cover 3 is connected with an inner barrel 1 and an outer barrel 2 coaxially sleeved outside the inner barrel 1, the inner barrel 1 has a diameter of 5m and a height of 10m, and the outer barrel 2 has a diameter of 10m and a height of 4 m. In the embodiment, a partition plate 13 is arranged at the upper part in an inner barrel 1, the inner part of the inner barrel is divided into an upper cavity and a lower cavity which are distributed up and down through the partition plate 13, the lower cavity is divided into a plurality of cabins through a cabin dividing plate 8, and the lower ends of the cabins are communicated with lower ports of the inner barrel 1.
In this embodiment, a vacuum gauge 9 is provided in each chamber of the inner barrel 1, and the chambers are communicated with the upper chamber of the inner barrel 1 through a single chamber control valve 10 provided on a partition plate 13. The upper chamber of the inner barrel 1 is communicated with a vacuum pump through a flow control valve 11 and a water-gas pipeline 12, wherein the flow control valve 11 and the water-gas pipeline 12 are arranged in the spud leg 4 (see figure 4). The vacuum gauge 9, the single cabin control valve 10, the flow control valve 11 and the vacuum pump are all connected with a central control system 15 through circuits.
The specific construction method of the embodiment is as follows:
assembling the barrel-shaped foundation structure on land and debugging the barrel-shaped foundation structure, transporting the barrel-shaped foundation structure to a specified position of an offshore wind farm by using an installation ship or a barge, and hoisting the assembled structure by using an offshore floating crane to slowly put the assembled structure into water;
the barrel-shaped foundation structure gradually sinks under the action of self weight, and an inner barrel 1 in the double-wall barrel-shaped mechanism and a seabed mud surface form a closed space;
after the self-weight sinking is finished, water vapor in the inner barrel 1 is pumped through the water vapor pipeline 12 and the vacuum pump, the barrel-shaped foundation structure can further sink under the action of pressure difference, and the barrel wall of the outer barrel 2 in the double-wall barrel-shaped mechanism is inserted into the mud surface of the seabed;
when the top cover 3 in the double-wall barrel-shaped mechanism is contacted with the mud surface of the seabed, the vacuum pump continues to pump negative pressure inside the inner barrel 1 for pressurization and super-sinking treatment;
in the negative pressure sinking process, water and gas in the cavity of the inner barrel 1 are extracted by using a water and gas pipeline 12, the total extracted water and gas amount and the water and gas amount of different cabins are controlled by using a flow control valve 11 and a single cabin control valve 10, the vacuum degrees of different cabins are monitored by using a vacuum gauge 9, the levelness of the upper mounting platform 7 is monitored by using a level gauge 14 in real time, and the levelness is fed back to a central control system 15;
the central control system 15 collects real-time monitoring data of the vacuum gauge 9 and the level gauge 14, and controls penetration postures and inclinations of different double-wall barrel-shaped mechanisms by adjusting the single-cabin control valve 10 and the flow control valve 11 through analyzing and judging the negative pressure value, the inclination and the penetration speed of the double-wall barrel-shaped mechanisms, so that the barrel-shaped foundation structure is integrally and stably sunk;
after the top cover 3 reaches the designated depth, the vacuum gauge 9 is utilized to monitor the negative pressure value of the inner barrel 1 in real time, and the negative pressure is kept to form artificial forced drainage consolidation so as to reduce the later deformation and settlement of the soil body;
if uneven settlement occurs, the upper mounting platform 7 is kept horizontal by adjusting the hydraulic adjusting mechanism 16;
after the barrel-shaped foundation structure is installed, hoisting of a block at the upper part of the offshore electrical platform, laying of cables, access to an electrical system and the like are carried out.
Claims (5)
1. A bucket foundation structure for an offshore electrical platform, characterized in that: the device is provided with a jacket, the lower ends of pile legs of the jacket are connected with a double-wall barrel-shaped mechanism, an upper mounting platform is arranged at the top of the jacket, a level and a central control system are arranged on the upper mounting platform, and a hydraulic leveling mechanism is arranged between the upper mounting platform and the jacket;
the double-wall barrel-shaped mechanism is provided with a top cover, the upper end surface of the top cover is connected with the pile legs of the jacket, and the lower end surface of the top cover is coaxially connected with an inner barrel and an outer barrel;
a partition board is arranged at the upper part in the inner barrel, the inner part of the inner barrel is divided into an upper cavity and a lower cavity which are distributed up and down through the partition board, the lower cavity is divided into a plurality of cabins communicated with the lower end of the inner barrel through a cabin dividing board, a vacuum gauge is arranged in each cabin, and each cabin is communicated with the upper cavity through a single cabin control valve arranged on the partition board; the upper cavity of the inner barrel is communicated with a vacuum pump through a flow control valve and a gas-water pipeline.
2. The bucket foundation structure for an offshore electrical platform of claim 1, wherein: the height-diameter ratio of the inner barrel is more than 1, and the height-diameter ratio of the outer barrel is less than 1.
3. The bucket foundation structure for an offshore electrical platform of claim 2, wherein: the diameter of the inner barrel is 5m, and the height of the inner barrel is 10 m; the outer barrel is 10m in length and 4m in height.
4. The bucket foundation structure for an offshore electrical platform of claim 1, wherein: the jacket is provided with a plurality of pile legs, and the pile legs are connected through horizontal struts and inclined struts.
5. The bucket foundation structure for an offshore electrical platform of claim 1, wherein: the gas-water pipeline is arranged in the pile leg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020579738.9U CN212003444U (en) | 2020-04-17 | 2020-04-17 | Bucket foundation structure for offshore electrical platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020579738.9U CN212003444U (en) | 2020-04-17 | 2020-04-17 | Bucket foundation structure for offshore electrical platform |
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| Publication Number | Publication Date |
|---|---|
| CN212003444U true CN212003444U (en) | 2020-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020579738.9U Active CN212003444U (en) | 2020-04-17 | 2020-04-17 | Bucket foundation structure for offshore electrical platform |
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| CN (1) | CN212003444U (en) |
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2020
- 2020-04-17 CN CN202020579738.9U patent/CN212003444U/en active Active
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