CN112160303A - Offshore wind power booster station platform based on self-installation concept and installation method thereof - Google Patents
Offshore wind power booster station platform based on self-installation concept and installation method thereof Download PDFInfo
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- CN112160303A CN112160303A CN202011039463.0A CN202011039463A CN112160303A CN 112160303 A CN112160303 A CN 112160303A CN 202011039463 A CN202011039463 A CN 202011039463A CN 112160303 A CN112160303 A CN 112160303A
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- offshore wind
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
- E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
- E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0039—Methods for placing the offshore structure
Abstract
The invention provides an offshore wind power booster station platform based on a self-installation concept, which comprises an upper module, a jacket, a lifting system, a box/cylinder type foundation and a box type platform deck, wherein the box type platform deck is provided with a lifting chute penetrating through the upper end and the lower end of the box type platform deck, the jacket is arranged in the lifting chute in a penetrating mode, the bottom end of the jacket is connected with the box type/cylinder type foundation, the upper module and the lifting system are respectively fixed on the box type platform deck, the lifting system is connected with the jacket and drives the jacket to move up and down along the lifting chute, and the lifting system is used for adjusting the relative height difference between the box type/cylinder type foundation and the box type platform deck. The invention has the beneficial effects that: the offshore wind power booster station platform can be integrally installed on the sea, the use of equipment such as an offshore pile hammer, a heavy crane and the like is avoided, offshore installation is completed in a short time, and the platform can be recycled.
Description
Technical Field
The invention relates to an offshore booster station, in particular to an offshore wind power booster station platform based on a self-installation concept and an installation method thereof.
Background
The offshore booster station is a key facility for power transmission and transformation in an offshore wind farm, electric energy generated by an offshore wind driven generator is collected and boosted, and the boosted electric energy is transmitted to a land electric network through a submarine cable, so that the loss of the energy on a transmission cable is reduced.
The offshore booster station generally applies a boosting device on a jacket platform, and the jacket generally adopts a steel pipe pile as a platform foundation. The installation of an offshore booster station based on a pile foundation jacket is generally divided into four steps: 1) temporarily positioning a jacket, 2) pile foundation pile sinking, 3) grouting to connect the pile foundation and the jacket, and 4) installing an upper block.
The offshore booster station adopting the jacket installation mode needs to use large offshore construction equipment such as an offshore pile hammer, an offshore heavy crane and the like in the construction process, and has long offshore installation time, high cost and large risk. In addition, after the development cycle of the offshore wind power plant is finished, the pile foundation jacket platform is difficult to dispose, the recycling rate of the platform is low, and the development cost of the offshore wind power plant is indirectly increased.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an offshore wind power booster station platform based on a self-installation concept and an installation method thereof.
The invention provides an offshore wind power booster station platform based on a self-installation concept, which comprises an upper module, a jacket, a lifting system, a box/cylinder type foundation and a box type platform deck, wherein the box type platform deck is provided with a lifting chute penetrating through the upper end and the lower end of the box type platform deck, the jacket is arranged in the lifting chute in a penetrating mode, the bottom end of the jacket is connected with the box type/cylinder type foundation, the upper module and the lifting system are respectively fixed on the box type platform deck, the lifting system is connected with the jacket and drives the jacket to move up and down along the lifting chute, and the lifting system is used for adjusting the relative height difference between the box type/cylinder type foundation and the box type platform deck.
As a further improvement of the invention, a water pumping hole is arranged on the box/cylinder type foundation and is connected with a water pumping device.
As a further improvement of the invention, the box/cylinder type foundation is a box body with an opening at the lower end.
As a further improvement of the invention, the box-type platform deck is internally provided with a closed space, and the box-type/cylindrical foundation is internally provided with a partition plate or a stiffened plate to form a plurality of compartments.
As a further improvement of the invention, a grouting hole is arranged on the box/cylinder type foundation and is connected with a grouting device.
As a further improvement of the invention, the box/cylinder type foundation and the box type platform deck are arranged in parallel, the box/cylinder type foundation is positioned below the box type platform deck, and the jacket is perpendicular to the box/cylinder type foundation.
As a further improvement of the invention, the upper module is an offshore wind power boosting device, and the upper and lower outlines of the jacket are consistent.
The invention also provides an installation method of the offshore wind power booster station platform based on the self-installation concept, which comprises the following steps:
a first step of building and assembling an offshore wind power booster station platform as described in any one of the above;
secondly, dragging the offshore wind power booster station platform to a preset area;
thirdly, starting the lifting system, driving the jacket to slide downwards along the lifting chute, so as to drive the box/cylindrical foundation to slide downwards until the box/cylindrical foundation contacts and is attached to the seabed;
fourthly, grouting into the box/cylinder type foundation to replace residual water in the box/cylinder type foundation;
and fifthly, lifting the box type platform deck to be above the sea level through the lifting system.
As a further improvement of the method, the offshore wind power booster station platform is built and assembled in a dock, the assembled offshore wind power booster station platform is loaded onto a submergible barge through a slide rail or a crane, the offshore wind power booster station platform is dragged to a preset area through the submergible barge, and the submergible barge submerges to realize unloading of the offshore wind power booster station platform.
As a further improvement of the invention, in the third step, in the process of sliding the box/cylinder foundation downwards, water is pumped outwards through the water pumping holes reserved on the box/cylinder foundation.
The invention has the beneficial effects that: by the scheme, the offshore wind power booster station platform can be integrally installed on the sea, the use of equipment such as an offshore pile hammer, a heavy crane and the like is avoided, and offshore installation is completed in a short time; in addition, after the development cycle of the offshore wind power booster station platform is finished, the novel platform can be conveniently pulled out from the seabed through the reverse operation of installation and is moved to other places to be continuously used, the recovery utilization rate is improved, and the development cost of offshore wind power is further reduced.
Drawings
FIG. 1 is a schematic illustration of the construction and assembly of an offshore wind power booster station platform based on the self-installation concept of the present invention.
FIG. 2 is a loading schematic diagram of an offshore wind power booster station platform based on a self-installation concept.
FIG. 3 is an unloading schematic diagram of an offshore wind power booster station platform based on a self-installation concept.
FIG. 4 is a schematic lifting diagram of an offshore wind power booster station platform based on a self-installation concept.
FIG. 5 is a basic in-place schematic diagram of an offshore wind power booster station platform based on a self-installation concept.
FIG. 6 is a deck positioning and operation schematic diagram of an offshore wind power booster station platform based on a self-installation concept.
Detailed Description
The invention is further described with reference to the following description and embodiments in conjunction with the accompanying drawings.
As shown in fig. 1 to 6, the offshore wind power booster station platform based on the self-installation concept comprises an upper module 2, a jacket 3, a lifting system, a box/cylindrical foundation 4 and a box platform deck 1, wherein the box platform deck 1 is provided with a lifting chute penetrating through the upper end and the lower end of the box platform deck 1, the jacket 3 is arranged in the lifting chute in a penetrating manner, the bottom end of the jacket 3 is connected with the box/cylindrical foundation 4, the upper module 2 and the lifting system are respectively fixed on the box platform deck 1, the lifting system is connected with the jacket 3 and drives the jacket 3 to move up and down along the lifting chute, and the lifting system is used for controlling the relative distance between the box/cylindrical foundation 4 and the box platform deck 1.
As shown in fig. 1 to 6, the box/cylinder type foundation 4 and the box type platform deck 1 are arranged in parallel, the box/cylinder type foundation 4 is located below the box type platform deck 1, and the jacket 3 is perpendicular to the box/cylinder type foundation 4.
As shown in fig. 1 to 6, the upper block 2 is a combination of an offshore wind power booster in accordance with a conventional booster station.
As shown in fig. 1 to 6, the conventional jacket usually has a structure with a small top and a large bottom, and the novel jacket 3 has a shape that is consistent from top to bottom. The novel jacket 3 is also a transmitter of relative displacement between the jacket deck and the foundation during the installation stage, in addition to the supporting function.
As shown in fig. 1 to 6, similar to the lifting system of the conventional jack-up type drill ship, the lifting system includes a lifting motor, a control system, a gear box, a rack, a chute, etc. which are disposed on the box/tubular foundation 4, the box-type platform deck 1, the jacket 3 for adjusting a relative height difference between the box-type platform deck 1 and the box/tubular foundation 4.
As shown in fig. 1-6, the new platform uses a single or multiple box/tubular foundations 4 instead of the pile foundations used in conventional jackets. The box/cylinder foundation 4 is shaped like an inverted box with an open lower end and sinks to a predetermined depth in the seabed under the action of the self weight of the platform and the negative pressure generated in the foundation by pumping water. When the box/cylinder foundation 4 is fully in place, the seabed surface should be attached to the foundation. The new platform can use single or multiple box/cylinder foundations 4 of different shapes to optimize the installation and in-place performance of the foundation, depending on the distribution characteristics of the upper and environmental loads and the application needs. The box/cylinder foundation 4 can be made of partition boards or stiffened plates to form a plurality of compartments, ensuring the integrity of the foundation installation and the structure under the on-site working condition.
As shown in fig. 1 to 6, the platform adopts a novel box type platform deck 1, and the upper part of the box type platform deck 1 is used for placing an upper module block 2. The box-type platform deck 1 is internally provided with a closed space, and can form considerable buoyancy when immersed, so as to assist the towing (wet towing), installation and recovery operations of the novel platform. Conventional jacket platform decks provide only one work plane for placing the upper modules.
An installation method of an offshore wind power booster station platform based on a self-installation concept comprises the following steps:
the first step is as follows: building and assembling a novel platform;
as shown in fig. 1, the construction and assembly of the new platform is completed in the dock. The upper block 2, the box-type platform deck 1 and the box/tub-type foundation 4 may be separately and separately constructed. After each part is built, the upper block 2 is fixed on the box-type platform deck 1 and then hoisted together with the box-type platform deck 1 onto the box/cylinder foundation 4. The jacket 3 is hung in a lifting chute set by the box-type platform deck 1 and the box/cylinder-type foundation 4. A lift system is mounted on top of the box/drum foundation 4 and on the box platform deck 1 and is connected to the jacket 3 for adjusting the relative position between the box platform deck 1 (including the upper module) and the box platform deck 1. The box type/cylinder type foundation 4 and the box type platform deck 1 structure need to be fixed together temporarily through tools such as clamps, and the box type/cylinder type foundation 4 and the box type platform deck 1 can be conveniently separated during offshore installation.
The second step is that: loading a novel platform;
after the platform is assembled, the platform as a whole may be loaded onto the submersible barge by means of skid rails or a crane, as shown in fig. 2. When the water depth condition of the dock allows, the second step can be skipped, and the platform can be directly launched in the dock and wet-towed to a designated sea area, so that the loading of the platform and the application of a submerged barge are avoided.
The third step: unloading the novel platform at the temporary position;
as shown in fig. 3, the new platform is towed to a predetermined area and the submergible barge is submerged to effect offloading from the installation platform. At this time, the platform floats on the sea surface by the buoyancy of the box deck. Thereafter, under appropriate sea conditions and operating conditions, the platform may be towed wet by a barge to a predetermined job site on the platform.
The fourth step: lifting the novel platform;
after the platform is towed from the temporary position to the predetermined platform site, a lifting system (also called a lifting system) is started, and the jacket slides downwards along the chute to drive the box/cylinder type foundation to approach the sea bed surface, as shown in fig. 4.
The fifth step: novel platform foundation in place
As shown in fig. 5, after the platform foundation contacts the seabed, the box/cylinder type foundation 4 is gradually sunk into the seabed by the self-weight of the platform and the applied negative water pressure. In the process of positioning the platform foundation, the draft of the box-type platform deck 1 can be gradually reduced through lifting, so that the buoyancy generated by the box-type platform deck 1 is reduced, and the self weight of the platform borne by the box-type/cylindrical foundation 4 is increased. Meanwhile, water can be pumped outwards through the water pumping holes 41 reserved in the box/cylinder type foundation 4, at the moment, the water pressure inside the box/cylinder type foundation 4 is negative relative to the water pressure outside the box/cylinder type foundation 4, and the formed pressure difference is power for promoting the box/cylinder type foundation 4 to sink. When the box/cylinder type foundation 4 is completely in place, the sea bed surface is basically attached to the bottom surface of the box/cylinder type foundation 4, and in order to help achieve the purpose, the box/cylinder type foundation 4 can be grouted through a reserved hole in the box/cylinder type foundation 4 at the final stage of installation of the box/cylinder type foundation 4, and residual water in the box/cylinder type foundation 4 can be replaced.
And a sixth step: novel deck of platform is taken one's place and is operated
As shown in fig. 6, after the foundation is installed, the lifting system lifts the box-type platform deck 1 to a certain height above the sea surface, and the platform enters the operation stage. The box platform deck 1 may serve as a temporary storage device.
The seventh step: novel platform retrieval and displacement
After the development cycle of the offshore wind farm is finished, the novel platform can be operated in the reverse direction from the sixth step to the fourth step, namely: the lifting system lowers the box type platform deck 1 to a certain depth below the water surface; the box type/cylindrical foundation 4 is pulled out from the seabed through buoyancy generated by the platform and positive water pressure formed by injecting water into the box type/cylindrical foundation 4; the lifting system continuously lifts the box type/cylindrical foundation 4 and is attached to the bottom of the box type platform deck 1, and the box type/cylindrical foundation 4 and the box type platform deck 1 are temporarily fixed together through a clamp; the novel platform can be towed to the next work site by a barge in a wet towing mode.
The offshore wind power booster station platform based on the self-installation concept and the installation method thereof can obviously reduce the construction cost of the offshore booster station, and the novel offshore wind power booster station platform mainly comprises the following components: 1) introducing a lifting system which is not available in the traditional pile foundation jacket platform; 2) the box/cylinder type foundation 4 is adopted to replace the pile foundation of the conventional jacket platform, and 3) the box type platform deck 1 is adopted to replace the plane type deck of the traditional platform. The main installation characteristics of the novel platform are as follows: 1) the platform of the offshore wind power booster station is floated and dragged in place by utilizing the buoyancy of the platform and a lifting system; 2) the foundation is put in place by utilizing the self gravity of the platform and the negative pressure formed inside the box/cylinder type foundation 4 by pumping water. Therefore, the offshore booster station platform is integrally installed on the sea, the use of equipment such as an offshore pile hammer, a heavy crane and the like is avoided, and the offshore installation is completed in a short time. In addition, after the development cycle of the offshore wind power plant is finished, the novel platform can be conveniently pulled out from the seabed through the reverse operation of installation and is moved to other places to be continuously used, the recovery utilization rate is improved, and the development cost of offshore wind power is further reduced.
In the offshore wind power development field in coastal areas of China, engineering geological phenomena of shallow bedrock burial and large fluctuation exist widely, and the engineering geological phenomena are special challenges for traditional pile foundations and pile foundation jacket platforms. The box type/cylindrical foundation 4 adopted by the novel platform is smaller in mud penetration depth, and the technical advantages of the novel self-installation platform based on the box type/cylindrical foundation 4 in the bedrock buried shallow sea area are more obvious. In addition, scouring is an engineering phenomenon that needs to be considered generally for marine foundations, and the box/cylindrical foundation 4 has superior anti-scouring performance compared with a traditional pile foundation.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. The utility model provides an offshore wind power booster station platform based on from installation concept which characterized in that: the jacket is arranged in the lifting sliding grooves in a penetrating mode, the bottom end of the jacket is connected with the box/cylindrical foundation, the upper portion module and the lifting system are fixed to the box type platform deck respectively, the lifting system is connected with the jacket and drives the jacket to move up and down along the lifting sliding grooves, and the lifting system is used for adjusting the relative height difference between the box/cylindrical foundation and the box type platform deck.
2. The offshore wind power booster station platform based on the self-installation concept of claim 1, characterized in that: and a water pumping hole is formed in the box/cylinder type foundation and is connected with a water pumping device.
3. The offshore wind power booster station platform based on the self-installation concept of claim 1, characterized in that: the box type/cylindrical foundation is a box body with an opening at the lower end, and partition plates or stiffened plates are arranged inside the box type/cylindrical foundation to form a plurality of compartments.
4. The offshore wind power booster station platform based on the self-installation concept of claim 1, characterized in that: the interior of the box platform deck has an enclosed space.
5. The offshore wind power booster station platform based on the self-installation concept of claim 1, characterized in that: and the box/cylinder foundation is provided with a grouting hole, and the grouting hole is connected with a grouting device.
6. The offshore wind power booster station platform based on the self-installation concept of claim 1, characterized in that: the box type/cylindrical foundation and the box type platform deck are arranged in parallel, the box type/cylindrical foundation is located below the box type platform deck, and the jacket is perpendicular to the box type/cylindrical foundation.
7. The offshore wind power booster station platform based on the self-installation concept of claim 1, characterized in that: the upper module is an offshore wind power boosting device, and the upper and lower shapes of the jacket are consistent.
8. An installation method of an offshore wind power booster station platform based on a self-installation concept is characterized by comprising the following steps:
a first step of building and assembling an offshore wind power booster station platform according to any of claims 1 to 7;
secondly, dragging the offshore wind power booster station platform to a preset area;
thirdly, starting the lifting system, driving the jacket to slide downwards along the lifting chute, so as to drive the box/cylindrical foundation to slide downwards until the box/cylindrical foundation contacts and is attached to the seabed;
fourthly, grouting into the box/cylinder type foundation to replace residual water in the box/cylinder type foundation;
and fifthly, lifting the box type platform deck to be above the sea level through the lifting system.
9. The self-installation concept based offshore wind power booster station platform installation method of claim 8, wherein: the offshore wind power booster station platform is built and assembled in a dock, the assembled offshore wind power booster station platform is loaded onto a submergible barge through a slide rail or a crane, the offshore wind power booster station platform is dragged to a preset area through the submergible barge, and the submergible barge submerges to realize unloading of the offshore wind power booster station platform.
10. The self-installation concept based offshore wind power booster station platform installation method of claim 8, wherein: and in the third step, in the process that the box/cylinder type foundation slides downwards, water is pumped outwards through water pumping holes reserved on the box/cylinder type foundation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011039463.0A CN112160303A (en) | 2020-09-28 | 2020-09-28 | Offshore wind power booster station platform based on self-installation concept and installation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011039463.0A CN112160303A (en) | 2020-09-28 | 2020-09-28 | Offshore wind power booster station platform based on self-installation concept and installation method thereof |
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| CN112160303A true CN112160303A (en) | 2021-01-01 |
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| CN202011039463.0A Pending CN112160303A (en) | 2020-09-28 | 2020-09-28 | Offshore wind power booster station platform based on self-installation concept and installation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373698A (en) * | 2010-08-23 | 2012-03-14 | 中国海洋石油总公司 | Moveable self-mounting platform applying cylindrical bases |
| KR20140028504A (en) * | 2012-08-29 | 2014-03-10 | 대우조선해양 주식회사 | Method and system for installing pump casing of fixed platform |
| CN103669382A (en) * | 2013-12-19 | 2014-03-26 | 天津港(集团)有限公司 | Installing, leveling and firming method for box-cylinder foundation structure to subside into foundation soil |
| CN104088266A (en) * | 2014-07-14 | 2014-10-08 | 中国海洋石油总公司 | Standardized movable wellhead platform installed in floatover mode |
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2020
- 2020-09-28 CN CN202011039463.0A patent/CN112160303A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373698A (en) * | 2010-08-23 | 2012-03-14 | 中国海洋石油总公司 | Moveable self-mounting platform applying cylindrical bases |
| KR20140028504A (en) * | 2012-08-29 | 2014-03-10 | 대우조선해양 주식회사 | Method and system for installing pump casing of fixed platform |
| CN103669382A (en) * | 2013-12-19 | 2014-03-26 | 天津港(集团)有限公司 | Installing, leveling and firming method for box-cylinder foundation structure to subside into foundation soil |
| CN104088266A (en) * | 2014-07-14 | 2014-10-08 | 中国海洋石油总公司 | Standardized movable wellhead platform installed in floatover mode |
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