CN105908772B - The construction method of offshore wind turbine gravity type foundation, basic system and gravity type foundation - Google Patents

The construction method of offshore wind turbine gravity type foundation, basic system and gravity type foundation Download PDF

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Publication number
CN105908772B
CN105908772B CN201610242765.5A CN201610242765A CN105908772B CN 105908772 B CN105908772 B CN 105908772B CN 201610242765 A CN201610242765 A CN 201610242765A CN 105908772 B CN105908772 B CN 105908772B
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cylinder
gravity type
type foundation
platform
plate
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CN105908772A (en
Inventor
元国凯
凌影
刘晋超
毕明君
张力
马兆荣
陈玉华
何小华
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China Energy Construction Group Guangdong Electric Power Design Institute Co Ltd
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China Energy Construction Group Guangdong Electric Power Design Institute Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/32Foundations for special purposes
    • E02D27/42Foundations for poles, masts or chimneys
    • E02D27/425Foundations for poles, masts or chimneys specially adapted for wind motors masts
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74Means for anchoring structural elements or bulkheads
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention discloses a kind of offshore wind turbine gravity type foundation, the construction methods of basic system and the gravity type foundation, the offshore wind turbine gravity type foundation includes the bottom plate of assembly and connection, the first cylinder, the second cylinder and platform successively, bottom plate, the first cylinder and the second cylinder connect the filler passage to be formed for filling ballast, and platform offers the platform trepanning being connected to filler passage.Gravity type foundation of the present invention is hollow structure, largely alleviates the dead weight of gravity type foundation, saves material;Equal assembly and connection between the bottom plate and first cylinder, between first cylinder and second cylinder, between second cylinder and the platform simultaneously, the present invention can be constructed in advance in land by each structure, assembly is integral successively again later, efficiently reduce the construction time of the gravity type foundation, realize simple, rapid construction, construction-time and manpower are reduced, production cost is substantially reduced.

Description

The construction method of offshore wind turbine gravity type foundation, basic system and gravity type foundation
Technical field
The present invention relates to the basic engineering technical fields of wind power generating set, more particularly, to a kind of offshore wind turbine gravity type Basic, basic system and offshore wind turbine gravity type foundation construction method.
Background technology
Currently, offshore wind turbine foundation mainly have single-pile foundation, gravity type foundation, jacket basis, underwater three pile foundation with And three pile foundations pattern waterborne etc..Wherein, gravity type foundation is as a kind of foundation pattern of comparative maturity, at sea wind-powered electricity generation It is used widely in field.Being structurally characterized in that for it provides stability by itself larger gravity and filler material.Numerous Gravity type foundation is the best one kind of stability in foundation pattern, is not limited by wind turbine type, and profile variation can be controlled freely System, preferable in geology, the shallower marine site of the depth of water has the advantages that uniqueness.But the construction of existing gravity type foundation is big at present Mostly in dock or directly on barge, whole process makes basis using cast-in-place mode, later by wherein equipment hoisting this Kind mode of construction long construction period, expends a large amount of manpower, material resources and financial resources, this increases the investment of offshore wind farm to a certain extent Cost.
Invention content
Based on this, the invention reside in overcoming the deficiencies of existing technologies, provide it is a kind of build quickly, simple and production cost compared with The construction method of low offshore wind turbine gravity type foundation, basic system and offshore wind turbine gravity type foundation, significantly simplifies wind The work progress on machine basis, improves the economy of blower foundation.
Its technical solution is as follows:
A kind of offshore wind turbine gravity type foundation, including the bottom plate of assembly and connection, the first cylinder, the second cylinder peace successively Platform, the bottom plate, first cylinder and second cylinder connect the filler passage to be formed for filling ballast, described flat Platform is equipped with the platform trepanning being connected to the filler passage.
First cylinder is conically shaped in one of the embodiments, and second cylinder is circular cylinder.
The multiple partition boards stood on the bottom plate, Duo Gesuo are equipped in the filler passage in one of the embodiments, The axis that partition board is stated around first cylinder circumferentially and is connect with the inner wall of first cylinder.
Further include the leveling flange part being set on the platform, the leveling flange part packet in one of the embodiments, Upper flange plate, the lower flange plate being oppositely arranged with the upper flange plate and multigroup fastener are included, fastener includes described in every group Both ends be each passed through the screw rod of the upper flange plate and the lower flange plate and with screw rod cooperation by the upper flange plate and The nut of the lower flange plate fastening.
The upper flange plate and the lower flange plate are annular slab in one of the embodiments, and the platform is recessed There are the holding tank around platform trepanning arrangement, the upper flange plate and the lower flange plate to be respectively positioned in the holding tank, Multigroup fastener is circumferentially.
Further include extra large cable protection pipe in one of the embodiments, the side wall of the conically shaped offers and the filler The opening of channel connection, the extra large cable protection pipe stretches into the filler passage from the platform trepanning, and is stretched out from the opening.
Further include multiple prestress anchorage cables in one of the embodiments, first cylinder and second cylinder Side wall be equipped with the one-to-one anchor cable channel of the prestress anchorage cable, be equipped in first cylinder and the prestressed anchor One-to-one first anchored end of rope, the platform be equipped with one-to-one second anchored end of first anchored end, it is described Prestress anchorage cable one end is anchored in first anchored end, and the other end sequentially passes through first cylinder and second cylinder The anchor cable channel is simultaneously anchored in second anchored end, and multiple prestress anchorage cables are circumferentially uniform around the filler passage Arrangement.
The outer wall of first cylinder is additionally provided with sacrificial anode block or corrosion-inhibiting coating in one of the embodiments, described The outer wall of first cylinder is additionally provided with multiple lifting lugs, and multiple lifting lugs are arranged circumferentially, and the lifting lug is set to the gravity At the centre of buoyancy absolute altitude on formula basis.
The technical program additionally provides a kind of basic system, including above-mentioned gravity type foundation and foundation pit, the basis Basic sea bed is equipped in hole, the basis sea bed includes sea bed filter layer and the sea bed gravel above the sea bed filter layer Layer, the bottom plate are fixed on the sea bed gravel layer, and the sea bed gravel layer is equipped with gutter.
The technical program additionally provides a kind of construction method of gravity type foundation, includes the following steps:
Bottom plate, the first cylinder, the second cylinder and platform are made respectively;
According to sequence from the bottom up successively mounting base, the first cylinder, the second cylinder and platform, the gravity type base is completed The assembling of plinth;
Excavation foundation is cheated, and in the basic sea bed of foundation pit bottom construction;
The gravity type foundation is lifted into lower water, and is transported at corresponding foundation pit in such a way that entirety is floated and dragged;
Ballast is filled in the gravity type foundation, it is made accurately to be located on basic sea bed;
The filling backfill material in foundation pit, meanwhile, ballast is filled in continuation in gravity type foundation;
The construction scour protection layer above backfill material.
The advantages of below to preceding solution or principle illustrate:
The present invention provides a kind of offshore wind turbine gravity type foundations comprising bottom plate, the first cylinder, the second cylinder and is set to The platform of second cylinder top, the gravity type foundation are hollow structure, largely alleviate gravity type foundation Dead weight, saves material;Simultaneously between the bottom plate and first cylinder, first cylinder and second cylinder it Between, equal assembly and connection between second cylinder and the platform, compared to traditional cast-in-place construction party successively from lower to upper Formula, the present invention can be constructed in advance in land by each structure, and assembly is integral successively again later, and it is heavy to efficiently reduce this The construction time on power formula basis realizes simple, rapid construction;The production of modules component batch metaplasia can be carried out simultaneously, and raising is built Speed is made, construction period is reduced, the holding time in large-scale place is reduced, reduces construction-time and manpower, substantially reduce and be produced into This.
First barrel designs of the present invention on the downside of it are taper barrel structure, are conducive to enhance the stability on entire basis and anti- It topples ability, while the second barrel designs on the upside of it are that round barrel structure is conducive to the connection of blower fan tower barrel and stopping for ship It leans on.
Multiple partition boards are equipped in the filler passage of the gravity type foundation, the filler passage is separated by multiple partition boards Multiple adjusting cabins circumferentially.During sinking under the foundation, need to keep basis in place toward basic internal jackstone or water etc., Multiple adjusting cabins are set by separating in basis, facilitate look at the amount of the water or stone in different adjusting cabin bodies, to The injection direction of water or stone etc. is can be adjusted according to the needs, and then can ensure balanced weight in filler passage, basis is in place It is safe and stable.
The invention also includes the leveling flange part for connecting blower fan tower barrel on the platform, the leveling flange parts Including upper flange plate, lower flange plate and multigroup fastener, every group of fastener includes a screw rod and multiple nuts, each spiral shell The both ends of bar are each passed through upper flange plate and lower flange plate and are fastened by nut.The present invention can be by adjusting nut on screw rod Installation site to achieve the effect that be finely adjusted upper flange plate height so that the gravity type foundation flange face is flat Whole degree meets assembling requirement, has good adaptability.
The invention also includes multiple prestress anchorage cables, multiple prestress anchorage cables are arranged circumferentially, prestress anchorage cable Prestressing force is provided for entire basis so that basis is in tensioning state always, effectively prevents blower fan tower barrel and tilts, ensures wind turbine Safe operation.
The outer wall of first cylinder is additionally provided with sacrificial anode block or corrosion-inhibiting coating, for in basis reinforcing bar and with The connected steel construction of reinforcing bar carries out effective anti-corrosion.In addition, the outer wall of first cylinder is additionally provided with multiple lifting lugs, the lifting lug supplies Towage or basis use in place carry out towage using Ruo Gan Shou towboats and transport the basis, effectively in such a way that entirety is floated and dragged Reduce transportation cost.
It is equipped with basic sea bed in foundation pit of the present invention, the basis sea bed includes sea bed filter layer and is located at the sea Sea bed gravel layer above bed filter layer, overcomes the defect of natural sea bed, improves the safety on basis.The sea bed gravel Layer is equipped with gutter, and the water of compaction generated in sinking watching for gravity type foundation to be discharged prevents water of compaction to basic sea bed It impacts, while mitigating basis difficulty in place.
Description of the drawings
Fig. 1 is the structural schematic diagram of the offshore wind turbine gravity type foundation described in the embodiment of the present invention;
Fig. 2 is the structural schematic diagram of the leveling flange part described in the embodiment of the present invention;
Fig. 3 is the A direction views of Fig. 2;
Fig. 4 is the assembling schematic diagram of the gravity type foundation and towboat described in the embodiment of the present invention;
Fig. 5 is the structural schematic diagram of the basic system described in the embodiment of the present invention;
Fig. 6 is the vertical view of the foundation pit described in the embodiment of the present invention;
Fig. 7 is the flow chart of the construction method of the gravity type foundation described in the embodiment of the present invention.
Reference sign:
10, sea level, 20, towboat, 100, bottom plate, 110, tablet, 120, shirt rim, 130, straight panel, 140, annular groove, 150, Partition board, 200, conically shaped, 210, sacrificial anode block, 220, lifting lug, the 230, first anchored end, 300, circular cylinder, 310, anti-by ship Hit component, 320, cat ladder, 400, platform, 410, manhole, 420, holding tank, the 430, second anchored end, 440, platform trepanning, 500, Filler passage, 510, adjusting cabin, 600, extra large cable protection pipe, 610, extra large cable, 700, leveling flange part, 710, upper flange plate, 720, Lower flange plate, 730, screw rod, 740, nut, 800, foundation pit, 910, sea bed filter layer, 920, sea bed gravel layer, 921, draining Ditch, 930, backfill material, 940, protection against erosion filter layer, 950, protection against erosion armour layer, 960, ballast.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, below in conjunction with attached drawing and specific embodiment party Formula, the present invention is further described in detail.It should be understood that the specific embodiments described herein are only solving The present invention is released, protection scope of the present invention is not limited.
As shown in Figure 1, a kind of offshore wind turbine gravity type foundation, including bottom plate 100, first on the bottom plate 100 Cylinder, the second cylinder being connect with the described one end of first cylinder far from the bottom plate 100 and be set to second cylinder top Platform 400, in the present embodiment, first cylinder is preferably conically shaped 200, the preferably circular cylinder of the second cylinder 300.Between the bottom plate 100 and the conically shaped 200, between the conically shaped 200 and the circular cylinder 300, the circle Grouting connection between cylinder 300 and the platform 400, specifically, two neighboring component reserves certain length in connecting portion Anchor bar is formed by connecting using high-strength grouting.The bottom plate 100, the conically shaped 200 and the circular cylinder 300 connect shape At the filler passage 500 for filling ballast 960,200 bottom outer diameter of conically shaped is less than or equal to the outer diameter of bottom plate 100, together When 200 bottom of conically shaped outer diameter be equal to circular cylinder 300 outer diameter, the platform 400 offer and the filler passage 500 connect Logical platform trepanning 440.The gravity type foundation is hollow structure, largely alleviates the dead weight of gravity type foundation, is saved Material is saved;Its downside is designed as pyramidal structure simultaneously, is conducive to the stability and resistance to capsizing that enhance entire basis.This hair It is bright also the first cylinder and the second cylinder to be both designed as circular cylinder body according to actual needs.In addition, the bottom plate 100 and described Between conically shaped 200, between the conically shaped 200 and the circular cylinder 300, between the circular cylinder 300 and the platform 400 Grouting connection, compared to traditional cast-in-place gravity type foundation form of construction work successively from lower to upper, the present invention can be by each knot Structure is constructed in advance in land, and assembly is integral successively again later, when can efficiently reduce the construction of the gravity type foundation Between, realize simple, rapid construction;The production of modules component batch metaplasia can be carried out simultaneously, improves construction speed, reduce large-scale field The holding time on ground reduces construction-time and manpower, substantially reduces production cost.
In the present embodiment, the junction of circular cylinder 300 and conically shaped 200 is located at 10 lower section of sea level so that conically shaped 200 are always positioned at 10 lower section of sea level, prevent 200 length of conically shaped excessive, increase its contact area with water, then increase lotus It carries, still further aspect, so that circular cylinder 300 is retained in 10 top of sea level, be conducive to the berthing conducive to ship.The present invention answers root According to different water depth, the length of circular cylinder 300 and conically shaped 200 can adjust.The present invention also can be according to actual needs in circular cylinder 300 It is bored with the junction setting anti-ice of conically shaped 200, the impact for resisting sea ice.
The bottom plate 100 including tablet 110 and set on the low beneath shirt rim 120 of the tablet 110, enclose by the shirt rim 120 Around the outer circumferentially arranged of the tablet 110.Shirt rim 120 can increase the interim resistance to capsizing on basis, improve erection stage Stability.The length of shirt rim 120 of the present invention depends on address situation, can also be not provided with above-mentioned skirt according to actual needs Side 120.The bottom plate 100 further includes the circumferential straight panel 130 being set on the tablet 110, and 130 one end of the straight panel is put down with described Plate 110 connects, and the other end is connect with conically shaped 200.In addition, described its bottom of tablet 110 is recessed with annular groove 140, it is used for 100 material utilization amount of bottom plate is saved, the weight of bottom plate 100 is mitigated.
The multiple partition boards 150 stood on the bottom plate 100, multiple partition boards 150 are additionally provided in the filler passage 500 Axis around the conically shaped 200 circumferentially and is connect with the inner wall of the conically shaped 200, multiple partition boards 150 The filler passage 500 is separated into multiple adjusting cabins 510 circumferentially, the adjusting cabin 510 is preferably 4~8.By During sinking under the foundation, need to keep basis in place toward 500 inside jackstone of filler passage or water etc., by filler passage Separate in 500 and multiple adjusting cabins 510 are set, the amount of the water or stone in different nacelles is facilitated look at, so as to basis The injection direction of adjustment water or stone etc. is needed, and then can ensure balanced weight in filler passage 500, basis safety in place, Stablize.
As shown in Figure 1 to Figure 3, the invention also includes the leveling flange part 700 on the platform 400, the leveling Flange part 700 includes the lower flange for connecting the upper flange plate 710 of blower fan tower barrel, being oppositely arranged with the upper flange plate 710 Plate 720 and multigroup fastener, fastener described in every group are each passed through the upper flange plate 710 and the lower flange including both ends The screw rod 730 of plate 720 and the nut for fastening the upper flange plate 710 and the lower flange plate 720 with the cooperation of the screw rod 730 740.Specifically, the upper flange plate 710 and the lower flange plate 720 are equipped with coordinates with the peripheral shape of the screw rod 730 Connecting hole, the screw rod 730 pass through the upper flange plate 710 and the lower flange plate 720 the connecting hole, and with it is described The cooperation of nut 740 fastens the upper flange plate 710 and the lower flange plate 720, passes through two high intensity in every group of fastener The fixed upper flange plate 710 of about 740 nut, and fix lower flange plate 720 by two about 740 high strength nuts.Preferably, Multigroup fastener circumferentially two encloses.The present invention can be by installation site of the adjusting nut 740 on screw rod 730 to reach To the effect being finely adjusted to 710 height of upper flange plate, so that the flatness of the gravity type foundation flange face meets wind turbine Installation requirement has good adaptability.
Preferably, the upper flange plate 710 and the lower flange plate 720 are annular slab, and the platform 400 is recessed with ring Around the holding tank 420 of the platform trepanning 440 arrangement, the upper flange plate 710 and the lower flange plate 720 are set to holding tank In 420, the burn intos such as sea wind, seawater damage leveling flange part 700 is prevented, the safety of leveling flange part 700 and steady can be enhanced It is qualitative, extend the service life of leveling flange part 700.Above-mentioned leveling flange part 700 is connected to holding tank 420 by grouting It is interior.
The invention also includes multiple prestress anchorage cable (not shown), the side walls of the circular cylinder 300 and the conically shaped 200 Be equipped with the one-to-one anchor cable channel (not shown) of the prestress anchorage cable, be equipped in the conically shaped 200 with it is described pre- One-to-one first anchored end 230 of stress anchor cable, the platform 400 are equipped with the first anchored end 230, and one-to-one Second anchored end 430, described prestress anchorage cable one end are anchored in first anchored end 230, and the other end sequentially passes through the cone The anchor cable channel of shape cylinder 200 and the circular cylinder 300 is simultaneously anchored in second anchored end 430.Multiple prestressing force Anchor yoke is arranged circumferentially around the filler passage 500.Prestress anchorage cable provides prestressing force for entire basis so that begins on basis It is in tensioning state eventually, effectively prevents blower fan tower barrel and tilts, ensures fan safe operation.
The outer wall of the conically shaped 200 is additionally provided with sacrificial anode block 210 or corrosion-inhibiting coating, the connection of sacrificial anode block 210 Part must with bar connecting in basis, for in basis reinforcing bar and the effective anti-corrosion of steel construction progress that is connected with reinforcing bar.Such as Shown in Fig. 4, the outer wall of the conically shaped 200 is additionally provided with multiple lifting lugs 220, and multiple lifting lugs 220 are arranged circumferentially, and institute It states lifting lug 220 to be set at the centre of buoyancy absolute altitude of the gravity type foundation, the lifting lug 220 is used for towage or basis are in place, is used Whole float drags mode, and carrying out towage using Ruo Gan Shou towboats 20 transports the gravity type foundation, significantly reduces transportation cost.
The outer wall of the circular cylinder 300 is additionally provided with by ship anticollision component 310 and cat ladder 320, and the platform 400 offers position Manhole 410 right over the cat ladder is additionally provided with loop wheel machine (not shown) on platform 400.Circular cylinder 300 of the present invention can It is made of concrete or steel pipe.
The invention also includes the extra large cable protection pipe 600 in the filler passage 500, extra large cable protection pipe 600 is from platform Trepanning 440 enters filler passage 500, and is arranged along the side wall of circular cylinder 300 and conically shaped 200, the side of the conically shaped 200 Wall offers the opening being connected to the filler passage 500, and the extra large cable protection pipe 600 stretches out the opening.Extra large cable 610 is placed in In extra large cable protection pipe 600, the safety for ensureing extra large cable 610.
As shown in Figure 5 and Figure 6, the present invention also provides a kind of basic systems, including above-mentioned gravity type foundation and basis Hole 800, the foundation pit 800 excavate target absolute altitude it is higher than basic target bottom plate 100 slightly lower, the size of foundation pit 800 with Orientation determines that under normal circumstances, the size of foundation pit 800 is about 100 ruler of gravity type foundation bottom plate by leading current direction Very little 2~4 times.It is equipped with basic sea bed in the foundation pit 800, the basis sea bed includes sea bed filter layer 910 and is located at institute The sea bed gravel layer 910 of 910 top of sea bed filter layer is stated, basis sea bed of the present invention overcomes the defect of natural sea bed, Improve the safety on basis.The bottom plate 100 is fixed on the sea bed gravel layer 910, and the sea bed gravel layer 910 is equipped with more Gutter 921, the water of compaction generated in sinking watching for gravity type foundation to be discharged prevent water of compaction from being made to basic sea bed At influence, while mitigating basis difficulty in place.The backfill material 930 for compressing bottom plate 100 is additionally provided in the foundation pit 800, Stability for ensureing basis meets basic antidumping requirement.It is also covered with scour protection layer on backfill material 930, including Protection against erosion filter layer 940 and the protection against erosion armour layer 950 above filter layer, for preventing around seawater scouring blower foundation The soil body, take away the silt around basis, cause basic slope, bearing capacity reduce.Preferably, which is equipped with sea The length for its scour protection layer of side that cable 610 exports is longer.
As shown in fig. 7, the present invention also provides a kind of construction methods of gravity type foundation, include mainly method of construction, fortune Transmission method and component on site construction method, specifically include following steps:
The other structures such as bottom plate 100, conically shaped 200, circular cylinder 300 and platform 400 are made respectively;
According to sequence from the bottom up successively mounting base 100, conically shaped 200, circular cylinder 300 and platform 400, completing should The assembling of gravity type foundation;
Excavation foundation hole 800, is excavated at twice, a wide range of for the first time to excavate, and is excavated for the second time to be accurate;
The basic sea bed of construction in 800 bottom of foundation pit, point two layers of construction, first layer is sea bed filter layer 910, and the second layer is Sea bed gravel layer 910;
The gravity type foundation is lifted into lower water, and corresponding foundation pit 800 is transported in such a way that entirety is floated and dragged Place;
Ballast 960 is filled in the gravity type foundation, so that it is accurately located on basic sea bed, specifically, when in place Perfusion seawater or stone carry out auxiliary adjustment during in place using lifting equipment in filler passage 500, stringent to control The gradient on the basis;
The filling backfill material 930 in foundation pit 800, meanwhile, extra large cable 610 is laid in filler passage 500, and continue to fill up Ballast 960;
The construction scour protection layer above backfill material 930, point two layers of construction, first layer is protection against erosion filter layer 940, the Two layers are protection against erosion armour layer 950;
Other accessory structures such as leveling flange part 700, loop wheel machine are installed on platform 400.
It is to be appreciated that the step of above-mentioned gravity type foundation assembling and foundation pit 800 are not necessarily the step of excavation The relationship successively executed can also be making and assembling that synchronous execution or first excavation foundation hole 800 carry out each component in basis again.
In the present embodiment, the assembling of the gravity type foundation further includes specifically the installation partition board 150 on bottom plate 100;Partition board The assembly of conically shaped 200 is again carried out after 150 installations.
Above-mentioned gravity type foundation construction method can effectively improve the construction of offshore wind turbine gravity type foundation and travelling speed, be not necessarily to Underwater grouting need to only be completed to assemble, reduces difficulty of construction and cost, the offshore wind turbine gravity type foundation and its construction in land Method has both economical and safety, and at sea wind-powered electricity generation field has preferable application prospect.
Each technical characteristic of above example can be combined arbitrarily, to keep description succinct, not to above-described embodiment In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance Shield is all considered to be the range of this specification record.
Only several embodiments of the present invention are expressed for above example, the description thereof is more specific and detailed, but can not Therefore it is construed as limiting the scope of the patent.It should be pointed out that for those of ordinary skill in the art, Under the premise of not departing from present inventive concept, various modifications and improvements can be made, these are all within the scope of protection of the present invention. Therefore, the protection domain of patent of the present invention should be determined by the appended claims.

Claims (9)

1. a kind of offshore wind turbine gravity type foundation, which is characterized in that bottom plate, the first cylinder including assembly and connection successively, second Cylinder and platform, it is logical that the bottom plate, first cylinder and second cylinder connect the filler to be formed for filling ballast Road, the platform are equipped with the platform trepanning being connected to the filler passage, are equipped with and are stood on the bottom plate in the filler passage Multiple partition boards, multiple partition boards around first cylinder axis circumferentially and the inner wall with first cylinder The filler passage is separated into multiple adjusting cabins circumferentially, can adjust ballasting as needed by connection, multiple partition boards The injection direction of object, and then can ensure balanced weight in filler passage.
2. offshore wind turbine gravity type foundation according to claim 1, which is characterized in that first cylinder is conically shaped, Second cylinder is circular cylinder.
3. offshore wind turbine gravity type foundation according to claim 1, which is characterized in that further include being set on the platform Leveling flange part, the leveling flange part includes upper flange plate, the lower flange plate that is oppositely arranged with the upper flange plate and multigroup Fastener, fastener described in every group include both ends be each passed through the upper flange plate and the lower flange plate screw rod and with institute State the nut that screw rod cooperation fastens the upper flange plate and the lower flange plate.
4. offshore wind turbine gravity type foundation according to claim 3, which is characterized in that the upper flange plate and the laxative remedy Blue plate is annular slab, and the platform is recessed with the holding tank around platform trepanning arrangement, the upper flange plate and described Lower flange plate is respectively positioned in the holding tank, and multigroup fastener is circumferentially.
5. offshore wind turbine gravity type foundation according to claim 2, which is characterized in that further include extra large cable protection pipe, it is described The side wall of conically shaped offers the opening being connected to the filler passage, and the extra large cable protection pipe stretches into institute from the platform trepanning Filler passage is stated, and is stretched out from the opening.
6. offshore wind turbine gravity type foundation according to claim 1, which is characterized in that further include multiple prestress anchorage cables, The side wall of first cylinder and second cylinder be equipped with the one-to-one anchor cable channel of the prestress anchorage cable, it is described It is equipped in first cylinder and is equipped with and first anchoring with one-to-one first anchored end of the prestress anchorage cable, the platform One-to-one second anchored end, described prestress anchorage cable one end is held to be anchored in first anchored end, the other end sequentially passes through The anchor cable channel of first cylinder and second cylinder is simultaneously anchored in second anchored end, multiple prestressing force Anchor yoke is arranged circumferentially around the filler passage.
7. offshore wind turbine gravity type foundation according to claim 1, which is characterized in that the outer wall of first cylinder is also set There are sacrificial anode block or corrosion-inhibiting coating, the outer wall of first cylinder to be additionally provided with multiple lifting lugs, multiple lifting lugs are circumferentially uniform Arrangement, and the lifting lug is set at the centre of buoyancy absolute altitude of the offshore wind turbine gravity type foundation.
8. a kind of basic system, which is characterized in that include the gravity type foundation and base as described in any one of claim 1 to 7 Plinth is cheated, and is equipped with basic sea bed in the foundation pit, and the basis sea bed includes sea bed filter layer and is located at the sea bed filter layer The sea bed gravel layer of top, the bottom plate are fixed on the sea bed gravel layer, and the sea bed gravel layer is equipped with gutter.
9. a kind of construction method of gravity type foundation, which is characterized in that include the following steps:
Bottom plate, the first cylinder, the second cylinder and platform are made respectively;
According to sequence from the bottom up successively mounting base, the first cylinder, the second cylinder and platform, the gravity type foundation is completed Assembling;
First cylinder connects the filler passage to be formed for filling ballast with second cylinder, in the filler passage The multiple partition boards stood on the bottom plate are set, multiple partition boards around first cylinder axis circumferentially and with The inner wall of first cylinder connects, and the filler passage is separated into multiple adjusting cabins circumferentially by multiple partition boards;
Excavation foundation is cheated, and in the basic sea bed of foundation pit bottom construction;
The gravity type foundation is lifted into lower water, and is transported at corresponding foundation pit in such a way that entirety is floated and dragged;
Ballast is filled in the gravity type foundation, it is made accurately to be located on basic sea bed, adjusts the note of ballast as needed Enter direction, and then can ensure balanced weight in filler passage;
The filling backfill material in foundation pit, meanwhile, ballast is filled in continuation in gravity type foundation;
The construction scour protection layer above backfill material.
CN201610242765.5A 2016-04-18 2016-04-18 The construction method of offshore wind turbine gravity type foundation, basic system and gravity type foundation Active CN105908772B (en)

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CN105908772B true CN105908772B (en) 2018-10-23

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