CN208472751U - Offshore wind turbine prestressing force gravity type foundation - Google Patents
Offshore wind turbine prestressing force gravity type foundation Download PDFInfo
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- CN208472751U CN208472751U CN201820760042.9U CN201820760042U CN208472751U CN 208472751 U CN208472751 U CN 208472751U CN 201820760042 U CN201820760042 U CN 201820760042U CN 208472751 U CN208472751 U CN 208472751U
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- 239000011148 porous material Substances 0.000 claims abstract description 13
- 230000002787 reinforcement Effects 0.000 claims abstract description 8
- 238000004873 anchoring Methods 0.000 claims abstract description 6
- 239000004576 sand Substances 0.000 claims description 15
- 230000003014 reinforcing effect Effects 0.000 claims description 10
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- 238000010276 construction Methods 0.000 abstract description 20
- 229910000831 Steel Inorganic materials 0.000 abstract description 10
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Abstract
The utility model relates to a kind of offshore wind turbine prestressing force gravity type foundations.The gravity type foundation includes bottom plate, concrete prefabricated shell and reinforcement collar tie beam；Prestressed pore passage is provided in concrete prefabricated shell, presstressed reinforcing steel penetrates prestressed pore passage, and in bottom plate, upper end is anchored in reinforcement collar tie beam anchoring lower ends；Concrete prefabricated enclosure interior cavity fills ballast filler.The gravity type foundation of the utility model, using concrete prefabricated shell structure, post-stressed tensioning is carried out to shell, the strength and stiffness of gravity type foundation greatly improved, significantly reduce the size and weight of gravity type foundation, anti- seawater corrosion effect is good, save steel, land fabrication mode is built, marine on-site installation work amount is small, save construction time and expense, structure is integrally smaller by wave and action of ocean current, center of gravity is lower, it is with good stability, it can be applied to deep water sea area, large capacity Wind turbines and geological conditions are the marine wind electric field of shallow overburden.
Description
Technical field
The utility model relates to the infrastructure technologies fields of offshore wind turbine, more particularly, to a kind of sea turn
Power generator group prestressing force gravity type foundation.
Background technique
China's marine wind electric field largely in the multiple sea area of typhoon, get over for construction by used wind power generating set power at present
Come bigger, load magnitude suffered by the multiple area's high-power wind-driven generator group of typhoon is huge, wants to the stiffness and strength on basis
Ask higher, the increase of blower single-machine capacity and the diversity of deepwater field sea bed geological conditions tie the basis of offshore wind farm unit
Configuration formula proposes new requirement and challenge.
Single-pile foundation is one of the main foundation pattern in marine wind turbine generator system base structure, but current single-pile foundation
The stake diameter of design is increasing, and steel consumption is big, and there are a wide range of shallow overburden rock foundations for China Fujian, Coastal Area of Guangdong Province
Sea bed, the sea area depth of water are more than 30 meters, and the embedding rock long construction period of large diameter steel pipe pile, at high cost, uncertain factor is big, single pile base
Plinth is difficult to be applied.
Gravity type foundation is another main foundation pattern in marine wind turbine generator system base structure, it is relied primarily on
The tilting moment and sliding force that basis and ballast weight resistance top fan loads and external environment load generate, make basis and
Blower fan pylon structure remained stable.Gravity type foundation structure part is usually reinforced concrete structures, saves steel, economy effect
Fruit is good, is built using land fabrication mode, does not need marine guidance piling operation, and marine on-site installation work amount is small, when saving construction
Between and expense.
But traditional gravity type foundation, since volume and self weight are huge, the load accounting that wave and ocean current generate basis is aobvious
It writes, traditional gravity type foundation is caused generally to be only applicable to the shallow sea water that the depth of water is no more than 10 meters；Meanwhile traditional gravity type
Basis is larger to natural foundation bearing capacity requirement, is generally only applicable to hard sand or rock foundation, can not be applied to shallowly cover
The sea area of cap rock geological conditions.
Utility model content
In view of the above-mentioned problems existing in the prior art, the purpose of this utility model is at least that provide a kind of big with being applicable in
Volume fan and deep water sea area, easy construction, it is at low cost the advantages that offshore wind turbine prestressing force gravity type foundation.
In order to achieve the above objects and other related objects, an embodiment of the utility model provides a kind of Oversea wind
Generating set prestressing force gravity type foundation, concrete prefabricated shell including bottom plate, on bottom plate and is located at concrete prefabricated
The reinforcement collar tie beam of case top；It is provided with prestressed pore passage in the concrete prefabricated shell, presstressed reinforcing steel penetrates described pre- answer
Power duct, in bottom plate, upper end is anchored in reinforcement collar tie beam anchoring lower ends；The concrete prefabricated enclosure interior cavity is filled with
Ballast filler.
In one embodiment, the concrete prefabricated shell includes the conical section of the cylinder piece housing on top, lower part
Shell and the arc transition piece housing to smoothly transit between cylinder piece housing and circular cone piece housing.
In one embodiment, the fixing end anchorage of presstressed reinforcing steel is embedded in the bottom plate；In the reinforcement collar tie beam
Portion is embedded with the stretching end anchorage of prestressed bolt, annular anchor plate and presstressed reinforcing steel；The prestressed bolt is along the annular
The circumferential centerline of anchor plate is evenly arranged inside and outside two circle；Circumferential centerline of the stretching end anchorage along the annular anchor plate
It is evenly arranged a circle, for the presstressed reinforcing steel to be anchored at the annular anchor plate；It is described annular anchor plate offer with
The prestressed bolt and stretching end anchorage position and the corresponding through-hole of number；The upper end of the prestressed bolt passes through spiral shell
Female and blower fan tower barrel bottom flanged joint, lower end are connect by nut with the annular anchor plate.
In one embodiment, the wall thickness for reinforcing collar tie beam is greater than the wall thickness of concrete prefabricated shell.
In one embodiment, the bottom plate is the round armoured concrete slab with overhanging.
In one embodiment, the ballast filler is sandstone filler.
In one embodiment, the gravity type foundation is mounted on the sea bed face for being laid with blotter, the rubble
Bed course is arranged with sand compaction pile.
The offshore wind turbine prestressing force gravity type foundation that the utility model embodiment provides, it is pre- using concrete
Shell structure processed carries out post-stressed tensioning to shell, the strength and stiffness of gravity type foundation greatly improved, significant to drop
The low size and weight of gravity type foundation precast construction, the anti-seawater corrosion effect of foundation structure is good, saves steel, land fabrication
Mode is built, and marine on-site installation work amount is small, saves construction time and expense, structure integrally by wave and action of ocean current compared with
Small, center of gravity is lower, with good stability, and it is shallow for can be applied to deep water sea area, large capacity Wind turbines and geological conditions
The marine wind electric field of coating.
Detailed description of the invention
Fig. 1 is shown as the structure of offshore wind turbine prestressing force gravity type foundation in the utility model one embodiment
Schematic diagram；
Fig. 2 is shown as the stiffening ring girder construction schematic diagram of gravity type foundation shown in Fig. 1；
Fig. 3 is shown as the annular anchor plate structural schematic diagram of gravity type foundation shown in Fig. 1；
Fig. 4 is shown as the A-A diagrammatic cross-section of gravity type foundation shown in Fig. 1；
Fig. 5 is shown as the bottom plate B-B diagrammatic cross-section of gravity type foundation shown in Fig. 1；
Fig. 6 is shown as the sand compaction pile schematic top plan view of gravity type foundation shown in Fig. 1.
Component label instructions
100 reinforce collar tie beam
110 annular anchor plates
120 stretching end anchorages
200 prestressed bolts
210 blower fan tower barrel bottom flanges
300 cylinder piece housings
400 arc transition piece housings
500 circular cone piece housings
600 presstressed reinforcing steels
610 prestressed pore passages
700 ballast fillers
800 bottom plates
810 fixing end anchorages
900 sea bed faces
910 blotters
920 sand compaction piles
Specific embodiment
The embodiments of the present invention is illustrated by particular specific embodiment below, those skilled in the art can be by this
Content disclosed by specification understands other advantages and effect of the utility model easily.
It should be clear that structure, ratio, size etc. depicted in this specification attached drawing, only to cooperate disclosed in specification
Content, for those skilled in the art understand and read, be not intended to limit the utility model enforceable qualifications,
Therefore not having technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing this reality
With under novel the effect of can be generated and the purpose that can reach, should all still falling in the revealed technology contents institute of the utility model
In the range of capable of covering.Meanwhile it is cited such as "upper", "lower", "left", "right", " centre " and " one " in this specification
Term is merely convenient to being illustrated for narration, rather than to limit the enforceable range of the utility model, the change of relativeness
Or adjustment, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the utility model.
Fig. 1-6 shows one embodiment of the utility model offshore wind turbine prestressing force gravity type foundation.
As shown in Figure 1, the prestressing force gravity type foundation includes concrete prefabricated shell and bottom plate 800, concrete prefabricated shell
Body includes three sections be sequentially connected from top to bottom, i.e. cylinder piece housing 300, arc transition piece housing 400 and circular cone piece housing
500.Further include reinforcing collar tie beam 100 at the top of cylinder piece housing 300, reinforces being embedded with prestressed bolt 200 in collar tie beam 100.Coagulation
Native premade shells carry out prestressed stretch-draw using post stretching, and in bottom plate 800, upper end is anchored in 600 anchoring lower ends of presstressed reinforcing steel
Reinforce in collar tie beam 100.Concrete prefabricated enclosure interior cavity filling ballast filler 700 is used as ballast.Entire gravity type foundation
It is mounted on the sea bed face 900 for being laid with blotter 910, when sea bed face, 900 or less geological conditions is unsatisfactory for requirement for bearing capacity,
Underwater sand compaction pile 920 can be set and carry out stiffening basic ground.Above-mentioned gravity type foundation provided by the utility model uses coagulation
Native premade shells structure carries out post-stressed tensioning to shell, the strength and stiffness of gravity type foundation greatly improved, and
And enable concrete prefabricated shell using thin-wall construction, significantly reduce the size and again of gravity type foundation precast construction
Amount, has saved material cost, compared with traditional gravity type foundation, can be applied to deep water sea area and large capacity sea turn motor
Group.
As shown in Figure 1, Figure 2 and Figure 3, reinforce collar tie beam 100 and be located at 300 top of cylinder piece housing, inside is embedded with prestressing force
Anchor bolt 200, annular anchor plate 110 and stretching end anchorage 120.Anchor plate 110, which is embedded in, to be reinforced within collar tie beam 100, and shape is circle
Annular, prestressed bolt 200 are evenly arranged inside and outside two circle along 110 circumferential centerline of anchor plate.The upper end of prestressed bolt 200 is logical
It crosses nut 220 to connect with blower fan tower barrel bottom flange 210, lower end is connect by nut 220 with anchor plate 110, and nut 220 is preferably adopted
Use high-strength nut.Stretching end anchorage 120 is evenly arranged a circle along 110 circumferential centerline of anchor plate.Anchor plate 110 is according to prestressing force
Anchor bolt 200 and the deployment scenarios of stretching end anchorage 120 circumferentially uniformly open up the through-hole of corresponding size and number.Anchor plate
110, as the structure formed a connecting link, connect up prestressed bolt 200, connect presstressed reinforcing steel 600 downwards.As connection blower
The key position of tower bottom flange 210 and gravity type foundation, the wall thickness for reinforcing collar tie beam 100 are preferably greater than concrete prefabricated shell
Thickness, and high-strength grouting material pouring molding can be used, to be further ensured that the structural reliability for reinforcing collar tie beam 100.To mention
The tensile property of high pre-stress anchor bolt 200, preferably big hexangle type high-strength bolt, quantity and specification can be transmitted according to top
The fan loads to come over, which calculate, to be determined.Pretightning force, Neng Goubao are applied to blower fan tower barrel bottom flange 210 by prestressed bolt 200
The structure that card reinforces collar tie beam 100 is in pressured state always, significantly improves the tired longevity for reinforcing 100 position concrete of collar tie beam
Life, by the installation site of adjusting nut 220, can also level blower fan tower barrel bottom flange 210, to make the utility model
The above-mentioned gravity type foundation provided can meet requirement of the blower fan tower barrel lifting to ring flange flatness, anchor plate 110 well
Equably directly the load of prestressed bolt 200 can be transmitted in presstressed reinforcing steel 600 and concrete, part will not be generated and answered
The phenomenon that power is concentrated.
As shown in Figure 1, Figure 4 and Figure 5, between the cylinder piece housing 300 and circular cone piece housing 500 in concrete prefabricated shell
It is smoothly transitted by arc transition piece housing 400, three part housing can be armored concrete precast construction, it is preferred to use high-intensitive
It is concrete prefabricated to form.Remain for penetrating the prestressed pore passage of presstressed reinforcing steel 600 in advance along the even circumferential of concrete prefabricated shell
610, the duct 610 is corresponding with the through-hole on 110 circumferential centerline of anchor plate.Presstressed reinforcing steel is penetrated in prestressed pore passage 610
After 600, using post stretching to concrete prefabricated shell carry out prestressed stretch-draw, presstressed reinforcing steel 600 through cylinder piece housing 300,
The prestressed pore passage 610 reserved on arc transition piece housing 400 and circular cone piece housing 500, anchoring lower ends are in consolidating in bottom plate 800
Determine on anchorage 810, upper end is anchored on the anchor plate 110 reinforced in collar tie beam 100 by stretching end anchorage 120.Presstressed reinforcing steel 600
High-strength low relaxed prestress steel strand can be selected.Bottom plate 800 preferably with overhanging round armoured concrete slab, it is internal pre-buried
There is the fixing end anchorage 810 of presstressed reinforcing steel 600, bottom plate 800 can be rest directly upon the sea bed face 900 for being equipped with blotter 910
On.Using the prestressed structure shape of sequentially connected cylinder piece housing 300, arc transition piece housing 400, circular cone piece housing 500
Formula, the stress that fan loads are transferred to foundation bottom is clear, and load transmission path is simply direct, using post-stressed coagulation
Soil structure, structural strength and rigidity are big, and anti-seawater corrosion effect is good, and ballast filling operation is disposably completed, easy for construction, nothing
Need to a point storehouse repeatedly fill；300 sectional dimension of cylinder piece housing is smaller, and the wave and action of ocean current being subject to are smaller；Arc transition section
400 structure of shell can reduce loss of prestress, effectively transmit the precompression that 600 tensioning of presstressed reinforcing steel generates concrete；Circle
Cone piece housing 500 is capable of providing enough spaces and guarantees ballast weight, reduces structural focus, is conducive to basic monolithic stability.
Bottom plate 800 has overhanging, and settable longer overhanging, can effectively reduce the size of circular cone piece housing 500, and diffusion basis is answered
Power.
Ballast filler 700 is preferably sandstone filler, such as the gradation filler of sea sand, rubble or seawater, is filled in described
Cylinder piece housing 300, arc transition piece housing 400, circular cone piece housing 500 cavity in be used as ballast.Gravity type foundation
Very big to ballast demand, coastal area sea sand, rubble equipressure loading supply are sufficient, cheap, advantageously reduce
Engineering cost.
As shown in fig. 6, sand compaction pile 920 is to be pressed into underwater shallow covering ground using stake equipment is filled by sand material, preferably medium coarse sand
The closely knit granular pile that base is formed, can reinforce the shallow-layer soil body, improve foundation bearing capacity, reduce settlement of foundation.Shallow overburden
The embedding rock long construction period of the large diameter steel pipe pile in sea area, it is at high cost, consolidation process is carried out to the shallow-layer soil body using sand compaction pile 920
It can avoid embedding rock construction, solve the problems, such as that traditional gravity type basis can not be applied to shallow overburden sea area.
The installation method of the offshore wind turbine prestressing force gravity type foundation of the present embodiment, comprising the following steps:
1) concreting bottom plate 800, and the pre-buried fixed anchorage 810 in bottom plate 800 are utilized, such as by pre- before pouring
The mode that fixed anchorage 810 is fixedly connected with the reinforcing bar in bottom plate 800 is first realized into the preparatory of fixed anchorage 810 and bottom plate 800
It is fixed；
2) casting concrete premade shells, and prestressed pore passage 610 is reserved in concrete prefabricated shell；
3) reinforce collar tie beam 100 using concreting, 200 lower end of prestressed bolt passes through nut 220 and annular anchor plate
110 be fixedly connected after be embedded in reinforce collar tie beam 100 in, and reinforce collar tie beam 100 in reserve annular slot space, the annular slot space
Annular anchor plate 110 is passed down through for presstressed reinforcing steel 600, penetrates prestressed pore passage 610 and post-tensioning pulling process；Prestressed bolt
200 and annular anchor plate 110 reinforce in collar tie beam 100 it is pre-buried for example by before pouring in advance by annular anchor plate 110 with plus
The mode that reinforcing bar in strong collar tie beam 100 is fixedly connected realizes prestressed bolt 200 and annular anchor plate 110 and reinforces collar tie beam 100
Preparatory fixation；
4) presstressed reinforcing steel 600 is penetrated into prestressed pore passage 610,600 anchoring lower ends of presstressed reinforcing steel through above-mentioned annular slot space
In on the fixation anchorage 810 in bottom plate 800, upper end is anchored in the annular anchor pad reinforced in collar tie beam 100 by stretching end anchorage 120
On plate 110,600 upper end of presstressed reinforcing steel carries out stretching construction by stretching end anchorage 120；
5) it is in the milk after stretching construction to prestressed pore passage 610, makes presstressed reinforcing steel 600 and concrete prefabricated shell
It is fixedly connected；
6) it is in the milk, makes annular anchor plate 110, prestressed bolt 200 and adds to the annular slot space for reinforcing collar tie beam 100
Strong collar tie beam 100 is fixedly connected；
7) by prestressing force gravity type foundation whole Transporting to Attention problems position, using crane ship righting, tugboat auxiliary is fixed
Position, water filling is sunk in the cavity of concrete prefabricated shell, is mounted on the sea bed face 900 for being laid with blotter 910；When
When 900 or less geological conditions of sea bed face is unsatisfactory for requirement for bearing capacity, underwater sand compaction pile 920 can be set in advance and carries out foundation stabilization
Processing；
8) ballast filler 700 is filled in the cavity of concrete prefabricated shell as ballast；
9) upper end of prestressed bolt 200 is connect by nut 220 with blower fan tower barrel bottom flange 210, passes through adjusting nut
220 installation site levels blower fan tower barrel bottom flange 210, meets blower fan tower barrel lifting and wants to ring flange flatness
It asks.
As described above, the beneficial effects of the utility model are:
1. the utility model uses concrete material, especially with high-strength compared with existing gravity type foundation structure
Prefabricated concrete shell structure is spent, and post-stressed tensioning is carried out to shell, gravity type foundation greatly improved
Strength and stiffness, while significantly reducing the size and weight of gravity type foundation structure, gravity type foundation applied
In deep water sea area and large capacity Wind turbines.
2. the utility model can be suitable for hard sand or rock foundation sea compared with existing large diameter single pile foundation
Bed, have many advantages, such as it is land build, without piling, operation on the sea amount is small, saving steel, reduction offshore construction time and expense.
3. blower fan tower barrel and basis top connection type use prestressed bolt interconnection technique, so that whole cross section stress begins
It is in pressured state eventually, effectively increases the fatigue life of concrete of connecting portion.
4. handling shallow overburden ground using underwater sand compaction pile, solve the embedding rock long construction period of large diameter steel pipe pile,
It is at high cost, the big problem of uncertain factor, so that gravity type foundation can be applied to shallow overburden geology sea area.
5. using cylinder piece housing, arc transition piece housing, conical section shell structure form, it is capable of providing enough spaces
Guarantee ballast weight, while structure is integrally up-thin-low-thick, be conducive to reduce wave and action of ocean current, lower the center of gravity height, protects
Demonstrate,prove basic monolithic stability；Ballast filling operation is disposably completed, easy for construction, is repeatedly filled without point storehouse.
6. offshore wind turbine prestressing force gravity type foundation structure is easily installed and removes, greatly reduces sea and apply
Work workload, has both saved the duration, improves construction efficiency, and reduce project cost, has good economy.
The above embodiments are only illustrative of the principle and efficacy of the utility model, and not for limitation, this is practical new
Type.Any person skilled in the art can all carry out above-described embodiment under the spirit and scope without prejudice to the utility model
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the revealed essence of the utility model
All equivalent modifications or change completed under mind and technical idea, should be covered by the claim of the utility model.
Claims (7)
1. a kind of offshore wind turbine prestressing force gravity type foundation, it is characterised in that:
The prestressing force gravity type foundation include bottom plate, the concrete prefabricated shell on bottom plate and be located at concrete prefabricated shell
Reinforcement collar tie beam at the top of body；
Prestressed pore passage is provided in the concrete prefabricated shell, presstressed reinforcing steel penetrates the prestressed pore passage, anchoring lower ends
In in bottom plate, upper end is anchored in reinforcement collar tie beam；
The concrete prefabricated enclosure interior cavity is filled with ballast filler.
2. gravity type foundation according to claim 1, it is characterised in that:
The concrete prefabricated shell include the cylinder piece housing on top, the circular cone piece housing of lower part and in cylinder piece housing and
The arc transition piece housing to smoothly transit between circular cone piece housing.
3. gravity type foundation according to claim 1, it is characterised in that:
The fixing end anchorage of presstressed reinforcing steel is embedded in the bottom plate；
The stretching end anchorage of prestressed bolt, annular anchor plate and presstressed reinforcing steel is embedded with inside the reinforcement collar tie beam；
The prestressed bolt is evenly arranged inside and outside two circle along the circumferential centerline of the annular anchor plate；
The stretching end anchorage is evenly arranged a circle along the circumferential centerline of the annular anchor plate, is used for the presstressed reinforcing steel
It is anchored on the annular anchor plate；
The annular anchor plate offers through-hole corresponding with the prestressed bolt and stretching end anchorage position and number；
The upper end of the prestressed bolt passes through nut and the annular anchor by nut and blower fan tower barrel bottom flanged joint, lower end
Backing plate connection.
4. gravity type foundation according to claim 1, it is characterised in that:
The wall thickness for reinforcing collar tie beam is greater than the wall thickness of concrete prefabricated shell.
5. gravity type foundation according to claim 1, it is characterised in that:
The bottom plate is the round armoured concrete slab with overhanging.
6. gravity type foundation according to claim 1, it is characterised in that:
The ballast filler is sandstone filler.
7. gravity type foundation according to claim 1, it is characterised in that:
The gravity type foundation is mounted on the sea bed face for being laid with blotter, and the blotter is arranged with sand compaction pile.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820760042.9U CN208472751U (en) | 2018-05-21 | 2018-05-21 | Offshore wind turbine prestressing force gravity type foundation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820760042.9U CN208472751U (en) | 2018-05-21 | 2018-05-21 | Offshore wind turbine prestressing force gravity type foundation |
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ID=65218385
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110644521A (en) * | 2019-09-18 | 2020-01-03 | 中国三峡新能源(集团)股份有限公司 | Reinforcement method of single pile for offshore wind power ice-resistant structure and reinforcement foundation |
| CN116517014A (en) * | 2023-04-25 | 2023-08-01 | 中国电建集团河南省电力勘测设计院有限公司 | Land wind power cavity fan foundation structure and construction method thereof |
| WO2025008045A1 (en) * | 2023-07-03 | 2025-01-09 | Cobod International A/S | A base for a wind turbine, a wind turbine installed on a base, and a method for making a base for a wind turbine |
-
2018
- 2018-05-21 CN CN201820760042.9U patent/CN208472751U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110644521A (en) * | 2019-09-18 | 2020-01-03 | 中国三峡新能源(集团)股份有限公司 | Reinforcement method of single pile for offshore wind power ice-resistant structure and reinforcement foundation |
| CN116517014A (en) * | 2023-04-25 | 2023-08-01 | 中国电建集团河南省电力勘测设计院有限公司 | Land wind power cavity fan foundation structure and construction method thereof |
| WO2025008045A1 (en) * | 2023-07-03 | 2025-01-09 | Cobod International A/S | A base for a wind turbine, a wind turbine installed on a base, and a method for making a base for a wind turbine |
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