CN103243735A - Prestressed concrete cylindrical foundation with oblique supports - Google Patents
Prestressed concrete cylindrical foundation with oblique supports Download PDFInfo
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- CN103243735A CN103243735A CN2013101740282A CN201310174028A CN103243735A CN 103243735 A CN103243735 A CN 103243735A CN 2013101740282 A CN2013101740282 A CN 2013101740282A CN 201310174028 A CN201310174028 A CN 201310174028A CN 103243735 A CN103243735 A CN 103243735A
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Abstract
The invention discloses a prestressed concrete cylindrical foundation with oblique supports. The prestressed concrete cylindrical foundation with the oblique supports is composed of a concrete cylindrical foundation, the concrete oblique supports, a concrete transition section and prestressed steel bars. The top cover of the concrete cylindrical foundation, the concrete oblique supports and the concrete transition section are poured as a whole. The concrete transition section is a hollow cylinder with linearly-changed diameter and thickness from the top to the bottom. The prestressed steel bars are evenly arranged in the ring direction on the wall of the transition tower section. The concrete oblique supports are evenly and radially arranged at the bottom of the transition section, and the prestressed steel bars are arranged inside the concrete oblique supports obliquely. A flange plate is embedded into the top of the transition section, and the transition section is connected with a wind turbine tower through the flange plate. The prestressed concrete cylindrical foundation with the oblique supports can improve prestressing condition of the structure, enable the structure to have no crack in the construction and the operation, enhances the durability and the stability of the structure, and is simple in improved structure, easy to construct and wide in application.
Description
Technical field
The invention belongs to the foundation structure field in offshore wind farm, harbour, ocean and the hydraulic engineering, more particularly, relate to a kind of prestressed concrete cylindrical foundation structure system with bearing diagonal.
Background technology
Blower foundation is the important component part during offshore wind farm is built, its structure stress and stability influence the safety of whole blower fan structure, in cost, also occupy larger specific gravity.Use more offshore wind turbine foundation at present gravity type foundation, pile foundation, jacket and bucket foundation are arranged.Bucket foundation is as a kind of novel base form, and have following remarkable advantage: applicable elements is wide; Save steel using amount, save cost; The construction of employing negative pressure, speed of application is fast, is convenient to the construction of marine bad weather gap; Can install prefabricatedly by land, haul is convenient to peace and transportation to the building site again; The tube base directly inserts in the shallow layer foundation, and it goes without doing, and ground is handled, and only needs sea bed superficial part geological conditions is reconnoitred, and during the wind energy turbine set end-of-life, can extract simply and easily and carry out the secondary utilization.Therefore, bucket foundation becomes hot research in recent years.But it is big that local stress often all appears in existing steel concrete cartridge type foundation structure, problems such as construction complexity, can't reach the fissureless optimum state of concrete structure in the ocean engineering, in case the crack appears in structure, seawater will produce corrosiveness to the inside configuration reinforcing bar, finally cause whole blower fan structural damage.
Summary of the invention
The present invention is intended to overcome the deficiencies in the prior art, a kind of new concrete cylinder-shaped foundation structure is proposed, this structure can be improved the stress situation of structure self, make structure in construction and running, not produce the crack, increase durability of structures and stability, and structure-improved is simple, and easy construction is applied widely.
Technical purpose of the present invention is achieved by following technical proposals.
A kind of prestressed concrete cylindrical basis with bearing diagonal is made up of bucket foundation, bearing diagonal and basic transition tower tube section, and bucket foundation is the steel concrete cartridge type structure that is provided with top pressure closure, and its top cover is furnished with the prestressed reinforcement that two rows are groined type; Bearing diagonal is concrete structure, wherein is provided with prestressed reinforcement, and described bearing diagonal is arranged on the top pressure closure of bucket foundation, be the center of circle with basic transition tower tube section, be radially evenly distribution, arrange radical (quantity) according to actual conditions, 10-16 (individual) all can; Basis transition tower tube section is prestressed reinforced concrete construction, wherein be provided with prestressed reinforcement, the external diameter of described basic transition tower tube section and wall thickness by the upper end down end line increase progressively, its upper end is connected and fixed by flange and generating set tower tube, and it is an integral body that its lower end and steel concrete cartridge type basis, bearing diagonal water.
Described bucket foundation diameter 25-50m, preferred 30-50m; Wall thickness 30-50cm, preferred wall thickness 40-50cm; Top cover thickness 30-60cm, preferred 50-60cm; Barrel height 6-15m, preferred 6-10m.
The long limit of described bearing diagonal (fillet of bearing diagonal and basic transition tower tube section) 4-10m, preferred 4-6m; Minor face (fillet of bearing diagonal and bucket foundation) 0.5-5m, preferred 0.5-1m; Angle of slope (hypotenuse of bearing diagonal and the angle of horizontal direction) is 10-30 °, is preferably 10-17 °.
Described basic transition tower tube section top external diameter 4-8m, preferred external diameter 6-8m, wall thickness 0.4-0.6m; With the top cover junction external diameter 10-12m of bucket foundation, wall thickness 1-2m, preferred wall thickness 1-1.4m, overall height 15-40m, preferred overall height 20-30m.
In the described basic transition tower tube section, prestressed reinforcement divides two circles to arrange, each 15-25 bundle, preferred 20-25 bundles, its top is fixed on the flange, and hypomere reaches the top cover bottom of bucket foundation, and use the ground tackle anchoring, two bundle prestressed reinforcement center distance are 150mm-300mm, preferred 250mm-300mm, and prestressing tendon is not less than 50mm apart from this member edge spacing.
In the described bearing diagonal, the two bundle prestressed reinforcements that are arranged in parallel up and down, described two bundle prestressed reinforcement center distance are 150mm-300mm, preferred 250mm-300mm, and prestressing tendon is not less than 50mm apart from this member edge spacing.
The prestressed reinforcement spacing 0.5-1.2m that arranges on the described bucket foundation top cover, preferred distance 1-1.2m divides two-layer layout up and down, arranges 25-50 bundles for every layer, arranges 25-30 bundles for preferred every layer, and its end is anchored at the barrel periphery by ground tackle with prestressed reinforcement.
The present invention proposes a kind of prestressed concrete cylindrical foundation structure with bearing diagonal, this structure is mainly carried out build optimization to the connecting portion of concrete changeover portion and tube top cover and changeover portion, improve the structural stress situation, avoided the stress of top cover and superstructure to concentrate, take full advantage of the bearing capacity of material, improve the stress situation of bucket foundation under construction and operation condition, improve stability of structure and durability.Under identical load, reduce physical dimension and prestressed reinforcement consumption, and then improved the economy of structure.This form of structure and other bucket foundation differences: top cover reaches and all adopts the prestressed concrete soil material with the upper part, has reduced steel using amount; It is better than the mode of transfer force that adds prestressed girder to add the prestressing force bearing diagonal on the top cover, has avoided load directly vertically to pass to top cover, and it is bad to cause top cover to be drawn; The changeover portion diameter increases from top to bottom, can alleviate changeover portion bottom stress concentration phenomenon, and the form that thickness increases from top to bottom can avoid the changeover portion base diameter excessive, reduces flow-disturbing.The present invention can be prefabricated on land, utilizes the cavity of structure self, divides the storehouse inflation, towage is to construction location under certain traction, and use negative pressure to load and the limit wall is high-pressure aerated or water breaks ground can sink to ground, reduce freight and construction cost greatly, and the also recyclable utilization of this structure.Bearing diagonal, the ingenious design of the concrete changeover portion structure of gradual change diameter and gradual change wall thickness takes full advantage of the material property of concrete and prestressed reinforcement, reduces material usage greatly, safety economy.
Description of drawings
Fig. 1 is the prestressed concrete cylindrical basis generalized section of band bearing diagonal of the present invention.
Fig. 2 is the prestressed concrete cylindrical basis schematic top plan view of band bearing diagonal of the present invention.
Wherein 1 is bucket foundation; 2 is basic transition tower tube section; 3 is bearing diagonal; 4 is flange; 5 is prestressed reinforcement; 6 is generating set tower tube.
The specific embodiment
Further specify technical scheme of the present invention below in conjunction with specific embodiment.
Shown in attached Fig. 1 and 2, a kind of prestressed concrete cylinder type basis with bearing diagonal, be made up of bucket foundation 1, bearing diagonal 3 and basic transition tower tube section 2, bucket foundation 1 is for being provided with the steel concrete cartridge type structure of top pressure closure, and its top cover is furnished with the prestressed reinforcement that two rows are groined type; Bearing diagonal 3 is concrete structure, arranges radical according to actual conditions, 10-16 all can, it is arranged on the top pressure closure of bucket foundation 1, is the center of circle with basic transition tower tube section 2, is radially evenly to distribute; Basis transition tower tube section 2 for prestressed reinforced concrete construction by the upper end down end line increase progressively, its upper end is connected and fixed by flange 4 and generating set tower tube 6, it is an integral body that its lower end and steel concrete cartridge type basis 1, bearing diagonal 3 water.
Described bucket foundation diameter 25-50m, preferred 30-50m; Wall thickness 30-50cm, preferred wall thickness 40-50cm; Top cover thickness 30-60cm, preferred 50-60cm; Barrel height 6-15m, preferred 6-10m.The long limit of described bearing diagonal (fillet of bearing diagonal and basic transition tower tube section) 4-10m, preferred 4-6m; Minor face (fillet of bearing diagonal and bucket foundation) 0.5-5m, preferred 0.5-1m; Angle of slope (hypotenuse of bearing diagonal and the angle of horizontal direction) is 10-30 °, is preferably 10-17 °.Described basic transition tower tube section top external diameter 4-8m, preferred external diameter 6-8m, wall thickness 0.4-0.6m; With the top cover junction external diameter 10-12m of bucket foundation, wall thickness 1-2m, preferred wall thickness 1-1.4m, overall height 15-40m, preferred overall height 20-30m.In the described basic transition tower tube section, prestressed reinforcement divides two circles to arrange, each 15-25 bundle, preferred 20-25 bundles, its top is fixed on the flange, and hypomere reaches the top cover bottom of bucket foundation, and use the ground tackle anchoring, two bundle prestressed reinforcement center distance are 150mm-300mm, preferred 250mm-300mm, and prestressing tendon is not less than 50mm apart from this member edge spacing.In the described bearing diagonal, the two bundle prestressed reinforcements that are arranged in parallel up and down, described two bundle prestressed reinforcement center distance are 150mm-300mm, preferred 250mm-300mm, and prestressing tendon is not less than 50mm apart from this member edge spacing.The prestressed reinforcement spacing 0.5-1.2m that arranges on the described bucket foundation top cover, preferred distance 1-1.2m divides two-layer layout up and down, arranges 25-50 bundles for every layer, arranges 25-30 bundles for preferred every layer, and its end is anchored at the barrel periphery by ground tackle with prestressed reinforcement.
Bucket foundation with the 3MW offshore wind turbine is example, and concrete adopts C60, and the prestress wire nominal diameter is 15.2mm, and the tensile strength design load is 1320MPa.Steel concrete cartridge type basis diameter 30m, wall thickness 40cm, top cover thickness 50cm, barrel height 6m; Transition tower tube section top external diameter 6m, wall thickness 0.6m is with the top cover junction external diameter 10m of bucket foundation, wall thickness 1m, overall height 20m; 16 of bearing diagonals are connected with transition tower tube section, along the circumferential direction evenly arrange, long limit 4m, and minor face 1m, the angle of slope is 17 °; The changeover portion presstressed reinforcing steel divides two circles to arrange, each 25 bundle, and the precompression that single bundle presstressed reinforcing steel produces is 240t, and the presstressed reinforcing steel top can be fixed on the flange, and hypomere reaches the top cover bottom, and uses the ground tackle anchoring; The two bundle presstressed reinforcing steels that are arranged in parallel up and down in the bearing diagonal, every bundle presstressed reinforcing steel produces 137t pressure; Top cover presstressed reinforcing steel spacing 1m divides two-layer layout up and down, arranges 29 bundles for every layer, and every bundle presstressed reinforcing steel produces 104t pressure, and the end is anchored at the barrel periphery by ground tackle with reinforcing bar.Above prestressed reinforcement interfascicular, center distance are 250mm-300mm, are not less than 50mm apart from member edge spacing.
Under the effect of 3MW ultimate load, the concrete maximum crushing stress is 21.6MPa, less than concrete axial compressive strength design load 27.5MPa; Maximum tension stress is 2.17MPa, is a bit larger tham concrete axial tensile strength design load 2.04MPa, mainly appears at top cover and mud face contact site, and scope is very little, and structure is not constituted a threat to.The work progress of this structure is as follows: 1) from the tube base, from bottom to top, by fixing reinforcing cage, the concreting then built of grinding tool; 2) need the position of stretch-draw prestressing force should reserve the presstressed reinforcing steel hole in the steel concrete position, Deng concrete reach abundant intensity (be not less than design strength grade of concrete 75%) after, prestressed reinforcement is penetrated the duct, and utilize member itself to carry out stretch-draw as afterburning pedestal, after stretch-draw finishes, reinforcing bar is anchored at the two ends of member with the work ground tackle; 3) be in the milk in the duct, prevent corrosion of steel bar and make prestressed reinforcement and concrete is better formed an integral body; 4) with lifting machine the segmentation of blower fan unit tower tube is installed on the bucket foundation; 5) by special towage ship, mounted whole blower fan structure is checked the construction destination.
More than the present invention has been done exemplary description; should be noted that; under the situation that does not break away from core of the present invention, the replacement that is equal to that any simple distortion, modification or other those skilled in the art can not spend creative work all falls into protection scope of the present invention.
Claims (9)
1. prestressed concrete cylindrical basis with bearing diagonal, it is characterized in that, be made up of bucket foundation, bearing diagonal and basic transition tower tube section, described bucket foundation is the steel concrete cartridge type structure that is provided with top pressure closure, and its top cover is furnished with the prestressed reinforcement that two rows are groined type; Bearing diagonal is concrete structure, wherein is provided with prestressed reinforcement, and described bearing diagonal is arranged on the top pressure closure of bucket foundation, is the center of circle with basic transition tower tube section, is radially evenly to distribute; Described basic transition tower tube section is prestressed reinforced concrete construction, wherein is provided with prestressed reinforcement, the external diameter of described basic transition tower tube section and wall thickness by the upper end down end line increase progressively; The upper end of described basic transition tower tube section is connected and fixed by flange and generating set tower tube, and it is an integral body that the lower end of described basic transition tower tube section and steel concrete cartridge type basis, bearing diagonal water.
2. a kind of prestressed concrete cylindrical basis with bearing diagonal according to claim 1 is characterized in that, described bucket foundation diameter 25-50m; Wall thickness 30-50cm; Top cover thickness 30-60cm; Barrel height 6-15m.
3. a kind of prestressed concrete cylindrical basis with bearing diagonal according to claim 2 is characterized in that, the preferred 30-50m of described bucket foundation diameter; Preferred 40-the 50cm of wall thickness; Preferred 50-the 60cm of top cover thickness; Preferred 6-the 10m of barrel height.
4. a kind of prestressed concrete cylindrical basis with bearing diagonal according to claim 1, it is characterized in that, the prestressed reinforcement spacing 0.5-1.2m that arranges on the described bucket foundation top cover, divide two-layer layout up and down, arrange 25-50 bundles for every layer, its end is anchored at the barrel periphery by ground tackle with prestressed reinforcement.
5. a kind of prestressed concrete cylindrical basis with bearing diagonal according to claim 4 is characterized in that, the preferred 1-1.2m of prestressed reinforcement spacing that arranges on the described bucket foundation top cover divides two-layer layout up and down, arranges 25-30 bundles for preferred every layer.
6. a kind of prestressed concrete cylindrical basis with bearing diagonal according to claim 1 is characterized in that, the long limit 4-10m of described bearing diagonal; Minor face 0.5-5m; The angle of slope is 10-30 °; In described bearing diagonal, the two bundle prestressed reinforcements that are arranged in parallel up and down, described two bundle prestressed reinforcement center distance are 150mm-300mm, and prestressing tendon is not less than 50mm apart from this member edge spacing; The quantity of described bearing diagonal is 10-16.
7. a kind of prestressed concrete cylindrical basis with bearing diagonal according to claim 6 is characterized in that, the preferred 4-6m in long limit of described bearing diagonal; Preferred 0.5-the 1m of minor face; The angle of slope is preferably 10-17 °, in the described bearing diagonal, and the two bundle prestressed reinforcements that are arranged in parallel up and down, the preferred 250mm-300mm of described two bundle prestressed reinforcement center distance.
8. a kind of prestressed concrete cylindrical basis with bearing diagonal according to claim 1 is characterized in that, described basic transition tower tube section top external diameter 4-8m, wall thickness 0.4-0.6m; With the top cover junction external diameter 10-12m of bucket foundation, wall thickness 1-2m, overall height 15-40m; In described basic transition tower tube section, prestressed reinforcement divides two circles to arrange, each 15-25 bundle, its top is fixed on the flange, hypomere reaches the top cover bottom of bucket foundation, and use the ground tackle anchoring, two bundle prestressed reinforcement center distance are 150mm-300mm, and prestressing tendon is not less than 50mm apart from this member edge spacing.
9. a kind of prestressed concrete cylindrical basis with bearing diagonal according to claim 8 is characterized in that, the preferred 6-8m of described basic transition tower tube section top external diameter; With the preferred 1-1.4m of top cover junction wall thickness of bucket foundation, preferred overall height 20-30m; In described basic transition tower tube section, prestressed reinforcement divides two circles to arrange, each preferred 20-25 bundle, the preferred 250mm-300mm of two bundle prestressed reinforcement center distance.
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| CN2013101740282A CN103243735A (en) | 2013-05-11 | 2013-05-11 | Prestressed concrete cylindrical foundation with oblique supports |
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Cited By (10)
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| CN103953059A (en) * | 2014-05-04 | 2014-07-30 | 云南省电力设计院 | Guy anchoring type offshore wind turbine foundation |
| CN106649196A (en) * | 2016-11-30 | 2017-05-10 | 中国电建集团北京勘测设计研究院有限公司 | Method for performing checking calculation on local compression of concrete of connection part between wind-driven generator foundation and foundation ring lower flange |
| CN107923137A (en) * | 2015-08-27 | 2018-04-17 | 乌本产权有限公司 | Wind energy facility |
| CN109537621A (en) * | 2018-12-19 | 2019-03-29 | 天津大学 | A kind of combined type sea windward electricity bucket foundation |
| CN109914460A (en) * | 2019-02-27 | 2019-06-21 | 重庆大学 | A kind of novel suction cartridge type composite structure wind power foundation suitable for shallow sea |
| CN111456072A (en) * | 2019-01-18 | 2020-07-28 | 深圳国金电力新能设计院有限公司 | Center cylinder, tower cylinder foundation, construction method of tower cylinder foundation and tower cylinder |
| CN111910673A (en) * | 2020-08-11 | 2020-11-10 | 天津大学 | Assembled offshore wind power barrel type foundation |
| CN114319417A (en) * | 2022-02-22 | 2022-04-12 | 重庆大学 | Barrel-shaped assembled wind power tower barrel foundation and construction method thereof |
| CN114411829A (en) * | 2022-01-25 | 2022-04-29 | 中国电建集团海南电力设计研究院有限公司 | Pile foundation and fan foundation connection detection device |
| CN115404894A (en) * | 2022-09-14 | 2022-11-29 | 中国石油大学(北京) | Single-pile-suction bucket wind power foundation and recovery method thereof |
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| CN103953059B (en) * | 2014-05-04 | 2016-04-27 | 中国能源建设集团云南省电力设计院有限公司 | Guy rope anchoring type offshore wind turbine foundation |
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| CN106649196B (en) * | 2016-11-30 | 2019-05-17 | 中国电建集团北京勘测设计研究院有限公司 | The local compression Method for Checking of wind driven generator base and foundation ring lower flange junction concrete |
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| CN109537621A (en) * | 2018-12-19 | 2019-03-29 | 天津大学 | A kind of combined type sea windward electricity bucket foundation |
| CN111456072A (en) * | 2019-01-18 | 2020-07-28 | 深圳国金电力新能设计院有限公司 | Center cylinder, tower cylinder foundation, construction method of tower cylinder foundation and tower cylinder |
| CN109914460A (en) * | 2019-02-27 | 2019-06-21 | 重庆大学 | A kind of novel suction cartridge type composite structure wind power foundation suitable for shallow sea |
| CN111910673A (en) * | 2020-08-11 | 2020-11-10 | 天津大学 | Assembled offshore wind power barrel type foundation |
| CN114411829A (en) * | 2022-01-25 | 2022-04-29 | 中国电建集团海南电力设计研究院有限公司 | Pile foundation and fan foundation connection detection device |
| CN114319417A (en) * | 2022-02-22 | 2022-04-12 | 重庆大学 | Barrel-shaped assembled wind power tower barrel foundation and construction method thereof |
| CN114319417B (en) * | 2022-02-22 | 2022-10-25 | 重庆大学 | Barrel-shaped assembled wind power tower barrel foundation and construction method thereof |
| CN115404894A (en) * | 2022-09-14 | 2022-11-29 | 中国石油大学(北京) | Single-pile-suction bucket wind power foundation and recovery method thereof |
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Application publication date: 20130814 |