CN203256765U - Pre-stressed concrete cylindrical foundation with inclined supports - Google Patents
Pre-stressed concrete cylindrical foundation with inclined supports Download PDFInfo
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- CN203256765U CN203256765U CN 201320255241 CN201320255241U CN203256765U CN 203256765 U CN203256765 U CN 203256765U CN 201320255241 CN201320255241 CN 201320255241 CN 201320255241 U CN201320255241 U CN 201320255241U CN 203256765 U CN203256765 U CN 203256765U
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Abstract
The utility model discloses a pre-stressed concrete cylindrical foundation with inclined supports. The pre-stressed concrete cylindrical foundation is composed of a concrete cylindrical foundation body, the concrete inclined supports, a concrete transition section and pres-stressed steel bars. A top cover of the concrete cylindrical foundation body, the concrete inclined supports and the concrete transition section are poured into a whole, and the concrete transition section is a hollow cylinder, wherein the diameter and the thickness of the concrete transition section have linear changes from top to bottom. The pre-stressed steel bars are evenly arranged in the wall of the transition tower section along the annulus. The inclined supports are evenly arranged at the bottom of the transition section in a radial mode, and the inclined pre-stressed steel bars are arranged inside the inclined supports. Flange plates are embedded in the top of the transition section, and the transition section is connected with a wind machine tower cylinder through the flange plates. According to the structure, the stress condition of the structure itself can be improved so that cracks can not be generated in the processes of construction and running, durability and stability of the structure are improved, the improved structure is simple, the construction is convenient, and an application range is wide.
Description
Technical field
The utility model belongs to the foundation structure field in offshore wind farm, harbour, ocean and the hydraulic engineering, more particularly, relates 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 at present more offshore wind turbine foundation 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 by land prefabricatedly, haul is convenient to peace and transportation to the building site again; The cylinder base directly inserts in the shallow layer foundation, and it goes without doing, and ground is processed, 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 study hotspot in recent years.But it is large that local stress often all appears in existing steel concrete cartridge type foundation structure, the problems such as construction is complicated, 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, the destruction that finally causes whole blower fan structure to the inside configuration reinforcing bar.
The utility model content
The utility model 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 and the stability of structure, and structure-improved is simple, and easy construction is applied widely.
Technical purpose of the present utility model is achieved by following technical proposals.
A kind of prestressed concrete cylindrical basis with bearing diagonal is comprised of bucket foundation, bearing diagonal and basic transition tower cylinder 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, take basic transition tower cylinder section as the center of circle, be radially evenly distribution, arrange radical (quantity) according to actual conditions, 10-16 (individual) all can; Basis transition tower cylinder section is prestressed reinforced concrete construction, wherein be provided with prestressed reinforcement, the external diameter of described basic transition tower cylinder 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 cylinder, and its lower end and steel concrete cartridge type are basic, bearing diagonal waters is an integral body.
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 cylinder 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 cylinder 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 cylinder 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 Distances Between Neighboring Edge Points.
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 Distances Between Neighboring Edge Points.
The prestressed reinforcement spacing 0.5-1.2m that arranges on the described bucket foundation top cover, preferred distance 1-1.2m, two-layer layout about minute is arranged 25-50 bundles for every layer, arranges 25-30 bundles for preferred every layer, its end is anchored at the barrel periphery by ground tackle with prestressed reinforcement.
The utility model 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 cylinder 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 and the durability of structure.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; The Prestressing bearing diagonal is better than the mode of transfer force of Prestressing beam 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 utility model can be prefabricated on land, utilizes the cavity of structure self, minute 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, greatly reduce freight and construction cost, and this structure recoverable also.Bearing diagonal, the ingehious 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, greatly reduces material usage, safety economy.
Description of drawings
Fig. 1 is the prestressed concrete cylindrical basis generalized section of the utility model band bearing diagonal.
Fig. 2 is the prestressed concrete cylindrical basis schematic top plan view of the utility model band bearing diagonal.
Wherein 1 is bucket foundation; 2 is basic transition tower cylinder section; 3 is bearing diagonal; 4 is flange; 5 is prestressed reinforcement; 6 is generating set tower cylinder.
The specific embodiment
Further specify the technical solution of the utility model 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 comprised of bucket foundation 1, bearing diagonal 3 and basic transition tower cylinder 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, take basic transition tower cylinder section 2 as the center of circle, is radially and evenly distributes; Basis transition tower cylinder 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 cylinder 6, it is an integral body that its lower end and steel concrete cartridge type basis 1, bearing diagonal 3 water.
Take the bucket foundation of 3MW offshore wind turbine as example, 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 cylinder 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 cylinder section, along the circumferential direction are evenly arranged, 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 up and down two-layer layout, arranges 29 bundles for every layer, and every bundle presstressed reinforcing steel produces 104t pressure, and ground tackle is passed through in the end, and Bar Anchorage is peripheral at barrel.Above prestressed reinforcement interfascicular, center distance are 250mm-300mm, are not less than 50mm apart from the member Distances Between Neighboring Edge Points.
Under the 3MW Ultimate Loads, the concrete maximum crushing stress is 21.6MPa, less than concrete axle center compressive strength design load 27.5MPa; Maximum tension stress is 2.17MPa, is a bit larger tham concrete axle center 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 cylinder base, from bottom to top, by fixing reinforcing cage, the then concreting built of grinding tool; 2) need the position of stretch-draw prestressing force should reserve in the steel concrete position presstressed reinforcing steel hole, 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 is complete, use the work ground tackle with the two ends of Bar Anchorage at member; 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 set tower drum is installed on the bucket foundation; 5) by special towage ship, mounted whole blower fan structure is checked the construction destination.
More than the utility model has been done exemplary description; should be noted that; in the situation that does not break away from core of the present utility model, 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 domain of the present utility model.
Claims (9)
1. the prestressed concrete cylindrical with bearing diagonal is basic, it is characterized in that, be comprised of bucket foundation, bearing diagonal and basic transition tower cylinder 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, take basic transition tower cylinder section as the center of circle, is radially evenly distribution; Described basic transition tower cylinder section is prestressed reinforced concrete construction, wherein is provided with prestressed reinforcement, the external diameter of described basic transition tower cylinder section and wall thickness by the upper end down end line increase progressively; The upper end of described basic transition tower cylinder section is connected and fixed by flange and generating set tower cylinder, and the lower end of described basic transition tower cylinder section and steel concrete cartridge type are basic, bearing diagonal waters is an integral body.
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 with bearing diagonal according to claim 1 is basic, it is characterized in that, the prestressed reinforcement spacing 0.5-1.2m that arranges on the described bucket foundation top cover, two-layer layout about minute, 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, and two-layer layout about minute is arranged 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 Distances Between Neighboring Edge Points; 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 cylinder 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 cylinder 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 Distances Between Neighboring Edge Points.
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 cylinder 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 cylinder section, prestressed reinforcement divides two circles to arrange, each preferred 20-25 bundle, the preferred 250mm-300mm of two bundle prestressed reinforcement center distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320255241 CN203256765U (en) | 2013-05-11 | 2013-05-11 | Pre-stressed concrete cylindrical foundation with inclined supports |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320255241 CN203256765U (en) | 2013-05-11 | 2013-05-11 | Pre-stressed concrete cylindrical foundation with inclined supports |
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| Publication Number | Publication Date |
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| CN203256765U true CN203256765U (en) | 2013-10-30 |
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| CN 201320255241 Expired - Lifetime CN203256765U (en) | 2013-05-11 | 2013-05-11 | Pre-stressed concrete cylindrical foundation with inclined supports |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243735A (en) * | 2013-05-11 | 2013-08-14 | 天津大学 | Prestressed concrete cylindrical foundation with oblique supports |
| CN107907256A (en) * | 2017-11-08 | 2018-04-13 | 山东华建仓储装备科技有限公司 | A kind of method that large warehoused equipment is made of prestress wire |
-
2013
- 2013-05-11 CN CN 201320255241 patent/CN203256765U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243735A (en) * | 2013-05-11 | 2013-08-14 | 天津大学 | Prestressed concrete cylindrical foundation with oblique supports |
| CN107907256A (en) * | 2017-11-08 | 2018-04-13 | 山东华建仓储装备科技有限公司 | A kind of method that large warehoused equipment is made of prestress wire |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131030 |