CN107829444A - Wind turbines prestressing force foundation structure - Google Patents
Wind turbines prestressing force foundation structure Download PDFInfo
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- CN107829444A CN107829444A CN201711084812.9A CN201711084812A CN107829444A CN 107829444 A CN107829444 A CN 107829444A CN 201711084812 A CN201711084812 A CN 201711084812A CN 107829444 A CN107829444 A CN 107829444A
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- girder
- wind turbines
- foundation structure
- prestressing force
- important actor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
- E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/44—Foundations for machines, engines or ordnance
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a kind of Wind turbines prestressing force foundation structure, it is related to the foundation structure field of Wind turbines, solve large-scale wind electricity unit and use existing beam and slab type Wind turbines foundation structure, the ratio of reinforcement of girder substantially increases, not only increase cost, and bar spacing is small, it is unfavorable for constructing operation, the problem of influenceing structural concrete security.The technical solution adopted by the present invention is：Wind turbines prestressing force foundation structure, for beam and slab type, it is important actor including sole plate, in the middle part of sole plate, manhole is set in important actor, the girder of uniform divergent shape around important actor, prestressed cable is set to replace the vertical muscle of script in girder, foundation structure concrete is mainly prestressed concrete, and prestressed cable uses post- tension tensioning, by manhole, the service work that basis carries out prestressed cable can be entered.By introducing the theory of prestressed concrete, steel using amount is reduced, it is cost-effective, it is easy to construct, ensures pouring quality, and easy access.
Description
Technical field
The present invention relates to the foundation structure field of Wind turbines, specifically a kind of Wind turbines prestressing force foundation structure.
Background technology
At present, by land in wind power engineering widely used shallow embedding gravity type spread foundation, i.e., conventional mat foundation,
The type of foundation has the advantages of excavation of foundation pit is shallower, working procedure is less when constructing.To improve economy, conventional mat foundation
Structural shape be optimized for waffle-slab raft.Because waffle-slab raft concrete stress levels are higher, can more give full play to mixed
Native resistance to compression is coagulated, the ability of reinforcing bar tension, there is notable economic property.According to statistics, the same Wind turbines top knot of same engineering
Structure, using waffle-slab raft than the construction cost using conventional board-like base section about 10%, it is roughly equal to 10~150,000 yuan.
With the development of wind-powered electricity generation industry, Wind turbines develop towards high wheel hub, big impeller direction, Wind turbines and pylon conduct
Superstructure, the eccentric load increase being integrally subject to is more, causes substructure Wind turbines basis by bigger eccentric lotus
Carry.Required to meet that foundation structure calculates, the increase of the diameter of Wind turbines waffle-slab raft, bottom surface span and area have larger
Increase.To meet crack and deflection design requirement of the large span base concrete under limiting condition, the base concrete ratio of reinforcement
Increase.The increase of the above-mentioned ratio of reinforcement is only to meet that concrete cracking and amount of deflection control require, significantly adds engineering cost, and
And it is unfavorable for controlling construction quality.
As depicted in figs. 1 and 2, large-scale wind electricity unit uses existing beam and slab type Wind turbines foundation structure, sole plate 1
Middle part is cylindric, solid important actor 2, three-dimensional-structure outline based on the outward flange of sole plate 1, and connection is set in important actor 2
The crab-bolt cage of Wind turbines tower, the girder 5 of uniform divergent shape around important actor 2, the outside of two neighboring girder 5 is by edge girder
7 connections.It is hollow structure between two neighboring girder 5, carries out backfill processing during construction.For large-scale wind electricity unit, basic bottom
The diameter of plate 1 is up to 18~23m, a diameter of 5~6m of solid important actor 2, to meet large span base concrete in limiting condition
Under crack and deflection design requirement, the base concrete ratio of reinforcement increase 0.08t/m3~0.14t/m3.To meet to indulge in girder 5
The section force request of muscle 9, muscle 9 is indulged in girder 5 and is selectedReinforcing bar (HRB400), result of calculation shows：In Fig. 2, the width of girder 5
For 1100mm, a diameter of 5.4m of important actor 2, the vertical muscle 9 at the top of girder 5 includes：Upper row 14Reinforcing bar, middle row 14
Reinforcing bar, lower row 7Reinforcing bar；The vertical muscle 9 of the bottom of girder 5 includes：Upper row 7Reinforcing bar, lower row 11Reinforcing bar.Girder
5 topsReinforcing bar clear spacing is even up to 44mm.
Some following deficiency be present in above-mentioned design：Firstth, girder bar diameter is larger, and vertical muscle clear spacing is smaller, root
According to code requirement, beam upper reinforcement clear spacing is not less than 1.5d, i.e. 48mm；Beam lower rebar spacing is not less than d, i.e. 32mm.Can
To see, girder indulges that muscle is overstocked, and causing reinforcing bar to be difficult to, colligation is regular, concrete is difficult to vibration compacting, influences colligation and concreting,
It is unfavorable for ensureing the construction quality of foundation structure, has a strong impact on structure safety.Secondth, because foundation structure span is larger, by curved
Square effect is larger, and the increased purpose of the base concrete ratio of reinforcement, which is only that, meets that structural cracks and deflection deformation control require,
Due to increasing the reinforcing bar of a large amount of " unnecessary ", economically less calculate.3rd, structure reinforcing bars are not only overstocked, and model is more, unfavorable
In the guarantee project construction duration.
The content of the invention
The present invention provides a kind of Wind turbines prestressing force foundation structure, solves large-scale wind electricity unit and uses existing beam and slab type
Wind turbines foundation structure, to meet distress in concrete and deflection design requirement, the ratio of reinforcement of girder substantially increases, not only increased
Cost, and bar spacing is small, is unfavorable for constructing operation, the problem of influenceing structural concrete security.
The technical solution adopted for the present invention to solve the technical problems is：Wind turbines prestressing force foundation structure, it is beam slab
Formula, including sole plate, sole plate middle part is columned important actor, is provided for connecting the anchor of Wind turbines tower in important actor
Bolt cage, sets manhole in important actor, the girder of uniform divergent shape around important actor, and constructional reinforcement is set inside girder, two neighboring
The outside of girder is connected by edge girder, and mounting hole, mounting hole are set along girder between the outside of each girder and manhole
Interior setting prestressed cable.
It is further：Mounting hole in the girder is formed by metal bellows, sets steel to twist inside metal bellows
Line is as the prestressed cable.Specifically, the prestressed cable from the manhole of important actor to girder outside cloth diagonally downward
Put, one end that prestressed cable is located at manhole is fixing end, and one end on the outside of girder is stretching end.Specifically, it is each
A branch of prestressed cable is only set in girder.
Specifically, a diameter of 1000mm of the manhole.
The beneficial effects of the invention are as follows：Wind turbines prestressing force foundation structure, by Wind turbines basis important actor center originally
Solid concrete manhole is set, manhole is also used for prestressed cable wire, while prestressed cable is set in girder
Instead of the vertical muscle of script, girder inner region reinforcing bar is constructional reinforcement, and foundation structure concrete is mainly prestressed concrete, in advance should
Power cable wire uses post- tension tensioning, by the manhole on important actor, can enter the service work that basis carries out prestressed cable.
Because prestressed cable has the material property of high tensioning underrelaxation, compared to regular reinforcement (HRB400), by same
During Deng pulling force, prestressed cable is also smaller than the deformation that regular reinforcement occurs, and the arrangement of prestressed cable can be bunchy
Into stock flexible arrangement, not by effect of distance, the vertical muscle that can solve former scheme girder top it is overstocked and have a strong impact on reinforcing bar colligation,
The problem of concrete vibrating, ensure pouring quality.In addition, control of the prestressed concrete to malformation has greater advantage,
Prestressed cable is stretched to design load step by step after concrete strength reaches design requirement, and concrete is applied from girder both ends
Precompression, Member Lip is set not produce tension in the course of the work, so as to avoid concrete from producing cracking.
Wind turbines prestressing force foundation structure can ensure base concrete structure stress requirement, ensure crack, amount of deflection
On the premise of it is required that, the ratio of reinforcement of beam and slab type Wind turbines foundation structure is greatly reduced, reduces reinforcing bar cost, solves girder reinforcing bar
The problem of overstocked, girder is set to indulge muscle connection and reasonable arrangement, and constructing operation is simple, the easy vibration compacting of concreting, contributes to
Ensure the construction quality of concrete.The non-principal steel bar stress model of foundation structure presses constructional reinforcement, and main principal rod uses
Prestressed cable, reduction structure reinforcing bars model purpose is accomplished, has advantageously ensured that the construction period.
Brief description of the drawings
Fig. 1 is the horizontal layout schematic diagram that large-scale wind electricity unit uses existing beam and slab type Wind turbines foundation structure.
A-A profiles in Fig. 1 in Fig. 2.
Fig. 3 is the horizontal layout schematic diagram of Wind turbines prestressing force foundation structure of the present invention.
Fig. 4 is B-B profiles in Fig. 3.
Fig. 5 is C-C profiles in Fig. 4.Parts, position and numbering in figure：Sole plate 1, important actor 2, crab-bolt cage 3, inspection
Repair hole 4, girder 5, constructional reinforcement 6, edge girder 7, prestressed cable 8, vertical muscle 9, metal bellows 10.Chi in Fig. 1~5
For very little mark except indicating unit, other units are mm.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As seen in figures 3-5, Wind turbines prestressing force foundation structure of the present invention, is beam and slab type, including sole plate 1, basis
Bottom plate 1 is rounded, and the outward flange of sole plate 1 is basic build structure outline line, and the middle part of sole plate 1 is columned
Post 2, it is provided for connecting the crab-bolt cage 3 of the first section tower of Wind turbines in important actor 2, manhole 4, manhole 4 is set in important actor 2
Diameter can be entered with people and be advisable, such as a diameter of 1 meter, be easy to later stage worker to enter in the hollow structure of important actor 2 and examined
Repair work.The girder 5 of uniform divergent shape around important actor 2, the outside of two neighboring girder 5 is connected by edge girder 7, two neighboring
Area is emptied for triangle between girder 5, is backfilled after the completion of prestressing force foundation structure, each edge girder 7 is connected to form
Regular polygon.
Mounting hole is set along girder 5 between manhole 4 in the outside of each girder 5 and important actor 2, set in mounting hole pre-
Stress cable wire 8, one end that prestressed cable 8 is located at the outside of girder 5 is stretching end, and prestressed cable 8 is located at one in manhole 4
Hold as fixing end.Prestressed cable 8 in girder 5 is set according to result of calculation, prestressed cable 8 out of important actor 2 manhole 4 to
The outside of girder 5 is in tilted layout, as shown in Figure 4.Prestressed cable 8 replaces the vertical muscle 9 in former design, common in girder 5
Reinforcing bar is constructional reinforcement 6.Mounting hole is formed after girder 5 is poured, by setting metal bellows 10 to be formed in girder.
Prestressed cable 8 is prestress wire, and steel strand wires have the material property of high tensioning underrelaxation, can play it
The characteristic of high tensile.Specifically, a mounting hole is set in each girder 5, prestressed cable 8 is set in mounting hole, such as Fig. 5 institutes
Show.Prestressed cable 8 in girder 5 is set according to the stress envelope being calculated, and ensures compliance with section force request.In advance should
Power cable wire 8 can flexible arrangement, calculate the required section gross area and significantly reduce, that is, arrange that a small amount of prestressed cable 8 can expire
Sufficient structure stress requirement, is greatly reduced rolled steel dosage, cost-effective.Bar spacing is closed in Wind turbines prestressing force foundation structure
Reason, is easy to concreting, ensures the quality of concrete foundation.
Wind turbines prestressing force foundation structure introduces the theory of prestressed concrete, reduces steel using amount, cost-effective, just
In construction, ensure quality, and be easy to later stage repair and maintenance.
Claims (5)
1. Wind turbines prestressing force foundation structure, it is beam and slab type, including sole plate (1), sole plate (1) middle part are cylindric
Important actor (2), it is characterised in that：It is provided for connecting the crab-bolt cage (3) of Wind turbines tower in important actor (2), is set in important actor (2)
Put manhole (4), the girder (5) of uniform divergent shape around important actor (2) sets constructional reinforcement (6) inside girder (5), and adjacent two
The outside of individual girder (5) is connected by edge girder (7), along girder (5) between the outside of each girder (5) and manhole (4)
Mounting hole is set, prestressed cable (8) is set in mounting hole.
2. Wind turbines prestressing force foundation structure as claimed in claim 1, it is characterised in that：Installation in the girder (5)
Hole is formed by metal bellows (10), and steel strand wires are set inside metal bellows (10) as the prestressed cable (8).
3. Wind turbines prestressing force foundation structure as claimed in claim 1, it is characterised in that：The prestressed cable (8) from
The manhole (4) of important actor (2) arranges that prestressed cable (8) is located at one end of manhole (4) diagonally downward to girder (5) outside
For fixing end, one end on the outside of girder (5) is stretching end.
4. Wind turbines prestressing force foundation structure as claimed in claim 1, it is characterised in that：Only set in each girder (5)
A branch of prestressed cable (8).
5. Wind turbines prestressing force foundation structure as claimed in claim 1, it is characterised in that：The diameter of the manhole (4)
For 1000mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711084812.9A CN107829444B (en) | 2017-11-07 | 2017-11-07 | Wind turbine generator system prestressing force foundation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711084812.9A CN107829444B (en) | 2017-11-07 | 2017-11-07 | Wind turbine generator system prestressing force foundation structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107829444A true CN107829444A (en) | 2018-03-23 |
| CN107829444B CN107829444B (en) | 2020-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711084812.9A Active CN107829444B (en) | 2017-11-07 | 2017-11-07 | Wind turbine generator system prestressing force foundation structure |
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| CN (1) | CN107829444B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT522250A1 (en) * | 2019-02-28 | 2020-09-15 | Holcim Technology Ltd | Foundation for a wind turbine |
| CN113089738A (en) * | 2021-03-30 | 2021-07-09 | 中国电建集团成都勘测设计研究院有限公司 | Method for repairing pre-stressed anchor bolt foundation of tower cylinder of installed fan |
| CN113756357A (en) * | 2021-08-10 | 2021-12-07 | 山东电力工程咨询院有限公司 | Assembly type plate foundation adopting hollow bottom plate and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205369295U (en) * | 2016-01-29 | 2016-07-06 | 惠宏工程技术（北京）有限公司 | Basis precast prestressed beam slab formula wind power generation column foot plinth |
| CN106121931A (en) * | 2016-08-30 | 2016-11-16 | 中国电建集团西北勘测设计研究院有限公司 | A kind of replaceable prestress anchorage cable blower foundation for high-power wind turbine unit |
| CN207376640U (en) * | 2017-11-07 | 2018-05-18 | 中国电建集团成都勘测设计研究院有限公司 | Wind turbines prestressing force foundation structure |
-
2017
- 2017-11-07 CN CN201711084812.9A patent/CN107829444B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205369295U (en) * | 2016-01-29 | 2016-07-06 | 惠宏工程技术（北京）有限公司 | Basis precast prestressed beam slab formula wind power generation column foot plinth |
| CN106121931A (en) * | 2016-08-30 | 2016-11-16 | 中国电建集团西北勘测设计研究院有限公司 | A kind of replaceable prestress anchorage cable blower foundation for high-power wind turbine unit |
| CN207376640U (en) * | 2017-11-07 | 2018-05-18 | 中国电建集团成都勘测设计研究院有限公司 | Wind turbines prestressing force foundation structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT522250A1 (en) * | 2019-02-28 | 2020-09-15 | Holcim Technology Ltd | Foundation for a wind turbine |
| CN113089738A (en) * | 2021-03-30 | 2021-07-09 | 中国电建集团成都勘测设计研究院有限公司 | Method for repairing pre-stressed anchor bolt foundation of tower cylinder of installed fan |
| CN113756357A (en) * | 2021-08-10 | 2021-12-07 | 山东电力工程咨询院有限公司 | Assembly type plate foundation adopting hollow bottom plate and method |
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| Publication number | Publication date |
|---|---|
| CN107829444B (en) | 2020-05-26 |
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