CN111379669A - Reinforcing device and reinforcing method for concrete table column of fan foundation - Google Patents
Reinforcing device and reinforcing method for concrete table column of fan foundation Download PDFInfo
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- CN111379669A CN111379669A CN202010210977.1A CN202010210977A CN111379669A CN 111379669 A CN111379669 A CN 111379669A CN 202010210977 A CN202010210977 A CN 202010210977A CN 111379669 A CN111379669 A CN 111379669A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/22—Foundations specially adapted for wind motors
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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
- E02D27/44—Foundations for machines, engines or ordnance
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
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- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Chemical & Material Sciences (AREA)
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- Mechanical Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a reinforcing device for a concrete platform column of a fan foundation, and belongs to the field of fan foundation reinforcement. This reinforcing apparatus is including setting up the split type steel ring in concrete column periphery, and split type steel ring includes two at least segmental arcs, through flange and bolt-up connection between two liang of adjacent segmental arcs, and confined pressure formation is consolidated to the column outside to the steel ring that fastening connection is in the same place. The inner radius of the steel ring is slightly smaller than the outer radius of the column, and the height of the steel ring is equal to the height of the column. Also discloses a method for reinforcing the concrete column of the wind turbine foundation. According to the invention, the confining pressure loading of the concrete column is carried out through the split type steel ring, the hoop tensile stress in the concrete column is effectively reduced, the generation and the expansion of the column crack are effectively inhibited, the bonding performance of the reinforcing steel bar and the concrete can be enhanced, the problems of easy crack and slurry leakage of the concrete column are thoroughly solved, and the reliable guarantee is provided for the normal operation of the fan. The reinforcement method does not need to damage the existing fan foundation structure, is efficient in construction, and saves labor and time cost.
Description
Technical Field
The invention relates to the technical field of fan foundation reinforcement, in particular to a reinforcement device and a reinforcement method for a concrete column of a fan foundation.
Background
The foundation form of the land wind power generator can be basically divided into a foundation ring type and a pre-pulling anchor bolt type, and the two structures comprise concrete columns arranged outside the foundation ring or the pre-pulling anchor bolt, the concrete columns have the problems that the concrete of ① columns is easy to crack, gaps are generated between the foundation ring or the anchor bolt and the concrete, the larger the gaps are, the damage to the foundation concrete caused by the dynamic load of the running of a fan is stronger, the waterproof seal of the columns is damaged when the upper surface of the concrete is damaged ②, rainwater seeps down along the side surface of the foundation ring and is mixed with ground concrete to form mortar, the 'water return and slurry leakage' is caused, the damage process of the concrete is accelerated in an indirect mode, and the peripheral part of the ③ foundation ring is easy to be sheared by reinforcing steel bars, so that the bonding property between the foundation ring and the concrete is reduced.
At present, the problems of cracks, slurry leakage and the like of a fan foundation are mainly treated by grouting reinforcement treatment, but the reinforcement method is not a permanent cure, and the problems of concrete cracks, slurry leakage and the like can still reappear after a period of time.
Therefore, the problems of concrete cracks, slurry bleeding and the like exist in the existing wind turbine foundation concrete platform column. Aiming at the problems, the reinforcing device and the reinforcing method for the concrete table post of the wind turbine foundation are created, so that the problems that the concrete table post is easy to crack and cause slurry leakage are fundamentally solved, the wind turbine foundation is thoroughly reinforced, the reliable guarantee is provided for the normal operation of the wind turbine generator system, and the reinforcing device and the reinforcing method become the targets which are greatly required to be improved in the current industry.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a reinforcing device for a concrete table post of a wind turbine foundation, which fundamentally solves the problems of easy cracking and slurry leakage of the concrete table post, thoroughly reinforces the wind turbine foundation, and provides reliable guarantee for normal operation of a wind turbine generator set, thereby overcoming the defects of the existing wind turbine foundation.
In order to solve the technical problem, the invention provides a reinforcing device for a concrete column of a fan foundation, which comprises a split steel ring arranged on the periphery of the concrete column, wherein the split steel ring comprises at least two arc sections, every two adjacent arc sections are fastened and connected through a flange and a bolt, and the fastened and connected steel rings apply confining pressure to the outer side of the concrete column to form reinforcement.
The split type steel ring is further improved, the inner radius of the split type steel ring is slightly smaller than the outer radius of the concrete column, and the height of the split type steel ring is equal to that of the concrete column.
Further improvement, the thickness t of the split type steel ring should satisfy:
wherein t is the thickness of the steel ring, P is confining pressure applied to the concrete column by the steel ring, R is the radius of the concrete column of the wind turbine foundation, fyThe design value is the tensile strength of the steel ring.
Further improvement, the inner radius r of the split type steel ring is as follows:
wherein R is the inner radius of the steel ring, R is the radius of the concrete column of the wind turbine foundation, E is the elastic modulus of the steel ring, t is the thickness of the steel ring, and P is the confining pressure applied to the concrete column by the steel ring.
Further improve, the bolt quantity n between two pairwise adjacent arc sections is:
wherein n is the number of bolts, and is an integer, P is confining pressure applied to the concrete column by the steel ring, R is the radius of the concrete column of the fan foundation, l is the height of the concrete column of the fan foundation, m is the radius of the bolt, fScrew threadThe tensile strength of the bolt.
The invention also provides a reinforcement method of the concrete column of the fan foundation, which comprises the following steps: concrete column periphery sets up split type steel ring, split type steel ring includes two at least segmental arcs, and through flange and bolt fastening connection between two liang of adjacent segmental arcs, the steel ring that fastening connection is in the same place is right concrete column outside is applyed the confined pressure, and it is right to form the reinforcement of concrete column.
The split type steel ring is further improved, the inner radius of the split type steel ring is slightly smaller than the outer radius of the concrete column, and the height of the split type steel ring is equal to that of the concrete column.
Further improvement, the thickness t of the split type steel ring should satisfy:
wherein t is the thickness of the steel ring, P is confining pressure applied to the concrete column by the steel ring, R is the radius of the concrete column of the wind turbine foundation, fyThe design value is the tensile strength of the steel ring.
Further improvement, the inner radius r of the split type steel ring is as follows:
wherein R is the inner radius of the steel ring, R is the radius of the concrete column of the wind turbine foundation, E is the elastic modulus of the steel ring, t is the thickness of the steel ring, and P is the confining pressure applied to the concrete column by the steel ring.
Further improve, the bolt quantity n between two pairwise adjacent arc sections is:
wherein n is the number of bolts, and is an integer, P is confining pressure applied to the concrete column by the steel ring, R is the radius of the concrete column of the fan foundation, l is the height of the concrete column of the fan foundation, m is the radius of the bolt, fScrew threadThe tensile strength of the bolt.
After adopting such design, the invention has at least the following advantages:
according to the reinforcing device, the confining pressure of the concrete column is loaded through the split type steel ring, the annular tensile stress in the concrete column can be effectively reduced, the generation and the expansion of cracks of the concrete column are effectively inhibited, meanwhile, the bonding performance of reinforcing steel bars and concrete can be enhanced, the problems that the concrete column is easy to crack and seep are thoroughly solved, and the fan foundation is thoroughly reinforced. And this reinforcing apparatus need not the original structure of disturbance destruction current fan basis, and the construction is high-efficient, uses manpower sparingly and the time cost.
The reinforcing device provided by the invention has the advantages that the inner radius of the split type steel ring is slightly smaller than the outer radius of the concrete column, so that the better confining pressure can be applied to the concrete column, and a good reinforcing effect is achieved. Still highly being equal to the height of concrete column stage through setting up split type steel ring, form the steel ring and exert pressure to the whole week of column stage, make the reinforcement effect better.
The reinforcement method is simple and efficient, is convenient to construct, does not need to destroy the original structure of the existing wind turbine foundation, saves time and labor, fundamentally solves the problems that the concrete table post is easy to crack and bleed, thoroughly reinforces the wind turbine foundation and provides reliable guarantee for the normal operation of the wind turbine generator.
Drawings
The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description.
FIG. 1 is a schematic (side view) view of the method for reinforcing a concrete column of a wind turbine foundation according to the present invention.
Fig. 2 is a schematic (overhead) view of the method for reinforcing the concrete column of the wind turbine foundation according to the present invention.
Fig. 3 is a schematic structural diagram of a reinforcing device steel ring of the concrete column of the wind turbine foundation.
Fig. 4 is a schematic diagram of the structural design of the steel ring of the present invention.
Detailed Description
According to the invention, a certain amount of confining pressure P is applied to the outer side of the concrete column of the fan foundation, as shown in the attached figures 1 and 2, the circumferential tensile stress in the concrete column can be effectively reduced, the generation and expansion of cracks of the concrete column can be effectively inhibited, and meanwhile, the bonding performance of concrete and internal reinforcing steel bars can be enhanced. Examples of specific reinforcing means for applying confining pressure are described below.
Referring to fig. 3 and 4, the reinforcing apparatus for a concrete column of a wind turbine foundation in this embodiment includes a split steel ring 2 disposed at the periphery of the concrete column 1, and the split steel ring 2 includes at least two arc-shaped sections.
In this embodiment, the split-type steel ring 2 includes two semicircular arc sections 21 and 22, the two semicircular arc sections are fastened and connected through a flange 23 and a high-strength bolt, and the fastened and connected steel ring applies confining pressure p to the outer side of the concrete column 1 to reinforce the concrete column 1.
This split type steel ring 2's inner radius R is about slightly to be less than this concrete column 1's outer radius R, when reinforcement construction like this, through constantly screwing up the bolt, the inner radius value of steel ring is R by the R grow, and 2 inside production hoop tensile stress of steel ring this moment, exert the confining pressure to concrete column 1 then, realize that steel ring 2 plays good strengthening effect to the better confining pressure of applying of concrete column 1. In addition, the height of the split type steel ring 2 is equal to that of the concrete column 1, so that the steel ring is formed to apply pressure to the whole circumference of the column, and the reinforcing effect is better.
Each item parameter of this split type steel ring 2 influences the effect of exerting pressure great in this application, and wherein the thickness t of steel ring, inside radius r and fastening bolt's quantity n should satisfy following condition:
① the thickness t of the split steel ring should satisfy the following formula (1):
wherein t is the thickness of the steel ring, P is confining pressure applied to the concrete column by the steel ring, R is the radius of the concrete column of the wind turbine foundation, fyThe design value is the tensile strength of the steel ring.
The formula (1) is derived from the formula (2), and the formula (2) is:
wherein f is the tensile stress of the steel ring, P, R, t, fyThe meaning is the same as above.
② the inner radius r of the split steel ring is given by the following formula (3):
wherein R is the inner radius of the steel ring, R is the radius of the concrete column of the wind turbine foundation, E is the elastic modulus of the steel ring, t is the thickness of the steel ring, and P is the confining pressure applied to the concrete column by the steel ring.
The derivation process of the equation (3) is:
the steel ring thickness t is determined by the ① steps and is regarded as a known condition.
The hoop strain value epsilon of the steel ring is as follows:
the hoop stress σ of the steel ring is:
because the stress strain conforms to the relationship:
σ＝Eε (6)
the combination of vertical (4), (5) and (6) can obtain formula (3):
③ the number of bolts n between two adjacent arc segments is the following formula (7):
wherein n is the number of bolts, and is an integer, P is confining pressure applied to the concrete column by the steel ring, R is the radius of the concrete column of the fan foundation, l is the height of the concrete column of the fan foundation, m is the radius of the bolt, fScrew threadThe tensile strength of the bolt.
The formula (7) is derived from a force balance formula (8) which needs to be satisfied at the joint of the two semicircular rings, and the formula (8) is as follows:
Rpl≤nπm2fscrew thread(8)
The method for reinforcing the concrete column of the wind turbine foundation comprises the following steps: set up foretell split type steel ring 2 in concrete column 1 periphery, this split type steel ring 2 includes two at least segmental arcs, through flange and high strength bolt fastening connection between two liang of adjacent segmental arcs, and confined pressure is applyed to this concrete column outside to the steel ring that fastening connection is in the same place, forms the reinforcement to fan foundation concrete column.
Wherein, structural feature and the design requirement of this split type steel ring are all the same above, reach the purpose of exerting the confined pressure through constantly screwing up high strength bolt in the installation, have consolidated the fan basis.
The reinforcing device does not need to disturb and destroy the original structure of the existing fan foundation, is efficient in construction, and saves labor and time cost.
According to the invention, by loading confining pressure of the reinforced steel ring on the concrete column, the hoop tensile stress in the concrete column can be effectively reduced, the generation and expansion of cracks of the concrete column can be effectively inhibited, and meanwhile, the bonding performance of the steel bar and the concrete can be enhanced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention in any way, and it will be apparent to those skilled in the art that the above description of the present invention can be applied to various modifications, equivalent variations or modifications without departing from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a reinforcing apparatus of fan foundation concrete column, its characterized in that is in including setting up the split type steel ring of concrete column periphery, split type steel ring includes two at least segmental arcs, through flange and bolt fastening connection between two liang of adjacent segmental arcs, and the steel ring that fastening connection is in the same place is right the concrete column outside is applyed the confined pressure and is formed the reinforcement.
2. The reinforcement device of the concrete column of the wind turbine foundation as claimed in claim 1, wherein the inner radius of the split steel ring is slightly smaller than the outer radius of the concrete column, and the height of the split steel ring is equal to the height of the concrete column.
3. The reinforcement device of the concrete column of the wind turbine foundation as claimed in claim 2, wherein the thickness t of the split steel ring is such that:
wherein t is the thickness of the steel ring, P is confining pressure applied to the concrete column by the steel ring, R is the radius of the concrete column of the wind turbine foundation, fyThe design value is the tensile strength of the steel ring.
4. The reinforcing apparatus of wind turbine foundation concrete column according to claim 3, wherein the inner radius r of the split steel ring is:
wherein R is the inner radius of the steel ring, R is the radius of the concrete column of the wind turbine foundation, E is the elastic modulus of the steel ring, t is the thickness of the steel ring, and P is the confining pressure applied to the concrete column by the steel ring.
5. The reinforcement device of a wind turbine foundation concrete column according to claim 4, wherein the number n of bolts between every two adjacent arc-shaped sections is:
wherein n is the number of bolts, and is an integer, P is confining pressure applied to the concrete column by the steel ring, R is the radius of the concrete column of the fan foundation, l is the height of the concrete column of the fan foundation, m is the radius of the bolt, fScrew threadThe tensile strength of the bolt.
6. A method for reinforcing a concrete column of a fan foundation is characterized by comprising the following steps: concrete column periphery sets up split type steel ring, split type steel ring includes two at least segmental arcs, and through flange and bolt fastening connection between two liang of adjacent segmental arcs, the steel ring that fastening connection is in the same place is right concrete column outside is applyed the confined pressure, and it is right to form the reinforcement of concrete column.
7. The method for reinforcing the concrete column of the wind turbine foundation according to claim 6, wherein the inner radius of the split steel ring is slightly smaller than the outer radius of the concrete column, and the height of the split steel ring is equal to the height of the concrete column.
8. The method for reinforcing the concrete column of the wind turbine foundation according to claim 7, wherein the thickness t of the split steel ring satisfies the following requirement:
wherein t is the thickness of the steel ring, P is confining pressure applied to the concrete column by the steel ring, R is the radius of the concrete column of the wind turbine foundation, fyThe design value is the tensile strength of the steel ring.
9. The method for reinforcing the concrete column of the wind turbine foundation according to claim 8, wherein the inner radius r of the split steel ring is as follows:
wherein R is the inner radius of the steel ring, R is the radius of the concrete column of the wind turbine foundation, E is the elastic modulus of the steel ring, t is the thickness of the steel ring, and P is the confining pressure applied to the concrete column by the steel ring.
10. The method for reinforcing the concrete column for the wind turbine foundation according to claim 9, wherein the number n of bolts between every two adjacent arc-shaped sections is:
wherein n is the number of bolts, and is an integer, P is confining pressure applied to the concrete column by the steel ring, R is the radius of the concrete column of the fan foundation, l is the height of the concrete column of the fan foundation, m is the radius of the bolt, fScrew threadThe tensile strength of the bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010210977.1A CN111379669A (en) | 2020-03-24 | 2020-03-24 | Reinforcing device and reinforcing method for concrete table column of fan foundation |
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| CN202010210977.1A CN111379669A (en) | 2020-03-24 | 2020-03-24 | Reinforcing device and reinforcing method for concrete table column of fan foundation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115573376A (en) * | 2022-08-12 | 2023-01-06 | 中国电力工程顾问集团西南电力设计院有限公司 | Treatment method and reinforcement device for circular transmission tower foundation cracking |
| CN115596031A (en) * | 2022-08-12 | 2023-01-13 | 中国电力工程顾问集团西南电力设计院有限公司（Cn） | Reinforcing method for local fracturing of square concrete foundation of power transmission line |
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| KR100590120B1 (en) * | 2006-03-31 | 2006-06-19 | 주식회사 한국종합기술 | Apparatus protection digging using bridge |
| GB2451191B (en) * | 2007-07-18 | 2013-03-27 | Peter Ronald Chambers | Mountings |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115573376A (en) * | 2022-08-12 | 2023-01-06 | 中国电力工程顾问集团西南电力设计院有限公司 | Treatment method and reinforcement device for circular transmission tower foundation cracking |
| CN115596031A (en) * | 2022-08-12 | 2023-01-13 | 中国电力工程顾问集团西南电力设计院有限公司（Cn） | Reinforcing method for local fracturing of square concrete foundation of power transmission line |
| CN115573376B (en) * | 2022-08-12 | 2024-05-24 | 中国电力工程顾问集团西南电力设计院有限公司 | Method for treating cracking of foundation of circular transmission tower |
| CN115596031B (en) * | 2022-08-12 | 2024-08-02 | 中国电力工程顾问集团西南电力设计院有限公司 | Reinforcing method for partial fracturing of square concrete foundation of power transmission line |
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Application publication date: 20200707 |