CN110735444A - vertical anchor self-protection type fan foundation and construction method thereof - Google Patents
vertical anchor self-protection type fan foundation and construction method thereof Download PDFInfo
- Publication number
- CN110735444A CN110735444A CN201910985922.5A CN201910985922A CN110735444A CN 110735444 A CN110735444 A CN 110735444A CN 201910985922 A CN201910985922 A CN 201910985922A CN 110735444 A CN110735444 A CN 110735444A
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- anchor
- concrete
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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
Abstract
The invention discloses vertical anchor self-protection type fan foundation and a construction method thereof, and the method comprises the following steps of S1, arranging an anchor bolt fixing plate connected with a foundation ring on the outer periphery of the foundation ring, S2, arranging an embedded die pipe on the outer periphery of the foundation ring in the vertical direction, connecting the foundation ring with the embedded die pipe by using a fastening sleeve penetrating through a mounting hole, S3, hoisting the foundation ring and binding a metal cage structure around the foundation ring, S4, arranging an anchor bolt in the embedded die pipe in the vertical direction, connecting the upper end of the anchor bolt with the anchor bolt fixing plate, S5, pouring concrete outside the embedded die pipe, pouring second concrete in the embedded die pipe, and S6, when concrete and the second concrete reach preset strength, generating pretension in the anchor bolt.
Description
Technical Field
The invention relates to the technical field of fan foundations, in particular to vertical anchor self-protection type fan foundations and a construction method thereof.
Background
wind generating sets generally include upper, middle and lower three parts, which are the upper cabin, blades, middle steel tower and lower reinforced concrete foundation, the connection between the steel tower and the reinforced concrete foundation has various forms, wherein the connection between the foundation ring is the main connection form of wind turbine foundations, the steel foundation ring is fixed and leveled in advance before concrete pouring, and after concrete pouring and curing, the steel foundation ring is connected with the upper tower through bolts.
Disclosure of Invention
() problems to be solved
Based on the technical scheme, the invention provides vertical anchor self-protection type fan foundations and a construction method thereof, and aims to solve the technical problems that in the prior art, the fan foundations are poor in stability and prone to causing shutdown of a wind driven generator.
(II) technical scheme
In order to solve the technical problem, the invention provides a construction method of vertical anchor self-protection type fan foundations, wherein the construction method comprises the following steps:
s1, arranging an anchor bolt fixing plate connected with the foundation ring on the outer periphery side of the foundation ring, wherein the foundation ring is provided with a plurality of mounting holes at positions below the anchor bolt fixing plate, and the mounting holes are arranged at intervals from top to bottom along the axial direction of the foundation ring;
s2, placing the embedded die pipe on the outer periphery of the foundation ring along the vertical direction, and connecting the foundation ring with the embedded die pipe by using a fastening suite penetrating through the mounting hole;
s3, hoisting the foundation ring, and binding a metal cage structure around the foundation ring;
s4, placing an anchor rod in the embedded die pipe along the vertical direction, connecting the upper end of the anchor rod with the anchor rod fixing plate, and suspending the lower end of the anchor rod;
s5, pouring th concrete outside the embedded die pipe, and pouring second concrete in the embedded die pipe;
and S6, when the th concrete and the second concrete reach the preset strength, enabling the anchor rod to generate pretension.
Preferably, the construction method of the vertical anchor self-protection fan foundation comprises the step of connecting the upper end of the anchor rod with the anchor rod fixing plate through a necking plate in the step S4, wherein the necking plate is connected with the anchor rod fixing plate through a threaded fastener, and the necking plate is connected with the upper end of the anchor rod through a second threaded fastener.
Preferably, the construction method of the vertical anchor self-protection type fan foundation comprises the following steps: a low ductility metal material is used as the necking plate.
Preferably, the construction method of the vertical anchor self-protection type fan foundation comprises the following steps: the brittle fracture strength of the necking plate is set to be lower than the limit strength of the bolt fatigue failure.
Preferably, the construction method of the vertical anchor self-protection type fan foundation comprises the following steps: in step S6, a pretension is generated in the anchor rod by pretensioning the anchor bolt fastening plate against the necking plate.
Preferably, the construction method of the vertical anchor self-protection type fan foundation comprises the step of taking common concrete as the th concrete and taking ultra-high performance concrete as the second concrete.
In addition, the invention also provides vertical anchor self-protection type fan foundations, wherein the vertical anchor self-protection type fan foundations are manufactured by the construction method of the vertical anchor self-protection type fan foundations.
In addition, the invention also provides vertical anchor self-protection type fan foundations, wherein each vertical anchor self-protection type fan foundation comprises th concrete, a foundation ring arranged in the th concrete, a metal cage structure, an embedded mold pipe and anchor rods in the embedded mold pipe, the embedded mold pipes and the anchor rods are arranged from top to bottom in the vertical direction, an anchor rod fixing plate is connected to the outer peripheral side of the foundation ring, the upper ends of the anchor rods are connected with the anchor rod fixing plate, second concrete is arranged in the embedded mold pipes, and the middle sections and the lower ends of the anchor rods are arranged in the second concrete.
Preferably, the upper end of the anchor rod is connected with the anchor bolt fixing plate through a necking plate.
Preferably, the breakneck strength of the necking plate is lower than the threshold strength of the bolt fatigue failure.
(III) advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
because the construction method of the vertical anchor self-protection type fan foundation comprises the steps, the ultra-high performance concrete can be used as the second concrete, and the ultra-high performance concrete has excellent durability and fatigue resistance, the anchor rod, the anchor bolt fixing plate and the foundation ring can work together for a long time, the stress concentration condition of the concrete around the flange under the foundation ring is greatly reduced, and the fatigue damage of the concrete around the foundation ring can be effectively avoided.
Other advantageous effects of the present invention will be described in the following detailed description.
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and not to be construed as limiting the invention in any way, and in which:
FIG. 1 is a general schematic view of a vertical anchor self-protecting wind turbine foundation of the present invention;
FIG. 2 is a partial top view of the vertical anchor self-protecting wind turbine foundation of the present invention;
FIG. 3 is a schematic outboard view of the foundation ring of the present invention;
FIG. 4 is a top view of the pre-buried mold pipe of the present invention;
FIG. 5 is a side view of an insert mold tube of the present invention;
FIG. 6 is a top view of the anchor fixing plate of the present invention;
fig. 7 is a side view of the anchor fixing plate of the present invention.
Description of reference numerals:
1. the anchor bolt fixing plate comprises a foundation ring, 2, an anchor bolt fixing plate, 3, an th mounting hole, 4, an embedded die pipe, 5, a metal cage structure, 6, a necking plate, 7, a screw rod, 8, a nut, 9, a th threaded fastener, 10, a second threaded fastener, 11, an anchor bolt, 12, th concrete, 13, second concrete, 14 and a pouring hole.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Referring to fig. 1-3, the invention discloses a construction method of vertical anchor self-protection type fan foundations, wherein the construction method comprises the following steps:
s1, arranging an anchor bolt fixing plate 2 connected with a foundation ring 1 on the outer periphery of the foundation ring 1, wherein the foundation ring 1 is provided with a plurality of mounting holes 3 at positions below the anchor bolt fixing plate 2, and the mounting holes 3 are arranged at intervals from top to bottom along the axial direction of the foundation ring 1, and specifically, the anchor bolt fixing plate 2 can be welded on the outer periphery of the foundation ring 1, but the invention is not limited thereto, and other suitable connecting modes also belong to the protection scope of the invention, the mounting hole 3 can be a round hole, for example, and of course, if the shape of the mounting hole 3 is properly adjusted according to the needs, the invention also falls into the protection scope;
s2, referring to the figures 4 and 5 in particular, the pre-buried die pipe 4 is vertically arranged on the outer periphery side of the foundation ring 1, and the foundation ring 1 is connected with the pre-buried die pipe 4 by using a fastening suite (such as a screw rod 7 and a nut 8) which passes through the mounting hole 3, wherein the pre-buried die pipe 4 is pre-buried steel dies, such as a square steel pipe, but the invention is not limited to the embodiment;
s3, hoisting the foundation ring 1, and binding a metal cage structure 5 around the foundation ring 1, wherein the metal cage structure 5 is preferably a steel reinforcement cage, and certainly, if the metal cage structure 5 in other structural forms is adopted, the invention also belongs to the protection of the invention;
s4, referring to the figures 6 and 7 specifically, placing an anchor rod 11 in an embedded die pipe 4 along the vertical direction, connecting the upper end of the anchor rod 11 with an anchor bolt fixing plate 2, and suspending the lower end of the anchor rod 11, wherein the connection of the upper end of the anchor rod 11 with the anchor bolt fixing plate 2 can mean that the upper end of the anchor rod 11 is directly connected with the anchor bolt fixing plate 2 or indirectly connected with the anchor bolt fixing plate 2 through a necking plate 6, and the two connection modes are protected by the invention, specifically, the necking plate 6 can be connected with the anchor bolt fixing plate 2 through a threaded fastener 9, and the necking plate 6 is connected with the upper end of the anchor rod 11 through a second threaded fastener 10;
s5, pouring th Concrete 12 outside the embedded die pipe 4, and pouring second Concrete 13 inside the embedded die pipe 4, wherein preferably, common Concrete is used as the th Concrete 12, and Ultra-High Performance Concrete is used as the second Concrete 13, wherein the Ultra-High Performance Concrete is called UHPC (Ultra-High Performance Concrete) for short, also called Reactive Powder Concrete (RPC), and can be poured through the corresponding pouring hole 14;
s6, when the th concrete 12 and the second concrete 13 reach the preset strength, the pretension force is generated in the anchor rods 11, wherein the preset strength can be set according to the actual production situation, for example, the preset strength can be set by referring to the following table 1, for example, the design value f of the axial compressive strength of the concrete under the strength grade of C30CCan be 16.7N/mm2 and the core tensile strength design value f of the concretetMay be 1.43N/mm2Of course, this table is only used as a reference example, but not for limiting the present invention, and the skilled person can set the preset intensity according to the actual requirement.
Design value of concrete strength (N/mm)2)
Table 1
As mentioned above, since the construction method of the vertical anchor self-protection fan foundation provided by the present invention includes the above steps, the ultra-high performance concrete can be used as the second concrete 13, and the ultra-high performance concrete has superior durability and fatigue resistance, so that the anchor rod 11, the anchor bolt fixing plate 2 and the foundation ring 1 can work together for a long time, and the condition of stress concentration of the concrete around the flange under the foundation ring 1 is greatly reduced, thereby effectively avoiding the fatigue damage of the concrete around the foundation ring 1.
According to a preferred embodiment of the invention, a (brittle) low ductility metal material can be used as the necking plate 6. the brittle failure strength of the necking plate 6 is set below the limit strength of the anchor 11 fatigue failure, i.e. the necking plate 6 will brittle failure as soon as the tensile stress value in the anchor 11 exceeds its fatigue limit value, so that the anchor 11 embedded in the foundation will not fatigue fail at all times, and the necking plate 6 can be easily replaced.
In addition, the construction method of the vertical anchor self-protection type fan foundation can further comprise the following steps: in step S6, a pretension is generated in the anchor rod 11 by pretensioning the anchor fixing plate 2 against the necking plate 6, in particular, the upper end of the anchor rod 11 can be passed through the central hole of the necking plate 6, and then the bolt assembly connecting the necking plate 6 and the anchor fixing plate 2 around the central hole is pretensioned.
In addition, the invention also provides vertical anchor self-protection type fan foundations, and the vertical anchor self-protection type fan foundations are manufactured by the construction method of the vertical anchor self-protection type fan foundations.
In addition, the invention also provides vertical anchor self-protection type fan foundations, wherein each vertical anchor self-protection type fan foundation comprises th concrete 12, a foundation ring 1 arranged in the th concrete 12, a metal cage structure 5, an embedded mold pipe 4 and an anchor rod 11 in the embedded mold pipe 4, the embedded mold pipe 4 and the anchor rod 11 are arranged from top to bottom in the vertical direction, an anchor bolt fixing plate 2 is connected to the outer peripheral side of the foundation ring 1, the upper end of the anchor rod 11 is connected with the anchor bolt fixing plate 2, second concrete 13 is arranged in the embedded mold pipe 4, and the middle section and the lower end of the anchor rod 11 are arranged in the second concrete 13.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (10)
1, vertical anchor self preservation protects the construction method of the formula fan foundation, its characterized in that, including the following steps:
s1, arranging an anchor bolt fixing plate connected with the foundation ring on the outer periphery side of the foundation ring, wherein the foundation ring is provided with a plurality of mounting holes at positions below the anchor bolt fixing plate, and the mounting holes are arranged at intervals from top to bottom along the axial direction of the foundation ring;
s2, placing the embedded die pipe on the outer periphery of the foundation ring along the vertical direction, and connecting the foundation ring with the embedded die pipe by using a fastening suite penetrating through the mounting hole;
s3, hoisting the foundation ring, and binding a metal cage structure around the foundation ring;
s4, placing an anchor rod in the embedded die pipe along the vertical direction, connecting the upper end of the anchor rod with the anchor rod fixing plate, and suspending the lower end of the anchor rod;
s5, pouring th concrete outside the embedded die pipe, and pouring second concrete in the embedded die pipe;
and S6, when the th concrete and the second concrete reach the preset strength, enabling the anchor rod to generate pretension.
2. The method for constructing a self-protecting wind turbine foundation with vertical anchors according to claim 1, wherein the method for constructing a self-protecting wind turbine foundation with vertical anchors comprises the step of connecting the upper ends of the vertical anchors to the anchor fixing plate through a necking plate, the necking plate being connected to the anchor fixing plate through a -th threaded fastener, and the necking plate being connected to the upper ends of the vertical anchors through a second threaded fastener in step S4.
3. The construction method of the vertical anchor self-protection fan foundation according to claim 2, wherein the construction method of the vertical anchor self-protection fan foundation comprises the following steps: a low ductility metal material is used as the necking plate.
4. The construction method of the vertical anchor self-protection fan foundation according to claim 2 or 3, wherein the construction method of the vertical anchor self-protection fan foundation comprises the following steps: the brittle fracture strength of the necking plate is set to be lower than the limit strength of the bolt fatigue failure.
5. The construction method of the vertical anchor self-protection fan foundation according to claim 2 or 3, wherein the construction method of the vertical anchor self-protection fan foundation comprises the following steps: in step S6, a pretension is generated in the anchor rod by pretensioning the anchor bolt fastening plate against the necking plate.
6. The construction method of the vertical anchor self-protection fan foundation according to claim 2 or 3, wherein the construction method of the vertical anchor self-protection fan foundation comprises using common concrete as the th concrete and using ultra-high performance concrete as the second concrete.
7, vertical anchor self-protection fan foundation, characterized in that, the fan foundation is made by the construction method of the vertical anchor self-protection fan foundation according to any of claims 1 to 6.
8, kind of vertical anchor self preservation protects formula fan foundation, a serial communication port, vertical anchor self preservation protects formula fan foundation include concrete, set up in foundation ring, metal cage structure, pre-buried mould pipe in the concrete and stock in the pre-buried mould pipe, pre-buried mould pipe with the stock is arranged from last to down along vertical direction, the periphery side of foundation ring is connected with the crab-bolt fixed plate, the upper end of stock with the crab-bolt fixed plate is connected, the second concrete has in the pre-buried mould pipe, the middle section and the lower extreme of stock are arranged in the second concrete.
9. The self-protecting fan foundation of claim 8, wherein the upper ends of said anchor rods are connected to said anchor bolt retaining plate by a necking plate.
10. The self-protecting fan foundation of claim 9, wherein said necked-down plates have a brittle failure strength below a threshold strength for fatigue failure of said anchor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910985922.5A CN110735444B (en) | 2019-10-17 | 2019-10-17 | Vertical anchor self-protection type fan foundation and construction method thereof |
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| CN201910985922.5A CN110735444B (en) | 2019-10-17 | 2019-10-17 | Vertical anchor self-protection type fan foundation and construction method thereof |
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| CN110735444B CN110735444B (en) | 2021-09-10 |
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Cited By (1)
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| CN112268542A (en) * | 2020-10-23 | 2021-01-26 | 湖南砼联科技有限责任公司 | Detection method and measurement device for inclination angle of tower of wind turbine generator |
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| CN110735444B (en) | 2021-09-10 |
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