KR101828089B1 - vibration isolation device for wind tower and installing method thereof - Google Patents

Abstract

A seismic isolation device for a wind tower and its installation method are disclosed. The seismic isolation device for a wind tower according to embodiments of the present invention seeks to secure stability against tensile force by dispersing or reducing the tensile force applied to the seismic isolation device, It is possible to prevent the damage of the wind tower against the external force, thereby improving the overall reliability of the wind power generation system.

Description

[0001] The present invention relates to a vibration isolation device for a wind tower,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation device for a wind tower and a method of installing the seismic isolation device for a wind tower, and more particularly to a seismic isolation device for a wind tower capable of securing stability against a tensile force by dispersing or reducing a tensile force applied to the seismic isolation device. .

In recent years, interest in environmentally friendly energy is increasing as the depletion of fossil fuels and the environmental problems of existing power generation facilities are getting larger and larger. Dual wind power generation is one of the most economical and renewable energy technologies.

The wind turbine is mainly composed of a blade rotor that receives energy from the wind power and transfers it to the generator, a nacelle equipped with a power transmission device, a generator and various electric and mechanical devices, And a wind tower supporting the self weight of the assembly.

Here, the wind tower serves to support the thrust generated when the blade rotates, the weight due to the nacelle and the mass of the blade, the load due to the wind, and the wind tower for the wind turbine of the commercialized large- .

As the material of the wind tower, various materials such as wood, composite material, steel, concrete, steel / concrete mixture can be employed, among which steel structures are most widely used. Generally, a wind tower of a steel material is manufactured by assembling a cylinder at regular intervals and assembling each end with a flange and a bolt.

Such a wind tower is expensive because it occupies about 20% of the total wind turbine manufacturing cost. Therefore, it is very important to secure safety because the loss due to breakage is very large.

The main load and external forces to be considered in terms of safety are the earthquake motion transmitted from the foundation of the concrete floor, the wind load which has a great influence on the structural stability of the system, the rotation force due to the rotation of the blades, In order to insulate the structural vibration caused by such loads and external forces and ensure the safety of the support, an isolation device is applied to the lower part of the wind tower.

Such a seismic isolation device is usually installed between a lower flange of a wind tower and a concrete foundation. For example, when a vibration due to an earthquake is transmitted, a seismic vibration is insulated by shear deformation of the elastic body included in the seismic isolation device, And after the vibration disappears, it is restored to its original position due to elastic restoring force.

In addition, the stress concentration phenomenon occurs in the wind tower, which is the element supporting the system, in case of the wind load, the rotational force, and the impact force as well as the resistance against the earthquake vibration. The isolator plays a role of mitigating such stress concentration phenomenon. It is known to effectively isolate.

However, when deformation occurs due to vibration due to wind load or blade rotation force or impact force due to emergency stop, there is a phenomenon in which one side is compressed and the other side is in a tensile state due to the structure characteristic of an elastic body installed under the wind tower Occurs. In this dynamic behavior, the seismic isolation system based on rubber material is basically weak in tensile strength.

As a result of this disadvantage of weak seismic isolation equipment, it is possible to significantly deteriorate the insulation function of the isolation device and to significantly reduce the stability of the entire wind power system if repeatedly exposed to deformation due to wind load, blade rotation, ≪ / RTI >

Therefore, there is a need for a seismic isolation device for a wind tower capable of securing adequate support stability by compensating for the drawbacks of being weak in tensile force while maintaining insulation capability in the horizontal direction.

Embodiments of the present invention seek to improve the ability to respond to tensile forces by dispersing or reducing the tensile force applied to the seismic isolation device.

Also, it is intended to secure sufficient support stability of the isolation device by compensating for the disadvantage that it is vulnerable to tensile force while maintaining insulation capability in the horizontal direction.

Also, it is intended to improve the overall reliability of the wind power generation system by preventing the damage of the wind tower against external forces generated by impacts such as the vibration of the wind load or the blade and the emergency stop of the wind power generation system.

According to an aspect of the present invention, there is provided a wind turbine comprising: a base for supporting a wind tower; a lower flange provided below the wind tower; and a first surface made of a plurality of surface rigid members sandwiched between the base and the lower flange, And a second surface vane assembly disposed between the base and the lower flange to block vibrations and to reduce the tensile force applied to the first surface vane assembly, An isolation device may be provided.

Here, the first surface inclination assembly may be provided between the upper surface of the base and the lower flange bottom.

On the other hand, the base includes a base extension extending upward from the base and extending from the upper portion to the wind tower side, and the second surface vault assembly is interposed between the base extension and the upper surface of the lower flange, Can be blocked.

The second surface vault assembly is disposed between the upper surface of the base and the lower flange bottom and may be located at a different distance from the center axis of the wind tower to the first surface vault assembly.

The base further includes a first base extension portion extending upward from the base and extending from the upper portion to the wind tower side, and a second base extension portion extending upward from the first base extension portion, A third surface inclined assembly provided between the first base extension and the upper surface of the lower flange and having a second base extension extending therefrom and interposed between the first base extension and the lower flange; And a fourth-sided damping assembly for blocking off.

A second lower flange extending from the wind turbine tower above the lower flange; and a second lower flange disposed between the upper surface of the base and the lower surface of the second lower flange and spaced apart from the center axis of the wind tower, And a second face-side vibration-damping assembly located in the second face-side vibration damping assembly.

According to another aspect of the present invention, there is provided a wind turbine comprising: a base for supporting a wind tower; a lower flange provided below the wind tower; and a first surface made of a plurality of surface rigid members provided between the base and the lower flange, A base extension extending upwardly from the base and extending from the top to the wind tower side and a base extension extending between the base extension and the bottom flange to block vibrations and to provide a vibration to the first surface An earthquake-proof apparatus for a wind tower including a second surface-finishing assembly composed of a plurality of surface vibration members for dispersing a tensile force to be applied may be provided.

Here, the elastic material used for the face rim may be at least one of rubber, urethane, silicone, and asphalt.

According to another aspect of the present invention, there is provided a method of constructing a foundation, comprising the steps of installing a base by pouring concrete on an upper part of a ground, and securing a first surface vise assembly made up of a plurality of plane members to the base and the lower flange, Installing a first side skirting assembly between the first side skirting assembly and the first side skirting assembly, installing a second side skirting assembly comprised of a plurality of skirting members to reduce the tensile force applied to the first side skirting assembly, A step of installing a wind power tower may be provided.

The method may further include the step of providing a base extension extending upwardly from the base and extending from the top to the wind tower, wherein the second surface vise assembly is installed between the bottom flange and the base extension .

Embodiments of the present invention can improve the ability to respond to tensile forces by dispersing or reducing the tensile force applied to the seismic isolator.

In addition, sufficient support stability of the seismic isolation device can be ensured by compensating for the disadvantage that it is vulnerable to the tensile force while maintaining the insulating ability in the horizontal direction.

In addition, the overall reliability of the wind power generation system can be improved by preventing the damage of the wind tower against the external force generated by the impact such as the vibration of the wind load or the rotating force of the blade and the emergency stop of the wind power generation system.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a basic configuration of a seismic isolation device for a wind tower according to an embodiment of the present invention;
2 is a conceptual diagram illustrating a case where a tensile force is applied to a seismic isolation device for a wind tower according to an embodiment of the present invention.
FIG. 3 is a plan view showing a structure of a face girder arrangement of a seismic isolation device for a wind tower according to an embodiment of the present invention.
FIG. 4 is a perspective view showing a structure of a face girder arrangement of a seismic isolation device for a wind tower according to an embodiment of the present invention.
5 is a front view showing the configuration of a face girder of a seismic isolation device for a wind tower according to an embodiment of the present invention.
6 is a diagram showing a seismic isolation device for a wind tower according to a first embodiment of the present invention
Fig. 7 is a view showing a seismic isolation device for a wind tower according to a second embodiment of the present invention
8 is a diagram showing a seismic isolation device for a wind tower according to a third embodiment of the present invention
9 is a diagram showing a seismic isolation device for a wind tower according to a fourth embodiment of the present invention
10 is a process diagram showing a procedure for installing the seismic isolation device for a wind tower according to the first embodiment of the present invention
11 is a flowchart showing a procedure for installing the seismic isolation device for a wind tower according to the first embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like reference numerals designate like elements throughout the specification.

FIG. 1 is a structural view showing a basic configuration of a seismic isolation device for a wind tower according to an embodiment of the present invention. FIG. 2 shows a case where a tensile force is applied to a seismic isolation device for a wind tower according to an embodiment of the present invention And FIG. 3 is a plan view showing a structure of a face girder arrangement of a seismic isolation device for a wind tower according to an embodiment of the present invention. FIG. 4 is a perspective view illustrating a structure of a face girder arrangement of a wind power tower according to an embodiment of the present invention, FIG. 5 is a perspective view of a face wave member of a wind power tower according to an embodiment of the present invention, It is a front view.

1 to 5, a seismic isolation device for a wind tower according to an embodiment of the present invention includes a base 20 for supporting a wind tower 10, a lower flange 20 provided below the wind tower 10, And a first surface vane assembly 40 which is provided between the base 20 and the lower flange 30 and includes a plurality of surface vibration members 41 for blocking vibration.

The base 20 is formed by placing concrete on a ground on which the wind tower 10 is to be installed. The shape of the base 20 may be variously shaped and shaped depending on the topography of the wind tower 10, the soil, the capacity and the load of the wind turbine system, the size of the wind tower 10, and the like.

The first surface skewer assembly 40 may be installed between the lower portion of the lower flange 30 of the wind tower 10 and the base 20 and more specifically the upper surface of the base 20 and the lower flange 30 ).

The first surface skirting assembly 40 is configured to form a group of aggregates having a predetermined shape by joining a plurality of plane members 41 together. That is, the plane members 41 are assembled successively in correspondence with the lower circumference of the lower flange 30 of the wind tower 10, and the adjacent plane members 41 may be coupled to each other so as to have a generally cylindrical shape have.

In the embodiment shown in FIGS. 3 and 4, a plurality of face gear members 41 are coupled in a circumferential direction to form a donut shape so as to effectively support the conical wind tower 10. However, The shape of the first-surface vibration-damping assembly 40 may be variously configured in accordance with the shape of the wind tower 10.

As shown in FIG. 5, each of the face gears 41 constituting the first surface inclination assembly 40 may be composed of alternately stacked elastic material layers 43 and a rigid material layer 44.

The elastic material layer 43 may be made of an elastic material such as rubber, urethane, silicone, or asphalt, and may be made mainly of rubber. The stiffness material layer 44 may be made of a metal plate. Specifically, it may be made of steel including stainless steel or special steel, as well as high-strength cast iron, aluminum alloy, titanium alloy, etc. The capacity of the wind tower, And the environment and the manufacturing cost.

For example, in the case of stainless steel, SUS304, SUS316, SUS430 and SUS410 can be used. When the wind tower 10 is installed in a place susceptible to salt and corrosive gas, such as a coastal zone or a factory zone, It is preferable to use SUS316 which is excellent in corrosion resistance.

In addition, the rigid material layer 44 may be made of a highly elastic cured rubber having high strength.

The stiffener layer 44 serves to reinforce the vertical load bearing force provided by the elastic material layer 43. The thickness and the number of layers of the rigid material layer 44 should be determined in consideration of the applicable top vibration, earthquake motions, wind loads including gust, and the like.

A lower steel plate 45 and an upper steel plate 46 may be provided on the lower and upper portions of the face gear member 41, respectively. The lower steel plate 45 is coupled to the base 20 by bolts 47 and the upper steel plate 46 is also coupled to the lower flange 30 of the wind tower 10 by bolts 48 do.

That is, the lower steel plate 45 and the upper steel plate 46 are coupled with the outer structure to fix the surface gear member 41, absorb primary shocks applied to the surface gear member 41, 41).

The outer surface of the face gear member 41 may be surrounded by a rubber outer cover (not shown) made of rubber or the like. The rubber outer cover 43 may be integrally formed with an elastic material layer 43 made of rubber It is possible.

The first surface inclination assembly 40 made up of the surface vibration member 41 having the above-described configuration is made of a material such as the thrust due to the rotation of the blades provided in the wind tower 10, the weight due to the nacelle and the blade mass, It is possible to effectively attenuate an external force having a variable directionality.

However, as shown in FIG. 2, when a deformation occurs due to a vibration due to a wind load or a blade turning force or an impact such as an emergency stop of the wind power generation system, Is in a tensioned state and the other side is in a compressed state.

At this time, attenuation of the external force is caused by the surface vibration members 41, but since the surface vibration member 41 made of an elastic body such as rubber has basically a weak tensile force characteristic, .

As a result of this disadvantage of weak seismic isolation equipment, it is possible to significantly deteriorate the insulation function of the isolation device and to significantly reduce the stability of the entire wind power system if repeatedly exposed to deformation due to wind load, blade rotation, ≪ / RTI >

Therefore, the seismic isolation device for a wind tower according to an embodiment of the present invention is provided between the base 20 and the lower flange 30 to block vibrations, and the tensile force applied to the first surface- And a second surface vane assembly 50 made up of a plurality of face gears 41 for reducing vibration.

6 is a configuration diagram showing a seismic isolation device for a wind tower according to a first embodiment of the present invention.

6, the base 20 is extended upward from the base 20, and extends from the upper portion to the wind tower 10 side And the second surface vault assembly 50 is interposed between the base extension 22 and the upper surface of the lower flange 30 to prevent vibration.

In addition to the basic configuration of the seismic isolation device for a wind tower described with reference to FIG. 1, a base extension 22 and a second surface inclined assembly 50 are additionally provided. The base extension 22 may extend together with the base 20 to form the base 20. The base extension 20 may be integrally formed with the base 20 such that the first and second flanges 30, It is preferable to install the face gear assembly 40 and the lower flange 30 afterwards.

The base extension 22 extends upward to a position higher than the first surface inclination assembly 40 and the lower flange 30 and extends around the wind tower 10 in accordance with the shape of the wind tower 10. [ As shown in Fig.

The base extension portion 22 is bent to extend from the upper portion to the wind tower 10 side so that the second surface finishing assembly 50 can be disposed between the extended portion and the lower flange 30. At this time, it is preferable that the lower flange 30 is formed so as to be sufficiently extended so that the second surface venter assembly 50 can be placed.

The second face skirting assembly 50 may be configured to combine the plurality of skirt members 41, such as the first face skirting assembly 40, to form an assembly of a predetermined shape. That is, the wind turbine tower 10 may be arranged so as to correspond to the lower circumferential portion of the lower flange 30, and the adjacent plane members 41 may be coupled to each other to form a generally cylindrical shape.

However, in the present embodiment, it has been described that the first surface finishing assembly 40 is disposed outside the wind tower 10 in the form of a donut having a larger diameter than the first surface finishing assembly 40.

As such, the double-sided placement of the second side skirting assembly 50 on the lower flange 30 transforms the tensile force acting on the first side skirting assembly 40 into a compressive force on the second side skirting assembly 50 Thereby reducing the tensile force acting on the entire isolation device.

5, the elastic material layer 43 applied to the face girder 41 is mainly made of an elastic material such as rubber and has a property of being much higher in compression stiffness than tensile rigidity. In addition, the compressive force acts on the portion where only the original tensile force is exerted, thereby reducing the burden and exhibiting the effect of having greater rigidity.

Therefore, as described above, when the wind tower isolation device is constructed in a double structure, it is possible to improve stability against tensile force applied asymmetrically by improving the drawback that it is vulnerable to tensile force compared to a single structure.

FIG. 7 is a configuration diagram showing a seismic isolation device for a wind tower according to a second embodiment of the present invention.

Referring to FIG. 7, the second surface finishing assembly 50 is installed between the upper surface of the base 20 and the lower surface of the lower flange 30, And may be located at a different distance from the center axis of the wind tower 10 than the first surface vise assembly 40.

In this embodiment, the second surface skewer assembly 50 is additionally disposed on the outer surface of the first surface skewer assembly 40 without the base extension 22.

As shown in FIG. 7, the second surface vault assembly 50 is configured to have a large diameter located farther from the center axis of the wind tower 10 than the first surface venter assembly 40, It is possible to have a smaller diameter than the one-face rigid assembly 40.

In this embodiment as well, the tensile force applied only to the first surface venter assembly 40 is dispersed and applied to the second surface venter assembly 50, so that the tensile rigidity of the entire system can be enhanced.

FIG. 8 is a configuration diagram showing a seismic isolation device for a wind tower according to a third embodiment of the present invention.

Referring to FIG. 8, an earthquake-proof apparatus for a wind tower according to a third embodiment of the present invention can be constructed as a multi-structure earthquake apparatus by applying a further configuration to the dual-structure earthquake apparatus described with reference to FIG.

Specifically, the base 20 includes a first base extension portion 22 extending upward from the base 20 and extending from the upper portion to the wind tower 10 side, And a second base extension 24 extending upward from the upper portion 22 and extending from the upper portion to the wind tower 10 side.

A third surface inclined assembly 60 is provided between the first base extension 22 and the upper surface of the lower flange 30 to block vibrations and a third surface inclined assembly 60 between the second base extension 24 and the upper surface of the lower flange 30. [ And a fourth-surface vibration-damping assembly 110 for blocking vibration.

The first base extension 22 extends upward to a position higher than the first surface vise assembly 40 and the second surface vise assembly and the lower flange 30 and the second base extension 24 And extends upward to a position higher than the first base extension 22.

Both the first base extension 22 and the second base extension 24 extend from the top of the first base extension 22 toward the wind tower 10 and extend between the extended portion and the bottom flange 30, The assembly 60 and the fourth side skirting assembly 110 may be disposed.

At this time, the second base extension 24 is configured to extend further toward the wind tower 10 than the first base extension 22 so that the fourth surface viper assembly 110 can be disposed, and the lower flange 30 are preferably formed to extend sufficiently to allow the second face vise assembly 50, the third face vise assembly 60, and the fourth face vise assembly 110 to be placed.

The first base extension 22 and the second base extension 24 may extend together when forming the base 20 but may be formed from a combination of a first face vise assembly 40 and a second face vise assembly 50 and the lower flange 30 in consideration of the convenience of the operation.

The first base extension portion 22 and the second base extension portion 24 may be formed to surround the wind tower 10 in a circular manner in accordance with the shape of the wind tower 10. [

The third face vise assembly 60 and the fourth face vise assembly are assembled in such a manner that a plurality of face members 41, such as the first face vise assembly 40 and the second face vise assembly 50, Assemblies < / RTI >

That is, the wind turbine tower 10 may be arranged so as to correspond to the lower circumferential portion of the lower flange 30, and the adjacent plane members 41 may be coupled to each other to form a generally cylindrical shape.

Application of the multi-structure seismic isolator as in this embodiment can improve the reliability of the wind power generation system by ensuring a sufficient design strength in a region where a risk of an earthquake is large or a large wind load is applied.

Fig. 9 is a configuration diagram showing a seismic isolation device for a wind tower according to a fourth embodiment of the present invention.

9, a fourth embodiment of a seismic isolation device for a wind tower according to the present invention includes a second lower flange 30 extending from the wind tower 10 above the lower flange 30, 20 and the second surface of the second lower flange 30 and is located at a different distance from the center axis of the wind tower 10 than the first surface leveling assembly 40, ). ≪ / RTI >

In this embodiment, in addition to the basic structure described in FIG. 1, a second surface-finishing assembly (not shown) is disposed at a distance from the center axis of the second bottom flange 30 and the wind tower 10, 50).

The second lower flange 30 may extend horizontally on the outer circumferential surface of the wind tower 10 above the lower flange 30. The second lower flange 30 may be coupled to the outer circumferential surface of the wind tower 10 through welding or fastening.

The second surface vault assembly is provided between the lower surface of the second lower flange 30 and the upper surface of the base 20 and extends from the center axis of the wind tower 10 so as not to overlap with the first surface venter assembly 40, It is preferable to be located at a different distance from the one-side ridge assembly 40.

In FIG. 9, the second surface finishing assembly 50 is formed to have a larger diameter than the first surface finishing assembly 40, but the present invention is not limited thereto.

FIG. 10 is a process chart showing the installation procedure of the seismic isolation device for a wind tower according to the first embodiment of the present invention, and FIG. 11 is a view showing a procedure for installing the seismic isolation device for a wind tower according to the first embodiment of the present invention It is a flowchart.

10 and 11, a method of installing the seismic isolation device for a wind tower according to the first embodiment of the present invention will be described.

First, the base 20 is installed by placing concrete on the ground surface (S10). The lower face and the upper face of the first face gear assembly 40 composed of a plurality of face gears 41 are fixed to the base 20 and the lower flange 30, respectively, 30, the first surface skirting assembly 40 is installed (S20).

In this case, the fixing procedure may be arbitrarily performed, and the first surface skewer assembly 40 may be fixed to the base 20 and then the lower flange 30 may be fixed to the upper surface of the first surface skewer assembly 40, May be first coupled to the lower flange 30, and then fixed to the base 20 together.

Thereafter, a base extension extending upward from the base 20 and bent toward the wind tower 10 from the upper side and extending to the upper surface of the second surface venter assembly 50 is installed (S30).

The base extension 22 extends upward to a position higher than the first surface inclination assembly 40 and the lower flange 30 and extends around the wind tower 10 in accordance with the shape of the wind tower 10. [ As shown in Fig.

The base extension 22 may extend together with the base 20 to form the base 20. The base extension 20 may be later installed in consideration of the convenience of the operation of installing the first surface finishing assembly 40 and the lower flange 30 desirable.

After the base extension 22 is formed as described above, the second surface finishing assembly 50 is fixedly installed between the base extension 22 and the lower flange S40. Here, the second surface venter assembly 50 serves to reduce the tensile force applied to the first surface venter assembly 40, as described above.

Finally, a wind tower 10 is installed on the lower flange 30 (S50).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims. You can do it. It is therefore to be understood that the modified embodiments are included in the technical scope of the present invention if they basically include elements of the claims of the present invention.

10: wind tower 20: base
22: base extension 30: bottom flange
40: First Face Vibration Assembly 50: Second Face Vibration Assembly

Claims (10)

A base supporting the wind tower;
A lower flange provided below the wind tower;
A first surface vane assembly disposed between the base and the lower flange and including a plurality of surface vanes to block vibration; And
And a second surface vise assembly disposed between the base and the lower flange to block vibrations and to reduce a tensile force applied to the first surface vise assembly,
Wherein the first surface veneer assembly or the surface veneers of the second surface veneer assembly are correspondingly chain-assembled about the lower flange bottom of the wind tower, the adjacent surface veneers are mutually joined to form a generally circumferential shape, Wherein each of the surface finishing materials comprises an elastic material layer and a rigid material layer alternately stacked. The method according to claim 1,
Wherein the first surface inclination assembly is provided between the upper surface of the base and the lower flange bottom. 3. The method of claim 2,
The base includes a base extension extending upwardly from the base and extending from the top to the wind tower side,
And the second surface vault assembly is interposed between the base extension and the upper surface of the lower flange to block the vibration. 3. The method of claim 2,
Wherein the second surface vault assembly is provided between the upper surface of the base and the lower flange bottom and is located at a different distance from the center axis of the wind tower than the first surface venter assembly. 5. The method of claim 4,
The base includes a first base extension extending upwardly from the base and extending from the top to the wind tower side and a second base extension extending upwardly from the first base extension and extending from the top to the wind tower side, A second base extension,
A third surface inclined assembly provided between the first base extended portion and the upper surface of the lower flange to block vibration and a fourth surface inclined assembly provided between the second base extended portion and the upper surface of the lower flange, Including an isolator for wind tower. 3. The method of claim 2,
A second lower flange extending from the wind tower above the lower flange,
Further comprising a second surface vault assembly disposed between said base upper surface and said second lower flange bottom and located at a different distance from said first surface vault assembly from a center axis of said wind tower. A base supporting the wind tower;
A lower flange provided below the wind tower;
A first surface vane assembly disposed between the base and the lower flange and including a plurality of surface vanes to block vibration;
A base extension extending upward from the base and extending from the top to the wind tower side; And
And a second surface vise assembly disposed between the base extension and the lower flange to block vibrations and to disperse a tensile force applied to the first surface vise assembly,
Wherein the first surface veneer assembly or the surface veneers of the second surface veneer assembly are correspondingly chain-assembled about the lower flange bottom of the wind tower, the adjacent surface veneers are mutually joined to form a generally circumferential shape, Wherein each of the surface finishing materials comprises an elastic material layer and a rigid material layer alternately stacked. 8. The method according to any one of claims 1 to 7,
Wherein the elastic material layer used for the face girder is made of at least one of rubber, urethane, silicone, and asphalt. Placing a concrete on top of the ground to provide a base;
Securing a first surface vice assembly made up of a plurality of surface rigid members made of an elastic material layer and a rigid material layer which are alternately stacked on the base and the lower flange and installing a first surface skirting assembly between the base and the lower flange ;
Providing a second surface vise assembly comprising a plurality of alternating layers of elastic material and a plurality of rigid material layers to reduce tension applied to the first surface veneer assembly; And
And installing a wind tower on top of the lower flange,
The step of installing the first surface veneer assembly or the step of installing the second surface veneer assembly may be accomplished by correspondingly assembling the surface tilting materials around the lower flange lower portion of the wind tower so that the adjacent surface veneers are joined together Wherein the step of installing the seismic isolation device is performed so as to be arranged in a circular shape as a whole. 10. The method of claim 9,
And installing a base extension extending upwardly from the base and extending from the top to the wind tower side,
And the second surface vault assembly is installed between the lower flange and the base extension.

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