KR20180113839A - Construction equipment of bridge and method for constructing bridge using this same - Google Patents

Abstract

According to an embodiment, construction equipment of a bridge comprises: a frame capable of moving on a first guide rail; a first transfer unit arranged in the center of the frame to transfer an upper plate; and a second transfer unit arranged on both side surfaces of the frame to transfer a second guide rail. Moreover, the second guide rail is transferred toward an end portion of the first guide rail to be connected to the end portion of the first guide rail.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bridge construction apparatus and a bridge construction method using the bridge construction apparatus.

The present invention relates to a bridge construction apparatus and a bridge construction method using the bridge construction apparatus, and more particularly, to a bridge construction apparatus capable of tracing a guide rail and an upper plate (or a reinforcement girder) horizontally and a bridge construction method using the bridge construction apparatus .

A suspension bridge means a bridge constructed by laying a main cable so as to extend over an upper part of the main tower, placing a bridge girder between the main tower and the main tower, and connecting the bridge girder to the main cable using a hanger rope.

These suspension bridges are mainly used to connect canyons and rivers to each other, and are useful for opening a hiking trail.

Among the processes of constructing a suspension bridge, there are a method of installing a bridge girder by using a floating crane, a lifting crane, a crowned crane, or a lifting jack.

However, conventional methods for constructing suspension bridges have a problem in that it is not easy to install bridges at a high flow rate or to install bridges at mountain gorges. Particularly, when a marine crane is used, the weight of the cargo and the lifting height must be taken into consideration in the work.

For example, KR 10-2007-0118296, filed on November 20, 2007, discloses a " suspension bridge construction method ".

An object of the present invention is to provide a bridge construction apparatus capable of constructing a guide rail and a bridge plate of a long bridge independently of the influence of marine climate without disturbing maritime traffic, Thereby providing a bridge construction method.

An object of the present invention is to provide a bridge construction apparatus capable of horizontally pulling a guide rail and an upper plate to be installed in a predetermined position, and a bridge construction method using the bridge construction apparatus.

An object of the present invention is to provide a bridge construction apparatus which can be a transportation route of a top plate when a guide rail is installed on a top plate and become a part of a bridge structure after completion of construction of a bridge, and a bridge construction method using the bridge construction apparatus .

The object of the present invention is to provide a bridge construction apparatus capable of securing the wind stability similar to a finished bridge by installing a guide rail after completion of a guide rail and capable of moving and setting the upper plate even under a strong wind, To provide a bridge construction method using the bridge.

An object of the present invention is to provide a bridge construction apparatus that can easily modify the pre-tensioning value, such as a change in pre-tensioning value, in a fastened state of a guide rail before a top plate is installed, and a bridge construction method using the bridge construction apparatus .

According to an embodiment of the present invention, the load applied by the upper plate is directly transmitted to the cable by the beam, so that only the axial force due to the cable tension acts on the guide rail, thereby preventing the buckling of the guide rail. And a bridge construction method using the bridge construction equipment.

The object of the present invention is to provide a bridge construction apparatus which can reduce the construction cost of a bridge significantly and can remove and reuse the bridge because the guide rail is not subjected to a load in the case of a suspension bridge, and a method of constructing a bridge using the bridge construction apparatus.

According to an aspect of the present invention, there is provided a bridge construction apparatus comprising: a frame movable on a first guide rail; A first conveying unit disposed at the center of the frame for conveying the upper plate; And a second conveying unit disposed on both sides of the frame for conveying a second guide rail, the second guide rail being conveyed toward an end of the first guide rail and connected to an end of the first guide rail have.

According to one aspect of the present invention, the frame includes a central frame in which the first conveying section is disposed; And a front frame connected to the front of the center frame and having the second conveying part disposed therein, wherein the upper plate is held below the center frame, and the second guide rail is held below the front frame have.

According to one aspect of the present invention, the first transfer portion includes a central holding member connected to both sides of the center frame, and the central holding member can hold a portion adjacent to the edge of the upper plate.

According to one aspect of the present invention, the second conveying portion includes a front holding member connected to both sides of the front frame, and the front holding member can grip a central portion of the second guide rail.

According to one aspect of the present invention, the frame further includes a rear frame connected to the rear of the center frame and to which the second conveying section is disposed, and the second conveying section includes: a third holding member connected to both sides of the rear frame; As shown in FIG.

According to one aspect of the present invention, a roller is mounted on a lower surface of the frame, the roller is disposed at a connecting portion between the center frame and the front frame and a connecting portion between the center frame and the rear frame, And may be provided in a shape symmetrical with respect to each other.

According to another aspect of the present invention, there is provided a method of constructing a bridge, the method comprising: installing a pylon to be separated from a ground; Providing a cable and a beam between the ground and the pylon; Coupling a plurality of guide rails to the beam; And installing an upper plate on the guide rail, wherein the cable is connected to both ends of the beam, and the plurality of guide rails are coupled to the beam at positions spaced from both ends of the beam.

According to one aspect of the present invention, in the step of constructing the main tower so as to be spaced apart from the ground, a plurality of main towers are installed, a guide cable is provided between the plurality of main towers, and when the load acting on the main tower is symmetrical, .

According to one aspect, in the step of installing the upper plate on the guide rail, the upper plate starts to be installed when the guide rail passes through the main tower and becomes a second guide rail, and the upper plate is installed from the main tower toward the ground .

According to the bridge construction apparatus according to the embodiment and the bridge construction method using the bridge construction apparatus, it is possible to construct the bridge rail independently from the influence of the marine climate without obstructing the marine traffic, .

According to the bridge construction apparatus according to one embodiment and the bridge construction method using the bridge construction apparatus, the guide rail and the upper plate can be horizontally pulled and installed in a predetermined position.

According to the bridge construction apparatus according to one embodiment and the bridge construction method using the bridge construction apparatus, the guide rail becomes a transportation path of the upper plate when the upper plate is constructed and can be a part of the bridge structure after completion of the bridge construction.

According to the bridge construction apparatus according to one embodiment and the bridge construction method using the bridge construction apparatus, it is possible to secure the wind stability similar to that of the completed bridge by installing the guide rail after the completion of the guide rail, And hypotheses may be possible.

According to the bridge construction apparatus according to one embodiment and the bridge construction method using the bridge construction apparatus, it is possible to easily change the pre-tensioning value in the guide rail fastened state before the upper plate is installed, thereby ensuring the flexibility of the process.

According to the bridge construction apparatus according to the embodiment and the bridge construction method using the bridge construction apparatus, the load due to the upper plate is directly transmitted to the cable by the beam (or sleepers), and only the axial force due to the cable tension acts on the guide rail The possibility of buckling of the guide rail is prevented and the load received by the upper plate and the guide rail becomes independent, so that the numerical analysis can be facilitated.

According to the bridge construction apparatus according to one embodiment and the bridge construction method using the bridge construction apparatus, the cost of the bridge construction is considerably reduced, and in the case of the suspension bridge, the guide rail is not subjected to the load, so it can be removed and recycled.

1 is a top view of a bridge construction equipment according to one embodiment.
2 is a side view of a bridge construction equipment according to one embodiment.
FIGS. 3A and 3B illustrate a guide rail and an upper plate being transported by a bridge construction equipment according to an embodiment.
4 is a flowchart illustrating a method of constructing a bridge according to an embodiment.
5A to 5I illustrate a bridge construction process according to a bridge construction method according to an embodiment.
6A to 6E show a process in which a guide rail is coupled to a cable and a beam, and an upper plate is installed on the guide rail.

Hereinafter, embodiments will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments, detailed description of known functions and configurations incorporated herein will be omitted when it may make the best of an understanding clear.

In describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

The components included in any one embodiment and the components including common functions will be described using the same names in other embodiments. Unless otherwise stated, the description of any one embodiment may be applied to other embodiments, and a detailed description thereof will be omitted in the overlapping scope.

FIG. 1 is a plan view of a bridge construction apparatus according to an embodiment. FIG. 2 is a side view of a bridge construction apparatus according to an embodiment. FIGS. 3a and 3b show a state in which a guide rail and a top plate Fig.

1 and 2, a bridge construction apparatus 10 according to an embodiment may include a frame 100, a first conveyance unit 200, and a second conveyance unit 300.

The bridge construction equipment 10 according to an embodiment is a device for conveying and installing the upper plate (or the reinforcing girder) G and the guide rail R, and is a structure that is symmetrical with respect to the longitudinal direction or the left- .

The forward and backward directions indicate the running direction or the throttling direction of the frame 100, and the left and right directions may indicate a direction orthogonal to the running direction of the frame 100 or a direction orthogonal to the thrashing direction.

The frame 100 may be provided on the guide rail R so as to be movable in a horizontal direction.

Specifically, the frame 100 may include a central frame 110, a front frame 120, and a rear frame 130.

The center frame 110 may be provided in the shape of a rectangular frame, for example, and may be disposed at the center in the entire structure of the frame 100.

At this time, the first transfer part 200 may be disposed in the center frame 110, and the upper plate or the reinforcing girder G may be held or loaded on the lower side of the center frame 110.

The front frame 120 may be connected to the front of the central frame 110.

The front frame 120 may include a plurality of cantilever beams extending forward from both sides of the center frame 110.

At this time, the front direction indicates the front side in the running direction of the frame 100, and the rear side indicates the rear side in the running direction of the frame 100.

The front grip member 310 of the second transfer unit 300 may be disposed on the front frame 120 and the guide rail G may be held on the lower side of the front frame 120. [ At this time, the plurality of cantilever beams are respectively held by the guide rails G so that a plurality of guide rails G can be held on the front frame 120.

The rear frame 130 may be connected to the rear of the central frame 110.

The rear frame 130 may include a plurality of cantilever beams extending rearward from both sides of the center frame 110.

At this time, the rear holding member 320 of the second transfer unit 300 may be disposed on the rear frame 130, and the guide rail G may be held on the lower side of the rear frame 130. At this time, the plurality of cantilever beams are respectively held by the guide rails G so that a plurality of, especially two, guide rails G can be held in the rear frame 130. [

 In addition, a roller 140 may be mounted on the lower surface of the frame 100, particularly, the center frame 110.

The roller 140 is for moving the frame 110 on the guide rail G and specifically for connecting the connection between the center frame 110 and the front frame 120 and the connection between the center frame 110 and the rear frame 130 And may be disposed so as to be able to contact the upper surface of the guide rail R installed in the connection portion.

The guide rail R and the upper plate G can be transferred and constructed from only one apparatus from the plant G to the installation position of the top plate G by adding the steering property of the roller 140. [

However, the structure for moving the frame 100 is not limited to this, and any structure can be used as long as it can smoothly transfer the guide rail R or the upper panel G to the installed position.

As described above, the first transfer part 200 may be disposed in the frame 100, particularly, the central frame 110.

The first transfer unit 200 is for transferring the upper plate G and may include a plurality of central holding members 210, 220, 230, and 240.

The plurality of central holding members 210, 220, 230, and 240 may be, for example, four central holding members, and may hold a portion adjacent to the edge of the upper plate G.

Specifically, the plurality of central gripping members 210, 220, 230, and 240 include two central gripping members 210 and 220 spaced apart from each other on one side of the center frame 110, The two central grip members 230 and 240 may be spaced apart and arranged symmetrically with respect to a central axis extending along the diagonal direction.

The first central gripping member 210 of the plurality of central gripping members includes a supporting element 212 for supporting the lower end of the upper plate G and a hydraulic jack 214 connected to the supporting element 212 And the upper plate G can be gripped or separated by the supporting element 212 through the control of the operation of the hydraulic jack 214. [

For example, when the upper plate G is gripped by the supporting element 212 while the upper plate G is being conveyed toward the position where the upper plate G is to be installed, the upper plate G is separated from the supporting element 212 And can be installed in a space between a plurality of guide rails G installed. The same can be applied to the other central grip members 220, 230, and 240. [

However, the shape of the plurality of central holding members 210, 220, 230, and 240 is not limited thereto, and any shape can be used as long as the upper plate G can be stably transported. For example, a plurality of top grips G may be held by a plurality of central grip members 210, 220, 230,

The top plate G is transferred by the plurality of central holding members 210, 220, 230 and 240 while being disposed above the upper plate G provided with the upper plate G, Can be run on the guide rail (R) without interfering with each other.

In addition, the second transfer part 300 may be disposed on the frame 100, particularly, the front frame 120 and the rear frame 130. [

The second transfer unit 300 includes a plurality of forward gripping members 310 and a plurality of rear gripping members 320 for gripping a central portion of the guide rail R .

The plurality of front holding members 310 may be formed of, for example, two front holding members, and may be mounted on each of the two or more cantilever beams of the front frame 120.

Specifically, each of the front grip members 310 includes a support element 312 for supporting the lower end of the guide rail R, a first hydraulic jack 314 connected to the support element 312, and a first hydraulic jack 314 And a second hydraulic jack 316 connected to the support element 312 spaced apart from the second hydraulic jack 316. At this time, the guide rail R can be gripped or separated by the support element 312 through the operation control of the first hydraulic jack 314 and the second hydraulic jack 316.

The guide rail R is gripped by the support element 312 while the support element 312 is being transported toward the point where the guide rail R is to be installed and when the support rail 312 reaches the point at which the guide rail R is to be installed, And may be connected to the end of the guide rail.

Likewise, the plurality of rear holding members 310 may be provided on, for example, two rear holding members and may be mounted on each of the two or more cantilever beams of the rear frame 130.

Specifically, each rear grip member 320 includes a support element 322 for supporting the lower end of the guide rail R, a first hydraulic jack 324 connected to the support element 322, and a first hydraulic jack 324 And a second hydraulic jack 326 connected to the support element 322 spaced apart from the second hydraulic jack 326. At this time, the guide rail R can be gripped or separated by the support element 322 through the operation control of the first hydraulic jack 324 and the second hydraulic jack 326.

For example, the guide rail R is gripped by the support element 322 while the guide rail R is being transported toward the point where the guide rail R is to be installed, and when the support rail 32 reaches the point at which the guide rail R is to be installed, And may be connected to the end of the guide rail.

However, the shapes of the front gripping member 310 and the rear gripping member 320 are not limited to those described above, and any of them can be used as long as the guide rail R can be stably transported. For example, the plurality of guide rails R may be held by the front holding member 310 and the rear holding member 320. [

In particular, with reference to Figures 3A and 3B, the bridge construction equipment 10 according to one embodiment described above can be operated as follows.

3A is a top view of the bridge construction equipment 10 according to an embodiment, and FIG. 3B is a view of the bridge construction equipment 10 according to an embodiment when viewed from the bottom.

3A and 3B, after the cables C and the beams B (or sleeper) are installed on the pylon A, the bridge construction equipment 10 according to one embodiment is installed It is possible to load the guide rail R, for example, the second guide rail R2, and to travel along the guide rail R (for example, the first guide rail R1).

At this time, the second guide rail R2 may be coupled to the end of the first guide rail R1 after being transported toward the end of the first guide rail R1 from above the first guide rail R1.

Therefore, after the first guide rail R1 is installed on the bridge construction equipment 10 according to the embodiment, the second guide rail R2 is installed by being transported along the first guide rail R1, It is possible to complete the construction of the guide rail R by repeating the operation of feeding the third guide rail along the second guide rail R2.

After the installation of the guide rail R is completed, the bridge construction equipment 10 according to the embodiment can load the upper panel G to be installed and travel along the installed guide rail R.

At this time, the upper panel G is moved to a position where the upper panel G is to be installed or to a position where the upper panel G is to be installed after the position where the upper panel G is to be installed in the space between the guide rails R, Can be installed in a space between the guide rails (R).

After the installation of the guide rail R and the top plate G is completed by the bridge construction equipment 10 according to the embodiment, the bridge construction equipment 10 according to one embodiment is replaced with a movable scaffold, It is natural that concrete can be installed by the method.

The bridge construction equipment 10 according to one embodiment of the present invention can horizontally pull the guide rail R and the upper plate G necessary for the bridge construction and install the bridge in a fixed position, And can be constructed independently from the influence of the marine climate, so that the air shortening of the guide rail and the upper plate of the long bridge can be induced. And the guide rail becomes a transport channel of the upper plate when the upper plate is constructed and can become a part of the bridge structure after completion of the bridge construction.

The bridge construction apparatus 10 according to one embodiment of the present invention has been described, and a bridge construction method using the bridge construction apparatus according to one embodiment will be described below.

FIG. 4 is a flowchart showing a bridge construction method according to an embodiment. FIGS. 5A to 5I illustrate a bridge construction process according to a bridge construction method according to an embodiment. FIGS. 6A to 6E show guide rails And the upper plate is installed on the guide rail.

In the bridge construction method according to one embodiment, all cables are installed in the construction of a bridge such as a marine suspension bridge, and then the top board manufactured at the starting point of the bridge can be horizontally pulled to the installation point and installed in the correct position.

With reference to Fig. 4, a bridge can be constructed as follows briefly.

First, the pylon is installed so as to be spaced from the ground (S10), and a cable and a beam are installed between the ground and the pylon (S20). Then, a plurality of guide rails are coupled to the cross beams (S30), and an upper plate is installed on the guide rails (S40).

Specifically, referring to Figs. 5A to 5I, concrete can be constructed as follows.

As shown in Fig. 5A, the pylon (A1, A2) is installed so as to be spaced from the ground (O).

At this time, it is a matter of course that a cable, a beam, a guide rail, a top plate and the like necessary for installing a bridge can be loaded on the ground O, and the ground O can be an anchorage of a bridge or a suspension bridge.

The first main tower A1 is spaced apart from the ground O and the second main tower A2 is spaced apart from the first main tower A1 to form the ground O and the first main tower A1, And the second main tower (A2).

Although the first main tower A1 and the second main tower A2 are illustrated as being one in the drawing, it is to be understood that the first main tower A1 and the second main tower A2 may be constituted by a pair of first main tower A1 and a pair of second main tower A2, Do. Although the first main tower A1 and the second main tower A2 are shown in the drawing, the third main tower A3 may be further provided so as to be spaced apart from the second main tower A2.

A guide cable GC is provided between the upper end of the first main tower A1 and the upper end of the second main tower A2 and the guide cable GC is provided between the ground O and the upper end of the first main tower A1, The first cable C1 or the outermost cable is installed.

At this time, bending of the main tower can be prevented by canceling the bending moment acting on the main tower, which can be generated by the asymmetrical construction procedure when the guide rail is installed by the guide cable (GC).

As shown in FIG. 5C, the guide rail R is received from the ground O and installed from the outside of the ground O. As shown in FIG. The guide rail R can be installed using the above-described bridge construction apparatus.

At this time, since the first cable C1 and the second cable C2 are provided at both ends of the guide rail R, the first cable C1 or the second cable C2 is pre-tensioned so that the shape of the bridge I can catch you.

As shown in Fig. 5D, the cable and guide rail installation is repeated from the ground O toward the first main tower A1.

As shown in FIG. 5E, the main spindle is also installed in the same direction as the previous installation direction or the hypothetical direction.

5f, when the guide rail R of the main shaft portion becomes two or the guide rail R passes the first main tower A1 and becomes the second guide rail R, (G) from the part.

The cable C is installed from the first main tower A1 toward the second main tower A2 and the ground O or the second main tower A2 is taken out from the first main tower A1 as shown in Fig. The upper plate G is installed.

As shown in FIG. 5H, when the load acting on the first main tower A1 is symmetric by the cable C, the guide cable GC is removed.

At this time, the cable C, the guide rail R, and the upper panel G may be arranged symmetrically with respect to the first main tower A1.

5I, when the installation of the upper panel G is completed, the cable C, the guide rail R and the upper panel G are also installed in the second main tower A2 in the same manner.

For example, if it is possible to supply the cable C, the guide rail R and the top board G on both sides of the bridge, the bridge construction time can be further shortened and can be made symmetrical around the span .

Although the cable-stayed bridge is described here as an example, it is natural that the suspension bridge can also be constructed in the same way.

In particular, referring to Figs. 6A to 6E, a guide rail can be coupled to a cable and a beam, and an upper plate can be installed on a guide rail as follows.

As shown in Fig. 6A, the first cable C1 is connected to both ends of the first cross beam B1.

At this time, additional guide rails on which the above-described bridge construction equipment is placed can be disposed, and the first cross beam B1 can be connected to the end of the additional guide rail on the outside of the ground or the ground.

One end of the first cable C1 is connected to both ends of the first crossbar B1 and the other end of the first cable C1 is connected to the other end of the main cable B1. (Not shown).

Although not specifically shown, it is of course possible that separate equipment for installing the cable and the beam can be placed on the ground or moved on the installed guide rail.

As shown in FIG. 6B, the first guide rail R1 is engaged at a position spaced from both ends of the first cross beam B1 by using the above-described bridge construction equipment.

At this time, the first cable C1 can be pre-tensioned.

As shown in Fig. 6C, the second guide rail R2 is also installed in the same manner.

Specifically, the second cross beam B2 is provided at the end of the first guide rail R1, the second cable C2 is installed at the second cross beam B2, and then the above- And the second guide rail R2 is transported on the rail R1 toward the end of the first guide rail R1. When the second guide rail R2 reaches the end of the first guide rail R1, the second guide rail R2 is engaged with the end of the first guide rail R1.

6D when the installation of the guide rail R, the cable (not shown), and the cross beam B is completed.

6E, when the installation of the guide rails R is completed, the upper plate G is installed on the guide rails R. As shown in Fig. The upper panel G can be transported by the above-described bridge construction equipment, and the upper panel G can be installed from the main tower portion.

In this way, the bridge construction method according to one embodiment can complete the bridge without using any marine equipments after the cable is installed, thereby making it possible to construct the bridge independently from the influence of the marine climate without obstructing the maritime traffic Do.

The guide rail can be installed using the above-described bridge construction equipment, and the guide rail can be installed by using the above-described bridge construction equipment after the guide rail is installed, and the air shortening can be realized .

In addition, it is possible to secure the wind stability similar to the completed bridge by installing the top plate after completing the guide rail, and it is also possible to move and install the upper plate even under strong wind, and the load by the upper plate is transmitted directly to the cable So that only the axial force due to the cable tension acts on the guide rail, so that the possibility of buckling of the guide rail can be prevented. Also, the loads received by the top plate and the guide rail are independent, and numerical analysis of the bridge can be easily performed.

Although the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And various modifications and changes may be made thereto without departing from the scope of the present invention. Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the claims set forth below, fall within the scope of the present invention.

10: Bridge construction equipment
100: frame
200: First conveying section
300: Second transfer part

Claims (9)

A frame movable on the first guide rail;
A first conveying unit disposed at the center of the frame for conveying the upper plate; And
A second conveying unit disposed on both sides of the frame for conveying the second guide rail;
Lt; / RTI >
Wherein the second guide rail is transported toward an end of the first guide rail and connected to an end of the first guide rail.
The method according to claim 1,
The frame includes:
A central frame in which the first transfer part is disposed; And
A front frame connected to a front of the center frame and having the second conveying part disposed therein;
/ RTI >
The upper plate is held below the center frame,
Wherein the second guide rail is held below the front frame.
3. The method of claim 2,
The first conveying portion,
A central holding member connected to both sides of the center frame;
Lt; / RTI >
Wherein the central gripping member grips a portion adjacent to an edge of the top plate.
3. The method of claim 2,
Wherein the second conveying portion comprises:
A front grasping member connected to both sides of the front frame;
Lt; / RTI >
Wherein the front gripping member grips a central portion of the second guide rail.
5. The method of claim 4,
The frame includes:
A rear frame connected to the rear of the center frame and having the second conveying part disposed therein;
Further comprising:
Wherein the second conveying portion comprises:
A rear gripping member connected to both sides of the rear frame;
The bridge construction equipment further comprising:
6. The method of claim 5,
A roller is mounted on a lower surface of the frame,
Wherein the roller is disposed at a connecting portion between the center frame and the front frame and a connecting portion between the center frame and the rear frame,
Wherein the frame is provided in a shape symmetrical to each other in the front-rear direction or in the lateral direction.
Installing a pylon so as to be spaced from the ground;
Providing a cable and a beam between the ground and the pylon;
Coupling a plurality of guide rails to the beam; And
Installing a top plate on the guide rail;
Lt; / RTI >
The cable is connected to both ends of the beam,
Wherein the plurality of guide rails are coupled to a position spaced apart from both ends of the beam.
8. The method of claim 7,
In the step of constructing the pylon so as to be separated from the ground,
A plurality of pylons are constructed,
A guide cable is installed between the plurality of pylons,
Wherein the guide cable is removed when the load acting on the main tower is symmetrical.
8. The method of claim 7,
In the step of installing the upper plate on the guide rail,
Wherein the upper plate starts to be installed when the guide rail passes through the main tower and becomes a second guide rail, and the upper plate is installed from the main tower toward the ground.

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