JP2020159132A - Method for replacing horizontal material at bending point of steel tower - Google Patents

Abstract

To provide a method for replacing a horizontal member at a bending point of a steel tower, which can suitably release the stress of the horizontal member when removing the horizontal member at the bending point by a plat structure.SOLUTION: The method for replacing a horizontal member at a bending point of a steel tower of the present invention is configured so that in a method for replacing a horizontal member at a bending point P of a steel tower 100 in which the stress of a horizontal member 106 is released and the horizontal member 106 is replaced by forming a plat structure Z using an oblique jig 200 and a horizontal jig 300, the plat structure Z is formed above and below the horizontal member 106 arranged horizontally at the bending point P of the tower 100, and at least one horizontal jig 300 of the upper and lower plat structure Z is placed in the vicinity of the horizontal member 106 at the bending point P.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for exchanging a horizontal member at a bending point of a steel tower in which the stress of the horizontal member is released and the horizontal member is exchanged by constructing a platform structure using an oblique jig and a horizontal jig.

In a transmission tower (hereinafter simply referred to as a tower), the frame of the tower body is composed of main pillars, abdominal materials, etc., and the transmission line is laid on the arm that extends horizontally from the main pillars. .. When the strength of the abdominal material (also called diagonal material) decreases due to aging due to aging, etc., it is necessary to replace the abdominal material. As a method for exchanging the abdominal material, for example, there is a method using a slanted material exchanging device for a steel tower disclosed in Patent Document 1.

When the diagonal member exchange device of Patent Document 1 is used, first, the first sandwiching member and the second sandwiching member are fixed in the vicinity of the positions where one end and the other end of the diagonal member are connected to each other in the main pillar material. .. Then, the first sandwiching member and the second sandwiching member are connected by the connecting member, and the length of the connecting member arranged along the diagonal member is adjusted by expansion and contraction. As a result, a tensile load is gradually generated on the connecting member, and the tensile load acting on the diagonal member is gradually reduced. Then, when the tensile load of the diagonal member becomes zero, the expansion / contraction adjustment is completed, and the diagonal member is replaced with a new one.

Patent No. 5787400

The diagonal member exchange device of Patent Document 1 is a jig for exchanging a belly member (oblique member). As a method of exchanging the horizontal member, a construction method using a horizontal jig in addition to an oblique jig such as the oblique member exchanging device of Patent Document 1 has been conventionally performed. In such a construction method, a horizontal jig is attached to the main pillar material above and below the horizontal member, and a diagonal jig is attached to the main pillar material between the upper and lower horizontal jigs to form a plat structure. Then, the distortion of the tower is corrected by the diagonal jig, and the compressive stress generated in the horizontal member at that time is canceled by the horizontal jig. As a result, the stress applied to the horizontal member is released, and the abdominal member and the horizontal member can be replaced.

FIG. 4 is a diagram illustrating the removal of the horizontal member at the bending point by the conventional method. Here, the steel tower has a bending point in which the root opening is wide in the lower part, but the root opening is narrowed in the middle position in the height direction, and a horizontal member is also arranged at this bending point. However, it is difficult to replace the horizontal member arranged at this bending point by the above-mentioned conventional method.

Specifically, as shown in FIG. 4, the diagonal jig 200 is arranged along the abdominal member 104 to correct the distortion of the steel tower 100. Then, the horizontal jig 300 is arranged above and below the diagonal jig 200. The platform Z is composed of the diagonal jig 200 and the horizontal jig 300. This is the arrangement of the prior art, in which the diagonal jig 200 is arranged so as to cross the horizontal member 106 at the bending point P.

However, when the horizontal member was removed with the platform structure configured, an event occurred in which the contacts moved inward. It is highly probable that this is because the horizontal member is stressed by the loading of the diagonal jig, and the displacement occurs at the time of removal. When the contacts move, the abdominal material cannot be removed, and new horizontal or abdominal material cannot be attached.

In view of such a problem, the present invention provides a method for replacing a horizontal member at a bending point of a steel tower, which can suitably release the stress of the horizontal member when removing the horizontal member at the bending point by a plat structure. I am aiming.

In order to solve the above problems, a typical configuration of the present invention is to construct a platform structure using an oblique jig and a horizontal jig to release the stress of the horizontal member and bend the iron tower to replace the horizontal member. In the point horizontal member replacement method, a plat structure is formed above and below the horizontal member horizontally arranged at the bending point of the steel tower, and at least one horizontal jig of the upper and lower plat structure is placed near the horizontal member at the bending point. It is characterized by being arranged.

According to the above configuration, a horizontal jig is arranged in the vicinity of the horizontal member horizontally arranged at the bending point of the steel tower, and the platform structure is constructed by using the horizontal jig. Therefore, the diagonal jig used for the plat structure does not cross the horizontal member. Therefore, when the strain of the tower is corrected by the diagonal jig, the stress in the tower direction applied to the horizontal member can be significantly reduced. Therefore, it is possible to prevent the contact points from being displaced when the horizontal member is removed, and to preferably replace the horizontal member.

It is preferable to place both horizontal jigs of the upper and lower plats in the vicinity of the horizontal member at the bending point. In other words, two horizontal jigs may be placed both above and below the bending point. According to this configuration, the stress applied to the horizontal member can be dispersed between the two horizontal jigs, so that a compact and lightweight horizontal jig having a low axial force can be used.

In order to solve the above problem, another configuration of the present invention is a horizontal member of an iron tower in which the stress of the horizontal member is released and the horizontal member is replaced by forming a platform structure using an oblique jig and a horizontal jig. In the replacement method, a horizontal jig is placed near the horizontal member horizontally arranged at the bending point of the steel tower, diagonal jigs are placed above and below the horizontal member at the bending point, and above the upper diagonal jig and By further arranging the horizontal jig below the lower diagonal jig, a plat structure is formed above and below the horizontal member at the bending point, and the horizontal member is replaced while the stress of the horizontal member at the bending point is released. It is characterized by that. Even with such a configuration, the same effect as the method for replacing the horizontal member of the steel tower described above can be obtained.

In order to solve the above problem, another configuration of the present invention is a horizontal member of an iron tower in which the stress of the horizontal member is released and the horizontal member is replaced by forming a platform structure using an oblique jig and a horizontal jig. In the replacement method, horizontal jigs are placed near both the upper and lower sides of the horizontal member horizontally placed at the bending point of the iron tower, and diagonally healed above the upper horizontal jig and below the lower diagonal jig. By arranging the tools and further arranging the horizontal jigs above the upper diagonal jig and below the lower diagonal jig, a plat structure is formed above and below the horizontal member at the bending point, and the bending point is formed. It is characterized in that the horizontal member is replaced while the stress of the horizontal member is released. Even with such a configuration, the same effect as the method for replacing the horizontal member of the steel tower described above can be obtained.

According to the present invention, it is possible to provide a method for exchanging a horizontal member at a bending point of a steel tower, which can suitably release the stress of the horizontal member when removing the horizontal member at the bending point by a plat structure.

It is a figure explaining the horizontal material exchange method of the bending point of the steel tower which concerns on this embodiment. It is a figure explaining the diagonal jig and the horizontal jig. It is a figure explaining another example of the horizontal member exchange method of the bending point of the steel tower which concerns on this embodiment. It is a figure explaining the removal of the horizontal member of a bending point by a conventional method.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in such an embodiment are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are designated by the same reference numerals to omit duplicate description, and elements not directly related to the present invention are not shown. To do.

FIG. 1 is a diagram illustrating a method of replacing a horizontal member (hereinafter, simply referred to as a replacement method) of a bending point of a steel tower 100 according to the present embodiment. FIG. 2 is a diagram illustrating an oblique jig 200 and a horizontal jig 300. FIG. 2A is a diagram for explaining the diagonal jig 200, and FIG. 2B is a diagram for explaining the horizontal jig 300.

As shown in FIG. 1, in the steel tower 100, the main landing gear 102 is arranged as an aggregate in the height direction, and the adjacent main landing gear 102 are arranged obliquely in the abdominal material 104 (oblique member). , And are connected by horizontal members 106 arranged in the horizontal direction. The steel tower 100 has a bending point P in which the root opening is wide in the lower part but the root opening is narrowed in the middle position in the height direction, and the horizontal member 106 is also arranged at this bending point P.

In the replacement method of the present embodiment, the horizontal member 106 is replaced by releasing the stress of the horizontal member 106 by forming the two plats quite Z by using the diagonal jig 200 and the horizontal jig 300. At that time, the plat structure Z is formed above and below the horizontal member 106 horizontally arranged at the bending point P of the steel tower 100, and at least one of the horizontal jigs 300 of the upper and lower plat structure Z is arranged in the vicinity of the horizontal member 106. To do.

Specifically, as shown in the enlarged view in the circle of FIG. 1, the horizontal jig 300 is arranged in the vicinity of the horizontal member 106 which is horizontally arranged at the bending point P of the steel tower 100, and is oblique to the top and bottom of the horizontal member 106. The jig 200 is arranged. Then, the horizontal jig 300 is further arranged above the upper diagonal jig 200 and below the lower diagonal jig 200. As a result, a Z-shaped platform Z is formed on the upper side of the horizontal member 106, including the horizontal jig 300 in the vicinity thereof as the lower side, and the diagonal jig 200 and the horizontal jig 300. Further, on the lower side of the horizontal member 106, a horizontal jig 300 in the vicinity thereof is included as an upper side, and a Z-shaped plat structure Z composed of an oblique jig 200 and a horizontal jig 300 is formed. That is, the horizontal jig 300 arranged in the vicinity of the horizontal member 106 constitutes two plats quite Z above and below the horizontal member 106.

As shown in FIG. 2A, the diagonal jig has a pair of holding portions 210a and 210b. The pair of holding portions 210a and 210b are fixed to two adjacent main landing gear 102, respectively. Telescopic portions 220a and 220b are arranged between the pair of holding portions 210a and 210b, and a turnbuckle 230 is arranged between the telescopic portions 220a and 220b and the sandwiching portion 210b. When the diagonal jig 200 is attached between the two main landing gears 102, the holding portions 210a and 210b are fixed to the main landing gear 102 with the widths adjusted by the telescopic portions 220a and 220b. Then, the widths of the telescopic portions 220a and 220b are determined by inserting a pin or the like into the fixing hole 222. In this state, the strain of the tower 100 can be corrected by applying a tensile load to the two main landing gears 102 by the turnbuckle 230.

As shown in FIG. 2B, the horizontal jig 300 has a pair of holding portions 310a and 310b. The pair of holding portions 310a and 310b are fixed to two adjacent main landing gears 102, respectively. Telescopic portions 320a and 320b are arranged between the pair of sandwiching portions 310a and 310b, and turnbuckles 330a and 330b are arranged on both sides of one sandwiching portion 310b. When the horizontal jig 300 is attached between the two main landing gears 102, the holding portions 310a and 310b are fixed to the main landing gear 102 with the widths adjusted by the telescopic portions 320a and 320b.

Then, the widths of the telescopic portions 320a and 320b are determined by inserting a pin or the like into the fixing hole 322. By rotating 330a and 330b on the turnbuckle in this state, a tensile load (force in the pulling direction) or a compressive load (force in the separating direction) can be applied to the two main landing gears 102. As a result, the horizontal jig 300 can receive the stress applied to the horizontal member 106 when the strain of the tower 100 is corrected by the diagonal jig 200 described above.

As shown in the enlarged view in the circle of FIG. 1, the horizontal jig 300 is arranged in the vicinity of the horizontal member 106 arranged horizontally at the bending point P of the iron tower 100, and the horizontal jig 300 is used to arrange the horizontal member 106. By configuring the plat structure Z above and below, the diagonal jig 200 used for the plat structure Z does not cross the horizontal member 106. Therefore, when the strain of the tower 100 is corrected by the diagonal jig 200, the stress in the tower direction applied to the horizontal member 106 can be significantly reduced. Therefore, it is possible to prevent the contact points from being displaced when the horizontal member 106 is removed, and to preferably replace the horizontal member 106.

FIG. 3 is a diagram illustrating another example of a method for replacing a horizontal member at a bending point of a steel tower 100 according to the present embodiment. In the example shown in FIG. 3, the horizontal jig 300 is arranged in the vicinity of both the upper and lower sides of the horizontal member 106 which is horizontally arranged at the bending point P of the steel tower 100. Then, the diagonal jig 200 is arranged above the upper horizontal jig 300 and below the lower diagonal jig 200, respectively, and above the upper diagonal jig 200 and below the lower diagonal jig 200. By further arranging the horizontal jigs 300 in each of them, the plats quite Z are formed above and below the horizontal member 106.

That is, in the example shown in FIG. 3, the two plat mechanisms formed above and below the horizontal member 106 at the bending point P are not formed by the common horizontal jig 300 but by separate horizontal jigs 300. According to this configuration, the stress applied to the horizontal member 106 can be dispersed to the two horizontal jigs 300, so that a compact and lightweight horizontal jig having a low axial force can be used.

Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such an embodiment. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. Understood.

The present invention can be used as a method for replacing a horizontal member at a bending point of a steel tower.

100 ... Iron tower, 102 ... Main leg material, 104 ... Abdominal material, 106 ... Horizontal material, 200 ... Diagonal jig, 210a ... Holding part, 210b ... Holding part, 220a ... Telescopic part, 220b ... Telescopic part 222 ... Fixing hole , 230 ... Turnbuckle, 300 ... Horizontal jig, 310a ... Holding part, 310b ... Holding part, 320a ... Telescopic part, 320b ... Telescopic part, 322 ... Fixed hole, 330a ... Turnbuckle, 330b ... Turnbuckle, P ... Bending Point, Z ... Pratt is fine

Claims (4)

In the method of exchanging the horizontal material at the bending point of the steel tower, the stress of the horizontal material is released by constructing the platform structure using the diagonal jig and the horizontal jig.
The plat structure is formed above and below the horizontal member horizontally arranged at the bending point of the tower.
A method for exchanging a horizontal member at a bending point of a steel tower, wherein at least one horizontal jig of the upper and lower platforms is arranged in the vicinity of the horizontal member at the bending point. The method for exchanging horizontal members at a bending point of a steel tower according to claim 1, wherein both the horizontal jigs of the upper and lower plats are arranged in the vicinity of the horizontal member at the bending point. In the method of exchanging the horizontal material at the bending point of the steel tower, the stress of the horizontal material is released by constructing the platform structure using the diagonal jig and the horizontal jig.
The horizontal jig is placed in the vicinity of the horizontal member that is horizontally placed at the bending point of the tower.
The diagonal jig is placed above and below the horizontal member at the bending point.
By further arranging the horizontal jig above the diagonal jig on the upper side and below the diagonal jig on the lower side, a plat structure is formed above and below the horizontal member at the bending point.
A method for replacing a horizontal member at a bending point of a steel tower, which comprises replacing the horizontal member with the horizontal member at the bending point released. In the method of exchanging the horizontal material at the bending point of the steel tower, the stress of the horizontal material is released by constructing the platform structure using the diagonal jig and the horizontal jig.
Horizontal jigs are placed near both the top and bottom of the horizontal member that is horizontally placed at the bending point of the tower.
The diagonal jig is arranged above the horizontal jig on the upper side and below the diagonal jig on the lower side.
By further arranging horizontal jigs above the diagonal jig on the upper side and below the diagonal jig on the lower side, a platform structure can be formed above and below the horizontal member at the bending point.
A method for replacing a horizontal member at a bending point of a steel tower, which comprises replacing the horizontal member with the horizontal member at the bending point released.

Images