JP3091146B2 - Replacing the main pillar of a steel tower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for replacing a main pillar of a steel tower such as a transmission line.

[0002]

2. Description of the Related Art In general, an angle material or a steel pipe is used as a main pillar material in a steel tower such as a transmission line, and a steel tower is constructed by assembling the angle material and the steel pipe vertically. And when these towers are installed especially in the factory zone or near the coastline such as oil refineries and steelworks, the main pillars of the tower are affected by the exhaust gas and salt damage discharged from the factory, Particularly in the case of steel pipes, damage such as corrosion may occur on the outside and inside of the steel tower due to long-term operation. At present, if such damage is found early by daily inspection by means such as imaging of the inside of the steel pipe, the damaged main column material will be replaced promptly and always safe. A system is adopted in which power is transmitted in a form.

[0003]

However, the replacement of the main pillars in a tower such as a power transmission line requires a large load on the main pillars due to the weight of the overhead wire and the tower itself. From the point of view, the replacement work of the main pillar material in the energized state is only partially seen in the angle pylon, and it is not usually performed, especially in the case of steel pipe pylon,
It has not been implemented so far. For this reason, there has been a demand for a new technology development capable of performing the replacement work of the main pillar material in an energized state while ensuring sufficient safety.

Therefore, in the present invention, the use of simple work equipment that is easy, reliable, and safe to install on a steel tower enables the replacement work of the main pillar material in the energized state, thereby eliminating the restriction on the construction time. To provide a useful method of replacing the main pillar of a steel tower.

[0005]

Therefore, according to the present invention, a support member mounting base and a jack receiving base of a divided band type are provided on the main column members located above and below the main column member to be replaced. Are installed, and at least a jack is inserted between the support mounting table and the jack support.
The three supporting members are pivotally supported by a U bracket , are held by a holding frame connecting the supporting members, and the jacks are operated to extend the plurality of supporting members. After extracting the main pillar material, a new main pillar material is arranged and assembled. Further, in the present invention, the support member mounting base and the jack receiving base are:
It is characterized by being installed so as to overlap with the joints or diagonal gussets of the main pillars located at the upper and lower parts of the main pillar to be replaced, and these are used as a means to solve the problem These are the means for solving the problems.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment of a method of replacing a main column material of a steel tower according to the present invention. FIG. 1 is a schematic perspective view of a steel pipe tower, and FIG. 2 is a vicinity of a main column material of a steel pipe to be replaced. FIG. 3 is an enlarged perspective view of a portion A and a portion B of FIG. 1, and FIG. 4 is an enlarged side view of the vicinity of a main column material of a steel pipe to be replaced, and is an explanatory view of horizontal member replacement. As shown in FIG. 1, when a part of a steel pipe tower such as a power transmission line is found to be damaged by daily inspection by means such as imaging of the inside of the steel pipe, the damaged main column material is replaced. Must be done promptly. FIG. 1 shows a steel pipe tower consisting of four pillars a to d (not shown), which is adjacent to the steel pipe burial just above the steel pipe buried pillar buried in the concrete foundation pillar 7 at the pillar a. Damaged spot was found on steel pipe main column material a1,
Shows how the replacement work of the steel pipe main column material a1 is performed,
At the upper and lower portions of the steel pipe main pillar material a1 to be replaced, the steel pipe main pillar material a2 located via the flange joints 4 and 4 and the buried pillar 7A (in this example, the foundation pillar 7 in which the buried pillar is buried). , Support material mounting base 2 of divided band system
And a jack support 3 are respectively installed, and a plurality of (three in this example) support materials and a three-way support material 1 are arranged between the support material mounting base 2 and the jack support 3 with a jack 6 interposed therebetween. After each of the jacks 6 is actuated to extend the plurality of support members 1 to form a gap in the flange joint 4 which is the main column material connecting portion, and after the steel pipe main column material a1 to be replaced is extracted, It is to be replaced with a new steel pipe main column material and then assembled.

[0007] Referring to FIGS. 2 and 3 in detail, the steel pipe main column member a1 to be replaced in the column base a1 will be described.
The lower end is connected via a flange joint 4 to a steel pipe buried pillar 7A buried in a concrete foundation pillar 7 installed in the ground. An adjacent steel pipe main column member a2 is connected to an upper end portion of the steel pipe main column member a1 via a flange joint 4, and similar steel pipe main column members are sequentially connected to an upper portion to form an a-column base of a steel tower. ing. Since the columns b to d have the same configuration, the description will be omitted. As clearly shown in FIG. 1, a large number of diagonal members (belly members) 8 and horizontal members 9 are arranged between the pillar a and the pillar d to form a reinforcing member of the tower. ing. At the lower end of the pillar a as a base of the steel tower, a concrete base pillar 7 is installed in the ground in the shape of a quadrangular pyramid that is partially exposed to a concave part dug on the ground and spread downward. A buried pillar 7 </ b> A constituting a lowermost steel pipe main pillar material is buried in the foundation pillar 7.

In order to replace the steel pipe main pillar a1 with a new steel pipe main pillar by the replacement method of the present invention when damage is found on the steel pipe main pillar a1 in the column base a having such a configuration, first, FIGS. As shown in FIG. 3A, which is an enlarged perspective view of the portion A, an appropriate portion of the steel pipe main pillar a2 adjacent to the upper part of the steel pipe main pillar a1 to be replaced via the flange joint 4, In the present embodiment, the support material mounting base 2 is placed so as to overlap with the lower end portion of the diagonal material gusset 5 installed to attach the diagonal material 8 to the column a. The supporting member mounting base 2 is divided into two parts at a diameter position and has a flange-shaped mounting band 1.
0 forms a cylindrical body integrally connected by a number of bolts and nuts 11. Two mounting wings 12, 12 extending in the axial direction at a circumferential angle of 120 ° are implanted on one of the support mounting bases 2A, and one mounting wing 12 is mounted on the other support mounting base 2B. Implanted, these three mounting wings 12
Form a 120 ° circumferential angle with each other. Each of these mounting wings 1
The U-shaped bracket 13 provided on the upper end of the supporting members 1A, 1B and 1C described later is supported by the shaft 2. Each support material mounting base 2
Disk-shaped flanges (stiffeners) 20 and 20 are provided at the upper ends of A and 2B, and abut against the lower ends of the diagonal gussets 5.

Next, as shown in FIG. 3B, which is an enlarged perspective view of a portion B in FIGS. 1 and 2, a lower portion of the steel pipe main column member a1 to be replaced is adjacent via a flange joint 4. The jack cradle 3 is placed so as to be in contact with an appropriate portion of the buried pillar 7A, which is a steel pipe main pillar material, in this embodiment, so as to come into contact with the pyramidal surface of the side face of the foundation pillar 7 in which the buried pillar 7A is buried. The jack cradle 3 is composed of components 3A, 3B, 3C and 3D divided into four parts at four side positions, and a flange-like mounting band 14 standing upright at the boundary between them.
And are integrally connected by a number of bolts and nuts 11 to form a quadrilateral hat lacking a head. A U fitting 15 on which jacks 6A, 6B and 6C to be described later are pivotally mounted is attached to the horizontal portions of the components 3B, 3C and 3D. The positions where these U fittings 15 are attached are also 1
Make a circumferential angle of 20 °.

In this manner, the steel pipe main column members a2 located above and below the steel pipe main column members a1 to be replaced.
In addition, the support member mounting base 2 and the jack receiving base 3 of the divided band type are easily and reliably installed on the buried column 7 as if they were simply clamped from both diametrical sides of the steel pipe main column having a circular cross section. Subsequently, the jacks 6A, 6B are inserted between the respective mounting wings 12 in the supporting member mounting base 2 and the U fittings 15 in the jack receiving base 3.
And 6C (in this embodiment, one by one)
Three) fork supporting material 1A, 1B having a circumferential angle of 20 °
And 1C, and the three jacks 1A to 1C are extended by operating the jacks 6A to 6C by the hydraulic pump 19 and the like, and the upper and lower connecting portions of the main pillar a1 to be replaced After the flange joint 4 is formed by adjusting the gap enough to remove the main column member a1, after removing the steel pipe main column member a1 to be replaced by loosening the connecting bolts and nuts of the flange joint 4, It is to be replaced with a new steel pipe main column material and then assembled. At this time, as the jacks 6A to 6C elongate, the three-pronged support members 1A to 1C are stretched, the support member mounting base 2 abuts on the diagonal gusset 5, and the jack receiving base 3 is a pyramidal surface on the side surface of the base pillar 7. However, the pyramidal surface of the side surface of the base pillar 7 is formed thick at the bottom, and the downward movement of the jack cradle 3 can be reliably prevented. In addition, as clearly shown in FIG.
The diagonal member 8 and the horizontal member 9 connected to the steel pipe main column member a1 to be replaced are separated from the gussets connecting them in advance (simultaneously with the step of loosening the connection bolts and nuts of the upper flange joint 4). Have been. When the steel pipe main column material a1 to be replaced is long and the support member 1 is also long, the support member 1 is connected by a plurality of support member flanges 17 and 17 as clearly shown in FIG. In addition, a holding frame 16 including three connecting pieces 16A, 16B, and 16C for connecting the three supporting members 1A, 1B, and 1C is provided at an appropriate intermediate position to prevent buckling of the supporting member 1. You may.

FIG. 4 illustrates a method for treating the horizontal member 9 stretched between the ad column bases during the replacement work of the steel pipe main column member a1. In removing the steel pipe main column member a1, when the horizontal member 9 is removed from the gusset of the steel pipe main column member a1 at a portion where only a single horizontal member 9 is connected (arrow G in FIG. 4), the cantilever is removed. The horizontal member 9 has a connecting plate 18 at a substantially intermediate portion of the horizontal member 9 that intersects the diagonal members 8 and 8 so that the horizontal member 9 is replaced in advance. With this configuration,
Even when the horizontal member 9 is removed from the steel pipe main column member a1 at the portion indicated by the arrow G, the horizontal member 9 is maintained at the original position without falling off, and the connecting gusset of the new steel pipe main column member a1 after the replacement of the steel pipe main column member a1. The horizontal member 9 can be easily reconnected.

FIGS. 5 to 7 show a second embodiment of the present invention. FIG. 5 is a schematic explanatory view of an angle tower, and FIG. 6 is an enlarged side view near an angle main column to be replaced. ,
FIG. 7 is an enlarged perspective view of a portion C and a portion D in FIG. FIG.
, The structure of the angle tower is a truss structure, which is similar to the structure of the steel pipe tower of FIG. 1 described above, but the cross-sectional shape of the main pillar is different. Angle main column material immediately above the angle buried column buried in the concrete foundation column 7 at the column b pier in the angle pylon consisting of four column piers of ad column base (d column base is not shown) FIG. 4B shows a state in which a damaged portion is found in b1 and replacement work of the angle main pillar material b1 is performed, and angles located at upper and lower portions of the angle main pillar material b1 to be replaced via lap joints 35 and 35; Main pillar material b
2, buried pillar 7B (in this example, foundation pillar 7 buried buried pillar)
A support member mounting base 2 and a jack receiving base 3 each having a divided band system are respectively installed, and a plurality of (three in this example) are interposed between the supporting member mounting base 2 and the jack receiving base 3 via a jack 6. ), The jacks 6 are operated to extend the plurality of support members 1, and a gap is formed in the lap joint 35, which is a connecting portion of the main pillar, to be replaced. After the angle main column material b1 is extracted, it is replaced with a new angle main column material, and is assembled.

Referring to FIGS. 6 and 7 in detail, the angle main column material b1 to be replaced on the column base b is made of concrete whose lower end is installed underground via a lap joint 35. It is connected to an angle buried pillar 7B buried in the foundation pillar 7. The angled main pillars b2 adjacent to each other are connected to the upper end of the angled main pillars b1 via a lap joint 35, and the same angled main pillars are sequentially connected to the upper portion to sequentially connect the b pillars of the steel tower. It is configured.
Since the columns a, c and d have the same configuration, the description is omitted. As clearly shown in FIG.
A large number of diagonal members (belly members) 36 and horizontal members 37 are arranged between the column bases to form a reinforcing member of the steel tower. At the lower end of the column base b serving as the base of the steel tower, a concrete base pillar 7 is installed in the ground in the form of a quadrangular pyramid that is partially exposed to a concave part dug on the surface and spread downward. A buried pillar 7 that constitutes the bottom main pillar material in the foundation pillar 7
B is buried.

In the b column base having such a configuration, damage to the angle main column material a1 is found, and the damage is found to be replaced with a new angle main column material by the replacement method of the present invention.
First, FIG. 7 is an enlarged perspective view of a portion C in FIGS.
As shown in (A), a suitable portion of the angle main column member b2 adjacent to the upper portion of the angle main column member b1 to be replaced via the lap joint 35, in the present embodiment, the diagonal member 3
6 are attached to the lower end of the diagonal member gusset 38 installed to attach the column 6 to the column base b.
Is installed. The supporting member mounting base 39 is integrally connected by a large number of bolts and nuts 11 by an angled mounting band divided into two parts. One of the support material mounts 39
Two mounting wings 41, 41 extending in the axial direction at a circumferential angle of 120 ° are planted in 9A, and one mounting wing 41 is planted in the other support material mounting base 39B, and these three mounting wings are planted. 4
1 make a circumferential angle of 120 ° with each other. U fittings 13 provided at the upper ends of the supporting members 1A, 1B, and 1C are pivotally supported by these mounting wings 41. Each support material mounting base 39A,
Triangular flange (stiffener) 4 at the upper end of 39B
0 and 40 are provided.

Next, as shown in FIG. 7B, which is an enlarged perspective view of a portion D in FIGS. 5 and 6, the lower portion of the angle main pillar member b1 to be replaced is adjacent to the lower portion of the angle main pillar member b1 via a lap joint 35. Appropriate part of the embedded pillar 7B which is the angle main pillar material,
In this embodiment, the jack cradle 3 is overlapped with the buried pillar 7B so as to come into contact with the pyramidal surface of the side face of the foundation pillar 7 in which the buried pillar 7B is buried.
Is installed. The jack cradle 3 is composed of components 3A, 3B, 3C and 3D divided into four at four side positions,
They are integrally connected by a large number of bolts and nuts 11 by flange-like mounting bands 14 erected at the boundaries thereof, and have the appearance of a quadrangular hat lacking a head. U fittings 15 on which jacks 6A, 6B and 6C to be described later are pivotally supported are provided on the horizontal portions of the structures 3B, 3C and 3D.
Is attached. The positions where these U fittings 15 are attached also form a circumferential angle of 120 ° with each other.

In this manner, the angled main pillar b2 and the buried pillar 7, which are located above and below the angled main pillar b1 to be replaced, are divided into the band-type support member mounting base 39 and the jack. The cradle 3 can be easily and reliably installed as if simply sandwiched from both axial sides of the angle main pillar material.
A plurality of jacks 6A, 6B, and 6C are provided between each mounting wing 41 of the support member mounting base 39 and the U fitting 15 of the jack receiving base 3 (in the present embodiment, each of them is 12 pieces).
The three fork supporting members 1A, 1B, and 1C having a circumferential angle of 0 ° are arranged, and the jacks 6A to 6C are operated by the hydraulic pump 19 or the like, and the three fork supporting members 1A to 1C are arranged. Main column material b to be replaced by extending 1C
1, the lap joint 35, which is the upper and lower connecting portion, is formed by adjusting a gap enough to remove the main column member b1, and the connecting bolts and nuts of the lap joint 35 are loosened to replace the angle main column. After the material b1 is extracted, it is replaced with a new angle main pillar material, arranged and assembled. At this time, as the jacks 6A to 6C elongate, the three-pronged support members 1A to 1C are stretched, the support member mounting base 39 abuts on the diagonal gusset 38, and the jack receiving base 3 is a pyramidal surface on the side surface of the base pillar 7. However, the pyramidal surface of the side surface of the base pillar 7 is formed thick at the bottom, and the downward movement of the jack cradle 3 can be reliably prevented. As shown in FIG. 6, the diagonal members 36 and the horizontal members 37 connected to the angled main pillar b1 to be replaced are prepared in advance from the gussets connecting them (the upper lap joint 35). At the same time as loosening the connecting bolts and nuts). When the support member 1 is also long because the angle main pillar member b1 to be replaced is long, the support member 1 is connected by a plurality of support member flanges 17 as clearly shown in FIG. In addition, a holding frame 16 including three connecting pieces 16A, 16B, and 16C for connecting the three supporting members 1A, 1B, and 1C is provided at an appropriate intermediate position to prevent buckling of the supporting member 1. You may.

FIG. 8 shows a third embodiment of the present invention. This embodiment relates to a method for replacing a steel pipe main column material when a damage is found in an intermediate portion of a steel tower, for example, a steel pipe main column material a5. An example, a supporting member 1 similar to that of the first embodiment
There is no difference in that the load applied to the steel tower when the steel pipe main column member a5 to be replaced is removed by the three-pronged support member 1 composed of A, 1B and 1C,
A supporting member mounting base 22 and a jack receiving base 23 on which the upper end and the lower end of A, 1B and 1C are pivotally supported, respectively.
Upper flange joint 4 of steel pipe main column member a6 located above steel pipe main column member a5 to be replaced and steel pipe main column member a
5 is installed so as to overlap with the lower flange joint 4 of the lower steel pipe main column member a4 located at the lower portion of the lower steel pipe 5. The supporting member mounting base 22 and the jack receiving base 23 have relatively similar structures because they are installed on a steel column main pillar having a circular cross section. The support member mounting base 22 forms a cylindrical body that is divided into two at the diameter position and is integrally connected by a number of bolts and nuts 11 by a flange-like mounting band 30. One of the support material mounting bases 22A has a circumferential angle of 1
Two mounting blades 32, 32 extending in the axial direction at 20 ° are implanted, and one mounting blade 3 is mounted on the other support member mounting base 22B.
2 are implanted, and these three mounting wings 32 are
Make a circumferential angle of °. Each mounting wing 12 has a supporting material 1
U brackets provided at the upper end portions of A, 1B, and 1C are pivotally supported. On the other hand, the jack receiving base 23 is also formed into a cylindrical body which is divided into two at the diameter position and is integrally connected by a large number of bolts / nuts 11 by a flange-shaped mounting band 34, and is formed in the same manner as the supporting member mounting base 22. Mounting wing 4
Jacks 26A each supported by a U bracket at 0
~ 26C are installed.

The three-pronged support member 1 composed of the support members 1A, 1B and 1C is disposed between the support member mounting base 22 and the jack receiving base 23 thus constituted via the respective jacks 26A to 26C, and a hydraulic pressure (not shown) is provided. Each jack 2 by pump etc.
6A to 26C are actuated and three fork supporting members 1A to 1C
The flange joint 4 as an upper and lower connecting portion of the main pillar a5 to be replaced is formed by adjusting a gap enough to remove the main pillar a5.
The connection bolts and nuts are loosened to extract the steel pipe main column material a5 to be replaced, and then replaced with a new steel pipe main column material to be assembled. The supporting member mounting base 22 and the jack receiving base 23 are located below the upper flange joint 4 of the steel pipe main column member a6 and the lower portion of the steel pipe main column member a5 located above the steel pipe main column member a5 to be replaced. The example in which the lower steel pipe main column member a4 is installed so as to overlap with the lower flange joint 4 has been described. However, by appropriately designing the connection form of the flange joints 4, the support member mounting base 22 and the jack receiving base 23 are provided. To the lower flange joint 4 of the steel pipe main column member a6 located above the steel pipe main column member a5 to be replaced and the upper flange joint 4 of the lower steel pipe main column member a4 located below the steel pipe main column member a5. It goes without saying that it is also possible to install them in an overlapping manner.

FIG. 9 shows a fourth embodiment of the present invention. This embodiment relates to a method of replacing an angle main column material when a damage is found in an intermediate portion of a steel tower, for example, an angle main column material b5. This is an example, and the load applied to the steel tower when the angled main pillar b5 to be replaced is removed by the three-pronged support member 1 composed of the same support members 1A, 1B and 1C as in the first embodiment. There is no difference in the burden,
The support pillar mounting base 44 and the jack support 45 on which the upper ends and the lower ends of the support members 1A, 1B and 1C are respectively pivotally supported are the angle main pillars located above the angle main pillar material b5 to be replaced. Upper diagonal gusset 3 of lumber b6
8 and a lower diagonal gusset 38 of the lower angle main column member b4 located below the angle main column member b5. Supporting material mounting base 44
The jack receiving stand 45 has a relatively similar structure because it is installed on the angle main pillar material. The supporting member mounting base 44 is divided into two parts at the inside and outside of the angle cross section, and is integrally connected by a large number of bolts and nuts 11 by an angled mounting band. One 44A of the support material mounting base 44
Has two mounting wings 4 extending in the axial direction at a circumferential angle of 120 °.
6 and 46 are implanted, and the other support material mounting base 44B has 1
Three mounting wings 46 are implanted, and these three mounting wings 46 form a circumferential angle of 120 ° with each other. Each of these mounting wings 46
U brackets provided at the upper end portions of the support members 1A, 1B and 1C are pivotally supported. On the other hand, the jack cradle 45 is also divided into two parts and a large number of bolts
The support member mounting base 4 is integrally connected by a nut 11.
The jacks 26A to 26C supported by U fittings are respectively installed on the mounting wings 46 formed in the same manner as in FIG.

The three-pronged support member 1 composed of the support members 1A, 1B and 1C is disposed between the support member mounting base 44 and the jack receiving base 45 thus constituted via the respective jacks 26A to 26C. Each jack 2 by pump etc.
6A to 26C are actuated and three fork supporting members 1A to 1C
Is extended to form a lap joint 35, which is an upper and lower connecting portion of the main column member b5 to be replaced, by adjusting a gap enough to remove the main column member b5. , The angle main pillar material b5 to be replaced is pulled out, replaced with a new angle main pillar material, and assembled. The supporting member mounting base 44 and the jack receiving base 45 are provided on the upper diagonal gusset 38 and the lower part of the angle main column member b5 of the angle main column member b6 located above the angle main column member b5 to be replaced. Although the example in which the lower angle main pillar member b4 is located in contact with the lower diagonal member gusset 38 has been described, by appropriately designing the connection form of the gussets 38, the support member mounting base 44 and the jack receiving base 45 are provided. Is replaced by the lower diagonal gusset 38 of the angle main column b6 located above the angle main column b5 to be replaced and the upper diagonal gusset of the lower angle main column b4 positioned below the angle main column b5. Needless to say, it is also possible to install the abutting member 38.

FIG. 10 shows a fifth embodiment of the present invention. This embodiment is different from the previous two embodiments when the steel pipe main column member a5 to be replaced is removed. This is a point that is constituted by a supporting member 1 composed of a pair of supporting members 1A and 1B arranged in the diameter direction of the steel pipe main column member a5, which bears the load applied to the steel tower. Therefore, the supporting member mounting base 22 forms a cylindrical body which is divided into two at the diameter position and is integrally connected by a large number of bolts and nuts by the flange-like mounting band 30. One mounting wing 32 extending in the axial direction at a position orthogonal to the mounting band 30 is planted on the other, and one similar mounting wing 32 is planted on the other support member mounting base 22B. A U bracket provided on the upper ends of the supporting members 1A and 1B is pivotally supported by 32. In the present embodiment, as in the case of the first embodiment, the support member mounting base 22 is installed so as to overlap the lower part of the gusset 5 of the diagonal member 8. On the other hand, although not shown, the jack cradle also has a structure substantially similar to that of the support material mounting base 22 upside down, and is supported by mounting brackets formed on the jack cradle by U-shaped brackets. Two jacks are installed, and a supporting member 1 composed of a pair of supporting members 1A and 1B arranged in the diameter direction of the steel pipe main column member a5 via the jack is provided between the supporting member mounting base and the jack receiving base. Is done. Thus, even with the simple structure of the minimum pair of support members 1A and 1B, the jacks are operated by a hydraulic pump or the like (not shown) in a stable form arranged in the diameter direction of the steel pipe main column member a5. The pair of support members 1A and 1B can be extended, the main pillar a5 to be replaced can be removed, the steel pipe main pillar a5 can be extracted, replaced with a new steel pipe main pillar, and assembled.

FIG. 11 shows a sixth embodiment of the present invention. This embodiment is different from the above-mentioned two embodiments and is adopted in an angle steel tower. It consists of a pair of support members 1A and 1B arranged on opposite sides of the angle main column member b5 to bear the load applied to the steel tower when the angle main column member b5 is removed. Is a point. Therefore,
The supporting member mounting base 48 is integrally connected by a large number of bolts and nuts with angled mounting bands of 48A and 48B divided into two parts. Two mounting wings 49 extending in a direction perpendicular to the tower center are planted on one of the support material mounting bases 48A, and these two mounting wings 49 are provided on the upper ends of the support materials 1A and 1B. A U bracket is supported. In the present embodiment, similarly to the first embodiment, the support member mounting base 48 is installed so as to overlap the lower part of the gusset 38 of the diagonal member 36. On the other hand, although not shown, the jack cradle also employs a structure substantially similar to that of the support material mounting base 45 whose upside down is reversed, and is supported by mounting wings formed on the jack cradle by U-shaped brackets. Two jacks are installed, and a support member 1 composed of a pair of support members 1A and 1B arranged in a direction perpendicular to the angle main pillar member b5 via a jack is provided between the support member mounting base and the jack receiving base. Is done. Thus, even with a simple structure including a minimum of a pair of support members 1A and 1B, the jacks are operated by a hydraulic pump or the like (not shown) in a stable form that is arranged to face the angle main column member b5 in a direction perpendicular to the angle direction. Then, the pair of support members 1A and 1B are extended, the main column member b5 to be replaced is removed, and after the angle main column member b5 is extracted, the main column member b5 can be replaced with a new angle main column member to be assembled. .

The embodiment of the present invention has been described above. However, within the scope of the present invention, the shape of the support member mounting base and the jack receiving base according to the number of divisions and the like, the support member mounting base and the jack receiving base are not limited. Form of installation on the main pillar by the shape of the mounting band, etc., form of connection between the support material including the jack, etc. and the support of the jack support, number of supports, form of connection of the support to the jack, model of jack The position of the holding frame, the shape of the diagonal gusset, the shape of the connecting plate in the horizontal material, and the like can be appropriately adopted.

[0024]

As has been described in detail above, according to the present invention, the support member mounting base and the support member of the divided band type are provided on the main column members located above and below the main column member to be replaced. Each of the jack receiving stands is installed, a plurality of supporting members are arranged via a jack between the supporting member mounting base and the jack receiving stand, and the respective jacks are operated to extend the plurality of supporting members, After extracting the main column material to be replaced, a new main column material is arranged and assembled, so the support member mounting base and jack cradle made of the divided band method are steel pipe main column material with a circular cross section. Can be simply clamped from both sides in the diametrical direction, and can be easily and reliably installed by angled mounting bands divided into two parts. Each of the jacks is operated by a hydraulic pump or the like. It can safely and surely bear the load on the tower when the steel pipe main column material to be replaced is removed by extending the support material, and the main column material in the energized state without stopping power transmission This allows for the replacement work. For this reason, especially during the replacement work of the main column material of the tower, there is no influence on social life due to a long-term power outage, so that the construction time is not restricted.

Further, if three trifurcated supporting members having a circumferential angle of 120 ° are arranged between the supporting member mounting base and the jack receiving base via the jack, the main object to be replaced is provided. The three-pronged support members arranged equally around the column members equally distribute the load of the axial force applied to the tower when the main column material to be replaced is removed. It is possible to safely replace the main pillar while the power is being supplied under stable holding. In addition, when the main pillar material is configured to bear the load applied to the steel tower when the main pillar material to be replaced is removed by the support material consisting of a pair of support materials arranged in the direction perpendicular to the tower core, Even with a simple structure with a minimum of a pair of support members, it is arranged in a direction perpendicular to the tower center of the main pillar material, and in a stable form, the shaft hanging on the steel tower when the main pillar material to be replaced is removed The load of force is evenly distributed to a pair of support members arranged in the direction perpendicular to the tower center of the main column, and it is possible to safely replace the main column of the steel pipe even when electricity is supplied with relatively stable holding. it can. In addition, even if the support material is long because the main pillar material to be replaced is long, if the intermediate portion of the support material is connected by the holding frame, there is no possibility that the support material will buckle,
The replacement work can be performed safely.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a steel pipe tower showing a main column replacement method according to a first embodiment of the present invention.

FIG. 2 is an enlarged side view of the vicinity of a steel pipe main pillar to be replaced in the main pillar replacement method according to the first embodiment of the present invention.

FIG. 3 is an enlarged perspective view of a portion A and a portion B of FIG. 1 in the main column replacement method according to the first embodiment of the present invention.

FIG. 4 is an enlarged side view of a steel pipe main column material to be replaced in the main column material replacement method according to the first embodiment of the present invention, and is an explanatory view of horizontal member replacement.

FIG. 5 is a schematic perspective view of an angle steel tower showing a method of replacing a main pillar according to a second embodiment of the present invention.

FIG. 6 is an enlarged side view of the vicinity of an angle main pillar to be replaced in a main pillar replacement method according to a second embodiment of the present invention.

FIG. 7 is an enlarged perspective view of a portion C and a portion D of FIG. 5 in the method of replacing a main pillar according to the second embodiment of the present invention.

FIG. 8 is a view illustrating a steel pipe tower according to a third embodiment of the present invention.

FIG. 9 is a view showing an angle tower according to a fourth embodiment of the present invention.

FIG. 10 is a view showing a steel pipe tower according to a fifth embodiment of the present invention.

FIG. 11 is a diagram showing a sixth embodiment of the present invention using an angle steel tower.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Support material a1 ... Steel pipe main pillar material to be replaced b1 ... Angle main pillar material to be replaced 2 ... Support material mounting base 3 ... Jack cradle 4 ...・ Flange joint 5 ・ ・ ・ Diagonal gusset 6 ・ ・ ・ Jack 7 ・ ・ ・ Basic column 8 ・ ・ ・ Diagonal 9 ・ ・ ・ Horizontal

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Mamoru Chiba 26, Yanagicho, Saiwai-ku, Kawasaki City, Kanagawa Prefecture Tokyo Electric Power Company Kawasaki Works (72) Inventor Kiyotaka Kubota 26, Yanagicho, Saiwai-ku, Kawasaki City, Kanagawa Prefecture Tokyo Electric Power Company Inside the Kawasaki Corporation (72) Inventor Kensho Kuroiwa 2--11 Kitayuki, Nishi-ku, Yokohama-shi, Kanagawa Prefecture Inside the Yokohama Corporation of Tokyo Electric Power Company (72) Inventor Yasuyuki Kajiyama 2- 1-4 Uchisaiwaicho, Chiyoda-ku, Tokyo (72) Inventor Shinsaburo Takao 6-2-10 Ginza, Chuo-ku, Tokyo Inside Tomoe Corporation (72) Inventor Tetsuro Higuchi 1-1-1 Shinjuku, Shinjuku-ku, Tokyo Nasu Electric Works Co., Ltd. (56) References JP-A-6-189421 (JP, A) JP-A-63-44086 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04H 12/10

Claims (2)

(57) [Claims] 1. A support member mounting base and a jack receiving base each of which is a divided band type are installed on main pillar members located above and below a main pillar member to be replaced, respectively.
At least three support members are pivotally supported by a U fitting between the support member mounting stand and the jack receiving stand via a jack, and a holding frame connecting the support members is used.
Main pillar members of a steel tower, wherein the main pillar members are held and operated by operating the jacks to extend a plurality of support members, and after extracting the main pillar members to be replaced, a new main pillar member is arranged and assembled. Replacement method. 2. The method according to claim 1, wherein the supporting member mounting base and the jack receiving base are installed so as to overlap a joint or a diagonal gusset of a main column member located above and below a main column member to be replaced. The method for replacing a main pillar of a steel tower according to claim 1.