JPS5840629B2 - Assembly method for power transmission towers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a construction method for assembling a steel tower (hereinafter referred to as a special steel tower) having a gate structure, such as a gate-shaped steel tower for power transmission or an eboshi-shaped steel tower.

Conventionally, as a construction method for assembling these special steel towers, for example, the construction method shown in FIG. 1 and FIG. 2 has been adopted for elongated steel towers.

The construction method shown in Figure 1 begins with the construction of the lower tower body 1 of an Eboshi-type steel tower.
are assembled, and the two underframes 3 are sequentially attached to this at appropriate positions, and the gate structure 2 of the steel tower is
This is the so-called two-rod construction method, in which the 0 members are lifted one by one and assembled from the bottom.

Arrow 5 indicates the direction of the branch line of the underframe 3. The construction method shown in Figure 2 first assembles the lower tower body part 1 of the steel tower in the same way as in Figure 1,
A vertical steel column 9 and two underframes 10 that branch out from the column and intersect diagonally are installed at the center of the steel tower, and the members of the gate structure 2 of the steel tower are sequentially lifted by a pulley 4 attached to the tip of the underframe 10. This is a method that combines iron pillars and metal rods.

11 is a branch line of the underframe 10 and is pulled in the direction of the arrow through the tip of the steel column 9.

However, when such a special steel tower becomes larger, the length and weight of the members extending from the beam part 6 to the armrest part 7 shown in FIG. Due to this problem, it is almost impossible to lift and assemble the parts while maintaining balance.

The present invention has been made in view of the above-mentioned problems, and by installing a temporary pedestal in the shape of an extension of the lower body of the special steel tower and a lifting jack, even if the special steel tower becomes large, it can be easily It is an object of the present invention to provide a method for assembling a power transmission tower having a gate structure that allows the gate structure to be assembled stably and safely.

The present invention provides a method for assembling a power transmission tower having a gate structure, which includes: (a) assembling a lower tower body portion of the tower below the gate structure portion; (b) above the lower tower body portion; A temporary pedestal having a structure similar to that of the lower tower body part and a jack that can be raised and lowered are installed on the upper surface of the temporary pedestal, (c) A beam part constituting the gate structure part and a arm part having a hinge part at the lower end are installed on the jack. d) Separately, on the lower tower body part, assemble a lower support member that supports the gate structure part having a hinge part at the upper end, and on the lower tower body part. (e) After correcting the misalignment of the two hinge parts to be joined by operating the jacks, joining the hinge parts, and assembling the steel tower, (f) fixing the temporary pedestal and the jacks. This is a construction method for assembling power transmission towers that is characterized by the removal of .

In the present invention, power transmission steel towers (special steel towers) having gate structures include, for example, gate-shaped steel towers (gate-shaped steel towers in which the column bodies are connected with "beams"), ebboshi-shaped steel towers (a type of square or rectangular steel towers), etc. refers to a steel tower with a gate structure, such as a steel tower with a narrow midsection and a widened top.

FIG. 3 is a front view showing an example of a special steel tower assembled according to an embodiment of the present invention, in which 1 is the lower tower body part, and the gate structure part 22 is connected to the beam part 6, arm part 7, lower support member 12, etc. The upper member and the lower member are joined by a hinge portion 8.

13 is a power line attachment position.

Hereinafter, the construction method of the present invention will be explained with reference to the drawings and examples.

FIGS. 4A to 4E are block diagrams shown in the order of steps to explain an embodiment of the construction method of the present invention.

In the figure, the same reference numerals as in FIG. 3 indicate the same parts.

In this case, the steel tower to be assembled is the same special steel tower as shown in FIG.

First, as shown in Figure A, the steel tower 2 is constructed using the same method of combining steel columns 9 and underframes 10 as in the conventional method shown in Figure 2.
The lower tower body part 1 below the gate structure part 22 of No. 0 is assembled.

Next, a temporary pedestal 14 with a framework structure similar to that of the lower tower body 1 (for example, four pillars, tapered) is assembled above the lower tower body 1 in the form of an extension of the tower body 1, and each of the four corners of the upper surface can be raised and lowered. Install a possible jack 15.

This jack 15 has a link mechanism 17 that connects an upper disc 16 and a lower disc 17, as shown in an example in FIG. It is designed to be able to be raised and lowered.

The lower disk 17 of the jack 15 is connected to the upper surface of the temporary frame 14, and the upper disk 16 is connected to the lower surface of the central member 16 of the beam section 6 of the steel tower.

At first, set the jack 15 in the raised position.

During or after the assembly of these rectangular frame bodies, the branch lines of the steel columns 9 are tied to these frame bodies as necessary.

The central member 16 of the beam section 6 is assembled on the jack 15, and then, as shown in the drawing, the beam section 60 member is lifted up by the pulley 4, connected to the central member 16, and sequentially extended and assembled.

In this case, the size of the member to be lifted in one turn may be either part or all of the bee 4 section 6. In short, if the weight of this member is temporarily biased to one side of the steel tower, the weight of this member and It is sufficient that the temporary pedestal 14 including the jacks 15 can withstand the eccentric load.

Of course, the figure shows only the right side of the tower being assembled, but the left side of the tower can be assembled while maintaining balance between the left and right sides by lifting and assembling the same parts as on the right side alternately.

In the present invention, since the temporary pedestal 14 including the jacks 15 that support the assembled gate structure has a similar structure to the lower tower body 1, it is easy to lift and assemble the gate structure 220 members even if they are large. This allows for stable and safe work.

Next, as shown in the figure, part or all of the lower support member 120 of the gate structure section is separately lifted and assembled onto the lower tower body section 1.

A hinge portion 8 is attached to the upper end of the lower support member 12.

In this case, since the assembly members of the lower support member 12 are supported by the sturdy lower tower body part 1, the assembly work can be performed easily, stably and safely.

The lifting and assembly of the lower support member 12 may be carried out either during or before or after the assembly of the beam part 6 and the arm part 7 above the hinge part 8 of the gate structure. It is necessary to carry out the lifting at a time when the lifted beam part or cross arm part 7 does not interfere with the lifting.

Next, as shown in FIG. 2, the arm part 7 having the hinge part 8 at the lower end is lifted up and connected to the beam part 6.

As a result, the upper member of the gate structure above the hinge part 8 is supported separately on the jack 15, and the lower member of the gate structure below the hinge part 8 is supported separately on the lower tower body part 1. However, the hinge portions 8 attached to the upper and lower members to be joined are usually misaligned due to deflection, misalignment, etc. of the members, and thus do not engage.

For this purpose, the position of the hinge part 8 of the upper member of the gate structure is adjusted vertically and horizontally by operating the jacks 15 at the four corners of the temporary frame 14, and the position of the hinge part 8 of the upper member of the gate structure is adjusted by engaging with the hinge part 8 of the lower member and joining. do.

In this case, since the four-piece jack 15 can be easily raised and lowered by hand using a monkey wrench, the hinge part 8 can be secured very easily. As shown, other necessary members such as the overhead ground wire bracket 21, the power line arms 23 and 24, and the like are lifted and assembled.

These members are usually assembled after the hinge portions are joined, but they may be assembled before the hinge portions are joined.

After completing the assembly of the gate structure 22 in this way, the jack 1
5 and the temporary pedestal 14), and finally the steel pole 9.
Then, the metal rod 10 is removed to complete the assembly of the steel tower 20 (Figure 3).

FIGS. 6 and 7 are block diagrams illustrating other embodiments of the construction method of the present invention, in which FIG. 6 shows a case of an elongated steel tower, and FIG. 7 shows a case of a narrow-line elongated steel tower.

In the figure, the same reference numerals as in FIG. 4 indicate the same parts.

It is clear that in these cases as well, the steel tower can be assembled using the same procedure as shown in FIG.

As described above, the construction method of the present invention is a construction method for assembling a power transmission tower having a gate structure, in which a temporary pedestal with a structure similar to that of the lower tower body is installed above the lower tower body of the tower, and A jack that can be raised and lowered is installed, and on the jack, a beam part constituting the gate structure part and a arm part having a hinge part at the lower end are sequentially extended and assembled, and in order to be supported by the jack, the members are assembled. Even if the eccentric weight and eccentric load during assembly become large, the temporary frame including the jacks is strong and can withstand the eccentricity, so the assembly work can be easily, stably and safely carried out, and especially Even in the case of large steel towers, where the parts extending from the beam part of the gate structure to the armrest part become longer and heavier, the construction work can be carried out easily and efficiently, since the lifting and assembly weight can increase several times. There are benefits to be gained.

Furthermore, in the construction method of the present invention, it is possible to correct the misalignment of the two hinge parts to be joined, which are attached to the upper and lower members of the gate structure, which are supported separately, by manually operating the jack, The upper member and the lower member of the gate structure can be joined extremely easily, and the difficulty of joining the hinge part during lifting of the upper member, which was conventional, is completely eliminated.

Therefore, the construction method of the present invention makes it possible to assemble a power transmission tower having a gate structure that increases the profit and size, and provides an optimal construction method.

[Brief explanation of drawings]

FIGS. 1 and 2 are diagrams each illustrating an example of a conventional assembly method for an elongated steel tower. FIG. 3 is a front view showing an example of a special steel tower assembled by an embodiment of the construction method of the present invention. FIGS. 4A to 4E are block diagrams shown in the order of steps to explain an embodiment of the construction method of the present invention. FIG. 5 is a side view showing an example of the jack used in the embodiment of the present invention. FIG. 6 and FIG. 7 are block diagrams explaining other embodiments of the construction method of the present invention, respectively. 1... Lower tower body part, 2... Gate structure part, 3, 10...
Metal rod, 4... Pulley, 5... Direction of branch line, 6... Beam part, 7... Bracelet part, 8... Hinge part, 9...
Steel column, 11... branch line, 12... lower support material, 13.
... Power line installation position, 14... Temporary mount, 15...
Jacket, 16... Upper disk, 17... Lower disk, 18
... Bolt, 19... Natsuto, 20... Steel tower, 2
2...Gate structure section.

Claims (1)

[Claims] 1. A construction method for assembling a power transmission tower having a gate structure (℃)
(a) Assemble the lower tower body below the gate structure of the steel tower, (b) Install a temporary pedestal with a similar configuration to the lower tower body above the lower tower body, and install a temporary pedestal with a structure similar to that of the lower tower body, and a platform that can be raised and lowered on its upper surface. (c) on the jack, a beam part constituting the gate structure part and a arm part having a hinge part at the lower end are successively extended and assembled, and supported by the jack; ( d) Separately, assemble a lower support member for supporting the gate structure having a hinge portion at its upper end on the lower tower body, and support it in the lower tower body; After correcting the misalignment of the hinge portion by operating the jacks, joining the hinge portions, and assembling the steel tower, (f) removing the temporary pedestal and the jacks. Assembly method.