JPH05286694A - Construction method and crane for assembling external type steel tower - Google Patents

Abstract

PURPOSE:To erect a steel tower easily even in a narrow place, rationalize the operations, and enhance the safety and product quality by installing an erection crane outside of steel tower, and erecting steel tower through utilization of this crane. CONSTITUTION:To erect a steel tower, a basic type crane 1 having a jib 11 capable of rising and falling and also revolving is installed beside the site where construction of steel tower is planned, and therewith four main pullar members 3 for outer ridges constituting the skeleton of steel tower 2, horizontal members 4 to couple the main pillar members 3 horizontally, diagonals 5 coupling the main pillar members 3 diagonally, etc., are carried from the ground to respective hung-up places as specified and assembled. When assembly proceeds to the extent in which the basic type crane 1 can execute assembly processes, masts 18, 26, etc., are put upright by the crane itself 1 and bulk heaved to increase the tower height, and a horizontally supporting member 31 is set for the bulk heaved steel tower. This horizontally supporting member 31 is formed adjustable for expansion and contraction, and also a corridor 41 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an external steel tower assembling method for installing an assembling crane outside a steel tower and assembling the steel tower, and an external steel tower assembling crane used directly therefor.

[0002]

2. Description of the Related Art There are three types of conventional steel tower assembly methods: pedestal assembly, steel tower installation crane assembly, and mobile crane assembly. The pedestal assembly method is a method in which a pedestal is attached using the main pillar material of a steel tower, a branch line is attached to the ground from the tip of the pedestal, and the constituent members of the steel tower are lifted and assembled.

That is, in the pedestal assembly method, as shown in FIG. 10, first, the base end of the pedestal 101 is attached to the foundation 102 of the steel tower,
One end of a branch line 103 is fixed to the tip of the pedestal 101, and the other end of the branch line 103 is attached to a pedestal 104. The branch line 103 is a wire for raising the pedestal 101, which is a branch line after the pedestal 101 is raised. On both sides of the branch line 103, steady rests 105 are provided, one end of each is secured to the tip of the pedestal 101, and the other end of the steady rests 105 is attached to the mount 106. In this state, the wire 108 provided on the gold wheel 107 of the pedestal 101 is driven by the engine 110 to lift the component member 109 of the steel tower.

When the steel tower is assembled and raised, as shown in FIG. 11, the pedestal 101 is fixed to the upper end of the steel tower 100 and the wire 103 is attached.
The structural member 109 of the steel tower is lifted by. In the pedestal assembling method, as the height of the steel tower 100 increases, the ground mounting position 120 of the branch line 103 becomes farther from the steel tower 100, and the steel tower 100 cannot be assembled without the land for mounting the branch line 103.

In the pedestal assembly, the engine 110 is used for hoisting the component 109 of the steel tower, but the turning and undulation for mounting the engine 110 at a desired location depends on human power, and the skill level is low. It is required and sufficient consideration for safety is required. The lift crane installation method installed inside a steel tower is a method of installing an assembly crane inside a steel tower, lifting an assembly crane according to the assembly of the steel tower, and assembling the assembly crane while supporting it on the main pillar material of the steel tower with wires. ..

That is, as shown in the figure, the iron pillars 202 between the gantry 201 arranged on both sides are sequentially lifted by a mechanical or hydraulic system with a wire 205, a gold wheel, a winch, etc. interposed therebetween, and a crane 203 is required. As for the height, the steel tower 204 is assembled. FIG. 12 shows a state in the initial stage of assembling the steel tower 204, and FIG. 13 shows a state in the final stage of assembling the steel tower 204.

In assembling a crane to be installed inside a steel tower, the crane cannot pass and the steel tower cannot be assembled unless the horizontal distance 206 between the main pillars at the top of the steel tower is 2 m or more. The horizontal distance between the main pillars at the top of the transmission tower with the current voltage of 500KV is more than 2m. As shown in FIG. 14, the mobile crane vehicle assembly method assembles the steel tower 302 using the truck crane 301. However, even if the model to be applied for assembling the steel tower 302 is determined, the truck crane 301 is installed up to the assembly place. If it cannot be transported, the steel tower 302 cannot be assembled.

The mobile crane assembly cannot be assembled unless a place for installing the truck crane 301 can be secured. Further, in the above-described conventional steel tower assembling method, the skeleton of the steel tower can be assembled, but the members inside the steel tower can be assembled only after removing the pedestal or the crane.

[0009]

In the conventional method of assembling the pedestal, a large work site is required only for assembling the steel tower in order to secure a land to which a branch line supporting the pedestal is to be secured. Experts are required, and sufficient consideration must be given to ensuring safety. In addition, the method of assembling a crane to elevate a tower cannot be adopted unless the horizontal spacing between the main pillars near the top of the tower is increased.

Further, the mobile crane assembly method requires securing a transportation path and an installation place of a truck crane associated with assembly.

[0011]

In view of the above-mentioned circumstances, the present invention installs an assembly crane outside the steel tower and raises or raises it according to the assembly height of the steel tower to horizontally support the steel tower. The assembly is carried out while being supported by the material, and the work is streamlined, the safety and quality are improved, and the process is shortened.

Further, according to the present invention, since the steel tower supporting the horizontal support member is inclined, the length changes depending on the height of the steel tower. Further, the present invention attaches the equipment of the corridor to the horizontal support so that the work between the crane and the steel tower can be carried out smoothly. Furthermore, in the present invention, the horizontal support member is set according to the type of the main pillar material of the steel tower.

[0013]

In the present invention, since the steel tower assembling crane is located outside, not only the skeleton of the steel tower but also the internal structural materials can be assembled together. If a crane is installed outside the steel tower, even if the existing steel tower is dismantled, it can be dismantled together from the top without removing the internal structural materials.

In the present invention, even if there is a change in the structure of the steel tower due to a design change, etc., since there is an assembly crane outside,
It can be handled only by changing the horizontal support material.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on a specific embodiment shown in the accompanying drawings. First, as shown in FIG. 1, the basic-type assembly crane 1 is arranged on the side of the steel tower installation scheduled site. In this basic type assembly crane 1, the jib 11 is undulating,
Turn around and lift up the components of the tower to bring them to the required location.

Next, as shown in FIG. 2, the basic type assembly crane 1 is used to assemble the steel tower 2 within a range where it can be assembled. That is, four main pillars 3 that form the outer ridgeline that forms the skeleton of the steel tower 2, a horizontal member 4 that horizontally connects the main pillars 3, and a diagonal member 5 that obliquely connects the main pillars 3 to each other. Starting from, the opposite side auxiliary member 6, which diagonally connects the horizontal members 4 on the same horizontal plane arranged inside the steel tower 2, the opposite side auxiliary member 6 and the horizontal member 4
The diagonal auxiliary member 7 for connecting the joining angle of (1) is lifted from the ground and carried to a required location to assemble the steel tower 2.

When the basic type assembling crane 1 has been assembled to the extent that it can be assembled, the crane 1 itself raises or raises the height. An example of raising the crane 1 will be described. FIG. 3 is a diagram showing a state in which the padding has been completed. That is, the anchor bolt 17 raised from the concrete foundation 16 placed in the ground causes
Secure the mast 18. An upper lift frame 19 and a lower lift frame 20 are slidably fitted onto the first mast 18, respectively, and the base end of the electric cylinder 21 is attached to the upper lift frame.
Kannuki 22 ・ 23 pivotally attached to 19 and connecting the tip of the piston rod of the electric cylinder 21 to the lower lifting frame 20 and fixing the upper lifting frame 19 and the lower lifting frame 20 to the mast.
Are provided respectively. A table 24 is rotatably provided on the upper elevating frame 19, and a jib 11 is movably provided on the table 24. A wire 25 is suspended at the tip of the jib 11.

The raising of the crane 1 is shown in FIGS.
This will be explained in (d). First, as shown in FIG. 4 (a), the upper lifting frame 19 slidably fitted on the first mast 18
And Cannuki 22 and 23 of the lower lifting frame 20 are ON
Both the upper lifting frame 19 and the lower lifting frame 20 are fixed to the first mast 18. Next, as shown in FIG. 4 (b), the latch 23 of the lower elevating frame 20 is turned ON, and the first
While being fixed to the mast 18, the cannuki 22 of the upper lifting frame 19 is turned off to loosen the fixing to the first mast 18, and the electric cylinder 21 is extended.

Subsequently, as shown in FIG. 4 (c), the latch 22 of the upper lifting frame 19 is turned on and fixed to the first mast 18, and the latch 23 of the lower lifting frame 20 is turned off to turn the first mast. Loosen the fixing to 18. Finally, Figure 4
As shown in (d), the electric cylinder 21 is contracted to raise the lower elevating frame 20.

As described above, the upper elevating frame 19 and the lower elevating frame 20 are raised on the first mast 18.
The table 24 provided with the jib 11 rises as the upper lifting frame 19 rises. As shown in FIG. 3, the second mast 26
Is lifted and placed on the first mast 18 to raise the mast.

The upper lifting frame 19 and the lower lifting frame 20 are similarly lifted on the second mast 26. Thereafter, the mast is raised in the same manner. Raise the mast and perform work within the range where the tower can be assembled. Since the mast gradually rises, as shown in FIG. 5, a horizontal support member 31 is erected and supported between the mast and the steel tower 2 in which the crane 1 is assembled.

The horizontal support member 31 is a type of the main pillar member 3 of the steel tower 2.
As shown in FIG. 6, a support fitting 32 fitted to the mast and a support fitting 33 fitted to the main pillar material 3 of the steel tower 2 are attached according to the size (steel pipe, angle member, etc.) and size.
A turnbuckle between the support rods 34 that are pin-connected to and respectively.
It is flexible with 35 intervening. Main pillar material 3 of steel tower 2
Are arranged with an inclination, and the width of the steel tower 2 becomes narrower as the width increases, and the required length of the horizontal support member 31 changes each time, so that it can be dealt with.

The expansion and contraction mechanism of the horizontal support member 31 is not limited to the above example, and as shown in FIG. 7, the support member 37 can be slid in the tubular body 36 and fixed by bolts 38 at appropriate places. Good. After the horizontal support member 31 is attached, as shown in FIG. 2, the range in which the crane 1 can be swung is assembled including the opposite side auxiliary member 6 and the diagonal auxiliary member 7 inside the steel tower 2. In addition, as shown in FIGS. 5 and 6, the equipment of the corridor 41 is attached to the horizontal support member 31, and the crane 1 is raised or lifted and the tower 2 is assembled. Smooth the work you were doing.

In order to facilitate lifting and lowering, a crane 1 is provided with a gondola 51 for lifting and lowering the worker, as shown in FIGS. The gondola 51 is provided on the side of the crane 1 arranged outside the steel tower 2 to be assembled, on the side far from the steel tower 2.
Wire rope 53 hung from the protruding upper mount 52
Hang by. Similarly, the gondola 51 is hung from the upper mount 52 on the safety device wire rope 54, and the gondola safety device 55 that locks or swings the gondola 51 is installed on the side of the crane 1.
There is a landing 56 for workers just below. Reference numeral 57 is a crane lifting device.

After the steel tower 2 has been assembled, the crane 1 is disassembled. The disassembling method is to remove the horizontal support member 31 at the upper part at the time of assembling, lower it, and repeat this for dismantling.

[0026]

As described above, according to the present invention, the crane can be assembled even if there is a change in the inclination of the tower tower body or a change in the horizontal spacing of the tower tower body (the width becomes narrower toward the top). Further, according to the present invention, the labor of the worker can be reduced, and if the crane operation and the assembling procedure are learned, the assembling work, which requires many skilled workers, can be assembled without being affected by the skill of the worker. ..

Further, according to the present invention, the quality and safety of the steel tower assembly can be improved, and the steel tower assembly process can be shortened.

[Brief description of drawings]

FIG. 1 is a side view of a basic type assembly crane arranged near the outside of a steel tower according to a specific embodiment of the present invention.

FIG. 2 is a side view showing a state where the basic tower assembly crane has assembled a steel tower within a range where it can be assembled.

FIG. 3 is a side view for explaining how to raise the mast with the basic type assembly crane.

FIG. 4 is a diagram illustrating raising of a mast.

FIG. 5 is a side view showing a state in which a steel tower is assembled by a crane installed outside the steel tower of the present invention.

FIG. 6 is a side view and a plan view showing a state in which the crane is installed between a horizontal support crane and a steel tower.

FIG. 7 is a vertical cross-sectional view showing an expansion / contraction mechanism of another example of the horizontal support member.

FIG. 8 is a side view of a crane including a worker lifting gondola.

FIG. 9 is a plan view of a gondola.

FIG. 10 is a diagram showing a conventional pedestal assembly method.

FIG. 11 is a diagram illustrating a conventional pedestal assembling method.

[Fig. 12] Fig. 12 is a side view illustrating an initial stage of a conventional method for assembling a lifting crane installed in a steel tower.

FIG. 13 is a side view and a plan view of a conventional ascending crane installation method installed in a steel tower.

FIG. 14 is a side view and a plan view of a conventional mobile crane assembly method.

[Explanation of symbols]

 1 ... Crane 2 ... Tower 31 ... Horizontal support 41 ... Walkway

Claims (5)

[Claims] 1. An external steel tower assembling method in which an assembly crane is installed outside the steel tower to assemble the steel tower. 2. An external steel tower assembling method in which an external steel tower assembling crane is raised or raised according to the assembly height of the steel tower, and a horizontal support is installed between the raised and raised steel tower. 3. An external type steel tower assembly crane in which a horizontal support material is raised or raised according to the assembly height of the steel tower, and a horizontal support material is installed between the steel tower and the raised or raised steel tower. External type tower assembly crane with adjustment function. 4. An external type steel tower assembly crane in which a horizontal support material is raised or raised according to the height of the steel tower assembly and a horizontal support material is installed between the steel tower and the raised or raised steel tower. External type tower assembly crane equipped with. 5. An external type tower assembling crane, wherein a horizontal support material is raised or raised according to an assembly height of the steel tower, and a horizontal support material is installed between the raised and raised steel tower. External type tower assembly crane set according to the type of main pillar material.