JPH1068235A - Engineering method and device for disassembling tower construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with a conventional scaffold in successively dismantling a tower construction from its lower end side, enable disassembling period to be shortened and improve operation safety by lessening aerial operation. SOLUTION: The upper position of a tower construction is supported and the lower position is sustained so that it may always be in an upright condition. The lower end 22 of the tower construction positioned on the lower side than the sustained lower position 12 is then removed. The tower construction is ground by descending it by the removed portion of the sustained lower position 12. Sustainment of the lower position 12 is then released and the construction is sustained again upon changing sustaining position to upper part by a specific distance, after which the lower end is removed. By repeating such process, disassembling of the tower construction can be successively performed without difficulty. Thus shortening of the disassembling period by shortening the arrangment time before and after the disassembling operation and exclusion of aerial work during the whole course of operation can be accomplished.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for dismantling a tower-like structure, and more particularly to a method and an apparatus for disassembling a tower-like structure sequentially from a lower end.

[0002]

2. Description of the Related Art Conventionally, as a method of dismantling a so-called high tower-like structure such as a chimney or a radio tower, a method of disassembling a scaffold around the tower-like structure from the top of the tower-like structure or a tower-like structure has been known. The method of dismantling after defeating was common. However, in the case of the former, work was performed at a high place because of disassembly from above, and the work was lacking in safety. In addition, as a preparatory step for the demolition work, it is troublesome to assemble a scaffold surrounding the tower-like structure and to remove the scaffold according to the progress of the demolition work, etc., before and after the demolition work.

[0003] In the latter case, it is difficult to secure a place where the tower structure can be laid down around the tower structure due to recent land conditions since the tall tower structure is laid over a wide area when it is knocked down. It is also difficult to secure a demolition work place when dismantling a steel tower standing on a slope such as the one above. In addition, when the lower end of a chimney or the like is destroyed and a tower-like structure is knocked down, it is difficult to reliably determine the direction in which the tower-like structure is knocked down. There was a fear that an accident would occur.

[0004] In order to eliminate the above-mentioned inconveniences, various construction methods for sequentially dismantling the tower-like structure from the lower end side have been proposed. Such a construction method can eliminate the danger of working at high places by sequentially dismantling from the lower end side of the tower-like structure, and can also perform dismantling work in only one place, so that it is easy to secure a work place. It becomes.

[0005] As one of the methods of dismantling sequentially from the lower end, there is, for example, a hanging dismantling method in which a tower-like structure is suspended and dismantled sequentially from the lower end. In this suspension-type demolition method, first, a scaffold capable of suspending the entire tower-like structure from above is provided. Next, the tower-like structure is suspended from the scaffold and dismantled from the lower end side, and dismantling is performed while lowering the tower-like structure according to the progress of dismantling.

[0006]

However, when the above-mentioned hanging type demolition method is used, a scaffold has to be set up around the tower-like structure as a stage prior to the demolition work. In addition, the scaffold must be provided with a rigid and strong scaffold to be able to suspend the tower-like structure, and the installation work becomes large-scale, and time is required for setup before dismantling. Had to spend.

[0007] After the dismantling of the tower-like structure is completed, a scaffold higher than that of the tower-like structure must be disassembled. Was. The setup process before and after such dismantling work has promoted the extension of the construction period, and has caused an increase in dismantling costs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to eliminate the need for large-scale scaffolding and other equipment as in the prior art when sequentially dismantling a tower-like structure from the lower end side. A tower-like structure that can shorten the construction period by reducing the number of setup steps before and after the demolition work of the shape-like structure, and can increase the safety of work by minimizing the high-level work in the demolition work and the setup process An object of the present invention is to provide a method and an apparatus for dismantling a building.

[0009]

In order to achieve the above object, a method for dismantling a tower-like structure according to the present invention supports the tower-like structure so that the tower-like structure is always upright. And
After holding the lower position of the tower-like structure with a holding force capable of supporting the entire weight of the tower-like structure, the lower end of the tower-like structure located below the holding position is removed. Next, the entire tower structure is lowered by lowering the held lower position. Then, the holding position at the lower position where the tower-like building is held is changed, and the holding position at which the tower-shaped structure is held above the predetermined length again is changed.

Therefore, it is possible to sequentially disassemble the tower-like structure from the lower end while supporting the tower-like structure in an upright state during the dismantling operation. Thereby, the dismantling work of the tower-like structure can be easily performed, and the work period can be shortened by shortening the setup process before and after the dismantling work. In addition, it is possible to further reduce the work at a high place associated with the dismantling work and the setup process thereof, and it is possible to further enhance the safety of the work.

[0011]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an overall explanatory view schematically showing a method of dismantling a tower-like structure according to the present invention, and FIG.
FIG. 2 is an explanatory top view of FIG. 1.

As shown in the drawing, a tower 1 which is a tower-like structure
0 stands perpendicular to the ground surface 11. And
In order to dismantle the tower 10, the ground 1
A base holding device 14 is provided for holding a lower position 12 which is a portion above the first portion 1 by a predetermined length 1 with a holding force capable of supporting the entire weight of the steel tower 10. Further, in order to always support the tower 10 in an upright state, there are provided four branch lines 18 and an attitude control device 20 for adjusting the tension of each of the four branch lines 18 to control the tower 10 in an upright state. .

The base holding device 14 has a plurality of arms 15 (see FIG. 2) that can hold the lower position 12, and each of the arms 15 is fixed to a frame 16 that can move vertically in synchronization. Has been established. The frame 16 has a lift structure (not shown) that moves up and down under the control of, for example, hydraulic pressure, and the tower 10 held by the arm 15 is
Can be moved downward by lowering.

[0014] One end of each of four branch lines 18a, 18b, 18c, and 18d formed of, for example, wires is connected to an upper position 17 located above the steel tower 10. These branch lines 18 are newly provided for dismantling the steel tower 10.

The other ends of the branch lines 18 are provided with attitude control devices 20a, 20b, 2
0c and 20d (see FIG. 2). In the present embodiment, the attitude control device 20 is arranged so as to form a substantially rectangular shape. However, if the upper position 17 is pulled with the same tension and the tower 10 can be maintained in an upright state, the branch line 18 is used. , The number, the angle, and the length may be freely changed. Therefore, for example, it can also be used when the steel tower 10 is erected on an inclined surface such as in the mountains.

The attitude control device 20 is fixed to the ground surface 11 by driving, for example, a plurality of anchors (not shown). And these attitude control devices 20a, 20
b, 20c, and 20d are electrically connected to each other, and each branch line 18a,
The tension and length of 18b, 18c and 18d are adjusted with each other to balance the uprightness of the tower 10 and to control the tower 10 to be always upright.

Next, a disassembly method using the disassembly apparatus having the above configuration will be described with reference to FIGS. FIG.
Is a flowchart showing each step in the above dismantling method, and FIG. 4 is a partial explanatory view schematically showing a dismantling method of the tower-like structure.

First, in step (hereinafter simply referred to as "S") 101, the upper position 17 is supported. here,
Four branch lines 18a, 18b, 18c, 1
8d is connected to one end, and the other end is connected to each attitude control device 20a, 2d.
0b, 20c and 20d. Each attitude control device 20
The a, 20b, 20c, and 20d adjust the tension and length of the branch lines 18a, 18b, 18c, and 18d, respectively, to control the tower 10 so that it is always upright.

Then, in S102, the lower position 12 of the steel tower 10 is held. Here, the base holding device 14 moves and arranges the frame 16 upward, and the arm 15 holds the steel tower 10 by gripping the lower position 12.
Then, in S103, the lower end 22 of the steel tower 10 located below the lower position 12 gripped by the arm 15 is removed (see FIG. 4A). That is, the lower position 12 is held by the base holding device 14 and the upper position 17 is
8 to be supported by the attitude control device 20 via
The lower end 22 can be removed while the tower 10 is kept upright.

Next, in step S104, the steel tower 10 descends and lands. Here, the lowering of the frame 16 of the base holding device 14 and the adjustment of the length of the branch line 18 by the attitude control device 20 are performed simultaneously. That is, the base holding device 14 descends the frame 16 by hydraulic control, and the attitude control device 20 adjusts the length of the branch line 18 following the downward movement.

Therefore, the steel tower 10 can descend while maintaining the upright state. Then, the new lower end portion 22 ′ of the steel tower 10 lands on the ground surface 11 (see FIG. 4B), and is temporarily fixed to the ground surface 11, and then proceeds to S105.

In S105, the holding position of the lower position 12 by the base holding device 14 is changed. Here, the landing portion 19 of the tower 10 that is landing on the ground surface 11 is temporarily fixed to the ground surface 11 and is not easily moved.
Maintains a stable upright position. Therefore, the holding of the tower 10 and the arm 15 is released, the frame 16 is raised again, and the new lower position 12 'of the tower 10 is held (see FIG. 4C).

Then, in S106, it is determined whether or not the dismantling of the steel tower 10 has been completed. Here, the upper position 17
It is determined whether or not the dismantling has been completed. If the upper position 17 of the steel tower 10 still remains (NO), the process proceeds to S103, and if not (YES), the dismantling ends (END).

Then, the dismantling of the steel tower 10 is completed (S1).
The steps from S103 to S105 are repeated until YES at 06). Therefore, by performing the above-described steps, it becomes possible to more easily disassemble the steel tower 10 sequentially from the lower end side. Further, a post-setup step such as removal of a scaffold after dismantling can be omitted, and the construction period can be further shortened.

In the present embodiment, the holding position is changed after the steel tower 10 is landed and the lower end portion 22 'is temporarily fixed to the ground surface 11, but the landing position is not always required. That is, the holding position may be changed by a mechanism capable of grasping the upper part of the tower 10 without landing after the tower 10 is lowered.

Further, the present invention is not limited to this embodiment. For example, the tower-like structure is described as the steel tower 10, but the present invention can be similarly applied to a reinforced concrete chimney or the like. You can do it. FIG.
FIG. 3 is a schematic explanatory view schematically showing a base holding device 27 that holds a lower position 26 of the chimney 24. As shown in the figure, the base holding device 27 has a frame 28 that can be moved up and down by, for example, hydraulic control, and the frame 28 has arms 30 that can move in the diameter direction of the chimney.

The arm 30 holds the lower position 26 of the chimney 24 from both sides to hold the weight of the chimney 24 with a supportable holding force. After the lower end 28 is removed, the arm 30 is removed.
The chimney 2 is lowered by lowering the frame 28 provided with
4 land on the ground surface 11. Then, after the lower end 32 of the chimney 24 is temporarily fixed to the ground surface, the holding by the arm 30 is released,
The frame 28 is raised to hold a new lower position 26 above the ground surface 11 by a predetermined height. By repeating the above steps, the chimney 24 can be sequentially dismantled from the lower end side.

Further, in the present embodiment, the tower 10 is supported upright by using four branch lines 18 as shown in FIG. 2; As described above, the support may be performed using three branch lines 18. FIG. 6 is an explanatory top view schematically showing a disassembly method of a tower-like structure in another embodiment, and the same components as those in FIG. Omitted.

In this embodiment, a branch line 18 is newly provided for dismantling work. However, a plurality of branch lines are previously provided for maintaining a tower-like structure such as the steel tower 10 and the chimney 24 in an upright state. 18, a new branch line 18
, And the branch line 18 can be used as it is. Therefore, the setup process in the stage before dismantling can be further reduced, and the cost can be reduced by shortening the construction period. In addition, the use of the branch line 18 can completely eliminate high-altitude work in dismantling work, so that work safety can be further improved.

[0030]

As described above, according to the tower construction dismantling method and the apparatus according to the present invention, when the tower construction is dismantled from below, a large amount of equipment is not required and only a small equipment is required. Can dismantle the tower-like structure more easily. In addition, the setup before and after the dismantling operation can be shortened, and the tower-like structure can be dismantled in a shorter construction period, and the cost can be reduced. In addition, since high-place work in the setup step and the dismantling step can be reduced or completely eliminated, the safety of the dismantling work can be improved.

[Brief description of the drawings]

FIG. 1 is an overall explanatory view schematically showing a method of dismantling a tower-like structure according to the present invention.

FIG. 2 is an explanatory top view of FIG. 1;

FIG. 3 is a flowchart showing steps in the disassembly method.

FIG. 4 is a partial explanatory view schematically showing a disassembled state of a tower-like structure.

FIG. 5 is a schematic explanatory view schematically showing a base holding device for holding a chimney.

FIG. 6 is an explanatory top view showing another embodiment from above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Iron tower 11 Ground surface 12, 26 Lower position 14, 14 'Base holding device 15 Arm 16 Frame 17 Upper position 18a, 18b, 18c, 18d Branch line 20a, 20b, 20c, 20d Attitude control device 22, 28 Lower end 24 Chimney

Claims (6)

[Claims] 1. A dismantling method of a tower-like structure in which a tower-like structure is dismantled sequentially from a lower end side, wherein an upright supporting step of supporting the tower-like structure so as to be always upright; A lower holding step of holding the weight of the tower-like building with a holding force capable of supporting the lower end, and a lower end removing step of removing a lower end of the tower-like building located below the held lower position by a predetermined length; A structure lowering step of lowering the tower-shaped structure by lowering the held lower position, and a holding position changing step of changing the holding position of the tower-shaped structure and holding the tower-shaped structure above a predetermined length again. Dismantling method of tower-like structure characterized by the above-mentioned. 2. The method for dismantling a tower-like structure according to claim 1, wherein the upright support step supports the upper position of the tower-like structure from at least three directions obliquely downward with the same tensile force. . 3. A tower building dismantling apparatus for sequentially disassembling a tower building from a lower end side, wherein an upper position of the tower building is pulled from at least three directions obliquely downward with the same tensile force. Upright support means for always keeping the tower structure upright; lower holding means for holding the lower position of the tower-like structure with a holding force capable of supporting the entire weight of the tower-like structure; and the tower-like shape held by the lower holding means. Holding position changing means capable of moving the holding position of the structure in the vertical direction, and the lower position where the lower end portion of the tower-like structure located below the holding position is removed after a predetermined length is removed. The tower-like structure is lowered by moving down, and the holding position is changed, and the tower-like structure is sequentially dismantled from the lower end side while holding the upper part again for a predetermined length. 4. The upright support means always supports the tower-like building in an upright state by adjusting the tension and length of the branch line using a branch line.
3. The dismantling device for a tower-like structure according to item 1. 5. The lower holding means has a plurality of arms capable of holding a lower position of the tower-like structure, and holds the lower position of the tower-like structure by the arms. 4. The dismantling device of the tower-like structure according to 3. 6. The lower holding means has a plurality of holding portions capable of holding a lower position of the tower-like structure from at least two directions, and holds the lower position of the tower-like structure by the holding portion. The apparatus for dismantling a tower-like structure according to claim 3, wherein the tower-like structure is held by a holding force capable of supporting the entire weight of the tower-like structure.