JP4001332B2 - Chimney demolition scaffold device and chimney demolition method using the device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chimney demolition scaffold device and a chimney demolition method using the device, and in particular, has a double tube structure of an inner cylinder and an outer cylinder that surrounds the outer side of the inner cylinder via a predetermined gap. The present invention relates to a chimney demolition scaffold device for demolition of a chimney from above and a chimney demolition method using the device.
[0002]
[Prior art]
For example, as shown in FIG. 7B, when disassembling the chimney 103 made of low-middle reinforced concrete having a height of about 70 m, the iron ball suspended on the crane is collided to dismantle.
[0003]
On the other hand, for example, as shown in FIG. 7 (a), an inner cylinder 101 made of a metal material such as steel and a predetermined gap with respect to the inner cylinder 101 are enclosed. When disassembling a high-rise chimney 100 having a double pipe structure of a reinforced concrete outer cylinder 102 and having a height of about 150 m, the metal inner cylinder 101 must be dismantled from above by gas cutting of workers. I must. And the outer cylinder 102 made of reinforced concrete must be dismantled from the upper part by a hand chisel of a worker in a portion where the iron ball does not reach.
[0004]
Accordingly, when disassembling the high-rise chimney 100 having such a double-pipe structure, a scaffold is assembled from the ground to the top of the chimney 100, and an operator rides on the scaffold from the upper end of the chimney 100 to the inner cylinder 101 and the outer cylinder. 102 was dismantled (not shown).
[0005]
[Problems to be solved by the invention]
However, the work of building a scaffold from the ground requires a great deal of labor. In addition, it is necessary to disassemble the scaffold from above according to the height of the chimney 100 that gradually decreases as the dismantling progresses. Furthermore, since it is necessary to stably support a high-rise scaffold, it is necessary to strengthen the entire scaffold. Therefore, there is a problem that the cost required for dismantling the chimney 100 increases and the construction period becomes longer.
[0006]
The present invention has been made in view of the above-described points, and an object of the present invention is to provide a chimney demolition scaffold apparatus that can easily dismantle a chimney at low cost and a demolition method using the apparatus.
[0007]
[Means for Solving the Problems]
The invention of claim 1 has been made in order to achieve the above object, an inner cylinder, the chimney having a double pipe structure of the outer cylinder surrounding the outer via a predetermined gap with respect to said inner cylinder upper in chimney disassembling scaffold to be attached to the chimney in order to dismantle from the upper floor of the outer tube removal work having overhanging portion sized to extend from the entire periphery radially outward of the inner cylinder When the scaffolding frame member having a lower floor portion for loading possible inner cylinder removal operations in a horizontal state is supported by a plurality of struts in the inner cylinder extending downward from the upper floor, the scaffolding frame A suspension member having a lower end supported at a position below the projecting portion of the body and an upper end attached to the inner wall portion of the inner cylinder to suspend and support the scaffold frame, and an upper end and a lower end of the suspension member characterized in that it comprises a lifting means, a with an adjustable adjustment means the length between the To.
[0008]
According to the present invention, for example, a chimney demolition scaffolding device is suspended from a chimney by a crane or the like, and the lower floor portion is loaded into the inner cylinder from the upper end of the inner cylinder, and the overhanging portion is placed at the upper end of the inner cylinder. The upper stage floor part is arranged horizontally in the outer cylinder, and the lower stage floor part is arranged horizontally in the inner cylinder. And a scaffold frame is supported by the inner wall part of an inner cylinder with a raising / lowering means.
[0009]
Thereby, the worker can get on the upper stage floor part and perform the outer cylinder excision work, and can get on the lower stage floor part and perform the inner cylinder excision work.
[0010]
Then, after cutting the outer cylinder and the inner cylinder to a predetermined height position, the scaffold frame is lowered by the lifting means, and the overhanging portion is placed on the upper end of the inner cylinder newly formed by the above removal operation and locked. Let Similarly, the chimney having the double structure is sequentially disassembled from above by alternately repeating the excision work of the inner cylinder and the outer cylinder and the downward movement of the scaffold frame.
[0011]
According to this, it is not necessary to assemble the scaffold from the ground to the top of the chimney as in the prior art, and the conventional work of disassembling the scaffold according to the progress of dismantling can be omitted. Therefore, the chimney can be easily disassembled at low cost.
[0012]
And by a simple structure of the raising / lowering means, the scaffold frame body can be easily and reliably supported on the inner wall portion of the inner cylinder within the inner cylinder, and can be raised and lowered in the vertical direction.
[0014]
According to a second aspect of the present invention, in the scaffold device for chimney demolition according to the first aspect, the upper floor portion for the outer cylinder removing operation has a structure that can extend radially outward from the entire outer periphery of the inner cylinder. It is characterized by that.
[0015]
According to this invention, for example, when the inner diameter of the outer cylinder gradually increases as it moves downward from the upper end of the chimney, the upper floor can be brought closer to the inner wall of the outer cylinder, It is possible to secure a scaffold for removing the water and to perform the removal work safely.
[0016]
A third aspect of the present invention is the chimney demolition method using the chimney demolition scaffold device according to any one of the first and second aspects, wherein the scaffold frame is lowered from above the chimney to dispose the lower floor part to the inner cylinder. A first step of loading the inner cylinder from the upper end and locking the overhanging portion to the upper end of the inner cylinder; a second step of supporting the scaffolding frame body on the inner wall of the inner cylinder by the lifting means; and an upper floor portion A third step for removing a predetermined height portion from the upper end of the outer cylinder downward from the upper end of the outer cylinder, which is used as a floor part for removal work, and the scaffolding frame is raised by the lifting means, and the overhanging part is upward from the upper end of the inner cylinder A fourth step for supporting at a slightly spaced height position and the lower floor portion as a removal work floor portion, and cutting a predetermined height from the upper end of the inner cylinder to a position near the upper end support location of the lifting means The scaffold frame is lowered by the fifth step to be removed and the lifting means, and the overhanging portion A sixth step of engaged to the upper end of the inner cylinder, wherein the repeat until second step to sixth step dismantling the chimney from the top.
[0017]
The present invention specifically shows an example of a chimney demolition method using the above-described chimney demolition scaffold device, and according to this, the outer cylinder is excised with the overhanging portion placed on the upper end of the inner cylinder. Since work is performed, a stable scaffold can be provided during work. Further, when removing the inner cylinder, the scaffolding frame body is supported at a height position where the overhanging portion is slightly spaced upward from the upper end of the inner cylinder, so that the inner cylinder can be easily removed. .
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a chimney demolition scaffolding device, FIG. 2 is an explanatory view of the AA line of FIG. 1 viewed from the direction of the arrow, and FIG. 3 is a BB line of FIG. FIG.
[0019]
In the present embodiment, the chimney 100 to be dismantled is called a so-called “inner cylinder type chimney” having a double tube structure of an inner cylinder 101 and an outer cylinder 102 as shown in FIG. The cylinder 101 is configured by connecting metal pipe members having the same diameter in series. On the other hand, the outer cylinder 102 is a tower structure made of reinforced concrete, and has a shape in which the diameter gradually increases and the gap with the inner cylinder 101 increases as it moves downward from the upper end. In this embodiment, the chimney 100 is formed with a total length of 150 m, an inner diameter of the inner cylinder 101 of 3.2 m, an inner diameter of the outer cylinder at the topmost part of 4.8 m, and an inner diameter of the outer cylinder of 60 m above the ground.
[0020]
The chimney demolition scaffold 1 is lifted by a crane or the like (not shown), set on the top of the chimney 100, and moved downward as the demolition progresses. The scaffold frame 2 and the lifting means 30 are connected to each other. I have.
[0021]
As shown in FIGS. 1 and 2, the scaffold frame 2 includes an upper floor portion 4 having an overhang portion 3 having a size extending radially outward from the entire outer periphery of the inner cylinder 101, and an upper floor portion. 4 and a lower floor portion 6 that is supported by a plurality of support columns 5 extending downward from 4 and can be loaded horizontally in the inner cylinder.
[0022]
As shown in FIG. 2, the upper floor portion 4 is configured by arranging the steel beam members having a predetermined rigidity in the overhang portion 3 in a lattice shape, and a floor plate (not shown) is formed on the upper surface thereof. It is stretched out. A baggage transport hole 7 is formed at the center of the upper floor part 4, and an upper safety fence 8 is provided around the hole to prevent the operator from falling from the baggage transport hole 7. Yes.
[0023]
In this embodiment, the upper floor portion 4 has a structure that can be extended radially outward in order to cope with an increase in diameter as the inner diameter of the outer cylinder moves downward. . This extension structure is attached to the bases 11 and 12 of a double ring shape fixed to the upper surface of the overhanging portion 3 and the bases 11 and 12 over the entire circumference at equal intervals in the circumferential direction. In addition, a plurality of clampers 13 (only part of which is shown in FIG. 2) and a plurality of round bar members 14 which are clamped and fixed radially to each clamper 13 (only three of which are indicated by two-dot chain lines in FIG. 2) A floor board (not shown) is stretched over the round bar members 14. The upper stage floor 4 is extended radially outward by moving the round bar member 14 radially outward or by replacing it with a longer one and stretching a floor plate over the upper part.
[0024]
On the other hand, as shown in FIG. 3, the lower floor portion 6 has iron beam members 21 having a predetermined rigidity arranged in a grid pattern so that workers can get on and perform the disassembly work of the inner cylinder 101. The floor plate (not shown) is stretched over the upper surface. A luggage transport hole 24 is formed at the center of the lower floor section 6, and a lower safety fence 25 is provided around the hole to prevent the operator from falling from the luggage transport hole 24. Yes.
[0025]
Further, on the outer periphery of the lower floor portion 6, fixing means 26 that can fix the scaffold frame 2 in the inner cylinder 101 by projecting radially outward from the lower floor portion 6 is provided. The scaffold frame body 2 is configured so as to improve the stability during the work.
[0026]
Both ends of each beam member 21 are respectively coupled to the lower ends of the support columns 5, and U-shaped hooks 23 for attaching lifting means 30 described later are attached to the lower portions of the support columns 5. .
[0027]
The lifting / lowering means 30 supports the scaffold frame 2 on the inner wall portion of the inner cylinder 101 and moves the scaffold frame 2 in the vertical direction with respect to the inner cylinder 101. In the present embodiment, a plurality of small towings are used. It consists of a machine (lever block). The small towing machine 30 has a chain (hanging member) 32 having a hook-shaped chain hook 31 at the tip and a main body hook 33, and the chain 32 is lifted and unwound by a swinging operation of a handle 34. It has a main body 35 (adjustment means) capable of adjusting the length of 32. The small traction machine 30 having the above configuration is set by engaging the main body hook 33 with the U-shaped hook 23 of the support column 5 and attaching the chain hook 31 to the inner wall of the inner cylinder 101. Note that a shackle 36 is screwed and fixed to the inner wall portion of the inner cylinder 101 by an operator in advance in order to hook and attach the main body hook 33.
[0028]
Next, a chimney disassembly method using the chimney disassembly scaffold device 1 having the above-described configuration will be described below with reference to FIGS.
[0029]
First, the chimney demolition scaffold device 1 is lifted by a crane (not shown) and lowered from above the chimney 100, and the lower floor portion 6 of the scaffold frame 2 is loaded into the inner cylinder 101 from the upper end of the inner cylinder 101. Then, as shown in FIG. 4, the overhanging portion 3 is placed on the upper end of the inner cylinder 101 and locked (first step).
[0030]
Then, the scaffold frame body 2 is supported on the inner wall portion of the inner cylinder 101 by the small towing machine 30 which is an elevating means (second step). Here, first, the shackle that is attached to the inner wall portion of the inner cylinder 101 above the U-shaped hook 23 is the chain hook 31 of the small traction machine 30 in which the main body hook 33 is engaged with the U-shaped hook 23 of the support column 5. Attach to 36 and attach. Then, the chain 32 is wound up, and tension is applied to the chain 32 so that the overhanging portion 3 is not separated upward from the upper end of the inner cylinder 101. This operation is performed on all the small traction machines 30 provided in each column portion 5, and the scaffold frame 2 is supported on the inner wall portion of the inner cylinder 101. Then, the lower floor portion 6 is fixed to the inner cylinder 101 by the fixing means 26.
[0031]
When the fixing of the scaffolding frame 2 is completed, the operator then moves to the upper floor portion 4 and performs an operation of cutting and removing a predetermined height from the upper end of the outer cylinder 102 (third step). The outer cylinder 102 is cut by an operator's hand-chipping. In the present embodiment, a method of cutting into a block shape of about 2 m and dropping it to the outside of the outer cylinder as it is is adopted.
[0032]
When the outer cylinder 102 is cut and removed by a predetermined height, the operator then moves to the lower floor portion 6, releases the fixing of the lower floor portion 6 by the fixing means 26, and operates the small towing machine 30. Then, the scaffold frame 2 is moved up to a height position at which the overhanging portion 3 is slightly spaced upward from the upper end of the inner cylinder 101 (fourth step), and a predetermined height is cut horizontally from the upper end of the inner cylinder 101. The removal work is performed (fifth step).
[0033]
The cutting of the inner cylinder 101 is performed by gas cutting by an operator, and the cut piece is removed by dropping the inside of the inner cylinder 101 downward from the baggage conveying hole 7 as shown in FIG. As a result, the inner cylinder 101 is excised at a predetermined height from the upper end to the upper position of the shackle 36 to which the main body hook 31 is attached (position near the upper end support location), and a new upper end is provided at a location lower than before the excision. Is formed.
[0034]
When the excision of the inner cylinder 101 by a predetermined height is completed, the operator next swings the handle 34 of the small traction machine 30 to rewind the chain 32 and lower the entire scaffold frame 2, as shown in FIG. As shown, the overhanging portion 3 is locked to the new upper end of the inner cylinder 101 (sixth step). Then, the chain hook 31 of the small traction machine 30 is removed from the shackle 36 and hooked on another shackle 37 that is mounted in advance at a position below the shackle 36 and above the U-shaped hook 23 of the support column. Then, the chain 32 is wound up, and tension is applied to the chain 32 so that the overhanging portion 3 is not separated upward from the upper end of the inner cylinder 101. Thus, the scaffold frame 2 is supported on the inner wall portion of the inner cylinder 101, and the lower floor portion 6 is fixed in the inner cylinder 101 by the fixing means 26 (seventh step). Then, the operations from the third step to the seventh step are repeated, and the chimney 100 is disassembled from the upper end while descending sequentially.
[0035]
Since the outer cylinder 102 has a shape in which the diameter gradually increases and the gap with the inner cylinder 101 increases as the outer cylinder 102 moves downward, the upper floor portion 4 is radially outward as the dismantling progresses. It is extended gradually toward the direction. Thereby, the operator can approach the inner wall part of the outer cylinder 102, and can perform the removal operation | work of the outer cylinder 102 easily and reliably.
[0036]
According to the above-described chimney demolition scaffold device 1, there is no need to assemble the scaffold from the ground to the top of the chimney 100 as in the prior art, and the conventional work of disassembling the scaffold according to the progress of demolition can be omitted. it can. Therefore, the chimney 100 can be easily disassembled at low cost. In particular, when the overhanging portion 3 protrudes radially outward from the inner cylinder 101 and the scaffold frame 2 moves downward, the overhanging portion 3 is always hooked on the upper end of the inner cylinder 101, so that the scaffold frame There is no fear that the body 2 will fall, and there is an advantage that the work can be performed with peace of mind. Further, since the lifting means is configured by the small traction machine 30, the scaffold frame body 2 can be supported on the inner wall portion of the inner cylinder 101 easily and reliably with a simple configuration, and can be moved up and down.
[0037]
And according to the chimney dismantling method using the above-described chimney dismantling scaffolding device 1, the outer cylinder 102 is removed while the overhanging portion 3 is placed on the upper end of the inner cylinder 101. Can be provided. Further, when removing the inner cylinder 101, the scaffold frame 2 is supported at a height position where the overhanging portion 3 is slightly spaced upward from the upper end of the inner cylinder 101, so that the inner cylinder 101 can be easily removed. It can be carried out.
[0038]
【The invention's effect】
As described above, according to the chimney demolition scaffold device according to the present invention, the chimney demolition scaffold device is lowered from above the chimney, the lower floor portion is loaded into the inner cylinder from the upper end of the inner cylinder, and The upper part is placed horizontally in the outer cylinder, the lower stage floor is placed horizontally in the inner cylinder, and the scaffold frame is placed in the inner cylinder by lifting means. Therefore, there is no need to assemble the scaffold from the ground to the top of the chimney as in the prior art, and the conventional work of disassembling the scaffold according to the progress of dismantling can be omitted. Therefore, the chimney can be easily disassembled at low cost.
[0039]
Further, according to the chimney disassembly method using the above-described device, the outer cylinder is excised while the overhanging portion is placed on the upper end of the inner cylinder, so that a stable scaffold can be provided during the operation. Further, when removing the inner cylinder, the scaffolding frame body is supported at a height position where the overhanging portion is slightly spaced upward from the upper end of the inner cylinder, so that the inner cylinder can be easily removed. .
[Brief description of the drawings]
FIG. 1 is a front view of a chimney demolition scaffold device.
FIG. 2 is an explanatory view of the AA line in FIG. 1 viewed from the direction of the arrow.
FIG. 3 is an explanatory view of the BB line of FIG. 1 as viewed from the direction of the arrows.
FIG. 4 is a diagram illustrating a chimney disassembly method (outer cylinder disassembly method).
FIG. 5 is a diagram for explaining a chimney disassembly method (inner cylinder disassembly method).
FIG. 6 is a diagram illustrating a chimney disassembly method (scaffolding frame lowering method).
FIG. 7 is a diagram illustrating the configuration of a chimney.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Scaffold dismantling scaffold 2 Scaffolding frame 3 Overhang part 4 Upper floor part 5 Strut part 6 Lower floor part 100 Chimney 101 Inner cylinder 102 Outer cylinder

Claims (3)

In a chimney demolition scaffolding device attached to a chimney for disassembling the chimney having an inner cylinder and a double tube structure of the outer cylinder surrounding the inner cylinder through a predetermined gap from the upper part ,
Supported by an upper stage floor portion for outer cylinder removal work having a protruding portion sized to extend radially outward from the entire outer periphery of the inner cylinder, and a plurality of support columns extending downward from the upper stage floor portion. A scaffolding frame having a lower floor for inner cylinder removal work that can be loaded in a horizontal state in the inner cylinder ;
A lower end supported at a lower position than the overhanging portion of the scaffold frame, and an upper end attached to the inner wall of the inner cylinder to suspend and support the scaffold frame; and Elevating means having an adjusting means capable of adjusting the length between the upper end and the lower end;
A scaffolding device for chimney dismantling comprising: The upper floor for the outer cylinder removing work is
The scaffold device for chimney disassembly according to claim 1, wherein the scaffold device has a structure capable of extending radially outward from the entire outer periphery of the inner cylinder. A first step of lowering the scaffold frame from above the chimney to load the lower floor portion into the inner cylinder from the upper end of the inner cylinder, and locking the overhanging section to the upper end of the inner cylinder;
A second step of supporting the scaffold frame on the inner wall portion of the inner cylinder by the lifting means;
A third step of using the upper floor portion as a removal work floor portion and removing a predetermined height portion downward from the upper end of the outer cylinder;
A fourth step of raising the scaffold frame by the elevating means and supporting the protruding portion at a height position slightly spaced upward from the upper end of the inner cylinder;
Using the lower floor as the removal work floor, and cutting and removing a predetermined height from the upper end of the inner cylinder to the position near the upper end support location of the elevating means; and
A sixth step of lowering the scaffold frame by the elevating means and locking the overhanging portion to the upper end of the inner cylinder;
The chimney disassembly method using the chimney disassembly scaffold device according to any one of claims 1 and 2, wherein the chimney is disassembled from the upper end by repeating the second step to the sixth step.

Images