JPH09184306A - Method for demolishing steel building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of elevated work times, to prevent flying of powder dust, and to perform rapid demolition of even a multistory steel building. SOLUTION: Division type temporary construction works 11 provided at an upper end part with a temporary beam are built in the space part of a steel building 10, a first group of jacks 13 are attached to the temporary beam 12, and temporary frames 14 are built at the upper end of the steel building. A second group of jacks 15 are attached to the temporary frames 14 and the steel building is demolished. With the steel building suspended by a first group of the jacks, the steel building is cut into blocks from the lower end side. By removing the cut blocks, the steel building is jacked down. Thereafter, with a division type temporary construction work suspended by a second group of the jacks, temporary construction work blocks on the lower end side of the division temporary construction works are removed. The removed temporary construction work blocks are eliminated and the division type temporary construction works are jacked down.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dismantling method of a steel building such as a boiler / steel building, and more particularly to a dismantling method suitable for a high-rise steel building.

[0002]

2. Description of the Related Art Conventionally, the dismantling work of boilers, steel-framed buildings, etc. has been muffled from low-rise boilers, steel-framed buildings, etc. to high-rise boilers, steel-framed buildings, etc. Had been finished at the bottom of. However, in the above conventional dismantling method, it is necessary to install a large-scale dismantling device on the upper part of the steel frame building, and this installation work is extremely difficult. In addition, it is necessary to sequentially move the large-scale dismantling device from the upper part to the lower part, which requires a separate device for this movement, and the moving work has been a factor of increasing the number of man-hours and the construction period. In addition, there was a problem of scattering of dust and dust generated by dismantling work in the upper part of the steel frame building and falling objects.

As an example of the above countermeasure, Japanese Patent Laid-Open No. 2-244
There is a dismantling method disclosed in Japanese Patent Publication No. 55 (hereinafter referred to as prior art document 1). As shown in FIG. 9, a temporary foundation 2 is provided around the building 1, a detachable truss 4 is erected in multiple layers on the temporary foundation 2 through a plurality of jacks 3, and the truss 4 and The building 1 and the building 1 are fixed at a plurality of points, and each time the lower layer portion of the building 1 is dismantled, one layer of the lower layer portion of the truss 4 is removed, and this is repeated to repeat from the lower layer portion of the building 1. It is a method of dismantling a building that is to be dismantled.

As shown in FIG. 10, the truss 4 is constructed by combining a flat hexagonal block 5 and H steel 6, and
The block 5 is located at each vertex of the triangle defined by the steel 6. The blocks 5 and the H steel 6 are detachably bolted.

[0005]

The demolition method disclosed in the prior art document 1 is expected to have effects such as installation of a demolition device, prevention of scattering of dust and dust, and prevention of falling objects in a high-rise steel building. However, in the above demolition method, the truss 4 needs to be erected on the peripheral surface of the building 1, and in the case of the high-rise building 1, an enormous number of trusses 4 are required, and the assembling and dismounting thereof are complicated. In addition, at the time of dismantling, it is necessary to remove the support member of the truss 4 for each dismantling site of the building 1, which requires time for dismantling work. Therefore, there is a problem that the higher the building 1, the more complicated the demolition work becomes, and the more the number of man-hours and the work period are likely to increase.

The present invention is intended to solve the above-mentioned problems, and reduces the work at high places, prevents the scattering of dust and the like, and makes it possible to quickly dismantle a high-rise steel building. The purpose is to provide a method of dismantling a building.

[0007]

According to the present invention, a split type temporary frame having a temporary beam at its upper end is provided in a space of a steel frame building, and a first group of jacks is attached to the temporary beam, and This is a method for dismantling a steel frame building, in which a temporary frame is installed at the upper end, a second group of jacks is attached to the temporary frame, and the steel frame building is disassembled by the following steps. (A) While suspending the steel frame building with the first group of jacks, cutting the steel frame building from the lower end side, (b) Removing the cut block and jacking down the steel frame building, (c) Next, while suspending the split type temporary frame with the second group of jacks, the step of removing the temporary frame block on the lower end side of the split type temporary frame, (d) removing the removed temporary frame block, and dividing type temporary frame frame The step of jacking down the steel frame building from the lower end side to the upper end side while alternately repeating the steps of (e), (i) to (d). Since the present invention has the above-mentioned configuration, first,
If you suspend the steel frame building with the first group of jacks and the split-type temporary frame with the second group of jacks, jack down is repeated alternately in the same suspended state, and the steel frame building is continuously lowered. It can be dismantled from side to top side.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. 1 to 8 are side views showing the state of the steps of one embodiment of the present invention. FIG. 1 is a side view showing a state in which a temporary frame, a jack and the like required for the dismantling method of the present invention are installed in a boiler / steel frame building. The height of the steel frame building is indicated by the symbol L. In FIG. 1, reference numeral 11 denotes a split type temporary frame to which a temporary beam 12 is attached at the upper end. The first group of jacks 13 is attached to the temporary beam 12 so that the boiler / steel frame building 10 can be suspended from above. The split-type temporary frame 11 has a structure in which a plurality of temporary frame blocks 11a are assembled, and is removable. Split type temporary frame 11, first group jack 1
3 and the like are installed in the space of the steel building 10 to be dismantled.

On the other hand, a temporary stand 14 is installed at the upper end of the steel building 10, and the second group of jacks 15 are mounted on the temporary stand 14.
Is installed. Here, the temporary mount 14 is installed by penetrating the roof of the steel frame building 10. The second group of jacks 15 allows the split type temporary frame 11 to be suspended. The numbers of the first group of jacks 13 and the second group of jacks 15 are appropriately set depending on the steel frame building 10 to be disassembled.

FIG. 2 is a side view showing a state where the lower end block of the boiler / steel frame building is cut. While the boiler / steel frame building 10 is suspended by the jacks 13 of the first group, the lower end side of the boiler / steel frame building is block-cut at a predetermined height position. The block cutting is performed by welding cutting or the like which is usually used. Since these are performed by providing a cutting device on the floor surface, the work is easy.

FIG. 3 is a side view showing a state in which the boiler / steel frame building is jacked down. The cut block is removed, and the boiler / steel frame building 10 is jacked down by the first group of jacks 13. The boiler / steel-frame building 10 that has been jacked down is lowered by (L-d) and placed on the temporary support table 16 with a guide. It can also be fixed if necessary.

FIG. 4 is a side view showing a state where the temporary frame block is removed. The temporary frame block is removed while the split type temporary frame 11 is suspended by the second group of jacks 15. Since the temporary frame block is fastened with pins or bolts (not shown), it can be easily removed.

FIG. 5 is a side view showing a state in which the split type temporary frame is jacked down. The split type temporary frame is jacked down by the second group of jacks 15. The jacked-down split type temporary frame is fixed to the pedestal 17 by pins or bolts.

FIG. 6 is a side view showing a state in which the dismantling of the boiler / steel frame building is completed. While repeating the steps of FIGS. 2 to 5, disassembly is performed until (Ld) becomes 0. Here, the dismantling of the boiler / steel building 10 is completed, and the temporary pedestal 14 installed at the upper end of the boiler / steel building 10 reaches the floor surface. The last temporary frame block of the split type temporary frame 11 is suspended by the second group of jacks 15.

FIG. 7 is a side view showing a state in which the last temporary frame block is removed. The last temporary frame block of the split type temporary frame 11 is suspended and removed by the second group of jacks 15, and the temporary beam 12 is suspended.

FIG. 8 is a side view showing a state in which the temporary beam is jacked down. The temporary beam 12 is jacked down. At this stage, the temporary beams 12, the temporary pedestal 14 and the like are all removed, and the dismantling of the boiler / steel frame building 10 is completed.

In the above embodiment, the dismantling of the boiler / steel frame building 10 is described. However, even when the boiler equipment is suspended inside the steel frame building, the boiler equipment is similarly cut and disassembled together with the steel frame building. You can

According to the present invention, the following effects can be obtained. Since the steel frame building is jacked down by alternating operation of two jack groups, dismantling work can be performed extremely quickly and the construction period can be shortened. Since the steel frame building is dismantled from the lower part to the upper part, the work of cutting and removing can be always performed at a predetermined position on the floor surface, which is safe, has high work efficiency, and can reduce man-hours. Further, since the dismantling work is performed at a low position, dust and the like are less scattered, and there is no danger of falling objects.

[0019]

As described above, according to the dismantling method according to the present invention, it is possible to reduce work in high places, prevent scattering of dust and the like, and quickly dismantle even a high-rise steel building.

[Brief description of the drawings]

FIG. 1 is a temporary frame structure necessary for a dismantling method of the present invention,
It is a side view which shows the state which installed the jack etc. in the boiler and steel-frame building.

FIG. 2 is a side view showing a state where the lower end block of the boiler / steel frame building is cut in the dismantling method of the present invention.

FIG. 3 is a side view showing a state in which the boiler / steel frame building is jacked down in the dismantling method of the present invention.

FIG. 4 is a side view showing a state where a temporary frame block is removed in the dismantling method of the present invention.

FIG. 5 is a side view showing a state in which the split type temporary frame is jacked down in the dismantling method of the present invention.

FIG. 6 is a side view showing a state in which the dismantling of the boiler / steel frame building is completed in the dismantling method of the present invention.

FIG. 7 is a side view showing a state in which the last temporary frame block is removed in the dismantling method of the present invention.

FIG. 8 is a side view showing a state in which the temporary beam is jacked down in the dismantling method of the present invention.

FIG. 9 is a diagram showing an example of a conventional method of dismantling a building.

FIG. 10 is a diagram showing an example of a steel frame truss used in FIG. 9.

[Explanation of symbols]

 10 Boiler / steel frame building 11 Split type temporary frame 11a Temporary frame block 12 Temporary beam 13 First group jack 14 Temporary frame 15 Second group jack 16 Temporary cradle with guide 17 Cradle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hitoshi Kiyota 1-3-13 Takanawa, Minato-ku, Tokyo Sumio Kowa Takanawa Building, Toden Kogyo Co., Ltd. (72) Inventor Masahisa Furuichi, Kanda Jinbocho, Chiyoda-ku, Tokyo No. 4 Taihei Electric Co., Ltd.

Claims (1)

[Claims] 1. A split type temporary frame having a temporary beam at the upper end is provided in the space of the steel frame building, a first group of jacks is attached to the temporary beam, and a temporary frame is installed at the upper edge of the steel frame building. Then, attach the second group of jacks to the temporary mount,
Steel frame building dismantling method characterized by dismantling the steel frame building by the following steps. (A) While suspending the steel frame building with the first group of jacks, cutting the steel frame building from the lower end side, (b) Removing the cut block and jacking down the steel frame building, (c) Next, while suspending the split type temporary frame with the second group of jacks, the step of removing the temporary frame block on the lower end side of the split type temporary frame, (d) removing the removed temporary frame block, and dividing type temporary frame frame The step of jacking down the steel frame building from the lower end side to the upper end side while alternately repeating the steps of (e), (i) to (d).