JPS6225672A - Disassembling of chimney - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to reinforced concrete T! This is related to the demolition method for J chimney.

Conventional technology When dismantling a reinforced concrete chimney,
As shown in Fig. 7, a scaffold 2 is erected around the outer peripheral wall of the chimney 1, and a worker 3 from the scaffold 2 destroys the concrete of the chimney 1 using a chisel tool 4 such as a breaker or a coal pick hammer. , Chimney 1 was being dismantled.

Problems to be Solved by the Invention However, according to the above-mentioned conventional construction methods, there are two problems: (1) Noise is generated, and work is subject to time and location restrictions from the perspective of noise pollution prevention; There are health and safety problems for the worker 3, such as the vibration of the tool 4 causing injury to the worker's body, the work being performed at heights requiring human power, resulting in loss of stability, and the scattering of concrete powder. Furthermore, there is the problem that (1) more work days and manpower are required due to work time constraints and inefficiency, resulting in an increase in construction costs.

An object of the present invention is to provide a chimney dismantling method that eliminates the above-mentioned problems.

Means for Solving the Problems In order to solve the above problems, the chimney demolition method of the present invention is as follows:
A concrete breaking device is installed inside a reinforced concrete chimney, and is equipped with a rod that can be moved in and out using at least a substantially horizontal two-way cylinder device, and a blade is attached to the tip of at least one of the rods. It is suspended horizontally so that it can be raised and lowered and rotated freely, and the concrete of the chimney is destroyed by activating the cylinder device to push the blade into the inner circumferential wall of the chimney, and then the blade is retracted to The concrete breaking device is lowered or rotated four times, and the concrete in a new location is destroyed in the same manner as the above method,
Thereafter, the method is characterized in that the concrete of the chimney is destroyed by not repeating the method.

Effect In the above configuration, when the blade part is pushed out by the cylinder 8 and pushed into the inner circumferential wall of the chimney, unlike conventional chisel work, I! The concrete of the chimney is destroyed without generating any noise or vibration. Once 1 g of concrete has been destroyed, the blade is retracted and the concrete breaking IIF device is moved up and down or rotated to a desired extent to destroy concrete in a new location. After that, by repeating this method, the concrete of the chimney is destroyed and the chimney is dismantled.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 6.

Concrete fracture #i used in the construction method of this example
As shown in FIG. 6, the device 10 includes a cylindrical intermediate member 1.
Two hydraulic (or air) cylinders 8 and 12 on both end faces of 1
a and 12b are fixedly installed. A closing fitting 13 is fixed to the center of the intermediate member 11.

Each cylinder device 12a, 12b has a cylinder 14a
.

A piston 15a is slidably fitted inside the piston 14b.

Rods 16a and 16b are supported on 15b so that they can move in and out.

A sharp blade portion 17 is attached to the tip of one of the rods 16a, and a stop plate 18 is swingably attached to the tip of the other rod 16b. Each cylinder 14a, 14b has one end of each of the four hoses 19 connected to each piston 15a.

It is connected so as to communicate with the internal space on both sides of 15b, and the other end is connected to the drive unit 20 (see FIG. 1).

First, as shown in FIGS. 1 and 2, the outer foot f322 is attached to the outer wall of the reinforced concrete chimney 21 to be demolished.
are assembled, and a plurality of beams 23 are constructed on the top of the outer leg @22. The outer wall of the chimney 21 is covered with a scattering protection material 24 for safety. A disc-shaped tail scaffold 26 is placed inside the chimney 21 from the beam 23 via a lifting device 25 such as a plurality of electric chain blocks. ? 11111 Can be hung freely. Concrete destruction gvIio is carried out by lifting the scaffolding 26 from the central beam 23 via a separate lifting device 27 with the hanging fittings 13.
Above? It is suspended horizontally so that it can be lowered and rotated freely. A driving unit]-20 is mounted on the upper surface of the hanging scaffold 26. Each lifting device 25, 27 can be remotely controlled from the suspension leg gA26.

Next, the worker (not shown) gets on the hanging leg @26hi and
The hanging scaffolding 26 and the concrete breaking device 10 are stopped at an appropriate position near the top of the chimney 21 by the molding devices fi25 and 27. The blade part 17 is directed to an appropriate position on the inner circumferential wall of the chimney 21, and both cylinder devices 12 are moved by the drive unit 20.
a and 12b are activated to push out the blade portion 17 and push it into the inner circumferential wall of the chimney 21, and at the same time push out the contact plate 18 and bring it into contact with the inner circumferential wall on the opposite side. As a result, the blade portion 17
destroys one part of the concrete in chimney 21.

Next, the blade part 17 is retracted by the drive unit 20, and the concrete breaking LWi device 10 is rotated or raised/lowered to remove the blade part 17.
7 to the next destruction position, and destroy the concrete of the chimney 21 in the same manner as above. It is preferable to move the blade part 17 in a spiral shape to ensure stability during dismantling and lifting.Also, it is preferable to form a notch groove in the concrete surface with a cutter or the like in advance (this will make it easier to move the blade part 17). Therefore, it is effective.The reinforcing bars remaining after destroying the concrete are removed as appropriate using gas cutting, cutters, etc.

As described above, the chimney 21 is dismantled one by one starting from the top, and as shown in Fig. 3, if it is dismantled to an appropriate height,
As shown in FIG. 4, a separate beam 23a is erected at an appropriate height on the outer scaffolding 22, and a separate beam 23a is installed from the beam 23a. I!
The devices 25a and 27a break the suspended scaffolding 26 and concrete if? The apparatus 10 is resuspended as before, and the excess toothpick apparatuses 25, 27, beams 23, and upper parts 22a, 22b, and 22c of the outer scaffolding 22 are removed in order as shown in FIG. After that, the above demolition work will resume.

Thereafter, by repeating each of the above operations, the reinforced concrete chimney 21 is sequentially dismantled starting from the top.

Note that the lifting devices 25 and 27 are not necessarily limited to electric types, and may be manually operated chain blocks, chill holes, or the like. In this case, the folding may be changed for each operable range from the hanging scaffold 26. Moreover, it is naturally necessary to stretch the disaster prevention sheet 28 around the outer periphery of the outer scaffolding 22 for safe work.

Effects of the Invention As described above, according to the present invention, the hydraulic cylinder H
[Since the chimney concrete is destroyed using a non-vibration, non-impact concrete breaking device by I, no noise is generated due to impact or vibration sounds.

Therefore, demolition work is not subject to time or place restrictions, and work can be carried out at any time, even in places near private houses, hospitals, schools, etc. In addition, there is no vibration-related damage to the worker's body, and almost no human power is required, so high-place work can be done safely and efficiently, which is excellent in terms of safety, health, and efficiency. Furthermore, since concrete powder is not generated or scattered when concrete is destroyed, the working environment becomes sanitary. Furthermore, since there are no restrictions on work time, it has great effects, such as shortening the construction period and reducing construction costs.

[Brief explanation of the drawing]

Figures 1 and 3 to 5 are cross-sectional views showing each process in an embodiment of the present invention, Figure 2 is a plan view of Figure 1, and Figure 6 is an implementation of the concrete breaking device of the present invention. FIG. 7 is a sectional view showing an example of a conventional demolition method. 10... Concrete breaking device, 12a, 12b
... Cylinder device, 16a, 16b... Rod, 1
7... Blade, 21... Chimney agent Morimoto
Yoshihiro Figure 3 Figure 4 Lee ml

Claims (1)

[Claims] 1. A concrete breaking device, which is equipped with a rod that can be moved in and out by at least a substantially horizontal two-way cylinder device and has a blade attached to the tip of at least one of the rods, is installed in a reinforced concrete chimney. It is suspended horizontally inside so that it can be raised and lowered and rotated freely, and the concrete of the chimney is destroyed by operating the cylinder device to push the blade into the inner circumferential wall of the chimney, and then the blade is retracted. The chimney is characterized in that the concrete in the chimney is destroyed by raising, lowering or rotating the concrete breaking device, destroying concrete in a new location using the same method as the method described above, and repeating the method thereafter. demolition method.