JPS62220659A - Method for cutting and disassembling cylindrical structure - 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] [Industrial Application Field] The present invention provides a method for cutting and dismantling cylindrical structures made of concrete, such as hazardous materials storage facilities, super-high chimneys, or bridge piers. It is related to.

[Technical front and conventional technology] For example, in the demolition of a super high chimney, or the demolition/renovation of a bridge pier, etc., it is necessary to minimize the demolition, dust scattering, and noise that occur during work. In addition, in hazardous materials storage facilities that store hazardous materials such as radioactive materials, prevention of scattering of dismantled pieces and dust contaminated with hazardous materials and remote control of operations are particularly important issues.

Generally, the demolition of concrete structures is carried out using pneumatic jackhammers,
A method of crushing with a hydraulic crusher or the like has been adopted, but with either method it is difficult to prevent the scattering of cut pieces and dust and noise, and it is also difficult to apply in narrow spaces.

[Object of the Invention] An object of the present invention is to provide a method for dismantling a cylindrical reinforced concrete structure by cutting and transporting the cylindrical structure into blocks by remote control.

[Structure 1 of the Invention The cutting and dismantling T method of the present invention includes the steps of equally dividing the stuff into constant rotation angles, and creating a block diagram in the radial and axial directions using a constant 31 method. The process consists of step T, in which the block is cut by abrasive jet cutting from above toward 17'>, and step (2), in which the cut-off block is grasped and carried out to one side of structure I.

[Operations and Effects of the Invention] Since the cutting and dismantling method of the present invention has the following structure, it can be easily used even when dismantling, for example, a structure made of reinforced concrete in a hazardous materials storage facility. The structure is cut into blocks by remote control, and the separated blocks are held in place and carried outside, allowing for safe and reliable disassembly without posing any danger to the human body.

[Example 1 Hereinafter, the present invention will be explained with reference to the drawings.

Figure 1 shows the cutting and demolition method of the present invention, for example, for hazardous materials storage viI.
This shows a case where the method is applied to a concrete structure of M stages, and the inside of the concrete structure 2 is cut and dismantled using the method of the present invention to remove contamination.

] The concrete structure 2 has a complex external shape,
Further, the internal cavity 3 is also formed in a multi-phase shape to accommodate the storage container. In this embodiment, the inside of the concrete structure after the storage container has been removed is removed by cutting it into a cylindrical shape.

When implementing the cutting and demolition method, first
The fIM king order is determined depending on the type of S, but in this embodiment, the entire 1rea 1 is divided into sections from A to 1. Then, the cutting length of the cutting block is determined according to the size and shape of each section. Concrete 1~
When cutting and dismantling a structure, it is necessary to divide each section into small blocks and cut them out for post-processing.

In this example, considering that the cut blocks will be held and transported by 11 customers and stored in a container, the basic four dimensions of the block are 40 cm in height, 40 cm in thickness in the radial direction, and 40 cm in the circumferential direction. A width of 100G was adopted, and each section in the axial direction was divided into blocks as shown in the horizontal cross-sectional views of FIGS. 2 to 6. That is, the block in section A1 is divided into 18 parts at every rotation angle of 20 degrees, as shown in FIG.

Similarly, part A2 is divided into 18 parts with a rotation angle of 20 degrees.

In the horizontal section of blocks B and D in the section shown in Figure 4,
Since the radial thickness dimension to be cut is large, the block is divided into inner blocks B1, Dl and outer blocks B2, D2, l'31 and DI are divided into 15 parts at a rotation angle of 24 degrees, and B
2, D2 is divided into 18 parts with a rotation angle of 20 degrees.

Section C has a larger radial dimension, and as shown in FIG. 5, the inner block C1 is divided into 12 parts with a rotation angle of 30 degrees, the central block C2 is divided into 15 parts with a rotation angle of 24 rf1, and the outer block C3 is divided into 15 parts with a rotation angle of 20 degrees. 'IF is divided into 18 parts. Block E of the section shown in FIG. 6 has a rotation angle of 2.
It is divided into 15 by 4 degrees.

Next, the cutting means applied to the present invention will be explained.

As a cutting method for this type of concrete structure, it is essential to be able to perform remote control in order to avoid radiation contamination, and it is also necessary to take measures such as preventing the scattering of generated dust. For this purpose, there are controlled blasting methods using gunpowder, mechanical cutting methods using diamond power vines and core boring machines, thermal cutting methods that melt the concrete with high-temperature gas, and abrasion methods that use high-pressure water with abrasives added. Although abrasive jet cutting methods and the like have been developed, this embodiment employs an abrasive jet cutting method.

The equipment used for this abrasive jet cutting method is
As shown in FIG. 7, a mixing chamber 21 is attached to the tip of a water nozzle 20 that communicates with a high-pressure water pump. An abrasive material 23 is supplied to the mixing chamber 21, and an appropriate material such as sand or cast steel is used as the abrasive material 23. The high-pressure water mixed with the abrasive material in the mixing chamber 21 is injected as a jet stream from the abrasive nozzle 22 at the tip, easily cutting even reinforced concrete.

The overall configuration of the cutting and demolition equipment equipped with this abrasive jet nozzle is as shown in FIG. The section 1 is cut and dismantled from the internal space 3 side.

Inside the container 5, there are running lanes 6, etc., so the main trains ↑・) 1 to 7 are inserted into the space 3 using this. Main part 1! 71-7's 1-lower end is fixed respectively! i; It is fixed at a predetermined position in space at position 8.18.

A cutting device 10 and a block gripping/unloading device 11 are attached to the main shaft 7, and the main shaft 7 can be rotated and operated in one small direction. Step G on the outside of hazardous materials storage building 5
In the pump chamber 15, an ultra-high pressure pump 16 and an abrasive supply device F716 are provided, and ultra-high pressure water and abrasive material are supplied to the cutting device 10 to perform cutting in the manner described above.

On the other hand, the block gripping and carrying out device 11 is equipped with a mani-picolator device, and the cut blocks are carried out to the outside of the structure in the manner described later, stored in the antenna of the cart 14, and passed through the air lock 9. and transport it outside hazardous materials storage building 5.

These series of operations are controlled by commands A1 from a control panel 13 provided in the central operator's cab 12. Next, the process of cutting and transporting blocks using this cutting and dismantling device will be explained with reference to FIG.

Figure 9 (a) shows the horizontal cut of the block.
The cutting device 10 attached to the main shaft 7 is rotated, and the abrasive jet jetted from the abrasive jet nozzle 22 at the tip cuts the blade C1 in the horizontal direction. Next, as shown in FIG. 9 (b), the cutting tool M
10 by -1 turn to cut the block C1 in the vertical direction. In (c), the back surface of the block C1 is cut. At this time, the tip 25 of the abrasive jet nozzle 22 is directed diagonally downward to cut the back surface of the block. As a result, the block C1 is separated from the structure. As shown in Section 91 (d) of e1, the cutting device 10 has been separated.
is retracted downward along the main shaft 7, and the block gripping device 11 is lowered to the cutting part.

This (1 gripping device 17) is equipped with a mani-picolator 30 at its tip, and the device 1 that grips the block C1
1 is placed upside down and on top of the structure 1 as shown in FIG. 9(E), and the block C1 is stored in the container 35 (FIG. 9(F)). This container 35 has been sent to the storage position by the cart 14, and after the container 35 containing the block C1 has been fitted with a lid 36, the container 35 is moved to the storage position by the cart 14.
It is sent to Aerotsuku 9 (Figure 9 (g)). Each step of cutting, cutting out, and carrying out the block is carried out using a shuttle as shown on the L-shape. Next, the order of the cutting steps for each section will be explained with reference to FIGS. 10(a) to 10(1).

In the cutting method of the present invention, it is necessary to cut the block from above in order to transport the cut block upward by the gripping device.

That is, among the block divisions shown in FIG. 10(a), first, the block C1 of the section C that protrudes the most inwardly is cut from one side downward based on the diagram shown in FIG. 5, and then carried out ( mouth). Next, use the diagrams in Figures 2 and 3 to sequentially cut the blocks A1 and A2 in the uppermost stage (c), and cut and carry out the inner block B1 of section B shown in Figure 4 (c).
d). Next, block B2 outside section B and section ibl
The center block C2 of G and the inner block D1 of the partition are cut and carried out (d), and the remaining blocks [1 block c3,
Remove D2 (e).

At the end, only the bottom block F remains according to Figure 6 (
), cut it and carry it out to complete the entire process (10th
Figure (g)). Since the blocks in each section of J: sea urchin are sequentially cut and carried out from the -V direction, there is no waste in the procedure of holding and carrying out the blocks, and the work can be carried out safely.

[Summary] As described above, the present invention is a dangerous goods storage #1IIl! ! When cutting and dismantling a cylindrical structure such as a built-in concrete structure, main shirts 1 to 1 are placed in the internal space of the structure.
The inner wall of the '44' E1 body was sequentially cut from the top to the bottom into segments 1 and 1 using an abrasive jet cutting device attached to this main shirt, dividing it into blocks and separating them. Since the exposed blower pieces are directly transported outside using a gripping device, concrete blocks contaminated with harmful substances such as fl rays can be handled safely and reliably, stored in a container, etc., and can be removed by remote control. Demolition work can be accomplished.

In addition, select the appropriate block depending on the target structure and its dimensions.
It is natural that cutting the structure into one piece will result in a smaller diameter.The point is that by sequentially cutting the structure from the top downward, it is possible to easily grasp and carry out the work. The present invention has features.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a cylindrical structure to be cut and dismantled by applying the present invention, Fig. 2 is a horizontal sectional view of part A in Fig. 1, and Fig.
The figure is a horizontal cross-sectional view of section A2 in figure 1, and figure 4 is a horizontal cross-sectional view of section B in figure 1.
, a horizontal sectional view of section D, FIG. 5 is a horizontal sectional view of section 0 in FIG. 1, FIG. 6 is a horizontal sectional view of section E in FIG. 1, and FIG. 7 is a nozzle used for abrasive jet cutting. FIG. 8 is an explanatory diagram showing the arrangement of each device when the present invention is applied to the demolition of concrete 1/structure of a hazardous materials storage facility, and FIGS. Conceptual diagram showing the cutting and transport of the blower and the culm, Figure 10 (A) Illustrated!・)
FIG. 3 is a vertical cross-sectional view showing the construction order when each structure is cut into a block shape from above to below and carried out.

Claims (1)

[Claims] In a method for cutting and disassembling a cylindrical structure from the inner wall side,
A process of dividing the structure into equal parts at fixed rotation angles and creating a block diagram with fixed dimensions in the radial and axial directions, and cutting the structure with abrasive jet from the top to the bottom according to the block diagram. 1. A method for cutting and dismantling a cylindrical structure, comprising the steps of separating the blocks, and grasping the separated blocks and transporting them upwards of the structure.