JPH0784796B2 - Horizontal cutting and demolition equipment for reinforced concrete structures - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal cutting and demolishing method for buildings, bridges, foundations, large plants, subways, nuclear power plants and other reinforced concrete structures.

[0002]

2. Description of the Related Art Conventionally, as a dismantling device for a reinforced concrete structure, a device that destroys by utilizing the expansion pressure or gas pressure of explosives or chemicals, a steel ball, a vibration hammer, a device that crushes by hydraulic pressure, and a disk Known are blades and devices for cutting with a water jet utilizing water pressure.

[0003]

However, any of the above-mentioned construction method of destroying with explosives or the like and device of crushing with steel balls or the like is suitable for completely dismantling the target structure, and therefore, It can hardly be used for partially decomposed products. Further, in these dismantling devices, the influence of the blast, vibration, impact noise, noise, dust, etc. on the surrounding environment is large, so that the place of use and the use conditions are severely limited.

On the other hand, the device for cutting by the rotation of the disk-shaped blade is suitable for the partially disassembled body of the construct, and is widely used for the work such as the reinforcement and the extension / reconstruction due to the aging of the construct. However, the blade type cutting machine is inferior in cutting ability because it is reduced in size and weight for the convenience of blade manufacturing and handling, the cutting cross-sectional area is limited to a narrow range, and the cutting thickness is 30 to 30. The maximum is about 40 cm.
Further, in the case of such partial cutting by rotation of the disk-shaped blade, there is a problem that overcut is required even at unnecessary cutting points, and a blade type cutting machine can be installed along the guide rail attached to the wall surface to be cut. The conventional method of driving the vehicle for traveling has problems in safety and workability.

A device for cutting with a water jet using water pressure can also be used for the partially decomposed body of the structure, but the cutting ability is extremely poor and large mechanical equipment is required, and the cutting surface spreads radially. There was a practical difficulty.

Therefore, an object of the present invention is to provide a required portion of a reinforced concrete structure, including internal reinforcing bars, without being restricted by the cutting cross-sectional area, cutting thickness, cutting height, and position thereof, and at an extremely high cutting speed. Another object of the present invention is to provide a disassembling device that can be accurately and efficiently operated and safely and can be horizontally disassembled and disassembled in a state where the influence on the external environment such as vibration, noise, and dust is extremely small.

[0007]

A horizontal cutting and disassembling apparatus for a reinforced concrete structure according to the present invention is a rack fixed so that a rotation angle around an axis can be adjusted with respect to a support, a self-propelled table fitted to the rack, A drive wheel that stretches an endless cutting cable fixed to the self-propelled table and has ultra-hard beads attached to the wire at an appropriate pitch on a reinforced concrete structure, a drive device that drives the drive wheel, and a support on the self-propelled table The self-propelled table moving device is configured to move the self-propelled table by driving the pinion that meshes with the rack according to the tension of the wire saw.

[0008]

In the above, the driving of the cutting cable is carried out by the driving wheel which is rotationally driven by a hydraulic motor, an electric motor or other prime mover, and the cutting cable is arranged between the driving wheel and the reinforced concrete structure. The direction of travel of the cutting cable can be freely changed by adjusting the angle of the rotation surface of the drive wheel and erection of pulleys at each bending point. Also, by rotating the rack around the axis with respect to the support, the drive wheels are oriented at an arbitrary angle,
Further, the traveling cutting cable is urged in a required direction so as to be constantly maintained at a required tension, and the tension is maintained or adjusted along with the progress of cutting and disassembling, for example, the drive wheel together with its accessory equipment. It can be performed by gradually moving it to the rear.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. FIG. 1 is a perspective view of a self-propelled table for explaining an example of a cutting and dismantling device for a reinforced concrete structure according to the present invention. In FIG. 1, the height can be adjusted on the road surface in front of the columnar reinforced concrete structure 1. Two supports 2,2a
Is temporarily fixed by an anchor or the like (not shown) in a stationary state, and the cylindrical rack 3 with gears is fixed to the supports 2 and 2a so that the rotation angle around the axis can be adjusted. A self-propelled table 4 which is a wire saw driving device is fitted in the rack 3 so as to be movable in the axial direction.

On the self-propelled base 4, a drive wheel 5, a hydraulic motor for rotating the drive wheel, a drive wheel rotating mechanism 6 including a continuously variable transmission, a pinion 7 meshed with the rack 3 and the like. A pinion rotating mechanism 8 including a hydraulic motor for rotating and driving the vehicle is mounted. Further, a hydraulic control box 10 is mounted on the drive wheel rotating mechanism 6 and the pinion rotating mechanism 8 via a flexible hydraulic hose 9. It is connected. Further, the cutting cable 1 is provided between the drive wheel 5 and the planned cutting start portion on the surface of the reinforced concrete structure 1.
1 is endlessly hung.

The cutting cable 11 has a diameter of 5 mm as shown in FIG.
Outline 1 having diamond wire surface layer on Ruwire 12
20 to 30 cylindrical beads 13 with a length of 0 mm and a length of 10 mm
Cylindrical beads 1 that are loosely fitted in mm pitch and are adjacent to each other
Similarly, the coil spring 14 is loosely fitted between 3 and 13,
It is bendable with a minimum diameter of 100 mm. The beads 13 may be super hard ones capable of cutting concrete layers including concrete bars, concrete blocks, bricks, etc., and ceramics other than diamond may be used. -It may be fixed to the luer wire. Further, the steel wire 12 is fixed by attaching a clip 18 for each block, which is formed by repeating an appropriate number of beads 13 and a coil spring 14, to restrict free movement between the blocks. Although the coil spring 14 is useful as a bendable spacer, it may be replaced with a cylindrical sleeve as long as the bendability of the steel wire 12 is not impaired, and this cylindrical sleeve is used as a wire. It may be fixed appropriately, or only the beads 13 may be exchangeably fixed to the steel wire 12 at a required pitch.

In the above structure, the cutting cable 11
Is circulated at a speed of, for example, 15 to 40 m / sec by the rotational drive of the drive wheel 5 by the operation of the drive wheel rotation mechanism 6, and at the same time, the pinion 7 is rotationally driven by the operation of the pinion rotation mechanism 8. When the self-propelled table 4 is accordingly urged rearward by the movement along the rack 3 and pulled backward with a tension of, for example, 50 to 200 kg, the reinforced concrete structure 1 is completely cut and disassembled including the internal reinforcing bars. In the above-mentioned cutting and disassembling work, it is usually necessary to constantly pour water into the cutting site for cooling, lubrication, cleaning and the like.

As described above, in the apparatus for moving the self-propelled table 4 along the rack 3, the self-propelled table 4 runs away immediately after the cutting and dismantling of the reinforced concrete structure 1 or when the cutting cable 11 is suddenly broken. It is safe because there is no risk of the cutting cable 11 jumping or bouncing.

Although the rotation surface of the drive wheel 5 is adjusted to be substantially horizontal in the above description, the drive wheel 5 is required to have a rotation angle around the axis of the rack 3 with respect to the supports 2 and 2a by a known means. The heights of the supports 2 and 2a can be adjusted freely to desired directions by known means. For example, the rack 3 is shown in FIG.
When the support wheels 2 and 2a are fixed by rotating the shaft 90 degrees in any direction from the state shown in (1), the rotation surface of the drive wheel 5 becomes vertical, and in FIG. 1, the support 2 is positioned higher than the support 2a. When adjusted to, the rotation surface of the drive wheel 5 tilts upward in the direction of the reinforced concrete structure 1.

Further, by disposing one or a plurality of pulleys at a required angle between the reinforced concrete construction 1 and the drive wheel 5, the winding angle of the cutting cable 11 with respect to the drive wheel 5 can be increased. The cutting cable 11 and the cutting cable 11 can be freely bent and arranged at any length.
It is possible to freely hang the bull 11 on a required position of the reinforced concrete construct 1, and further to freely select the relative positional relationship between the reinforced concrete construct 1 and the drive wheels 5. It is also possible to chain drive the self-propelled table instead of rotationally driving the pinion by the operation of the pinion rotation mechanism and the accompanying movement of the self-propelled table along the rack.

However, as described above, the cutting cable 11 can be freely adjusted by adjusting the height and the inclination angle of the drive wheel 5 and arranging the pulleys at various places as necessary. Since it can be installed and driven, not only the above horizontal cutting of the reinforcing bar concrete structure 1, but also inclined cutting and vertical cutting at a required height, and other irregular cutting are caused by cutting thickness and cutting sectional area. It is possible regardless of size, and it is possible to cut and dismantle the reinforced concrete structure 1 in a narrow place where it is difficult to bring in a cutting device, a high dangerous place such as the roof of a building, or a dangerous place along a railroad track. Also in this case, it suffices to bend the cutting cable 11 so that it can run. Further, after disposing the cutting cable 11 between the reinforcing bar concrete structure 1 and the drive wheels 5 as described above, the dismantling operator operates the hydraulic cable at a place away from the cutting place or at a safe place. The control box 10 can be operated remotely, and in some cases, unmanned operation for a long time is also possible.

Such a cutting and disassembling apparatus for the reinforced concrete construct 1 is used not only for dismantling and dismantling for disposal, but also for the upper body of the bridge girder, public toilet, house, monument, machine foundation, pillar, etc. It is also useful for moving and storing.

With such a cutting and disassembling device, it is possible to safely and surely dismantle the chimney and the columnar rebar concrete construct 1 from the upper part to the lower part. In addition, the chimney removal work has conventionally been done by constructing a scaffold around the entire chimney and then manually cutting it from above with a blade-type cutting machine, or by attaching a hydraulic crusher to the tip of heavy equipment etc. The dismantling method of breaking is widely known, but it is dangerous because the dismantling worker needs to be always close to the cutting point in addition to the slow cutting speed by manual work, and when using a hydraulic crusher, it is noisy. However, since the vibration of the rebar concrete is scattered and drops, the safety is also a problem.

FIG. 3 is a perspective view for explaining another example of the cutting and disassembling apparatus for a reinforcing bar concrete structure according to the present invention.
In the figure, cutting end holes P, Q, R, S are preliminarily formed in the wall-shaped reinforcing bar concrete construct 101, and the cutting cable 11 is first passed between the cutting end holes P, Q. The driving wheels 5 are endlessly hung. Then, due to the traveling drive, the cut end hole P of the reinforcing bar concrete construct 101.
Between the cutting end hole Q and the cutting end hole Q is completely cut, and a disc-shaped blade is formed.
No overcut is required as in the case of partial cutting by rotating the blade. Then, by the same operation, the height and inclination angle of the drive wheels 5 are adjusted as necessary, or the vertical and horizontal pulleys, the inclination pulleys, and various other pulleys as shown in FIG. Through the cutting end holes P and Q, between the cutting end holes R and S, and between the cutting end holes S and P, a square opening is formed in the reinforcing bar concrete construct 101. Can be drilled. In the case of such a cutting and disassembling method, it is sufficient if only the cutting end hole through which the cutting cable 11 passes can be drilled. -To construct 101 can also be easily disassembled and opened.

Since the traveling drive means and the tension adjusting means of the cutting cable 11 are the same as those shown in FIG. 1, detailed description and illustration thereof will be omitted.

[0021]

INDUSTRIAL APPLICABILITY As described above, in the cutting and disassembling apparatus for the reinforcing bar concrete structure according to the present invention, the reinforcing bar concrete structure is constructed by driving and driving the cutting cable provided with the super-hard beads. Since it is dismantled by cutting, the rotational driving force and the pulling force from the drive wheels can be freely changed to the cutting cable like belt transmission or rope transmission regardless of the length and bending of the cutting cable. Can be communicated.

Therefore, in this cutting / disassembling apparatus, for cutting various reinforcing bar concrete structures in a high dangerous place such as a chimney or a rooftop of a building, a dangerous place along a railroad track, a dense place or a narrow place. When disassembling or partially cutting a rebar concrete construction that selectively cuts and dismantles only the required parts without dismantling or destroying other parts, including the internal rebar, cut the cross-sectional area and cutting thickness Without being limited, it is possible to carry out cutting and dismantling at an extremely high cutting speed, with good workability and safety, and in a state where the influence on the external environment such as vibration, noise, and dust is extremely small.

Further, since the rotation angle of the rack can be adjusted around the axis, the winding angle of the cutting cable with respect to the drive wheel driven by the drive wheel of the self-propelled table fitted in the rack can be adjusted, and the cutting cable can be adjusted. It is possible to freely hang on the required position of the reinforced concrete structure.

Further, in the present invention, the rack in which the self-propelled table on which the drive wheels are mounted is fitted is a reinforcing bar concrete.
The role of one person and two roles involved in the retreat of the self-propelled table accompanying the cutting of the structure and also in the adjustment of the tilt angles of the self-propelled table and the rotating drive wheels by adjusting the rotation angle around the axis. You can Moreover, by using the rack as described above, the device for moving the drive wheels and the self-propelled table can be designed compact in the vertical direction and the lateral width direction, which is extremely convenient when used in a narrow construction site or the like. .

As described above, since the inclination angle can be adjusted as needed, not only the above horizontal cutting of the reinforced concrete structure but also the inclined cutting at the required height, the vertical cutting, and other irregular cutting can be performed. It is possible regardless of the thickness and the cross-section area.

Since the height of the support can be adjusted,
Even if there is unevenness on the ground surface, the cutting and dismantling device can be installed horizontally by adjusting the rattling.

Further, according to this cutting and disassembling apparatus, polygonal openings can be formed in the reinforced concrete wall without overcutting.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating an example of a horizontal cutting and disassembling device for a reinforced concrete structure according to the present invention.

FIG. 2 is an enlarged cross-sectional view of an example of a cutting cable.

FIG. 3 is a perspective view illustrating another embodiment of the cutting and disassembling apparatus for a reinforced concrete structure according to the present invention.

[Explanation of symbols]

 1 Reinforced concrete structure 2 Support 2a Support 3 Rack 4 Self-propelled table 5 Drive wheel 6 Drive wheel rotating mechanism 7 Pinion 10 Hydraulic control box 11 Cutting cable 12 Steel wire 13 Beads 14 Coil spring

Continued Front Page (56) References DE BEERS INDUSTRIA L DIAMOND DIVISIOIN PTY LIMITED 1981 Issued "IDR5 / 83 VOLUME 43 NU MBER 498" 232 to 236 IL GIORNALE DELL 'INGENENER. 5-1 MAR ZO 1984 "CHIRURGIA DE L CEMENTO ARMATO"

Claims (2)

[Claims] 1. A rack fixed to a support so that a rotation angle around an axis can be adjusted, a self-propelled table fitted to the rack, and super-hard beads fixed to the self-propelled table and wires at an appropriate pitch. A drive wheel for stretching an attached endless cutting cable on a reinforced concrete structure, a drive device for driving the drive wheel, and a pinion supported by a self-propelled table and meshing with the rack are driven according to the tension of the cutting cable. And a self-propelled table moving device for moving the self-propelled table. 2. The horizontal cutting and disassembling device for a reinforcing bar concrete structure according to claim 1, further comprising a support whose height is adjustable.