JP3197180B2 - Demolition method 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 method for destroying a reinforced concrete structure using impact energy due to electric discharge.

[0002]

2. Description of the Related Art Conventionally, reinforced concrete structures (hereinafter, referred to as "reinforced concrete structures") have been developed.
In order to disassemble the structure, there is a method in which the structure is broken using, for example, a mechanical means (for example, an iron ball or a yumbo).

[0003]

With the above-mentioned method using mechanical means, even if the lower part of the structure above the ground can be destroyed, the structure may be used at a high place, underground foundation, or a narrow work place. Cannot destroy objects.

[0004] In addition, a large pillar or the like of a large structure has many rebars buried therein, and thus cannot be easily broken by mechanical means in many cases. Furthermore, the method using mechanical means as described above generates a large amount of noise and vibration, and cannot be used in an area where houses are densely located.

In such a case, the structure is dismantled manually using a wire saw or the like, but this is a serious operation. Therefore, an object of the present invention is to provide a method for dismantling a concrete structure capable of solving the above problems.

[0006]

Means for solving the problems of the present invention are as follows. In a concrete portion of a reinforced concrete structure, a hole for destruction reaching a predetermined reinforcing bar is formed to expose a part of the reinforcing bar. The rebar is connected to one side of the capacitor with the exposed part of the rebar as one electrode, and a thin metal wire is connected to the exposed part of the rebar, and this thin metal wire is connected to the other side of the capacitor via the other electrode and destroyed. By filling the hole with a destructive substance and discharging and supplying the electric energy stored and charged in the capacitor in a short time,
The thin metal wire is rapidly melted and evaporated to vaporize the destructive substance, and the impact force at that time destroys the concrete portion of the reinforced concrete structure, exposing more rebar, and then cutting the rebar.

In addition, a thin metal wire is inserted from a crack generated in a previously destroyed concrete portion of a reinforced concrete structure and reaching a reinforcing bar and connected to the reinforcing bar, and the connecting portion of the thin metal wire is connected to one electrode. The rebar is connected to one side of the capacitor, and a thin metal wire is connected to the other side of the capacitor via the other electrode.Fractures in the concrete part are filled with a destructive substance to reduce the electric energy charged and stored in the capacitor. By rapidly discharging and thinning the thin metal wire to vaporize the destructive substance by discharging it over time, the impact force at that time increases the cracks in the concrete part, exposing the rebar, and then cutting the rebar It is.

[0008]

In the above-mentioned means for solving the above problems, a hole for destruction reaching a predetermined reinforcing bar is formed in a concrete portion to expose a part of the reinforcing bar, and the exposed portion of the reinforcing bar is used as one electrode to place the reinforcing bar on one side of the condenser. At the same time, a thin metal wire is connected to the exposed part of the reinforcing bar, and this thin metal wire is connected to the other side of the capacitor via the other electrode. By discharging and supplying energy in a short time, the thin metal wires are rapidly melted and evaporated to vaporize the destruction material, and the impact force at that time destroys the concrete part of the reinforced concrete structure, exposing more rebar, After that, since the reinforcing bars are cut, they are also used in high places where mechanical means cannot be carried in, underground foundations, or in narrow work areas. Corresponding at the time of dismantling is improved.

In addition, a thin metal wire is inserted from a crack generated in a previously destroyed concrete portion of the reinforced concrete structure and reaching the reinforcing bar and connected to the reinforcing bar, and the connecting portion of the thin metal wire is connected to one electrode. The rebar is connected to one side of the capacitor, and a thin metal wire is connected to the other side of the capacitor via the other electrode.Fractures in the concrete part are filled with a destructive substance to reduce the electric energy charged and stored in the capacitor. By supplying electric discharge in a short time, the thin metal wire is rapidly melted and evaporated to vaporize the destructive substance, and the impact force at that time increases the cracks in the concrete part, exposing the rebar, and then cutting the rebar. In addition, the drilling operation for exposing the reinforcing bar is not particularly required, and the labor for drilling is omitted, and the work efficiency for dismantling the structure is improved.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the disassembly method of the present invention will be described below with reference to the drawings. First, the first embodiment of the present invention will be described with reference to FIGS.
It will be described based on.

In the first embodiment of the present invention, the reinforcing bar 2 is exposed by destroying the concrete portion 1 of the structure 3 in advance, and then the structure 3 is dismantled by cutting the exposed reinforcing bar 2. The concrete part 1
When destruction is performed, impact energy due to discharge is used.

First, a breaking hole 4 is drilled in the concrete portion 1 to reach a predetermined reinforcing bar 2, a part of the reinforcing bar 2 is exposed, and an exposed portion of the reinforcing bar 2 is used as one electrode 5, and this one electrode 5 is used. 5 is connected to a thin metal wire (for example, made of Cu, Al, etc.) 6, and one electrode 5 is connected through the thin metal wire 6.
Is connected to the other electrode (made of, for example, Cu), and water (an example of a substance for destruction) 8 is filled in the destruction hole 4.

An energy supply circuit 9 for applying impact energy due to electric discharge to the concrete portion 1 is connected between the other electrode 2 and the other portion 2a on the reinforcing bar 2 other than the one electrode 5. .

As shown in FIG. 1, the energy supply circuit 9 includes a power supply 10 connected between the electrodes 5 and 7, and a capacitor connected in parallel between the power supply 10 and the electrodes 5 and 7. An energy storage circuit 13, a control circuit 11 connected in series between the power supply device 10 and the other electrode 7 for controlling the amount of electric energy stored in the power supply device 10, and the control circuit 11 and the other And a discharge switch 12 connected between the electrode 7.

As described above, the breaking hole 4 is formed in the concrete portion 1 of the structure 3 to expose a part of the reinforcing bar 2 to form one electrode 5, and this one electrode 5 is connected to the other electrode via the thin metal wire 6. The electrode 7 is connected and water 8 is filled in the breaking hole 4, and an energy supply circuit 9 is connected between the other electrode 7 and the other part 2 a on the reinforcing bar 2 other than the one electrode 5, The electric energy is charged and stored in the storage circuit 13, and the discharge switch 12 is turned on.
When electric energy is supplied in a short period of time, the thin metal wire 6 melts and evaporates rapidly and the water 8 evaporates, and as shown in FIG. 2, the impact force at that time acts in the direction of expanding the breaking hole 4. The concrete part 1 of the structure 3
Is exposed, and the portion of one electrode 5 which is the exposed portion of the reinforcing bar 2 is destroyed.

When such an operation is performed at a plurality of places (applied to a foundation portion and a high place) of the structure 3, as shown in FIGS. 3 to 5, the reinforcing bars 2 arranged side by side on the structure 3 are arranged. Can be reliably exposed, and each exposed reinforcing bar 2 is cut with a gas or a cutter, and then, for example, the structure 3 is knocked down and the concrete portion of the structure 3 is formed in the same manner as described above. 1 is destroyed from the opposite side, and each rebar 2 is cut in the same manner as described above, and the structure 3 is dismantled by subdividing it, and is removed to a predetermined place by a crane or the like.

The exposed portion of the reinforcing bar 2 which is one of the electrodes 5 is broken to a certain extent when the thin metal wire 6 is melted and evaporated, so that the cutting operation of the reinforcing bar 2 is easy. As described above, according to the first embodiment of the present invention, by supplying electric energy to the thin metal wire 6 connected between the electrodes 5 and 7 in a short time, only the concrete portion 1 is broken and the reinforcing bar 2 is cut. Since the structure 3 is subdivided and dismantled by exposing and cutting the reinforcing bar 2, even the foundation part under the structure 3 can be easily installed without introducing a mechanical means such as an iron ball. Can be destroyed.

In the method using mechanical means, large noises and vibrations continue for a long time. However, such a method in which the structure 3 is destroyed by using the impact energy due to electric discharge as in this embodiment. Since there is no long-term noise or vibration, it can be used in areas where houses are densely packed.

Next, a method of disassembling the structure 3 according to the second embodiment of the present invention will be described with reference to FIGS. 6 and 7. As shown in FIG. The cracks 15 drilled in the hole 4 are enlarged by using, for example, impact energy due to electric discharge, so that a continuous crack 15 is generated in advance in the hole 4 for breaking, and as shown in FIG. A thin metal wire 6 is inserted from the crack 15 and connected to the reinforcing bar 2, a connection portion of the thin metal wire 6 is used as one electrode 5, and the other electrode 7 is connected to the thin metal wire 6.
An energy supply circuit similar to that of the first embodiment is connected between the other electrode 2 and the other portion 2 a on the reinforcing bar 2 other than the one electrode 5.

Then, water 8 is filled in the enlarged breaking hole 4 and the crack 15 of the concrete portion 1, electric energy is charged and stored in a capacitor of an energy supply circuit, and this is discharged and supplied to the thin metal wire 6 in a short time. Then, the thin metal wire 6 is rapidly melted and evaporated to vaporize the water 8, and the impact force at that time increases the cracks 15 in the concrete portion 1 to expose the reinforcing bar 2, and thereafter, the reinforcing bar 2 is cut.

Thus, according to the second embodiment of the present invention,
Since the concrete portion 1 is destroyed by using the crack 15 generated in the breaking hole 4 expanded in advance and the reinforcing bar 2 is exposed, there is no need to particularly drill a breaking hole for exposing the reinforcing bar 2. Therefore, the labor for drilling can be greatly reduced, and the work efficiency for dismantling the structure 3 can be improved.

In both of the above embodiments, when filling the hole 8 for destruction with the water 8, a plug capable of sealing the water 8 is provided depending on the formation angle of the hole 4 for destruction so that the water 8 does not overflow. It may be.

[0023]

As is apparent from the above description, the present invention provides a method for forming a breaking hole in a concrete portion, connecting a fine metal wire to an exposed portion of a reinforcing bar, filling the breaking hole with a breaking material, and forming a thin metal wire. It melts and evaporates this by discharging electric energy to the concrete, destroying the concrete part by the impact force at that time, exposing more reinforcing steel, cutting the reinforcing steel and dismantling the reinforced concrete structure, It can be used in high places, underground bases, or small work areas where the equipment cannot be carried in. In addition, conventional methods that use mechanical means generate large amounts of noise and vibration, and can take a long time. According to the present invention, such long-term noise and vibration can be suppressed while it is difficult to use on the ground.

In addition, a thin metal wire is inserted from a crack generated in the previously destroyed concrete portion and reaching the reinforcing bar, connected to the reinforcing bar, and electric energy is applied to the thin metal wire.
This causes the cracks to expand due to the impact force when rapidly melting and evaporating, exposing the reinforcing bars and dismantling the reinforced concrete structure, so there is no special need for drilling work to expose the reinforcing bars, and therefore the labor of drilling is reduced. It can be largely omitted, and the work efficiency for dismantling the structure can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a procedure of a breaking method according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged sectional view of the same.

FIG. 3 is a front view of the structure in a state where a concrete part is broken.

FIG. 4 is a view taken along the line XX in FIG. 3;

FIG. 5 is a view taken along the line YY in FIG. 3;

FIG. 6 is a plan view showing a procedure of a breaking method according to a second embodiment of the present invention.

FIG. 7 is a partially enlarged sectional view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete part of structure 2 Reinforcing bar 3 Structure 4 Hole for destruction 5 One electrode 6 Fine metal wire 7 The other electrode 8 Water 9 Energy supply circuit 15 Crack

Claims (2)

(57) [Claims] In a concrete part of a reinforced concrete structure, a hole for breaking reaching a predetermined reinforcing bar is formed to expose a part of the reinforcing bar, and the exposed portion of the reinforcing bar is used as one electrode to connect the reinforcing bar to one side of a condenser. At the same time, a thin metal wire is connected to the exposed part of the reinforcing bar, and this thin metal wire is connected to the other side of the capacitor via the other electrode. By supplying and discharging energy in a short time, the thin metal wire is rapidly melted and evaporated to vaporize the substance for destruction, and the impact force at that time destroys the concrete part of the reinforced concrete structure to expose more rebar, Thereafter, a method of dismantling a reinforced concrete structure, comprising cutting a reinforcing bar. 2. A thin metal wire is inserted from a crack generated in a previously destroyed concrete portion of a reinforced concrete structure and reaching a reinforcing bar and connected to the reinforcing bar, and the connecting portion of the thin metal wire is connected to one electrode. The rebar is connected to one side of the capacitor, and a thin metal wire is connected to the other side of the capacitor via the other electrode.Fractures in the concrete part are filled with a destructive substance to reduce the electric energy charged and stored in the capacitor. By supplying discharge in time,
A reinforced concrete structure characterized by rapidly melting and evaporating thin metal wires to vaporize a substance for destruction, increasing the cracks in the concrete part by the impact force at that time, exposing the rebar, and then cutting the rebar. Demolition method.