JP3197181B2 - 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 dismantling a reinforced concrete structure using energy generated by 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 a structure, for example, there is a method in which the structure is broken using 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 A means for solving the problem of the present invention is to form a hole in a concrete part of a reinforced concrete structure by piercing a breaking hole reaching a predetermined reinforcing bar to expose a part of the reinforcing bar. The exposed portion of the reinforcing bar is used as one electrode, the other electrode is inserted into the hole for destruction, and it is made to oppose near one electrode, and the hole for destruction is filled with a conductive liquid, and a voltage is repeatedly applied between both electrodes. Is to melt the rebar by discharging.

Further, the width of the other electrode to be inserted into the breaking hole formed in the concrete portion is made larger than the diameter of the reinforcing bar to melt the reinforcing bar.

[0008]

In the above-mentioned means for solving the above problems, in the concrete portion of the 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, Insert the other electrode with a width larger than the diameter of the rebar into the hole and make it oppose near one electrode, fill the breaking hole with conductive liquid, and adjust the voltage value applied between both electrodes. The discharge is repeated between the two electrodes to melt and vaporize the reinforcing bar.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the disassembly method of the present invention will be described below with reference to a sectional view of a reinforcing bar shown in FIG. 1 before melting and a sectional view of a reinforcing bar shown in FIGS. By drilling a breaking hole 4 in the concrete part 1
Is exposed, and then the exposed reinforcing bar 2 is melted and vaporized to disassemble the structure 3.

That is, as shown in FIG. 1, a hole 4 for breaking is made in the concrete portion 1 to reach a predetermined reinforcing bar 2, and a part of the reinforcing bar 2 is exposed. The electrode (positive electrode) 5 is used, and the other electrode (for example, made of Cu and used as a negative electrode) 7 having a width larger than the diameter of the reinforcing bar 2 is inserted into the breaking hole 4 so as to be opposed to the one electrode 5 in the vicinity. The hole 4 for breaking is filled with water (an example of a conductive liquid) 8, and the other portion 2 a on the reinforcing bar 2 other than the one electrode 5.
By applying a voltage between the first and second electrodes 7 and 7, discharge is performed between the two electrodes 5 and 7.

Then, as shown in FIG. 2, a discharge column 10 is generated between the electrodes 5 and 7, whereby the exposed portion of the reinforcing bar 2 is melted 11 and vaporization 12 is started. When a discharge occurs between the electrodes 5 and 7, an impact pressure P is generated by the discharge, and the concrete 13 covering the exposed portion side of the reinforcing bar 2 is broken by the impact, and the exposed area of the reinforcing bar 2 is increased.

Subsequently, by repeatedly applying a voltage between the electrodes 5 and 7, the rebar 2 is sequentially melted 11 and vaporized 12 as shown in FIGS.
The concrete 13 covering the exposed portion side of the reinforcing bar 2 is gradually destroyed, and the exposed area of the reinforcing bar 2 is further increased, so that the reinforcing bar 2 has a thickness that can be easily cut by cutting means such as gas or pliers. A repetitive voltage is applied between the electrodes 5 and 7 until the rebar 2 melts 11 and evaporates 12.

After such work is performed at a plurality of locations of the structure 3 and the reinforcing bars 2 are cut, the remaining concrete portion 1 is broken by, for example, crushing or the like, and the entire structure 3 is dismantled. To

As described above, according to the embodiment of the present invention, a part of the reinforcing bar 2 is exposed by piercing the concrete portion 1 with the breaking hole 4 reaching the predetermined reinforcing bar 2. As one electrode 5, another electrode 7 having a width larger than the diameter of the reinforcing bar 2 is inserted into the breaking hole 4 and is opposed to the one electrode 5 in the vicinity thereof to fill the breaking hole 4 with water 8, The rebar 2 is melted and vaporized by repeatedly applying a voltage between the electrodes 5 and 7 until the concrete 2 has a thickness that can be easily cut, and the concrete 13 covering the periphery of the rebar 2 by the impact of discharge energy is sequentially applied. Since the structure 3 is dismantled by destroying and cutting the reinforcing bar 2 and then the remaining concrete part 1, if dismantling is performed entirely by using mechanical means, loud noise and vibration will continue for a long time. On the other hand, adjust the discharge energy. By, it is possible to suppress the noise and vibration during demolition, it is possible to cope in areas where housing is dense.

In addition, even in the case of a base part or a high place under the structure 3 where a mechanical means such as an iron ball cannot be introduced, the rebar 2 can be broken and the structure 3 can be dismantled. it can.

In the above embodiment, a stopper capable of sealing the water 8 is provided depending on the formation angle of the breaking hole 4 so that the water 8 does not overflow when the breaking hole 4 is filled with the water 8. You may.

Further, in the above-described embodiment, a voltage is applied between the electrodes 5 and 7 until the reinforcing bar 2 has a thickness that can be easily cut by a cutting means such as gas or pliers, and the cutting is performed by the cutting means. Is not limited to this.
May be repeatedly applied between the electrodes 5 and 7 until is completely cut, and then the remaining concrete portion 1 may be broken to dismantle the structure 3.

[0018]

As is apparent from the above description, the present invention is to provide a concrete part of a reinforced concrete structure with a hole for breaking reaching a predetermined reinforcing bar, thereby exposing a part of the reinforcing bar and exposing the exposed portion of the reinforcing bar. Is used as one electrode, and the other electrode is inserted into the hole for destruction so as to face the vicinity of one electrode, and the hole for destruction is filled with a conductive liquid. Is melted and the reinforced concrete structure is dismantled, so it can be used in high places, underground foundations or small work places where mechanical means can not be carried in, and using conventional mechanical means With the method, noise and vibration are loud and it is long, so it is difficult to use it in dense residential areas,
According to the present invention, such noise and vibration can be suppressed by adjusting the voltage applied to both electrodes, and therefore, it is possible to cope with densely populated areas.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which both electrodes face each other in a disassembly method according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a state in which the rebar has begun to melt and evaporate.

FIG. 3 is a cross-sectional view showing a state in which the rebar is melted and vaporized.

FIG. 4 is a cross-sectional view showing a state in which the rebar is melted and vaporized.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete part of structure 2 Rebar 3 Structure 4 Breaking hole 5 One electrode 7 The other electrode 8 Water 10 Discharge pole 13 Concrete P Impact pressure

Claims (2)

(57) [Claims] In a concrete part of a reinforced concrete structure, a hole for breaking reaching a predetermined reinforcing bar is drilled to expose a part of the reinforcing bar, and the exposed portion of the reinforcing bar is used as one electrode, and the other hole is connected to the breaking hole. Insert an electrode and face it in the vicinity of one electrode and fill the breaking hole with conductive liquid,
A method for dismantling a reinforced concrete structure, characterized in that a reinforcing bar is melted by repeatedly applying a voltage between both electrodes and discharging. 2. The disassembly of a reinforced concrete structure according to claim 1, wherein the width of the other electrode to be inserted into the breaking hole formed in the concrete portion is larger than the diameter of the reinforcing bar to melt the reinforcing bar. Method.