JP3297239B2 - 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 of dismantling 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 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. In such a case, the structure is dismantled manually using a wire saw or the like, but this is a difficult operation.

Therefore, an object of the present invention is to provide a method for dismantling a concrete structure capable of solving the above-mentioned problems.

[0006]

In order to achieve the object of the present invention , a reinforced concrete structure according to claim 1 is provided.
Demolition method is concrete part of reinforced concrete structure
At a given angle of inclination to the concrete surface
Is located near the rebar to be exposed
Bored mounting holes as in the mounting hole, fitted with destruction container filled with disruption solution with seals enter the thin metal wire connected between a pair of electrodes and the electrodes therein, the breaking container
The electric energy previously charged and stored in the capacitor is discharged and supplied in a short period of time to the thin metal wire, which rapidly melts and evaporates the thin metal wire to vaporize the liquid for destruction. The part is destroyed to expose the reinforcing bar, and then the reinforcing bar is cut.

A reinforced concrete structure according to claim 2
The method for dismantling a structure is a reinforced concrete structure according to claim 1.
In the dismantling method, the concrete
The tip of the mounting hole drilled in the cleat part is
It is located in a deep place.

[0008]

In the above configuration, the reinforced concrete structure
In the concrete part,
At the angle of inclination and the tip is
Drill a mounting hole so that it is located near the
When supplying electrical energy to the fine metal wire to be mounted, disruption solution is vaporized with metal thin wires melts evaporated, concrete unit content destruction of the structure with the impact force, iron objects
Since the perimeter of the streak is reliably exposed, it is cut off, and such work is performed where necessary, and destruction work is also performed on the foundation of the structure to facilitate dismantling of the structure .

[0009]

[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, a partially broken front view of the breaking container of FIG.
Description will be made based on an overall view showing an example of dismantling of the structure in FIG. 3, a perspective view of the structure subdivided by the dismantling work in FIG. 4, and a perspective view showing a broken state of the concrete portion in FIG.

As shown in FIG. 1, a destruction apparatus 1 for carrying out a disassembly method according to an embodiment of the present invention includes a destruction container 2 made of plastic rubber or waterproof paper, in which a destruction liquid 3 (for example, water) is filled. A pair of electrode rods 4 and 4 (for example, made of Cu) are inserted into the top plate 2a of the destruction container 2 through the through-hole 2b.
1 (or caulking), immersed in the breaking liquid 3 and sealed in the breaking container 2.

The two electrode rods 4, 4 are held in the middle thereof by holding members 7, 7 for holding the electrode rods 4, 4 in parallel. 8 (for example, made of Cu and Al) is attached by welding or caulking.

The portions of the electrode rods 4, 4 projecting from the top plate 2a are defined as terminals 5, 5, and a terminal cover 6 for preventing the terminals 5, 5 from forming an insulating film on the top plate 2a. Is attached.

As shown in FIG. 2, an energy supply circuit 9 for supplying electric energy to the thin metal wires 8 is provided. The energy supply circuit 9 comprises a power supply device 10 connected to the terminal 5 and a power supply Device 10 and one terminal 5,
5, a control circuit 11 for controlling the amount of electric energy stored in the power supply device 10 connected in series with the power supply device 10, a discharge switch 12 connected between the control circuit 11 and one terminal 5, An energy storage circuit 13 including a capacitor is connected in parallel between the power supply device 10 and both terminals 5 and 5.

Next, a disassembly method for dismantling the structure H using the destruction device 1 will be described. First, a mounting hole for mounting the destruction container 1 in the structure H is drilled in a predetermined direction and near the center of the portion to be destroyed, and the destruction container 1 is mounted in the mounting hole.

The above-mentioned energy supply circuit 9 is connected to the terminals 5 and 5, and the predetermined electric energy which the concrete portion C of the structure H destroys is stored in the energy storage circuit 13
By turning on the discharge switch 12, electric energy is supplied to the thin metal wires 8 in a short time.

Then, the thin metal wire 8 melts and evaporates, and at the same time, the breaking liquid 3 evaporates, and the impact force breaks a predetermined portion of the concrete portion C of the structure H, as shown in FIG.
Since all the reinforcing bars A in a predetermined section are exposed, this is cut with a gas or a cutter.

Then, such a work is performed at a necessary place, and a destruction work is similarly performed on the foundation portion of the structure H to disassemble the structure H by subdividing it. Remove in place.

Also, for example, even if a mounting hole is formed in the middle of the structure H in the horizontal direction, the breaking liquid 2 is already filled in the breaking container 2 of the breaking device 1, so that the breaking liquid 3 is mounted. There is no spilling out of the hole, and the direction of the mounting hole drilled in the structure H can be any direction.

In the case of a prism having a side length of 40 cm, the breaking container 2 having the above structure is buried in three predetermined places, an electric capacity of 500 μF is stored in each energy storage circuit 13, and a voltage of 4000 V is applied to each metal wire 8. The rebar A was exposed by applying the voltage at the same time.

In the case of flooring having a thickness of 20 cm,
Similarly, the destruction container 2 having the above structure is buried in predetermined three places,
By storing an electric capacity of 500 μF in each energy storage circuit 13 and simultaneously applying a voltage of 3500 V to each thin metal wire 8, the concrete portion C of the floor material penetrated and the reinforcing bar A was exposed.

Thus, according to the first embodiment of the present invention,
By supplying electric energy to the thin metal wire 8 in a short time, only the concrete portion C is destroyed to expose the reinforcing bar A, and the reinforcing bar A is cut and the structure H is divided and dismantled. It is not necessary to introduce a mechanical means such as an iron ball even in the foundation part under the structure H, and it is possible to improve the responsiveness to the dismantling part and to easily break even a thick pillar. The structure can be dismantled.

Next, a disassembly method according to a second embodiment of the present invention will be described with reference to a perspective view showing a broken state of FIG. In this mounting hole, the breaking container 2 having the same structure as in the first embodiment is mounted, and electric energy is supplied to the thin metal wire 8 in a short time to melt and evaporate the thin metal wire 8. Then, the breaking liquid 3 is vaporized, the concrete portion C of the structure H is broken from the outside of the reinforcing bar A by the impact force, and the exposed reinforcing bar A is cut in the same manner as in the first embodiment. The structure H is dismantled by breaking the concrete portion C with the above-described breaking device.

According to the second embodiment of the present invention, since the concrete portion C is broken from the outside of the reinforcing bar A, the restraining force by the reinforcing bar A is small. Even if it is smaller than the example, the concrete portion C can be broken.

In the same manner as in the first embodiment, by supplying electric energy to the thin metal wire 8 in a short time, only the concrete portion C was broken to expose the reinforcing bar A, and the reinforcing bar A was cut. Thereafter, the remaining (central) concrete portion C is broken by the breaking device 1. Since the structure H is subdivided and dismantled in this manner, the structure H
Even if it is a foundation part underground or a thick pillar, the structure H can be easily destroyed and the structure H can be dismantled.

In each of the above-described embodiments, when the structure H is dismantled, the breaking container 2 is buried by making a mounting hole in the concrete portion C. However, the present invention is not limited to this.
As shown in FIG. 7, when constructing the structure H, the breaking container 2 may be buried in a predetermined portion of the concrete portion C in advance.

In this case, the ends of the terminals 5 and 5 are led out to the surface of the structure H by the electric wire 14 and attached to a terminal block 15 made of an insulating material.
And the terminal block 15 is covered with a terminal cover 16. When the structure H is destroyed, the energy supply circuit 9 is connected to the terminals 5 and 5 as in the above embodiment, a predetermined amount of electric energy is stored in the energy storage circuit 13, and the discharge switch 12 is turned on. Supplying electric energy to the thin metal wire 8 in a short time to melt and evaporate the thin metal wire 8 to vaporize the breaking liquid 3;
The structure H is destroyed and dismantled by the impact force.

According to this embodiment, the destruction container 2 does not explode unless electric energy is supplied. Therefore, even if the destruction container 2 is buried in the structure H in advance, the vibration of the structure H like dynamite does not occur. There is no fear of explosion due to the above, and it is safe. Further, by embedding the destruction container 2 in the structure H in advance, it is possible to omit a process for installing the apparatus such as drilling a mounting hole in the structure H.

Next, a method of dismantling the structure H in the third embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 8, a mounting hole 30 is formed in a concrete portion C of a structure H at a predetermined inclination angle (for example, 60 °) θ with respect to the concrete surface. The concrete part C is destroyed by mounting.

The mounting hole 30 drilled in the concrete portion C is provided so that its tip is located near the reinforcing bar A to be exposed and at a position slightly deeper than the reinforcing bar A. Of the destruction container 2 to the innermost part of the wire, and in the same manner as in the above embodiment, electric energy is supplied to the thin metal wire 8 in a short time to melt and evaporate the thin metal wire 8 to vaporize the liquid for destruction 3. The concrete portion C of the structure H is destroyed by the impact force.

When such an operation is performed at a plurality of locations, as shown in FIGS. 9 to 12, only the concrete portion C substantially surrounding the reinforcing bar A to be exposed is destroyed. As in the example, the exposed rebar A is cut by a gas or cutter, an electric saw for cutting metal, etc., and then, for example, the structure H is turned down and the same method as described above or a conventional machine is used. The structure H is destroyed from the opposite side by using an appropriate means, and the entire structure H is dismantled.

Thus, according to the third embodiment of the present invention,
The mounting hole 30 for mounting the breaking container 2 is inclined at a predetermined inclination angle θ with respect to the concrete surface so that the tip of the mounting hole 30 is located near the reinforcing bar A and slightly deeper than the reinforcing bar A. With the provision, the target rebar A can be reliably exposed without supplying unnecessarily large electric energy to the thin metal wires 8, and the rebar A can be easily cut.

Next, the disassembling method according to the fourth embodiment of the present invention will be described with reference to FIGS. 13 and 14. As shown in FIG. A pair of mounting holes 30 having the opposite inclination angle θ with respect to, the tip of each mounting hole 30 is provided near the reinforcing bar A and at a position slightly deeper than the reinforcing bar A, As in the third embodiment, the breaking container 2 is mounted in each mounting hole 30 to the innermost portion, and electric energy is supplied to the thin metal wire 8 in a short time, so that the structure H
Is to destroy the concrete portion C.

According to the fourth embodiment of the present invention, since the fractured cross section of the concrete portion C is substantially V-shaped as shown in FIG. 14, the exposed portion of the reinforcing bar A is further enlarged, and Therefore, the work of cutting the reinforcing bar A can be performed extremely easily.

[0035]

As is apparent from the above description, the breaking container is mounted on the structure, the predetermined electric energy is stored in the condenser, and the electric energy is supplied to the thin metal wire in a short time. Is melted and evaporated, and the liquid for destruction evaporates, and the impact force breaks a predetermined part of the concrete part of the structure, exposing the rebar, and cutting it to dismantle the concrete structure, so it is located underground Even in the case of dismantling the base part, it can be easily dismantled by performing the destruction work in the same manner, and it is not necessary to introduce a mechanical means such as an iron ball as in the conventional case. Correspondence to the dismantling location can be improved.

Further, after the concrete portion is broken by the impact force when the thin metal wire melts and evaporates and the breaking liquid is vaporized,
Since the exposed rebar is cut, even a thick pillar can be easily dismantled.

Further, a mounting hole is drilled at a predetermined inclination angle with respect to the concrete surface and the tip is located near the reinforcing bar to be exposed, and a breaking container is mounted on the mounting hole. As a result, the periphery of the target reinforcing bar can be reliably exposed without supplying unnecessarily large electric energy to the thin metal wire, and the cutting operation of the reinforcing bar can be made extremely easy, and the reinforced concrete structure easily line Ukoto the dismantling of things
And the tip of the mounting hole drilled in the concrete part
Position slightly deeper than the rebar.
And more surely expose the area around the target rebar
Can be.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a destruction container for performing a disassembly method according to a first embodiment of the present invention.

FIG. 2 is an overall configuration diagram of the destruction device.

FIG. 3 is an overall view showing an example of dismantling a structure.

FIG. 4 is a perspective view of a structure subdivided by the dismantling operation.

FIG. 5 is a perspective view showing a broken state of a concrete part.

FIG. 6 is a perspective view showing a broken state of a concrete portion by a dismantling method according to a second embodiment of the present invention.

FIG. 7 is a sectional view of a concrete structure showing another embodiment of the breaking device.

FIG. 8 is a cross-sectional view before destruction of a structure in a disassembly method according to a third embodiment of the present invention.

FIG. 9 is a cross-sectional view of the same structure after destruction.

FIG. 10 is a front view of the structure after the structure is broken.

11 is a sectional view taken along line XX in FIG.

12 is a sectional view taken along line YY in FIG.

FIG. 13 is a sectional view of a structure before destruction in a disassembly method according to a fourth embodiment of the present invention.

FIG. 14 is a sectional view of the same structure after the structure is broken.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Destruction device 2 Destruction container 3 Destruction liquid 4 Electrode rod 5 Terminal 8 Metal wire 9 Energy supply circuit 10 Power supply device 11 Control circuit 12 Discharge switch 13 Energy storage circuit 15 Terminal block 30 Mounting hole A Reinforcing bar H Concrete structure C Concrete part

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tetsuya Inoue 3-28, Nishikujo, Konohana-ku, Osaka-shi, Osaka Inside Hitachi Zosen Corporation (72) Inventor Hidehiko Maehata 5-cho, Nishikujo, Konohana-ku, Osaka-shi, Osaka No. 3 No. 28 within Hitachi Zosen Corporation (56) References JP-A-55-78765 (JP, A) JP-A-63-221857 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB (Name) E04G 23/08

Claims (2)

(57) [Claims] 1. A concrete of a reinforced concrete structure.
In the part, at a predetermined inclination angle with respect to the concrete surface,
And the tip is located near the rebar to be exposed.
So that the bored mounting holes, in this mounting hole, filled with disruption solution with seals enter the thin metal wire connected between a pair of electrodes and the electrodes therein
Attach the destruction container and discharge the electrical energy pre-charged and stored in the capacitor to the thin metal wire of this destruction container in a short time to rapidly melt and evaporate the thin metal wire to vaporize the liquid for destruction. A method of dismantling a reinforced concrete structure, comprising: destructing a concrete portion of the reinforced concrete structure with an impact force of the steel, exposing the reinforcing steel, and thereafter cutting the reinforcing steel. 2. Concrete of a reinforced concrete structure.
The tip of the mounting hole is slightly deeper than the rebar.
The method for dismantling a reinforced concrete structure according to claim 1, wherein the reinforced concrete structure is located at a location where the reinforced concrete structure is located .