JPH10331449A - Destruction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily carry out destruction work of a to-be-destructed object without taking much time by bringing a metal fine conductor into contact with the surface of the object, supplying electric energy to the metal fine conductor to melt and vapor it, and destructing the area from the surface of the object to a reinforced member with the expansion force. SOLUTION: A metal fine conductor 2 is brought into contact with the surface of a to-be-destructed object 8. Electric energy is supplied to within a short period of time, and the metal fine conductor 2 is melted and vapored and is rapidly expanded. Accordingly, destruction from the surface of the destructed object 8 to a reinforced member 10 is made. In that case, a relation between destructible limit distance Rd and the shortest distance D from the surface of the destructed object to the reinforced member 10 is so set that a formula D<Rd is satisfied, and a relation between destructible limit distance Rd and the shortest distance Z from the surface of the destructed object to the reinforcing member 10 is so set that a formula Z<=Rd is satisfied. Accordingly, destruction work of the destructed object can be easily carried out without taking much time.

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 an object to be destroyed such as a concrete structure or a bedrock using electric energy.

[0002]

2. Description of the Related Art Conventionally, a destruction method using electric energy to destroy a destruction object such as a concrete structure or a bedrock is performed by connecting a pair of electrodes connected via a thin metal wire to a capacitor and mounting the electrode on the destruction object. Drill holes at predetermined intervals or at predetermined distances from the surface, inject a destructive substance such as water or oil into these mounting holes, attach electrodes to the mounting holes, and transfer electric energy stored in the capacitor for a short time. In this method, a material for destruction is rapidly vaporized by rapidly discharging and evaporating the thin metal wire by supplying a discharge to the thin metal wire, and the material to be destroyed is broken or weakened by the expansion force at that time.

[0003]

In the above-mentioned conventional breaking method, the mounting hole is formed for mounting the thin metal wire on the object to be destroyed, but the operation of forming the mounting hole in the object to be destroyed is troublesome. Then, the whole destruction work takes time.

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

[0005]

Means for solving the problems of the present invention are as follows. A thin metal wire is brought into contact with the surface of an object to be destroyed, and electric energy is supplied to the thin metal wire in a short time to melt the thin metal wire. By evaporating and expanding rapidly,
When breaking from the surface of the object to be reinforced to the reinforcing member buried at a predetermined depth position, a breakable limit distance Rd when the thin metal wire melts and evaporates, and the shortest distance from the surface of the object to be destroyed to the reinforcing member. The relationship with the distance D is set so as to satisfy the following equation (a): D <Rd (a), and the destructible limit distance Rd;
The relationship with the shortest distance Z from the thin metal wire to the reinforcing member is set so as to satisfy the following equation (b): Z ≦ Rd (b)

According to this, by rapidly expanding the thin metal wire, a crack can be generated from the surface of the object to be smashed to the reinforcing member buried at a predetermined depth position to destroy the object.

Further, a pair of thin metal wires are brought into contact with the surface of the object to be broken at a position sandwiching a reinforcing member buried at a predetermined depth, and electric energy is supplied to these thin metal wires in a short time. By melting and evaporating the metal wire and rapidly expanding it, when breaking from the surface of the object to be destroyed to the reinforcing member, the destructible limit distance Rd1 when one of the metal wires melts and evaporates, and from the metal wire, The relationship with the shortest distance Z1 to the reinforcing member satisfies the following expression (c): Z1 ≦ Rd1 (c), and the breakable limit distance Rd2 when the other thin metal wire melts and evaporates, and the reinforcing member from the thin metal wire The relationship with the shortest distance Z2 satisfies the following formula (d): Z2 ≦ Rd2 (d), the distance X between the fine metal wires, and the destructible limit distance Rd
1, Rd2 and relationship of the shortest distance D from the surface of the debris until the reinforcing member, the following equation (e) ^{X ≦ √ (Rd1 2 -D 2} ) + √ (Rd2 2 -D 2) satisfy (e) Is set to

[0008] According to this, by rapidly expanding each of the thin metal wires, the surface from the surface of the object to be destroyed to the reinforcing member buried at a predetermined depth position is broken so as to be cut in a V-shape. The reinforcing member can be exposed.

In the case where a plurality of reinforcing members are buried side by side at a predetermined depth from the surface of the object to be destroyed,
By arranging and contacting thin metal wires at positions that are sandwiched between reinforcing members on the surface of the object to be broken, electric energy is supplied to these thin metal wires in a short time, and each thin metal wire is melted and evaporated to expand rapidly. When breaking from the surface of the object to be destroyed to the reinforcing member, a breakable limit distance Rd when the thin metal wire melts and evaporates, a distance Z1 from a predetermined thin metal wire to one of the reinforcing members, relationship of the shortest distance D from the surface to the reinforcing member a distance Y1 and the debris along the surface of the debris up reinforcing member, satisfies the following (f) equation ^{Z1 = D 2 + Y1 2 ≦} Rd (f) The relationship between the destructible limit distance Rd, the distance Z2 from the predetermined thin metal wire to the other reinforcing member, the distance Y2 along the surface of the object to be destroyed from the thin metal wire to the other reinforcing member, and the shortest distance D, The following (g) formula Z2 = D ² + Y2 ² ≦ Rd (g)

[0010] According to this, by rapidly expanding each of the thin metal wires, the surface from the surface of the object to be destroyed to the reinforcing member buried at a predetermined depth is broken so as to be cut in a V-shape. The reinforcing member can be exposed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment of the present invention will be described with reference to FIGS. First, a destruction device 1 for performing a destruction method according to the first embodiment of the present invention.
Will be described.

As shown in FIG. 1, this destruction device 1 is sufficiently connected to a thin metal wire (for example, Cu is used) 2 and connected to the thin metal wire 2 via an electrode 4 to melt and evaporate the thin metal wire 2. And an electric energy supply circuit 3 for supplying various electric energy. The electric energy supply circuit 3 includes a power supply device (using a DC power supply) 5 connected between the electrodes 4, and the power supply device 5. A charge control circuit (not shown) for controlling a capacitor 6 connected in parallel with the electrode 4 to accumulate a predetermined amount of electric capacity, and a discharge switch 7 connected between the capacitor 6 and the electrode 4 It is configured.

Next, the destructible area Mf when the destruction device 1 is used will be described. In FIG. 1, the range indicated by the imaginary line is the destructible region Mf, and the propagation direction of the impact force is represented by a plurality of arrows A. The destructible area (volume) Mf is represented by the following equation.

Mf = π · Rd ² · (4/3 · Rd + Lp) where Rd is a breakable limit distance (impact propagation distance),
Lp: metal wire length. The relationship between the energy stored in the capacitor 6 and the destructible limit distance Rd is as shown in the graph of FIG.

Next, a description will be given of a method of destroying the concrete (cover portion) of the reinforced concrete object 8 to be exposed by using the breaking device 1 having the above-described structure so as to expose the reinforcing bar (an example of a reinforcing member) 10. .

For example, in FIG. 3, the thin metal wire 2 connecting the electrodes 4 is made to extend along the surface 9 of the object 8 to be destroyed, and most parts are brought into contact by, for example, being appropriately bent. After the electric energy supply circuit 3 is connected and a predetermined electric capacity is stored in the capacitor 6, the discharge switch 7 is turned on.

Then, a predetermined amount of electric energy is supplied to the fine metal wire 2 in a short time, and this melts and evaporates rapidly, and expands. As shown in FIG.
Then, a crack 11 is generated toward the reinforcing member 10 and can be broken. After that, the concrete is removed to expose the reinforcing member 10, which is cut by another means.

In the above destruction method, the destructible limit distance Rd (cm) when the thin metal wire 2 melts and evaporates,
Is set so that the relationship with the shortest distance D (cm) from the surface 9 to the reinforcing member 10 satisfies the following expression (1) corresponding to the expression (a): D <Rd (1) The possible limit distance Rd,
The relationship with the shortest distance (diagonal distance) Z (cm) from the thin metal wire 2 to the reinforcing member 10 corresponds to the following equation (2) corresponding to the equation (b).
Equation Z ≦ Rd (2)

For example, when D = 4 (cm) and Z = 6 (cm),
From the equations (1) and (2), each value is set so that Rd ≧ 6 (cm). By the way, R in the above equations (1) and (2)
The value of d is determined by the energy W (J) stored in the capacitor 6, the capacitance C (F) of the capacitor, and the charging voltage (V). The relationship between these elements is given by the following equations (3) and (4). Become.

W = １ ／ · C · V ² (3) Rd ≦ (√W) / k (4) In the equation (4), k is an energy / destructible area conversion coefficient. , K = 1.5.

Here, when the capacitor capacity C = 250 (μF) and the charging voltage = 6,000 (V) are substituted into the above equation (3), W = １ ／ · C · V ² = 4,500 (J) . By substituting this into the above equation (4), Rd ≦ (√W) /k≒44.7 (cm). Thus, by setting Rd = 40 (cm), the above equations (1) and (2) can be calculated. To be satisfied.

Then, as a result of an experiment on reinforced concrete with D = 4 (cm), as shown in FIG. 4, a crack 11 was generated between the surface 9 and the reinforcing member 10 and could be broken.

As described above, according to the first embodiment of the present invention, in a state where the thin metal wire 2 is in contact with the surface 9 of the object 8 to be destroyed, electric energy is supplied to the thin metal wire 2 to thereby form the thin metal wire 2. Since the molten material is evaporated and the expansion force at that time breaks from the surface 9 of the object 8 to the reinforcing member 10, there is no need to form a mounting hole for the thin metal wire 2 in the object 8, and the destruction work is performed. Can be performed easily and quickly.

Next, a second embodiment of the present invention will be described with reference to FIGS. The destruction method according to the second embodiment of the present invention uses the destruction device 1 described in the first embodiment.
The thin metal wires 2a and 2b are brought into contact with the surface 9 of the object 8 at a position where the reinforcing member 10 buried at a predetermined depth position is sandwiched between the thin metal wires 2a and 2b. , 2b are supplied in a short period of time to melt and evaporate the metal wires 2a, 2b and rapidly expand them, thereby breaking the object from the surface of the object 8 to the reinforcing member 10 in a V-shaped manner. Things.

At this time, the breakable limit distance Rd1 when one of the thin metal wires 2a melts and evaporates, and the metal thin wire 2a
The relationship with the shortest distance Z1 from to the reinforcing member 10 is
The following formula (5) corresponding to the formula (c) satisfies the following formula: Z1 ≦ Rd1 (5), and a breakable limit distance Rd2 when the other thin metal wire 2b is melted and evaporated, and a reinforcing member from the thin metal wire 2b. The relationship with the shortest distance Z2 up to 10 satisfies the following expression (6) corresponding to the expression (d): Z2 ≦ Rd2 (6), the distance X between the fine metal wires, and the destructible limit distance Rd.
1, Rd2 and relationship of the shortest distance D from the surface of the disrupter 8 to the reinforcing member 10 is, below corresponding to the equation (e) (7) ^{X ≦ √ (Rd1 2 -D 2} ) + √ (Rd2 2 −D ² ) Set each value to satisfy (7).

[0026] However, the Rd1 = Rd2, if Z1 = Z2, the equation (7), written as follows (8) ^{X ≦ 2√ (Rd1 2 -D 2} ) ··· (8) Can be replaced.

According to the above destruction method, for example, D = 4 (cm)
In the case of, according to equations (5) and (6), Z1, Z2 = 6 (cm), R
d1 and Rd2 are set to 7 (cm), and X is set to 10 (cm) from equation (8).

Here, when the capacitor capacity C = 200 (μF) and the charging voltage = 5,000 (V) are substituted into the above equation (3), W = １ ／ · C · V ² = 2,500 (J), From the above equation (4), Rd1, Rd2 ≦ (√W) /k≒33.3 (cm), so that Z1, Z2 = 6 (cm) and Rd1, Rd2 = 7.
(cm) and X = 10 (cm), the above (5),
Equations (6) and (8) are satisfied.

Then, each value is set as described above, and D
As a result of an experiment performed on reinforced concrete of = 4 (cm), as shown in FIG. 6, it was possible to break the object 8 from the surface of the object 8 to the reinforcing member 10 in a V-shape. Other functions and effects are the same as those of the first embodiment.

In the second embodiment, Z1 = Z
2 and Rd1 = Rd2 for destruction. However, the present invention is not limited to this, and Z1 ≠ Z2 depending on the case.
Rd1 ≠ Rd2, (5), (6),
If each value is set so as to satisfy the expression (7), similarly, it is possible to destroy the object 8 from the surface of the object 8 to the reinforcing member 10 so as to cut it into a V-shape.

Next, a third embodiment of the present invention will be described with reference to FIGS. 7 and 8. This is because a plurality of reinforcing members 10 are arranged at a predetermined depth from the surface 9 of the object 8 to be destroyed. When buried individually, the thin metal wires 2 are arranged and contacted at positions sandwiched between the reinforcing members on the surface 9 of the object 8 to be destroyed, and electric energy is supplied to the thin metal wires 2 in a short time, and each metal wire is supplied. The thin wire 2 is melted and evaporated and rapidly expanded, thereby breaking the surface of the object 8 to be cut in a continuous V-shape from the surface 9 to the reinforcing member 10 to expose the reinforcing member 10.

At this time, the breakable limit distance Rd when the thin metal wire 2 melts and evaporates, the distance Z1 from the predetermined thin metal wire 2 to one reinforcing member 10a, and the distance Z1 from the thin metal wire 2 to one reinforcing member 10a. The relationship between the distance Y1 along the surface 9 of the destroyed object 8 and the shortest distance D from the surface 9 of the destroyed object 8 to the reinforcing member 10a corresponds to the following equation (9) corresponding to the equation (f).
The formula Z1 = D ² + Y1 ² ≦ Rd (9) is satisfied, the breakable limit distance Rd, the distance Z2 from the predetermined metal thin wire 2 to the other reinforcing member 10b, the distance Z2 from the metal thin wire 2 to the other reinforcing member 10b. Surface 9 of object 8 to be destroyed
Is set so that the relationship between the distance Y2 along the distance and the shortest distance D satisfies the following equation (10) corresponding to the equation (g): Z2 = D ² + Y2 ² ≦ Rd (10)

According to the above destruction method, for example, D = 4 (cm)
In the case of, Y1, Y2 = 3 (cm), Z1, Z2 = 25 (cm),
It is set so that Rd = 30 (cm). Here, when the capacitor capacity C = 200 (μF) and the charging voltage = 5,000 (V) are substituted into the above equation (3), W = １ ／ · C · V ² = 2,500 (J), and the above (4) From the formula, since Rd ≦ (√W) /k≒33.3 (cm), Y1, Y2 = 3 (cm), Z1, Z2 = 25 (c)
m) and Rd = 30 (cm), whereby the above (9),
Satisfies the expression (10).

Then, by setting each value as described above, D
= 4 (cm) reinforced concrete, each reinforcing member 10
As a result of an experiment in which the thin metal wire 2 was placed on the surface 9 of the object 8 to be destroyed, as shown in FIG.
To the reinforcing member 10 could be broken so as to be cut into a continuous V-shape. Other functions and effects are the same as those of the first embodiment.

In the third embodiment, Y1
= Y2, Z1 = Z2, but the present invention is not limited to this. As shown in FIG. 8, even when Y1 ≠ Y2 and Z1 ≠ Z2, the above equations (9) and (10) are used. By setting the destructible limit distance Rd so as to satisfy both of the above, the object 8 to be destroyed can be destroyed so as to be cut into a continuous V-shape.

Further, in each of the above embodiments, the thin metal wire 2 (2a, 2b) is simply brought into contact with the surface 9 of the object 8 to be broken, but the present invention is not limited to this. 2 may be pressed against the surface 9 by a separately provided pressing member (not shown), and electrical energy may be supplied to the fine metal wire 2 in this state. In this case, too, the mounting hole for mounting the fine metal wire 2 is provided. The object to be destroyed 8 can be destroyed without being formed on the surface of the object to be destroyed 8, and the destruction work can be performed efficiently.

Further, the pressing member and the surface 9 of the object 8 to be destroyed
In this case, the object to be destroyed 8 may be destroyed by filling it with a destructive substance (for example, water or the like) in which the thin metal wire 2 melts and evaporates and vaporizes and expands. The expansion force when the substance evaporates acts on the surface,
In combination with the expansion force of the thin metal wire 2, the object 8
Can be destroyed.

[0038]

As is apparent from the above description, according to the present invention, a thin metal wire is brought into contact with the surface of an object to be destroyed, electric energy is supplied to the thin metal wire, and the thin metal wire is melted and evaporated. Since the portion from the surface of the broken object to the reinforcing member is broken or exposed, there is no need to form a mounting hole for mounting a thin metal wire on the surface of the broken object as in the conventional case. The destruction work of the object to be destroyed can be performed without applying any force.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state in which a thin metal wire of a breaking device according to a first embodiment of the present invention is in contact with a surface of an object to be broken.

FIG. 2 is a graph showing a relationship between energy stored in a capacitor and a destructible limit distance.

FIG. 3 is a front view showing a state in which a thin metal wire is brought into contact with the surface of an object to be destroyed.

FIG. 4 is a front view showing the state of the object to be destroyed after the fracture.

FIG. 5 is a front view of a state in which a thin metal wire is brought into contact with a surface of an object to be destroyed in a breaking method according to a second embodiment of the present invention.

FIG. 6 is a front view showing the state of the object to be destroyed after the fracture.

FIG. 7 is a front view showing an installation state of a thin metal wire in a breaking method according to a third embodiment of the present invention.

FIG. 8 is an enlarged front view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Destruction device 2 Metal wire 3 Electric energy supply circuit 8 Destruction object 9 Surface of destruction object 10 Reinforcement member 11 Crack Mf Destructible area Rd Destructible limit distance

Claims (3)

[Claims] 1. A thin metal wire is brought into contact with the surface of the object to be destroyed,
A destruction method that supplies electric energy to the metal wire in a short time, melts and evaporates the metal wire and rapidly expands the metal wire, thereby breaking from the surface of the object to be smashed to the reinforcing member buried at a predetermined depth position. The relationship between the breakable limit distance Rd when the thin metal wire melts and evaporates and the shortest distance D from the surface of the object to be destroyed to the reinforcing member satisfies the following equation (a): D <Rd (a) And destructible limit distance Rd,
A destruction method characterized in that the relationship with the shortest distance Z from the thin metal wire to the reinforcing member satisfies the following equation (b): Z ≦ Rd (b) 2. A thin metal wire is brought into contact with a surface of the object to be broken at a position sandwiching a reinforcing member buried at a predetermined depth, and electric energy is supplied to the thin metal wire in a short time. This is a destruction method in which the thin metal wire is melted and vaporized and rapidly expanded, thereby breaking from the surface of the object to be destroyed to the reinforcing member. The relationship between the shortest distance Z1 from the thin metal wire to the reinforcing member satisfies the following formula (c): Z1 ≦ Rd1 (c), and the breakable limit distance Rd2 when the other thin metal wire melts and evaporates, and the thin metal wire. , The relationship with the shortest distance Z2 to the reinforcing member satisfies the following equation (d): Z2 ≦ Rd2 (d), the distance X between the thin metal wires, and the breakable limit distance Rd
1, Rd2 and relationship of the shortest distance D from the surface of the debris until the reinforcing member, the following equation (e) ^{X ≦ √ (Rd1 2 -D 2} ) + √ (Rd2 2 -D 2) satisfy (e) A destruction method characterized by being set to be performed. 3. When a plurality of reinforcing members are buried side by side at a predetermined depth from the surface of the object to be destroyed, a thin metal wire is placed at a position sandwiched between the reinforcing members on the surface of the object to be destroyed. A method of breaking down from the surface of the object to be reinforced to the reinforcing member by supplying electric energy to these metal wires in a short time, melting and evaporating each metal wire and rapidly expanding the metal wires, The breakable limit distance Rd when the thin metal wire melts and evaporates, the distance Z1 from the predetermined thin metal wire to one of the reinforcing members, the distance Y1 along the surface of the object to be broken from the thin metal wire to the one of the reinforcing members, and relationship of the shortest distance D from the surface of the debris to the reinforcing member, and satisfies the following (f) equation ^{Z1 = D 2 + Y1 2 ≦} Rd (f), the reinforcing breakable limit distance Rd, a predetermined thin metal wire other Distance Z2 to member , Set to the relationship between the distance Y2 and the shortest distance D along the surface of the debris from the thin metal wires to the other reinforcing member, satisfies the following (g) formula ^{Z2 = D 2 + Y2 2 ≦} Rd (g) Destruction method characterized by doing.