JPH10115172A - Underground excavator by electrical crushing method and excavator and excavation method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underground excavator by an electrical crushing method provided with a mechanism which surely holds a solution around an electrode for electrical crushing and an excavator. SOLUTION: The underground excavator includes an electrode for electrical crushing provided in front of an excavator, a pulse generator 10 for applying high voltage pulses to the electrode, a solution 9 provided around the electrode, a water holding cover 14 provided over the outer periphery of the excavator to hold the solution around the electrode between the front surface of the excavator and the ground surface, a solution feed pipe 7 for feeding the solution to the periphery of the electrode, a pump 6 for feeding the solution to the front side of the excavator via the pipe 7, and a storage tank 5 for storing the solution. The excavator includes a lower running body, a car body on the running body, a work machine arm at an end of the car body, and an excavating part at a forward end of the arm. There are provided at least a pair of electrodes for electrical crushing provided at the front side of the excavating part, the pulse generator 10, the solution 9 around the electrodes, a case provided around the electrodes to hold the solution 9, the feed pipe 7, the pump 6, and the tank 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground excavator by electric crushing, and an excavator and an digging method thereof, which are capable of efficiently retaining water around an electrode for electric crushing by pulse electric energy discharge and excavating.

[0002]

2. Description of the Related Art Conventionally, rock and concrete are crushed by electric energy discharge (hereinafter referred to as electro-crushing).
Several methods have been proposed. For example, JP-A-4-
In Japanese Patent No. 222794, a hole is formed in a solid insulator such as rock by a drill or the like, and a viscous electrolytic solution (for example, copper sulfate electrolytic solution) is put in the hole, and the hole is coaxially inserted into the hole. A high voltage pulse is applied to this electrode. As a result, a plasma discharge is generated in the electrode, and the electric energy radiated at this time crushes the rock and fragments it. Then, the inside of the confined area around the electrode is filled with the electrolytic solution to increase the destructive force generated by the plasma discharge. Further, the rising time of the high voltage pulse is reduced to a predetermined value or less, so that the discharge current easily flows through the solid insulator.

[0003]

In the above-described conventional electro-crushing, it is important to keep the electrolyte in a confined area around the electrode in order to increase the crushing energy. To this end, it is also disclosed to combine the electrolyte with a gelling agent such as bentonite or gelatin to provide sufficient viscosity so that the electrolyte does not escape. Therefore, when a vertical hole is excavated and crushed in a state where the hole is filled with the electrolyte, it is possible to hold the electrolyte by supplementing the amount of liquid penetrating into the substance to some extent. . However, there is no disclosure of a method for holding the electrolyte in the hole in the lateral direction, and it is difficult to hold the electrolyte using the conventional method.

However, in applying the above-mentioned electric crushing technology to a machine for crushing or excavating rock or concrete, crushing or excavation using the above-described lateral hole is very difficult in order to widen the applicable range. This is an important function. Therefore, there is a strong demand for the development of a technique for efficiently holding a solution such as the electrolytic solution.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has been developed in consideration of the above-described problem. An object of the present invention is to provide an excavator, an excavator, and an excavation method thereof.

[0006]

Means for Solving the Problems, Action and Effect In order to achieve the above object, an invention according to claim 1 is an underground excavator, wherein at least one underground excavator is provided on the front surface of the excavator.
A pair of electrodes 1 for electrocrushing, a pulse generator 10 for applying a high-voltage pulse to the electrodes 1, a solution 9 filled around the electrodes 1, and an electrode provided on an outer peripheral surface of an excavator. Via a water retaining cover 14 for retaining the solution 9 around the space 1 between the front surface of the machine and the ground, a solution supply pipe 7 for supplying the solution 9 around the electrode 1, and a solution supply pipe 7 And a pump 6 for supplying a solution 9 to the front of the excavator.
And a storage tank 5 in which the solution 9 is sucked up by the pump 6. The electrode 1 is discharged by a high-voltage pulse to excavate underground.

According to the first aspect of the present invention, the solution in the storage tank is sucked up by the pump, and is supplied at a predetermined pressure to the periphery of the front electrode through the solution supply pipe. This solution is prevented from flowing out by a water retention cover provided on the outer peripheral surface of the underground excavator. Accordingly, the solution around the electrode is slightly pressurized and is kept water, so that the discharge energy at the electrode is efficiently used for excavation. If a highly viscous solution is used, the leakage of the solution is further reduced, and the water retention effect is increased.

According to a second aspect of the present invention, in an underground excavator, at least one pair of electrodes 1 for electric crushing provided on the front surface of the excavator and a pulse generator for applying a high-voltage pulse to the electrode 1. An apparatus 10, a solution 9 filled around the electrode 1, a case 19 provided around the electrode 1, and holding the solution 9 around the electrode 1 between the front of the excavator and the ground, A solution feed pipe 7 for feeding the solution 9 around the electrode 1, a pump 6 for feeding the solution 9 to the front of the excavator via the solution feed pipe 7, and a pump for storing the solution 9; 6 is provided with a storage tank 5 capable of sucking up the solution 9, and the electrode 1 is discharged with a high voltage pulse to excavate underground.

According to the second aspect of the present invention, the solution in the storage tank is sucked up by the pump, and is supplied at a predetermined pressure to the periphery of the front electrode through the solution supply pipe. At this time, since the solution around the electrode is kept in water between the ground and the case, the solution can be prevented from flowing out.
Accordingly, the solution around the electrode is slightly pressurized and is kept water, so that the discharge energy at the electrode is efficiently used for excavation. If a highly viscous solution is used, the leakage of the solution is further reduced, and the water retention effect is increased.

[0010] The invention described in claim 3 is the invention according to claim 1 or 2.
Wherein the at least one pair of electrodes 1 comprises an outer peripheral electrode having a shape similar to the shape of a hole to be excavated, and an inner electrode disposed at the center of the outer peripheral electrode. It has a configuration.

According to the third aspect of the present invention, the outer peripheral portion of the underground excavator has a shape similar to the hole to be excavated, and the outer peripheral portion has at least one of a pair of electrodes. Since the electrode is used as the electrode and the other electrode is provided at the center of the electrode, a hole having a desired shape is excavated by electrocrushing. Therefore, efficient underground excavation becomes possible.

[0012] The invention according to claim 4 is the invention according to claim 1 or 2.
In the underground excavator described in (1), a water retention material 18 for retaining the solution 9 is provided so as to fill up the periphery of the electrode 1.

According to the fourth aspect of the present invention, the solution around the electrodes is absorbed and retained by the water retaining material. Therefore, the discharge energy at the electrode is efficiently used for excavation, and efficient underground excavation becomes possible.

According to a fifth aspect of the present invention, in the underground excavator according to the first, second or third aspect, a continuous discharging mechanism for continuously discharging soil and the like crushed and excavated by the electrode 1 is provided. Is provided.

According to the fifth aspect of the invention, the earth and sand which has been electro-crushed is discharged by the continuous discharging mechanism. As a result, efficient underground excavation becomes possible.

According to a sixth aspect of the present invention, in the underground excavator according to the second aspect, the case 19 comprises the electrode 1
Constitutes either the positive electrode 2 or the negative electrode 3 of at least one pair of the electrodes 1.

According to the sixth aspect of the invention, either the positive electrode or the negative electrode of the outer peripheral electrode has a function equivalent to that of the case for retaining the solution. Therefore, the structure is simplified.

According to a seventh aspect of the present invention, a lower traveling body capable of traveling, a vehicle body provided on the lower traveling body, and an end portion of the vehicle body are provided movably in up, down, left, right, and front and rear directions. In an excavator equipped with a working machine arm and a working machine provided at a distal end of the working machine arm, at least one pair of electrodes 1 for electrocrushing provided on a front surface of the working machine;
A pulse generator 1 for applying a high voltage pulse to the electrode 1
0, the solution 9 filled around the electrode 1, and the solution 9 around the electrode 1 is provided around the electrode 1 for retaining water between the front surface of the working machine and the object to be excavated. A case 19, a solution feed pipe 7 for feeding the solution 9 around the electrode 1, a pump 6 for feeding the solution 9 to the front of the excavator via the solution feed pipe, Store 9
A storage tank 5 capable of sucking up the solution 9 by the pump 6 is provided. The electrode 1 is discharged by a high-voltage pulse to excavate an object to be excavated.

According to the seventh aspect of the present invention, the electric crushing can be performed by applying a high voltage pulse by the pulse generator to the electrode provided on the front surface of the working machine at the tip of the working machine arm. At this time, the solution around the electrodes is retained in the case, so that the electric crushing is efficiently performed. Also,
Since the work machine arm can be oriented in any three-dimensional direction and the electrode surface of the work machine can be pressed against the object to be excavated, the free-form surface can be crushed or excavated.

According to an eighth aspect of the present invention, in the excavator according to the seventh aspect, the electrode 1 of the working machine is tiltable with respect to the vehicle body.

According to the eighth aspect of the present invention, the front surface (crushing surface) of the electrode can be inclined with respect to the vehicle body, so that a free-form surface can be excavated and the excavation can be performed efficiently.

The invention according to claim 9 is the invention according to claim 7 or 8.
In the excavator described in (1), the case 19 is configured to include a member that can expand and contract in the longitudinal direction of the electrode 1.

According to the ninth aspect of the present invention, since the case can be extended and contracted in the longitudinal direction of the electrode, even if the depth of excavation by the electrode is increased, the surface of the object to be excavated and the front surface of the case are in close contact. Becomes better. Therefore, the water retention of the solution by the case is improved, and efficient excavation becomes possible.

According to a tenth aspect of the present invention, in an excavating machine having an excavating work machine, at least one pair of electrodes 1 for electric crushing provided at the tip of the excavating work machine, Pulse generator 10 for applying voltage pulse
A solution 9 filled around the electrode 1, a solution feed pipe 7 for feeding the solution 9 around the electrode 1, and the drilling work machine via the solution feed pipe 7. A pump 6 for supplying a solution 9 to the tip of the electrode 1; and a discharging means for sucking up the earth and sand crushed by the discharge at the electrode 1 together with the solution 9 and discharging the soil to the outside of the excavation hole. The excavation target is excavated by discharging with a voltage pulse.

According to the tenth aspect of the present invention, the electric crushing can be performed by applying a high voltage pulse to the electrode provided at the tip of the working machine for excavation by the pulse generator. In addition, the excavated earth and sand, etc. are removed by the solution discharging means.
It is sucked up and discharged to the outside of the excavation hole. At this time, since the solution around the electrode is retained by the excavated hole and the outer electrode or the case surrounding the electrode, the electrocrushing is efficiently performed.

An eleventh aspect of the present invention is the excavator according to the tenth aspect, wherein the at least one pair of electrodes 1
Has an outer peripheral electrode similar to the shape of the hole to be excavated, and an inner electrode disposed at the center of the outer peripheral electrode.

According to the eleventh aspect of the present invention, the outer peripheral portion of the working machine for excavation has a shape similar to a hole to be excavated, and the outer peripheral portion has at least one of a pair of electrodes. Since the electrode is used as the electrode and the other electrode is provided at the center of the electrode, a hole having a desired shape is excavated by electrocrushing. Therefore, efficient excavation becomes possible.

According to a twelfth aspect of the present invention, there is provided an upper vehicle body provided on a lower traveling body, an excavating work machine for excavating in contact with an object to be excavated, and the excavating work machine attached to a tip portion. And a work machine arm having a base end attached to the upper vehicle body and capable of operating a digging position of the digging work machine by performing at least rotation, bending and extension or expansion and contraction, The excavating work machine has a storage chamber 77, which stores the excavated object and the crushed material of the excavated object in the interior surrounded by the outer peripheral wall by bringing the front end of the outer peripheral wall into contact with the excavated object. Crushing head 76 forming 81
80, 80A, 80B, 95, 95A, 95B and the crushing heads 76, 80, 80A, 80B, 95, 95
A, 95B, at least one pair of electrodes 1 for electro-crushing provided in the storage chambers 77, 81, and the storage chambers 77, 81.
The solution 9 filled around the electrode 1 in the inside, the solution supply pipe 7 for supplying the solution 9 to the storage chambers 77 and 81, and the storage chambers 77 and 81 via the solution supply pipe 7. A pump 6 for supplying a solution 9 is provided, and the electrode 1 is discharged with a high voltage pulse to excavate an object to be excavated.

According to the twelfth aspect, by applying a high-voltage pulse to the electrode provided on the crushing head at the tip of the working machine arm, the electric crushing becomes possible. At this time, a storage chamber is formed by abutting the crushing head on the object to be excavated, and the solution around the electrodes is kept at a level of pressure to retain water, so that the electric crushing is performed efficiently. In addition, since the crushing head can be oriented in an arbitrary three-dimensional direction to crush the object to be excavated, it is possible to excavate a tunnel having a free curved surface and a free sectional shape.

According to a thirteenth aspect of the present invention, in the excavator according to the twelfth aspect, the excavator is disposed in serial communication with a lower portion of the storage chamber 81, and is stored in the storage chamber 81. At least one or more storage chambers 84 for sequentially storing the crushed material, at least one movable partition plate 89 for separating the storage chambers 84 from a storage chamber 81 or an upper storage chamber 84, respectively, A movable discharge plate 87 for discharging crushed materials, which is provided in the lowermost storage chamber 84 of the storage chambers 84 and above, is provided.

According to the thirteenth aspect of the present invention, at least one or more storage compartments each partitioned by a plurality of movable partition plates are provided below the storage compartments in series communication with each other, and the one or more storage compartments are provided. A movable discharge plate is provided in the lowermost storage room of the storage rooms. Therefore, after the storage compartment is partitioned by the movable partition plate, the movable discharge plate can be opened to discharge the crushed material in the lowermost storage compartment. That is, since the crushed material can be stored in the storage chamber by a predetermined amount and discharged, the amount of the solution that is discharged together with the crushed material at the time of discharging the crushed material is reduced, and the excavation work with low running cost can be performed. At this time, when the crushed material is filled in each storage room, the lower storage room is sent to the lower storage room, so that the amount of the solution to be sent together can be reduced, so that the solution is not wasted and the running cost is very low. it can.

According to a fourteenth aspect of the present invention, in the excavator according to the twelfth aspect, the storage chamber 81 is provided with a screw conveyor type discharge device 90 or a vacuum type discharge device 91 for discharging the crushed material. And

According to the fourteenth aspect of the present invention, the crushed material stored in the storage chamber is discharged to the outside by a screw conveyor or a vacuum, so that the discharge can be continuously performed, and efficient excavation work can be performed. It becomes possible.

According to a fifteenth aspect, in the excavator according to the twelfth aspect, the crushing heads 95, 95A, 9
A front wall 97 that separates the interior of 5B into the storage chamber 81 and a rear part from the storage chamber 81, and a rear part of the front wall 97, and temporarily stores the solution 9 supplied from the solution supply pipe 7. A solution chamber 96 and crushing heads 95, 95A, 95
When B comes into contact with or separates from the excavation target, communication holes 99, 121, and 122 provided in front wall 97 and communicating between solution chamber 96 and storage chamber 81 are opened and closed, and solution chamber 9 is opened.
A valve 105 for feeding or stopping the feeding of the solution 9 stored in the storage chamber 81 to the storage chamber 81 is provided.

According to the present invention, a solution chamber for temporarily storing the solution is provided in the crushing head, and the supply of the solution from the solution chamber to the storage chamber is provided between the solution chamber and the storage chamber. Alternatively, a valve for stopping the supply was provided. With this valve, a necessary amount of solution can be supplied only at the time of electrocrushing, so that the solution can be saved and the excavation work with low running cost can be performed.

According to a sixteenth aspect of the present invention, there is provided an excavator by electro-fracture, wherein a work machine for generating a discharge by high-voltage energy at the electrode 1 and excavating an object to be excavated by the discharge is provided at the tip of a work machine arm. In the excavation method, the working machine is moved, and the front end of the crushing head 80 having the electrode 1 therein is brought into contact with the object to be excavated, so that the outer peripheral wall of the crushing head 80 and the object to be excavated are inside the crushing head 80. An enclosed storage chamber 81 is formed, and then a solution 9 is supplied into the storage chamber 81 to fill the periphery of the electrode 1, and then a high-voltage pulse is applied to the electrode 1 to cause discharge and discharge. Crushed, then
The crushed material that has been crushed and stored in the storage chamber 81 is stored in the storage chamber 8.
1 to the outside.

According to the present invention, the front end of the crushing head is brought into contact with the object to be excavated to form a storage chamber, and the solution is filled around the electrodes in the storage chamber.
The solution is under pressure. Therefore, the solution is uniformly filled around the electrode, and crushing is efficiently performed.

According to a seventeenth aspect of the present invention, there is provided an excavating machine by electro-fracture, wherein a working machine for excavating an object to be excavated is provided at the tip of a working machine arm by generating a discharge by high voltage energy on the electrode 1. In the excavation method, the working machine is moved, and the front end of the crushing head 80 having the electrode 1 therein is brought into contact with the object to be excavated, so that the outer peripheral wall of the crushing head 80 and the object to be excavated are inside the crushing head 80. An enclosed storage chamber 81 is formed, and then at least one movable partition plate 89 is closed to partition the storage chamber 81 to form at least one or more storage chambers 84. After supplying the solution 9 to the periphery of the electrode 1 and filling the periphery of the electrode 1, a high-voltage pulse is applied to the electrode 1 to discharge it, thereby crushing the object to be excavated, and moving between the storage chamber 81 and the next storage chamber 84. Open the partition plate 89 to open the storage room 8 Send a crushed into feeds, then, when this storage chamber 84 crushed becomes full, the movable partition plate 89
Is closed, and the crushed material is fed from the storage room 84 to the next storage room 84. Thereafter, the crushed material is sequentially fed to the next storage room 84, and the crushed material is provided with a movable discharge plate 87. The crushed material is fed to the lowermost storage chamber 84, and then the movable discharge plate 87 is opened to discharge the crushed material to the outside.

According to the seventeenth aspect of the present invention, the solution is filled in the storage chamber with the movable discharge plate and the movable partition plate closed, so that the solution does not need to be supplied excessively, and The amount may be small. In addition, after crushing, the movable partition plate is closed, and the movable discharge plate is opened to discharge the crushed material.Therefore, the amount of the solution discharged together with the crushed material is small. It becomes possible. At this time, when the crushed material is filled in each storage room, the lower storage room is sent to the lower storage room, so that the amount of the solution to be sent together can be reduced, so that the solution is not wasted and the running cost is very low. it can.

According to an eighteenth aspect of the present invention, there is provided an excavating machine by electro-fracture, wherein a working machine for excavating an object to be excavated is provided at the tip of a working machine arm by generating a discharge by high-voltage energy in the electrode 1. In the excavation method, the working machine is moved, and the front end of the crushing head 80 having the electrode 1 therein is brought into contact with the object to be excavated, so that the outer peripheral wall of the crushing head 80 and the object to be excavated are inside the crushing head 80. An enclosed storage chamber 81 is formed, and then a solution 9 is supplied into the storage chamber 81 to fill the periphery of the electrode 1, and then a high-voltage pulse is applied to the electrode 1 to cause discharge and discharge. Crushed, then
The crushed material that has been crushed and stored in the storage chamber 81 is continuously discharged to the outside of the storage chamber 81.

According to the eighteenth aspect of the present invention, since the crushed material that has been crushed and stored in the storage chamber is continuously discharged to the outside of the storage chamber, efficient excavation work by electric crushing becomes possible.

According to a nineteenth aspect of the present invention, there is provided an excavating machine by electro-fracture, wherein a working machine for excavating an object to be excavated is provided at the tip of a working machine arm by generating a discharge by high-voltage energy in the electrode 1. In the excavation method, the solution 9 is supplied into a solution chamber 96 provided at the rear of the inside of the crushing head 95, and then the work machine is moved to move the front end of the crushing head 80 having the electrode 1 therein. The outer peripheral wall of the crushing head 80 and the storage chamber 81 surrounded by the digging object are formed inside the crushing head 80 by being brought into contact with the digging object, and then the valve 105 is opened to open the solution 9 in the solution chamber 96. The storage room 81
After being supplied to the inside and filling around the electrode 1, a high voltage pulse is applied to the electrode 1 to discharge and crush the object to be excavated. Then, the valve 105 is closed and the crushed object is crushed into the storage chamber 81. The stored crushed material is discharged to the outside of the storage chamber 81.

According to the nineteenth aspect of the invention, since the solution valve is opened to supply the solution during crushing and the solution valve is closed when discharging the crushed material, the amount of the solution discharged together with the crushed material is reduced. It reduces running costs.

[0044]

Embodiments of the present invention will be described below with reference to the drawings. The first embodiment shows an example in which electric crushing is applied to an underground excavator. FIG. 1 is a side sectional view of the underground machine. The electrode 1 is provided on the front surface of the tip of the underground excavator, and includes at least one pair of a positive electrode 2 and a negative electrode 3. In the figure, a predetermined distance is provided between each of the positive electrode 2 and the negative electrode 3. The tip of the underground excavator is rotatable with respect to the main body via a bearing 23, and each electrode 1 is provided with a slip ring 1
6 is connected to a power cable 11 laid on the main body. A high voltage pulse is applied from a pulse generator (not shown) by a power cable 11. In addition, the tip of the underground excavator is a rocking jack 24
To allow the rocking direction to be set arbitrarily.

A water retention cover 14 is provided on the outer periphery of the body of the underground excavator, and the water retention cover 14 is attached to the excavation start end surface of the ground (for example, the side surface of a shaft). A seal member 15 is attached to a contact portion between the water retention cover 14 and the outer peripheral surface of the main body. The water retention cover 14 is provided with a solution supply hole 14a,
The solution 9 is supplied from the pump 6 via the solution supply hole 14a. The supplied solution 9 flows in the direction of the arrow A in the figure through a passage between the outer peripheral surface of the body portion and the tip of the underground excavator and the drilled hole, and flows around the electrode 1 on the front surface of the tip. To meet. In addition, a scraper 25 is provided on the front surface of the distal end portion, and the solution 9 and the electro-crushed earth and sand are taken into the main body from the scraper 25. Then, by the stirring blades 21 provided on the outer peripheral surface of the rotating shaft for rotating the tip of the underground excavator, the taken-in solution 9 and the earth and sand flow in the illustrated arrow B direction and pass through the main body. And is discharged to the rear of the underground excavator.

According to such a configuration, when the tip of the underground excavator is at an arbitrary rotation angle position, a high-voltage pulse is applied between the positive electrode 2 and the negative electrode 3 of the electrode 1, and this electrode 1 Discharge occurs and rocks and the like are crushed by the discharge energy. Since the tip rotates sequentially, a circular hole is drilled in the horizontal direction. The periphery of the electrode 1 is filled with a solution 9 supplied from a pump 6, and the discharge energy is efficiently injected into the rock by the solution 9. The solution 9 at this time is prevented from leaking by the water retention cover 14 and the shield member 15, so that the water 9 is retained between the outer peripheral surface of the underground excavator and the excavated hole. The excavated earth and sand is discharged together with the solution 9 to the rear of the underground excavator. In this way, the lateral hole D is excavated in the ground and the vehicle proceeds.

Next, a second embodiment will be described with reference to FIGS. This embodiment shows another example of the underground excavator. 2 and 3 are side sectional views of the underground excavator, showing a state at the start of excavation and a state during excavation, respectively. As shown in the figure, in this embodiment, the outer peripheral member at the tip of the underground excavator is one of the positive electrode 2 or the negative electrode 3 in the electrode 1, and the other pole is the central part of the tip. It is arranged in. FIG. 1 shows an example in which the negative electrode 3 is used as an outer peripheral member. An insulator 13 is provided between the positive electrode 2 and the negative electrode 3, and a pulse generator 10 is connected to the positive electrode 2 and the negative electrode 3 via a power cable 11. The insulator 13 has a solution feed pipe 7 for supplying the solution 9 around the electrode 1 and a discharge pipe for discharging the excavated earth and sand around the electrode 1 together with the solution 9 to the rear of the underground machine. 8 are provided. A pump 6 is connected to the solution supply pipe 7, and the pump 6 sucks up the solution 9 stored in the storage tank 5 and supplies the solution 9 at a predetermined pressure. An outer peripheral member on the main body side of the underground excavator is insulated from the negative electrode 3 by an insulator 12, and the outer peripheral member is propelled in a digging direction by a propulsion jack 22. A water retention cover 14 is provided on the outer periphery of the body of the underground excavator, and the water retention cover 14 is attached to the excavation start end surface of the ground. A seal member 15 is attached to a contact portion between the water retention cover 14 and the outer peripheral surface of the main body.

FIG. 4 shows an example of the cross-sectional shape of the positive electrode 2 and the negative electrode 3 constituting the electrode 1 in this embodiment. As shown in the figure, the outer peripheral member at the tip of the underground excavator is a negative electrode 3, and the positive electrode 2 is disposed at the center of the negative electrode 3. Then, by applying a high voltage pulse between the positive electrode 2 and the negative electrode 3 by the pulse generator 10, the discharge energy at the electrode 1 breaks rocks and the like between the positive electrode 2 and the negative electrode 3. Therefore, by forming the outer peripheral shape of the electrode 1 to be similar to the desired cross-sectional shape of the hole to be excavated, the shape of the electro-crushed hole can be used without additional excavation. Therefore, a hole having a desired shape can be easily excavated, which is efficient.

Then, the solution is supplied at a predetermined pressure by the pump 6 so that the solution 9 fills the periphery of the electrode 1 on the front surface of the underground machine. The water retaining cover 1 is provided so that the supplied solution 9 does not flow out of the excavation start end surface through the outer peripheral surface of the underground excavator.
4 and its sealing member 15 retain water. As a result, the discharge energy at the electrode 1 is reliably injected into the rock through the solution 9, so that efficient crushing becomes possible. In addition, a water retention case (see the next embodiment) surrounding the periphery of the electrode 1 may be provided on the front surface of the underground excavator, and the solution 9 around the electrode 1 may be retained by this case.

Next, a third embodiment will be described with reference to FIGS. Applying the electro-fracture technique according to the present invention does not require rotating the excavation head when excavating a tunnel, and thus makes it possible to excavate a tunnel having a non-circular cross section in full section. This embodiment shows an example of an underground excavator having a non-circular cross section to which electric crushing is applied.

FIG. 5 is a side sectional view of the underground excavator 60 having a non-circular section. The electrode 1 has a non-circular cross section excavator 6
0 and is connected to a pulse generator 10 disposed in a tunnel by a cable (not shown) or the like so that a high-voltage pulse is applied. Has become. Drilling head 61
A seal member 15 is provided around the inner surface of the tunnel and the excavating head 61.
It has water between the outside. The solution 9 is sent by the pump 6 to the excavation head 61 through the solution supply pipe 7, and the excavation surface of the tunnel in front of the sealing member 15 and the excavation head 61.
Is supplied to a space between the electrode 1 and the outer surface of the electrode 1 and is filled around the electrode 1. A propulsion jack 22 is attached to the rear end of the excavation head 61 so as to be extendable and retractable, and the excavation head 61 is propelled forward as rocks and the like on the front surface are crushed by the expansion and contraction of the propulsion jack 22. And
The crushed material enters a chamber 62 provided inside the excavating head 61, and is then discharged to the rear of the tunnel by a conveyor 33 disposed behind the chamber 62.

When a tunnel excavation operation is performed with such a configuration, the tip of the electrode 1 of the underground excavator 60 having a non-circular cross section is brought into contact with the rock, and the solution 9 is filled around the electrode 1.
At this time, the solution 9 is supplied by the sealing member 15 to the drilling head 6.
The water is kept at the front of 1. Next, a high voltage pulse is applied to the electrode 1 from the pulse generator 10 to discharge the electrode 1, and the rock is electro-crushed. The crushed material enters the chamber 62 and is discharged by the conveyor 33. Thereafter, the excavating head 61 is advanced by the propulsion jack 22. In this way, excavation can proceed continuously and efficiently.

FIG. 6 is a front view of an excavating head 61A showing an example of a non-circular cross-section excavating head according to the present embodiment, and FIG. 7 is a perspective view of the excavating head 61A. As shown in these figures, the cross section perpendicular to the excavation direction of the excavating head 61A has a non-circular shape (here, semicircular), and the front surface of this cross section is divided into a plurality of sector-shaped sections 63A. ing. FIG. 8A is a detailed perspective view of the fan-shaped section 63A, and FIG. 8B is a cross-sectional view taken along the line EE of FIG. 8A. A positive electrode 2 is provided at the center of the sector 63A, and a negative electrode 3 is provided on the outer peripheral wall of the sector 63A. The positive electrode 2 and the negative electrode 3 constitute the electrode 1. As shown in FIG. 8B, the positive electrode 2 is supported in a state insulated from the negative electrode 3 by a support member 64A made of an insulating material such as plastic. In addition, since the space surrounded between the positive electrode 2 and the negative electrode 3 is filled with the solution 9, the discharge energy is efficiently injected into the rock. In this manner, by using the excavating head 61A, a tunnel having a semicircular cross-section can be excavated in all cross-sections, and a tunnel having a desired cross-sectional shape can be excavated in a single excavation, and work can be performed efficiently.

FIG. 9 is a front view of an excavating head 61B having a rectangular cross section, which is another example of a non-circular cross section, and FIG. 10 is a perspective view of the excavating head 61B. The front part of the excavating head 61B is divided into a plurality of rectangular sections 63B. FIG.
FIG. 1A is a detailed perspective view of the rectangular section 63B, and FIG.
FIG. 11B is a sectional view taken along line FF of FIG. Rectangular section 63
A star-shaped positive electrode 2 is provided at the center of B, and a negative electrode 3 is provided on the outer peripheral wall of the rectangular section 63B. The positive electrode 2 and the negative electrode 3 constitute the electrode 1. As shown in FIG. 11B, the positive electrode 2 is supported in a state insulated from the negative electrode 3 by a support member 64B made of an insulating material such as plastic. Then, since the solution 9 is filled in the space surrounded between the positive electrode 2 and the negative electrode 3, discharge energy is efficiently input to the rock. In this way, by using the excavating head 61B, a tunnel having a rectangular cross section can be excavated in all cross sections, and a tunnel having a desired cross sectional shape can be excavated by one excavation, and work can be performed efficiently.

Next, a fourth embodiment will be described with reference to FIGS. This embodiment shows an example in which electric crushing is applied to an excavator. FIG. 12 and FIG. 13 are perspective views of an excavator illustrating an example of the present embodiment. The excavator 30 includes a lower traveling body 31 that can travel freely.
An upper swing body 32 is provided at a substantially central portion on the upper side so as to be swingable. A swing member 37 is attached to the front of the upper swing body 32 so as to be vertically swingable. The swing member 37 is swinged by a swing drive cylinder 38. The swing member 3
7, a working machine 34 for electric crushing is attached via a working machine driving cylinder 39, and the operation of the working machine driving cylinder 39 causes the direction of the working machine 34 for electric crushing to be three.
It can be oriented in any direction in the dimensional space. That is, the front surface of the electric crushing work machine 34 can be inclined in an arbitrary three-dimensional direction with respect to the upper rotating body 32. Further, a conveyor 33 is provided from below the working machine 34 for electric crushing to the rear of the excavator, and discharges excavated earth and sand.

The electric crushing work machine 34 has a plurality of electrodes 1
Are arranged two-dimensionally (in a plane). Each electrode 1 is composed of a positive electrode 2 and a negative electrode 3. In the present embodiment, the negative electrode 3 is formed in a square pillar and hollow shape.
Is provided at the center of the hollow portion of the negative electrode 3. And
The excavation surface of each electrode 1 is arranged facing the same direction,
The entire excavation surface of the plurality of electrodes 1 constitutes the excavation surface of the electric crusher working machine 34.

FIG. 14 shows the mounting structure of the electrode 1 in the electric crusher 34. The electrode 1 is attached to a support member 36 provided on the electric crushing work machine 34 by a spring 35.
Attached through. Each electrode 1 can move forward or backward in a direction perpendicular to the excavation surface of the electric crushing work machine 34. Thereby, each electrode 1 can be brought into close contact with the uneven surface on the surface of the object to be excavated. The negative electrode 3 of each electrode 1 has the same function as the case for retaining the solution 9, and the solution 9 supplied to the electrode 1 has the same function.
Is retained inside the negative electrode 3 and around the positive electrode 2.

FIG. 15 shows an example of a side sectional view of each electrode 1. An insulator 13 is provided inside the hollow of the negative electrode 3, and the positive electrode 2 is provided inside the insulator 13 at the hollow center of the negative electrode 3. The positive electrode 2 and the negative electrode 3
Is connected to a pulse generator 10. The tips of the positive electrode 2 and the negative electrode 3 protrude forward from the front end of the insulator 13. The insulator 13 is provided with a solution feed pipe 7, and the solution 9 in the storage tank 5 is fed by a pump 6 in the C direction shown in the drawing, and the solution 13 of the insulator 13 is passed through the solution feed pipe 7. It is supplied to the front, that is, to the tips of the positive electrode 2 and the negative electrode 3. The supplied solution 9 includes the negative electrode 3 and the insulator 13
And the area surrounded by the surface of the excavation object. At this time, when a predetermined highly viscous solution such as grease or an aqueous solution of a water-absorbing polymer is supplied as the solution 9, the water retention area becomes slightly pressurized, and the area around the positive electrode 2 and the negative electrode 3 The solution 9 becomes easier to retain water. Further, it is also possible to completely fill the periphery of the electrode 1 in the water retaining area with a water retaining material 18 such as a sponge, and absorb the solution 9 into the water retaining material 18 to retain water. In addition, when the sealing member 17 is provided on the outer peripheral surface of the tip portion of the negative electrode 3, the water retention is further improved.

FIG. 16 shows another configuration example of each electrode 1, in which the positive electrode 2 and the negative electrode 3 are housed in a case 19. As shown in the figure, a case for retaining the solution 9 for each electrode 1 may be provided outside the electrode 1.

As described above, the highly viscous solution 9 is supplied to the pump 6
, The solution 9 around the electrode 1 becomes slightly pressurized, and thus has good water retention. Furthermore, the water retention can be improved by filling the water retention material 18 in the water retention area around the electrode 1. The excavator as shown in the present embodiment can be applied to, for example, demolition work of buildings, crushing of rocks and the like by blasting, and the like. It can also be used as an excavator in the open caisson method.

Next, a fifth embodiment will be described with reference to FIGS. 17 and 18 are perspective views showing an example of the excavator according to the present embodiment. The excavator 40 has a lower traveling body 41 that can travel freely, and an upper revolving body 42 is provided at a substantially central portion on the lower traveling body 41 so as to freely pivot. A boom 43 is attached to the front of the upper swing body 42 so as to be vertically swingable, and an arm 44 is attached to the tip of the boom 43 so as to be vertically swingable. The boom 43 and the arm 44 are respectively oscillated by, for example, an oscillating drive cylinder. An electric crushing work machine 45 having a shape elongated in the left-right direction toward the front of the excavator 40 is attached to a distal end portion of the arm 44. The angle formed between the longitudinal direction of the working machine 45 for electric crushing and the arm 44 can be changed by, for example, a working machine driving cylinder.

A plurality of electrodes 1 are arranged in a single row in the longitudinal direction at the front part of the working machine 45 for electric crushing. Each electrode 1 is composed of a positive electrode 2 and a negative electrode 3, each of which protrudes elongated toward the front of the electric crushing work machine 45. In the present embodiment, the positive electrodes 2 and the negative electrodes 3 are alternately arranged. The periphery of all the electrodes 1 is surrounded by a sealing member 46 that can be extended and contracted in the longitudinal direction of the electrodes 1. FIG. 19 shows a side cross-sectional view of the working machine 45 for electric crushing. The solution 9 supplied around the positive electrode 2 and the negative electrode 3 is retained in a region surrounded by the seal member 46 and the surface of the object to be excavated.

According to the above configuration, the electric crushing working machine 4
Since the extensible seal member 46 is provided at the front part of 5, the solution 9 around the electrode 1 can be retained between the electrode 9 and the surface of the object to be excavated. At this time, even if the object to be excavated is crushed by the discharge at the electrode 1 and the excavation depth is increased,
Due to the expansion and contraction function of the seal member 46, the seal member 46
Good adhesion to the surface of the excavation object. As a result, water retention is improved and efficient excavation can be performed. Also,
Since the electrodes 1 of the electric crushing machine 45 are arranged in a line, it is suitable for excavating in an elongated groove shape. And
By arbitrarily changing the angle formed between the longitudinal direction of the electric crushing machine 45 and the arm 44, grooving of an arbitrary shape in free space becomes possible.

Next, a sixth embodiment will be described. This embodiment shows an example of application of electro-crushing to a boring machine, and FIG. 20 is a side view showing an example of this embodiment. In the figure, a boring machine 50 is a lower traveling body 5 that can travel freely.
1, and an upper revolving body 52 is rotatably provided at a substantially central portion of the lower traveling body 51. Upper revolving superstructure 52
Above, a pump 6 for supplying the solution 9 and a pulse generator 10 for generating a high voltage pulse are provided. A drum 57 is provided on the upper revolving unit 52, and a solution feed pipe 7 for feeding the solution 9 from the pump 6 and a power cable 11 connected to the pulse generator 10 are connected to a boring work machine 54. Cable 55 leading to the drum 5
7 makes it stretchable. A boom 53 is provided at the front end of the upper swing body 52 so as to be vertically swingable.
A roller 58 is rotatably attached to the boom 53. The cable 55 is guided from the drum 57 to the boring machine 54 via the rollers 58. The excavated soil and the like are collected by the cable 55 together with the solution 9 on the drum 57 side and are discharged from the drum 57.
By 9, the soil is discharged outside the boring machine 50.

The boring machine 54 is provided with electrodes for electrocrushing. This electrode, as in the previous embodiment,
It may be composed of a plurality of electrodes. Alternatively, the electrode may be composed of the negative electrode 3 constituting the outer peripheral portion of the boring machine 54 and the positive electrode 2 provided at the center of the negative electrode 3. A case is provided around the electrode, and the cable 5
The solution 9 fed via 5 is retained around the electrodes by a case. When the negative electrode 3 constitutes the outer periphery of the boring machine 54, the negative electrode 3 has the same function as the above case, and the solution 9 is retained in the negative electrode 3. In this case, the outer peripheral shape of the negative electrode 3 is
The cross-sectional shape can be similar to the borehole to be drilled. This eliminates the need to additionally drill a drilled hole after drilling, thereby enabling efficient drilling.

Next, a seventh embodiment will be described with reference to FIGS. This embodiment shows an example of application of electric crushing to a free-section excavator. FIG. 21 is a side view showing an example of this embodiment, and FIG. 22 is a rear view. In the figure,
The free-section excavator 70 includes a lower traveling body 71 that can travel freely, and an upper body 72 is disposed above the lower traveling body 71. In the present embodiment, the upper vehicle body 72 is rotatably mounted substantially at the center of the lower traveling body 71, and hence the upper vehicle body 72 is hereinafter referred to as the upper revolving body 72.
Call. A gantry 73 provided at the front end of the upper swing body 72
The first arm 74 is attached to the first arm 74 so as to be rotatable about a horizontal axis XX and to be rotatable in a plane including the horizontal axis XX. The second arm 75 is rotatably attached to the portion in a plane including the same horizontal axis XX as the first arm 74. A crushing head 76 is attached to the tip of the second arm 75 so as to be rotatable in a plane including the same horizontal axis XX as the first arm 74.

The position and posture of the crushing head 76 are determined by the rotation of the upper swing body 72, the rotation of the first arm 74 about the horizontal axis XX or the rotation in the plane including the horizontal axis XX, and 2
A predetermined excavation position is set by performing an operation such as rotation of the arm 75 or the crushing head 76 in a plane including the horizontal axis XX. Therefore, as shown in FIG. 22, it is possible to excavate an excavation hole, a tunnel, or the like having a free sectional shape. The operation mode of the working machine arm for setting the position and posture of the crushing head 76 to a predetermined excavation position is not limited to the above. In other words, the position and posture of the crushing head 76 can be similarly controlled by rotating, bending, or expanding and contracting the work machine arm around a predetermined axis. In addition, the upper vehicle body is rotatable with respect to the lower traveling body. However, the present invention is not limited to this. For example, the work implement arm may be rotatable with respect to the upper vehicle body.

FIG. 23 is a sectional view showing the detailed structure of the crushing head 76. In the figure, a sealing member 46 is provided at the front end of the outer peripheral wall of the crushing head 76,
By contacting the sealing member 46 with the front of the digging object Z, the storage chamber 77 is formed between the digging object Z, the outer peripheral wall of the crushing head 76, and the insulator 13 inside the crushing head 76. Is formed. In the storage chamber 77, the positive electrode 2 and the negative electrode 3 of each electrode pair of the plurality of electrodes 1 are attached via an insulator 13. Each of the positive electrode 2 and the negative electrode 3 is connected to the vehicle body side of the free-section excavator 70. Alternatively, the same pulse generator 10 (not shown) provided outside the vehicle body as described above.
Connected to the high voltage output terminal of In addition, storage room 77
Is connected to a solution supply pipe 7 for supplying a solution 9 from a pump 6.

Next, an excavation method according to this embodiment will be described. (1) As shown in FIG. 23, the storage member 77 is formed by bringing the seal member 46 on the front surface of the crushing head 76 into contact with the excavation target Z. (2) Next, the solution 9 is supplied from the pump 6 via the solution supply pipe 7, and the solution 9 is filled around the electrode 1 in the storage chamber 77. (3) Next, the electrode 1 is discharged by a high-voltage pulse from the pulse generator 10 to electrically crush the excavation target Z. (4) After a predetermined amount of crushed material is stored in the storage chamber 77,
As shown in FIG. 24, the crushing head 7 is rotated by rotating the upper rotating body 72, rotating the first arm 74, or rotating the second arm 75 or the crushing head 76, or the like.
6 is separated from the excavation target Z, and the crushed material is discharged to the outside of the storage chamber 77. (5) Excavation is performed by repeating the above operations (1) to (4).

Hereinafter, embodiments of various crushing heads will be sequentially described. Based on FIG. 25 and FIG.
An embodiment will be described. FIG. 25 is a side sectional view showing the configuration of the crushing head 80 of the present embodiment. In the figure,
A sealing member 46 is attached to a front end portion of the outer peripheral wall of the crushing head 80. By contacting the sealing member 46 with the excavation target Z, the excavation target Z
The outer peripheral wall of the crushing head 80 and the bottom plate 8 of the crushing head 80
The storage chamber 81 is formed between the storage chamber 81 and the storage chamber 81. On the front surface of the crushing head 80, each electrode pair of the plurality of electrodes 1, the positive electrode 2 and the negative electrode 3 are attached via an insulating member 82. It is connected to a high voltage output terminal of a pulse generator 10 (not shown) similar to the above, which is provided on the vehicle body side or outside the vehicle body. Further, a hole 83 having a predetermined size is provided in the insulating member 82 to allow the crushed material to pass. Further, a solution feed pipe 7 is attached to the upper part of the crushing head 80, and the solution 9 can be supplied from a pump (not shown) via the solution feed pipe 7. And
At the lower part of the storage room 81, a storage room 84 capable of partitioning from the upper storage room 81 is formed. At the lower part of the storage room 84, a discharge port 85 is provided. This outlet 85
The movable discharge plate 87 opened and closed by the first cylinder 86
A movable partition plate 89 opened and closed by a second cylinder 88 is provided between the storage chamber 81 and the storage chamber 84.
Is provided.

Next, an excavation method according to this embodiment will be described. (1) As shown in FIG. 25, the storage member 81 is formed by bringing the seal member 46 on the front surface of the crushing head 80 into contact with the excavation target Z. (2) Next, the first cylinder 86 and the second cylinder 88 are operated to close the movable discharge plate 87 and the movable partition plate 89 to separate the storage chamber 81 from the storage chamber 84. (3) Next, the solution 9 is supplied from the solution supply pipe 7 to the storage chamber 81, and is filled around the electrode 1. (4) Next, the electrode 1 is discharged by a high voltage pulse from the pulse generator 10 to crush the excavation object Z. (5) Next, as shown in FIG. 25, the second cylinder 88 is operated to open the movable partition plate 89, and the crushed material stored in the storage chamber 81 is moved to the storage chamber 84. (6) Further, after a predetermined amount of the crushed material is stored in the storage chamber 84, as shown in FIG. 26, the second cylinder 88 is operated to close the movable partition plate 89, and then the first cylinder 86 is operated. Then, the movable discharge plate 87 is opened, and the crushed material is discharged out of the storage chamber 84. (7) Excavation is performed by repeating the above operations (1) to (6).

Accordingly, since the crushing head 80 can be excavated without separating from the excavation target Z, the work efficiency is improved. Also, since the solution 9 is initially supplied only to the storage chamber 81, the supply amount of the solution 9 may be small,
Further, when the crushed material is discharged, only the amount temporarily stored in the storage chamber 84 is used, so that the amount of the discharged solution 9 can be reduced, and the running cost can be reduced. In the present embodiment, one storage chamber 84 is provided below the storage chamber 81, but the present invention is not limited to this. For example,
As shown in FIG. 27, a plurality of storage chambers 84, 84 are arranged in series below the storage chamber 81, and each storage chamber is partitioned by a movable partition plate 89 opened and closed by a second cylinder 88. You may. In this case, the crushed material stored in the storage room 81 is sequentially sent to the lower storage room 84, and when the storage room 84 becomes full, it is sent to the next storage room 84.
In this way, after being sent to the lowermost storage chamber 84, the movable discharge plate 87 of the storage chamber 84 can be opened and discharged to the outside. Thereby, the discharge amount of the solution 9 can be reduced, and the running cost can be extremely reduced.

FIG. 28 shows a crushing head 80 according to the ninth embodiment.
FIG. 2 is a side sectional view showing a configuration of A. The configuration of the present embodiment is the same as that of the eighth embodiment except for the crushed material discharging structure. Therefore, the same components are denoted by the same reference numerals and the description thereof will be omitted, and only different portions will be described. A screw conveyor type discharge device 90 for discharging crushed material is provided at the lower end of the crushing head 80A.
Is provided. This screw conveyor type discharge device 90
Is a discharge pipe 92 and a discharge pipe 92 inside the discharge pipe 92.
Screw 9 that rotates around a rotation axis along the length of
3 and a screw driving device (not shown) for driving the screw 93 to rotate.

Next, an excavation method will be described. (1) As shown in FIG. 28, the sealing member 46 on the front surface of the crushing head 80 </ b> A is brought into contact with the object to be excavated Z to make the storage chamber 81.
To form (2) Next, the solution 9 is supplied from the solution supply pipe 7 to the storage chamber 81, and is filled around the electrode 1 (consisting of the positive electrode 2 and the negative electrode 3 as in the previous embodiment). (3) Next, the electrode 1 is discharged by a high voltage pulse from the pulse generator 10 to crush the excavation object Z. (4) Next, the screw conveyor type discharge device 90 is operated to discharge the crushed material to the outside of the storage chamber 81.

Therefore, the work of excavation and crushed material discharge is performed continuously, which is efficient. A separating device (not shown) for separating the crushed material and the solution 9 may be provided at the discharge port of the screw conveyor type discharging device 90, and the solution 9 separated by the separating device may be reused.

FIG. 29 shows a crushing head 8 according to the tenth embodiment.
FIG. 3 is a side cross-sectional view showing the configuration of FIG. The configuration of the present embodiment is the same as that of the eighth embodiment except for the crushed material discharge structure. Therefore, the same components are denoted by the same reference numerals, and the description thereof will not be repeated. At the lower end of the crushing head 80B, a vacuum discharge device 91 for discharging the crushed material is provided. The vacuum discharge device 91 includes a discharge pipe 92.
The internal pressure is made lower than the external pressure, and the crushed material and the solution 9 flowing into the discharge pipe 92 are discharged to the outside of the storage chamber 81.

Next, an excavation method will be described. (1) As shown in FIG. 29, the sealing member 46 on the front surface of the crushing head 80 </ b> B is brought into contact with the object Z to be digged, and the storage chamber 81 is formed.
To form (2) Next, the solution 9 is supplied from the solution supply pipe 7 to the storage chamber 81, and is filled around the electrode 1 (consisting of the positive electrode 2 and the negative electrode 3 as in the previous embodiment). (3) Next, the electrode 1 is discharged by a high voltage pulse from the pulse generator 10 to crush the excavation object Z. (4) Next, the vacuum discharge device 91 is operated by a vacuum device (not shown) to discharge the crushed material to the outside of the storage chamber 81.

Therefore, the work of excavation and crushed material discharge is performed continuously, which is efficient. Note that a separation device (not shown) for separating the crushed material and the solution 9 may be provided at the discharge port of the vacuum discharge device 91, and the solution 9 separated by the separation device may be reused.

FIG. 30 shows a crushing head 9 according to the eleventh embodiment.
5 is a side sectional view showing the configuration of FIG. In the figure, a sealing member 46 is attached to the front end of the outer peripheral wall of the crushing head 95, and by contacting the sealing member 46 with the digging object Z, the digging object Z and the crushing head 95 are attached.
A storage chamber 81 is formed between the outer peripheral wall of the crushing head 95 and a front wall 97 that separates a front portion and a rear portion inside the crushing head 95. In the storage chamber 81, each electrode pair of the plurality of electrodes 1, the positive electrode 2 and the negative electrode 3 are provided via a front wall 97 made of an insulator. Also, at the inner rear of the crushing head 95,
A solution chamber 96 partitioned from the storage chamber 81 by the front wall 97 is provided.

FIG. 31 is a detailed view of the periphery of the positive electrode 2 and the negative electrode 3 of each electrode 1. The front wall 97 is provided with a concave portion 98 which is recessed on the storage chamber 81 side.
A communication hole 99 for supplying the solution 9 to the storage chamber 81 is provided. In the center of the bottom of the recess 98, a solution chamber 96 is provided.
A through hole 100 penetrating through the storage chamber 81 is provided. The through hole 100 is provided at the tip side of the electrode 1 (the storage chamber 81).
Side) is slidably penetrated, and the base end of the electrode 1 is inserted into a support hole 102 provided in the rear wall 101 of the solution chamber 96 and slidably supported. At the center of the electrode 1, a flange 103 is provided.
A spring 104 is interposed between 03 and the rear wall 101, and constantly biases the electrode 1 toward the front wall 97. During the excavation work, the tip of the electrode 1 is always in contact with the excavation target Z by this urging force. A valve 105 is provided on the front surface of the flange 103. The valve 105 comes into contact with the front wall 97 by the urging force of the spring 104 as shown by a thin two-dot chain line in FIG. The supply of the solution 9 to the storage chamber 81 is stopped.

Next, an excavation method will be described. (1) The solution 9 is supplied from the solution supply pipe 7 to the solution chamber 96. (2) Next, as shown in FIG. 30, the sealing member 46 of the crushing head 95 is brought into contact with the excavation target Z to form the storage chamber 81. At this time, the electrode 1 is pressed by the excavation target Z and overcomes the urging force of the spring 104 and moves rearward, whereby the valve 105 separates from the front wall 97. At this time, the solution 9 is supplied to the storage chamber 81 through the communication hole 99 as shown by the arrow, and is filled around the electrode 1. (3) Next, the electrode 1 is discharged by a high voltage pulse from the pulse generator 10 to crush the excavation object Z. (4) Next, the crushing head 95 is moved to
6 is separated from the excavation target Z, and the crushed material at this time is discharged to the outside of the storage chamber 81. At this time, the electrode 1 is
Is moved in the direction of the front wall 97 by the urging force of
Numeral 05 abuts on the front wall 97 as shown by the thin two-dot chain line in FIG. 31 to stop the supply of the solution 9 to the storage chamber 81. (5) Excavation is performed by repeating the above operations (1) to (4).

As described above, since the supply of the solution 9 to the storage chamber 81 is stopped by the valve 105 when the crushing head 95 is separated from the excavation object Z, the amount of the solution 9 discharged together with the crushed material is small. , Running costs are reduced.

FIG. 32 shows a crushing head 9 according to the twelfth embodiment.
It is a side sectional view showing composition of 5A. In the same figure, a sealing member 46 is attached to the front end of the outer peripheral wall of the crushing head 95A, and the sealing member 46 is brought into contact with the digging object Z, whereby the digging object Z and the crushing head 95A are attached. A storage chamber 81 is formed between an outer peripheral wall of the crushing head 95A and a front wall 97 that partitions between a front portion and a rear portion inside the crushing head 95A. Further, a solution chamber 96 partitioned by the front wall 97 is provided at a rear portion inside the crushing head 95A. Further, in the storage chamber 81, each electrode pair of the plurality of electrodes 1, the positive electrode 2 and the negative electrode 3 are provided via the front wall 97 made of an insulator. Each electrode 1 (positive electrode 2
The base end of the negative electrode 3) penetrates from the storage chamber 81 to the solution chamber 96, and is slidably supported by the front wall 97. Further, a step having an end surface 114 on the front wall 97 side is provided at the center of each electrode 1, and each electrode 1 is provided with this end surface 114.
The front wall 97 is urged forward (from the storage chamber 81 toward the excavation object Z) by a spring 110 interposed between the storage chamber 81 and the front wall 97. Due to this urging force, each electrode 1 is always in contact with the excavation target Z during the excavation work. A valve chamber 120 is provided substantially at the center of the front wall 97. Further, a discharge port 111 is provided on the lower surface of the storage chamber 81, and a discharge gate 113 which is opened and closed by a cylinder 112 is provided.

FIG. 33 is a detailed sectional view of the valve chamber 120. The valve chamber 120 is provided with a first communication hole 121 communicating with the solution chamber 96 and a second communication hole 122 communicating with the storage chamber 81. In the valve chamber 120, a valve stem 123 having a valve 105 is provided at a front end (on the storage chamber 81 side), and a rear end portion of the valve stem 123 is engaged with a solenoid 124 through the valve chamber 120. The valve stem 123 is always in the second position by the spring 125.
The valve stem 123 is urged toward the communication hole 122 and is energized by the solenoid 124 so that the valve stem 123
It moves to the fourth side to open and close the second communication hole 122.

Next, an excavation method will be described. (1) The solution 9 is supplied from the solution supply pipe 7 to the solution chamber 96. (2) Next, as shown in FIG. 32, the sealing member 46 of the crushing head 95A is brought into contact with the excavation target Z to form the storage chamber 81. At this time, the tip portion of the electrode 1 is pressed against the excavation target Z, and moves backward by a predetermined amount by overcoming the urging force of the spring 110. Therefore, by this biasing force,
The electrode 1 always contacts the excavation target Z. (3) Next, the solenoid 124 is operated by energization to move the valve stem 123 toward the solenoid 124,
The valve 105 is opened to communicate the second communication hole 122, and a predetermined amount of the solution 9 in the solution chamber 96 is supplied to the storage chamber 81 via the first communication hole 121 to fill around the electrode 1. (4) Next, the energization of the solenoid 124 is stopped, the valve 105 is closed, and the supply of the solution 9 to the storage chamber 81 is stopped. (5) Next, the electrode 1 is discharged by a high voltage pulse from the pulse generator 10 to crush the excavation object Z. (6) Next, after a predetermined amount of the crushed material is stored in the storage chamber 81, the discharge gate 113 is operated by the cylinder 112, the discharge port 111 is opened, and the crushed material is discharged to the outside of the storage chamber 81. (7) Next, the discharge gate 113 is operated to set the discharge port 11
Close 1. (8) Excavation is performed by repeating the above operations (1) to (7).

Therefore, excavation work can be performed without separating the crushing head 95A from the excavation object Z, which is very efficient. In addition, the supply amount of the solution 9 can be arbitrarily adjusted, whereby the discharge amount of the solution 9 when the crushed material is discharged to the outside of the storage chamber 81 can be reduced, and the running cost can be reduced.

FIG. 34 shows a crushing head 9 according to the thirteenth embodiment.
It is side surface sectional drawing which shows the structure of 5B. The configuration of this embodiment is different from the twelfth embodiment only in the opening / closing mechanism of the valve 105. Therefore, the same components are denoted by the same reference numerals, and description thereof will be omitted, and only different configurations will be described. In the figure, a concave portion 98 is provided at a substantially central portion of the front wall 97 on the storage chamber 81 side.
A communication hole 99 that communicates with the storage chamber 81 is provided, and a valve stem 130 is slidably disposed at the center of the recess 98.

FIG. 35 is a detailed sectional view of the periphery of the valve stem 130. In the center of the bottom of the concave portion 98, a through-hole 133 penetrating from the solution chamber 96 to the storage chamber 81 is provided, and the base end side of the valve stem 130 slidably penetrates the through-hole 133. This valve stem 130
A flange 134 is provided at an end on the solution chamber 96 side, and a valve 105 is provided on a surface of the flange 134 facing a surface on the solution chamber 96 side of the front wall 97 near the recess 98. . A flange 132 is provided at an intermediate portion of the valve stem 130 penetrating the storage chamber 81, and a spring 131 is provided between the flange 132 and the bottom of the concave portion 98. The stem 130 is urged toward the storage chamber 81. When the distal end of the valve stem 130 contacts the excavation target Z and is pressed by overcoming this biasing force, the valve stem 130 moves while shortening the spring 131, and the valve 105 opens to open the solution chamber 96 and the storage chamber. 81 communicates. When the tip is separated from the excavation target Z, the valve stem 130
The spring 105 moves to a position shown by a thin two-dot chain line by the urging force of the spring 131, and the valve 105 is closed.

Next, an excavation method will be described. (1) The solution 9 is supplied to the solution chamber 96 from the solution supply pipe 7. At this time, the valve 105 is closed, and the solution 9 is stored in the solution chamber 96. (2) Next, as shown in FIG. 34, the sealing member 46 of the crushing head 95B is brought into contact with the excavation target Z, and
To form At this time, electrode 1 (pair of positive electrode 2 and negative electrode 3)
Abuts against the excavation target Z, and shortens the spring 110 by a predetermined amount. At the same time, the tip of the valve stem 130 also comes into contact with and is pressed against the excavation object Z, shortening the spring 131 and opening the valve 105. As a result, the solution 9 is stored in the solution chamber 96.
Is supplied to the storage chamber 81 through the communication hole 99 and the electrode 1
Is filled around. (3) Next, the electrode 1 is discharged by a high voltage pulse from the pulse generator 10 to crush the excavation object Z. (4) Next, after a predetermined amount of the crushed material is stored in the storage chamber 81, the crushing head 95B is moved backward,
6 is separated from the excavation target Z, and the crushed material is discharged to the outside of the storage chamber 81. At this time, the valve stem 130 moves forward as shown by the thin two-dot chain line in FIG.
Is closed to stop the supply of the solution 9 to the storage chamber 81. (5) Excavation is performed by repeating the above operations (1) to (4). Therefore, the solution 9 discharged when the crushed material is discharged
The running cost can be reduced by reducing the amount of running.

As described above, in the present invention, a solution 9 such as an electrolytic solution is surely filled around the tip of an underground excavator or an electrode provided in an excavation head of an excavator. Water is kept. As a result, it is possible to efficiently perform electro-fracture by discharging electricity into the crushed material itself such as rock or generating a shock wave in the solution by discharging in the solution. .

In other words, efficient crushing by discharging electricity into the crushed material itself such as rock can be achieved by appropriately setting the rise time of the pulse voltage applied to the electrodes. For example, FIG. 36 shows a general relationship between the rise time of the applied pulse voltage and the withstand voltage of each insulator when the pulse voltage is applied. Here, the horizontal axis represents the rise time of the applied pulse voltage (usually, the maximum value of 1 of the pulse voltage).
The vertical axis represents the withstand voltage, and the horizontal axis represents a semilogarithmic scale with a logarithmic scale. In the figure, curves 141, 142, and 143 represent characteristics of water, marble, and sandstone, respectively. As can be seen from the figure, when, for example, water is used as the solution, the withstand voltage of rocks such as marble and sandstone is smaller than that of water when the rise time of the pulse voltage is short. Therefore, at this time,
Discharge current flows more easily in rocks than in solution (water)
Therefore, it is suitable for drilling a hole in the rock at the start of crushing to increase the crushing efficiency of the rock, or for crushing the rock deeply. In the above description, when the rising time of the pulse voltage is long, the withstand voltage of rocks such as marble and sandstone has a higher withstand voltage than water. Therefore, at this time, the discharge current flows more easily in the solution (water) than in the rock, and thus it is suitable for crushing over a wide range by a shock wave generated in the solution.

As described above, even when the same solution is used, the rise time of the applied pulse voltage, the withstand voltage of the component such as rock to be crushed, the withstand voltage of the solution, From the relationship, the path of the discharge current can be selected by changing the rise time of the applied pulse voltage. This allows you to discharge in solution,
Alternatively, it is possible to select whether to discharge in a rock. As a result, underground excavation or rock excavation by electric crushing can be efficiently performed.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an underground excavator according to a first embodiment of the present invention.

FIG. 2 is a side sectional view (at the start of excavation) of an underground excavator according to a second embodiment of the present invention.

FIG. 3 is a side cross-sectional view (during excavation) of an underground excavator according to a second embodiment of the present invention.

FIG. 4 shows an example of a cross-sectional shape of an electrode of an underground excavator according to a second embodiment of the present invention.

FIG. 5 is a side cross-sectional view of a non-circular cross-section excavator according to a third embodiment of the present invention.

FIG. 6 shows a front view of a semicircular digging head of an underground excavator according to a third embodiment of the present invention.

FIG. 7 shows a perspective view of a semicircular drilling head of an underground excavator according to a third embodiment of the present invention.

FIG. 8 shows the shape and mounting structure of an electrode of a semicircular digging head of an underground machine according to a third embodiment of the present invention.

FIG. 9 shows a front view of a rectangular drilling head of an underground excavator according to a third embodiment of the present invention.

FIG. 10 shows a perspective view of a rectangular drilling head of an underground excavator according to a third embodiment of the present invention.

FIG. 11 shows a shape and a mounting structure of an electrode of a rectangular excavating head of an underground excavator according to a third embodiment of the present invention.

FIG. 12 shows a perspective view of an example of an excavator according to a fourth embodiment of the present invention.

FIG. 13 shows a perspective view of an example of an excavator according to a fourth embodiment of the present invention.

FIG. 14 shows an electrode mounting structure of an excavator according to a fourth embodiment of the present invention.

FIG. 15 is a side sectional view of an electrode of an excavator according to a fourth embodiment of the present invention.

FIG. 16 is a side sectional view of an electrode according to another example of the fourth embodiment of the present invention.

FIG. 17 shows a perspective view of an example of an excavator according to a fifth embodiment of the present invention.

FIG. 18 is a perspective view of an example of an excavator according to a fifth embodiment of the present invention.

FIG. 19 is a side sectional view of a working machine of an example of an excavator according to a fifth embodiment of the present invention.

FIG. 20 shows a side view of an example of a boring machine according to a sixth embodiment of the present invention.

FIG. 21 is a side view of an example of a free-section excavator according to a seventh embodiment of the present invention.

FIG. 22 is a rear view of the example of the free-section excavator according to the seventh embodiment of the present invention.

FIG. 23 is a side sectional view showing an excavation state of an excavation head of an example of a free-section excavator according to a seventh embodiment of the present invention.

FIG. 24 is a side sectional view showing a discharge state of an excavating head of an example of a free-section excavator according to a seventh embodiment of the present invention.

FIG. 25 is a side sectional view showing an excavation state of a crushing head according to an eighth embodiment of the present invention.

FIG. 26 is a side sectional view showing a discharge state of a crushing head according to an eighth embodiment of the present invention.

FIG. 27 is a side sectional view showing another configuration of the crushing head according to the eighth embodiment of the present invention.

FIG. 28 is a side sectional view of a crushing head according to a ninth embodiment of the present invention.

FIG. 29 is a side sectional view of a crushing head according to a tenth embodiment of the present invention.

FIG. 30 is a side sectional view of a crushing head according to an eleventh embodiment of the present invention.

FIG. 31 is a detailed view of an electrode peripheral portion of a crushing head according to an eleventh embodiment of the present invention.

FIG. 32 is a side sectional view of a crushing head according to a twelfth embodiment of the present invention.

FIG. 33 is a detailed view of a valve chamber of a crushing head according to a twelfth embodiment of the present invention.

FIG. 34 is a side sectional view of a crushing head according to a thirteenth embodiment of the present invention.

FIG. 35 is a detailed view around a valve stem of a crushing head according to a thirteenth embodiment of the present invention.

FIG. 36 is an explanatory view of the action and effect of electro-crushing by water retention of a solution according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Electrode, 2 ... Positive electrode, 3 ... Negative electrode, 5 ... Reservoir, 6 ... Pump, 7 ... Solution feed pipe, 8 ... Discharge pipe, 9 ... Solution, 10 ... Pulse generator, 11 ... Power cable, 12, DESCRIPTION OF SYMBOLS 13 ... Insulator, 14 ... Water retention cover, 15, 17, 46 ... Seal member, 16 ... Slip ring, 18 ... Water retention material, 19 ... Case, 20 ... Excavator, 21 ... Stirring blade, 22 ... Propulsion jack, 23 ... Bearing, 24: swinging jack, 25: scraper, 30, 40: excavator, 31, 41, 51: lower traveling body, 32, 42, 52: upper revolving body, 33, 59
... Conveyer, 34 ... Electrical crushing work machine, 35 ... Spring, 36 ... Support member, 37 ... Swing member, 38 ... Swing drive cylinder, 39 ... Work machine drive cylinder, 43, 53 ... Boom, 44 ... Arm, 45 ... Working machine for electric crushing, 50 ...
Boring machine, 54 ... Boring work machine, 55 ... Cable, 57 ... Drum, 58 ... Roller, 60 ... Non-circular cross section underground excavator, 61 ... Drilling head, 62 ... Chamber, 6
4. Support member, 71: Lower traveling body, 72: Upper revolving body,
73: stand, 74: first arm, 75: second arm, 7
6, 80, 95 ... drilling head, 77, 81 ... storage room, 8
4 ... storage room, 87 ... movable discharge plate, 89 ... movable partition plate, 9
0: screw conveyor type discharge device, 91: vacuum type discharge device, 98: concave portion, 99: communication hole, 104, 11
0, 125, 131 ... spring, 105 ... valve, 111 ...
Discharge port, 113 ... discharge gate, 120 ... valve chamber, 12
DESCRIPTION OF SYMBOLS 1 ... 1st communication hole, 122 ... 2nd communication hole, 123, 130
... Valve stem.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yutaka Kato 1200 Manda, Hiratsuka-shi, Kanagawa Prefecture, Komatsu Ltd.

Claims (19)

[Claims] An underground excavator, comprising: at least one pair of electrodes for electrocrushing provided on a front surface of the excavator; and a pulse generator for applying a high-voltage pulse to the electrodes (1).
(10), a solution (9) filled around the electrode (1), and a solution provided on the outer peripheral surface of the excavator and surrounding the electrode (1).
(9) Water retention cover (1
4), a solution feed pipe (7) for feeding the solution (9) around the electrode (1), and a solution (9) on the front surface of the excavator via the solution feed pipe (7). Pump (6) for supplying the solution, and the solution (9) is stored, and the solution is stored by the pump (6).
And a storage tank (5) capable of sucking up (9).
(1) An underground excavator characterized by excavating underground by discharging with a high voltage pulse. 2. An underground excavator, comprising: at least one pair of electrodes for electrocrushing provided on a front surface of the excavator; and a pulse generator for applying a high-voltage pulse to the electrodes (1).
(10), a solution (9) filled around the electrode (1), and a solution provided around the electrode (1) and surrounding the electrode (1).
(9) Case for holding water between the front of the excavator and the ground (19)
And a solution feeding pipe (7) for feeding the solution (9) around the electrode (1); and supplying the solution (9) to the front surface of the excavator via the solution feeding pipe (7). Pump (6) and the solution (9) are stored, and the solution is stored by the pump (6).
And a storage tank (5) capable of sucking up (9).
(1) An underground excavator characterized by excavating underground by discharging with a high voltage pulse. 3. The underground excavator according to claim 1, wherein said at least one pair of electrodes (1) has an outer peripheral electrode having a shape similar to a shape of a hole to be excavated; An underground excavator comprising: an inner electrode disposed in a central portion. 4. The underground machine according to claim 1, wherein the solution (9) fills the periphery of the electrode (1).
An underground excavator characterized by being provided with a water retention material (18) for retaining water. 5. The underground excavator according to claim 1, further comprising a continuous discharging mechanism for continuously discharging soil and the like crushed and excavated by the electrode (1). Underground excavator featured. 6. The underground excavator according to claim 2, wherein the case (19) has a positive electrode (2) or a negative electrode (3) of at least one pair of electrodes (1) among the electrodes (1). An underground excavator comprising one of the following. 7. A movable lower traveling body, a vehicle body provided on the lower traveling body, a work machine arm provided at an end of the vehicle body to be movable up and down, left and right, and back and forth. An excavator having a working machine provided at a tip end of a machine arm, wherein at least one pair of electrodes (1) for electro-crushing provided on a front surface of the working machine, Pulse generator for applying voltage pulse
(10), a solution (9) charged around the electrode (1), and water retention of the solution (9) around the electrode (1) between the front surface of the working machine and an object to be excavated. A case (19) provided around the electrode (1), a solution feed pipe (7) for feeding the solution (9) around the electrode (1), and the solution feed pipe. A pump (6) for supplying a solution (9) to the front of the excavator via the
And a storage tank (5) capable of sucking up (9).
(1) An excavator characterized in that an excavation target is excavated by discharging with a high voltage pulse. 8. The excavator according to claim 7, wherein the electrode (1) of the working machine is tiltable with respect to the vehicle body. 9. The excavator according to claim 7, wherein the case (19) includes a member that can expand and contract in the longitudinal direction of the electrode (1). 10. An excavator having an excavator, wherein at least one pair of electrodes (1) for electro-crushing provided at the tip of the excavator, and a high-voltage pulse is applied to the electrodes (1). Pulse generator to apply
(10), a solution (9) filled around the electrode (1), a solution feed pipe (7) for feeding the solution (9) around the electrode (1), and the solution A pump (6) for supplying a solution (9) to the tip of the working machine for excavation via a feed pipe (7), and a sediment crushed by electric discharge at the electrode (1) to the solution (9). And an excavating means for extracting and excavating the excavated object by discharging the electrode (1) with a high-voltage pulse. 11. The excavator according to claim 10, wherein
Wherein the at least one pair of electrodes (1) comprises an outer peripheral electrode having a shape similar to the shape of a hole to be dug, and an inner electrode disposed at the center of the outer peripheral electrode. Excavator. 12. An upper vehicle body provided on a lower traveling body, a digging work machine for excavating in contact with an object to be excavated, and one end is mounted on the upper vehicle body and the other end is mounted on the upper vehicle. Attached to this excavator, at least rotating,
A work machine arm capable of moving the excavation position of the work machine for excavation by performing bending or stretching, wherein the work machine for excavation has an outer peripheral wall, and a front end of the outer peripheral wall is excavated. When it comes into contact with the object, a storage chamber (7) for storing the crushed material of the object to be excavated in the interior surrounded by the surface of the object to be excavated and the outer peripheral wall.
7), (81), crushing heads (76), (80), (80A), (80B),
(95), (95A), (95B) and the crushing head (76), (80), (80A), (80B), (95), (95A), (95
B) At least one pair of electrodes (1) for electrocrushing provided in the storage chambers (77) and (81) and filling around the electrodes (1) in the storage chambers (77) and (81) Solution (9), a solution feed pipe (7) for supplying the solution (9) to the storage chambers (77), (81), and a storage chamber via the solution feed pipe (7). Solution in (77), (81)
An excavator comprising: a pump (6) for supplying (9); and excavating an object to be excavated by discharging the electrode (1) with a high-voltage pulse. 13. The excavator according to claim 12, wherein the crushed material is disposed in series with a lower portion of the storage chamber (81) and is sequentially stored in the storage chamber (81). At least one or more storage compartments (84) for storing, and at least one movable partition plate (89) for partitioning these storage compartments (84) from the storage compartment (81) or from the upper storage compartment (84), respectively. ), And a movable discharge plate (87) for discharging crushed materials provided in the lowermost storage room (84) of the at least one storage room (84). Machine. 14. The excavator according to claim 12, wherein a screw conveyor type discharge device (90) or a vacuum type discharge device (9) for discharging the crushed material into the storage chamber (81).
An excavator to which 1) is attached. 15. The excavator according to claim 12, wherein the inside of the crushing heads (95), (95A), (95B) is formed in the storage chamber (8).
1) and a front wall (97) separated from the storage chamber (81) to the rear, and the solution feeding pipe formed by the rear of the front wall (97).
Solution chamber (96) for temporarily storing solution (9) supplied from (7)
The crushing heads (95), (95A), and (95B) abut against the object to be excavated.
Or by separating, provided in the front wall (97), communication holes (99), (121, 122) for communicating the solution chamber (96) and the storage chamber (81)
Is opened and closed, and the solution (9) stored in the solution chamber (96) is
An excavator comprising a valve (105) for feeding or stopping the feeding to 1). 16. A method for excavating an excavator by electro-crushing, comprising: generating a discharge by high-voltage energy at an electrode (1); (1) The work machine is moved, and the front end of the crushing head (80) having the electrode (1) therein is brought into contact with an object to be excavated, so that the outer periphery of the crushing head (80) is placed inside the crushing head (80). Forming a storage room (81) surrounded by walls and objects to be excavated. (2) Next, a solution (9) is supplied into the storage room (81) to fill around the electrode (1). (3) A high-voltage pulse is applied to the electrode (1) to discharge and crush the object to be excavated. (4) Next, the crushed material stored in the storage chamber (81) is stored in the storage chamber (81). An excavation method characterized by discharging to the outside of (81). 17. A method for excavating an excavator by electro-crushing, wherein a discharge device is generated by high-voltage energy at an electrode (1), and a work device for excavating an excavation object is provided at a tip of a work device arm by the discharge. (1) The work machine is moved, and the front end of the crushing head (80) having the electrode (1) therein is brought into contact with an object to be excavated, so that the outer periphery of the crushing head (80) is placed inside the crushing head (80). (2) Next, at least one movable partition plate (89) is closed to partition the storage room (81), and at least one or more rooms are formed. Storage room
(84) is formed. (3) Next, the solution (9) is supplied into the storage chamber (81) to form an electrode.
After filling around (1), (4) high voltage pulse is applied to the electrode (1) to discharge and crush the excavated object. (5) Next, the storage room (81) and the next storage The movable partition plate (89) between the storage chamber (84) is opened and crushed material is fed to the storage room (84). (6) Next, the storage room (84) is filled with the crushed material. Then, the movable partition plate (89) is closed, and the crushed material is fed from the storage room (84) to the next storage room (84). (7) Thereafter, the crushed material is sequentially transferred to the next storage room (84). The crushed material is fed and the crushed material is supplied to the lowermost storage room having a movable discharge plate (87).
(8) Next, the excavation method comprises opening the movable discharge plate (87) and discharging the crushed material to the outside. 18. A method for digging an excavator by electro-crushing, comprising: generating a discharge by high-voltage energy at an electrode (1); and providing a work machine for digging an object to be digged at the tip of a work machine arm by the discharge. (1) The work machine is moved, and the front end of the crushing head (80) having the electrode (1) therein is brought into contact with an object to be excavated, so that the outer periphery of the crushing head (80) is placed inside the crushing head (80). Forming a storage room (81) surrounded by walls and objects to be excavated. (2) Next, a solution (9) is supplied into the storage room (81) to fill around the electrode (1). (3) A high-voltage pulse is applied to the electrode (1) to discharge it to crush the object to be excavated. (4) Next, the crushed material that has been crushed and stored in the storage chamber (81) is continuously crushed. An excavation method characterized by discharging to the outside of a storage room (81). 19. A method for excavating an excavator by electro-crushing, comprising: generating a discharge by high-voltage energy on an electrode (1); and providing a working machine for excavating an object to be drilled at the tip of a working machine arm by the discharge. (1) Solution chamber provided inside the crushing head (95)
(9) The solution (9) is supplied into (96). (2) Next, the work machine is moved to bring the front end of the crushing head (80) having the electrode (1) therein into contact with the object to be excavated. To form a storage chamber (81) surrounded by the outer peripheral wall of the crushing head (80) and the object to be excavated. (3) Next, the valve (105) is opened to open the solution chamber ( 96) solution
After supplying (9) into the storage chamber (81) and filling around the electrode (1), (4) applying a high voltage pulse to the electrode (1) to discharge and crush the object to be drilled, (5) Next, the valve (105) is closed, and the crushed
1) An excavation method characterized by discharging the crushed material stored in the outside of the storage room (81).