JP3103021B2 - Discharge hydraulic pressure breakdown method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge pressure for destroying an object to be destroyed having one free surface, for example, a rock, a concrete structure, an underwater rock or a concrete structure in a tunnel or a residential land development site. Related to the destruction method.

[0002]

2. Description of the Related Art An electric energy charged and stored in a capacitor is discharged and supplied to a thin metal wire in a very short time. The liquid pressure destruction method, which destroys the air, does not depend on the ambient temperature or the elapsed time after loading, does not explode unless voltage is applied, and is extremely safe. It is used to destroy concrete structures such as converted buildings.

[0003]

The objects to be destroyed to which the electric discharge hydraulic rupture method is conventionally employed are concrete blocks or the like, all of which are usually free surfaces, and have one free surface such as rock. Not applicable to destroyables.

[0004] It is an object of the present invention to provide a discharge hydraulic fracturing method capable of more effectively destroying an object having one free surface.

[0005]

In order to achieve the above object, the invention according to claim 1 of the present invention provides an electric energy charged and stored in a capacitor to a metal wire in a very short time, so that the metal wire and When the object to be destroyed, which has one free surface, is first formed on the free surface by using a discharge hydraulic pressure destroyer utilizing an impact force generated by rapid vaporization and volume expansion of the surrounding liquid, Be the center of destruction
A plurality of inclined fracture holes are formed along the fracture surface extending outward from the center of the back of the leading groove, and a discharge hydraulic pressure breaker is loaded in each of the fracture holes, and electric energy is discharged from the capacitor to each discharge hole. By simultaneously supplying the hydraulic pressure breaking tool in a short time to discharge-break the object to be destroyed, the preceding groove is cut out to form a second free surface, and a plurality of breaking holes are formed around the preceding groove. In this method, the discharge is destroyed by the discharge hydraulic pressure destroyer loaded in each of the breaking holes, the leading groove is enlarged, and the object to be destroyed is discharged.

[0006] According to the above method, the leading groove of the free surface is formed with oblique fracture holes formed so that the tips cross each other or approach each other along both fracture surfaces extending outward from the center. A discharge hydraulic pressure breaker is loaded in the hole to cause a discharge breakdown, and the leading groove can be effectively cut out to form a second free surface, and then the second free surface can be effectively used. Destruction can be destroyed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a discharge hydraulic pressure breaking method according to the present invention will be described with reference to FIGS.

First, the discharge hydraulic pressure destruction equipment will be described. As shown in FIG. 7, a discharge probe 3 which is a discharge hydraulic pressure breaking tool loaded in an inclined breaking hole or a breaking hole 2 drilled in the object to be broken 1 comprises a breaking liquid 4 made of, for example, water.
A destruction container 5 made of synthetic rubber or waterproof paper filled with
It penetrates through the top plate 5a of the container 5 and extends into the breaking liquid 4,
A large-capacity capacitor 10a, which is composed of a pair of electrode rods 7 held in parallel with each other by a spacer 6 and a thin metal wire 8 connected between the tip ends of the electrode rods 7 and is disposed apart from the object 1 to be destroyed Is connected to the electrode rod 7 by a lead wire 9 having a discharge switch 9a. The energy supply circuit 10 includes a DC high-voltage power supply 10b for charging and accumulating electric energy in a capacitor 10a, and the capacitor 10a and the DC high-voltage power supply 10b are connected to a connection line 1 via a charging switch 10c.
0d are connected to each other.

The relationship between the charging voltage Vc of the capacitor 10a of the energy supply circuit 10 and the discharge impact force F of the discharge probe 3 is in a proportional relationship as shown in a graph showing the F-Vc characteristic in FIG. By the way, as shown in FIG. 8, the state of the breakdown caused by the discharge probe 3 loaded in the vertically formed breakdown hole 2 is different from the width Li of the internal direct breakdown region and the width La of the surface direct breakdown region. The relationship F between the discharge impact force F and the widths Li and La of the direct breakdown region is derived as a proportional relationship between the charging voltage Vc (volts) and the width L (cm) of the direct breakdown region, as shown in FIG. .

| Vc | / 120 ≧ L ≧ | Vc | / 1200... In FIG. 10, both direct destruction regions La on the surface are represented by | Vc | /
120, the internal direct destruction region Li is expressed by the equation | V
c | / 1200.

Next, a first embodiment of the discharge hydraulic pressure breaking method will be described with reference to FIGS. The object 1 to be destroyed by this method has one free surface F1 such as a bedrock, a concrete foundation, and a concrete floor. a. First, as shown in FIG. 1, using a perforation device or the like, two fracture surfaces 11 a inclined from the deep portion of the center of the preceding groove 11 formed on the first free surface F <b> 1 and serving as a fracture center to both outer surfaces. ,
A plurality of inclined breaking holes 12A, 12B whose openings are arranged in a staggered manner in plan view are formed along the cross section along 11b, and the tip portions 12b of the inclined breaking holes 12A, 12B on both sides are respectively formed. Intersecting line P between fracture surfaces 11a and 11b
Is formed to reach.

Here, the base opening 1 of the adjacent inclined breaking holes 12A, 12B formed on the same breaking surfaces 11a, 11b.
A distance XA ₁ between 2a, the distance between the tip 12b XA
₂ is the width L of the direct breakdown region 13 by the discharge probe 3
(Actually La and Li), XA ₁ ≦ 2 × L XA ₂ ≦ 2 × L, that is, each is set to twice or less of L.

The width L of the direct destruction region 13a is
This satisfies the range of the expression. b. The discharge probes 3 are loaded into the inclined breaking holes 12A and 12B, respectively, and the discharge switch 9a is turned on. A high voltage is supplied from the capacitor 10a to all the discharge probes 3 in a very short time and applied to the thin metal wires 8. As a result, the thin metal wire 8 and the breaking liquid 4 around the thin metal wire 8 are instantaneously vaporized, and the impact force is transmitted to the surrounding object 1 to be broken, thereby directly breaking the breaking area 13. Thereby, the preceding groove 11 is hollowed out, and the second free surface F2 is formed.

Here, the opposing destruction surfaces 11a, 11
b, the tip 1 of the inclined breaking holes 12A and 12B closest to each other.
Center distance YB _{2 of} 2b Is set as YB ₂ ≦ 2 × L, as shown in FIG.
Completely destroy the entire open surface of the fracture free surface is one
The preceding groove 11 can be completely broken in the object 1 by electric discharge.

C. Around the leading groove 11, a discharge probe 3
Is formed in accordance with the direct destruction area, and the discharge probe 3 is loaded in the destruction hole, and the object to be destroyed is sequentially or simultaneously destroyed, and the preceding groove 11 is enlarged. Is destroyed.

Next, a second embodiment will be described with reference to FIGS. a. First, as shown in FIG. 3, using a perforation device or the like, two fracture surfaces inclined from the center deep portion of the preceding groove 21 to be formed on the first free surface F1 to both outer surfaces. A plurality of oblique breaking holes 22A and 22B are formed on the cross section at positions facing each other along 21a and 21b.

Here, a distance XB ₁ between the base openings 22 a of the adjacent inclined breaking holes 22 A, 22 B formed on the same breaking surfaces 21 a, 21 b and a distance XB ₂ between the front ends 22 b.
Is defined as XB ₁ ≦ 2 × L XB ₂ ≦ 2 × L, where L is the width of the direct breakdown region 23 due to the discharge probe 3 (actually, La and Li). The distance YB ₂ between the same inclined destroy holes 22A on the cross section, 22B of tip portion 22b, inclined destroy holes 22A, the width L of the direct destroy region 23 by the discharge probe 3 is loaded respectively 22B (actually Li) is They are set so as to be in contact with or overlap with each other, and are set so that the destruction area 23 is directly continuous at the bottom of the preceding groove 21.

[0018] That is, the inclined destroy holes 22A, when the inclination angle with respect to the first free surface F1 of 22B and theta, in the shaded right triangle in Fig. _{5, YB 2/2 ≦ Lcos} (90 ° -θ) ∴ YB 2 × Lcos (90 ° −θ).

As a result, the rupture region 23 is directly continuous at the bottom of the preceding groove 21, and the preceding groove 21 can be hollowed out. If YB ₂ > 2L cos (90 ° −θ),
Since the fracture region 23 is not directly connected at the bottom, the leading groove 2
1 cannot be cut out.

B. The discharge probes 3 are loaded into the inclined breaking holes 22A and 22B, respectively, and the discharge switch 9a is turned on. A high voltage is supplied from the capacitor 10a to all the discharge probes 3 in a very short time and applied to the thin metal wires 8. As a result, the thin metal wire 8 and the surrounding liquid 4 are instantaneously vaporized, and the impact force is transmitted to the surrounding object 1 to be destroyed by discharge in a state where the destroyed area 23 is directly connected. Thus, the inverted trapezoidal leading groove 21 is hollowed out to form the second free surface F2.

[0021]

C. Around the leading groove 21, a discharge probe 3
The fracture hole 1 is formed in accordance with the direct fracture area of
Is charged with the discharge probe 3 and the object to be destroyed is sequentially or simultaneously destroyed, and the preceding groove 21 is enlarged. This is repeated, and the object to be destroyed 1 is destroyed.

In each of the above embodiments, the leading grooves 11, 21
Are linear, but may be curved.

[0024]

As described above, according to the first aspect of the present invention, the leading groove of the free surface is formed so that the tips cross each other or approach each other along both fracture surfaces extending outward from the center. The inclined fracture holes are formed, a discharge hydraulic pressure breaker is loaded in these inclined fracture holes, discharge breakdown occurs, the preceding groove is effectively cut out, and a second free surface can be formed. The object to be destroyed can be effectively destroyed by utilizing the second free surface.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a first embodiment of a discharge hydraulic rupture method according to the present invention.

FIG. 2 is a cross-sectional view of the object to be destroyed.

FIG. 3 is a partially cutaway perspective view showing a second embodiment of the discharge hydraulic pressure breaking method according to the present invention.

FIG. 4 is a cross-sectional view of the object to be destroyed.

FIG. 5 is an explanatory view of a cross section of the object to be destroyed.

FIG. 6 is a perspective view of a preceding groove broken by the discharge hydraulic pressure breaking method.

FIG. 7 is a configuration diagram showing the same electrostatic hydraulic destruction equipment.

FIG. 8 is a cross-sectional view showing a destruction state of an object to be destroyed by the electrostatic hydraulic destruction equipment.

FIG. 9 is a graph showing a relationship between a discharge impact force and a charging voltage in the discharge hydraulic pressure breaking method.

FIG. 10 is a graph showing a relationship between a direct breakdown region and a charging voltage in the discharge hydraulic pressure breakdown method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Destruction object 3 Discharge probe 4 Breaking liquid 8 Thin metal wire 10 Energy supply circuit 11, 21 Leading groove 12A, 12B, 22A, 22B Inclined breaking hole 13, 23 Direct breaking region L Direct breaking region width Vc Charging voltage F1 1 free surface F2 2nd free surface

Continuation of the front page (56) References JP-A-7-145698 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E21C 37/18 F42D 1/045-1/06 F42D 3 / 04 E04G 23/00-23/08 B26F 3/00 B28D 1/00-7/04

Claims (4)

(57) [Claims] A discharge pressure utilizing an impact force generated by rapid vaporization and volume expansion of a thin metal wire and its surroundings by supplying electric energy charged and stored in a capacitor to the thin metal wire in a very short time. When using a breaking tool to break an object to be destroyed having one free surface, first, along the breaking surface that extends outward from the center of the back of the preceding groove that is formed on the free surface and becomes the breaking center , An inclined fracture hole is formed at a plurality of locations, and a discharge hydraulic pressure destroyer is loaded into each of the fracture holes, and electric energy is simultaneously supplied from a capacitor to each discharge hydraulic pressure destroyer in a short time to discharge-break the object to be destroyed. As a result, a second free surface is formed by hollowing out the preceding groove, a plurality of breaking holes are formed around the preceding groove, and the discharge is destroyed by the discharge hydraulic pressure breaker loaded in each breaking hole. To expand the leading groove A discharge hydraulic pressure destruction method characterized in that an object to be destroyed is discharged. 2. The opening of the plurality of inclined breaking holes is broken in plan view.
Are arranged in a zigzag pattern along the plane, and formed so that the tips of the inclined fracture holes on both sides reach the intersection line of the fracture plane, and the distance X between the openings of adjacent inclined fracture holes on the same fracture plane
And A _1, the distance XA ₂ between the tip portion of the inclined destroy holes, and the width of the direct destroy region due to discharge pressure destroying tool is L, there XA ₁ ≦ 2 × L, the range of XA ₂ ≦ ₂ × L And the distance between the openings of adjacent inclined fracture holes between the fracture surfaces
_{2. The} method according to claim 1 , wherein Y ₂ is in the range of Y ₂ ≦ 2 × L. 3. A plurality of oblique fracture holes are formed at positions facing each other along a fracture surface, a distance XB ₁ between base openings of adjacent oblique fracture holes on the same fracture surface, and The distance XB ₂ between the tips is in the range of XB ₁ ≦ 2 × L and XB ₂ ≦ 2 × L, where L is the width of the direct breaking area by the discharge hydraulic pressure breaking tool. distance YB ₂ between parts, when the inclination angle of the inclined destroy holes with respect to the first free surface and theta, according to claim 1, characterized in that the range of _{YB 2 ≦ 2 × Lcos (90} ° -θ) Discharge hydraulic breakdown method. Assuming that the charging voltage of the capacitor supplied to the discharge hydraulic pressure destroyer is Vc (volt), the width L (cm) of the direct breakdown region is: | Vc | / 120 ≧ L ≧ | Vc | / 1200 The method according to claim 2 or 3, wherein the method is in the range of: