JP2955755B2 - High pressure jet water cutting or drilling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cutting or drilling PIP piles, RC underground continuous walls, footings and other underground obstacles using high-pressure jet water.

[0002]

2. Description of the Related Art Cutting of PIP piles and RC underground continuous walls is to cut steel materials such as reinforced concrete (RC), steel reinforced concrete (SRC), and H-section steel.
As such a cutting method, it is common to use a method called abrasive water jet, in which a high-pressure water mixed with an abrasive is jetted from a nozzle and cut with this jetted water.

[0003] Further, when dismantling or repairing a concrete structure or when digging a rock, for cutting, drilling, and filing of concrete or rock, a water jet nozzle having a fixed turning radius and a fixed spraying angle is turned. The cutting / severing is performed by moving (traversing) in the direction orthogonal to the turning axis, and drilling is performed by moving (forward / backward) in the same direction.

[0004] By the way, in shield construction, while constructing a tunnel with a shield excavator, an obstacle such as a residual pile buried in the ground may be hit, and a cutter bit of the shield excavator and parts of an earth removal device may be damaged. There is a possibility that. It is necessary to remove such obstacles, but obstacles that cannot be removed from the ground will be removed from inside the shield machine. Therefore, the above-described abrasive jet nozzle is arranged in a shield machine, and the one that cuts and removes an object which is an obstacle using the same is conventionally known, for example, Japanese Patent Laid-Open No. 64-62596. Gazette, JP Hei 3-20
No. 2594.

[0005] Japanese Patent Application Laid-Open No. 64-62596 discloses a method in which an abrasive water jet nozzle is provided on the outer periphery of a cutter head, and the cutter head is rotated. Spray water in the direction of obstacles and cut. In addition, the one described in JP-A-3-202594 also attaches an abrasive water jet nozzle to a cutter head, moves it back and forth, turns and moves up and down, and sprays high-pressure water mixed with an abrasive toward a target object. And disconnect.

[0006] The cutting or crushing ability of these high-pressure jet waters depends on the resistance of the jet (fluid or air) around the obstacle (steel such as H-section steel or concrete) 25 to be cut or crushed. Decay due to the decrease in kinetic energy and convergence.

[0007] The distance attenuation of the cutting ability is remarkable in water, and there is almost no cutting force when the distance between the tip of the nozzle and the surface to be cut is 20 cm as shown in FIG.

In the abrasive jet, as shown in FIG. 13, if the object 25 is a solid and solid object, the cutting groove itself of the obstacle 25 acts as a focus nozzle and restrains the jet 26 from a jet (26). Focusing effect) can be obtained, and distance attenuation can be prevented. However, as shown in FIG. 14, when the obstacle 25 cuts the flange portion of the H-section steel in an unconstrained state (a state not wound with concrete), Cutting of the second-stage flange portion becomes difficult due to diffusion of the jet 26.

In order to eliminate such inconvenience, the distance between the tip of the nozzle and the surface to be cut may be kept at a very short distance, for example, 50 mm or less. What is necessary is just to insert it inside the thing 25.

As the insertion type cutting method, there are a method of forming a cutting groove as shown in FIG. 16 and a method of making a hole and making the hole continuous as shown in FIG. In both methods, the nozzle is attached to the rod 24 at a predetermined angle in order to secure a large cutting section.The method shown in FIG. 16 rotates the rod 24 to rotate the nozzle having such an injection angle. Then, the cutting groove 27 is moved in a direction perpendicular to the rotation axis to form a cutting groove 27 having a width equal to or larger than the outer diameter of the nozzle.

On the other hand, in the method shown in FIG. 17, a hole is drilled while cutting the front surface of a rod 24 to which a nozzle is attached as in a normal excavator, and the hole 28 is cut continuously.

In this case, since the method of forming the cutting groove 27 shown in FIG. 16 is to form the cutting groove 27 by reciprocating the rod 24, the cutting groove 27 is partially cut into the cutting groove 27 during cutting. If there is an obstacle, a large bending moment is generated in the rod 24 in the next cutting step, and mechanical problems are likely to occur.

In addition, since the underground obstacle 25 such as a steel material is localized in the moving direction of the nozzle, it is difficult to cut to an even depth.

For this reason, when an insertion type cutting method in which the nozzle is inserted into the object 25 is adopted, a method of making holes as shown in FIG. 17 and continuously cutting the holes is adopted. Often done.

[0015]

When an abrasive jet nozzle is provided in a shield machine, Japanese Unexamined Patent Publication No. 64-62596 discloses, for example, that when cutting an underground pile, the cutter head has a large longitudinal dimension. Even if is rotated, it cannot be cut at once, and it is necessary to change the cutting position and cut again, and the workability is not good.

[0016] Further, in the apparatus disclosed in JP-A-3-202594, when an obstacle appears in front of a shield machine, the surrounding area of the obstacle is excavated before cutting it with an abrasive jet nozzle. It is necessary to expose the portion to be cut, and there is a danger that the worker comes to the face to work. Further, when any of the above-mentioned publications is used for a muddy pressure shield machine, there is a possibility that muddy water may enter the excavator main body from a nozzle mounting portion.

When a method of cutting by continuously drilling holes is adopted as a method of cutting obstacles, the nozzle is inserted into the drilled hole and advanced as described above. Although the tip can be brought closer to the surface to be cut, since the abrasive jet nozzle mixes high-pressure water and abrasive and sprays it,
Since the size of the nozzle unit is large and it is difficult to arrange a plurality of nozzles in the rod 24, as shown in FIG. 24, one nozzle cuts the entire cross section.

For this reason, it is desirable to increase the hole diameter L1 in order to increase the cutting cross section. In this case, the distance between the tip of the nozzle and the surface to be cut (standoff distance L2) increases. There are inconveniences.

On the other hand, the angle of the nozzle is limited to a maximum of about 30 degrees due to its structure, and if an attempt is made to secure a hole diameter L1 of 100 mm at this angle, cutting will be performed with a standoff distance L2 of 100 mm. It is difficult to avoid the attenuation, and it is not easy to cut the H-section steel in water or the like.

In the method of cutting the entire cross section with one nozzle having an inclined injection angle as shown in FIG. 24, the cutting energy is always supplied uniformly to the entire cross section. In the case where a web portion of a certain H-beam is present in the cut cross section in such a manner as to cross the cross section of the rod 24, a large amount of energy is supplied to portions other than the web portion. As described above, since the energy to be supplied is equal regardless of the state of the cutting section, the operation is inefficient.

An object of the present invention is to solve the disadvantages of the prior art, and when installing the shield excavator, it is not necessary for an operator to go to the face to work, and the invention is applied to a mud pressurized shield excavator. It is also effective, it can secure a large cut surface and can efficiently cut or drill obstacles such as piles.
Even if only one nozzle is provided on the rod, the stand-off distance can be shortened to secure a large hole diameter, preventing the occurrence of uncut portions, and cutting and drilling in different patterns can be selected as appropriate. An object of the present invention is to provide a cutting or drilling device using high-pressure jet water that can perform cutting and drilling according to the state of a cutting cross section such as the presence or absence of the material and can efficiently work.

[0022]

In order to achieve the above object, the present invention firstly provides a casing rod with a forward and backward moving mechanism and a rotating mechanism, and the forward and backward freely rotatable casing rod has an injection angle variable mechanism. As a unit, a cutting device using a casing rod provided with an abrasive jet nozzle for injecting high-pressure jet water mixed with abrasives attached with an abrasive is provided as a unit at a cutter head at the tip of a shield excavator, and the casing rod protrudes and retracts. The gist of the invention is that a closing means is provided at the opening of the unit, the closing means comprising an outer pipe through which the casing rod penetrates and a shutoff valve for shutting off the casing rod passage in the outer pipe.

Second, a plurality of units are arranged in parallel in the radial direction of the cutter head at the tip of the shield machine.
In addition, the plurality of units are arranged such that the whole unit is slidably arranged in the radial direction of the cutter head.

According to the first aspect of the present invention, the abrasive jet nozzle can freely move forward and backward, can rotate freely, and the tip can change the injection angle. Therefore, the stand alone nozzle can be used without increasing the number of abrasive jet nozzles. Cutting with a shorter off-distance is possible.In addition, the combination of rotation of the nozzle, rotation of the casing rod, and forward / backward movement makes it possible to uniformly cut each part of the cutting cross section or concentrate on any part of the cutting cross section It is also possible to perform cutting according to the state of the cutting section.

Further, when the casing rod faces a through hole provided in the cutter head of the shield machine, the shut-off valve opens and closes the passage of the outer pipe through which the casing rod penetrates. Since the opening can be completely shut off as a whole, even when used in a muddy pressure shield excavator, muddy water does not enter the shield excavator main body from the opening at the tip where the nozzle projects when not in use.

According to the second aspect of the present invention, in addition to the above operation, a plurality of units are arranged in the cutter head in the radial direction, so that when cutting an obstacle on a face with an abrasive jet nozzle, the cutter head is used. Are simultaneously rotated to increase the sectional area of the cut.

According to the third aspect of the present invention, in addition to the above operation, the plurality of units are slidable in the radial direction of the cutter head, so that the rotation of the cutter head and the sliding of the casing rod in the radial direction. In combination with movement, the nozzle can be placed at any position on the entire cross section of the shield, and a wide range can be cut.

[0028]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a longitudinal sectional side view showing an embodiment of a cutting or drilling device using an abrasive jet according to the present invention. The abrasive jet nozzle 1 is provided at an inner end of a casing rod 2 for guiding so that an injection angle can be changed. A position control device in which the link mechanism 4 is attached by rotatably mounted by the part 3 and the arms 4 a and 4 b are pin-connected to the shaft part 3 as an injection angle variable mechanism, and the link mechanism 4 is fixed inside the casing rod 2. Connect to 5.

The casing rod 2 is rotatably supported by a drum-shaped rotating device 6 installed so as to be wound around the casing rod 2, and the rotating device 6 can be moved forward and backward on a forward-reverse rail 7. A driving device 8 such as a motor for moving the rotating device 6 back and forth is connected to the forward and backward rail 7.

Then, the abrasive jet nozzle 1
High pressure water supply pipe 9 and abrasive supply pipe at the base end
And a supply pipe from a high-pressure pump and a supply pipe from an abrasive supply tank (not shown) through a swivel joint 11 provided at the base end of the casing rod 2. Respectively.

As described above, the abrasive jet nozzle 1 is attached to the casing rod 2 which can move forward and backward and is rotatable, so that the injection angle is variable, and a steel material detection sensor 18 is further provided at the tip of the casing rod 2. A control device using a computer or the like that integrally controls the position control device 5, the rotation device 6, the drive device 8, and the like is provided.

As shown in FIG. 11, a shield excavator 15 for excavating a tunnel or the like is formed by using a cutting device 14 in which an abrasive jet nozzle 1 is swingably provided on a casing rod 2 provided with such a forward and backward moving mechanism and a rotating mechanism. At the tip of the cutter head, a shield 16 that uses electromagnetic waves and the like to detect the obstacle 25 is installed on the head of the shield excavator 15 to cut the obstacle 25 such as the underground residual pile. Set up.

Then, the digging is being performed by the shield digging machine 15 (FIG. 11).
(Refer to (a)), when the detector 16 detects a pile or the like, which is an underground obstacle 25, for example, the detector 16 starts 1 m before the pile position.
Digging at low speed while measuring the position of obstacle 25 with
(B)). If you move forward about 0.3m before the pile,
The position of the pile is measured by extending the detection jack 17 provided on the head of the excavator 15 (see FIG. 11C).

Next, as shown in FIG. 11D, the abrasive jet nozzle 1 of the cutting device 14 using an abrasive jet is used.
Is projected forward of the excavator 15, and the casing rod 2 is rotated and simultaneously moved back and forth to cut the pile. Such cutting is performed at appropriate intervals while moving the cutting device 14 sequentially from below the pile as shown in FIG. 11 (e), and cut and cut at a plurality of places on the pile (FIG. 11 (f) State).

Here, a cutting device using an abrasive jet
A method for cutting a PIP pile or the like, which is an obstacle 25 in the ground or underwater, by using 14 will be further described. As shown in FIG. 2, the basic operation of such a cutting or drilling device is to control the position control device 5 by integrated control by the control device, to operate the link mechanism 4 by the output from the position control device 5, The injection angle of the nozzle 1 is set.

At the same time, the rotating device 6 and the driving device 8 are driven under the control of the control device to rotate the entire casing rod 2 and move back and forth on the forward / reverse rail 7. The rotation and the back and forth movement of the casing rod 2 with respect to the abrasive jet nozzle 1 set at this arbitrary injection angle may be performed simultaneously or in any case, and it is not possible to select any pattern of these combinations. As shown in FIGS. 3 to 8, which will be described later, this is determined based on the state of the cut section of the obstacle 25.

Next, examples of cutting patterns are shown in FIGS.
12 will be described. FIGS. 3 and 4 show the case where each part of the drilling cross section is uniformly cut. First, the abrasive jet nozzle 1 is used.
If the injection angle is set to an arbitrary angle by operating the link mechanism 4 by the position control device 5 and the rotating device 6 is driven to rotate the casing rod 2 while maintaining this angle,
The cutting section 25a is cut in a ring shape.

In this case, by setting the injection angle of the abrasive jet nozzle 1 and the rotation of the casing rod 2,
Since the hole diameter for drilling can be ensured, the tip of the abrasive jet nozzle 1 can be brought close to the cutting surface, the distance attenuation of the cutting ability can be minimized, and uncut portions can be prevented.

When the cutting is performed in the shape of a ring, the injection angle of the abrasive jet nozzle 1 is changed by operating the link mechanism 4 by the position control device 5 so as to be close to the previously cut ring-shaped portion and to be concentric with this. Cut into a ring. If the cutting by changing the angle of the abrasive jet nozzle 1 and the rotation of the casing rod 2 is repeated and the whole is cut concentrically, each part of the cutting section 25a is cut evenly.

If each part is evenly cut concentrically,
The casing rod 2 is advanced on the forward / reverse rail 7, and the cutting section 25a is cut again concentrically at the advanced position in the same manner as described above, and this is repeated. Such a cutting method is effective when applied to a portion that does not particularly require a large cutting ability, such as a concrete portion of a pile.

FIGS. 5 and 6 show a case where the steel material 12 existing inside the pile is cut. When the flange surface of, for example, an H-shaped steel is orthogonal to the drilling axis as the steel material 12, almost the entire cutting section 25a is cut. The flange surface of the H-section steel will be located. In such a case, for example, while the injection angle of the abrasive jet nozzle 1 and the rotation angle of the casing rod 2 are comprehensively adjusted by the control device so that the cutting trajectory is linear,
At the same time, the casing rod 2 is rotated while changing the injection angle of the abrasive jet nozzle 1, so that the flange surface is cut in a vertical and horizontal cross shape, and the periphery thereof is cut in a ring shape.

If the flange surface is divided and cut by a combination of such a straight cross-shaped cut and a ring-shaped cut around the cut, even a steel material 12 requiring a large energy for cutting can be easily cut.

FIG. 7 and FIG. 8 show the steel material also existing inside the pile.
In the case of cutting the steel material 12, when the flange surface of the H-shaped steel is parallel to the drilling axis as the steel material 12, the area of the steel material 12 facing the cutting section 25a is small, but the depth at which the drilling is required Is big.

In such a case, similarly to the above, while controlling the injection angle of the abrasive jet nozzle 1 and the rotation angle of the casing rod 2 comprehensively by the control device so that the cutting trajectory is linear, the abrasive jet is controlled. Nozzle 1
While simultaneously changing the injection angle of the casing rod 2
Is rotated to cut linearly along the flange surface, and further, the jetting angle of the abrasive jet nozzle 1 is changed to cut the position adjacent to the linear cutting portion linearly.

Then, the driving device 8 is driven to advance the casing rod 2 on the forward / backward moving rail 7 to increase the cutting depth, while performing such linear cutting in parallel to cut the flange portion. Partially focused. Therefore, also in this case, it is possible to easily cut the steel material 12 which requires a large energy for cutting.

It should be noted that the cutting pattern may be not only such a straight line in parallel but also a concentric circle as shown in FIG.

When the steel material 12 is present in parallel with the drilling axis, drilling of this portion requires time, so the following method can be considered as the drilling pattern.
FIG. 9 shows a case where the flange portion 12a of the H-shaped steel, which is the steel material 12, which exists in the pile which is the obstacle 25 under the ground, is orthogonal to the axis of the casing rod 2 (see FIG. 9 (a)). FIG.
(B) to (d) as shown in FIG.
Only a is drilled in a straight line, and the drilled holes 13 are cut continuously.

In this state, only the web portion 12b remains, so that the jet angle of the abrasive jet nozzle 1 is inclined at 45 degrees from the casing rod 2 to the web portion 12b as shown in FIG. The web portion 12b is inserted into the hole 13 adjacent to the web portion 12b while being oriented in the direction of the web portion 12b, the abrasive jet nozzle 1 is moved back and forth, and the web portion 12b is cut from the side by this linear movement in the forward and backward movement. (See FIG. 9 (f)).

Incidentally, if the web portion 12b is cut in the same manner as the flange portion 12a, a volume of 450 cc is ground. However, this volume is about 20 times as large as that obtained by simple linear movement. Is inefficient.

On the other hand, in the case of cutting according to the cutting pattern as described above, a cutting time of about 30 minutes per one place for a PIP pile having a diameter of 400 mm and about 25 minutes for an H-section steel alone is sufficient.

FIG. 10 shows a case in which the flange portion 12a of the H-section steel is parallel to the axis of the casing rod 2. In this case, the web portion 12b and the concrete portion are drilled linearly.
And cut in parallel (see FIGS. 10 (a) and 10 (b)),
The flange portion 12a is left at last and the flange portion 12a is
The cutting is performed by the forward and backward movement of the abrasive jet nozzle 1 inclined in the direction of degrees (see FIGS. 10C to 10F).

FIG. 18 shows another example of the case in which the casing rod 2 is disposed on the cutter head 37 of the shield machine, so that the casing rod 2 can be freely moved forward and backward, and can be freely rotated. The mechanism is a hydraulic motor for sliding
A frame 21 is slidably attached in the face direction to a pair of feed screws 20 connected to a casing 19 and connected to the casing 19, and a rear end of the casing rod 2 is rotatably attached to the frame 21. The front end is inserted through an opening packer 35 into an opening formed on the front surface of the casing 19 so as to be able to protrude and retract in the face direction.

The rotatable mechanism is such that a hydraulic motor 23 for rotation is provided on the gantry 21, and a rotary drive shaft of the hydraulic motor 23 is connected to the casing rod 2 via a belt 34.

In the case of FIG. 18 as well, although not shown, a swinging jack is provided in the casing rod 2 so that the abrasive jet nozzle 1 can vary the injection angle of the casing rod 2.
Attached to. The swivel joint provided at the base end of the casing rod 2 is similar to the case of the example shown in FIG.
A supply pipe 9 for high-pressure water and a supply pipe 10 for abrasives disposed in the casing rod 2 are connected to a supply pipe from a high-pressure pump and a supply pipe from an abrasive supply tank via 11 respectively.

An outer tube 39 is disposed at the front position of the casing 19 and at the back of the cutter head 37 so that the vicinity of the distal end of the casing rod 2 penetrates freely.
A shut-off valve 36 for opening and closing the through passage is provided in the middle of the through passage 39. As shown in FIG. 19, for example, a plurality of, in the illustrated example, thirteen pieces of the casing 19 into which the casing rod 2 is inserted are arranged in the cutter head 37 of the shield machine as shown in FIG. The abrasive jet nozzle 1 at the tip of the casing rod 2 protrudes from the head 37 and a long hole 29 extending in the radial direction is formed in each casing rod 2.
Is formed at a position opposed to.

On the other hand, the casings 19 arranged side by side are shown in FIGS.
Connect the adjacent ones as shown in
The casing 30 is connected to a jack 30 disposed at the center of the rear of the cutter head 37 so that all the casings 19 can slide freely in the radial direction of the cutter head 37 at the same time.

Further, on the back surface of the elongated hole 29 from which the abrasive jet nozzle 1 protrudes, a sliding plate 31 for sealing that slides following the abrasive jet nozzle 1 is attached, and a pressure-resistant seal 32 is provided on the sliding plate 31. .

As described above, the casing rod 2 is slidably attached to the cutter head 37 in the cutting face direction and the radial direction, so that the abrasive jet nozzle 1 provided in the casing rod 2 has the length formed in the cutter head 37. The cutter head 37 is rotatably attached to the hole 29 so as to slide in the face direction from the hole 29 and is also rotatable in the circumferential direction of the shaft.

Next, a description will be given of a case where a large number of cutting devices 14 are provided as a unit at the tip of the shield excavator 15 so as to cut an obstacle 25 such as an underground remaining pile. When a pile 16 which is an underground obstacle 25 is detected by the detector 16 while the shield excavator 15 is excavating, the position of the obstacle 25 is measured by the detector 16 at a low speed, for example, 1 m before the pile position. Digging,
Approaching just before the cutter head 37.

Next, the cutting position of the obstacle 25 is determined, the cutter head 37 is rotated, and the jack 30 is operated to slide all the casing rods 2 in the radial direction of the cutter head 37 at the same time. 1 is positioned so as to face the cutting position. Such a cutter head
The combination of the rotation of 37 and the sliding of all the abrasive jet nozzles 1 in the radial direction makes it possible to direct the abrasive jet nozzles 1 to an arbitrary position on almost the entire cross section of the shield machine.

When the shut-off valve 36 is opened and the hydraulic motor 22 is driven to rotate the feed screw 20, the gantry 21 attached thereto is advanced, and the casing rod 2 is advanced in the outer pipe 39, and the abrasive Jet nozzle 1 is the cutter head 37
Facing the elongated hole 29 formed in the hole. In this case, even if the abrasive jet nozzle 1 moves in the radial direction of the cutter head 37 as described above, since the opening facing the tip of the abrasive jet nozzle 1 is formed in the elongated hole 29, the movement can be absorbed.

In this state, if the hydraulic motor 22 is further driven to rotate the feed screw 20, the gantry 21 moves forward, and the tip of the abrasive jet nozzle 1 projects from the elongated hole 29. Muddy water does not enter the cutter frame.

Then, the casing rod 2 is rotated by driving the hydraulic motor 23, and at the same time, the casing rod 2 is moved back and forth, and the abrasive jet nozzle 1 at the tip is rocked to cut the pile. The swing of the abrasive jet nozzle 1 is
It is performed within the range of the elongated hole 29. In this manner, the abrasive jet nozzle 1 slides forward to the depth of the cross-sectional dimension of the obstacle 25 to cut, and then performs the same cutting by slightly shifting the position.

If the obstacle 25 is cut at a predetermined length,
It digs like a normal excavation, and takes in the cut obstacle 25 in the same way as when taking in gravel.

After the cutting, the casing rod 2 is connected to the outer tube 39.
And the abrasive jet nozzle 1 is positioned behind the shut-off valve 36 through the shut-off valve 36.
Close. Do the same for inspections such as hose replacement. Thus, it is possible to prevent muddy water and the like from entering the shield machine 15 from the opening for projecting the abrasive jet nozzle 1 provided in the cutter head 37.

The means for inserting the abrasive jet nozzle 1 into the casing rod 2 is not limited to the structure shown in FIG. 1, but the tip of the abrasive jet nozzle 1 is connected to the ball joint 38 as shown in FIG. , So as to swing freely in any direction.

[0067]

As described above, the cutting or drilling device using high-pressure jet water according to the present invention can be used even when a casing rod provided with an abrasive jet nozzle is used for a muddy pressure shield excavator even when the nozzle is not used. Muddy water does not enter the shield machine from the protruding tip opening,
By the combination of the rotation of the cutter head and the sliding of the plurality of casing rods in the radial direction, the nozzle can be placed at any position on the entire cross section of the shield, and a wide range can be cut.

Further, even when only one nozzle is provided on the rod, the standoff distance can be shortened and a large hole diameter can be secured by combining the setting of the injection angle of the nozzle and the rotation of the rod, thereby preventing the occurrence of uncut portions. In addition, cutting and drilling in different patterns can be appropriately selected by appropriately combining the nozzle angle, rod rotation and back and forth movement, traversing, and cutting corresponding to the state of the cutting cross section such as the presence or absence of steel material etc. The hole can be drilled and work can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a first embodiment of a cutting or drilling device using high-pressure jet water of the present invention.

FIG. 2 is a vertical sectional side view showing a basic operation of a cutting or drilling method using a cutting or drilling device using high-pressure jet water of the present invention.

FIG. 3 is a vertical sectional front view showing a first example of a cutting or drilling method using a cutting or drilling device using high-pressure jet water of the present invention.

FIG. 4 is a plan view showing a first example of a cutting or drilling method using a cutting or drilling device using high-pressure jet water of the present invention.

FIG. 5 is a longitudinal sectional front view showing a second example of a cutting or drilling method using a cutting or drilling device using high-pressure jet water of the present invention.

FIG. 6 is a plan view showing a second example of a cutting or drilling method using a cutting or drilling device using high-pressure jet water of the present invention.

FIG. 7 is a longitudinal sectional front view showing a third example of a cutting or drilling method using a cutting or drilling device using high-pressure jet water of the present invention.

FIG. 8 is a plan view showing a third example of a cutting or drilling method using a cutting or drilling device using high-pressure jet water of the present invention.

FIG. 9 is a cross-sectional plan view showing a fourth example of a cutting or drilling method using the cutting or drilling device using high-pressure jet water of the present invention.

FIG. 10 is a cross-sectional plan view showing a fifth example of a cutting or drilling method using the cutting or drilling device using high-pressure jet water of the present invention.

FIG. 11 is a vertical sectional side view showing a sixth example of the cutting or drilling method according to the first embodiment of the cutting or drilling device using high-pressure jet water of the present invention.

FIG. 12 is a vertical sectional side view showing a seventh example of a cutting or drilling method using a cutting or drilling device using high-pressure jet water of the present invention.

FIG. 13 is a vertical sectional front view showing a cutting state using high-pressure jet water or a cutting state using a drilling device.

FIG. 14 is a vertical cross-sectional front view showing another cutting state using high-pressure jet water or a drilling device.

FIG. 15 is a characteristic curve diagram showing a distance attenuation of a cutting ability of cutting by high-pressure jet water or cutting using a drilling device.

FIG. 16 is a perspective view of cutting with high pressure jet water or groove cutting using a drilling device.

FIG. 17 is a perspective view of continuous drilling using a cutting or drilling device with high-pressure jet water.

FIG. 18 is a vertical sectional side view showing a second embodiment of a cutting or drilling device using high-pressure jet water of the present invention.

FIG. 19 is a front view of a cutter head showing a second embodiment of the cutting or drilling device using high-pressure jet water of the present invention.

FIG. 20 is a vertical sectional front view of a cutter head showing a second embodiment of the cutting or drilling device using high-pressure jet water of the present invention.

FIG. 21 is a vertical sectional side view of a cutter head portion showing a second embodiment of a cutting or drilling device using high-pressure jet water of the present invention.

FIG. 22 is a front view of a main part of a cutter head showing a second embodiment of the cutting or drilling device using high-pressure jet water of the present invention.

FIG. 23 is a vertical sectional side view showing another example of insertion of an abrasive jet nozzle of the cutting or drilling device using high-pressure jet water of the present invention.

FIG. 24 is a longitudinal side view of a conventional drilling or drilling device using an abrasive jet.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Abrasive jet nozzle 2 ... Casing rod 3 ... Shaft 4 ... Link mechanism 4a, 4b ... Arm 5 ... Position control device 6 ... Rotating device 7 ... Forward / reverse rail 8 ... Drive device 9 ... Supply pipe 10 ... Supply pipe 11 ... Swivel joint 12 ... Steel material 12a ... Flange part 12b ... Web part 13 ... Drilling hole 14 ... Cutting device 15 ... Shield excavator 16 ... Detector 17 ... Detection jack 18 ... Steel detection sensor 19 ... Casing 20 ... Feed screw 21 ... Stand 22 ... Hydraulic motor 23 ... Hydraulic motor 24 ... Rod 25 ... Obstacle 25a ... Cutting cross section 26 ... Jet 27 ... Cutting groove 28 ... Hole 29 ... Long hole 30 ... Jack 31 ... Sliding plate 32 ... Pressure seal 34 ... Belt 35 ... Mouth Packer 36 ... Shutoff valve 37 ... Cutter head 38 ... Ball joint 39 ... Outer tube

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hiroshi Ishimaru 1-3-8 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. Tokyo Branch (72) Inventor Yoshiken Sakamoto 1-3-3 Moto-Akasaka, Minato-ku, Tokyo No. 8 Kashima Construction Co., Ltd., Tokyo Branch (72) Inventor Kenji Shibata 2-9-1-1, Tobita-Shi, Chofu-shi, Tokyo Kashima Construction Co., Ltd.Technical Research Institute (72) Inventor Koji Bandoh 1-3 1-3 Kawasaki Heavy Industries, Ltd.Kobe Head Office (72) Inventor Takeshi Ikeda 1-3-1, Higashi Kawasaki-cho, Chuo-ku, Kobe City, Hyogo Prefecture Kawasaki Heavy Industries, Ltd.Kobe Main Office (72) Inventor Koji Tsujida 3-1-1, Higashi-Kawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries, Ltd. Kobe Plant (72) Inventor: Mutsuhiro Nakazawa Higashi-ku, Kobe-shi, Hyogo 3-1-1 Sakimachi Kawasaki Heavy Industries, Ltd. Kobe Factory (56) References JP-A-6-235290 (JP, A) JP-A-10-121888 (JP, A) JP-A-6-47673 (JP) JP-A-49-133203 (JP, A) JP-A-64-62596 (JP, A) JP-A-3-202594 (JP, A) JP-A-2-19466 (JP, U) 1-143392 (JP, U) Patent 2644643 (JP, B2) Patent 2501112 (JP, B2) Patent 2619723 (JP, B2) Utility model registration 2507296 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶⁾ , DB name) B24C 5/02-5/04 B26F 3/00 B28D 1/00 E21D 9/06 301 E21D 9/08 E02D 9/00

Claims (3)

(57) [Claims] 1. An abrasive jet for jetting high-pressure jet water mixed with an abrasive, wherein a casing rod is provided with a forward / backward moving mechanism and a rotating mechanism, and a forward / backward and rotatable casing rod is provided with a variable jetting angle mechanism. A cutting device using a casing rod provided with a nozzle is provided as a unit, and the unit is provided at a cutter head at the tip of a shield excavator, and an outer pipe through which the casing rod penetrates and an casing inside the outer pipe are provided at an opening of the unit where the casing rod projects. A cutting or drilling device using high-pressure jet water, wherein a closing means comprising a shut-off valve for shutting off a rod passage is provided. 2. The apparatus according to claim 1, wherein a plurality of units are arranged in parallel in a radial direction of a cutter head at a tip of the shield machine. 3. The unit according to claim 1, wherein the plurality of units are entirely slidably arranged in a radial direction of the cutter head.
A cutting or drilling device using high-pressure jet water according to item 1.