JP2002088760A - Cutting removal construction method for face of slope, and service car and working machine used for it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a breaking and removal construction method or the like for the face of a slope of mortar, which can conduct works mechanically and has high safety and in which the term of works can be shortened largely. SOLUTION: In the construction method, in which the face of the slope F covered with mortar such as the cut-open or the like of a road is cut and removed, a mortar section is cut successively in size capable of being carried out from the face of the slope F by high-pressure water injected from a high- pressure water injection nozzle and cut mortar is removed by using a service car A with the high-pressure water injection nozzle 3A arranged at the front end of a work arm 1A for the service car A disposed in an extensible manner and a cutter 2 supplying the nozzle with high-pressure water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mechanically cutting and removing mortar covering a cut surface of a road or the like, a work vehicle and a work machine used for the method.

[0002]

2. Description of the Related Art In order to prevent rain or the like from penetrating into the slope and collapsing, the slope of the cut-away portion of the road is covered with a metal net or the like and the surface is covered. It may be covered with mortar.

When the slope having such a configuration is to be redone, it is necessary to cut the previous mortar and the metal net used as the base.

[0004] Conventionally, in the above construction, as in rock climbing, an operator hangs on a rope hanging down from an upper end of a slope, breaks the mortar by hitting the slope with an air chapper or a hammer, and sequentially falls down. Let me
It was performed by a so-called "human-marine tactical construction method", such as cutting a metal net underneath with a cutter or the like.

[0005] In such a construction method, since the weight of the worker is supported by the rope, it is a dangerous work for the worker, and the work cannot be performed in a state where the body is sufficiently stabilized. The work efficiency is low and the work is very tired for the worker. Also, the work itself,
If only one worker is working on the slope, despite being solely a human tactical operation, the mortar piece broken by the hammer will be located below the worker on the slope. Since it is falling, other workers cannot be arranged. Therefore, only a small number of workers can be put in at a time, and there is a disadvantage that the construction period must be long.

[0006] Further, since the worker also performs the two operations of hitting with a hammer and cutting the metal net as described above, regardless of the operation and movement in the unstable state as described above, You must always carry at least two tools, an airchapper and a hammer, and a cutter for cutting the line, which reduces work efficiency and
It was to force an increase in fatigue.

[0007] Furthermore, because of the above-mentioned work, it cannot be carried out in rainy weather or the like, and requires a long construction period.

[0008] The present invention has been made in view of such circumstances, and can be mechanically operated and has high safety.
In addition, it is an object of the present invention to provide a method of breaking and removing a mortar slope, which can significantly shorten the construction period, and a work vehicle and a work machine used for the method.

One of the inventors of the present invention has conventionally provided a transport-type high-pressure water washing / cutting apparatus capable of peeling a building surface by high-pressure water or cutting a concrete wall or the like (Japanese Patent No. 2968482). .

[0010]

The slope cutting and removing method according to the first aspect of the present invention is a method for cutting and removing a slope covered with mortar, such as cutting a road, and is capable of expanding and contracting. Using a working vehicle equipped with a high-pressure water injection nozzle arranged at the tip of a working arm of the arranged work vehicle, and a cutting device for supplying high-pressure water to the nozzle, the mortar portion is used as the high-pressure water injection nozzle. Characterized in that the mortar is sequentially cut into a size that can be carried out by high-pressure water jetted from the mortar, and the cut mortar is removed.

[0011] Thus, in the first embodiment constructed as described above,
According to the method of cutting and removing the slope according to the invention of the invention, the worker controls the expansion and contraction of the work arm of the work vehicle, moves the work vehicle, etc., as appropriate, directly or through a remote television device. After the above operation, the high pressure water injected from the high pressure water injection nozzle arranged at the tip of the work arm of the work vehicle can cut not only the mortar part but also the metal net under it, and carry it out. A mortar piece with a net cut into the largest possible size,
If it is lowered using a separately prepared crane or the like, it is possible to work safely and efficiently. Also,
According to the method of the first aspect of the present invention, since the slope is cut using high-pressure water, during the cutting operation, water enters the back of the mortar and the underlying wire mesh from the cut portion. Since the mortar and its underlying wire mesh are promoted to be peeled off from the background, a secondary effect that has not been achieved in the past can be achieved, in which a part of the cut slope can be efficiently removed from the background. Further, according to the method of the first invention, since water is used as the medium, the generation of dust is suppressed even when the cut and a part of the cut slope is collapsed. It is an excellent construction method because it can work while maintaining the environment. Further, since the medium used for cutting is fresh water existing in the natural world, the cutting and removing method is an excellent method in that the work site is not contaminated.

In the method for cutting and removing a slope according to the first aspect of the present invention, if the working machine is configured to be capable of turning a base portion supporting the working arm while expanding and contracting the working arm, This is a preferred embodiment in that the high-pressure water injection nozzle can be directed to an optimum position according to the slope.

The method for cutting and removing a slope according to the second invention is a method for cutting and removing a slope covered with mortar, such as cutting a road, and wires arranged vertically on the slope. Using a working machine equipped with an elevator that freely moves up and down, a high-pressure water injection nozzle that is arranged so that the direction of the elevator can be changed, and a cutting device that supplies high-pressure water to the nozzle, the mortar portion is used. The high pressure water jetted from the high pressure water jet nozzle is used to sequentially cut the mortar into a size that can be carried out, and the cut mortar is removed.

Thus, the present second embodiment constructed as described above
According to the method of cutting and removing the slope according to the invention of the invention, the worker can remotely raise and lower the lift and the direction of the high-pressure water injection nozzle of the work machine, while visually recognizing the work directly or through a remote television device. If operated, the high-pressure water sprayed from the high-pressure water spray nozzle of the working machine can then cut not only the mortar part but also the metal net below it,
It is possible to work safely and efficiently by dropping the mortar pieces, each of which has a net cut into large pieces that can be carried out, by gravity or by using a separately prepared crane or the like. According to the method of the second aspect of the present invention, since the slope is cut using high-pressure water, during the cutting operation, water is applied from the cut portion to the back of the mortar and its underlying wire mesh. It has an unprecedented secondary effect of being able to efficiently infiltrate and remove the mortar and its underlying wire gauze from the ground, so that a part of the cut slope can be efficiently removed from the ground. . Furthermore, according to the method of the second aspect of the present invention, since water is used as the medium, the generation of dust is suppressed even when the cut and a part of the cut slope is collapsed. It is an excellent construction method because it can work while maintaining the environment. Further, since the medium used for cutting is fresh water existing in the natural world, the cutting and removing method is an excellent method in that the work site is not contaminated.

In the method for cutting and removing a slope according to the first and second inventions, the pressure of the high-pressure water is 300 to 500 kg / cm ² , and sludge is mixed in the high-pressure water. If so, the embodiment will be excellent in cutting efficiency.

Further, in the method for cutting and removing a slope according to the first and second aspects of the present invention, the high-pressure water injection nozzle is provided with an ultrasonic vibration device for applying ultrasonic waves to high-pressure water to be injected. The use of such a configuration is preferable in that the cutting ability is greatly improved.

The work vehicle used in the method of cutting and removing the slope according to the third invention is a work vehicle for cutting a slope covered with mortar, such as a road cut-through, and The vehicle has a work vehicle body capable of self-propelled operation, a work arm that is telescopically disposed on the work vehicle body, a high-pressure water injection gun disposed at the tip of the work arm, and a high-pressure water And a cutting device for supplying

Thus, according to the working vehicle of the third invention, it is possible to realize the method of cutting and removing the slope of the first invention.

The working machine used in the method of cutting and removing a slope according to the fourth invention is a working machine for cutting a slope covered with mortar, such as a road cut-through, and The machine is a wire placed on the slope, an elevator that is placed up and down on this wire,
It is characterized by comprising a high-pressure water injection gun whose direction can be changed in the elevator, and a cutting device for supplying high-pressure water to the high-pressure water injection gun arranged in the elevator.

Thus, according to the work vehicle of the fourth invention, it is possible to realize the method of cutting and removing the slope according to the second invention.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for cutting and removing a slope according to an embodiment (example) of the present invention will be described below with reference to the drawings. FIG. 1A is an overall perspective view showing a working vehicle used in a method of cutting and removing a slope according to an embodiment of the present invention, and FIG. 1B is a partially enlarged perspective view of a high-pressure water injection portion (gun portion) at the tip. is there. In FIG. 1, reference numeral 1 denotes an endless track type work vehicle main body, 2 denotes a cutting device mounted on the work vehicle main body 1, and 3 denotes a high-pressure water injection gun having a high-pressure water injection nozzle 3A. The work vehicle main body 1 is provided with a chassis 1B that travels with an endless track mechanism on both sides, a base portion 1D of a vehicle that is turnably disposed on the chassis 1B, and a base 1D on the base 1D. It has a work arm 1A that is configured to be telescopic. This working arm 1A includes a base arm member 1a, an intermediate arm member 1b, and a tip rod member 1c. The intermediate arm member 1b is pivotally attached to the distal end of the base arm member 1a located at the base end, and the intermediate arm member 1b is attached to the distal end of the intermediate arm member 1b with respect to the intermediate arm member 1b. The distal rod member 1c is movably movable in the longitudinal direction of the distal rod member 1c.
Are provided. Then, the base arm member 1a
Is pivotable about a pivot shaft (not shown) in a direction indicated by an arrow R1 by the expansion and contraction operation of the hydraulic cylinder 4. The intermediate arm member 1b is provided with a hydraulic cylinder 5
, The intermediate arm member 1b can swing about the pivot shaft 6 in the direction indicated by the arrow R2 with respect to the base arm member 1a. The distal rod member 1c is slidable in the longitudinal direction of the distal rod member 1c (see an arrow L1 in FIG. 1) by a predetermined distance via the slide mechanism 7 with respect to the intermediate arm member 1b. I have. As a result, the working arm 1A is configured to lie down and expand and contract as a whole.

At the distal end of the distal rod member 1c, the high-pressure water spray gun 3 is disposed so that its distal end can swing up, down, left and right around a base end, that is, three-dimensionally. . The swinging of the high-pressure water injection gun 3 up, down, left, and right can be performed by remote control of the work vehicle main body 1 from the operator room 1R.

The high-pressure water injection gun 3 is flexible (made of pressure-resistant rubber) from the high-pressure water supply port 2a (see FIG. 3) of the cutting device 2 to the connection port of the high-pressure water injection nozzle 3A. High pressure hose 9A and high pressure pipe 9B extend,
The cutting device 2 is configured to supply high-pressure water (or high-pressure water mixed with sludge) to the high-pressure water injection gun 3.

The cutting device 2 has a high-pressure hose 9A as shown in FIG.
An accumulator 45 for accumulating pressurized fresh water and a high-pressure pump 47 for supplying pressurized fresh water are arranged at the base end of the high-pressure water supply port 2a connecting the base end of the high-pressure water supply port 2a. The high-pressure pump 47 is configured to be supplied with fresh water from a fresh water tank 48.
Water is supplied from a water source (for example, a water vehicle) 50 via a filter 49. Further, the cutting device 2 is provided with a sludge tank (not shown), and is configured so that abrasive grains and the like can be mixed into the high-pressure water.

The high-pressure water injection gun 3 has a high-pressure water injection nozzle 3A at its tip, and in this embodiment, a piezoelectric element (not shown) for generating ultrasonic waves is disposed near the high-pressure water passage portion. The piezoelectric element for generating the ultrasonic wave is connected to an oscillating device arranged in the high-pressure water injection gun 3 (or at a separated location), and is supplied with a high-pressure water passing through the high-pressure water injection gun 3 by the supplied electricity. It is configured to apply ultrasonic waves to water. In this embodiment, it is configured so that ultrasonic waves having a frequency of 20 to 60 kHz can be applied.

Then, using the work vehicle having the above-described configuration, the cutting and removing method of the slope is performed as follows. That is, as shown in FIG.
The work arm 1A of the work vehicle A is expanded and contracted as appropriate, and the high-pressure water injection gun 3 disposed at the tip of the work arm 1A is brought close to the slope F. Let it. Specifically, they are brought close to a distance of about 15 to 50 cm. At this time, the high-pressure water injection gun 3
Is desirably close to the slope F in a direction substantially orthogonal to the slope F in order to efficiently destroy the slope F. At this time, the work vehicle A is
It is desirable to position the chassis 1B in the direction so that the vehicle can run in parallel so as to continuously break the slope. When the cutting device 2 is operated in this state,
From the tip of the high-pressure water injection gun 3, high-pressure water mixed with sludge (in this embodiment, about 500 kg / cm ²
High-pressure water) is sprayed onto the slope F, and as a result, the activated and cavitation-producing high-pressure water efficiently cuts the mortar of the slope F and the underlying wire mesh. In this state, when the work vehicle A travels at a low speed along the slope F in accordance with the cutting speed, the slope F can be cut in the traveling direction (see a cutting line C1 in FIG. 2). Next, cutting is continuously performed upward from the cut line on the slope F (see the cut line C1 in FIG. 2) (see the cut line C2 in FIG. 2). In this case, the hydraulic cylinders 4 and 5 are extended to raise the base arm member 1a and the intermediate arm member 1b at the distal end thereof, and the slide mechanism 7
With this, the distal rod member 1c is moved toward the side of the slope F with respect to the intermediate arm member 1b, and the distance between the slope F and the tip of the high-pressure water injection gun 3 is kept constant. This operation may be performed by an operator, or an automatic device may be attached to the work vehicle A so that a fixed distance automatically set can be maintained. Next, when it is necessary to further cut along the cutting line C3 shown in FIG. 2, the work vehicle A is moved backward in the original direction, and the slope F
Is cut as shown by a cutting line C3. Further, when cutting downward from the cutting line C3, the cutting is performed downward from the cutting line on the slope F (see cutting line C3 in FIG. 2) (see cutting line C4 in FIG. 2). In this case, the hydraulic cylinders 4 and 5 are contracted to raise the base arm member 1a and the intermediate arm member 1b at the distal end thereof. While retracting the member 1c from the side of the slope F, an operation is performed to keep the distance between the slope F and the tip of the high-pressure water injection gun 3 constant. In this manner, a part F1 of the slope F having a predetermined area is cut from another part. Before the portion indicated by the cutting line C4 is cut, a crane wire or a wire net (not shown) is hung to suspend a part F1 of the slope F. Is cut off to a predetermined size, and is lowered from the slope F to the ground below by a crane. Further, the operation may be such that the part F1 of the cut slope F is naturally dropped (or forcibly dropped) downward.

When the work site is dangerous, for example, when the slope is a steep slope, the vicinity of the high-pressure water injection gun 3 of the work vehicle A and the driver's seat portion of the work vehicle A, etc. A camera may be installed, and the cutting operation may be performed by remotely operating the work vehicle A wirelessly or the like while visually recognizing a portion of the slope F to be cut by the camera.

As described above, according to the cutting and removing method according to the present invention, since the slope is cut using high-pressure water, the mortar and its underlying metal mesh are cut from the cut portion during the cutting operation. Water penetrates into the back surface of the mortar and promotes peeling of the mortar and its underlying wire mesh from the ground, so that a part F1 of the cut slope F can be efficiently removed from the ground. Has a secondary effect. In addition, since water is used as a medium, the generation of dust is suppressed even when cutting and a part of the cut slope is collapsed, and as a result, the method is excellent in that work can be performed while maintaining a good working environment. Becomes

Further, since the medium used for cutting is fresh water and sludge, this cutting and removing method is an excellent method in that the work site is not contaminated.

By the way, in the above-mentioned embodiment, an example was described in which the work vehicle body was of an endless track type. However, the work vehicle body is not limited to this type, and may be, for example, a tire type. Alternatively, it is needless to say that a roller type may be used. Further, the work vehicle does not need to be physically one vehicle, and may be, for example, a form in which a cutting device or the like is mounted on a towing vehicle or the like.

By the way, instead of the working vehicle, a working machine as shown in FIG. 4 can be used to carry out the cutting and removing method of the slope. That is, the wires W are arranged vertically on the slope. In this case, the wire W is wound around a tree 130 above the slope F, and a weight 120 for tensioning the wire W is suspended below. Then, the lift 100 that can freely move up and down on the wire W is arranged.
The elevator 100 has a winch mechanism therein so that it can move relative to the wire W by a frictional force.
The book 101 is configured so that the distance from the slope F is kept constant by the legs 101 of the book. And this elevator 100
, The high-pressure water injection gun 103 is arranged so that the direction of injection can be freely changed. Although not shown, the direction of the high-pressure water injection gun 103 can be changed, for example, by a table (not shown) rotatable by air pressure or the like, a pneumatic cylinder (not shown), or the like. . Alternatively, the configuration may be such as to be performed by other means. As the high-pressure water injection gun 103 itself, the same one as that of the embodiment shown in FIGS. 1 and 2 in which a piezoelectric element for generating an ultrasonic wave is disposed in the vicinity of a high-pressure water passage portion is used. . The high-pressure water injection gun 1
03 is configured to supply high-pressure water via a hose 105 from a cutting device (not shown) arranged at a position separated from the slope F. The same cutting device as that of the high-pressure water injection gun 103 is the same as that of the first embodiment shown in FIG.

Then, using the working machine having the above-described configuration, the cutting and removing method of the slope is performed as follows. That is, as shown in FIG.
The elevator 100 movably arranged at 20 is brought close to the slope F to be cut and removed, and the slope F and the high-pressure water injection gun 103 are positioned at a predetermined distance. Specifically, the high-pressure water injection gun 103 is maintained at a distance of about 15 to 50 cm from the slope F by the legs 101. At this time, the high-pressure water injection gun 103
Is desirably close to the slope F in a direction substantially orthogonal to the slope F in order to efficiently destroy the slope F. In this state, when the cutting device (not shown) is operated, the high-pressure water mixed with the sludge (in this embodiment, about 500 k
g / cm ² of high-pressure water) is sprayed onto the slope F, so that the activated and cavitation-producing high-pressure water efficiently cuts the mortar of the slope F and the underlying wire mesh. In this state, the elevator 100 is moved up and down along the slope F by moving the elevator with respect to the wire W. At this time, it is desirable that the direction of the high-pressure water injection gun 103 be changed in accordance with the irregularities because the slope F is not necessarily a constant inclined surface, that is, an inclined surface having irregularities. Generally, the movement is performed at a very low speed.

When one cutting is completed, the wire W is changed to another position, and the cutting is performed in the same manner.
By cutting in this manner, the side face F may be cut in the vertical direction, and the mortar therebetween may be peeled off from the side face F.
This peeling may be performed by preparing a crane or the like.

Also, as in the case shown in FIG. 1, a camera is installed on the elevator 100, and the elevator 1 is wirelessly connected with the camera while visually recognizing the portion of the slope F to be cut by the camera.
00 may be configured to perform the above-mentioned cutting operation by remotely operating 00.

In each of the above two embodiments, the pressure of the high-pressure water is about 500 kg / cm ² in any case. However, if it is 300 kg / cm ² or more, it can be used practically. The pressure is appropriately changed depending on the thickness and the like.

[0036]

According to the cutting and removing method according to the present invention,
What used to work tactically in the past is now mechanized,
Moreover, since it is not necessary for the worker to perform the work such as the driving on the slope, the work can be performed without being affected by the weather. Therefore, it is possible to significantly improve work efficiency, improve working conditions, and work environment.

Further, according to the working vehicle of the present invention,
By partially using a conventional work vehicle, the cutting and removing method can be realized at low cost.

According to the working machine of the present invention,
Instead of the work vehicle, the cutting and removing method can be realized at low cost.

[Brief description of the drawings]

FIG. 1A is an overall perspective view showing a working vehicle used in a method of cutting and removing a slope according to an embodiment of the present invention, and FIG.
FIG. 3 is a partially enlarged perspective view of a high-pressure water jet nozzle portion (gun portion) at the tip.

FIG. 2 is a perspective view conceptually showing a state of cutting and removing work of a slope covered with mortar using the work vehicle shown in FIG.

FIG. 3 is a conceptual diagram showing a schematic configuration of a cutting device mounted on the work vehicle shown in FIGS. 1 and 2, together with a high-pressure water injection gun.

FIG. 4 is a perspective view conceptually showing a state of cutting and removing work of a slope covered with mortar by a work machine equipped with an elevator.

[Explanation of symbols]

 A: Work vehicle 1A: Work arm 2: Cutting device 3A: High-pressure injection nozzle F: Slope

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B26F 3/00 B26F 3/00 R S B28D 1/22 B28D 1/22

Claims (7)

[Claims] 1. A method for cutting and removing a slope covered with mortar, such as through a road, comprising: a high-pressure water injection nozzle arranged at a tip of a work arm of a work vehicle which is stretchably arranged; Using a working vehicle equipped with a cutting device that supplies high-pressure water to the nozzle, the mortar portion was sequentially cut into a size that can be carried out by high-pressure water injected from the high-pressure water injection nozzle, and cut. A method of cutting and removing slopes, which comprises removing mortar. 2. The method for cutting and removing a slope according to claim 1, wherein the work vehicle uses a work arm whose base portion that supports the work arm is pivotable as the work arm expands and contracts. 3. A method for cutting and removing a slope covered with mortar, such as through a road, comprising: a lift for freely moving up and down on wires arranged vertically on the slope; Using a working machine equipped with a high-pressure water injection nozzle that is variablely arranged and a cutting device that supplies high-pressure water to this nozzle, the mortar portion is compressed by high-pressure water injected from the high-pressure water injection nozzle. A method of cutting and removing a slope, characterized by sequentially cutting to a size that can be carried out and removing the cut mortar. 4. The pressure of the high-pressure water is 300 to 500 kg.
A / cm ^2, to the high-pressure water, cutting removal method of slope according to any one of claims 1 to 3, characterized in that sludge is mixed. 5. The method according to claim 1, wherein the high-pressure water injection nozzle is provided with an ultrasonic vibration device for applying an ultrasonic wave to the high-pressure water to be injected. The method of cutting and removing the slope is described in the section. 6. A work vehicle for cutting a slope covered with mortar, such as through a road, wherein the work vehicle includes a self-propelled work vehicle main body, and a telescopic work vehicle. A work vehicle comprising: a work arm arbitrarily arranged; a high-pressure water injection gun arranged at a tip of the work arm; and a cutting device for supplying high-pressure water to the high-pressure water injection gun. 7. A working machine for cutting a slope covered with mortar, such as a road cut-through, wherein the working machine is capable of moving up and down on a wire disposed on the slope and on the wire. A lift, a high-pressure water injection gun arranged so that its direction can be changed to the lift, and a cutting device for supplying high-pressure water to the high-pressure water injection gun disposed in the lift. Working machine.