JPH05106212A - Green cut working method - Google Patents

Abstract

PURPOSE:To enable work for discharging superhigh-pressure water to a concrete surface and chipping off laitance, and work fox collecting the chipped-off laitance and waste water, to be efficiently executed. CONSTITUTION:Between a superhigh-pressure water discharging nozzle 55 and a concrete surface C, a block space 97 is set with a housing 91 and rubber plates 92. In the internal section of the block space 97, from the superhigh- pressure water discharging nozzle 55, superhigh-pressure water is discharged to the concrete surface C, and laitance is chipped off. Besides, the chipped-off laitance and waste water are sucked up from the suction port 95 of the block space 97, and are collected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a green cutting method.

[0002]

2. Description of the Related Art When constructing a dam, the seam processing work for removing the leitance of the concrete surface, that is, the green cutting work is conventionally performed by rotating a brush and scraping off the concrete surface with this brush. Since the work of mechanical shaving is done, there is a limit to the work efficiency. It is also practiced to hold the ultra-high pressure water injection nozzle by hand and eject ultra-high pressure water from the ultra-high pressure water injection nozzle to scrape off the concrete surface, but there is also a limit to manual work over a wide range of concrete surfaces. is there. Therefore, it is conceivable to mount the ultra-high pressure water injection nozzle on the vehicle and perform the green cutting work while the vehicle is running.

[0003]

In this case, it is conceivable to perform the work of scraping the leitance, the work of collecting the scraped leitance, and the work of collecting the polluted water separately. In addition to the need for three work vehicles, work time is also long and work efficiency cannot be improved. Furthermore, if the work to scrape off the leitance and the work to collect were performed separately,
It becomes necessary to jet high-pressure water again, and a large amount of water is wasted. The present invention has been devised in view of the above circumstances, and relates to an improvement of the previous application (Japanese Patent Application No. Hei 2-253892), and an object of the present invention is to scrape off the laitance and scrape off. It is an object of the present invention to provide a green cut work method capable of simultaneously performing the work of recovering the leitance and the polluted water by one work vehicle and increasing the work efficiency of the green cut.

[0004]

In order to achieve the above-mentioned object, the present invention is a green cutting method for jetting super high pressure water from a super high pressure water jet nozzle onto a concrete surface to scrape off leitance. It is characterized in that the scraped relitance is sucked and collected together with the contaminated water in the vicinity of the concrete surface portion where is sprayed. Further, the present invention, a closed space is provided across the ultra-high pressure water injection nozzle and the concrete surface, the ultra-high pressure water is injected from the ultra-high pressure water injection nozzle to the concrete surface in the closed space, The scraped off raitance and polluted water are sucked and collected from the inside of the closed space.

[0005]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a schematic configuration diagram of a green cutting work device. The green-cut work device 1 is made up of three units, an ultra-high pressure water supply unit 3, a work unit 5 and a mud collection unit 7. These three units 3, 5, 7
Are separable. Ultra high pressure water supply unit 3
Is an engine 11, a water supply pump 13, an ultra-high pressure water pump 1
5, a filtration device 17, a water supply tank 19 and the like, and these parts and members are attached to a support frame 21 to form a unit.

The water supply pump 13 and the ultra high pressure water pump 15 are driven by the engine 11, the construction water is supplied to the water supply tank 19 through the filter device 17 by the water supply pump 13, and the water in the water supply tank 19 is the ultra high pressure. Water pump 15
Is delivered via the ultra-high pressure water hose 23. As shown in FIG. 2, the ultra-high pressure water supply unit 3 having such a configuration can be mounted on the unmanned transport vehicle 25 for the ultra-high pressure water supply unit via the support frame 21, and together with the mud collecting unit 7. It can also be installed in other vehicles.

The working unit 5 is movably supported by an automated guided vehicle 29 as shown in a side view of FIG. 3 and a plan view of FIG. The automated guided vehicle 29 includes a first wheel group 31 including two front wheels and two rear wheels, and a second wheel group 33 including two left wheels and two right wheels that can be moved up and down, and travels forward and backward by the first wheel group 31. In addition, by lowering the second wheel group 33, the vehicle laterally travels. Vehicle body 35 of automated guided vehicle 29
Includes a hydraulic oil tank 37, a fuel tank 39, an engine,
A control panel 41, an engine actuation box 43, and an engine muffler 45 are provided, a super-high-pressure water hose 23 winding / unwinding mechanism 49 is provided at a rear portion of the vehicle body 35, and a vacuum hose is provided at an upper portion of the vehicle body 35. A winding / unwinding mechanism 53 of 51 is provided.

Each of the winding and unwinding mechanisms 49 and 53 of the super high pressure water hose 23 and the vacuum hose 51 is a vehicle body 35.
As the hoses 23, 51 are wound or unwound by the power of the engine as they run, the drums 49A, 5
3A is driven to rotate appropriately, and the super high pressure water hose 23 is connected to the super high pressure water hose 57 connected to the jet nozzle 55 side for jetting the super high pressure water at the center of the drum 49A.
The vacuum hose 51 is connected to the vacuum hose 59 connected to the injection nozzle 55 side at the center of the drum 53A.

The injection nozzle 55 is arranged in the front part of the vehicle body 35. More specifically, a lateral movement mechanism 65 including a hydraulic cylinder 61, a lateral guide 63, and the like is provided in the front portion of the vehicle body 35, and a vertical movement mechanism 69 including a ball screw 67 and the like is provided on the lateral movement mechanism 65. The horizontal guide 65 is tiltably connected to the vehicle body by a hydraulic cylinder 71. In addition, the vertical movement mechanism 6
A bogie 75 is connected to the front part of 9 via a joint 73 so as to be capable of rolling and pinching. Dolly 7
5 is supported by four caster wheels 77 and a trolley 75
A gun head 79 is supported by a vertical adjusting mechanism 83 including a hydraulic cylinder 81, and an injection nozzle 55 is supported at the lower end of the gun head 79.
The end of is connected to this gun head 79. These lateral movement mechanism 65, vertical movement mechanism 69, and bogie 7
5. The gun head 79 is arranged in a frame-shaped touch sensor mount 85 with casters attached to the front part of the vehicle body 35.

As shown in FIG. 5, the injection nozzle 55 is projected from the lower surface of the gear case 87 below the gun head 79, and a large number of ejection holes formed of diamond tips are formed on the lower surface of the injection nozzle 55. Of the injection nozzle 5 is transmitted to the gear train in the gear case 87.
The reference numeral 5 ejects ultra-high pressure water from its ejection hole while eccentrically rotating by a gear train. Further, a bellows 89 which is vertically expandable and contractible is vertically provided from the lower surface of the gear case 87 so as to cover the periphery of the injection nozzle 55, the housing 91 is supported by the lower end of the bellows 89, and the side surface of the housing 91 is super wear-resistant. Rubber plate 92
Has been attached. The housing 91 is restricted in its movement in the horizontal direction with respect to the carriage 75 by an appropriate member, and an opening 93 is formed on the upper surface of the housing 91 for spraying the ultra-high pressure water from the spray nozzle 55 onto the concrete surface. In addition, the housing 91 located outside the bellows 89
Suction ports 95 for sucking the latance together with polluted water are provided at both ends of the upper surface of the vehicle in the left-right direction, and the vacuum hoses 59 are connected to the respective suction ports 95. The housing 91 may be supported by the carriage 75 via a mounting piece or the like. The bellows 89, the housing 91 and the rubber plate 92 form a closed space 97 between the concrete surface C and the injection nozzle 55.

As shown in FIG. 1 and FIG. 2, the mud collecting unit 7 includes a vacuum pump 101 for sucking the leitance scraped off by the ultra-high pressure water together with the polluted water through the vacuum hoses 59 and 51. Vacuum pump 1
Engine 103 for driving 01 and vacuum hose 5
The vacuum pump 101 is provided with a mud collecting tank 105 for storing the leitance collected through 9, 51.
The engine 103 and the mud collecting tank 105 are attached to the support frame 107 and are unitized. Mud collection tank 105
The dust inside is collected and discharged to an appropriate place, and the moisture is sent to other places as treated water.

Next, the green cutting work will be described. The jet nozzle 55 is reciprocated laterally by the lateral movement mechanism 65 as the vehicle body 35 travels. Then, ultra-high pressure water is jetted from the jet nozzle 55 to the concrete surface C inside the closed space 97, and the leitance is scraped off. Then, due to the momentum of the polluted water in which the ultra-high pressure water is jetted onto the concrete surface C and bounces back and the vacuum action which acts on the suction port 95, the scraped leitance is efficiently sucked from the suction port 95 together with the polluted water, From inside the housing 91 through the vacuum hoses 59 and 51, the housing 9
1 is sent outside.

Therefore, according to the present embodiment, the scraped relitance is sucked and collected together with the polluted water in the vicinity of the concrete surface portion where the ultra-high pressure water is sprayed. It is possible to effectively carry out the work of collecting the collected latance and the polluted water at the same time. In addition to the vacuum action,
Since the raitance can be recovered by utilizing the momentum of the polluted water in which the ultra-high pressure water is jetted onto the concrete surface C and bounces back, the raitance can be recovered more effectively. Further, in the embodiment, a closed space 97 is provided between the injection nozzle 55 and the concrete surface C, and inside the closed space 97, the injection of the ultra-high pressure water to the concrete surface C and the recovery of the pollutant and the pollutant water are performed. As a result, since it is possible to prevent the scattering of the leitance and the polluted water, it is possible to more effectively utilize the momentum of the polluted water to perform the work of collecting the leitance and the polluted water.

[0014]

As is apparent from the above description, according to the present invention, super high pressure water is jetted from the super high pressure water jet nozzle onto the concrete surface to scrape off the leitance, and at the same time the super high pressure water is jetted. Since the scraped relitance is sucked and collected together with the contaminated water in the vicinity of, the work of scraping the reitance and the work of collecting the scraped reitance and the contaminated water can be performed effectively by one work vehicle at the same time. It is possible to improve the work efficiency of green cut.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a green cutting work device.

FIG. 2 is an explanatory diagram when performing a green cut work.

FIG. 3 is a side view of a work unit.

FIG. 4 is a plan view of a work unit.

FIG. 5 is an enlarged view of an injection nozzle portion.

[Explanation of Codes] 1 Green Cut Working Device 3 Ultra High Pressure Water Supply Unit 5 Working Unit 7 Mud Collection Unit 23,57 Ultra High Pressure Water Hose 51,59 Vacuum Hose 55 Injection Nozzle 91 Housing 92 Rubber Plate

Claims (2)

[Claims] 1. A green cut work method for jetting ultra high pressure water from a super high pressure water jet nozzle onto a concrete surface to scrape off the laitance, which is a relitance scraped off in the vicinity of a concrete surface portion where the super high pressure water is jetted. The green cut work method is characterized in that it is sucked and collected together with the polluted water. 2. A closed space is provided between the ultra high pressure water injection nozzle and the concrete surface, and the ultra high pressure water is injected from the ultra high pressure water injection nozzle to the concrete surface inside the closed space. The green cut work method according to claim 1, wherein the scraped-out leitance and polluted water are sucked and collected from the inside of the closed space.