JP2007283183A - Construction method based on water-bubble jet and construction system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a contruction method and construction system which arehighly efficient, achieve sufficient constructing effects and allow construction with relatively small and simple machinery, in e.g. cleaning, trimming, cutting, crushing, boring and/or removing various types of materials, e.g. concrete, mortal, soil, rocks and white lines on the road, by using a water-bubble jet. <P>SOLUTION: Micro-bubble water containing fine bubbles of diameters of 10-50 μm is produced with a water pump 3, an air compressor 4 and a bubble generator 5, or high-pressure water produced with a water supply tank 1 and an ultra-high pump unit 2 and micro-bubble water are sprayed from a spray nozzle device to form a water-bubble jet. The micro-bubble water or water-bubble jet is sprayed on an object material, e.g. concrete, soil or rock to carry out a treatment, e.g. cleaning, trimming, cutting, crushing, boring and/or removal of white lines on the road. The shock waves of the water jet and the destructive power due to cavitation of bubbles lead to an efficient treatment. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  In the present invention, a water-bubble jet using microbubble water containing bubbles having a particle size of a micro particle size of the order of μm is sprayed on an object to be processed such as concrete, mortar, soil, rock, and the like. The present invention relates to a construction method and construction system using a water-foam jet that performs processing such as cutting, crushing, and drilling.

  Water jets (water jets) are widely used in the fields of resources, construction, nuclear power, medicine, etc., for cleaning, suspending, cutting, and crushing concrete, soil, rocks, steel, and various materials, and have achieved results. However, when the construction object is groundwater or a part thereof is submerged, the construction efficiency is remarkably reduced.

  Therefore, in order to improve this disadvantage, a method of injecting an air jet together with the water jet from the vicinity of the outlet of the water jet nozzle has been adopted, and the intended purpose has been achieved to some extent. However, in this case as well, since the bubble diameter is large, it quickly rises and disappears, so that there are disadvantages that a sufficient construction effect cannot be obtained, the construction machine device becomes large, and the construction initial fee increases. is there.

  Moreover, as a prior art regarding the microbubble relevant to this invention, there exist patent documents 1-3, for example. The invention of Patent Document 1 is a method and apparatus for generating microbubbles, in which a gas supply pipe is arranged in a main body pipe arranged in a liquid, and a negative pressure generated in the main body pipe is used to generate gas from the gas supply pipe. Is introduced into the main pipe, gas and liquid are mixed in the main pipe, and then collided with a plate disposed on the downstream side in the main pipe to generate microbubbles. It is described that it can be used to purify water in closed water areas, purify domestic wastewater, reduce the amount of detergent due to cleaning effects, keep warm when bathing using pressure waves when microbubbles collapse, and reduce fluid resistance of water and underwater transport equipment. ing.

  The invention of Patent Document 2 is a method and apparatus for using nanobubbles, and in order to further enhance the function of microbubbles, it uses nanobubbles with a diameter of the order of nanometers, adsorbs dirt components, provides a high-speed cleaning function for object surfaces, and sterilizes Various functions can wash various objects with high functionality and low environmental load, can purify polluted water, and can be applied to living bodies to recover from fatigue and can be used effectively for chemical reactions. Are listed.

  The invention of Patent Document 3 is a swirling microbubble generator that generates microbubbles having a diameter of 20 μm or less on an industrial scale. A space such as a bottomed cylinder is provided in the apparatus container, and a part of the inner wall circumferential surface is provided. A pressurized liquid inlet in the tangential direction, a gas inlet in the center of the bottom of the cylindrical space, a swirling gas-liquid mixture outlet near the tip of the cylindrical space, The swirl gas cavity is continuously and stably cut by generating a large swirl speed difference, and as a result, a large amount of fine bubbles are generated near the outlet, It is released into the liquid. Effectively used for water purification of ponds, lakes, dams, rivers, etc., sewage treatment by microorganisms, aquaculture of fish and aquatic animals, etc. It is described.

JP 2005-334869 A JP 2004-121962 A WO00 / 69550

  As described above, when a method of jetting an air jet together with a water jet from the vicinity of the outlet of a water jet nozzle is used for cleaning, hanging, cutting, crushing, etc. of various materials such as concrete, soil, and rock, Since the diameter is large, it rises quickly and disappears, so that there are problems such that a sufficient construction effect cannot be obtained, the construction machinery becomes large, and the construction initial fee increases.

  The present invention provides a high-efficiency and sufficient construction effect when performing processing such as washing, suspending, cutting, crushing and drilling of various materials such as concrete, mortar, soil and rock using a water-foam jet. Another object of the present invention is to provide a construction method and construction system using a water-foam jet that can be constructed by a relatively small and simple mechanical device.

  The principle of the present invention will be described. For example, in concrete cleaning and seismic reinforcement of concrete structures, high-speed water jets are used to scrape the deteriorated parts of the concrete surface and place new concrete. In these constructions, that is, cleaning or concrete surface shaving, it is necessary to efficiently remove only the deteriorated portion. In the past, construction was carried out using only a water jet or a combination of a water jet and an air jet, but the present invention utilizes a water-bubble jet produced by microbubble water. In this water-bubble jet, a high pressure wave is generated by the occurrence of cavitation, and the force of the water jet and cavitation is greatly involved. The mechanism of cavitation generation and the utility of cavitation are described below.

(1) Occurrence of cavitation Cavitation is one of the phenomena exhibited by bubbles. Originally, it causes problems such as the occurrence of corrosion due to damage to blades that rotate at high speed in water, such as water turbines and ship screws. There are many. When the blades are rotated at high speed in water, the low pressure part is generated by Bernoulli's theorem. When this pressure is lower than the saturated water vapor pressure, steam is generated when there are nuclei that form bubbles, and at the same time, gas dissolved in water is separated and becomes gas around the nuclei, and bubbles are formed around the nuclei. Artificially creating such bubbles, the amount of energy released when a stably formed bubble collapses for some reason is the energy that has stably formed the bubble, regardless of the presence or absence of nuclei. A large shock wave is generated by being released all at once.

(2) Utility of cavitation The effect of cavitation can be clearly seen in the case of ultrasonic cleaning. The size of dust that can be removed with conventional detergents is limited to a few microns, whereas ultrasonic waves are said to be able to remove up to 0.1 microns. Thus, there is a marked difference in cleaning power. Such ultrasonic cleaning has two important effects. One is cavitation, and the other is physical and chemical reaction promoting effect. In the former cavitation, micro bubbles are generated in the cleaning liquid, and a strong shock wave is generated each time the bubbles disappear. When the bubbles disappear, the pressure inside the bubbles reaches 100 MPa in the pure case. Therefore, the mechanical force generated when the bubbles are destroyed is extremely large. This mechanical force, together with the shock waves inherent in the water jet, is useful for cleaning concrete and removing degraded concrete from the surface. Another physical / chemical reaction promotion is considered to be negligible because it is extremely small compared to the cavitation effect.

  According to the first aspect of the present invention, microbubble water containing bubbles having a particle size of 50 μm or less, or a water-bubble jet composed of water and microbubble water is treated with concrete, mortar, soil, rock or the like. It is a construction method using a water-foam jet characterized by spraying onto an object and performing processing such as washing, suspending, cutting, crushing, drilling, or white line erasing on a road.

  Microbubble water is water containing bubbles with a particle size of 10 to 50 μm, and (i) high-speed rotation of stirring blades, (ii) air from porous pores such as sintered metal It can be generated by jetting, (iii) collision of water jets with protrusions, (iv) introduction of air into a pressure sudden change part, and tearing. It can be used for cleaning concrete, mortar, etc., picking, cutting, or cutting and crushing soil and rocks, and drilling concrete.

  The invention according to claim 2 of the present invention is the construction method according to claim 1, wherein the bubble diameter of the microbubble water is 10 μm to 50 μm.

  Microbubbles less than 10 μm (a) do not cause bubbles to coalesce or absorb, remain in a single gas for a long time, have a relatively long life, and (b) have a very slow ascent rate (2 per hour) -3m), it has excellent horizontal diffusibility, (c) stays in water for a long time, and has a large cell surface area per unit volume, so that it is easily dissolved in water. Therefore, microbubble water of about 10 μm to 50 μm is preferable. Since nanobubbles having a diameter of the order of nm cannot be expected to have a cavitation effect, the bubbles preferably have a particle size of 10 μm or more.

  According to a third aspect of the present invention, in the construction method according to the first or second aspect, a water-bubble jet is obtained by spraying water and microbubble water from a spray nozzle device. It is a construction method using a characteristic water-bubble jet. For example, as shown in FIGS. 2 (b) to 2 (e), high pressure water and separately generated micro bubble water are separately supplied to the injection nozzle device, and construction is performed by a high pressure water jet and a micro bubble water jet. I do.

  According to a fourth aspect of the present invention, in the construction method according to the first or second aspect, the water-foam jet is obtained by spraying microbubble water from the spray nozzle device. -A construction method using a bubble jet. For example, as shown to Fig.2 (a), the produced | generated micro bubble water is sent to an injection nozzle apparatus with a pump from a water storage tank, and micro bubble water is directly injected from an injection nozzle apparatus.

  The invention of claim 5 of the present invention is a construction using a water-foam jet that performs a treatment such as washing, suspension, or white line elimination on a road by injecting a water-foam jet onto an object to be treated such as concrete or mortar. A construction apparatus comprising an injection nozzle device for injecting microbubble water containing bubbles having a particle size of about 10 μm to 50 μm, or a water-bubble jet composed of water and microbubble water, A water-bubble jet characterized by having a micro-bubble water or a water-bubble jet supply system for supplying water and micro-bubble water to the spray nozzle device and a slurry recovery system for recovering slurry in the construction apparatus was used. It is a construction system.

  For example, in the construction system shown in FIG. 1, a water-foam jet supply system is composed of a water supply tank, an ultra-high pressure pump unit, etc. (water jet system) and a water pump / compressor / mixer, etc. (foam jet system). A slurry recovery system consists of a recovery tank and a water storage tank. Alternatively, as shown in FIG. 6, a water-bubble jet supply system is configured by a fresh water tank and a high-pressure water pump, and a slurry recovery system is configured by a blower, a receiver tank, a suction pump, and the like. In order to improve the construction efficiency, it is preferable to attach a construction device such as a washing / hanger to the rear part of the vehicle and mount the system equipment on the loading platform. As a specific example, the present invention is applied to, for example, road cleaning, fishing for road repair / reinforcement, road white line erasing, and the like.

  A sixth aspect of the present invention is the construction system according to the fifth aspect, wherein the construction device is a rotary jet system in which a plurality of injection nozzle devices are rotated around a rotation axis and the rotation shaft is moved. It is a construction system using a water-bubble jet characterized by

  A seventh aspect of the present invention is the construction system according to the fifth aspect, characterized in that the construction device is a swing jet system that swings and moves the injection nozzle device in a direction perpendicular to the movement direction. It is a construction system using water-bubble jet.

  For example, as shown in FIG. 4, it is a rotary jet system that draws a movement trajectory in which the circle sequentially shifts on the injection nozzle device, or a swing jet system that draws a motion trajectory having an acute waveform, and the construction device is attached to a vehicle or the like. Then, it is moved in the direction perpendicular to the moving direction of the movement locus to perform washing or suspending.

  Invention of Claim 8 of this invention is a construction system using the water-foam jet which injects a water-foam jet into processing objects, such as concrete, mortar, soil, or a rock, and performs processing, such as a piercing | boring. A drilling machine equipped with a jet nozzle device at the tip of a rod for jetting microbubble water containing bubbles having a particle size of about 10 μm to 50 μm, or a water-bubble jet composed of water and microbubble water; Water-foam characterized by having a micro-bubble water or a water-foam jet supply system for supplying water and micro-bubble water to the spray nozzle device, and a water supply system for excavating shear discharge for supplying water to a rod of a drilling machine It is a construction system using a jet.

  For example, in the construction system shown in FIG. 7, a water-foam jet supply system is composed of a water tank, an ultra-high pressure pump, etc. (high pressure water generation line) and a pump / mixer, etc. (bubble generation line). A water supply system for shear discharge is constructed. For example, as shown in FIG. 8, in the drilling machine, at least two water-foam jet nozzle devices are arranged in the lower end of a rotationally driven rod instead of a bit, and the jets have holes at the directivity angles. Set to concentrate on one point on the inner wall and drill with microbubble water or high pressure water and microbubble water. As specific examples, for example, drilling of a ground anchor, drilling for fixing an iron plate for seismic reinforcement of a concrete structure, drilling for fixing anchors such as a tower-like structure or an outer wall coming out of a building, It is used for drilling for anchors such as retaining walls and sheet piles, drilling for holes for installing heat exchangers using shallow underground heat, ground improvement, and driving piles.

  Since the present invention is configured as described above, the following effects can be obtained.

  (1) The water-bubble jet generated by micro-bubble water injects the water jet and the micro-bubble, so the effective range of the water jet in water is longer than that in water (see Fig. 3). ), The perforation speed in water is improved, and the microbubbles do not rise and disappear as fast as general large bubbles, and the bubble usage time is long and the bubble cavitation effect should be fully utilized. It is possible to reliably provide a high efficiency and sufficient construction effect in the treatment of various materials such as concrete, mortar, soil, rock, etc., such as washing, suspending, cutting, crushing and drilling.

  (2) Not only for use in water, but also in air construction without groundwater etc., high-efficiency and sufficient construction effect due to bubble cavitation effect, that is, generation of high-pressure water in a minute range accompanying microbubble destruction Can definitely be mentioned.

  (3) Microbubble water can be generated relatively easily, and existing machinery can be diverted. Construction can be performed with relatively small and simple machinery, which can reduce costs. Become. In addition, it is rich in mobility and versatility.

  Hereinafter, the present invention will be described based on the illustrated embodiments. FIG. 1 is an example of the case where the present invention is applied to concrete cleaning and fishing, and shows an embodiment of a construction system used for road cleaning, repair, and repair for reinforcement. When construction is performed on a road using this construction system, it is necessary to mount a part of the system or the entire system on a vehicle such as a truck in order to improve the construction efficiency.

  In FIG. 1, the construction system includes a water supply tank 1, an ultra-high pressure pump unit 2, a water pump 3, an air compressor 4, a mixer 5, a system controller 6, and a concrete cleaning / suspending device (construction device) 7. And a slurry recovery tank (for solid content separation) 8 and a water storage tank 9. This system includes a water supply tank 1, an ultra-high pressure pump unit 2, a concrete cleaning / suspending device 7, a slurry recovery tank 8, a water jet system composed of a water storage tank 9, a water supply tank 1, and a water pump 3, a bubble jet system composed of an air compressor 4 and a mixer 5. Each device is controlled by the system controller 6.

  The pressure of the water jet to be used is different from that for washing, and the former is 30 to 50 MPa and the latter is 100 to 250 MPa. However, this value is a normal case, and when special conditions are added, for example, when the dirt is significantly reduced by washing, or when the depth of the hanger is deep, the conditions may be lower or higher than these conditions. There is.

  As the mechanical device in the concrete cleaning and suspending device 7, a water-foam jet nozzle and a device for attaching these nozzles to a nozzle holder to perform a predetermined motion are used. FIG. 2 shows an example of a water-foam jet nozzle device, and FIG. 3 shows an example of a device that causes a nozzle to perform a predetermined movement.

  In FIG. 2, there are five types of water-foam jet nozzle devices. FIG. 2A shows a water-foam jet nozzle device 10-1 that generates microbubbles in a pump storage tank and pressurizes and jets microbubble water BW directly from a nozzle 10a. There is an advantage that the nozzle device itself becomes very simple.

  FIG. 2B shows a water-foam jet nozzle device 10-2 in which the water jet nozzle 10b and the water-foam jet nozzle 10c are simply arranged in parallel and the water W and the microbubble water BW are jetted in parallel. is there. Machining is relatively easy, but the cavitation effect is low.

  FIG. 2C shows a water-foam jet nozzle device 10-3 that injects water W from the central nozzle 10d and microbubble water BW from the surrounding annular nozzle 10e. The cavitation effect is high in water.

  FIG. 2D is a water-foam jet nozzle in which the injection position of FIG. 2C is reversed and the microbubble water BW is injected from the central nozzle 10d and the water W is injected from the surrounding annular nozzle 10e. Device 10-4. Demonstrates the function of cleaning with air jet.

  FIG. 2E shows a water-foam jet nozzle that injects water W from the central nozzle 10f, supplies the microbubble water BW to the mixing chamber 10g, mixes it with the water W, and injects it from the nozzle 10h at the tip. Device 10-5.

  In addition, the generation of the microvalve is (i) rotating the stirring blade at high speed, (ii) ejecting air from porous pores such as sintered metal, (iii) causing the water jet to collide with the projection, iv) A method of introducing air to the pressure sudden change part and tearing it off is considered. The microbubbles used in the present invention have a particle size of about 10 μm. As described above, microbubbles are generated in a water storage tank, and microbubble water is directly injected, or water and microbubble water are injected together. .

FIG. 3 is a graph showing the properties of the water-foam jet, the horizontal axis is the distance from the nozzle outlet, and the vertical axis is the pressure ratio (the axial pressure P _m of the water jet at an arbitrary distance from the nozzle outlet / nozzle. It is the axial pressure P _o ) of the water jet at the outlet. In FIG. 3, A is a water jet in the air, B is a water-bubble jet in water, and C is a water jet in water.

  When the water-bubble jet of the present invention is applied to washing, fishing, etc., (1) As shown in FIG. 3, the water-bubble jet B in water has a longer effective range distance than the water jet C in water. Therefore, the efficiency of processing such as washing, suspending, cutting, crushing, and erasing road white lines of various materials (for example, soil, rock, concrete, road white lines, etc.) is improved. (2) Since microbubbles do not rise and disappear as fast as general large bubbles, the effects of treatments such as washing, suspending, cutting and crushing can be assured. (3) Even in the construction where there is no groundwater, there is a cavitation effect, so the effect according to the construction purpose can be mentioned with certainty.

  In FIG. 4, (a) is a rotary jet system and (b) is a swing jet system. In FIG. 4 (a), the various types of water-foam jet nozzle devices 10 described above are arranged at equal intervals in the circumferential direction at the lower part of a disk-shaped nozzle holder 20 installed in a concrete cleaning / suspending device. At least two nozzles are attached, and the nozzle holder 20 is rotated by the motor 21 and the spur gears 22 and 23 about the rotation shaft 24 as the rotation center. By moving the device in a straight line, a movement locus in which the circles are sequentially shifted is obtained. In the case of a double nozzle, a double swivel is used for the swivel 25.

  In FIG. 4B, the nozzle holder 26 of the water-foam jet nozzle device 10 is swingably provided on the device base and is swung in a direction perpendicular to the moving direction. A motion trajectory with an acute waveform is obtained.

  The rotary jet method is easy to put into practical use in consideration of the certainty of machine motion, the difficulty of machine manufacture, and durability. In the case of the swing jet method, since the suspension is temporarily stopped at both ends of the swing, the unevenness of the suspension surface is often increased.

  5 and 6 show an example in which a construction device such as a cleaning / hanger is mounted on a truck or the like. FIG. 5 shows an example of a construction device such as a cleaning / hanger. The above-described rotary jet type water-bubble jet injection devices 31 are arranged in a staggered manner in a direction perpendicular to the moving direction, and each water-bubble jet injection device 31 is arranged. Are rotated synchronously by a drive motor 32 for rotation via a chain / sprocket power transmission mechanism. The device mount 33 is attached to the rear portion of the vehicle 30 via a slide shaft 34 and is configured to be horizontally shiftable in a direction perpendicular to the traveling direction. The shift drive motor 35 moves horizontally by a drive system using a screw rod 36.

  A plurality of water-bubble jet injection devices 31 arranged in a staggered pattern are surrounded by a partition plate / skirt 37 and housed in a work space below the device mount 33, and an air blow is introduced into the work space from an introduction port 38. Then, sludge water passes through the suction duct 39 and is discharged from the discharge port 40.

  FIG. 6 shows an outline of a construction system mounted on a truck, and a high-pressure water pump 42 driven by a fresh water tank 41 and an engine generator 43 is installed on the loading platform of the vehicle 30, and a water-foam jet Water and microbubble water are supplied to the injection device 31. In addition, the blower 44 and the receiver tank 45 are installed, air blow is supplied to the introduction port 38, and the sludge water is returned from the discharge port 40 by the suction of the blower 44. The receiver tank 44 is provided with a filtration filter 46. The sludge water in the receiver tank 45 is supplied to the fresh water tank 41 through the suction pump 47 and the filter 48.

  Next, a method for drilling concrete, soil, rock, etc. will be described. FIG. 7 shows an example of a construction system used for the drilling method. In FIG. 7, the construction system includes a vertical drilling machine 50, a high-pressure water generation line 51, a foam generation line 52, and a slurry pump 53.

  The high-pressure water generation line 51 sends water from the water tank 54 to the ultrahigh-pressure pump 56 by the turbine pump 55 and supplies high-pressure water to the drilling machine 50 by the ultrahigh-pressure hose 57. The foam generation line 52 supplies microbubble water to the perforator 50 by a pump 58 and a mixer 59. A double swivel 60 is provided above the rod of the drilling machine 50, and an intake port for high-pressure water and microbubble water is provided above the double swivel 60. At the upper end of the rod 70 of the drilling machine 50, a hose connection fitting from the slurry pump 53 is provided in order to remove slime generated by drilling in a normal circulation.

  The super high pressure pump 56 changes the discharge pressure depending on the strength of the drilling target. In the case of drilling or cutting of general concrete or sedimentary rock, the discharge pressure is 250 MPa or less, and in the case of igneous rocks such as unweathered granite Although it is possible to cut at 250 MPa, a discharge pressure of 400 to 500 MPa is desirable. Alternatively, an abrasive jet in which an abrasive is mixed with a water jet is used. A 250MPa pump is mainly a plunger pump, and the standard flow rate is 10 liters / min to 20 liters / min. For fresh granite, it is desirable to use a booster pump of about 400 to 500 MPa.

  FIG. 8 shows the details of the lower end portion of the rod of the drilling machine. The nozzle device 10 for water-foam jet is used instead of the bit and drilling is performed with the microbubble water BW. At least two water-foam jet nozzle devices 10 are arranged inside the lower end of the rod 70, and the directivity angle of each nozzle is set so that the jet is concentrated at one point on the inner wall of the hole. When water and microbubble water are ejected, a double pipe 71 is disposed. By rotating the rod 70, perforation is performed by the impact force and cavitation effect of the jet of microbubble water. It does not require a large thrust like bowling.

  FIG. 9 shows the construction sequence for drilling. The case of vertically drilling soil, rock, concrete, etc. will be described. (I) As a preparatory work, a construction system including a drilling machine 50 to be used is installed at a predetermined position. (ii) Start a high-pressure pump, a microbubble generator, etc., and drill at a predetermined position. Drill to a predetermined depth. (iii) After the drilling is completed, the machinery used is removed. (iv) When further drilling is performed, drilling is performed by repeating step (ii).

  This micro-bubble water drilling is used for drilling ground anchors, drilling for fixing steel plates for seismic reinforcement of concrete structures (such as highways and bullet trains), tower-like structures and outer walls that are outside the building. Drilling for anchors such as retaining anchors, drilling for anchors such as retaining walls and sheet piles, drilling for heat exchanger installation holes using shallow underground heat, ground improvement, steel pipes used in combination with vibro hammer Can be used for driving piles, concrete piles, sheet piles, etc.

  The characteristics when the water-bubble jet of the present invention is applied to perforations are as follows. That is, (1) The effective range distance for crushing concrete becomes longer. Therefore, the drilling speed in water is improved. (2) Since the microbubbles do not rise and disappear as fast as the large bubbles introduced from the compressor, the effects of processing such as perforation can be reliably mentioned. (3) Even in the aerial construction without water, there is a cavitation effect, so the effect according to the construction purpose can be definitely mentioned. (4) Since it is a perforation by a fluid, it does not damage the target concrete like a microcrack compared to a solid contact method such as a bit. (5) Since the water jet is stressed only in the traveling direction and hardly applied in the perpendicular direction, it does not damage the healthy part.

It is a figure which shows one Embodiment of the construction system which concerns on this invention. It is sectional drawing which shows the various examples of the nozzle apparatus for water-foam jets used with the construction method of this invention. It is the graph which compared the relationship between the distance from the nozzle exit in a nozzle apparatus for jets, and a pressure ratio ( _Pm / _Po ) with a water jet and a water-bubble jet. It is the top view and side view which show the example of the motion system of the nozzle apparatus for water-foam jets of this invention. (A) which shows an example of construction apparatuses, such as washing | cleaning and hangering of this invention, is a side view, (b) is a top view. It is a side view which shows the example at the time of mounting construction apparatuses, such as washing | cleaning and suspension, of this invention in a truck. It is a figure which shows an example of the construction system used for the drilling method of this invention. It is a vertical sectional view showing an example of the rod lower end of the drilling machine of FIG. It is a figure which shows an example of the drilling method by the construction system of FIG. 7 in order of a process.

Explanation of symbols

W ... Water BW ... Microbubble water 1 ... Water tank 2 ... Ultra high pressure pump unit 3 ... Water pump 4 ... Air compressor 5 ... Bubble generator 6 ... System controller 7 ... Concrete cleaning / hanging device (Construction equipment)
8 ... Slurry recovery tank 9 ... Water storage tank 10 ... Water-foam jet nozzle device 20 ... Nozzle holder 21 ... Motor 22, 23 ... Spur gear 24 ... Rotary shaft 25 ... Swivel 26 ... Nozzle holder 30 ... Vehicle 31 ... Water-foam jet injection device 32 ... Rotation drive motor 33 ... Device mount 34 ... Slide shaft 35 ... Shift drive motor 36 ... Screw rod 37 ... Partition plate / skirt 38 …… Inlet 39 …… Suction duct 40 …… Discharge port 41 …… Shimizu tank 42 …… High pressure water pump 43 …… Engine generator 44 …… Blower 45 …… Receiver tank 46 …… Filter filter 47 …… Suction pump 48 …… Filter 50 …… Perforator 51 …… High pressure water generation line 52 …… Bubble generation line 53 …… Slurry pump 54 …… Water tank 55 …… Turbine Pump 56 …… Super high pressure pump 57 …… Ultra high pressure hose 58 …… Pump 59 …… Foam generator 60 …… Double swivel 70 …… Rod 71 …… Double pipe

Claims (8)

  Microbubble water containing bubbles with a particle size of 50 μm or less, or a water-bubble jet composed of water and microbubble water is sprayed onto a processing object such as concrete, mortar, soil, or rock to wash and suspend A construction method using a water-foam jet characterized by performing processing such as cutting, crushing or drilling.   The construction method according to claim 1, wherein the bubble diameter of the microbubble water is 10 μm to 50 μm.   The construction method according to claim 1 or 2, wherein the water-bubble jet is obtained by jetting water and microbubble water from the jet nozzle device. .   3. The construction method according to claim 1, wherein the water-bubble jet is obtained by jetting microbubble water from a jet nozzle device. It is a construction system that uses a water-foam jet to inject a water-foam jet onto an object to be treated, such as concrete or mortar, and perform processing such as washing, suspending, or erasing the white lines on the road.
Construction apparatus comprising an injection nozzle device for injecting microbubble water containing bubbles having a particle size of about 10 μm to 50 μm, or a water-bubble jet composed of water and microbubble water, and the injection nozzle device A construction system using a water-foam jet characterized by having a micro-bubble water or a water-foam jet supply system for supplying water and micro-bubble water and a slurry recovery system for collecting the slurry in the construction apparatus.   6. The construction system according to claim 5, wherein the construction device uses a water-foam jet characterized by a rotary jet system in which a plurality of injection nozzle devices are rotated around a rotation shaft and the rotation shaft is moved. Was the construction system.   6. The construction system according to claim 5, wherein the construction device is a swing jet system in which the spray nozzle device is swung and moved in a direction perpendicular to the moving direction. It is a construction system that uses a water-foam jet to inject a water-foam jet onto an object to be treated, such as concrete, mortar, soil, or rock, and perform processing such as drilling.
A perforating machine equipped with a jet nozzle device at the tip of a rod for jetting microbubble water containing bubbles having a particle size of about 10 μm to 50 μm, or a water-bubble jet composed of water and microbubble water; A water-foam jet comprising a water-foam jet supply system for supplying microbubble water or water and microbubble water to an injection nozzle device, and a water supply system for discharging excavation shear for supplying water to a rod of a drilling machine Construction system using

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