TWI687569B - High-pressure jet mixing method - Google Patents

Abstract

There is a problem with the conventional high-pressure jet agitating device that switches the path in the monitor when drilling holes on the ground and when spraying the hardened material liquid. That is, whenever the jet path of the monitor is switched, an iron ball must be put in the monitor Since the path for the hole-cutting water is switched to the injection path for the hardened material, it is necessary to use the time and steps for putting iron balls. The present invention provides a shielding cover 19 covering the material liquid injection nozzle 5 and the compressed air injection nozzle 6, and the shielding cover 19 is configured to be supplied through a compressed air cutting water supply path 10a that can serve as a compressed air flow path and a cutting water flow path. The pressure of the drilling water to the compressed air injection nozzle 6 is not released, but it is released under the pressure of the hardened material liquid supplied to the material liquid injection nozzle 5 through the hardened material liquid supply path 9a.

Description

High-pressure jet mixing method

The present invention relates to a high-pressure jet agitation construction method, in particular to the application of a high-pressure jet agitation device, which can build a solidified body by high-pressure jet of hardened material liquid from a material liquid jet nozzle provided on the side of the front end jet device In detail, the high-pressure jet agitating device can switch the path in the tube in the tip jetting device when drilling holes on the ground and jetting the hardened material liquid, respectively.

It is known that there is a high-pressure jet agitating device that can switch the path in the tube in the tip jetting device when drilling a hole on the ground and jetting the hardened material liquid. For example, this high-pressure jet stirring device is connected to a rotating member 108 at the head of the injection rod 106, and the rotating member 108 has a liquid flow path 183 for pressure-feeding the hole water and the hardened material (hardened material liquid). The air flow path 184 for sending compressed air by pressure. The liquid flow path 183 and the air flow path 184 are respectively transmitted through the injection rod 106 and the liquid monitor flow path 195 for conveying the holed water and hardened material of the monitor 109. The gas monitor flow path 196 that delivers compressed gas is in communication. In addition, with this high-pressure jet agitator, during drilling, the drilling water is pressure-feeded through the liquid monitoring flow path 195, and the drilling water is discharged from the drilling water discharge port 192 to cut the ground under the monitor 109. After drilling the hole to the target depth, the rotating member 108 is separated from the injection rod 106, and the iron ball 102 is put into the injection rod 106, and the iron ball 102 will cut the drilling water in the monitor 109 connected to the drilling water discharge port 192 The path 197 is blocked, and the injection path of the monitor 109 is switched to the injection path for the hardened material (“Background Art” of Patent Document 1).

However, when the above-mentioned conventional high-pressure jet agitating device puts the iron ball 102 into the injection rod 106, it is necessary to put the iron ball 102 into the injection rod 106 after separating the rotating member 108 from the injection rod 106, and there must be an injection rod The operation of connecting the 106 to the rotating member 108 requires a large amount of labor for the operation of separating or connecting the rotating member 108 from the injection rod 106 for the large/heavy rotating member 108 corresponding to the larger construction diameter. There is a problem, and when the rotating member 108 is separated, since the flow path of the injection rod 106 is open, there is a problem that the earth and sand flow back into the gas nozzle 163 of the monitor 109 and cause clogging. Therefore, the following inventions have been made in the past.

The invention is to form a dedicated injection port 203 for the iron ball to switch the injection path of the monitor 209 in the rotating member 208, and to input the iron ball 202 from the dedicated injection port 203 for the iron ball, thereby eliminating the need to inject the rotating member 208 from the rod When 206 is separated, the injection path of the monitor 209 can be switched from the path 297 for the hole-cutting water in the monitor 209 to the injection path for the hardened material (Patent Document 1).

Prior technical literature Patent Literature

[Patent Document 1] Japanese Patent Gazette No. 2013-133638

The conventional high-pressure jet agitation device can save the separation and connection work of the rotating member 208 whenever the injection path of the monitor 209 is switched, so that time and labor can be reduced, and the supply of compressed gas through the rotating member 208 without interruption Under the circumstances. In addition, since the nozzle 262 of the hardened material nozzle 262 of the monitor 209 is provided with a compressed gas from the gas nozzle 263 around the hardened material nozzle 262, the blocking member 204 can be removed from the inlet of the rotating member 208 to insert the iron ball 208, thereby preventing the gas nozzle 263 of this monitor 209 from being blocked, and due to the gas nozzle 263 The surrounding hardened material nozzle 262 is provided with a nozzle plug 265. Therefore, even if gas is continuously injected, the hardened material nozzle 262 does not cause backflow, and the gas nozzle 263 can be prevented from being clogged. However, since the conventional high-pressure jet agitating device puts the iron ball 202 into the monitor 209 to switch the path for the hole-cutting water to the injection path for the hardened material, there is still a problem of the time and steps required to put the iron ball 202 in.

An object of the present invention is to provide a high-pressure jet agitation method, which uses a high-pressure jet agitation device, which can more easily switch the tube path in the front end jet device separately when drilling holes in the ground and jetting the hardened material liquid.

In order to achieve the above-mentioned object of solving the above-mentioned problems, the first aspect of the present invention is a high-pressure jet agitating device, which can switch the path in the tube connected to the injection device at the front end of the injection rod. The multiple tubes of the outer tube of the injection rod are constituted, and the high-pressure jet agitating device includes: a hardened material liquid supply path provided in the injection rod, which allows the hardened material liquid supplied from the hardened material liquid supply source to flow in; the material liquid injection nozzle It is installed on the side of the front-end injection device and communicates with the hardened material liquid supply path; the compressed air hole water supply path is provided in the injection rod and can be used for compressed air supplied from the air supply source and shaved from the water supply source. Pore water inflow; shrinkage air injection nozzle, which is provided on the outer periphery of the material liquid injection nozzle, and communicates with the compressed air hole water supply channel; hole water discharge port, which is provided on the front end of the front end spray device, and the compressed air hole water The supply path is connected; the shielding cover can cover the material liquid injection nozzle and the compressed air injection nozzle; and, the differential pressure valve can use the pressure of the compressed air supplied through the compressed air drilling water supply path to close the outlet to the drilling water outlet The flow path, and the pressure of the cutting water supplied through the compressed air cutting water supply path can be used to open the flow path to the cutting water discharge outlet; the shielding cover is supplied to the compressed air injection through the compressed air cutting water supply path Nozzle is not loosened under the pressure of the drilling water, but passes through the hardened material liquid supply path The hardened material liquid supplied to the material liquid injection nozzle can be released under the pressure.

According to the present invention, the shielding cover of the covering material liquid injection nozzle and the compressed air injection nozzle is configured to be supplied to the compressed air injection nozzle through the compressed air drilling water supply path (which can also serve as the compressed air flow path and the drilling water flow path) It does not loosen under the pressure of the drilling water, but it can be loosened under the pressure of the hardened material liquid supplied to the material liquid injection nozzle through the hardened material liquid supply path, so it is not necessary to put iron balls as usual, but It is easier to switch the path in the tube in the front end spraying device when drilling holes on the ground and spraying the hardened material liquid, which can not only shorten the construction time, but also improve the construction efficiency.

The second aspect of the present invention is the high-pressure jet stirring device of the first aspect, wherein the injection rod is a double pipe rod having an injection rod inner tube and an injection rod outer tube, and the injection rod inner tube internally constitutes a hardened material liquid supply path The outer pipe of the injection rod is located outside the inner pipe of the injection rod and forms a compressed air drilling water supply path inside.

According to the present invention, since the injection rod inner tube having a hardened material liquid supply path inside and the injection rod outer tube located outside the injection rod inner tube and forming a compressed air perforated water supply path inside is used, Because of the pipe rod, the piping configuration from the hardened material liquid supply path to the material liquid injection nozzle, and the piping configuration from the compressed air boring water supply path to the compressed air injection nozzle and the boring water discharge port are not complicated.

The third aspect of the present invention is the high-pressure jet stirring device of the first aspect, wherein the pressure of the hole-cutting water supplied to the compressed air injection nozzle through the compressed air hole-cutting water supply path is 5 MPa or less, and passes through the hardened material liquid supply path The pressure of the hardened material liquid supplied to the material liquid injection nozzle reaches 10 MPa or more.

According to the present invention, since the compressed air drilling water supply path is supplied to the compressed air The pressure of the hole water of the gas injection nozzle is 5 MPa or less, and the pressure of the hardened material liquid supplied to the material liquid injection nozzle through the hardened material liquid supply path is 10 MPa or more, so it can be adjusted to Under the pressure of the hole water, the shielding cover can not be loosened without accident, but under the pressure of the hardened material liquid supplied to the material liquid injection nozzle through the hardened material liquid supply path, the shielding cover can be loosened without accident.

The fourth aspect of the present invention is the high-pressure jet stirring device of any one of the first to third aspects, wherein the shielding cover is locked to an annular rubber ring, which is installed on the compressed air injection nozzle The outer peripheral surface on the outer side.

According to the present invention, since the shielding cover is an annular rubber ring that is locked to the outer peripheral surface of the compressed air injection nozzle, the structure is simple, and the locking of the rubber ring that can loosen the shielding cover can also be easily changed force.

The fifth aspect of the present invention is a high-pressure jet agitation method using a high-pressure jet agitation device, which is described in the first aspect, and the high-pressure jet agitation method can be switched to the injection device at the front end of the injection rod. For the path in the tube, the injection rod is composed of multiple tubes with an injection rod inner tube and an injection rod outer tube, and the high-pressure jet agitation method includes: a cutting water supply step, which supplies cutting water from a water supply source To the compressed air hole water supply path; the injection rod insertion step, so that the hole water supplied to the compressed air hole water supply path by the hole water supply step is discharged from the hole water discharge port, and the front end injection device is inserted to The predetermined depth of the target site; the position detection step to detect the position of the front-end injection device; the air material liquid supply step, after detecting that the front-end injection device has been inserted to the predetermined depth through the position detection step, stop the compressed air drilling water supply path Supplying the cutting water, supplying compressed air from the air supply source to the compressed air cutting water supply path, and supplying the hardened material liquid from the hardened material liquid supply source to the hardened material liquid supply path; and, In the step of constructing the consolidated body, the injection rod is raised while the compressed air supplied to the compressed air drilling water supply path in the air material liquid supply step is injected from the compressed air injection nozzle, and the supply air is supplied to the hardened material liquid supply path. The hardened material liquid is sprayed from the material liquid injection nozzle, thereby constructing a consolidated body in the site; the cover covering the material liquid injection nozzle and the compressed air injection nozzle does not come loose during the drilling water supply step, but is supplied in the air material liquid supply The steps can be loosened.

According to the present invention, since the shielding covers of the covering material liquid injection nozzle and the compressed air injection nozzle are not loosened during the drilling water supply step, the front end injection device can be inserted into the target site by the injection rod insertion step The predetermined depth of the structure, and because it is configured that during the air material liquid supply step, the covering cover covering the material liquid injection nozzle and the compressed air injection nozzle can be loosened, the compressed air can be removed from the compressed air by the consolidation step The spray nozzle sprays and causes the hardened material liquid to be sprayed from the material liquid spray nozzle, and a consolidated body can be built in the ground.

The sixth aspect of the present invention is the fifth aspect of the high-pressure jet agitation method using a high-pressure jet agitation device, which includes: an injection amount detection step to detect the hardened material liquid injected from the material liquid injection nozzle by the consolidation body construction step Injection amount; and, a position injection amount memory step, respectively storing the injection amount of the hardened material liquid detected by the injection amount detection step in the position of the front end injection device detected by the position detection step; the position injection position memory step The information and injection quantity information are memorized in the removable recording medium.

According to the present invention, since the position information and the injection amount information stored in the position injection amount memory step are memorized in the removable recording medium, as long as the removable recording medium is removed, the personal computer or the like can be used for the data of the stirring status Perform statistics or analysis, etc., and output the results as a printer, etc.

As described above, according to the high-pressure jet agitating device of the present invention, it is possible to more easily switch the path in the tube in the tip jetting device when drilling holes on the ground and jetting the hardened material liquid.

1: High-pressure jet nozzle

2: injection rod

3: monitor

4: Hole for spitting water

5: Material liquid spray nozzle

6: Compressed air injection nozzle

7: working machine

8: Rotating parts

9: Injection rod inner tube

9a: supply path of hardened material liquid

9b: hard material flow path

10: Injection rod outer tube

10a: compressed air drilling water supply path

10b: Compressed air drilling water flow path

11: Water supply source

12: Air supply source

13: Supply source of hardened material liquid

14: Water supply hose

15: Air supply hose

16: Hardening material liquid supply hose

17: Monitor outer tube

18: Monitor inner tube

19: cover

20: Rubber ring mounting recess

21: Rubber ring

22: Differential pressure valve

23: Management device

24: Power switch

25: Main menu screen

26: Project production key

27: Construction management key

28: Maintenance key

29: End key

30: Construction management screen

31: Design information to make labels

32: Communication confirmation label

33: Data management tab

34: Adjust the label

35: Data extraction screen

36: Planning data production screen

36a: Plan input field

37a: Hole number input section

37b: Hole number input section

38: Cutting length input section

39: Construction of the long input section

40: Unit construction time input unit

41: Injection pressure input

42: Gas pressure input section

43: hollow out the long input section

44: Construction start depth input section

45: Integrated injection quantity input unit

46: Unit injection volume input

47: Gas volume input section

48: Append key

49: Project data display bar

50a: save key

50b: Back key

51: Soil is hollowed out setting key

52: Construction time display department

53: Hole number display section

54: Long hole display

55: Construction of the long display

56: Step long display

57: Step number display section

58: Injection volume display

59: Jet pressure display

60: Total injection quantity display

61: Depth display

62: Feed torque display

63a: Gas volume display

63b: Gas pressure display

64a: Rotation speed display

64b: torque display

65: Feed speed display

66: Feed torque display

67: Start key

68: Interrupt key

69: End key

70: Hole-cutting key

71: build key

72: Selection key

73: Project display screen

74: Selection key

75: Back key

76: Project name display department

77: Spring

S1: Positioning of the monitor

S2: Whether the start key is ON

S3: Whether the hole-cutting key is ON

S4: Whether the build key is ON

S5: Step of supplying water for drilling

S6: Injection rod insertion step

S7: Position detection steps

S8: Whether the interrupt key is ON

S9: Air material liquid supply step

S10: Construction steps of consolidation

S71: Position detection step

S11: Injection amount detection step

S12: Position injection quantity memory step

S13: Whether the end key is ON

FIG. 1 is a diagram showing the construction status of a site improvement device, which can be installed with a high-pressure jet stirring device according to one embodiment of the present invention.

Fig. 2 is a cross-sectional view of an injection rod of a high-pressure jet stirring device according to one embodiment of the present invention.

FIG. 3(a) is an enlarged cross-sectional view of the material liquid injection nozzle and the compressed air injection nozzle of the high-pressure injection stirring device.

3(b) is an enlarged cross-sectional view of the material liquid injection nozzle and the compressed air injection nozzle covered by the shielding cover of the high-pressure injection stirring device.

FIG. 4(a) is a diagram for explaining a shielding cover of the high-pressure jet stirring device when drilling holes.

Fig. 4(b) is a diagram for explaining a shielding cover when a path in a tube of a high-pressure jet stirring device is switched.

FIG. 4(c) is a diagram for explaining a high-pressure jet stirring device when constructing a consolidated body.

5 is a diagram showing a main menu screen displayed by the management device of the high-pressure jet stirring device.

6 is a diagram showing a construction management screen displayed by the management device.

7 is a diagram showing a plan data creation screen displayed by the management device.

8 is a diagram showing a project display screen displayed by the management device.

9 is a flowchart of a high-pressure jet stirring method using a high-pressure jet stirring device.

10 is a diagram for explaining a high-pressure jet stirring method using a high-pressure jet stirring device.

11 is a side view showing a conventional high-pressure jet stirring device.

12 is a side view showing a conventional high-pressure jet stirring device.

Forms for carrying out the invention

Hereinafter, one embodiment of the high-pressure jet stirring device of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing the construction status of a site improvement device, which can be installed with a high-pressure jet stirring device according to one embodiment of the present invention.

As shown in FIG. 1, a monitor 3 as a front-end injection device is coupled to the front end of the injection rod 2, and a rotating member 8 is installed at the rear end of the injection rod 2. The rotating member 8 is connected to the supply hoses 14, 15, 16 of water, air, and cement slurry supplied from the water supply source 11, the air supply source 12, and the hardened material liquid supply source 13, respectively, so that water, air, and cement The slurry is supplied into the injection rod 2 (refer to FIG. 1).

The working machine 7 is a machine that supports the injection rod 2 and can move the injection rod 2 up and down, rotate, and swing. Thereby, the injection rod 2 and the monitor 3 can not only move up and down by the working machine 7, but also rotate and swing.

Next, the configuration of the injection rod 2 and the monitor 3 will be specifically described with reference to FIG. 2. 2 is a cross-sectional view of an injection rod and a monitor of a high-pressure jet stirring device.

As described above, the injection rod is installed in combination with the monitor 3. The injection rod 2 is composed of a double pipe rod composed of an injection rod inner tube 9 having an outer diameter of 43 mm and an inner diameter of 30 mm, and an injection rod outer tube 10 having an outer diameter of 90 mm and an inner diameter of 70 mm. Moreover, the injection rod inner tube 9 that forms the hardened material liquid supply path 9a inside the injection rod 2 can supply cement slurry, and is located outside the injection rod inner tube 9 to form the injection of the compressed air drilling water supply path 10a inside The rod outer tube 10 can supply hole water or compressed air. However, in this embodiment, a double pipe rod having an injection rod inner tube 9 and an injection rod outer tube 10 is used, but it is not limited to this, and multiple tubes such as a triple tube can also be used, that is, an internally constituted hard material liquid supply path 9a of the injection rod inner tube 9, is located outside the injection rod inner tube 9 and forms compressed air inside The injection rod outer tube of the supply path, and the injection rod outer tube which is located outside the injection rod inner tube 9 and constitutes the hole water supply path inside. Furthermore, in the present embodiment, the injection rod inner tube is used as the hardening material liquid supply path, and the injection rod outer tube is used as the compressed air cutting hole water supply path which can also serve as the compressed air supply path and the cutting water supply path. In this regard, the injection rod outer tube may be used as the hardened material liquid supply path, and the injection rod inner tube may be used as the compressed air cut-off water supply path that can serve as both the compressed air supply path and the cut-off water supply path. In this embodiment, the injection rod 2 having a circular cross-section of 90 mm in outer diameter is used, but it is not limited thereto, and an injection rod having a circular cross-section of about 50 mm to 140 mm in diameter (for example, about 75 mm) may be used. When an injection rod having a circular cross section with a diameter of approximately 50 mm to 140 mm (for example, approximately 75 mm) is used, the inner diameter of the injection rod inner tube 9 can be 14 mm to 16 mm. Here, the inner diameter of the injection rod inner tube 9 is determined by the flow rate of the cement slurry flowing through the injection rod inner tube 9. Furthermore, an injection rod having a hexagonal cross section can also be used.

As described above, the monitor 3 is combined and installed at the front end of the injection rod 2. The monitor 3 has a maximum diameter of 110 mm, and the upper portion is composed of a monitor outer tube 17 having an outer diameter of 90 mm and an inner diameter of 80 mm, and a monitor inner tube 18 having an outer diameter of 50 mm and an inner diameter of 30 mm. Further, inside the monitor 3, a hardening material liquid flow path 9b having a diameter of 45 mm communicating with the hardening material liquid supply path 9a of the injection rod 2 is formed in the center in the axial direction, and the outer side of the hardening material liquid flow path 9b is along the axis In the direction, a compressed air hole water flow path 10b (refer to FIGS. 2 and 4) communicating with the compressed air hole water supply path 10a of the injection rod 2 is formed. The hardened material liquid flow path 9b is formed inside the monitor inner tube 18, and the compressed air pierced water flow path 10b is formed between the monitor outer tube 17 and the monitor inner tube 18. The side surface of the monitor 3 is provided with an injection material liquid injection nozzle 5 capable of injecting cement slurry, and a compressed air injection nozzle 6 capable of injecting compressed air is provided on the outer periphery thereof. Here, the high-pressure injection nozzle 1 is composed of the material liquid injection nozzle 5 and the compressed air injection nozzle 6 on the outer periphery. Moreover, the material liquid injection nozzle 5 and the compressed air injection nozzle 6 are blocked Covered by cover 19. The description of the high-pressure injection nozzle 1 and the shielding cover 19 will be described later with reference to FIG. 3. In addition, a hole 4 for ejecting water (liquid) can be provided at the front end of the monitor 3.

In this way, since the injection rod inner tube 9 which constitutes the hardened material liquid supply path 9a inside and the injection rod inner tube 9 which is outside the injection rod inner tube 9 are used to form the compressed air supply path and the hole water supply path The double pipe rod composed of the injection rod outer tube 10 of the hole-cutting water supply path 10a can be configured from the hardened material liquid supply path 9a to the material-liquid injection nozzle 5 and the compressed air hole-cutting water supply path 10a The piping configuration to the compressed air injection nozzle 6 and the hole-drilling water outlet 4 does not become complicated.

The lower part of the monitor 3 is provided with a differential pressure valve 22. The differential pressure valve 22 can close the flow path to the hole 4 for discharging water by the spring 77 under the pressure of the compressed air supplied through the compressed air hole water supplying path 10a, and the hole water passing through the compressed air Under the pressure of the cutting water supplied from the supply path 10a, the flow path leading to the cutting water discharge port 4 can be opened. In addition, at the time of ground drilling, the compressed air cutting water supply path 9 b of the injection rod 2 can be supplied with cutting water, and the cutting water can be discharged from the cutting water discharge port 4 through the differential pressure valve 22. Then, after the ground drilling is completed, the differential pressure valve 22 can be closed by supplying compressed air to the compressed air drilling water supply path 9b of the injection rod 2, and the compression is communicated with the compressed air drilling water supply path 9b The air injection nozzle 6 (high-pressure injection nozzle 1) injects compressed air.

As described above, the rotating member 8 is connected to the supply hoses 14, 15, 16 for the water, air, and cement slurry supplied from the water supply source 11, the air supply source 12, and the hardened material liquid supply source 13, respectively, to connect the water 1. Air and cement slurry are supplied to the hardened material liquid supply path 9a and the compressed air drilling water supply path 10a provided in the injection rod 2 (refer to FIGS. 1 and 2). In this way, the water, air, and cement slurry supplied from the water supply source 11, the air supply source 12, and the hardened material liquid supply source 13, respectively, pass through the supply hoses 14, 15, 16→rotator 8→each supply path 9a, 10a →Each channel 9b, 10b, nozzle, etc. is sprayed. in Here, water and compressed air are supplied from the supply hoses 14 and 15 of water and compressed air to the compressed air perforated water supply path 10a.

Next, the high-pressure injection nozzle 1 and the shielding cover 19 of the monitor 3 will be described with reference to FIG. 3. Here, FIG. 3(a) is an enlarged cross-sectional view of the material liquid injection nozzle and the compressed air injection nozzle of the high-pressure injection and stirring device of one embodiment of the present invention, and FIG. 3(b) is covered by the shielding cover of the high-pressure injection and stirring device. An enlarged cross-sectional view of the covered material liquid injection nozzle and compressed air injection nozzle.

As described above, the high-pressure spray nozzle 1 is composed of the material liquid spray nozzle 5 that can spray cement slurry (hardened material liquid) and the compressed air spray nozzle 6 that can spray compressed air (refer to FIG. 3 ). Specifically, the material liquid injection nozzle 5 is provided inside the high-pressure injection nozzle 1, and the compressed air injection nozzle 6 is formed on the outer periphery thereof. In this way, when high-pressure injection nozzle 1 sprays cement slurry and compressed air at high pressure, it is possible to inject cement slurry from the inside of high-pressure injection nozzle 1 and compressed air from its outer periphery, and an air film of compressed air is formed around the jet of cement slurry In this way, the spray reaching distance can be increased compared to the case where there is no gas film of compressed air. Here, in the present embodiment, the pressure of the hole-cutting water supplied to the compressed air injection nozzle 6 through the compressed air hole-cutting water supply path 10b is set to 3 MPa (preferably 5 MPa or less), and the permeated hardened material liquid supply path 9a The pressure of the cement slurry (hardened material liquid) supplied to the material liquid injection nozzle 5 is set to 30 MPa (preferably 10 MPa or more).

The outer peripheral surface outside the compressed air injection nozzle 6 is formed with a rubber ring mounting recess 20 that is provided with an annular rubber ring 21. In addition, the shielding cover 19 is an annular rubber ring attached to the outer peripheral surface of the outside of the compressed air injection nozzle 6.

In this way, since the shielding cover 19 is an annular rubber ring 21 attached to the outer peripheral surface of the outside of the compressed air injection nozzle 6, the structure can be simplified, and the rubber ring that can loosen the shielding cover 19 can also be easily changed 21's locking force.

Furthermore, the cement slurry supplied from the hardened material liquid supply pipe 9a in the injection rod 2 through the hardened material liquid flow path 9b in the monitor 3 can be sprayed from the material liquid injection nozzle 5, and the compressed air in the monitor 3 is drilled. The compressed air supplied from the compressed air piercing water supply channel 10a of the water flow path 10b from the compressed air injection hole 2 can be injected from the compressed air injection nozzle 6 (refer to FIG. 2).

Next, a method of switching the path in the pipe in the monitor 3 when drilling a hole on the ground and when spraying cement slurry will be described. Here, FIG. 4(a) is a diagram for explaining a shielding cover of a high-pressure jet stirring device according to one embodiment of the present invention when drilling holes, and FIG. 4(b) is a diagram for explaining a path in a tube of the high-pressure jet stirring device. Fig. 4(c) is a diagram for explaining the construction of the consolidated body of the high-pressure jet stirring device during the switching of the shielding cover.

At the time of drilling, the hardened material liquid supply path 9a of the injection rod 2 is not supplied with cement slurry, but the compressed air cutting water supply path 10a is supplied with cutting water. In this way, by the cutting water supplied to the compressed air cutting water supply path 10a, the shielding cover 19 is not loosened from the high-pressure injection nozzle 1, so the compressed air cutting water flow path 10b passing through the monitor 3 is removed from the injection rod 2 The hole-drilling water sent from the compressed air hole-drinking water supply path 10a is discharged from the hole-draining water discharge port 4 to hole the floor. In other words, although the cutting water pressure supplied to the compressed air injection nozzle 6 is 3 MPa, it is adjusted so that if the cutting water pressure supplied to the compressed air injection nozzle 6 is 5 MPa or less, the shielding cover 19 will not be separated from the high-pressure injection nozzle 1 Since the cover 19 is covered with the high-pressure injection nozzle 1 without being detached from the high-pressure injection nozzle 1, the cover 19 is maintained. In addition, the differential pressure valve 22 is adjusted so that it can be opened under the pressure of the drilling water supplied through the compressed air drilling water channel 10b. As a result, the cutting water is not ejected from the compressed air injection nozzle 6 communicating with the compressed air cutting water flow path 10b, but the cutting water is discharged from the cutting water discharge port 4 communicating with the compressed air cutting water flow path 10b.

When switching the path in the pipe in the monitor 3, the compressed air supplied to the injection rod 2 The hole-cutting water in the hole-cutting water supply path 10a is replaced with compressed air, and cement slurry is supplied to the hardened material liquid supply path 9a injected into the rod 2. In this way, since the hardened material liquid supply pipe 9 a of the injection rod 2 passes through the hardened material liquid flow path 9 of the monitor 3 to supply the cement slurry to the material liquid injection nozzle 5, the shielding cover 19 covering the high pressure injection nozzle 1 can The spray nozzle 1 is loose. In other words, although the pressure of the cement slurry supplied to the material liquid injection nozzle 5 is 30 MPa, it is adjusted so that if the pressure of the cement slurry supplied to the material liquid injection nozzle 5 is 10 MPa or more, the shielding cover 19 can be released from the high pressure injection nozzle 1 Therefore, the shielding cover 19 can be released from the high-pressure injection nozzle 1. In addition, the differential pressure valve 22 is adjusted to be closed under the pressure of the compressed air supplied through the compressed air boring water flow path 10b. Thereby, the compressed air is not discharged from the cutting water discharge port 4 communicating with the compressed air cutting water flow path 10b, but the cement slurry is sprayed from the material liquid injection nozzle 5 of the high-pressure injection nozzle 1 and can be compressed from the outer periphery The air injection nozzle 6 injects compressed air.

When the consolidated body is built after switching the pipe path in the monitor 3, as described above, the cement slurry transported through the hardened material liquid flow path 9b of the monitor 3 can be sprayed from the material liquid injection nozzle 5 The compressed air injection nozzle 6 on the outer periphery of the liquid injection nozzle 5 injects compressed air. In other words, as described above, since the pressure of the cement slurry supplied from the hardened material liquid supply pipe 9a through the hardened material liquid flow path 9 to the material liquid injection nozzle 5 is adjusted, the shielding cover 19 can be released from the high pressure injection nozzle 1 And, by the pressure of the compressed air supplied from the compressed air drilling water supply path 10a through the compressed air drilling water flow path 10b, the differential pressure valve 22 can be closed, so that the cement can be injected from the material liquid injection nozzle 5 of the high pressure injection nozzle 1 Slurry, and compressed air can be injected from the compressed air injection nozzle 6 on the outer periphery thereof. In this way, when the consolidated body is built after switching the path in the pipe in the monitor 3, the cement slurry can be sprayed from the material liquid spray nozzle 5 and the compressed air can be sprayed from the compressed air spray nozzle 6 on the outer periphery thereof. A gas film of compressed air is formed around the jet of slurry, thereby making it possible to increase the spray reaching distance compared to the case where there is no gas film of compressed air.

Next, the high-pressure jet stirring management device (hereinafter "management device") 23 will be described with reference to FIGS. 5 to 7. The management device 23 of this embodiment is composed of a tablet terminal (input mechanism) of a touch panel. Here, FIG. 5 is a diagram showing the main menu screen displayed by the management device of the high-pressure jet agitating device of one embodiment of the present invention, FIG. 6 is a diagram showing the construction management screen displayed by the management device, and FIG. 7 is a display management Fig. 8 is a diagram of a project data creation screen displayed by the device, and Fig. 8 is a diagram of a project display screen displayed by the management device. Here, the management device 23 can turn on the switch by pressing the power switch 24.

As shown in FIG. 5, the “main menu screen 25” of the management device 23 is provided with a “project creation key 26”, a “construction management key 27”, a “maintenance key 28”, and an “end key 29”.

"Project creation key 26" is the key used to create the project name. When "Project creation key 26" is clicked, a keyboard (omitted icon) and project name creation screen (omitted icon) will be displayed. Use this keyboard to project Enter the project name on the name creation screen and tap the add key (not shown) to create the project name. In addition, the "construction management key 27" is a key to advance to the construction management screen 30 described later, and the "end key 29" is a key to end the use of the management device 23. However, the "maintenance key 28" is not very relevant to the present invention, so the description is omitted.

Next, the "construction management screen 30" will be explained. As described above, the "construction management screen 30" is a screen that can be displayed by tapping the "construction management key 27" of the main menu 25.

"Construction management screen 30" is provided with "design data creation label 31", "communication confirmation label 32", "data management label 33" and "adjustment label 34".

The "design data creation label 31" is a label for proceeding to the plan data creation screen 36 described later. By clicking the design data creation label 31, a plan data creation screen 36 can be displayed. In addition, the "data management label 33" is a label for displaying the data extraction screen 35 described later, borrowing By clicking the data management tab 33, a data extraction screen 35 can be displayed.

Next, the "plan data creation screen 36" will be described with reference to FIG. 7. Here, as described above, the "plan data creation screen 36" is a screen that is accessed by clicking the "design data creation tab 31" of the construction management screen 30.

"Project data creation screen 36" displays the project name in the upper column. The project name is a project name created using the project name creation screen (not shown) displayed on the project creation key 26 (refer to FIG. 5) of the click management device 23. In addition, the project data of the project name can be input using the "project data creation screen 36".

The "plan data creation screen 36" is provided with a plan input field 36a. In addition, the plan input field 36a is provided with "hole number input part 37a", "hole cutting length input part 38", "construction length input part 39", "unit construction time input part 40", "injection pressure" Input section 41", "Gas pressure input section 42", "Knock-out length input section 43", "Construction start depth input section 44", "Total injection amount input section 45", "Unit injection amount input section 46", " Gas volume input unit 47".

"Hole number input part 37a" is the input part of the management number of the hole to be cut next, "Pierce length input part 38" is the input part of the depth of the hole to be cut next, "Building long input part 39 "Is the input part with a long depth to be built next, "unit construction time input part 40" is an input part per 1 m depth of construction time, "injection pressure input part 41" is the cement slurry injected from the material liquid injection nozzle 5 The input part of the injection pressure, the "gas pressure input part 42" is the input part of the injection pressure of the compressed air injected from the compressed air injection nozzle 6, and the "hollow-out long input part 43" is not built with a long cutting depth. The input part, "Construction start depth input part 44" is the input part of the injection start depth of the cement slurry sprayed from the material liquid injection nozzle 5, and the "accumulated injection amount input part 45" is the cement slurry injected from the material liquid injection nozzle 5. The input unit of the cumulative injection amount, "unit injection amount input unit 46" is the input unit of the injection amount of the cement slurry injected from the material liquid injection nozzle 5 per second, and the "gas amount input unit 47" is the compressed air injection nozzle 6 Input section for the injection amount of compressed air injected per second. In the present embodiment, "001" is input to the hole number input unit 37a, "2.00m" is input to the hole length input unit 38, "1.00m" is input to the construction length input unit 39, and "14.00 seconds/" is input to the unit construction time input unit 40 m”, injection pressure input unit 41 input “35.00MPa”, gas pressure input unit 42 input “1.0MPa”, hollow length input unit 43 input “1.0m”, construction start depth input unit 44 input “2.0m”, integration The injection quantity input unit 45 inputs "2520 liters", the unit injection quantity input unit 46 inputs "180.00 liters/second", and the gas quantity input unit 47 inputs "10.0Nm ³ /second". From the input content of the plan input field 36a, it can be seen that the hole is cut 2m and the construction is started at a depth of 2m, and the construction long input portion 39 is 1m, so it will be built to a depth of 1m. Then, after the input of the plan input field 36a is completed, the "add key 48" is clicked, and the content entered in the plan input field 36a is displayed in the plan data display field 49. The content displayed in the plan data display field 49 can be stored in the memory (memory mechanism) by clicking the "save key 50a". The "soil hollowing setting key 51" is a key for setting the depth at which hollowing input by the hollowing input unit 43 is to be performed. Next, by clicking the "back key 50b", the construction management screen 30 is returned to.

Next, the "construction management screen 30" will be described with reference to FIG. Here, as described above, the construction management screen 30 is a screen displayed by clicking the construction management key 27 of the management device 23.

"Construction management screen 30" is provided with "construction time display part 52", "hole number display part 53", "hole cutting length display part 54", "construction long display part 55", "step length display part 56", " Step number display part 57", "injection amount display part 58", "injection pressure display part 59", "accumulated injection amount display part 60", "depth display part 61", "feed torque display part 62", "gas Quantity display section 63a", "Gas pressure display section 63b", "Revolution display section 64a", "Torque display section 64b", "Feed speed display Part 65", "Feed torque display part 66", "Start key 67", "Interrupt key 68", "End key 69", "Hole key 70", "Build key 71", etc.

"Construction time display part 52" is a display part of the construction time when the "start key 67" which will be described later is clicked, and "hole number display part 53" is a display of the hole number where the high-pressure jet stirring construction is to be performed next Department, "Punch Length Display Part 54" is a display part of the hole length (denominator) and the current hole length (numerator) in the process of construction, the hole length is input to the plan data creation screen 36 (refer to FIG. 7) The hole-cutting length input unit 38 corresponds to the hole number of the hole number display unit 53, and the "build length display unit 55" is a display unit for the build length (denominator) and the current build length in the process of construction. The construction length input section 39 of the drawing data creation screen 36 (refer to FIG. 7) corresponds to the hole number of the hole number display section 53, and the "step length display section 56" is 1 step long (the slurry slurry is continuously sprayed from the material liquid spray nozzle 5 (1 processing section long), the "step number display section 57" is a display section showing the number of processing times of the steps (the processing section in which cement slurry is continuously sprayed from the material liquid injection nozzle 5). Here, the hole number of the "hole number display part 53" can be selected by clicking the selection key 72 beside the hole number display part 53. As detailed in FIG. 8, by clicking the "select key 72" next to the "hole number display part 53", the "project display screen 73 (refer to FIG. 8)" can be displayed. Next, input the hole number corresponding to the data displayed in the "Project name display part 76" of the "Project display screen 73 (refer to FIG. 8)" to the "Hole number input part 37b" and click the selection key 74, thereby The plan data corresponding to the selected hole number can be read and displayed on the "hole number display part 53" of the construction management screen 30. Next, click "Back key 75" to return to "Construction Management Screen 30".

The "injection amount display part 58" is a display part for the injection amount of the cement slurry currently being sprayed from the material liquid injection nozzle 5, and the "injection pressure display part 59" is the injection of the cement slurry now being injected from the material liquid injection nozzle 5. The pressure display part, "total injection amount display part 60" has been The display part of the cumulative injection amount of the cement slurry sprayed by the injection nozzle, the "depth display part 61" is the display part of the depth of the monitor 3 (front-end injection device) from the ground (reference point (0 point)), "feeding torque display "Part 62" is a display part of the moment of the injection rod 3 in the insertion direction, "Gas amount display part 63a" is a display part of the injection amount of compressed air injected from the compressed air injection nozzle 6 per second, "Gas pressure display part 63b" "Is the display part of the injection pressure of the compressed air injected from the compressed air injection nozzle 6, "revolution number display part 64a" is the display part of the rotation speed of the injection rod 2, "torque display part 64b" is the rotation of the injection bar 2 The moment display part, the "feed rate display part 65" is a display part of the speed of the injection rod 3 in the insertion direction, and the "feed moment display part 66" is the display part of the moment of the injection rod 3 in the insertion direction.

The "start key 67" on the construction management screen 30 is a button for starting the construction of high-pressure jet mixing, the "interrupt key 68" is a button for interrupting the construction of high-pressure jet mixing, and the "end key 69" is when high-pressure jetting The button to be clicked at the end of the mixing construction. And, by clicking the "start key 67", the construction time of the "construction time display unit 52" can be measured. In addition, the "hole-cutting key 70" is a key for starting the hole-cutting of the site, and the "construction key 71" is a key for starting the construction of the consolidation body. In this way, click the "Start Key 67" to measure the construction time. After clicking the "Start Key 67", click the "Punch Key 70" to start the drilling of the site. During the process of drilling the site, you can click " Interrupt key 68" to interrupt ground drilling. Furthermore, in this state, the cement slurry can be sprayed from the material liquid spray nozzle 5 by clicking the "build key 71" to construct the consolidated body. In addition, in the process of drilling holes on the ground, you can also directly advance from the hole drilling on the ground to the construction of the consolidated body by clicking the "Build Key 71". In other words, even without clicking the "interrupt key 68", it is possible to advance from the ground drilling to the construction of the consolidated body.

Next, the construction procedure of the high-pressure jet stirring method according to one embodiment of the present invention will be described with reference to FIGS. 9 and 10. Here, FIG. 9 is a flowchart of a high-pressure jet stirring method using a high-pressure jet stirring device according to one embodiment of the present invention, and FIG. 10 is used to illustrate the use of the high-pressure jet stirring method. Diagram of the high-pressure jet mixing method of the pressure jet mixing device.

First, in S1, the monitor 3 (injection rod 2) is positioned at the location of the ground to be drilled next. Specifically, the injection rod 2 (monitor 3) is suspended by a crane, and the monitor 3 (injection rod 2) is positioned at the position of the ground 2 to be drilled next. Next, after the monitor 3 (injection rod 2) has been positioned at the predetermined position of the ground to be drilled next, it proceeds to S2.

In S2, it is determined whether the "start key 67" is "ON". This "start key 67" can be turned "ON" by clicking the start key 67 of the construction management screen 30 (refer to FIG. 6) of the management device 23. Then, when the "start key 67" is not "ON", the process of S2 will be continued until the "start key 67" becomes "ON". In addition, if the "start key 67" is "ON", the process proceeds to S3, and the construction time is measured from that time.

In S3, it is determined whether the "hole cutting key 70" is "ON". This "hole cutting key 70" can be turned "ON" by clicking the hole cutting key 70 on the construction management screen 30 (refer to FIG. 6) of the management device 23. Next, when the "cutting key 70" is not "ON", proceed to S4, and determine whether the "build key 71" is "ON", and if the "build key 71" is not "ON", repeat the process of S3 → S4 Until one of the "hole key 70" or "build key 71" becomes "ON". In addition, if the "hole cutting key 70" is "ON" in S3, the process proceeds to S5. However, the case where "build key 71" is "ON" in S4 will be described later.

In S5, a hole-cutting water supply step is implemented. This cutting water supply step is a step for supplying cutting water from the water supply source 11 to the compressed air cutting water supply path 10 a of the injection rod 2. As a result, the cutting water is sent from the water supply source 11 to the compressed air cutting water supply path 10a. Then, proceed to S6.

In S6, the injection rod insertion step is performed (refer to FIG. 10(a)). The injection rod The insertion step is a plan for inserting the cutting water supplied to the compressed air cutting water supply path 10a through the cutting water supply step from the cutting water discharge port 4 to insert the monitor 3 (front-end injection device) into the target site In-depth steps. Specifically, the compressed air cutting water supply path 10 a of the injection rod 2 is used to send the cutting water to the compressed air cutting water flow path 10 b of the monitor 3, and the cutting water is discharged from the cutting water discharge port 4. Ground drilling. When drilling the ground, as described above, the shielding cover 19 covering the high-pressure injection nozzle 1 is adjusted so as not to loosen from the high-pressure injection nozzle 1 under the pressure (3 MPa) of the hole water supplied to the compressed air injection nozzle 6 As a result, all of the hole-drilling water supplied to the compressed air hole-drilling water supply path 10a in the hole-drilling water supply step is discharged from the hole-draining water outlet 4. Also, as described above, the differential pressure valve 22 provided in the compressed air hole water flow path 10b can be opened under the pressure of the hole water supplied from the compressed air hole water supply path 10a through the compressed air hole water flow path 10b. The hole-drilling water can be discharged from the hole-draining water discharge port 4. In addition, the predetermined depth of the target site inserted into the monitor 3 (front-end injection device) is previously input to the hole-cutting length input unit 38 of the plan input field 36a (plan data creation screen 36 (refer to FIG. 7)). "Hole cutting length" will be displayed on the "Hole cutting length display part 54" of the construction management screen 30 (refer to FIG. 6) together with "Current hole cutting length during construction", so the operator can confirm the cutting of the construction management screen 30 on one side The hole length display unit 54 judges when the "interrupt key 68" is clicked, which will be described later. Then, proceed to S7.

In S7, the position detection step is implemented. This position detection step is a step of detecting the position of the monitor 3 (front-end injection device). Specifically, the ground is drilled by the injection rod insertion step, and the position of the high-pressure injection nozzle 1 of the monitor 3 in the drilled ground is detected. However, in this embodiment, the position of the high-pressure injection nozzle 1 of the monitor 3 is detected in the position detection step, but it is not limited to this, and the position of the front end of the monitor 3 or the rear end of the monitor 3 may be detected. Other locations. In addition, when there are a plurality of high-pressure injection nozzles 1, as long as one of the high-pressure injection nozzles 1 is detected Location. The position of the monitor 3 detected by the position detection mechanism is displayed as a depth on the "depth display part 61" of the construction management screen 30 (refer to FIG. 6). Then, proceed to S8.

In S8, it is determined whether the "interrupt key 68" is "ON". This "interrupt key 68" can be turned "ON" by clicking the interrupt key 68 on the construction management screen 30 (refer to FIG. 6) of the management device 23. And, when the "interrupt key 68" is not "ON", proceed to S41 to determine whether the "build key 71" is "ON", when the "build key 71" is not "ON", repeat S5 → S6 → S7 → The process of S8→S41→S5 until one of “interrupt key 68” or “build key 71” becomes “ON”. In addition, when it is determined that the "interrupt key 68" is "ON", the process proceeds to S3, and it is determined whether the "hole cutting key 70" is "ON". Here, the "Punch Key 70" will turn to "OFF" because the Interrupt Key 68 is "ON", so usually in S3 it is judged that the "Punch Key 70" is not "ON" and it will advance to S4 and judge the "Build Key Whether "71" is "ON", when it is judged that "Building Key 71" is not "ON", the process of S3→S4 will be repeated until one of "Punching Key 70" or "Building Key 71" becomes " ON". Next, when it is determined in S4 or S41 that the build key 71 is "ON", the process proceeds to S9.

In S9, the air material liquid supply step is implemented. In this air material liquid supply step, after detecting that the monitor 3 (front-end injection device) has been inserted to a predetermined depth (the "build key 71" has been clicked) through the position detection step, the supply to the compressed air drilling water supply path 10a is stopped The steps of cutting water, supplying compressed air from the air supply source 12 to the compressed air cutting water supply path 10a, and supplying cement slurry (hardening material liquid) from the hardening material liquid supply source 13 to the hardening material liquid supply path 9a. By this, compressed air can be supplied to the constricted air hole water supply path 10a instead of the hole water, and cement slurry (hardened material liquid) can be supplied to the hardened material liquid supply path 9a. Then, proceed to S10.

In S10, a step of constructing a consolidated body is carried out (refer to FIG. 10(b) to FIG. 10(d)). The step of constructing the consolidated body is to raise the injection rod 2 while supplying the air material liquid supply step The compressed air supplied to the compressed air drilling water supply path 10a is injected from the compressed air injection nozzle 6, and the cement slurry (hardened material liquid) supplied to the hardened material liquid supply path 9a is injected from the material liquid injection nozzle 5, whereby Steps to build a consolidation within the site. Specifically, when constructing the consolidated body, as described above, the shielding cover 19 covering the high-pressure injection nozzle 1 can be detached from the high-pressure injection nozzle 1, and therefore the monitor 3 is transmitted from the hardened material liquid supply path 9a of the injection rod 2 The cement slurry transported by the hardened material liquid flow path 9b can be sprayed from the material liquid spray nozzle 5. In addition, compressed air is supplied to the compressed air hole water supply path 10a of the injection rod 2, and the compressed air is injected from the compressed air injection nozzle 6 through the compressed air hole water flow path 10b. In other words, since the differential pressure valve 22 is closed under the pressure of the compressed air supplied from the compressed air drilling water supply path 10a through the compressed air drilling water flow path 10b, all the compressed air is injected from the compressed air injection nozzle 6. Therefore, when the consolidated body is constructed after switching the path in the pipe in the monitor 3, the cement slurry can be injected from the material liquid injection nozzle 5 and the compressed air can be injected from the compressed air injection nozzle 6 from the outside. In this way, a gas film of compressed air can be formed around the jet of cement slurry, and compared with the case of the gas film without compressed air, the reach of the jet can be increased. In addition, the depth length of the consolidated body to be built in the construction site is input to the construction length input unit 39 of the plan input field 36a (plan data creation screen 36 (refer to FIG. 7)) in advance. The construction long display part 55 of the construction management screen 30 (refer to FIG. 6) is displayed together with the current construction chief during construction. Therefore, the operator can confirm the construction long display part 55 of the construction management screen 30 while checking S8, which will be described later. End key 69". Then, proceed to S71.

In S71, a position detection step is implemented. This position detection step is the same as S7, and is a step of detecting the position of the monitor 3 (front-end injection device). Specifically, after the consolidation body is built in the construction site by the consolidation body construction step, the position of the high-pressure jet nozzle 1 of the monitor 3 in the built construction site is detected. However, like S7, in this embodiment, the position detection step is to detect and monitor The position of the high-pressure injection nozzle 1 of the monitor 3 is not limited thereto, and other positions of the monitor such as the front end position of the monitor 3 or the rear end position of the monitor 3 may be detected. In addition, when there are plural high-pressure injection nozzles 1, it is only necessary to detect the position of one of the high-pressure injection nozzles 1. The position of the monitor 3 detected by the position detection means is displayed as the depth on the "depth display part 61" of the construction management screen 30 (refer to FIG. 6). Then, proceed to S11.

In S11, an injection amount detection step is implemented. This injection amount detection step is a step of detecting the injection amount of the cement slurry (hardened material liquid) injected from the material liquid injection nozzle 5 by the consolidated body construction step. The injection amount detected every second from the material liquid injection nozzle 5 detected by the injection amount detection step is displayed on the injection amount display portion 58 of the construction management screen 30 (refer to FIG. 6 ), and has been injected from the material liquid injection nozzle 5 so far The cumulative spray amount of the cement slurry (hardened material liquid) is also displayed on the cumulative spray amount display unit 60 of the construction management screen 30. Then, proceed to S12.

In S12, a position injection amount memory step is implemented. This position spray amount memory step is a step of memorizing the spray amount of cement slurry (hardened material liquid) detected by the spray amount detection step in the position of the monitor 3 (front-end spray device) detected by the position detection step, respectively. By this, it can be judged how much cement slurry was sprayed at which position in the site. In addition, the position information and the injection amount information stored in the position ejection amount memory step can be stored in a removable recording medium such as USB, so a personal computer connected to the removable recording medium such as USB can be used for data on the stirring status Perform statistics, analysis, etc., and output the result as a printer, etc. Then, proceed to S13.

In S13, it is determined whether the "end key 69" is "ON". This "end key 69" can be turned "ON" by clicking the end key 69 of the construction management screen 30 (refer to FIG. 6) of the management device 23. Next, when the "end key 69" is not "ON", the process proceeds to S9, and the processing of S9→S10→S71→S11→S12→S13→S9 is repeated until the "end key 69" becomes "ON". when When it is judged that the "end key 69" has become "ON", the high-pressure jet stirring method is ended.

As described above, according to the present embodiment, the shielding cover 19 covering the material liquid injection nozzle 5 and the compressed air injection nozzle 6 is configured to pass through the compressed air flow path which can also serve as the injection rod 2 and the punching water flow path. The hole water supply path 10a does not loose the pressure of the drilling water supplied to the compressed air injection nozzle 6, but the pressure of the cement slurry (hardened material liquid) supplied to the material liquid injection nozzle 5 through the hardened material liquid supply path 9a The bottom can be released, so there is no need to put iron balls as usual, you can switch the pipe in the monitor 3 (front-end injection device) more easily when drilling holes on the site and when spraying the cement slurry (hardened material liquid). Path, which shortens construction time and improves construction efficiency. In other words, since it is so constructed that the shielding cover 19 covering the material liquid injection nozzle 5 and the compressed air injection nozzle 6 does not come loose during the drilling water supply step, the monitor 3 can be inserted into the object by the injection rod insertion step The predetermined depth of the site, and because it is configured such that the shielding cover 19 covering the material liquid injection nozzle 5 and the compressed air injection nozzle 6 can be loosened during the air material liquid supply step, can be compressed from the The air jet nozzle 6 jets compressed air, and jets the hardened material liquid from the material liquid jet nozzle 5, so that a consolidated body can be built in the ground.

The embodiments disclosed this time are examples and not limitations. The scope of the present invention is not as described above but as shown in the patent application scope, and includes all changes within the meaning and scope equivalent to the patent application scope.

1: High-pressure jet nozzle

2: injection rod

3: monitor

5: Material liquid spray nozzle

6: Compressed air injection nozzle

8: Rotating parts

9: Injection rod inner tube

9a: supply path of hardened material liquid

9b: hard material flow path

10: Injection rod outer tube

10a: compressed air drilling water supply path

10b: Compressed air drilling water flow path

17: Monitor outer tube

18: Monitor inner tube

19: cover

22: Differential pressure valve

77: Spring

Claims (2)

A high-pressure jet agitation construction method is the application of a high-pressure jet agitation device, which can switch the inner path of the tube connected to the injection device at the front end of the injection rod. The injection rod is composed of an injection rod inner tube and an injection rod outer tube. The high-pressure jet agitating device includes: a hardened material liquid supply path, which is provided in the injection rod, and allows the hardened material liquid supplied from the hardened material liquid supply source to flow in; and a material liquid injection nozzle, which is provided at the front end The side of the injection device communicates with the hardened material liquid supply path; the compressed air drilling water supply path is provided in the injection rod, and can provide compressed air supplied from the air supply source and the drilling water supplied from the water supply source Inflow; compressed air injection nozzle, which is provided on the outer periphery of the material liquid injection nozzle, and communicates with the compressed air boring water supply channel; and the boring water discharge port, which is provided on the front end of the front end jetting device, cuts with the compressed air The hole water supply path is in communication; the shielding cover can cover the material liquid injection nozzle and the compressed air injection nozzle; and the differential pressure valve can be closed to the cutting edge by the pressure of the compressed air supplied through the compressed air hole water supply path The flow path of the hole water discharge port, and the flow path to the hole water discharge port can be opened by the pressure of the hole water supplied through the compressed air hole water supply path; the shielding cover is cut by the compressed air The hole water supply path to the compressed air injection nozzle does not loosen the pressure of the hole-cutting water, but it can be released under the pressure of the hardened material liquid supplied to the material liquid injection nozzle through the hardened material liquid supply path ; The aforementioned high-pressure jet agitation method can switch the inner path of the injection device connected to the front end of the injection rod. The injection rod is composed of a multiple tube having an injection rod inner tube and an injection rod outer tube. : Cutting water supply step, supplying cutting water from the water supply source to the compressed air cutting water supply path; injection rod insertion step, so that the compressed air cutting water supply path is supplied by the cutting water supply step The hole-punching water is discharged from the hole-punching water discharge port, and the front-end injection device is inserted into the target site at a predetermined depth; the position detection step detects the position of the front-end injection device; the air material liquid supply step After the detection step detects that the front-end injection device has been inserted to a predetermined depth, the supply of the cutting water to the compressed air cutting water supply path is stopped, and compressed air is supplied from the air supply source to the compressed air cutting water supply path, and Supplying the hardened material liquid from the hardened material liquid supply source to the hardened material liquid supply path; and a consolidated body construction step, while raising the injection rod, while supplying the compressed air boring by the air material liquid supply step The compressed air of the water supply path is injected from the compressed air injection nozzle, and the hardened material liquid supplied to the hardened material liquid supply path is injected from the material liquid injection nozzle, thereby constructing a consolidated body in the ground; covering the material liquid The shielding cover of the injection nozzle and the compressed air injection nozzle will not be loosened in the cutting water supply step, but may be loosened in the air material liquid supply step. The high-pressure jet agitation construction method according to claim 1, comprising: a jet amount detection step that detects the jet amount of the hardened material liquid jetted from the material liquid injection nozzle by the consolidation body construction step; and The position ejection amount memory step separately stores the ejection amount of the hardened material liquid detected by the ejection amount detection step in the position of the front-end ejection device detected by the position detection step; the position information and the position information memorized in the position ejection amount memory step The injection quantity information is memorized in the removable recording medium.

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