Drilling machine

Abstract

To provide a drilling machine and an injection material injection mechanism capable of mechanically grasping an excavation depth and an injection depth of an injection material.SOLUTION: An injection material injection mechanism 10 comprises: an injection pipe 20 inserted into a ground G; an injection hose 30 inserted into the injection pipe 20, discharging an injection material into the injection pipe 20 at a predetermined injection depth, and injecting the injection material into the ground G from a peripheral wall of the injection pipe 20; a recording device 60 recording an injection time of the injection material and at least one of an injection amount and an injection pressure of the injection material; identifiers 40 provided on an outer peripheral face of the injection hose 30; and a detection device 50 installed on a ground and sensing the identifiers 40 to detect an injection depth.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention provides Drilling machine Regarding. [Background technology]

[0002] The following Patent Document 1 describes a chemical injection method in which the injection pressure or injection rate of a chemical solution injected into the target ground is controlled. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-330805 Summary of the Invention [Problem to be solved by the invention]

[0004] In the chemical injection method of Patent Document 1, the chemical injection pressure is dynamically controlled by methods such as continuously increasing and decreasing the injection pressure of the chemical, repeatedly increasing and decreasing the injection pressure within a set range in a sawtooth pattern, or gradually increasing it in a pulsed manner.

[0005] This chemical injection method is considered to be applicable to water-stopping works, ground reinforcement works, anchor works, etc. In such methods, in order to expand the range of chemical injection in the vertical direction, the injection hose for injecting the injection material such as chemical liquid may be moved up and down to inject the injection material at different depths.

[0006] When moving the injection hose up and down in this way, it is necessary to know the injection pressure and injection volume of the grouting material for each depth. However, there has not been a mechanism to link and manage the injection pressure and injection volume of the grouting material with the depth.

[0007] In order to link the injection pressure and injection volume of the grouting material with the depth and manage them, it is necessary to know the injection depth of the grouting material. Also, when excavating the ground with a drilling rod, for example, it is necessary to know the excavation depth.

[0008] In conventional excavation methods, excavation depth is often controlled by workers' visual inspection, etc. However, since the outer peripheral surfaces of excavation rods and injection hoses are generally formed uniformly along the axial direction, errors are likely to occur when excavation depth or injection depth is controlled by workers' visual inspection, etc.

[0009] In consideration of the above, an object of the present invention is to provide a drilling machine or grout injection mechanism that can mechanically grasp the excavation depth and the grout injection depth. [Means for solving the problem]

[0010] One aspect The drilling machine comprises a drilling rod that is inserted into the ground, a plurality of identifiers provided on the outer surface of the drilling rod and arranged at predetermined intervals in the axial direction of the drilling rod, and a detection device that is installed on the ground and detects the identifiers to determine the drilling depth.

[0011] One aspect In this drilling machine, an identifier is provided on the outer circumferential surface of the drill rod. This identifier is detected by a detection device installed on the ground, thereby detecting the drilling depth. In other words, the drilling depth can be mechanically determined. Claim 1 The drilling machine is The drilling rod is inserted into the ground, and a plurality of identifiers are provided on the outer surface of the drilling rod and arranged at predetermined intervals in the axial direction of the drilling rod. A detection device is installed on the ground and detects the identifiers to determine the drilling depth. The identifier is a color marker formed in a planar shape around the entire outer surface of the drilling rod, and the detection device is a device capable of reading the color and time of the color marker. Claim 2 The drilling machine is Claim 1 In the excavator described in the above, the color marker comprises a first application portion painted in a first color, and a second application portion provided adjacent to the first application portion either below or above the first application portion and painted in a second color.

[0012] One aspect The injection mechanism includes an injection hose that is inserted into the ground and injects the injection material into the ground at a predetermined injection depth, a recording device that records the injection time of the injection material and at least one of the injection amount and injection pressure of the injection material, an identifier provided on the outer surface of the injection hose, and a detection device that is installed on the ground and detects the identifier to determine the injection depth.

[0013] One aspect In the grout injection mechanism, an identifier is attached to the outer surface of the injection hose. This identifier is detected by a detection device installed on the ground, and the injection depth of the grout is determined. In other words, the injection depth of the grout can be mechanically determined.

[0014] In addition, since the injection time of the injection material can be linked to at least one of the injection volume and injection pressure for each injection depth, it is easy to check the finished shape against the injection plan of the injection material.

[0015] One aspect In the injection material injection mechanism, the identifier is a color marker formed in a planar shape around the entire outer surface of the injection hose, and the detection device is a device capable of reading the color of the color marker.

[0016] One aspect In the grout injection mechanism, a color marker is formed around the entire outer surface of the injection hose, so that even if the injection hose rotates, the detection device can read the color and detect the depth of the injection section.

[0017] In addition, the color markers are formed in a surface. Therefore, compared to linear markers such as scales, the detectable range is wider and errors are less likely to occur. Furthermore, they are easy to read even if the outer surface of the injection hose is soiled with dirt or other contaminants.

[0018] One aspect In the injection material injection mechanism, the color marker comprises a first application portion coated with a first color and a second application portion disposed adjacent to the first application portion either below or above the first application portion and coated with a second color.

[0019] One aspect In the injection material injection mechanism, the color marker has a first application portion coated with a first color and a second application portion coated with a second color.

[0020] The second application section is located either above or below the first application section, adjacent to the first application section. This allows the detection device to detect different colors in different orders when the injection hose is moved upward or downward. This allows the direction of movement of the injection hose to be mechanically determined.

[0021] One aspect In the injection mechanism, the injection hose is provided with a removal mechanism for removing any deposits adhering to the identifier.

[0022] One aspect In the grouting material injection mechanism, the removal mechanism can remove any deposits that have adhered to the identifier. This means that even if the outer surface of the injection hose becomes soiled with dirt or the like, the dirt can be removed, making the identifier easier to read. [Effects of the Invention]

[0023] According to the present invention, the excavation depth and the injection depth of the grouting material can be mechanically grasped. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a cross-sectional view showing a grout injection mechanism according to an embodiment of the present invention. [Figure 2] (A) is a partially enlarged cross-sectional view showing the state in which the injection hose is inserted into the injection pipe, (B) is a partially enlarged cross-sectional view showing the state in which the packer material is being inflated, and (C) is a partially enlarged cross-sectional view showing the state in which the injection material is being discharged from the discharge port. [Figure 3] (A) is a cross-sectional view showing the state in which ground improvement is being carried out by injecting injection material into the ground, (B) is a cross-sectional view showing the state in which ground improvement is being carried out in the section adjacent to (A), and (C) is a cross-sectional view showing the state in which ground improvement is being carried out in the section adjacent to (B). [Figure 4] (A) is a graph showing an example of the relationship between color intensity detected by the detection device and time, (B) is a graph showing the relationship between the injection time of the injection material recorded by the recording device and the injection amount of the injection material, and (C) is a graph showing the relationship between the injection time of the injection material recorded by the recording device and the injection pressure of the injection material. [Figure 5] (A) is a graph showing another example of the relationship between color intensity detected by the detection device and time, (B) is a graph showing the relationship between the injection time of the injection material recorded by the recording device and the injection amount of the injection material, and (C) is a graph showing the relationship between the injection time of the injection material recorded by the recording device and the injection pressure of the injection material. [Figure 6] (A) is an elevation view showing an example in which the identifiers are formed in one color, (B) is an elevation view showing an example in which the color is changed for each identifier, (C) is an elevation view showing an example in which the identifiers are formed using a scale, and (D) is an elevation view showing an example in which the identifiers are formed using a two-dimensional code. [Figure 7] 1 is a cross-sectional view showing an outline of a drilling machine according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, a drilling machine and a grout injection mechanism according to an embodiment of the present invention will be described with reference to the drawings. Components indicated by the same reference numerals in the various drawings are the same components. However, unless otherwise specified in the specification, each component is not limited to one, and multiple components may be present.

[0026] Furthermore, the description of the same components and symbols in each drawing may be omitted. Note that the present invention is not limited to the following embodiments, and may be implemented by making appropriate modifications, such as omitting components or replacing them with different components, within the scope of the object of the present invention.

[0027] <Injection material injection mechanism> The grout injection mechanism 10 according to the embodiment of the present invention is a mechanism for carrying out ground improvement by injecting grout into the ground G using the double packer method. As shown in FIG. 1 , the grout injection mechanism 10 includes an injection pipe 20, an injection hose 30, an identifier 40, a detection device 50, and a recording device 60.

[0028] The type of injection material is not particularly limited, and liquids such as water glass, cement milk, and water with added thickener, as well as powdered ground improvement materials, etc. can be used.

[0029] (injection tube) The injection pipe 20 is a steel cylindrical body that is inserted into a drilled hole GH formed in the ground G. Discharge ports 22, which are openings for discharging the injection material discharged from an injection hose 30 (described later) to the outside of the injection pipe 20, are formed on the peripheral wall of the injection pipe 20 at predetermined intervals (interval L1) along the cylindrical axis direction.

[0030] The discharge port 22 is closed by a rubber sleeve 24 that covers the outer periphery of the injection tube 20 except when the injection material is being discharged.

[0031] (Injection hose) Injection hose 30 is a flexible tubular body that is inserted into injection pipe 20, and has a discharge port 32 formed in the peripheral wall at the tip. Two packer materials 34 are arranged before and after discharge port 32 (before and after in the axial direction of injection hose 30) (so-called double packers).

[0032] The discharge port 32 is an opening that discharges the injection material delivered to the inside of the injection hose 30 from a liquid delivery device or the like (not shown) to the outside of the injection hose 30 and into the injection tube 20 .

[0033] The packer material 34 is a rubber balloon that expands due to water pressure. When deflated, the outer diameter of the packer material 34 is smaller than the inner diameter of the injection hose 30. Therefore, when the packer material 34 is deflated, the injection hose 30 can be moved inside the injection pipe 20, as shown in Figure 2(A).

[0034] Furthermore, the outer diameter of the packer material 34 in an expanded state can be deformed to a dimension larger than the inner diameter of the injection pipe 20. Therefore, as shown in Fig. 2(B), by expanding the packer material 34, the packer material 34 can be brought into close contact with the inner peripheral wall of the injection pipe 20. As a result, the space V1 inside the injection pipe 20, in which the discharge port 32 is located, is waterproofed.

[0035] Therefore, as shown by the arrow in Figure 2 (C), the injection material discharged from the discharge port 32 is not discharged into the space V2 inside the injection pipe 20 other than the space in which the discharge port 32 is located, but is discharged to the outside of the injection pipe 20 through the discharge port 22 of the injection pipe 20.

[0036] At this time, the rubber sleeve 24 is elastically deformed by the discharge pressure of the grout, and a gap is formed between the rubber sleeve 24 and the outer circumferential surface of the injection pipe 20. The grout passes through this gap and is discharged to the outside of the injection pipe 20. The grout discharged to the outside of the injection pipe 20 is injected into the ground G and permeates into the ground G, as shown in sections E1, E2, and E3 in Figures 3(A) to 3(C).

[0037] In this way, the grouting material discharged from the injection hose 30 is injected into the ground G through the discharge outlet 22 of the injection pipe 20. Since the discharge outlets 22 of the injection pipe 20 are arranged at a predetermined interval L1, the grouting material can be injected into the ground G at intervals of the interval L1 or at intervals that are multiples of the interval L1.

[0038] (identifier) As shown in FIG. 1, identifiers 40 are color markers arranged at predetermined intervals (intervals L2) in the axial direction of injection hose 30.

[0039] Identifier 40 is formed in a planar shape around the entire circumference of the outer surface of injection hose 30. "Formed around the entire circumference" means that it is formed over the entire circumferential area of ​​injection hose 30. In contrast, an identifier that is formed over only half the circumferential area of ​​injection hose 30 is not referred to as "formed around the entire circumference."

[0040] Identifier 40 is formed by applying paint to the outer peripheral surface of fill tube 20. The identifier also includes a first application portion 42 that is applied with red paint as a first color, and a second application portion 44 that is applied with green paint as a second color. Second application portion 44 is disposed adjacent to and below first application portion 42, and is formed with a smaller width along the axial direction than first application portion 42.

[0041] Although the colors of the first application portion 42 and the second application portion 44 are not particularly limited, it is preferable to select a color combination that is easily distinguishable mechanically. A "color combination that is easily distinguishable mechanically" is, for example, a combination of complementary colors such as red and green, or a combination of colors with a large difference in brightness such as white and black.

[0042] Various dimensions can be used for the interval L2 between the identifiers 40. For example, a predetermined dimension conforming to the metric system, such as every 1 [m] or 2 [m], can be used. Alternatively, a dimension equal to the interval L1 between the discharge ports 22 of the injection pipe 20 may be used. In this embodiment, the interval L2 is equal to the interval L1.

[0043] (Detection device) The detection device 50 is installed on the ground outside the ground G, and detects the identifier 40 to determine the injection depth of the grouting material. The detection device 50 is formed including an imaging unit such as a video camera, and this imaging unit captures an image of the outer surface of the injection hose 30.

[0044] The detection device 50 also includes an analysis unit such as a CPU. The analysis unit is capable of detecting the color of the image captured by the imaging device. This analysis unit is capable of detecting the presence or absence, hue, and brightness of the identifier 40 from the image captured by the imaging device. As will be described in detail later, the analysis unit also detects the injection depth of the injection material from changes in the image over time. Furthermore, the analysis unit records the time when the captured image was recorded.

[0045] (Recording device) The recording device 60 is a logger that records the injection time of the grouting material, the injection amount of the grouting material, and the injection pressure. The injection amount and injection pressure of the grouting material are transmitted to the recording device 60 from a liquid delivery device (not shown) that delivers the grouting material into the injection hose 30.

[0046] In addition to the detection device 50 and the recording device 60, the injection material injection mechanism 10 may also be equipped with a display means such as a monitor that notifies the operator of the detection results of the identifier 40 by the detection device 50 and the recording results by the recording device 60.

[0047] <Soil improvement method> An example of a method for improving the ground G using the grout injection mechanism 10 will be described. To improve the ground G, an injection pipe 20 is inserted into a drilled hole GH formed in the ground G, as shown in FIG.

[0048] As shown in Figure 3(A), it is preferable to insert the injection pipe 20 into the ground G so that the injection material injected into the ground G from the outlet 22A, which is the outlet at the tip, reaches the lower end of the area E0 where ground improvement is desired.

[0049] In other words, it is preferable to manage the injection pressure and injection amount of the injection material so that the injection material injected into the ground G from the outlet 22A, which is the outlet at the tip, reaches the lower end of the area E0 where ground improvement is desired.

[0050] Next, as shown in Figure 3(A), injection hose 30 is inserted into injection pipe 20. At this time, the insertion depth of injection hose 30 is adjusted so that discharge port 22A is positioned between two packing materials 34 in injection hose 30.

[0051] The insertion depth of injection hose 30 is determined by identifier 40. To determine the insertion depth of injection hose 30 by identifier 40, for example, when the distance between discharge outlet 22A and detection device 50 is dimension L3, identifier 40A is formed in advance at a portion that is the distance L3 from discharge outlet 32. Identifier 40A is the most upstream identifier on injection hose 30. Furthermore, identifiers 40B and 40C are formed downward from identifier 40A at the above-mentioned intervals L2 (= interval L1).

[0052] By setting the detector 50 to a state in which it detects the identifier 40A, it is possible to set the discharge port 22A to be positioned between the two packing materials 34 in the injection hose 30. In other words, the position of the discharge port 22A can be used as the injection depth of the injection material. Note that what is detected here is the first application part 42 in the identifier 40A.

[0053] After adjusting the insertion depth of injection hose 30, the injection material is discharged from outlet 32 ​​of injection hose 30 and injected into ground G through outlet 22A. In Fig. 3(A), the section to be improved by the injection material discharged from outlet 22A is shown by a dashed line as section E1.

[0054] 3(B), injection hose 30 is pulled up to adjust the insertion depth of injection hose 30. At this time, by making detection device 50 detect identifier 40B adjacent to identifier 40A, it is possible to make injection hose 30 so that discharge outlet 22A and adjacent discharge outlet 22B are positioned between two packer materials 34. In other words, the position of discharge outlet 22B can be used as the injection depth of the grouting material.

[0055] The timing for pulling up the injection hose 30 is preferably when the injection material injected from the discharge port 22A into the ground G is expected to reach the bottom of the area E0 where ground improvement is desired. In order to determine this timing, it is preferable to manage the injection time after understanding the injection pressure and injection volume of the injection material, and it is even more preferable to check the injection pressure, injection volume and injection time of the injection material using the display device described above.

[0056] Once the insertion depth of the injection hose 30 has been adjusted, the injection material is injected into the ground G through the discharge port 22B. In Figure 3(B), the section to be improved by the injection material discharged from the discharge port 22B is shown by a dashed line as section E2.

[0057] 3(C), injection hose 30 is pulled up to adjust the insertion depth of injection hose 30. At this time, by having detection device 50 detect identifier 40C adjacent to identifier 40B, it is possible to position discharge outlet 22B and adjacent discharge outlet 22C between the two packer materials 34 of injection hose 30. In other words, the position of discharge outlet 22C can be used as the injection depth of the grouting material.

[0058] Once the insertion depth of the injection hose 30 has been adjusted, the injection material is injected into the ground G through the discharge port 22C. In Figure 3(C), the section to be improved by the injection material discharged from the discharge port 22C is shown by a dashed line as section E3.

[0059] In the above example, an example was described in which the insertion depth of the injection hose 30 was adjusted while the injection material was being discharged from the discharge outlet 32, but it is also possible to temporarily suspend the discharge of the injection material each time the ground is improved in sections E1 and E2, and then resume discharge after the adjustment of the insertion depth of the injection hose 30 has been completed.

[0060] <Management of injection depth, injection volume and injection pressure> In order to continuously improve the ground in the vertical direction of area E0, the vertical dimensions of sections E1, E2, and E3 must be at least equal to the interval L1. Also, the horizontal dimensions of sections E1, E2, and E3 must be equal to or greater than the horizontal dimensions of area E0.

[0061] Furthermore, in order to improve the ground in the region E0 with the desired quality, the concentration of the grouting material in the region E0 needs to be equal to or higher than a predetermined concentration.

[0062] In this way, in order to manage the dimensions of sections E1, E2, and E3, it is preferable to link and manage the "injection pressure" and "injection time" of the grouting material discharged from outlets 22A, 22B, and 22C for each "injection depth" of the grouting material injected into each section. Also, in order to manage the concentration of the grouting material in sections E1, E2, and E3, it is preferable to link and manage the "injection amount" and "injection time" of the grouting material for each injection depth.

[0063] Furthermore, in order to accurately manage the dimensions of sections E1, E2, and E3 and the concentration of the injection material in sections E1, E2, and E3, it is even more preferable to link and manage the "injection pressure and injection amount" of the injection material and the "injection time" for each "injection depth."

[0064] (Injection depth control) 4(A) shows a schematic graph of the relationship between the color intensity detected by the detection device 50 and time, with the detection device 50 detecting the identifier 40A as the initial state. As described above, the analysis unit of the detection device 50 is capable of detecting the color of an image.

[0065] 4A, the color intensity on the vertical axis represents lightness and saturation. In the following description, strong (weak) color intensity means high (low) lightness and saturation, respectively.

[0066] The solid line K1 is a graph showing the color intensity of the red hue, and the dashed line K2 is a graph showing the color intensity of the green hue. The unpainted outer surface of the injection hose 30 (see FIG. 1) is black, and the color intensities of red and green are weak. On the other hand, the red first application portion 42 and the green second application portion 44 have strong color intensities of red and green, respectively.

[0067] That is, in the areas of the solid line K1 shown in Fig. 4(A) where the color intensity is strong, the detection device 50 detects the first applicator 42 in any of the identifiers 40A, 40B, and 40C (see Figs. 3(A) to 3(C)). Therefore, in these areas, the injection liquid can be injected into the ground G from any of the discharge ports 22A, 22B, and 22C.

[0068] In addition, in the portion of the dashed line K2 where the color intensity is strong, the detection device 50 detects the second application portion 44 in any one of the identifiers 40A, 40B, and 40C.

[0069] The changes over time of the solid line K1 and the dashed line K2 in Figure 4(A) indicate that a portion of strong color intensity in the dashed line K2 was detected following a portion of strong color intensity in the solid line K1. That is, after the first applicator 42 shown in Figure 1 was detected, the second applicator 44 was detected. This indicates that, as the injection hose was pulled out, the second applicator 44 below was detected following the first applicator 42 above.

[0070] From the above, the following can be read from the graph of FIG. 4(A) based on the information detected by the detection device 50.

[0071] The initial state in which the detection device 50 detects the identifier 40A, i.e., the initial state in which the position of the discharge outlet 22A is set to the injection depth (injecting the injection material into section E1), is maintained for the time indicated by period T1.

[0072] After the period T1 has elapsed, the injection hose 30 is pulled up and the state in which the detection device 50 detects the identifier 40B, i.e., the position of the discharge outlet 22B is set to the injection depth (the injection material is being injected into section E2), is maintained for the time indicated by the period T2.

[0073] After the period T2 has elapsed, the injection hose 30 is pulled up and the state in which the detection device 50 detects the identifier 40C, i.e., the position of the discharge outlet 22C is set to the injection depth (the injection material is being injected into section E3), is maintained for the time indicated by the period T3.

[0074] (Management of injection volume and injection pressure) FIG. 4(B) shows the injection time of the injection material recorded by the recording device 60 and the injection amount of the injection material (injection flow rate Q [m 3 4(C) is a schematic graph showing the relationship between the injection time of the injection material and the injection pressure P [Pa] of the injection material, as recorded by the recording device 60.

[0075] Here, by plotting the periods T1, T2, and T3 shown in Fig. 4(A) in Fig. 4(B), the relationship between the injection time of the grouting material and the injection amount of the grouting material in sections E1, E2, and E3 can be understood. Similarly, by plotting the periods T1, T2, and T3 shown in Fig. 4(A) in Fig. 4(C), the relationship between the injection time of the grouting material in sections E1, E2, and E3 can be understood.

[0076] In the example shown in Figures 4(A) to 4(C), the grouting material is injected in the order of sections E1, E2, and E3, but the embodiment of the present invention is not limited to this. For example, Figures 5(A) to 5(C) show an example in which the grouting material is injected in the order of sections E1, E3, and E2.

[0077] Similar to the above, the following can be read from the graph of FIG. 5(A) based on the information detected by the detection device 50.

[0078] The initial state in which the detection device 50 detects the identifier 40A, i.e., the initial state in which the position of the discharge outlet 22A is set to the injection depth (injecting the injection material into section E1), is maintained for the time indicated by period T1.

[0079] After the period T1 has elapsed, the injection hose 30 is pulled up and the state in which the detection device 50 detects the identifier 40B, i.e., the position of the discharge outlet 22B is set to the injection depth (the injection material is being injected into section E2), is maintained for the time indicated by the period T2.

[0080] However, since period T2 is a short period, this period T2 is the period during which identifier 40B is detected while injection hose 30 is being pulled up.

[0081] Thereafter, the state in which the detection device 50 detects the identifier 40C, i.e., the state in which the position of the discharge outlet 22C is set to the injection depth (injecting the injection material into section E3), is maintained for the time indicated by period T3.

[0082] After the period T3 has elapsed, the injection hose 30 is "pushed down" and the state in which the detection device 50 detects the identifier 40B, i.e., the position of the discharge outlet 22B is set to the injection depth (injecting the injection material into section E2), is maintained for the time indicated by period T4.

[0083] The fact that injection hose 30 has been "pushed down" can be seen from the fact that a portion of strong color intensity indicated by dashed line K2 is detected followed by a portion of strong color intensity indicated by solid line K1. In other words, first application unit 42 is detected after second application unit 44 shown in Figure 1 is detected. This indicates that by pushing down the injection hose, first application unit 42 on the upper side is detected following second application unit 44 on the lower side.

[0084] <Action and effect> As described above, in the grouting material injection mechanism 10 according to the embodiment of the present invention, as shown in Fig. 1, an identifier 40 is provided on the outer circumferential surface of the injection hose 30. This identifier 40 is detected by a detection device 50 installed on the ground, and the injection depth of the grouting material is detected. In other words, the injection depth of the grouting material can be mechanically determined.

[0085] Furthermore, since the injection time of the grouting material can be linked to at least one of the injection volume and injection pressure (both in this embodiment) for each injection depth, it is easy to check the finished form against the injection plan of the grouting material. Furthermore, if an abnormal value occurs in the injection volume or injection pressure, the depth at which the abnormal value occurs can be easily identified.

[0086] Furthermore, identifier 40 is a color marker formed around the entire outer periphery of injection hose 30. This allows detection device 50 to read the color and detect the depth of the injection section even when injection hose 30 rotates.

[0087] Furthermore, identifier 40 is formed in a planar shape. Therefore, compared to linear markers such as scales, it has a wider detectable range and is less susceptible to errors. It is also easy to read even if the outer surface of injection hose 30 is soiled with dirt or the like.

[0088] In order to make the identifier 40 easier to read, the injection hose 30 may be provided with a removal mechanism that removes any deposits that have adhered to the identifier 40. Examples of such a removal mechanism include a water spraying device that sprays water toward the identifier 40, and a cleaning device such as a wiper that wipes the surface of the identifier 40.

[0089] The water injection device and the cleaning device are preferably provided immediately below or immediately above the identifier 40 on the injection hose 30. "Immediately below" or "immediately above" generally means a portion within about 10 cm below or above the identifier 40.

[0090] The identifier 40 also includes a first application section 42 that is painted in a first color, red, and a second application section 44 that is painted in a second color, green. The second application section 44 is provided below and adjacent to the first application section 42.

[0091] As a result, the order of colors detected by detection device 50 differs when injection hose 30 is moved upward and when it is moved downward. This makes it possible to mechanically grasp the direction of movement of injection hose 30.

[0092] In this embodiment, each identifier 40 is formed in two colors, but the embodiment of the present invention is not limited to this. For example, identifier 40 may be formed in one color, as in identifier 70 shown in Fig. 6(A). In this case, detection device 50 detects the movement of injection hose 30 and determines whether injection hose 30 is being pulled up or pushed down.

[0093] Furthermore, different colors may be used for each identifier, such as identifiers 72A, 72B, and 72C shown in Fig. 6(B), which makes it easier to grasp the injection depth.

[0094] Furthermore, the identifier may be formed by a scale, as in the identifier 74 shown in Fig. 6(C). It is preferable that the scale also indicates the size.

[0095] Furthermore, the identifier may be formed by a two-dimensional code such as a QR code (registered trademark) or a barcode, as in the identifier 76 shown in Fig. 6(D). In other words, it is sufficient if the injection depth can be mechanically ascertained.

[0096] As such, various forms of identifiers can be applied in the present invention, and they do not have to be formed "around the entire circumference" or "in a planar manner" on the outer surface of the injection hose 30, as in the case of the identifier 40 described above.

[0097] For example, the above-mentioned identifier 76 is not formed "over the entire circumference" of the outer circumferential surface of the injection hose 30, and the identifier 74 is not formed "on the surface" of the outer circumferential surface of the injection hose 30.

[0098] Furthermore, while the identifiers 40, 70, 72A, 72B, and 72C are formed using colors, these colored identifiers may also be formed in lines rather than in a planar shape, and the line width is not particularly limited. That is, in each of these cases, it is sufficient that the detection device 50 can identify the identifier. If the identifier can be identified, the colored identifiers may also be formed by adhesive tape or the like rather than by painting.

[0099] In addition, in this embodiment, an example has been described in which the identifiers 40 are formed in three locations, but the number of identifiers 40 can be selected appropriately depending on the depth of the area E0 to be improved on the ground and the spacing L1 between the outlets 22.

[0100] In addition, in this embodiment, an example of ground improvement using a single drilling hole GH has been described, but multiple drilling holes GH may be formed. When multiple drilling holes GH are formed, the injection pipe 20 and the injection hose 30 may be inserted into each of these multiple drilling holes GH to improve the ground.

[0101] However, when carrying out ground improvement work through adjacent drilled holes GH at the same time, it is preferable not to inject the grout at the same injection depth at the same time. If the grout is injected at the same injection depth at the same time, the pressure in the ground G may become excessively high, causing the ground G to float. Therefore, it is preferable to inject the grout at different injection depths at the same time.

[0102] <Modification> Although the grout injection mechanism of the present invention is used in a double packer method using two packer materials 34, the embodiment of the present invention is not limited to this. The grout injection mechanism can be used in various methods of injecting grout into the ground G (such as a double pipe strainer method). In various methods, the grout may be injected into the ground G using a single-pipe pipe (for example, only the injection hose 30) that does not use an outer pipe such as the injection pipe 20.

[0103] Furthermore, the present invention can be applied not only to grout injection mechanisms but also to the drilling machine 12 shown in Fig. 7. The drilling machine 12 may include a drilling rod 80 that is inserted into the ground, an identifier 40 provided on the outer surface of the drilling rod 80, and a detection device 50 that is installed on the ground and detects the identifier 40 to determine the drilling depth. By providing the identifier 40 on the drilling rod 80 in this way, the drilling depth can be mechanically determined. [Explanation of symbols]

[0104] 10 Injection material injection mechanism 12 Drilling machine 20 Injection tube 30 Injection hose 32 Discharge port 34 Packer material 40 Identifiers 40A Identifier 40B Identifier 40C identifier 42 First application section 44 Second application section 50 Detection Device 60 Recording Device 70 Identifiers 72A Identifier 74 Identifier 76 Identifier 80 Drilling Rod

Claims

1. A drilling rod to be inserted into the ground; A plurality of identifiers provided on the outer peripheral surface of the drilling rod and arranged at predetermined intervals in the axial direction of the drilling rod; a detection device that is installed on the ground and detects the identifier to detect the excavation depth; Equipped with The identifier is a color marker formed in a planar shape around the entire outer circumferential surface of the drilling rod, The detection device is a device capable of reading the color and time of the color marker.

2. The color marker is a first coating portion coated with a first color; A second application section provided adjacent to or above the first application section and coated with a second color; Equipped with The drilling machine according to claim 1.

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