Injection machine, ground reinforcement method, and program

Abstract

To provide an injection machine, a ground reinforcement method, and a program that can save labor in determining the degree of injection and allow even an inexperienced worker to easily and reliably determine the degree of injection.SOLUTION: An injection machine 1 is an injection machine used for a ground reinforcement method. A plurality of thresholds are set for an injection amount and injection pressure of ground improvement material. A plurality of injection patterns PT1 to PT6 are created by the plurality of thresholds. Based on an injection amount and injection pressure at the time when injection into a plurality of injection regions 23a to 23c is completed, a corresponding injection pattern is discriminated from the plurality of injection patterns and displayed on a management screen 11 in an identifiable manner.SELECTED DRAWING: Figure 2

Description

Technical Field

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[0001] The present invention relates to an injector, a ground reinforcement method, and a program used for pre - ground reinforcement work during tunnel excavation.

Background Art

[0002] When excavating a tunnel, so - called long - pipe fore - piling is known, in which long pipes are driven into the front ground around the tunnel, and a ground improvement material is injected from inside these long pipes to improve the ground. For example, in the construction method shown in Patent Document 1, a plurality of pipes of about 3 m are connected to form a plurality of long pipes, which are driven around the outer periphery of the tunnel. The long pipes are divided into a plurality of injection areas in the longitudinal direction, and a ground improvement material is injected into each injection area.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, the degree of injection into each injection area is important information for predicting the degree of improvement of voids and cracks in the ground during excavation. Conventionally, the degree of injection into each injection area has been determined by reading an injection daily report recording the injection amount and injection pressure, and it has been necessary to create an injection daily report after the injection is completed. In addition, experience is required to determine the degree of injection into each injection area, and it has taken time for the determination.

[0005] The present invention has been made to solve the above problems, and an object thereof is to provide an injector, a ground reinforcement method, and a program that can save labor in the operation of determining the degree of injection and enable an operator with little experience to easily and surely determine the degree of injection during pre - ground reinforcement work during tunnel excavation.

Means for Solving the Problems

[0006] The present invention is as follows: 1. An injection machine used in a construction method in which multiple long steel pipes are driven into the unexcavated ground of a tunnel, the interior of the long steel pipes is divided into multiple injection regions in the longitudinal direction, a ground improvement material is injected into each of the multiple injection regions, and the ground improvement material is allowed to penetrate into cracks in the surrounding ground through discharge holes provided on the outer circumference of the long steel pipes to reinforce the ground, Multiple threshold values ​​are set for the injection amount and injection pressure of the aforementioned ground improvement material. Multiple injection patterns are created by the aforementioned multiple thresholds. An injection machine characterized by identifying the corresponding injection pattern from the multiple injection patterns based on the injection amount and injection pressure at the time when injection into the multiple injection areas is completed, and displaying it in an identifiable manner on a management screen. 2. An input unit for inputting the multiple threshold values, A creation unit that creates the plurality of injection patterns based on the plurality of thresholds input in the input unit, An acquisition unit that acquires data on the amount and pressure of the ground improvement material injected into the plurality of injection areas, A discrimination unit determines the corresponding injection pattern from the plurality of injection patterns created by the creation unit based on the data of the injection amount and injection pressure at the end of injection acquired by the acquisition unit, The injection machine according to 1. above, further comprising: a display unit that displays the injection pattern determined by the discrimination unit in an identifiable manner in an area that mimics the plurality of injection areas displayed on the management screen. 3. The injection machine according to 2. above, characterized in that the display unit illustrates areas that mimic the multiple injection areas for each of the multiple long steel pipes, and displays the injection pattern for each area in a distinguishable manner using different colors and / or patterns. 4. The process of driving multiple long steel pipes into the unexcavated ground of the tunnel, The process involves injecting a ground improvement material into multiple injection regions, each of which is divided longitudinally within the interior of the aforementioned long steel pipe. The process involves inputting multiple threshold values ​​set for both the injection amount and injection pressure of the aforementioned ground improvement material, A step of creating multiple injection patterns based on the input multiple thresholds, A step of determining the corresponding injection pattern from the created injection patterns based on the amount and pressure of the ground improvement material injected when injection into the multiple injection areas is completed, A ground reinforcement method characterized by comprising the step of displaying the identified injection pattern in an identifiable manner in an area that mimics the plurality of injection areas displayed on a management screen. 5. A computer that controls the injector described in any one of items 1 to 3 above: A creation process that creates the multiple injection patterns based on the multiple thresholds, An acquisition process to acquire data on the amount and pressure of the ground improvement material injected into the multiple injection areas, Based on the acquired data of the injection volume and injection pressure at the end of the injection, a discrimination process is performed to determine the corresponding injection pattern from the multiple injection patterns created. A program characterized by causing the user to perform a display process that displays the identified injection pattern in an identifiable manner in areas that mimic the multiple injection areas displayed on the management screen. [Effects of the Invention]

[0007] According to the present invention, when performing preliminary ground reinforcement work during tunnel excavation, the degree of injection of ground improvement material into multiple injection areas is displayed in a patterned manner, eliminating the need to create an injection report and then determine the degree of injection. Furthermore, even inexperienced workers can easily and reliably determine the degree of injection. [Brief explanation of the drawing]

[0008] The present invention will be further described in the following detailed description with reference to the drawings, which refer to several drawings, with reference to non-limiting examples of typical embodiments of the present invention, although similar reference numerals indicate similar components in several of the drawings. [Figure 1]This is a front view of the injector in the embodiment. [Figure 2] This is the block part of the injector. [Figure 3] This is a flowchart for explaining the injection process by the injector. [Figure 4] This is a flowchart for explaining the injection process by the injector. [Figure 5] This is an explanatory diagram for explaining the injection pattern in the embodiment. [Figure 6] This is a flowchart for explaining the discrimination display process of the injection pattern by the injector. [Figure 7] This is an explanatory diagram for explaining the display form of the injection pattern on the management screen of the injector. [Figure 8] This is an explanatory diagram for explaining the ground reinforcement method in the embodiment. (a) shows a longitudinal section along the axial direction of the tunnel, and (b) shows a cross section perpendicular to the axial direction of the tunnel. [Figure 9] This is an explanatory diagram for explaining the ground reinforcement method.

Mode for Carrying Out the Invention

[0009] The matters shown here are exemplary and for exemplarily explaining the embodiments of the present invention, and are described for the purpose of providing an explanation that can most effectively and easily understand the principles and conceptual features of the present invention. In this regard, it is not intended to show the structural details of the present invention more than necessary for a fundamental understanding of the present invention, and it is to clarify to those skilled in the art how some forms of the present invention are actually embodied by the explanation in combination with the drawings.

[0010] Hereinafter, the present invention will be specifically described with reference to the drawings according to the embodiments.

[0011] In the ground reinforcement method of this embodiment, as shown in FIGS. 8 and 9, a plurality of (19 in FIG. 8(b)) long steel pipes 22 are driven into the unexcavated ground of the tunnel 21, and the inner cavity of the long steel pipes 22 is divided into a plurality of injection regions (three injection regions in FIG. 9) 23a to 23c in the longitudinal direction. Ground improvement materials are injected into the plurality of injection regions 23a to 23c respectively, and the ground improvement materials are infiltrated into the cracks of the surrounding ground from the discharge holes 22a provided on the outer periphery of the long steel pipes 22 to reinforce the ground.

[0012] In this ground reinforcement method, as the ground improvement material, for example, a urethane-based foaming resin such as silica resin is used. In this case, two types of liquids A and B are mixed and injected into the ground while foaming and cured, thereby improving the ground around the tunnel. In addition, the plurality of steel pipes 22 driven into the front ground around the tunnel 21 extend obliquely and linearly with respect to the tunnel axis, and are arranged at intervals in the circumferential direction of the arch portion 21a of the tunnel 21. For construction management, the plurality of steel pipes 22 are assigned hole numbers (for example, the hole numbers shown as 1 to 19 in FIG. 7, etc.) in the order of arrangement in the direction along the arch portion 21a. Furthermore, in this ground reinforcement method, a method is adopted in which the steel pipes 22 are driven every other hole, and after injecting the ground improvement material into the steel pipes 22, the steel pipes 22 are driven in between, and the ground improvement material is injected into the steel pipes 22. Each is referred to as a leading hole (for example, the steel pipe 22 with an odd hole number) and a trailing hole (for example, the steel pipe 22 with an even hole number).

[0013] As shown in Figures 1 and 2, the injection machine 1 of this embodiment includes an injection unit 2 for pumping ground improvement material and a control unit 3 electrically connected to the injection unit 2. The injection unit 2 has multiple pairs (for example, three pairs) of injection pumps 4a and 4b to pump and mix two types of liquid for each of the multiple injection areas 23a to 23c of each steel pipe 22. A pressure sensor 5 for detecting the injection pressure of the ground improvement material is provided on the discharge side of each of these injection pumps 4a and 4b. In addition, a supply source 6a for liquid A and a supply source 6b for liquid B are connected to the supply ports of each injection pump 4a and 4b (see Figure 9). Furthermore, an insert tube 7 to be inserted into the steel pipe 22 is connected to the discharge port of each injection pump 4a and 4b. Multiple insert tubes 7 are provided according to the multiple injection areas 23a to 23c.

[0014] The control unit 3 comprises a management screen 11, a control panel (operation panel) 12, an input unit 13, and a control device 14. The management screen 11 displays the injection information of the injection unit 2 (injection amount, injection pressure, etc.) in one place. The control panel 12 performs functions such as starting and stopping the injection unit 2 and adjusting the flow rate. Furthermore, the input unit 13 inputs the injection amount threshold (in this embodiment, the actual injection rate relative to the design injection amount) and the injection pressure threshold (in this embodiment, the rising pressure from the initial pressure) prior to injection. Specifically, the input unit 13 is a touch panel screen for inputting the thresholds, and the corresponding numerical values ​​can be entered. However, in addition to the touch panel, the input unit 13 may also use mechanical switches or voice input means. Alternatively, instead of the control panel 12 and the input unit 13, an input means that combines the functions of the control panel 12 and the input unit 13 may be provided.

[0015] In the injection management method described as an example, as shown in Figure 5, two thresholds are set for the injection volume: 100% of the design injection volume (lower threshold) and 200% of the design injection volume (upper threshold). Two thresholds are also set for the injection pressure: initial pressure + 0.5 MPa (lower threshold) and initial pressure + 2.5 MPa (upper threshold). In this embodiment, two thresholds each are set for the injection volume and injection pressure, but depending on the injection management method, it may be possible to input three or more thresholds. For example, one or more intermediate thresholds may be set between the upper and lower thresholds.

[0016] The control device 14 comprises a control unit 15, a creation unit 16, an acquisition unit 17, a discrimination unit 18, and a display unit 19. The control device 14 is also electrically connected to a management screen 11, a control panel 12, an input unit 13, injection pumps 4a and 4b, and a pressure sensor 5. Furthermore, various control processes performed by the control device 14 may be implemented by either hardware or software. Preferably, the control device 14 can be configured around a microcontroller (microcomputer) equipped with a CPU, a memory device (ROM, RAM, etc.), input / output circuits, etc., and peripheral circuits such as input / output interfaces.

[0017] The control unit 15 manages the injection of injection pumps 4a and 4b according to the injection conditions (i.e., the injection amount and injection pressure set in the control panel 12). Specifically, as shown in Figure 3, during injection of the lead hole (S1), injection is stopped when the injection pressure reaches the initial pressure + 2.5 MPa (S2) (S3). Also, when the injection pressure is less than the initial pressure + 2.5 MPa (S4), injection is carried out up to the design injection amount (S5). Also, as shown in Figure 4, during injection of the trailing hole (S6), injection is stopped when the injection pressure reaches the initial pressure + 2.5 MPa (S7) (S8). Also, when the injection pressure is 0.5 MPa or more and less than 2.5 MPa (S9), injection is carried out up to the design injection amount (S10). Furthermore, when the injection pressure is less than the initial pressure + 0.5 (S11), injection is continued (S12), and when the injection pressure reaches the initial pressure + 0.5 (S13), injection is stopped (S14). On the other hand, if the injection pressure remains below the initial pressure + 0.5, injection is carried out up to the maximum injection amount (200% of the design injection amount) (S15).

[0018] The control unit 15 obtains the cumulative injection amount from the injection amount (time integral of the injection speed) set in the control panel 12. However, the cumulative injection amount may also be obtained from the detected values ​​of flow meters installed in the supply passages of the injection pumps 4a and 4b or in the insert tube 7, or from the rotational speed of the injection pumps 4a and 4b. Furthermore, the control unit 15 obtains the injection pressure from the detected value of the pressure sensor 5.

[0019] The creation unit 16 creates (determines) multiple (for example, six) injection patterns PT1 to PT6 based on multiple thresholds input in the input unit 13 (see Figure 5). Specifically, the creation unit 16 graphs the behavior of the injection volume and injection pressure during injection based on the multiple thresholds to create multiple injection patterns PT1 to PT6.

[0020] Injection pattern PT1 is a pressure-increasing injection pattern in which the injection volume in the preceding and succeeding holes is less than the design injection volume, and the injection pressure reaches the initial pressure + 2.5 MPa. Injection pattern PT2 is a quantitative injection pattern in which the preceding hole is injected up to the design injection volume, and the injection pressure is between the initial pressure + 0.5 MPa and + 2.5 MPa. Injection pattern PT3 is a quantitative injection pattern in which the preceding hole is injected up to the design injection volume, and the injection pressure does not reach the initial pressure + 0.5 MPa. Injection pattern PT4 is a no-increase injection pattern in which the succeeding hole is injected up to the design injection volume, and the injection pressure is between the initial pressure + 0.5 MPa and + 2.5 MPa. Injection pattern PT5 is an increased-volume injection pattern in which the injection volume in the succeeding hole exceeds 100% but is less than 200% of the design injection volume, and the injection pressure reaches the initial pressure + 0.5 MPa. Furthermore, injection pattern PT6 is an increased injection pattern in which the injection volume is increased to 200% of the design injection volume in the downstream bore, and the injection pressure does not reach the initial pressure + 0.5 MPa. Although injection patterns PT2 and PT4 behave the same, they are treated as separate injection patterns to distinguish between the preceding and succeeding holes.

[0021] The acquisition unit 17 acquires data on the injection amount and injection pressure of the ground improvement material injected into multiple injection areas 23a to 23c. Specifically, the acquisition unit 17 acquires the final injection amount (cumulative injection amount) and final pressure of multiple injection areas 23a to 23c for each of the multiple long steel pipes 22 at the end of injection from the control unit 15 and sends this data to the discrimination unit 18. However, the acquisition unit 17 may also directly acquire the final injection amount and final pressure from the control panel 12 and pressure sensor 5 without going through the control unit 15.

[0022] The discrimination unit 18 uses the data of the injection volume and injection pressure at the end of the injection acquired by the acquisition unit 17 (specifically, the correlation between the data and each threshold) to determine (select) the injection pattern corresponding to the current injection operation from among the multiple injection patterns PT1 to PT6 created by the creation unit 16. Specifically, the discrimination unit 18 compares the data sent from the acquisition unit 17 with the multiple injection patterns PT1 to PT6 created by the creation unit 16 to determine the corresponding injection pattern.

[0023] The display unit 19 visually displays the injection patterns identified by the discrimination unit 18 in multiple regions 123a to 123c that mimic the multiple injection regions 23a to 23c displayed on the management screen 11 (see Figure 7). Specifically, the display unit 19 illustrates regions 123a to 123c that mimic the multiple injection regions 23a to 23c for each of the multiple long steel pipes 22, and displays the injection patterns in each of the multiple regions 123a to 123c using different colors and / or patterns so that they can be identified. Note that any color can be used for the color identification of injection patterns PT1 to PT6, as long as each pattern can be identified. Also, for the pattern identification of injection patterns PT1 to PT6, for example, different hatching patterns can be used. Furthermore, the injection holes 122, which are modeled after multiple long steel pipes 22 and are illustrated on the management screen 11, are arranged in order of hole number, and the display unit 19 displays the injection pattern for each region 123a to 123b of the injection holes 122 that have corresponding hole numbers to the steel pipes 22 for which the injection work has been completed. The timing of the display of the injection pattern is not particularly restricted; for example, it may be displayed after each injection operation for one steel pipe 22 is completed, or it may be displayed all at once after the injection operations for all preceding and / or succeeding holes in the steel pipe 22 have been completed.

[0024] The memory unit (not shown) of the control device 14 stores a program that executes the following: a creation process that creates injection patterns PT1 to PT6 using multiple thresholds; an acquisition process that acquires data on the amount and pressure of the ground improvement material to be injected; a discrimination process that determines the injection pattern based on the acquired data on the amount and pressure of the injection at the end of injection; and a display process that displays the determined injection pattern in an identifiable manner in areas 123a to 123c that mimic multiple injection areas 23a to 23c displayed on the management screen 11. This program may be pre-stored (installed) in the control device 14, or it may be provided in the form of being stored on a storage medium such as a CD-ROM or USB memory, or it may be downloaded from an external device via a network.

[0025] Next, a ground reinforcement method using the injection machine 1 with the above configuration will be described. First, two threshold values ​​are set for both the amount of ground improvement material to be injected and the injection pressure. Then, in the injection machine 1, prior to injecting the ground improvement material, each of the set threshold values ​​is input to the input unit 13 (step ST1 in Figure 6), and multiple injection patterns PT1 to PT6 are created (step ST2). The timing of the threshold input is not particularly restricted; for example, it may be before or after the placement of the steel pipe 22.

[0026] Subsequently, multiple long steel pipes 22 are driven into the unexcavated ground in front of the outer perimeter of the tunnel 21 as pilot holes using a known method. Next, insert tubes 7 are inserted into the steel pipes (pilot holes) 22 for injecting ground improvement material (see Figure 9). In this embodiment, three insert tubes 7 of different lengths are inserted, and multiple injection pumps 4a and 4b inject the ground improvement material into three injection areas 23a to 23c that divide the inside of the long steel pipes 22 in the longitudinal direction. At this time, the injection machine 1 terminates or stops the injection when it reaches the conditions determined by the injection management method (see Figure 3), and performs a discrimination display process for injection patterns PT1 to PT6. In this discrimination display process, data on the final injection amount and final injection pressure at the end of injection is acquired (step ST3 in Figure 6), and these data are compared with multiple injection patterns PT1 to PT6 to determine the corresponding injection pattern (step ST4). Next, the identified injection patterns are visually displayed in multiple areas 123a to 123c shown on the management screen 11 (step ST5).

[0027] Next, multiple long steel pipes 22 are driven as trailing holes in the unexcavated ground in front of the outer perimeter of the tunnel 21 using a known method. In the same manner as with the preceding holes, ground improvement material is injected into the three injection areas 23a to 23c of the steel pipes (trailing holes) 22, and the injection machine 1 performs discrimination and display processing for injection patterns PT1 to PT6.

[0028] As described above, in the injection machine 1 of this embodiment, multiple thresholds are set for both the injection amount and injection pressure of the ground improvement material, and multiple injection patterns PT1 to PT6 are created based on these multiple thresholds. The injection amount and injection pressure at the time when injection into multiple injection areas 23a to 23c is completed determine the corresponding injection pattern from the multiple injection patterns PT1 to PT6 and displays it identifiable on the management screen 11. In this way, by patternizing the degree of injection in each injection area 23a to 23c based on multiple thresholds set for both the injection amount and injection pressure of the ground improvement material and displaying it on the management screen 11, the effort of creating an injection report and then judging the degree of injection is eliminated, and even inexperienced workers can easily and reliably judge the degree of injection.

[0029] Furthermore, in this embodiment, the display unit 19 illustrates regions 123a to 123c that mimic multiple injection regions 23a to 23c for each of the multiple long steel pipes 22, and displays the injection pattern for each region 123a to 123c using different colors and / or patterns so that it is possible to visually determine the injection patterns PT1 to PT6.

[0030] Furthermore, in this embodiment, a ground reinforcement method is employed in which a steel pipe 22 forming a pre-hole is driven and ground improvement material is injected into the steel pipe 22, and then a steel pipe 22 forming a post-hole is driven between adjacent steel pipes 22 and ground improvement material is injected into the steel pipe 22. At least a lower threshold (design injection amount) and an upper threshold (200% of the design injection amount) are set for the amount of ground improvement material injected, and at least a lower threshold (initial pressure + 0.5 MPa) and an upper threshold (initial pressure + 2.5 MPa) are set for the injection pressure of the ground improvement material. A pressure rise injection pattern PT1 is in which the injection amount in the pre-hole and post-hole is less than the lower threshold and the injection pressure reaches the upper limit pressure, and in the pre-hole injection At least the following injection patterns are created: PT2, a quantitative injection pattern in which the injection amount is injected up to the lower threshold and the injection pressure is above the lower threshold and below the upper threshold; PT3, a quantitative injection pattern in which the injection amount is injected up to the lower threshold in the preceding hole and the injection pressure is below the lower threshold; PT4, a no-increase injection pattern in which the injection amount is injected up to the upper threshold in the subsequent hole and the injection pressure is above the lower threshold and below the upper threshold; PT5, an increase injection pattern in which the injection amount exceeds the lower threshold and falls below the upper threshold in the subsequent hole and the injection pressure reaches the lower threshold; and PT6, an increase injection pattern in which the injection amount is injected up to the upper threshold in the subsequent hole and the injection pressure is below the lower threshold. This allows for a more accurate determination of the degree of injection of the ground improvement material.

[0031] Furthermore, the present invention is not limited to the embodiments, and various modifications can be made within the scope of the present invention depending on the purpose and application. That is, in the above embodiment, an example was given in which the injection pattern is displayed in areas 123a to 123c that mimic multiple injection areas 23a to 23c on the management screen 11, but the invention is not limited to this, and for example, symbols (e.g., PT1 to PT6) or patterns indicating hole numbers and injection patterns may be displayed side by side on the management screen 11.

[0032] The present invention is not limited to the embodiments detailed above, and various modifications or changes are possible within the scope of the claims of the present invention. [Industrial applicability]

[0033] This invention is widely used as a technology for injecting ground improvement materials into the ground during tunnel excavation. [Explanation of Symbols]

[0034] 1; Injector, 11; Management screen, 13; Input unit, 16; Creation unit, 17; Acquisition unit, 18; Discrimination unit, 19; Display unit, 21; Tunnel, 22; Long steel pipe, 23a~23c; Injection area, 123a~123c; Injection area on management screen, PT1~PT6; Injection pattern.

Claims

1. In an injection machine used in a construction method in which multiple long steel pipes are driven into the unexcavated ground of a tunnel, the interior of the long steel pipes is divided into multiple injection regions in the longitudinal direction, a ground improvement material is injected into each of the multiple injection regions, and the ground improvement material is allowed to penetrate into cracks in the surrounding ground through discharge holes provided on the outer circumference of the long steel pipes to reinforce the ground, The aforementioned method for reinforcing the ground involves driving in a steel pipe forming a pilot hole and injecting a ground improvement material into the steel pipe, and then driving in a steel pipe forming a pilot hole between adjacent steel pipes forming pilot holes and injecting a ground improvement material into the steel pipe. Multiple threshold values ​​are set for the injection amount and injection pressure of the aforementioned ground improvement material. Multiple injection patterns are created by the aforementioned multiple thresholds. The aforementioned multiple injection patterns include an injection pattern common to both the preceding and succeeding holes (PT1), injection patterns specific to the preceding hole (PT2, PT3), and injection patterns specific to the succeeding hole (PT4, PT5, PT6). An injection machine characterized by identifying the corresponding injection pattern from the multiple injection patterns based on the injection amount and injection pressure at the time when injection into the multiple injection areas is completed, and displaying it in an identifiable manner on a management screen.

2. The plurality of thresholds include at least a lower threshold and an upper threshold for the injection volume and a lower threshold and an upper threshold for the injection pressure, The injection machine according to claim 1, characterized in that the plurality of injection patterns include at least: a pressure-increasing injection pattern (PT1) in which the injection amount in the preceding and succeeding holes falls below the lower threshold and the injection pressure reaches the upper threshold; a quantitative injection pattern (PT2) in which the injection amount in the preceding hole is up to the lower threshold and the injection pressure is above the lower threshold and below the upper threshold; a quantitative injection pattern (PT3) in which the injection amount in the preceding hole is up to the lower threshold and the injection pressure falls below the lower threshold; a no-increase injection pattern (PT4) in which the injection amount in the succeeding hole is up to the upper threshold and the injection pressure is above the lower threshold and below the upper threshold; an increase injection pattern (PT5) in which the injection amount in the succeeding hole exceeds the lower threshold and falls below the upper threshold and reaches the lower threshold of the injection pressure; and an increase injection pattern (PT6) in which the injection amount in the succeeding hole is up to the upper threshold and the injection pressure falls below the lower threshold.

3. An input unit for inputting the aforementioned multiple thresholds, A creation unit that creates the plurality of injection patterns based on the plurality of thresholds input in the input unit, A control unit that manages the injection of the ground improvement material into the plurality of injection areas, An acquisition unit that acquires data on the amount and pressure of the ground improvement material injected into the plurality of injection areas, A discrimination unit determines the corresponding injection pattern from the plurality of injection patterns created by the creation unit based on the data of the injection amount and injection pressure at the end of injection acquired by the acquisition unit, The system includes a display unit that displays the injection pattern identified by the discrimination unit in an identifiable manner in an area that mimics the multiple injection areas displayed on the management screen, The injection machine according to claim 1, characterized in that, in the case of injection into a leading hole, the control unit stops injection when the injection pressure reaches an upper threshold, and continues injection up to the lower threshold of the injection amount when the injection pressure is below the upper threshold; in the case of injection into a trailing hole, the control unit stops injection when the injection pressure reaches an upper threshold, and continues injection up to the lower threshold of the injection amount when the injection pressure is above the lower threshold and below the upper threshold; continues injection when the injection pressure is below the lower threshold; stops injection when the injection pressure reaches the lower threshold, while continuing injection up to the upper threshold of the injection amount when the injection pressure remains below the lower threshold.

4. The injection machine according to claim 3, characterized in that the display unit illustrates regions that mimic the multiple injection regions for each of the multiple long steel pipes, and displays the injection pattern for each region in a way that makes it identifiable by different colors and / or patterns.

5. A ground reinforcement method using the injection machine described in any one of Claims 1 to 4, The process involves driving multiple long steel pipes into the unexcavated ground of the tunnel, The process involves injecting a ground improvement material into multiple injection regions, each of which is divided longitudinally within the interior of the aforementioned long steel pipe. The process involves inputting multiple threshold values ​​set for both the injection amount and injection pressure of the aforementioned ground improvement material, A step of creating multiple injection patterns based on the input multiple thresholds, A step of determining the corresponding injection pattern from the created injection patterns based on the amount and pressure of the ground improvement material injected when injection into the multiple injection areas is completed, A ground reinforcement method characterized by comprising the step of displaying the identified injection pattern in an identifiable manner in an area that mimics the plurality of injection areas displayed on a management screen.

6. A computer that controls the injector according to any one of claims 1 to 4, A creation process that creates the multiple injection patterns based on the multiple thresholds, An acquisition process to acquire data on the amount and pressure of the ground improvement material injected into the multiple injection areas, Based on the acquired data of the injection volume and injection pressure at the end of the injection, a discrimination process is performed to determine the corresponding injection pattern from the multiple injection patterns created. A program characterized by causing the user to perform a display process that displays the identified injection pattern in an identifiable manner in areas that mimic the multiple injection areas displayed on the management screen.

Images