Grout injection management device, grout injection management method and program

Abstract

To inject an appropriate amount of grout material into a gap having liquid in at least a part of the space.SOLUTION: A grout material injection management device 100 is formed between a foundation pile 4a and a transition piece 4b. When injecting grout material into a gap having liquid in at least a part of the space, the grout material injection management device 100 injects the grout material into the gap while excluding the liquid present in the gap until the liquid is replaced with the grout material, and calculates the amount of liquid in the gap and / or the amount of grout material injected into the gap, to output information according to the calculation result.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to techniques for injecting grout into gaps. [Background technology]

[0002] When various grout materials such as mortar are injected into gaps between structures, it is important to manage the injection amount.For example, Patent Document 1 describes that a pressure sensor for measuring the grout injection pressure, a flow meter for measuring the flow rate of injected grout per unit time, and an integrating flow meter for measuring the integrated amount over time are installed between the pressure pump and the grout injection port of the cable sheath, and the time transition of the measurement data outputted from these pressure sensor, flow meter, and integrating flow meter is displayed on a display. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-133397 Summary of the Invention [Problem to be solved by the invention]

[0004] In structures constructed in coastal areas or offshore, the bottom of the gap into which grout is to be injected may be below the water surface, and part of the gap may contain water (liquid). When grout is injected into such a gap containing liquid, part of the injected grout becomes cloudy with the liquid in the gap. Therefore, even if an amount of grout equivalent to the volume of the gap is injected, some of the grout may become cloudy with the liquid or be discharged, potentially preventing the grout from performing its intended function.

[0005] Therefore, an object of the present invention is to make it possible to inject an appropriate amount of grout material into a gap having liquid in at least a portion of the space. [Means for solving the problem]

[0006] In order to solve the above problems, the grout material injection management device according to the present invention is formed between a first structure and a second structure. It is a gap, A gap having liquid in at least a portion of the space a pressure sensor provided in the An injection unit that injects grout material into the gap; Using the pressure from the grout material injected into the gap by the injection unit detected by the pressure sensor, the specific gravity of the liquid and / or the grout material, and the dimension of the gap in the height direction, The method is characterized by comprising a calculation unit that calculates the amount of grout material injected into the gap, and an output unit that outputs information according to the calculation results by the calculation unit.

[0009] The aforementioned Pressure Sensor may be provided at least at the lowermost end of the gap.

[0010] The aforementioned Pressure Sensor may be provided at a plurality of positions spaced apart in the height direction of the gap.

[0011] The first structure is a foundation pile installed from the bottom of the water toward the water surface, and the second structure is a lower connecting member connected to the foundation pile, The aforementioned Pressure Sensor may be provided at a plurality of positions spaced apart in the circumferential direction on the inner peripheral surface of the lower joining member or the outer peripheral surface of the foundation pile.

[0012] The apparatus may further include an injection pressure detection unit that detects the injection pressure of the grout material injected into the gap by the injection unit, and the output unit may output information corresponding to the detected injection pressure.

[0013] The apparatus may further include an injection position detection unit that detects an injection position of the grout material, and the output unit may output information corresponding to the detected injection position.

[0014] The system may be provided with a flow rate detection unit that detects the flow rate of the grout material in the path through which the grout material is pumped into the gap, and the calculation unit may calculate the amount of grout material to be used based on the detected flow rate.

[0015] The apparatus may further include a recording unit that records information relating to the calculated result or the detected result.

[0016] Further, the grout material injection management method according to the present invention includes: The pressure pump A structure formed between the first structure and the second structure It is a gap, Injecting grout into the gap having liquid in at least a portion of the gap. a step in which a pressure sensor provided in the gap detects a pressure from the grout material injected into the gap by the pressure pump; and an information processing device calculates the amount of grout material injected into the gap by the pressure pump using the pressure detected by the pressure sensor, the specific gravity of the liquid and / or the grout material, and the dimension of the gap in the height direction. a calculating step; The information processing device and outputting information according to the result of the calculation in the calculating step.

[0017] In addition, the program according to the present invention is Ko The computer is configured to detect a structure formed between the first structure and the second structure. a process for acquiring the specific gravity of the liquid filling at least a part of the gap and / or the grout material to be injected into the gap; a process for acquiring the dimension in the height direction of the gap; a process for acquiring the pressure from the grout material injected into the gap detected by a pressure sensor provided in the gap; and using the specific gravity acquired in the process for acquiring the specific gravity, the dimension acquired in the process for acquiring the dimension, and the pressure acquired in the process for acquiring the pressure, Calculate the amount of grout injected into the gap process and, a process of outputting information corresponding to the amount of grout material calculated in the calculating process; This is a program for executing the above. [Effects of the Invention]

[0018] According to the present invention, it is possible to check the amount of grout to be injected and the injection status in real time into a gap having liquid in at least a portion of the space, and to inject an appropriate amount of grout. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a diagram showing the overall configuration of a grout material injection management device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a vertical cross-sectional view of the connection portion between the foundation pile and the lower connecting member. [Figure 3] FIG. 10 is a horizontal cross-sectional view of the connection portion between the foundation pile and the lower connecting member. [Figure 4] Enlarged vertical cross-sectional view of the connection between the foundation pile and the lower joint member during grout injection. (a) Situation before grout injection into the gap, (b) Situation after grout injection into the gap has started, and (c) Situation after grout has been filled into the gap. [Figure 5] FIG. 2 is a diagram showing the functional configuration of the grout material injection management device. [Figure 6] FIG. 10 is a diagram illustrating an example of a display on a computer. [Figure 7] FIG. 10 is a diagram illustrating an example of a display on a computer. [Figure 8] FIG. 10 is a diagram illustrating an example of a display on a computer. DETAILED DESCRIPTION OF THE INVENTION

[0020] An example of an embodiment of the present invention will be described. The grout injection management device 100 illustrated in FIG. 1 is an apparatus for injecting grout into gaps between structures. In this grout injection management device 100, grout mixed in a grout manufacturing device 1 is pumped by a pressure pump 2 through a group of transport pipes 3, which correspond to a path for pumping the grout, to an injection port 5 provided in a structure 4. The structure 4 in this embodiment is, for example, a pier or a bottom-mounted offshore wind power generation device, and is mainly composed of foundation piles 4a (first structures) installed from the bottom of the water toward the water surface, and sheath pipes and transition pieces (second structures) corresponding to lower connecting members connected to the foundation piles 4a. Hereinafter, a bottom-mounted offshore wind power generation device will be used as an example, and a transition piece will be used as the lower connecting member. The foundation pile 4a and transition piece 4b both have a hollow cylindrical structure, and the inner diameter of the lower part of the transition piece 4b is larger than the outer diameter of the upper part of the foundation pile 4a, and the transition piece 4b fits into the head of the foundation pile 4a while maintaining a predetermined gap and height. The predetermined gap, which is the space sandwiched between the outer surface of the foundation pile 4a and the inner surface of the transition piece 4b, corresponds to the gap into which grout material is injected.

[0021] A part of the transportation pipeline 3 is configured as a robot arm 6 that bends, rotates, and moves using a joint mechanism. Each joint mechanism of the robot arm 6 is provided with an angle sensor 7 that measures the angle between the two arms before and after the joint mechanism. A PLC (Programmable Logic Controller) 8 controls the operation of the robot arm 6 based on the measurement values ​​of each angle sensor 7. The PLC 8 is connected to a router modem 10 via a wireless communication unit 9a so as to be able to communicate wirelessly.

[0022] The transport pipe 3 is also provided with a pressure sensor 11 that measures the injection pressure of the grout material being pumped through the pipe, and a flow rate sensor 12 that measures the flow rate of the grout material being pumped. The pressure sensor 11 and the flow rate sensor 12 are connected to a router modem 10 via a wireless communication unit 9b. A wireless communication unit 9c that connects data from a pressure sensor 18 (described later) to the router modem 10 is provided at a predetermined position above the water surface of the transition piece 4b. The router modem 10 is connected to an information processing device 13 and a cloud system 15 on a network 14. The information processing device 13 is connected to various peripheral devices such as a display 16 and a printer 17.

[0023] The information processing device 13 includes hardware for implementing a computer, such as a processor, memory, storage, communication device, input device, output device, and buses connecting these. Each function of the information processing device 13 is implemented by loading predetermined software (programs) onto the hardware, such as the processor and memory, causing the processor to perform calculations, control communication via the communication device, acquire data transmitted from other devices, and control at least one of reading and writing data from and to the memory and storage.

[0024] Here, FIG. 2 is a vertical cross-sectional view showing the connection portion between the foundation pile 4a and the transition piece 4b, and FIG. 3 is a horizontal cross-sectional view showing the connection portion. As described above, the foundation pile 4a is a structure installed from the water bottom toward the water surface, and the transition piece 4b is a structure corresponding to the lower connecting member connected to the foundation pile 4a. A gap g is formed between the outer peripheral surface of the foundation pile 4a and the inner peripheral surface of the transition piece 4b. In FIG. 2, S represents the water surface, and at least a portion of the gap g is located below the water surface S. The transition piece 4b is supported by a jack or the like and fitted into the foundation pile 4a driven into the water bottom from above the foundation pile 4a, so at least a portion of the space in the gap g between the transition piece 4b and the foundation pile 4a contains water (liquid).

[0025] A pressure sensor 18 is provided on the inner peripheral surface of the transition piece 4b or the outer peripheral surface of the foundation pile 4a to detect the pressure from the grout material injected into the gap g. As illustrated in Fig. 2, the pressure sensors 18 are provided at least at the lowest end of the gap g, and also at a plurality of positions (four positions in Fig. 3) spaced apart in the circumferential direction of the inner peripheral surface of the transition piece 4b or the outer peripheral surface of the foundation pile 4a, as illustrated in Fig. 3.

[0026] The pressure sensor 18 is connected to the wireless communication unit 9c shown in FIG. 1, and the detected value is transmitted to the information processing device 13 via the router modem 10.

[0027] Figure 4 is an enlarged vertical cross-sectional view of the connection between the foundation pile 4a and the transition piece 4b during grout injection. The state of the interior of the gap g between the foundation pile 4a and the transition piece 4b is shown in chronological order from Figure 4(a) to Figure 4(b) and then to Figure 4(c). Figure 4(a) shows the state of the connection when grout injection begins. At the time of Figure 4(a), the pressure sensor 18 detects the detected value (water pressure value) of the pressure exerted by the liquid in the gap g. The lower end of the gap g is sealed by a seal member 20 made of rubber or the like.

[0028] When grout material is injected into gap g through injection port 5, as shown in FIG. 4(b), grout material G gradually accumulates from the bottom of gap g in the direction of arrow a (upward). Because the bottom is blocked by sealing member 20, water equivalent to the volume of grout material G accumulated in gap g is forced out of the open top of gap g in the direction of arrow b into the hollow of foundation pile 4a. At this time, the portion of grout material G near the top of gap g that has accumulated becomes cloudy with the water in gap g. It is desirable to locate injection port 5 above sealing member 20, so that the height of the grout falling to sealing member 20 is low.

[0029] The detected value of the pressure sensor 18 at this time corresponds to the pressure exerted by the grout G and water present in the gap g. Because the specific gravity of grout is generally greater than that of water, the detected value of the pressure sensor 18 is greater than the detected value in FIG. 4(a). At this time, the amount of grout G injected into the gap g can be determined by monitoring and checking the difference between the detected value in FIG. 4(a) and the specific gravity difference between the liquid in the gap and the grout being injected. Because the pressure sensor 18 is located at the lowest end of the gap g, it is possible to determine the amount of grout G injected from the early stage of injection, compared to, for example, a case in which the pressure sensor 18 is located relatively higher in the gap g.

[0030] When a sufficient amount of grout G is further injected into the gap g through the injection port 5, the entire gap g is filled with grout G, as shown in FIG. 4(c). At this time, the grout G, which is mixed with water in the gap g in FIG. 4(b), is pushed out from the open portion at the top end of the gap g in the direction of arrow b into the hollow portion of the foundation pile 4a. In other words, in FIG. 4(c), the grout G in the gap g is not mixed with water (or the degree of mixing is extremely small). The grout G in this state can perform its original function as grout.

[0031] The detection value of the pressure sensor 18 at this time detects the pressure exerted by the grout material G present in the gap g. In other words, when the specific gravity of the grout material G is s and the height of the gap g is h, the detection value ΣP of the pressure sensor 18 is a value equivalent to s × h. Therefore, by monitoring the detection value of the pressure sensor 18, it is possible to determine whether the gap g has been filled with grout material that is not cloudy with water (or is only slightly cloudy). This determination can be made more accurately by using an appropriate representative value, such as an average value or the minimum value of the detection values ​​of multiple pressure sensors 18. It is also desirable to install a water pressure sensor (not shown) that detects one or more water pressures at approximately the same water depth as the pressure sensor 18 on the outer circumferential surface of the transition piece 4b, and use the detection value of the water pressure sensor to consider the influence of water surface fluctuations due to waves, etc. In this case, too, using a representative value, such as an average value or the minimum value of the detection values ​​of multiple water pressure sensors, can be expected to improve accuracy.

[0032] Fig. 5 is a diagram illustrating an example of the functional configuration of the grout injection management device 100. In Fig. 5, an injection unit 21 is a means for injecting grout material G into a gap g, and is realized by a pressure pump 2, a transport pipe 3, an injection port 5, a PLC 8, etc.

[0033] The grout pressure detection unit 22 is a means for detecting the pressure received from the grout G in the gap g, and is realized by a pressure sensor 18 provided on the inner circumferential surface of the transition piece 4b or the outer circumferential surface of the foundation pile 4a. The detected value by the grout pressure detection unit 22 is transmitted to the information processing device 13 via the wireless communication unit 9c and the router modem 10.

[0034] The injection pressure detection unit 23 is a means for detecting the injection pressure of the grout material G injected into the gap g by the injection unit 21, and is realized by a pressure sensor 11 provided in the transport pipe 3. The detection value by the injection pressure detection unit 23 is transmitted to the information processing device 13 via the wireless communication unit 9b and the router modem 10.

[0035] The flow rate detection unit 24 is a means for detecting the flow rate of the grout material injected into the gap g by the injection unit 21, and is realized by a flow rate sensor 12 provided in the transport pipe 3. The detected value by the flow rate detection unit 24 is transmitted to the information processing device 13 via the wireless communication unit 9b and the router modem 10.

[0036] The injection position detection unit 25 is a means for detecting the grout material G discharge port at the tip of the robot arm 6, that is, the injection position where the grout material is injected from the transport pipe 3, and is realized by the angle sensor 7 provided in the joint mechanism of the robot arm 6 and the individual length and angle of the robot arm 6. The detection value by the injection position detection unit 25 is transmitted to the information processing device 13 via the wireless communication unit 9a and the router modem 10.

[0037] 5, an acquiring unit 131, a calculating unit 132, an output unit 133, and a recording unit 134 are realized by the information processing device 13. The acquiring unit 131 acquires various data from outside the information processing device 13 (for example, the above-mentioned detecting units 22 to 26, etc.).

[0038] The calculation unit 132 calculates the amount of water in the gap g and / or the amount of grout injected into the gap g by the injection unit 21. More specifically, as described with reference to FIGS. 4(a), (b), and (c), the calculation unit 132 calculates the amount of grout G injected into the gap g using the value detected by the grout pressure detection unit 22, the specific gravities of the water and grout, and the height dimension of the gap g. The amount of grout injected into the gap g here refers to the amount of grout that is capable of performing its intended function in the gap g (i.e., not mixed with water or with only a small degree of turbidity) out of the total amount of grout G pumped into the gap g (e.g., the converted value of the flow rate detected by the flow rate detection unit 24). The calculation unit 132 also calculates the amount of grout used based on the flow rate of the grout detected by the flow rate detection unit 24. The amount used here refers to the total amount of grout pumped into the gap g.

[0039] The output unit 133 outputs information according to the calculation results by the calculation unit 132. The output here includes all forms of output, such as display on the display 16, transmission or distribution to the cloud system 15 or other external devices, and printing by the printer 17. The output unit 133 displays the various calculation results by the calculation unit 132 on the display 16 along with their progression over time, either on the same screen or by switching between screens. This allows the worker to visually check in real time the amount of grout material injected, the progress of the injection work, and whether or not there are any abnormalities.

[0040] For example, as illustrated in the upper part of FIG. 6 , the output unit 133 displays on the display 16 the time progression of the result of calculating the amount of grout injected into the gap g using the value detected by the grout pressure detection unit 22, the specific gravity of the water and / or grout, and the height dimension of the gap g. The graph in the upper part of FIG. 6 illustrates the time progression of the amount of grout injected into the gap g, where the amount of grout not mixed with water in the gap g is set to 100. Note that in the graph in the upper part of FIG. 6 , the vertical axis represents "%" and the horizontal axis represents time (min), but the vertical axis may also represent "m³" or "MPa." The output unit 133 may print out a printout showing such time progression from the printer 19, or may transmit and store data showing this time progression to the cloud system 15, etc.

[0041] The output unit 133 also outputs information corresponding to the injection pressure of the grout material detected by the injection pressure detection unit 23. For example, as illustrated in the lower part of FIG. 6, the output unit 133 displays on the display 16 the time transition of the injection pressure of the grout material detected by the injection pressure detection unit 23 together with its control limit value. In the graph in the lower part of FIG. 6, the vertical axis represents the injection pressure (MPa) of the grout material, and the horizontal axis represents time (min). The output unit 133 may also print out from the printer 17 a printed matter displaying the time transition of the injection pressure of the grout material detected by the injection pressure detection unit 23 together with its control limit value, or may transmit data indicating this time transition to the cloud system 15 or the like for storage. Similarly, the output unit 133 may also output information corresponding to the flow rate of the grout material detected by the flow rate detection unit 24.

[0042] Furthermore, the output unit 133 outputs information corresponding to the injection position detected by the injection position detection unit 25. For example, as illustrated in Fig. 7, the output unit 133 may display on the display 16 the posture and tip of the robot arm 6 (i.e., the injection position of the grout material) together with the position of the injection port 5 on a vertical plane (the plane on the left side in the figure), and may also display on the display 16 together with the position of the injection port 5 on a horizontal plane (the plane on the right side in the figure).

[0043] In Figure 6, the recording unit 134 records information regarding the results calculated by the calculation unit 132 and the results detected by the grout material pressure detection unit 22, the injection pressure detection unit 23, the flow rate detection unit 24, and the position detection unit 26.

[0044] The results output or recorded in this way serve as management data for the grout injection work, and can be submitted to the client and other relevant organizations as evidence that the grout injection work has been carried out properly.

[0045] According to the present embodiment described above, it is possible to inject an appropriate amount of grout material into gaps in a structure so that the grout material can perform its intended function.

[0046] The above embodiment may be modified as follows. For example, in the above embodiment, the first structure is a foundation pile installed from the bottom of the water toward the water surface, and the second structure is a lower connecting member connected to the foundation pile. However, the present invention is not limited to this example. The first structure and the second structure may be any structure as long as at least a portion of the gap formed between them contains liquid, and the gap can be a target for injecting grout material.

[0047] Furthermore, in the above embodiment, the pressure sensor 18 (grout pressure detection unit) is provided at the lowest position of the gap g, but this is not limited to this example. For example, the pressure sensors 18 may be provided at multiple positions spaced apart in the height direction of the gap g. In this case, the display 16 may display a screen such as the one shown in FIG. 8. Here, it is assumed that three pressure sensors 18 are provided at intervals in the height direction of the gap g. In FIG. 8, the solid line corresponding to the "lower pressure gauge" indicates the time transition of the detection value of the pressure sensor 18 located at the lowest of the three pressure gauge sensors, the solid line corresponding to the "middle pressure gauge" indicates the time transition of the detection value of the pressure sensor 18 located at the middle of the three pressure gauge sensors, and the solid line corresponding to the "pressure gauge" indicates the time transition of the detection value of the pressure sensor 18 located at the highest of the three pressure gauge sensors. Furthermore, the dashed line corresponding to the "lower control value" is the detection value that the pressure sensor 18 should detect when the amount of grout material calculated from the product of the height dimension of the gap g based on the position of the pressure sensor 18 located at the bottom and the specific gravity of the grout material has accumulated in the gap g; the dashed line corresponding to the "middle control value" is the detection value that the pressure sensor 18 should detect when the amount of grout material calculated from the product of the height dimension of the gap g based on the position of the pressure sensor 18 located at the middle and the specific gravity of the grout material has accumulated in the gap g; and the dashed line corresponding to the "upper control value" is the detection value that the pressure sensor 18 should detect when the amount of grout material calculated from the product of the height dimension of the gap g based on the position of the pressure sensor 18 located at the top and the specific gravity of the grout material has accumulated in the gap g. In the graph of Figure 8, the detection values ​​of each pressure sensor 18 reach the control value at the 40-minute injection time point, which means that at this point, grout material that is not mixed with water has accumulated in the gap g.

[0048] The present invention may also be a grout injection management method for a method of injecting grout into a gap formed between a first structure and a second structure and having liquid in at least a portion of its space, the method comprising the steps of: injecting grout into the gap while removing the liquid present in the gap until the liquid is replaced with grout; calculating the amount of liquid in the gap and / or the amount of grout injected into the gap in the injection step; and outputting information corresponding to the calculation result.The present invention may also be a program for causing a computer in an apparatus for injecting grout into a gap formed between a first structure and a second structure and having liquid in at least a portion of its space to execute the method. [Explanation of symbols]

[0049] 1 Grout manufacturing equipment, 2 Pressure pump, 3 Transport piping, 4 Structure, 4a Foundation pile, 4b Transition piece, 5 Injection port, 6 Robot arm, 7 Angle sensor, 8 PLC, 9a, 9b, 9c Wireless communication unit, 10 Router modem, 11 Pressure sensor, 12 Flow rate sensor, 13 Information processing device, 14 Network, 15 Cloud system, 16 Display, 17 Printer, 18 Pressure sensor, 20 Sealing material, 21 Injection section, 22 Grout material pressure detection section, 23 Injection pressure detection section, 24 Flow rate detection section, 25 Injection position detection section, 131 Acquisition section, 132 Calculation section, 133 Output section, 134 Recording section, S Water surface, g Gap, G Grout material, h Height.

Claims

1. a pressure sensor provided in a gap formed between a first structure and a second structure, the gap having a liquid in at least a portion of the space; an injection unit that injects grout material into the gap; a calculation unit that calculates the amount of grout injected into the gap using the pressure from the grout injected into the gap by the injection unit detected by the pressure sensor, the specific gravity of the liquid and / or the grout, and the dimension of the gap in the height direction; an output unit that outputs information according to the calculation result by the calculation unit; A grout material injection management device comprising:

2. The pressure sensor is provided at least at the lowermost end of the gap.

2. The grout injection management device according to claim 1.

3. The pressure sensors are provided at a plurality of positions spaced apart in the height direction of the gap.

3. The grout material injection management device according to claim 1 or 2.

4. The first structure is a foundation pile installed from the bottom of the water toward the water surface, the second structure is a lower connecting member connected to the foundation pile, The pressure sensors are provided at a plurality of positions spaced apart in the circumferential direction on the inner circumferential surface of the lower joining member or the outer circumferential surface of the foundation pile.

4. The grout material injection management device according to claim 1, wherein the grout material injection management device is a grout material injection management device.

5. An injection pressure detection unit is provided to detect the injection pressure of the grout material injected into the gap by the injection unit, The output unit outputs information corresponding to the detected injection pressure.

5. The grout material injection management device according to claim 1, wherein the grout material injection management device is a grout material injection management device.

6. an injection position detection unit that detects the injection position of the grout material; The output unit outputs information corresponding to the detected injection position.

6. The grout material injection management device according to claim 1, wherein the grout material injection management device is a grout material injection management device.

7. A flow rate detection unit is provided to detect a flow rate of the grout material in a path for pumping the grout material into the gap, The calculation unit calculates the amount of grout used based on the detected flow rate.

7. The grout material injection management device according to claim 1, wherein the grout material injection management device is a grout material injection management device.

8. a recording unit for recording information about the calculated result or the detected result; The grout material injection management device according to any one of claims 1 to 7.

9. A step in which a pressure pump injects grout material into a gap formed between a first structure and a second structure, the gap having liquid in at least a portion of the space; a step in which a pressure sensor provided in the gap detects a pressure from the grout material injected into the gap by the pressure pump; an information processing device calculating an amount of grout material injected into the gap by the pressure pump using the pressure detected by the pressure sensor, the specific gravity of the liquid and / or the grout material, and the dimension of the gap in the height direction; a step of outputting information according to a result of the calculation in the calculating step by the information processing device; A grout material injection management method comprising:

10. A computer comprising: A process of acquiring a specific gravity of a liquid filling at least a portion of a gap formed between the first structure and the second structure and / or a grout material to be injected into the gap; obtaining a height dimension of the gap; A process of acquiring a pressure from the grout material injected into the gap, detected by a pressure sensor provided in the gap; a process of calculating an amount of grout material injected into the gap using the specific gravity acquired in the process of acquiring the specific gravity, the dimensions acquired in the process of acquiring the dimensions, and the pressure acquired in the process of acquiring the pressure; a process of outputting information corresponding to the amount of grout material calculated in the calculating process; A program to execute.

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