Mortar injection management system

Abstract

By excluding the high injection pressure measured in the initial stages of pump operation, the final injection pressure of the mortar can be appropriately obtained and controlled. [Solution] A mortar injection management system 1 comprising: an operation switching unit 314 that switches between the operating state and the stopped operation of the mixing pump 3; a pressure sensor 313 that measures the injection pressure of mortar M; and an injection pressure management unit 214 that sequentially updates and stores the maximum injection pressure measured by the pressure sensor 313 from the start of operation of the mixing pump 3 for a specific injection hole 703, resets the stored maximum injection pressure in accordance with the next start of operation of the mixing pump 3, and stores the stored maximum injection pressure as the final injection pressure in accordance with the stop of measurement of the injection pressure of mortar M.

Description

Technical Field

[0001] The present invention relates to a mortar injection management system for managing the injection pressure of mortar when mortar is injected and fixed after inserting a rock bolt into an injection hole in a rock mass.

Background Art

[0002] Conventionally, as a construction method for fixing a rock bolt to a rock mass with mortar injected into an injection hole in the rock mass, there are a pre-injection type in which mortar is injected into the injection hole and then the rock bolt is inserted, and a post-injection type in which a rock bolt is inserted into an injection hole in the rock mass and then mortar is injected into the injection hole for fixing. The post-injection type is a construction method that is often applied when fixing a rock bolt to a rock mass with poor ground conditions.

[0003] In the post-injection type construction method, in order to confirm whether the mortar is properly filled in the injection hole, confirmation of the return of the mortar or pressure management of the injection pressure of the mortar may be performed. For example, in Patent Document 1, after inserting a rock bolt into an injection hole, mortar is injected into a packer to expand it, the packer in the expanded state closes the vicinity of the hole opening of the injection hole, and mortar is injected into the injection hole with the vicinity of the hole opening closed, and the return of the mortar from the exhaust return pipe is confirmed. Then, even after the return is confirmed, the mortar injection is continued, the integrated injection amount and injection pressure of the mortar are recognized from a pressure flow meter installed in the pressure feed hose for pumping the mortar, and when the integrated injection amount of the mortar is equal to or more than the planned injection amount and the injection pressure of the mortar reaches the initial injection pressure + a predetermined additional pressure or more, the mortar injection is stopped.

[0004] Furthermore, Patent Document 1 discloses a configuration in which a pressure flow meter automatically recognizes the integrated injection amount and injection pressure of mortar, recognizes that the integrated injection amount of mortar is equal to or more than the planned injection amount stored and the injection pressure of mortar reaches the initial injection pressure + a predetermined additional pressure stored, and in response thereto, transmits a control command for switching an injection valve from an open state to a closed state or a control command for stopping the operation of pumping the mortar by a pressure feed pump (see paragraph

[0032] of Patent Document 1). [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Patent No. 6869616 [Overview of the project] [Problems that the invention aims to solve]

[0006] For example, when measuring the injection pressure of mortar by installing a pressure sensor on a pumping hose, if time has passed since the previous mortar injection and the mortar has begun to harden inside the pumping hose, or if the mortar injection hole is located at a high position, a high injection pressure exceeding the standard injection pressure may be measured in the initial stages after the pumping pump starts operating. This high injection pressure measured in the initial stages is unrelated to the proper filling of the mortar injection hole and, in fact, hinders the confirmation of proper filling of the mortar injection hole. Therefore, there is a need for a system that can exclude the high injection pressure measured in the initial stages after the pumping pump starts operating and properly manage the final injection pressure of the mortar.

[0007] In view of the above problems, the present invention is proposed to provide a mortar injection management system that can appropriately acquire and manage the final injection pressure of mortar, which serves as judgment information for confirming proper filling of the mortar into the injection hole, by excluding the high injection pressure measured in the initial stage of starting operation of the pumping pump when injecting mortar after inserting rock bolts into injection holes in the ground and fixing them in place. [Means for solving the problem]

[0008] The present invention relates to a mortar injection management system that manages the injection pressure of mortar injected after inserting rock bolts into injection holes in the ground, comprising: a mixing section in which dry mortar is continuously supplied in a fixed quantity, water supplied via a water supply pipe adjusted to achieve the desired mortar properties, a pumping pump section that pumps the mortar produced by mixing the dry mortar and water through a pumping hose to inject the mortar into the injection holes in the ground, an operation switching section that switches the start and stop of the mixing pumping pump, and a unit installed on the pumping hose that measures the injection pressure of the mortar. The system is characterized by comprising: a pressure sensor; a measurement operation switching unit that switches between starting and stopping the measurement of mortar injection pressure; and an injection pressure management unit that, in the injection of mortar into a specific injection hole, sequentially updates the maximum injection pressure measured by the pressure sensor from the start of operation of the mixing pump and stores it in the maximum injection pressure storage unit, resets the maximum injection pressure stored in the maximum injection pressure storage unit in response to the next start of operation of the mixing pump, and stores the maximum injection pressure stored in the maximum injection pressure storage unit as the final injection pressure in response to the stopping of measurement of mortar injection pressure. According to this system, the maximum injection pressure measured by the pressure sensor from the start of operation of the mixing and pumping pump is sequentially updated and stored. When the next mixing and pumping pump starts up, the stored maximum injection pressure is reset, and when the measurement of the mortar injection pressure stops, the stored maximum injection pressure is stored as the final injection pressure. This allows for the proper acquisition and management of the final injection pressure of the mortar, which serves as judgment information for confirming proper filling of the mortar into the injection holes, by excluding the high injection pressure that may be measured in the initial stages of pumping pump operation. Furthermore, if the cycle from the start to the stop of operation of the mixing and pumping pump is divided into multiple cycles, the final injection pressure, which serves as judgment information for confirming proper filling of the mortar into the injection holes, can be properly acquired regardless of which cycle is the last cycle in which the final injection pressure is acquired. Furthermore, in post-injection type mortar pressure injection, for example, it can be adapted to cases where the injection pressure increases after the mixing and conveying pump stops due to an inching operation that instantaneously starts and stops the mixing and conveying pump, allowing for the acquisition of appropriate maximum and final injection pressures.

[0009] The mortar injection management system of the present invention is characterized in that the injection pressure management unit determines whether the injection pressure measured by the pressure sensor is equal to or greater than the set injection pressure, and when the injection pressure measured by the pressure sensor reaches equal to or greater than the set injection pressure, the injection pressure notification unit notifies the system. According to this, by notifying when the measured injection pressure reaches or exceeds the set injection pressure, on-site workers can recognize that the measured injection pressure, which is information for judging whether the mortar is properly filling the injection holes, has reached or exceeds the set injection pressure. Accordingly, on-site workers can judge and take appropriate measures, such as ending the mortar injection or performing one more mortar injection.

[0010] The mortar injection management system of the present invention includes a water flow meter installed in the water supply pipe, a calculation data storage unit that stores a calculation constant corresponding to the type of mortar, a discharge volume calculation formula that calculates the discharge volume by substituting the calculation constant, a correction coefficient, and the amount of supplied water, and an initial value of the correction coefficient, a correction coefficient calculation unit that calculates the cumulative value of the discharge volume by substituting the calculation constant corresponding to the mortar to be used, the initial value of the correction coefficient, and the amount of supplied water for a predetermined time into the discharge volume calculation formula, and calculates the correction coefficient by comparing the actual discharge volume of the mortar to be used for a predetermined time obtained by pre-operating the mixing pump with the cumulative value of the calculated discharge volume, and a correction coefficient storage unit that stores the correction coefficient calculated corresponding to the mortar to be used. The device is characterized by comprising: a set injection amount storage unit that stores the set injection amount of mortar to the injection hole; an integrated discharge volume calculation unit that extracts the calculation constant, the discharge volume calculation formula and the correction coefficient corresponding to the mortar to be used, calculates the calculated discharge volume using the discharge volume calculation formula into which the supply water per unit time taken from the water meter during the operation of the mixing pump that pumps the mortar to be used, the calculation constant and the correction coefficient have been substituted, and calculates the integrated discharge volume by accumulating the calculated discharge volume; and an injection amount management unit that determines whether the integrated discharge volume is equal to or greater than the set injection amount, and notifies the injection amount notification unit when the integrated discharge volume reaches equal to or greater than the set injection amount. According to this, in a configuration where a mixing pump continuously supplies a fixed amount of dry mortar, and water is supplied to the mixing section via a water supply pipe in an adjusted manner to achieve the desired mortar properties, the actual volume of mortar discharged from the mixing pump will usually differ from the standard discharge volume when the amount of water supplied via the water supply pipe increases or decreases. However, by calculating a correction coefficient based on the measured discharge volume of mortar over a predetermined period obtained by pre-operating the mixing pump, and then calculating the calculated discharge volume based on the correction coefficient, the calculated discharge volume can be calculated more accurately. Furthermore, by accumulating the calculated discharge volumes to obtain the cumulative calculated discharge volume, the accurate value of the actual amount of mortar injected into each injection hole can be obtained as the cumulative calculated discharge volume. Then, by determining whether the cumulative calculated discharge volume is equal to or greater than the set injection amount, and by notifying when it reaches or exceeds the set injection amount, it is possible to accurately determine whether the necessary mortar has been injected into the injection holes and notify the on-site workers. Therefore, when injecting mortar into injection holes in the ground using a mixing and pumping pump for ground reinforcement, it is possible to accurately calculate the amount of mortar to be injected into the injection holes, ensure that the necessary amount of mortar is injected into the injection holes, and perform appropriate construction management of mortar injection. Furthermore, by performing management processes for mortar injection pressure and mortar injection volume in parallel, it is possible to recognize cases such as when mortar continues to leak from the injection holes and the injection pressure does not rise even if mortar injection continues beyond the set injection volume, or when the injection pressure becomes too high even if the cumulative discharge volume does not reach the set injection volume, causing an overload on the mixing and pumping pump if further mortar injection is performed.

[0011] The mortar injection management system of the present invention is characterized in that the calculation data storage unit stores the specific gravity of powdered dry mortar corresponding to the type of mortar, and the correction coefficient calculation unit calculates the measured discharge volume of the mortar to be used for a predetermined time from the measured discharge weight of the mortar to be used for a predetermined time obtained by pre-operating the mixing and pumping pump, using the specific gravity of the dry mortar corresponding to the mortar to be used. According to this method, for example, by pre-operating a mixing and pumping pump and measuring the actual discharge weight of the mortar to be used over a predetermined period of time on-site using a weighing scale, the actual discharge volume of the mortar to be used over a predetermined period of time can be easily calculated using the specific gravity of the dry mortar corresponding to the mortar to be used.

[0012] The mortar injection management system of the present invention is characterized by comprising an identification information for injection holes into which mortar is injected, and a construction record storage unit that stores corresponding information for the final injection pressure and the calculated discharge volume for each injection hole. According to this, the final injection pressure and cumulative discharge volume for the injection hole of the identification information can be recorded and retained, and used as a quality control record for mortar injection work.

[0013] The mortar injection management system of the present invention is characterized in that the operating operation switching unit for switching between the operating state and the stopped state of the mixing and pumping pump is provided on the portable terminal. According to this, workers with mobile devices can operate the mixing and pumping pump without being tied to a specific location, thereby improving the overall work efficiency of the mortar injection process. [Effects of the Invention]

[0014] According to the mortar injection management system of the present invention, when injecting and fixing mortar after inserting rock bolts into injection holes in the ground, it is possible to appropriately acquire and manage the final injection pressure of the mortar, which serves as judgment information for confirming proper filling of the mortar into the injection holes, by excluding the high injection pressure measured in the initial stage of starting operation of the pressure pump. [Brief explanation of the drawing]

[0015] [Figure 1] A block diagram showing the overall configuration of a mortar injection management system according to an embodiment of the present invention. [Figure 2] A cross-sectional diagram illustrating the mixing and pumping pump in the embodiment. [Figure 3](a) is a block diagram of a mobile terminal in the mortar injection management system of the embodiment, and (b) is a block diagram of a management recording device in the mortar injection management system of the embodiment. [Figure 4] (a) is a diagram showing an example of a measurement operation switching unit in the embodiment, and (b) is a diagram showing an example of a notification unit in the embodiment. [Figure 5] (a) to (d) are cross-sectional explanatory diagrams for explaining an example of mortar injection into an injection hole where mortar injection management is performed in the mortar injection management system of the embodiment. [Figure 6] A flowchart showing the mortar injection pressure management process in the mortar injection management system of the embodiment. [Figure 7] A flowchart showing the mortar injection amount management process in the mortar injection management system of the embodiment. [Figure 8] An explanatory diagram showing an example of data corresponding to the mortar type stored in the calculation data storage unit in the mortar injection management system of the embodiment.

Embodiments for Carrying Out the Invention

[0016] 〔Mortar Injection Management System of the Embodiment〕 As shown in FIG. 1, the mortar injection management system 1 of the embodiment according to the present invention includes an injection management device 2 composed of a server, a personal computer, or a group of computers connected by a communication line, a kneading and pressure feeding pump 3, a mobile terminal 4 such as a smartphone, a portable dedicated terminal, or a portable personal computer, and a management recording device 5 composed of a server, a personal computer, or a group of computers connected by a communication line. The injection management device 2, the kneading and pressure feeding pump 3, the mobile terminal 4, and the management recording device 5 are communicatively connected via an IoT gateway 6.

[0017] The injection management device 2 includes a control unit 21 such as an MPU or a CPU, a storage unit 22 composed of an HDD, an SSD, a ROM, a RAM, etc., an input unit 23 such as a mouse, a keyboard, a touch panel, etc. responsible for inputting predetermined data such as the type of mortar M to be used, a display unit 24 such as a display, a timer 25 for measuring time, and a communication interface 26 for connecting the injection management device 2 to a communication line.

[0018] In the storage unit 22, there are provided a control program storage unit 221 for storing a control program responsible for controlling the injection management device 2 in cooperation with the control unit 21, a calculation data storage unit 222 for storing calculation constants corresponding to the type of mortar M to be used for calculating the discharge amount of the mortar M, a set injection amount storage unit 223 for storing the set injection amount of the mortar M for the injection hole 703, and a correction coefficient storage unit 224 for storing the correction coefficient calculated corresponding to the mortar M to be used. The type of mortar M corresponding to the calculation constant in the calculation data storage unit 222 is the type of dry mortar DM corresponding to the mortar M to be used (see FIGS. 1 and 2).

[0019] In the calculation data storage unit 222, for example, calculation constants A and B corresponding to the type of mortar M, a discharge volume calculation formula for calculating the discharge volume by substituting the calculation constants A and B, a correction coefficient C, and the supply water volume into, for example, the calculation discharge volume Y = C(A×supply water volume X + B), an initial value of the correction coefficient C such as the numerical value "1", and the specific gravity of the dry mortar DM of the powder corresponding to the type of mortar M are stored (see FIG. 8).

[0020] Furthermore, the memory unit 22 is provided with a set injection pressure storage unit 226 in which the set injection pressure of mortar M for the injection hole 703 is stored, and a maximum injection pressure storage unit 226 in which the maximum injection pressure measured by the pressure sensor 313 from the start of operation of the mixing pump 3 is stored in a manner that is sequentially updated. The maximum injection pressure storage unit 226 stores the maximum injection pressure from the start of operation of the mixing pump 3 in a manner that is sequentially updated when injecting mortar M into a specific injection hole 703, and the maximum injection pressure stored in the maximum injection pressure storage unit 226 is reset when the mixing pump 3 starts up again after the mixing pump 3 has stopped running, and the maximum injection pressure stored in the maximum injection pressure storage unit 226 is stored as the final injection pressure when the measurement of the injection pressure of mortar M stops.

[0021] The control unit 21 works in cooperation with the control program in the control program storage unit 221 and functions as the cumulative discharge volume calculation unit 211, the injection volume management unit 212, the correction coefficient calculation unit 213, and the injection pressure management unit 214. The cumulative discharge volume calculation unit 211 continuously recognizes the amount of water supplied per unit time taken from the water meter 306 when the mixing pump 3 that pumps mortar M is in operation, and extracts calculation constants A, B, etc. and the discharge volume calculation formula from the calculation data storage unit 222 according to the type of mortar M to be used, which is input via the communication line from the mobile terminal 4 or input from the input unit 23, and extracts the stored correction coefficient C from the correction coefficient storage unit 224 and pre-operates the mixing pump 3. Based on the measured discharge volume of the mortar M to be used (the state after mixing dry mortar DM with water), a correction coefficient C is extracted from the correction coefficient storage unit 224. For example, the discharge volume is calculated using the discharge volume calculation formula: Y=C(A × supply water amount X + B), which is obtained by substituting the supply water amount per unit time taken from the water meter 306 during the operation of the mixing pump 3 that pumps the mortar M to be used, the calculated constants A and B, and the correction coefficient C. The calculated discharge volume is then accumulated to calculate the cumulative discharge volume.

[0022] The injection volume management unit 212 compares the cumulative discharge volume calculated by the cumulative discharge volume calculation unit 211 from the start of injection of mortar M into a specific injection hole 703 with the set injection volume and determines whether the cumulative discharge volume is equal to or greater than the set injection volume. Furthermore, if the injection volume management unit 212 determines that the cumulative discharge volume is equal to or greater than the set injection volume, it causes the injection volume notification unit 320q to notify. In this embodiment, if the injection volume management unit 212 determines that the cumulative discharge volume is equal to or greater than the set injection volume, it transmits a determination signal for clearing the set injection volume to the operation control unit 315 so that it is notified by the notification unit 320 provided on the mixing and pumping pump 3. The operation control unit 315, upon receiving the predetermined determination signal, controls the injection volume notification unit 320q to notify that the cumulative discharge volume has reached equal to or greater than the set injection volume (see Figure 4(b)).

[0023] In this example, the notification unit 320 receives a determination signal for clearing the set injection pressure from the injection pressure management unit 215 of the injection management device 2 when it is determined that the measured injection pressure of the mortar M to be used is equal to or greater than the set injection pressure. The operation control unit 315 controls the notification unit 320p to notify that the measured injection pressure of the mortar M to be used has reached when it is determined that the cumulative calculated discharge volume of the mortar M to be used is equal to or greater than the set injection volume. The system includes an injection volume notification unit 320q, which, when received from the quasi-injection volume determination unit 212, notifies the system under the control of the operation control unit 315 that the cumulative calculated discharge volume has reached or exceeded the set injection volume, and an operation operation notification unit 320r, which receives an operation start notification signal and an operation stop notification signal for the kneading pump 3 from the control unit 21 of the injection management device 2, and, under the control of the operation control unit 315, notifies that the pump is in operation when an operation start notification signal is received, and stops notifying that the pump is in operation when an operation stop notification signal is received (see Figures 4 and 1).

[0024] An example of the notification unit 320 shown in Figure 4(b) consists of an injection pressure notification unit 320p, which is a notification lamp that lights up in a predetermined color such as red to notify when the measured injection pressure of the injected mortar M reaches or exceeds a set injection pressure; an injection volume notification unit 320q, which is a notification lamp that lights up in a predetermined color such as yellow to notify when the cumulative calculated discharge volume of the injected mortar M reaches or exceeds a set injection volume; and an operation notification unit 320r, which is a notification lamp that lights up in a predetermined color such as green to indicate that the unit is in operation and turns off when the unit is stopped. The method of notification to the field worker by the notification unit 320, or by the injection pressure notification unit 320p, the injection volume notification unit 320q, and the operation notification unit 320r, is appropriate. For example, notification can be given by using lamps with appropriate differences in light color or by turning them on and off, or by using a speaker to give sound, or by combining lamps and sound.

[0025] The correction coefficient calculation unit 213 calculates the cumulative value of the calculated discharge volume by substituting, for example, the calculation constants A and B corresponding to the mortar M to be used, the initial value of the correction coefficient C "1", and the amount of water supplied for a predetermined time into the discharge volume calculation formula: Y=C(A × amount of water supplied X + B), and then compares the measured discharge volume of the mortar M to be used for a predetermined time, obtained by pre-operating the mixing and pumping pump 3, with the cumulative value of the calculated discharge volume to calculate the correction coefficient C.

[0026] Furthermore, the correction coefficient calculation unit 213 calculates the measured discharge volume of the mortar M to be used for a predetermined time, using the specific gravity of the dry mortar DM corresponding to the mortar M to be used, which is stored in the calculation data storage unit 222, from the measured discharge weight of the mortar M to be used for a predetermined time obtained by pre-operating the mixing and pumping pump 3. This measured discharge volume is used in comparison with the cumulative value of the calculated discharge volume to calculate the correction coefficient C.

[0027] When obtaining the measured discharge amount of mortar M to be used over a predetermined time, for example, input from the input unit 23 allows selection of the mortar type of dry mortar DM corresponding to the mortar M to be used and the calibration mode. The mixing and pumping pump 3 is operated for a predetermined time, such as 30 seconds, to mix the dry mortar DM and water W under the same conditions as when the mortar M is pumped in, thereby producing the mortar M. The produced mortar M is then collected in a container 321. The weight of the mortar M collected in the container 321 is measured by a weighing scale 322, and the measured value of the measured discharge weight over the predetermined time is obtained. The obtained measured discharge weight is input to the injection management device 2 from the input unit 23, and by inputting calibration execution from the input unit 23, the correction coefficient calculation unit 213 performs processing such as calculating the correction coefficient C (see Figures 1 and 2).

[0028] The injection pressure management unit 214, when injecting mortar M into a specific injection hole 703, sequentially updates the maximum injection pressure measured by the pressure sensor 313 from the start of operation of the mixing pump 3 and stores it in the maximum injection pressure storage unit 226. When the mixing pump 3 is stopped and the next mixing pump 3 is started, the unit resets the maximum injection pressure stored in the maximum injection pressure storage unit 313, and when the measurement of the injection pressure of mortar M stops, it stores the maximum injection pressure stored in the maximum injection pressure storage unit 226 as the final injection pressure.

[0029] In this embodiment, the injection pressure management unit 214, in the measurement state, stores the maximum injection pressure measured by the pressure sensor 313 in order to sequentially update it in response to the reception of an operation start signal from the operation control unit 315 of the mixing and pumping pump 3. After the mixing and pumping pump 3 has stopped operating, the unit resets the maximum injection pressure stored in the maximum injection pressure storage unit 226 in response to the reception of the next operation start signal from the operation control unit 315 of the mixing and pumping pump 3, and stores the maximum injection pressure measured by the pressure sensor 313 in order to sequentially update it in response to the reception of a measurement stop signal from the operation control unit 315 that turns off the measurement operation, and stores the maximum injection pressure stored in the maximum injection pressure storage unit 226 as the final injection pressure.

[0030] Furthermore, the injection pressure management unit 214 determines whether the injection pressure measured by the pressure sensor 313 is equal to or greater than the set injection pressure, and when the measured injection pressure of the pressure sensor 313 reaches equal to or greater than the set injection pressure, it causes the injection pressure notification unit 320p to notify.In this embodiment, the injection pressure management unit 214 determines whether the injection pressure measured by the pressure sensor 313 is equal to or greater than the set injection pressure, and when it determines that the measured injection pressure of the pressure sensor 313 is equal to or greater than the set injection pressure, it transmits a determination signal for clearing the set injection pressure to the injection pressure notification unit 320p, and the operation control unit 315 controls the injection pressure notification unit 320p to notify when the measured injection pressure of the mortar M to be used has reached equal to or greater than the set injection pressure.

[0031] Furthermore, if there is a risk that the high injection pressure measured in the initial stages of the pump operation will reach the set injection pressure, the injection pressure management unit 214 may, in the injection of mortar M into a specific injection hole 703, after a predetermined set time has elapsed from the start of injection pressure measurement or the start of operation of the first mixing pump 3, determine whether the injection pressure measured by the pressure sensor 313 is equal to or greater than the set injection pressure, and execute a process to notify the injection pressure notification unit 320p if the injection pressure measured by the pressure sensor 313 reaches equal to or greater than the set injection pressure.

[0032] As shown in Figure 2, the mixing and pumping pump 3 has a funnel-shaped hopper 301 and a cylindrical section 304 that is formed to extend in a straight line and is connected internally to the discharge port 302 of the hopper 301 and to the water inlet 303 located closer to the tip than the discharge port 302. The cylindrical section 304 is inclined so that the tip is lower. A water supply pipe 305 is connected to the water inlet 303 to supply water W, and a water flow meter 306 is installed on the water supply pipe 305.

[0033] Inside the cylindrical section 304, there is a stirring blade 307 for dry mixing of dry mortar DM, and a stirring rod 308 connected axially to the stirring blade 307. A motor 309 located at the rear of the cylindrical section 304 allows the stirring blade 307 and the stirring rod 308 to rotate. Dry mortar DM, introduced into the cylindrical section 304 from the discharge port 302 of the hopper 301, is carried to the front end of the cylindrical section 304 by the rotation of the stirring blade 307, and mixed with water W supplied through the water supply pipe 305 and injected from the water inlet 303 by the rotation of the stirring rod 308. The part where the stirring rod 308 rotates corresponds to the mixing section 310, where dry mortar DM is continuously supplied in a fixed quantity. Water W is supplied to the mixing section 310 via the water supply pipe 305, adjusted to achieve the desired mortar properties.

[0034] The mortar M, produced by mixing dry mortar DM and water W, is further agitated in a pressurized pump unit 311, where it is mixed by the rotation of a metal screw rotor within a rubber inner spiral stator, and then pumped through a pressurized hose 312. A pressure sensor 313 is installed on the pressurized hose 312.

[0035] The mixing and pumping pump 3 is equipped with an operation switching unit 314 that switches the operating state of the mixing and pumping pump 3 between operation and stop, and causes the operation control unit 315 to send operation start signals and operation stop signals to the injection management device 2, and an operation control unit 315 that controls the drive of the mixing and pumping pump 3 according to the input of the operation switching unit 314 (see Figure 1). The water volume meter 306, pressure sensor 313, and operation control unit 315 installed on the mixing and pumping pump 3 are connected to a communication line via a communication interface 316 and communicate with the injection management device 2 via an IoT gateway 6. In addition, the operation control unit 315 is communicated with a mobile terminal 4 via the IoT gateway 6. The injection management device 2 receives the operation start and operation stop signals for mortar injection output from the operation control unit 315 of the mixing and pumping pump 3 via the communication line.

[0036] Furthermore, the mixing and pumping pump 3 is equipped with a measurement operation switching unit 330 that switches the start and stop of measurement of the injection pressure of mortar M measured by the pressure sensor 313, and the start and stop of measurement of the supply water amount measured by the water volume meter 306 to calculate the cumulative discharge volume, thereby switching the ON state and OFF state of a predetermined measurement operation (see Figures 1 and 4). When the measurement operation switching unit 330 is set to the ON state, a measurement start signal is transmitted from the operation control unit 315 to the injection management device 2, and the cumulative discharge volume calculation unit 211 and the injection volume management unit 212 perform predetermined processing on the mortar injection amount, while in parallel, the injection pressure management unit 214 performs predetermined processing on the mortar injection pressure.

[0037] The measurement operation switching unit 330 in Figure 4(a) switches between a pre-injection mode in which mortar M is injected into the injection hole 703 before the lock bolt 704 is inserted, and a post-injection mode in which mortar M is injected into the injection hole 703 after the lock bolt 704 has been inserted and the vicinity of the hole opening has been closed by, for example, an expanded packer 705. The unit includes a mode switching switch 330p which transmits a selection signal for the pre-injection mode and a selection signal for the post-injection mode from the operation control unit 315 to the injection management device 2, a measurement start switch 330q which transmits a measurement start signal from the operation control unit 315 to the injection management device 2 to turn on the measurement operation in response to the input, and a measurement stop switch 330r which transmits a measurement stop signal from the operation control unit 315 to the injection management device 2 to turn off the measurement operation in response to the input.

[0038] As shown in Figure 3(a), the mobile terminal 4 comprises a control unit 41 such as a CPU, a storage unit 42 composed of ROM, RAM, flash memory, etc., an input unit 43 such as a touch panel, mouse, keyboard, etc., a display unit 44 such as a touch panel, display, etc., which also serves as the input unit 33, and a communication interface 45 for connecting the mobile terminal 4 to a communication line. The storage unit 42 is provided with a control program storage unit 421 that stores a control program that works in cooperation with the control unit 41 to control the mobile terminal 4.

[0039] The mobile terminal 4 is connected to the injection management device 2 and the mixing and pumping pump 3 via the communication interface 45 and the IoT gateway 6. When the injection pressure management unit 215 of the injection management device 2 determines that the set injection pressure has been cleared and sends a determination signal to the mobile terminal 4, or when it determines that the set injection amount has been cleared and sends a determination signal to the mobile terminal 4, the control unit 41 of the mobile terminal 4 displays the information that the set injection pressure has been cleared or the information that the set injection amount has been cleared in a predetermined format upon receiving the determination signal. Furthermore, when the mobile terminal 4 transmits the mortar type to the injection management device 2, the injection management device 2 receives the mortar type transmitted to the injection management device 2 via the input unit 43 of the mobile terminal 4, and the control unit 21 of the injection management device 2 uses the received mortar type to execute a predetermined process of the cumulative discharge volume calculation unit 211.

[0040] The mobile terminal 4 may also be equipped with an operation operation switching unit 411 that performs the same function as the operation operation switching unit 314 that switches the operating state and operation stop of the mixing pump 3. In addition to a configuration in which both the operation operation switching unit 314 of the mixing pump 3 and the operation operation switching unit 411 of the mobile terminal 4 are provided, a configuration in which only the operation operation switching unit 411 of the mobile terminal 4 is provided is also suitable. For example, the operation operation switching unit 411 of the mobile terminal 4 transmits an operation start signal and an operation stop signal to the mixing pump 3 in response to input from the input unit 43. The operation control unit 315 of the mixing pump 3 starts operation of the mixing pump 3 and transmits an operation start signal to the injection management device 2 in response to receiving an operation start signal from the mobile terminal 4, and stops operation of the mixing pump 3 and transmits an operation stop signal to the injection management device 2 in response to receiving an operation stop signal from the mobile terminal 4.

[0041] As shown in Figure 3(b), the management record device 5 comprises a control unit 51 such as a CPU, a storage unit 52 composed of ROM, RAM, etc., an input unit 53 such as a mouse or keyboard, an output unit 54 such as a display or printer, and a communication interface 55 that connects the management record device 5 to a communication line. The storage unit 52 is provided with a control program storage unit 521 that stores a control program that works in cooperation with the control unit 51 to control the management record device 5, a construction record storage unit 522, and an output format storage unit 523 that stores output formats such as report formats.

[0042] The construction record storage unit 522 stores, in correspondence, identification information such as the identification number of the injection hole 703 into which mortar M is injected, which is input from the input unit 53 of the management record device 5, the input unit 23 of the injection management device 2, or the input unit 43 of the mobile terminal 4, and the final injection pressure and cumulative discharge volume for the injection hole 703 of the identification information, which are acquired by the injection management device 2 for the injection hole 703 of the identification information and transmitted to the management record device 5 via the communication line. In addition, the identification information such as the identification number of the injection hole 703 into which the mortar M to be used is injected may be automatically assigned by increasing the number, for example, in response to the measurement start input from the input unit 23 of the injection management device 2, and the identification information such as the identification number of the injection hole 703 assigned by the injection management device 2 may be transmitted to the management record device 5. Alternatively, in response to the input of the measurement start switch 330q of the measurement operation switching unit 330, a measurement start signal may be transmitted from the operation control unit 315 of the kneading pump 3 to the injection management device 2. Upon receiving the measurement start signal, the injection management device 2 may automatically assign identification information, such as by increasing the number, and transmit the identification information, such as the identification number of the injection hole 703, assigned by the injection management device 2 to the management recording device 5.

[0043] The mortar injection management system 1 of this embodiment is performed on post-injection type constructions in which rock bolts 704 are inserted into injection holes 703 in the ground 701 and then mortar M is injected and fixed. For example, it is performed on post-injection type constructions in which mortar is injected into the injection holes 703 shown in Figure 5 using a pressure hose 312 and a packer 705. In the example in Figure 5, sprayed concrete 702 is sprayed onto the inner circumference of the ground 701 of the tunnel, and injection holes 703 are formed by drilling from the inner circumference of the tunnel.

[0044] A cloth, bag-shaped packer 705 is fitted around the base of the rock bolt 704, which is driven into the injection hole 703. A portion of the pressure hose 312 is routed along the longitudinal direction of the rock bolt 704, and most of the exhaust return pipe 706 is routed along the longitudinal direction of the rock bolt 704. The packer 705 is positioned near the base of the rock bolt 704, so as to enclose the rock bolt 704, the pressure hose 312, and the exhaust return pipe 706 together, and is attached by fastening both longitudinal ends of the rock bolt 704 with fastening bands. The pressure hose 312 is provided so as to be able to inject the mortar M to be used into the packer 705 and the injection hole 703. A discharge port for the mortar M is provided protruding from the packer 705 toward the tip of the rock bolt 704, and a notched opening is formed inside the packer 705 that has a larger opening area than the discharge port.

[0045] In this example, when injecting mortar into the injection hole 703, a lock bolt 704 to which a bag-shaped packer 705, a pressure hose 312, and an exhaust return pipe 706 are attached is inserted into the injection hole 703 from the tip side. Mortar is injected using the mixing and pumping pump 3 and the pressure hose 312, and mortar M is released from the notched opening of the pressure hose 312 inside the packer 705, causing the packer 705 to expand and the expanded packer 705 to first close the vicinity of the injection hole 703. After that, mortar M is injected into the injection hole 703 whose vicinity is closed by the expanded packer 705, and air inside the injection hole 703 is discharged from the exhaust return pipe 706. Mortar injection is continued until exhaust from the exhaust return pipe 706 is finished and the mortar M returns from the exhaust return pipe 706 to the space on the inner circumference side of the tunnel. Ultimately, the pressure-injected mortar M penetrates into the gaps surrounding the injection holes 703 (see Figures 5(a) to (d)).

[0046] Then, in the injection management process of the mortar injection management system 1, as shown in Figure 6, when the post-injection mode is selected by input to the mode switching switch 330p of the measurement operation switching unit 330, a post-injection mode selection signal is transmitted from the operation control unit 315 of the mixing and pumping pump 3 to the injection management device 2, and the control unit 21 of the injection management device 2 enters a state in which it executes processing in post-injection mode in response to the reception of the post-injection mode selection signal (S101). Furthermore, in response to input to the measurement start switch 330q of the measurement operation switching unit 330, the operation control unit 315 of the mixing and pumping pump 3 transmits a measurement start signal to the injection management device 2 to turn on the measurement operation, and the control unit 21 of the injection management device 2 enters a state in which it executes predetermined processing to calculate the cumulative discharge volume by measuring the injection pressure of the mortar M using the pressure sensor 313 and the supply water volume using the water volume meter 306 (S102).

[0047] Next, when the operation switching unit 314 receives input to start operation of the mixing and pumping pump 3, the mixing and pumping pump 3 starts operating and injecting mortar M into the injection hole 703 corresponding to specific identification information. Simultaneously, the operation control unit 315 transmits an operation start signal to the injection management device 2. The injection pressure management unit 215 of the injection management device 2, upon receiving the operation start signal from the operation control unit 315 of the mixing and pumping pump 3, resets the maximum injection pressure if the maximum injection pressure is stored in the maximum injection pressure storage unit 228. Furthermore, the injection pressure management unit 215 or the control unit 21 transmits an operation start notification signal to the operation control unit 315 of the mixing and pumping pump 3. The operation control unit 315, upon receiving the operation start notification signal, notifies the operation is in progress using the operation notification unit 320r (S103). In this case, identification information such as the identification number of the injection hole 703 where mortar is injected may be stored in advance by the injection management device 2, or it may be automatically assigned by the injection pressure management unit 215 of the injection management device 2 in response to the receipt of the measurement start signal.

[0048] The injection pressure management unit 215 continuously receives and recognizes the injection pressure measured by the pressure sensor 313 of the mortar M being pumped through the pressure hose 312, records it sequentially in a predetermined storage area of ​​the storage unit 22, and acquires the maximum injection pressure measured by the pressure sensor 313 since the start of operation of the mixing and pumping pump 3, updating it sequentially, and stores it in the maximum injection pressure storage unit 228 (S104).

[0049] Subsequently, when the operation switching unit 314 receives input to stop the operation of the mixing and pumping pump 3, the operation of the mixing and pumping pump 3 is stopped for the injection hole 703 corresponding to the specific identification information, and the injection of mortar M is stopped. At the same time, the operation control unit 315 transmits an operation stop signal to the injection management device 2, and the injection pressure management unit 215 or control unit 21 transmits an operation stop notification signal to the operation control unit 315 of the mixing and pumping pump 3. In response to receiving the operation stop notification signal, the operation control unit 315 notifies that the operation has stopped by turning off the operation notification unit 320r (S105).

[0050] Furthermore, when the operation switching unit 314 receives input for the next start of operation of the mixing and pumping pump 3, the operation of the mixing and pumping pump 3 is started for the injection hole 703 corresponding to specific identification information, and the injection of mortar M begins. At the same time, the operation control unit 315 transmits an operation start signal to the injection management device 2, and the injection pressure management unit 215 of the injection management device 2 resets the maximum injection pressure stored in the maximum injection pressure storage unit 228 in response to receiving the operation start signal from the operation control unit 315 of the mixing and pumping pump 3. Furthermore, the injection pressure management unit 215 or the control unit 21 transmits an operation start notification signal to the operation control unit 315 of the mixing and pumping pump 3, and the operation control unit 315 notifies that the pump is in operation using the operation notification unit 320r in response to receiving the operation start notification signal (S106).

[0051] The injection pressure management unit 214 determines whether the injection pressure measured by the pressure sensor 313 is equal to or greater than the set injection pressure, and if it determines that the injection pressure measured by the pressure sensor 313 is equal to or greater than the set injection pressure, it transmits a determination signal that the set injection pressure has been cleared to the injection pressure notification unit 320p (S107). In response to receiving the determination signal that the set injection pressure has been cleared, the operation control unit 315 of the mixing pump 3 notifies the injection pressure notification unit 320p that the injection pressure measured by the pressure sensor 313 has reached equal to or greater than the set injection pressure.

[0052] Furthermore, when the operation switching unit 314 receives input to stop the operation of the mixing and pumping pump 3, the operation of the mixing and pumping pump 3 is stopped for the injection hole 703 corresponding to specific identification information, and the injection of mortar M is stopped. At the same time, the operation control unit 315 transmits an operation stop signal to the injection management device 2, and the injection pressure management unit 215 or control unit 21 transmits an operation stop notification signal to the operation control unit 315 of the mixing and pumping pump 3. In response to receiving the operation stop notification signal, the operation control unit 315 notifies that the operation is stopped by turning off the operation notification unit 320r (S108).

[0053] Here, when the on-site worker determines that the injection of mortar M into a specific injection hole 703 is sufficient, the measurement stop switch 330r of the measurement operation switching unit 330 is activated. In response to the input of the measurement stop switch 330r of the measurement operation switching unit 330, the operation control unit 315 of the mixing and pumping pump 3 transmits a measurement stop signal to the injection management device 2 to turn off the measurement operation. In response to the receipt of the measurement stop signal, the injection pressure management unit 214 of the injection management device 2 stops the execution of predetermined processes that measure the injection pressure of mortar M using the pressure sensor 313 and the amount of water supplied using the water meter 306 to calculate the cumulative discharge volume, and stores the maximum injection pressure stored in the maximum injection pressure storage unit 226 as the final injection pressure (S109).

[0054] Furthermore, in the injection management process of the mortar injection management system 1 of this embodiment, a management process for the amount of mortar injected is performed independently in parallel with the management process for the mortar injection pressure. That is, as shown in Figure 7, as a pre-processing step, the correction coefficient calculation unit 213 of the injection management device 2 calculates the measured discharge volume of the mortar M to be used for a predetermined time from the measured discharge weight of the mortar M to be used at a predetermined time, which is obtained by pre-operating the mixing and pumping pump 3 and measuring it with the weighing scale 322, and the specific gravity of the dry mortar DM corresponding to the type of mortar to be used, which is stored in the calculation data storage unit 222 (S201).

[0055] Furthermore, the correction coefficient calculation unit 213 calculates the integrated value of the calculated discharge volume by substituting, for example, the calculation constants A and B corresponding to the mortar M to be used, the initial value "1" of the correction coefficient C, and the amount of water supplied for a predetermined time into the discharge volume calculation formula, compares the actual discharge volume of the mortar M to be used for a predetermined time with the integrated value of the calculated discharge volume, calculates the correction coefficient C, and stores the calculated correction coefficient C in the correction coefficient storage unit 224 (S202).

[0056] Next, after the processing described in S101 to S102 above, the cumulative discharge volume calculation unit 211 of the injection management device 2 receives an operation start signal from the operation control unit 315 of the mixing pump 3, and continuously receives and takes in the measured value of the supply water amount from the water meter 306 when the mixing pump 3 that pumps the mortar M is in operation. For example, it extracts the calculation constants A and B corresponding to the mortar M to be used, the discharge volume calculation formula: Y=C(A × supply water amount X + B), and the calculated correction coefficient C. Using the discharge volume calculation formula into which the supply water amount per unit time taken from the water meter 306 when the mixing pump 3 that pumps the mortar M to be used is substituted, the calculated discharge volume is calculated, and the calculated discharge volume is accumulated to calculate the cumulative calculated discharge volume (S203).

[0057] Furthermore, the method by which the cumulative discharge volume calculation unit 211 extracts the calculation constants A and B corresponding to the mortar M to be used, the discharge volume calculation formula: Y=C(A × supply water amount X + B), and the calculated correction coefficient C can be either by extracting the calculation constants A and B, the discharge volume calculation formula: Y=C(A × supply water amount X + B), and the calculated correction coefficient C from the storage unit 22, or by extracting the discharge volume calculation formula: Y=C(A × supply water amount X + B), in which the calculation constants A and B and the calculated correction coefficient C have already been substituted, from a predetermined storage area of ​​the storage unit 22.

[0058] The injection volume management unit 212 of the injection management device 2 continuously determines whether the cumulative calculated discharge volume is equal to or greater than the set injection volume (S204). If the cumulative calculated discharge volume is equal to or greater than the set injection volume, it transmits a determination signal indicating that the set injection volume has been cleared to the operation control unit 315, which controls the injection volume notification unit 320q provided on the mixing and pumping pump 3, thereby causing the injection volume notification unit 320q to notify (S205).

[0059] On-site workers can check the notification status from the injection pressure notification unit 320p and the injection volume notification unit 320q, and then make appropriate decisions to take, for example, to finish injecting mortar or to inject mortar one more time. The injection management device 2 also transmits the identification information of the injection hole 703 and the corresponding data such as the final injection pressure and the cumulative discharge volume, stored in the memory unit 22, to the management recording device 5 via the communication line, and the management recording device 5 stores this data in the construction record storage unit 522. When necessary, the management recording device 5 displays or prints the identification information of the injection hole 703 and the corresponding data in a predetermined output format in the output unit 54 in response to an output request input from the input unit 53.

[0060] According to the mortar injection management system 1 of this embodiment, the maximum injection pressure measured by the pressure sensor 313 from the start of operation of the mixing and pumping pump 3 is sequentially updated and stored. The stored maximum injection pressure is reset in accordance with the next start of operation of the mixing and pumping pump 3, and the maximum injection pressure stored in accordance with the cessation of measurement of the injection pressure of mortar M is stored as the final injection pressure. This allows for the appropriate acquisition and management of the final injection pressure of mortar M, which serves as judgment information for confirming proper filling of the injection hole 703, by excluding the high injection pressure that may be measured in the initial stages of pumping pump operation. Furthermore, if the cycle from the start to the stop of operation of the mixing and pumping pump 3 is divided into multiple cycles, the final injection pressure, which serves as judgment information for confirming proper filling of the injection hole 703, can be appropriately acquired regardless of which cycle is the final cycle in which the final injection pressure is acquired. Furthermore, in post-injection type mortar pressure injection, for example, it can be adapted to cases where the injection pressure increases after the mixing and conveying pump 3 stops due to an inching operation that instantaneously starts and stops the mixing and conveying pump 3, and it is possible to obtain appropriate maximum injection pressure and final injection pressure.

[0061] Furthermore, by notifying the pressure sensor 313 when the mortar injection pressure measured by the pressure sensor reaches or exceeds the set injection pressure, on-site workers can recognize that the measured injection pressure, which is information for determining whether the mortar M is properly filled into the injection hole 703, has reached or exceeds the set injection pressure. Accordingly, on-site workers can decide and take appropriate measures, such as ending the injection of mortar M or performing one more injection of mortar.

[0062] Furthermore, by calculating a correction coefficient C based on the measured discharge volume of mortar M obtained over a predetermined time by pre-operating the mixing and pumping pump 3, and then calculating the calculated discharge volume based on the correction coefficient C, the calculated discharge volume can be calculated more accurately. Moreover, by accumulating the calculated discharge volumes to obtain the cumulative calculated discharge volume, the accurate value of the actual amount of mortar M injected into each injection hole 703 can be obtained as the cumulative calculated discharge volume. Then, by determining whether the cumulative calculated discharge volume is equal to or greater than the set injection amount, and by notifying when it reaches or exceeds the set injection amount, it is possible to accurately determine whether the necessary amount of mortar M has been injected into the injection holes 703 and notify the on-site workers.Therefore, when injecting mortar M into the injection holes 703 of the ground 701 with the mixing and pumping pump 3 for ground reinforcement, the amount of mortar M to be injected into the injection holes 703 can be accurately calculated, the necessary amount of mortar M to be injected into the injection holes 703 can be reliably injected, and appropriate construction management of mortar injection can be carried out.

[0063] Furthermore, by performing management processes for mortar injection pressure and mortar injection volume in parallel, it becomes possible to recognize cases such as when mortar injection continues beyond the set injection volume but mortar M continues to leak from the injection hole 703 and the injection pressure does not rise, or when the injection pressure becomes too high even if the cumulative discharge volume does not reach the set injection volume, causing an overload on the mixing and pumping pump 3, etc., if any further mortar injection is performed.

[0064] Furthermore, when calculating the actual discharge volume of mortar M to be used over a predetermined period of time, the actual discharge weight of mortar M to be used over a predetermined period of time obtained by pre-operating the mixing and pumping pump 3 is measured on-site using a weighing scale 322, and the actual discharge volume of mortar M to be used can be easily calculated by using the specific gravity of the dry mortar DM corresponding to the mortar M to be used in the calculation.

[0065] Furthermore, by storing identification information of the injection holes 703 into which mortar M is injected, along with the final injection pressure and calculated discharge volume for these injection holes 703, in the construction record storage unit 522, the final injection pressure and calculated discharge volume for the injection holes 703 can be recorded and retained, and used as a quality control record for the mortar injection work.

[0066] Furthermore, if the operating operation switching unit 411 for switching between the operating state and the stopped state of the mixing and pumping pump 3 is provided on the portable terminal 4, the worker holding the portable terminal 4 can operate the mixing and pumping pump 3 without being tied to a specific location, thereby improving the overall work efficiency of the mortar injection work.

[0067] [Scope of the invention disclosed herein] The inventions disclosed herein include, in addition to the inventions and embodiments listed herein, the inventions disclosed herein also include, to the extent applicable, those that modify the partial content of these inventions to include other content disclosed herein, or those that add other content disclosed herein to these inventions, or those that delete the partial content to the extent that partial effects are obtained and define them as broader concepts. Furthermore, the inventions disclosed herein also include the following and modifications.

[0068] For example, in the mortar injection management system of the present invention, the calculation constant corresponding to the mortar type of dry mortar DM, the correction coefficient based on the measured discharge volume of mortar M, and the discharge volume calculation formula can be any other than those shown in the above embodiment, as long as they can accurately calculate the cumulative discharge volume of mortar M. Furthermore, the mortar injection management system of the present invention also includes systems that perform only one of either the mortar injection pressure management process or the mortar injection volume management process.

[0069] Furthermore, in the mortar injection management system 1 of the above embodiment, the control unit 21 of the injection management device 2 may output information indicating that the standard has been met when it determines that the injection pressure measured by the pressure sensor 313 is equal to or greater than the set injection pressure, or when it determines that the cumulative calculated discharge volume is equal to or greater than the set injection volume, or when it determines that the injection pressure measured by the pressure sensor 313 is equal to or greater than the set injection pressure and the cumulative calculated discharge volume is equal to or greater than the set injection volume. This information indicating that the standard has been met can be output by, for example, transmitting the information to the mobile terminal 4 so that the information indicating that the standard has been met is displayed on the mobile terminal 4, or transmitting the information indicating that the standard has been met is displayed on the recording management device 5 and the mobile terminal 4, or displaying it on the display unit 24 of the injection management device 2, or appropriately combining both of these transmission outputs and display outputs.

[0070] Furthermore, if the construction management condition is that the final injection pressure of the mortar injection is equal to or greater than the initial pressure plus a predetermined additional pressure, the control unit 21 of the injection management device 2 may determine whether the final injection pressure is equal to or greater than the initial pressure plus a predetermined additional pressure stored in the storage unit 22, and depending on the determination result, store in the storage unit 22 information indicating that the condition injection pressure has been met and information indicating that the condition injection pressure has not been met, or transmit output to the management recording device 5 for storage in the construction record storage unit 522. [Industrial applicability]

[0071] This invention can be used, for example, when injecting mortar into injection holes formed in the ground of a tunnel. [Explanation of symbols]

[0072] 1…Mortar Injection Management System 2…Injection Management Device 21…Control Unit 211…Cumulative Discharge Volume Calculation Unit 212…Injection Volume Management Unit 213…Correction Coefficient Calculation Unit 214…Injection Pressure Management Unit 22…Storage Unit 221…Control Program Storage Unit 222…Calculation Data Storage Unit 223…Set Injection Volume Storage Unit 224…Correction Coefficient Storage Unit 225…Set Injection Pressure Storage Unit 226…Maximum Injection Pressure Storage Unit 23…Input Unit 24…Display Unit 25…Timer 26…Communication Interface 3…Mixing and Pumping Pump 301…Hopper 302…Discharge Port 303…Water Inlet 304…Cylinder Section 305…Water Supply Pipe 306…Water Volume Meter 307…Agitator Blade 308…Agitator Rod 309…Motor 310…Mixing Section 311…Pumping Pump Section 312…Pumping Hose 313…Pressure sensor 314…Operation switching unit 315…Operation control unit 316…Communication interface 320…Notification unit 320p…Injection pressure notification unit 320q…Injection volume notification unit 320r…Operation notification unit 321…Container 322…Weighing scale 330…Measurement operation switching unit 330p…Mode switching switch 330q…Measurement start switch 330r…Measurement stop switch 4…Mobile terminal 41…Control unit 411…Operation switching unit 42…Storage unit 421…Control program storage unit 43…Input unit 44…Display unit 45…Communication interface 5…Management recording device 51…Control unit 52…Storage unit 521…Control program storage unit 522…Construction record storage unit 523…Output format storage unit 53…Input unit 54…Output unit 55…Communication interface 6…IoT gateway 701…Ground 702...Sprayed concrete 703...Injection hole 704...Rock bolt 705...Packer 706...Exhaust return pipe DM...Dry mortar M...Mortar W...Water

Claims

1. A mortar injection management system that controls the injection pressure of mortar injected after inserting rock bolts into injection holes in the ground, A mixing pump is used to continuously supply dry mortar in a fixed quantity to a mixing section, to which water is supplied via a water supply pipe and adjusted to achieve the desired mortar properties, and to pump the mortar produced by mixing the dry mortar and water through a pumping hose in a pumping pump section, and to inject the mortar into injection holes in the ground. The aforementioned mixing and pumping pump includes an operation switching unit that switches between starting and stopping operation, A pressure sensor installed in the aforementioned pumping hose to measure the injection pressure of mortar, A measurement operation switching unit that switches between starting and stopping the measurement of mortar injection pressure, A mortar injection management system comprising: an injection pressure management unit that, in the injection of mortar into a specific injection hole, sequentially updates the maximum injection pressure measured by the pressure sensor from the start of operation of the mixing and pumping pump and stores it in a maximum injection pressure storage unit; resets the maximum injection pressure stored in the maximum injection pressure storage unit in response to the next start of operation of the mixing and pumping pump; and stores the maximum injection pressure stored in the maximum injection pressure storage unit as the final injection pressure in response to the cessation of measurement of the mortar injection pressure.

2. The mortar injection management system according to claim 1, characterized in that the injection pressure management unit determines whether the injection pressure measured by the pressure sensor is equal to or greater than the set injection pressure, and causes the injection pressure notification unit to notify when the injection pressure measured by the pressure sensor reaches equal to or greater than the set injection pressure.

3. A water meter installed in the aforementioned water supply pipe, A calculation data storage unit stores a calculation constant corresponding to the type of mortar, a discharge volume calculation formula in which the calculation constant, a correction coefficient, and the amount of supplied water are substituted to calculate the discharge volume, and an initial value of the correction coefficient. A correction coefficient calculation unit calculates the cumulative value of the calculated discharge volume by substituting the calculation constant corresponding to the mortar to be used, the initial value of the correction coefficient, and the amount of water supplied for a predetermined time into the discharge volume calculation formula, and compares the cumulative value of the calculated discharge volume with the actual discharge volume of the mortar to be used for a predetermined time obtained by pre-operating the mixing pump, A correction coefficient storage unit stores the correction coefficient calculated in accordance with the mortar used, A set injection amount storage unit stores the set amount of mortar to be injected into the injection hole, A cumulative discharge volume calculation unit extracts the calculation constant, the discharge volume calculation formula, and the correction coefficient corresponding to the mortar to be used, calculates the calculated discharge volume using the discharge volume calculation formula into which the supply water per unit time taken from the water meter during the operation of the mixing pump that pumps the mortar to be used, the calculation constant, and the correction coefficient have been substituted, and calculates the cumulative discharge volume by accumulating the calculated discharge volume, A mortar injection management system according to claim 1 or 2, comprising: an injection amount management unit that determines whether the cumulative calculated discharge volume is equal to or greater than the set injection amount, and causes the injection amount notification unit to notify when the cumulative calculated discharge volume reaches equal to or greater than the set injection amount.

4. The calculation data storage unit stores the specific gravity of the powdered dry mortar corresponding to the type of mortar, The mortar injection management system according to claim 3, characterized in that the correction coefficient calculation unit calculates the measured discharge volume of the mortar to be used for a predetermined time from the measured discharge weight of the mortar to be used for a predetermined time obtained by pre-operating the mixing and pumping pump, using the specific gravity of the dry mortar corresponding to the mortar to be used.

5. The mortar injection management system according to claim 3, characterized by comprising an identification information for injection holes into which mortar is injected, and a construction record storage unit that stores corresponding information for the final injection pressure and the calculated discharge volume for the injection holes identified by the identification information.

6. The mortar injection management system according to claim 1 or 2, characterized in that the operating operation switching unit for switching between the operating state and the stopped operation of the mixing and pumping pump is provided in the portable terminal.

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