Self-repairing device and method for repairing cracks in underground engineering

Abstract

The present invention provides a self-repairing device and method for repairing cracks in underground projects. The device comprises a steel grouting pipe, which is arranged inside the wall of the underground project; a plurality of sound wave transmitters are arranged around the wall of the underground project; a sound wave receiver is installed on the steel grouting pipe; the inlet of the steel grouting pipe is connected to a slurry storage tank; a spring switch vibration sensor is installed on the steel grouting pipe and above the sound wave receiver; a normally closed solenoid valve is installed at the upper end of the steel grouting pipe; a grouting discharge pipe is installed at the bottom end of the steel grouting pipe; a gravity sensing switch and a normally closed solenoid valve are installed at the bottom end of the steel grouting pipe; the steel grouting pipe is connected to an electric grouting pump for grouting, which is used to pump a mixture of epoxy resin latent curing agent and magnetic epoxy resin cement slurry into the steel grouting pipe. The device improves the repair speed of cracks in underground engineering structures, meets the needs of actual projects, and solves the problem that traditional construction methods cannot solve the problem of difficulty in repairing cracks in underground engineering structures.

Description

Technical Field

[0001] The present invention relates to the technical field of underground engineering crack repair, and in particular to a self-repairing device and method for repairing underground engineering cracks. Background Art

[0002] In today's society, as the development of above-ground structures encounters increasing limitations and bottlenecks, underground engineering is experiencing a corresponding growth. However, the environment in which underground projects operate presents challenges for the maintenance and repair of these structures. For example, crack repair within underground structures presents a significant challenge. Therefore, the rapid repair of cracks in underground structures has long been a major concern for researchers. Summary of the Invention

[0003] The purpose of the present invention is to provide a self-repairing device and method for repairing cracks in underground engineering structures. The present invention adopts a mixture of epoxy resin latent curing agent and magnetic epoxy resin cement slurry, which is pumped into a steel grouting pipe through an electric grouting pump to repair cracks in underground engineering structures. The mixture can reduce the temperature of the curing system and increase the curing speed, thereby greatly improving the repair speed of cracks in underground engineering structures, meeting the needs of actual projects, and solving the problem that traditional construction methods cannot solve the difficulties in repairing cracks in underground engineering structures.

[0004] In order to achieve the above-mentioned technical features, the purpose of the present invention is achieved as follows: a self-repairing device for repairing cracks in underground projects, which includes a steel grouting pipe, which is arranged inside the wall of the underground project; a plurality of sound wave transmitters are arranged around the wall of the underground project, and a sound wave receiver is installed on the steel grouting pipe; the inlet of the steel grouting pipe is connected to the slurry storage tank; a spring switch vibration sensor is installed on the steel grouting pipe and above the sound wave receiver; a normally closed solenoid valve is installed at the upper end of the steel grouting pipe; a grouting unloading pipe is installed at the bottom end of the steel grouting pipe; a gravity sensing switch and a normally closed solenoid valve are installed at the bottom end of the steel grouting pipe; the steel grouting pipe is connected to an electric grouting pump used for grouting, which is used to pump a mixture of epoxy resin latent curing agent and magnetic epoxy resin cement slurry into the steel grouting pipe.

[0005] The steel grouting pipes are arranged at equal intervals in the walls of the underground project during the construction of the underground project, and a plurality of grouting holes are provided at equal intervals from top to bottom of the steel grouting pipes.

[0006] The acoustic wave transmitter uses the different propagation speeds of acoustic waves in intact, undamaged solid media and in defective, damaged solid media to monitor the location of cracks in underground engineering structures.

[0007] The acoustic wave receiver is used to receive the signal from the acoustic wave transmitter. When there are cracks in the underground engineering structure, the signal emitted by the acoustic wave transmitter will cause the acoustic wave receiver to vibrate slightly.

[0008] The slurry storage tank is used to store the excess magnetic epoxy resin cement slurry delivered to the steel grouting pipe and to discharge the excess magnetic epoxy resin cement slurry in the steel grouting pipe;

[0009] The spring switch vibration sensor is an electronic switch used to receive micro-vibrations sent by a sound wave receiver, sense the magnitude of the vibration force, transmit the sensing result to the circuit device, and start the circuit to work.

[0010] The solenoid valve opens when the coil of the normally closed solenoid valve is energized and closes when the coil is de-energized. The solenoid valve in the pipeline is closed for a long time when no signal is received, thereby reducing the moisture and gas in the air from entering the steel grouting pipe and reducing the chance of corrosion of the steel grouting pipe and underground engineering structures.

[0011] The grouting pipe is used to discharge the excess magnetic epoxy resin cement slurry in the steel grouting pipe into the slurry storage tank.

[0012] The gravity sensing switch is an electronic switch that senses the gravity when the weight of the magnetic epoxy resin cement slurry in the steel grouting pipe reaches the designed value, and transmits the sensing result to the circuit device to start the circuit.

[0013] After the gravity sensing switch starts the working electronic switch, the normally closed solenoid valve coil is energized and the solenoid valve opens, and the excess magnetic epoxy resin cement slurry in the steel grouting pipe is transported to the slurry storage tank through the slurry unloading pipe; when the magnetic epoxy resin cement slurry in the steel grouting pipe is unloaded, the gravity acting on the gravity sensing switch returns to the initial design value, and then the electronic switch working in the circuit is turned off, further closing the normally closed solenoid valve.

[0014] The magnetic strips are evenly arranged in the underground engineering structure during pouring or masonry, thereby ensuring sufficient magnetic attraction to attract the magnetic epoxy resin cement slurry in the steel grouting pipe.

[0015] The electric grouting pump adopts a WSB piston grouting pump.

[0016] A method for repairing underground engineering cracks using the self-repairing device for repairing underground engineering cracks comprises the following steps:

[0017] Step 1: Design a steel grouting pipe that meets the requirements based on the size requirements of the actual underground engineering structure;

[0018] Step 2: Install an acoustic wave receiver and a spring switch vibration sensor on a steel grouting pipe that meets the requirements of the actual project;

[0019] Step 3: Install the normally closed solenoid valves on the outside of the top and bottom ends of the steel grouting pipe, and then install the gravity sensor switch inside the lower end of the steel grouting pipe;

[0020] Step 4: Install the grouting pipe at the normally closed solenoid valve interface at the bottom of the steel grouting pipe;

[0021] Step 5: When constructing or pouring the underground engineering structure, evenly arrange the magnetic strips and evenly bury the steel grouting pipes with all the installed devices in the underground engineering structure;

[0022] Step 6: After the underground engineering structure is completed, install the acoustic wave transmitters around it;

[0023] Step 7: Connect the steel grouting pipe and the electric grouting pump, and connect the grouting pipe to the grouting tank tightly;

[0024] Step 8: Stir the mixture of epoxy resin latent curing agent and magnetic epoxy resin cement slurry in the slurry storage tank thoroughly. When the micro-vibration emitted by the acoustic wave receiver is received, the electronic switch of the entire circuit is activated to pump the slurry into the steel grouting pipe.

[0025] The present invention has the following beneficial effects:

[0026] 1. The magnetic epoxy resin cement slurry used in the present invention can realize anti-gravity grouting anchoring, guided flow, increased slurry density, and real-time regulation of slurry viscosity, which can meet the engineering filling requirements of anti-tilting cracks and defects. Under the driving force of grouting pressure, a large number of bubbles will not be introduced, and the slurry density can be greatly guaranteed.

[0027] 2. The steel grouting pipes used in the present invention not only pump the mixed slurry into the cracks, but also act as structural columns when evenly buried in underground engineering structures, thereby enhancing the integrity and stability of the building and being connected with the ring beams of each floor to form a space frame capable of resisting bending and shearing, which is a strong and effective measure to prevent the collapse of underground engineering structures.

[0028] 3. The acoustic wave transmitter and acoustic wave receiver used in the present invention can accurately and quickly send and receive signals, reflecting the location of cracks in underground engineering structures, greatly improving the speed and accuracy of underground engineering crack repair.

[0029] 4. The epoxy resin latent curing agent and the magnetic epoxy resin cement slurry used in the present invention work together to increase the coagulation and curing speed of the cement slurry, thereby accelerating the repair speed of cracks in underground engineering structures.

[0030] 5. The normally closed solenoid valve used in the present invention controls the mixed slurry to enter the steel grouting pipe on the one hand, and on the other hand, the solenoid valve in the pipeline is closed for a long time when no signal is received, thereby reducing the moisture, oxygen and other gases in the air from entering the steel grouting pipe, reducing the chance of corrosion of the steel grouting pipe and underground engineering structures.

[0031] 6. The gravity sensing switch used in the present invention can discharge the excess mixed slurry in the steel grouting pipe. On the one hand, it can ensure that the steel grouting pipe can continue to be used normally. On the other hand, the discharged mixed slurry can continue to be used, which reduces the project cost to a certain extent.

[0032] 7. The magnetic strips used in the present invention are evenly arranged in the underground engineering structure during casting or masonry, which can ensure sufficient magnetic attraction to attract the mixed slurry in the steel grouting pipe, and to a certain extent reduce the probability of cracks not being filled. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below with reference to the accompanying drawings and examples.

[0034] Figure 1 It is a schematic diagram of the steel grouting pipe of the present invention.

[0035] Figure 2 It is a schematic diagram of the local layout of the underground engineering structure of the present invention.

[0036] Figure 3 Schematic diagram of the vibration sensing receiving device of the present invention.

[0037] Figure 4 This is a schematic diagram of the overall device of the steel grouting pipe of the present invention.

[0038] Figure 5 This is a schematic diagram of the mixed magnetic epoxy resin cement slurry of the present invention.

[0039] Figure 6 It is a schematic diagram of the grouting device of the present invention.

[0040] Figure 7 This is a schematic diagram of the layout of the steel grouting pipe of the present invention.

[0041] Figure 8 Schematic diagram of crack grouting according to the present invention.

[0042] In the figure: steel grouting pipe 1, sound wave transmitter 2, sound wave receiver 3, slurry storage tank 4, spring switch vibration sensor 5, normally closed solenoid valve 6, slurry unloading pipe 7, epoxy resin latent curing agent 8, magnetic epoxy resin cement slurry 9, gravity sensing switch 10, magnetic strip 11, electric grouting pump 12. DETAILED DESCRIPTION

[0043] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0044] Example 1:

[0045] See also Figure 1-8 , a self-repairing device for repairing cracks in underground projects, which includes a steel grouting pipe 1, which is arranged inside the wall of the underground project; a plurality of sound wave transmitters 2 are arranged around the wall of the underground project, and a sound wave receiver 3 is installed on the steel grouting pipe 1; the inlet of the steel grouting pipe 1 is connected to the slurry storage tank 4; a spring switch vibration sensor 5 is installed on the steel grouting pipe 1 and above the sound wave receiver 3; a normally closed solenoid valve 6 is installed at the upper end of the steel grouting pipe 1; a grouting unloading pipe 7 is installed at the bottom end of the steel grouting pipe 1; a gravity sensing switch 10 and a normally closed solenoid valve 6 are installed at the bottom end of the steel grouting pipe 1; the steel grouting pipe 1 is connected to an electric grouting pump 12 for grouting, which is used to pump a mixture of epoxy resin latent curing agent 8 and magnetic epoxy resin cement slurry 9 into the steel grouting pipe 1. By using the above-mentioned self-repairing device, acoustic wave transmitters are installed around the underground engineering structure and magnetic strips are evenly arranged when the wall is built or poured. Then, a steel grouting pipe equipped with an acoustic wave receiver is buried in the underground engineering structure. The different propagation speeds of acoustic waves in intact and undamaged solid media and in defective and damaged solid media are used to monitor the location of the gaps in the underground engineering structure, causing the acoustic wave receiver on the steel grouting pipe to vibrate slightly, thereby acting on the spring switch vibration sensor installed above the acoustic wave receiver. After the spring switch vibration sensor senses the magnitude of the vibration force, it transmits the sensing result to the circuit device and activates the electronic switch of the circuit to pump the mixture of epoxy resin latent curing agent and magnetic epoxy resin cement slurry into the cracks in the underground engineering structure. The mixed cement slurry used in the present invention can quickly and accurately repair cracks in underground engineering structures, can meet the engineering filling requirements of reverse-tilt cracks and defects, will not introduce a large number of bubbles under the driving force of grouting pressure, and the density of the slurry can be greatly guaranteed. The construction process is clear, the construction speed is fast, the crack repair effect is good, and it has broad engineering practice significance and application prospects.

[0046] Furthermore, the steel grouting pipe 1 is evenly spaced in the wall of the underground project during the construction of the underground project, and a plurality of grouting holes are evenly spaced from top to bottom of the steel grouting pipe 1. The plurality of grouting holes ensure that the magnetic epoxy resin cement slurry 9 can be delivered to the gap, thereby accelerating the speed of repairing the cracks in the project.

[0047] Furthermore, the acoustic wave transmitter 2 utilizes the different propagation speeds of acoustic waves in intact, undamaged solid media and in defective, damaged solid media to monitor the location of cracks in underground engineering structures, thereby ensuring that cracks can be repaired more accurately and quickly in the future.

[0048] Furthermore, the acoustic wave receiver 3 is used to receive the signal from the acoustic wave transmitter 2. When there is a crack in the underground engineering structure, the signal from the acoustic wave transmitter 2 will cause the acoustic wave receiver 3 to generate micro-vibration, thereby accurately identifying the location of the crack.

[0049] Furthermore, the slurry storage tank 4 is used to store the excess magnetic epoxy resin cement slurry 9 transported to the steel grouting pipe 1 and to discharge the excess magnetic epoxy resin cement slurry 9 in the steel grouting pipe 1 .

[0050] Furthermore, the spring switch vibration sensor 5 is an electronic switch used to receive the micro-vibration emitted by the sound wave receiver 3, and then sense the magnitude of the vibration force to transmit the sensing result to the circuit device to start the circuit to work.

[0051] Furthermore, the solenoid valve 6 opens when the coil is energized, and closes when the coil is de-energized. The solenoid valve in the pipeline is closed for a long time when no signal is received, thereby reducing the moisture and gas in the air from entering the steel grouting pipe 1 and reducing the chance of corrosion of the steel grouting pipe 1 and underground engineering structures.

[0052] Furthermore, Epoxy Resin Latent Curing Agent 8 is an ultrafine, high-purity, modified latent curing agent. It increases compatibility with epoxy resins, while also lowering the curing system temperature and increasing the curing speed. This significantly increases the speed of repairing cracks in underground engineering structures, meeting practical engineering needs.

[0053] Furthermore, the magnetic epoxy resin cement slurry 9 can realize anti-gravity grouting anchoring, guided flow, increase slurry density, and real-time regulation of slurry viscosity, which can meet the engineering filling requirements of anti-tilt cracks and defects. Under the drive of grouting pressure, a large number of bubbles will not be introduced, and the slurry density can be greatly guaranteed.

[0054] Furthermore, the grouting pipe 7 is used to discharge the excess magnetic epoxy resin cement slurry 9 in the steel grouting pipe 1 into the slurry storage tank 4. The grouting pipe 7 has a resource-saving effect.

[0055] Furthermore, the gravity sensing switch 10 is an electronic switch that senses the gravity when the weight of the magnetic epoxy resin cement slurry 9 in the steel grouting pipe 1 reaches the design value. After sensing the gravity, the gravity sensing switch 10 transmits the sensing result to the circuit device and starts the circuit to work. After the gravity sensing switch 10 starts working, the coil of the normally closed solenoid valve 6 is energized and the solenoid valve opens, and the excess magnetic epoxy resin cement slurry 9 in the steel grouting pipe 1 is transported to the slurry storage tank 4 through the slurry discharge pipe 7. After the magnetic epoxy resin cement slurry 9 in the steel grouting pipe 1 is discharged, the gravity on the gravity sensing switch 10 returns to the initial design value, and then the electronic switch of the circuit is turned off, further closing the normally closed solenoid valve 6. The gravity sensing switch 10 facilitates the realization of an automated grouting process.

[0056] Furthermore, the magnetic strips 11 are evenly arranged during the pouring or masonry of the underground engineering structure, thereby ensuring sufficient magnetic attraction to attract the magnetic epoxy resin cement slurry 9 in the steel grouting pipe 1. This effectively reduces the probability of the magnetic epoxy resin cement slurry 9 failing to fill the cracks.

[0057] Furthermore, the electric grouting pump 12 adopts a WSB piston grouting pump. It has the advantages of compact structure, good sealing, high pressure, easy piston replacement, simple assembly and maintenance, convenient pressure and flow adjustment, and long service life. This ensures the subsequent normal grouting process and the best grouting effect.

[0058] Example 2:

[0059] A method for repairing underground engineering cracks using the self-repairing device for repairing underground engineering cracks comprises the following steps:

[0060] Step 1: Design a steel grouting pipe 1 that meets the requirements based on the size requirements of the actual underground engineering structure;

[0061] Step 2: Install an acoustic wave receiver 3 and a spring switch vibration sensor 5 on a steel grouting pipe 1 that meets the requirements of the actual project;

[0062] Step 3: Install the normally closed solenoid valve 6 on the outside of the top and bottom ends of the steel grouting pipe 1 respectively, and then install the gravity sensor switch 10 on the inside of the lower end of the steel grouting pipe 1;

[0063] Step 4: Install the grouting pipe 7 at the interface of the normally closed solenoid valve 6 at the bottom end of the steel grouting pipe 1;

[0064] Step 5: When the underground engineering structure is being built or poured, the magnetic strips 11 are evenly arranged, and the steel grouting pipes 1 with all the devices installed are evenly buried in the underground engineering structure;

[0065] Step 6: After the underground engineering structure is completed, install the acoustic wave transmitter 2 around it;

[0066] Step 7: Connect the pipes between the steel grouting pipe 1 and the electric grouting pump 12, and connect the grouting pipe 7 to the grouting tank 4 tightly;

[0067] Step 8: Fully stir the mixture of epoxy resin latent curing agent 8 and magnetic epoxy resin cement slurry 9 in the slurry storage tank 4. When the micro-vibration emitted by the sound wave receiver 3 is received, the electronic switch of the entire circuit is started to pump the slurry into the steel grouting pipe 1.

[0068] The mechanism of action of the present invention is:

[0069] A self-repairing device and method for repairing cracks in underground structures employs acoustic wave transmitters installed around the structure and magnetic strips evenly distributed during masonry or wall construction. Steel grouting pipes equipped with acoustic wave receivers are then embedded within the structure. The device utilizes the different propagation speeds of acoustic waves in intact, undamaged solid media compared to those in defective or damaged solid media to monitor the location of cracks within the structure. This in turn causes the acoustic wave receivers on the steel grouting pipes to microvibrate, which in turn activates a spring-switch vibration sensor mounted above the acoustic wave receiver. The spring-switch vibration sensor senses the vibration force and transmits the result to a circuit device, activating an electronic switch that pumps a mixture of epoxy resin latent curing agent and magnetic epoxy resin cement slurry into the cracks within the structure. Furthermore, the uniformly embedded steel grouting pipes within the structure act as structural columns, enhancing the building's integrity and stability. They connect to the ring beams of each floor, forming a spatial framework resistant to bending and shearing, providing a powerful and effective means of preventing the collapse of underground structures. Magnetic epoxy resin cement slurry with epoxy resin latent curing agent can quickly and accurately repair cracks in underground engineering structures, meet the engineering filling requirements of reverse tilt cracks and defects, and will not introduce a large number of bubbles under the grouting pressure. The density of the slurry can be greatly guaranteed. The construction process is clear, the construction speed is fast, and the crack repair effect is good. It has broad engineering practice significance and application prospects.

Claims

1. A self-repairing device for repairing cracks in underground engineering, characterized by: It comprises a steel grouting pipe (1), which is arranged inside the wall of an underground project; a plurality of sound wave transmitters (2) are arranged around the wall of the underground project, and a sound wave receiver (3) is installed on the steel grouting pipe (1); the inlet of the steel grouting pipe (1) is connected to a slurry storage tank (4); a spring switch vibration sensor (5) is installed on the steel grouting pipe (1) and above the sound wave receiver (3); a normally closed electromagnetic valve (6) is installed at the upper end of the steel grouting pipe (1); a slurry discharge pipe (7) is installed at the bottom end of the steel grouting pipe (1); a gravity sensing switch (10) and a normally closed electromagnetic valve (6) are installed at the bottom end of the steel grouting pipe (1); the steel grouting pipe (1) is connected to an electric grouting pump (12) for grouting, which is used to pump a mixed liquid of epoxy resin latent curing agent (8) and magnetic epoxy resin cement slurry (9) into the steel grouting pipe (1); The acoustic wave transmitter (2) utilizes the different propagation speeds of acoustic waves in intact, undamaged solid media and in defective, damaged solid media to monitor the location of cracks in underground engineering structures; The acoustic wave receiver (3) is used to receive the signal from the acoustic wave transmitter (2). When there is a crack in the underground engineering structure, the signal emitted by the acoustic wave transmitter (2) will cause the acoustic wave receiver (3) to generate micro-vibration; The slurry storage tank (4) is used to store the excess magnetic epoxy resin cement slurry (9) transported to the steel grouting pipe (1) and to discharge the excess magnetic epoxy resin cement slurry (9) in the steel grouting pipe (1); The spring switch vibration sensor (5) is used to receive the micro-vibration emitted by the sound wave receiver (3), and then sense the magnitude of the vibration force, and transmit the sensing result to the electronic switch of the circuit device to start the circuit.

2. A self-repairing device for repairing cracks in underground engineering according to claim 1, characterized in that: The steel grouting pipe (1) is arranged at equal intervals in the wall of the underground project during the construction of the underground project, and the steel grouting pipe (1) is provided with a plurality of grouting holes at equal intervals from top to bottom.

3. The self-repairing device for repairing cracks in underground engineering according to claim 1, characterized in that: The solenoid valve (6) is opened when the coil is energized and closed when the coil is de-energized. The solenoid valve in the pipeline is closed for a long time when no signal is received, thereby reducing the moisture and gas in the air from entering the steel grouting pipe (1), and reducing the probability of corrosion of the steel grouting pipe (1) and underground engineering structures.

4. The self-repairing device for repairing cracks in underground engineering according to claim 1, characterized in that: The grouting pipe (7) is used to discharge excess magnetic epoxy resin cement slurry (9) in the steel grouting pipe (1) into the slurry storage tank (4).

5. The self-repairing device for repairing cracks in underground engineering according to claim 1, characterized in that: The gravity sensing switch (10) is an electronic switch that senses the gravity and transmits the sensing result to the circuit device to start the circuit when the weight of the magnetic epoxy resin cement slurry (9) in the steel grouting pipe (1) reaches the designed value. After the gravity sensing switch (10) starts the working electronic switch, the coil of the normally closed electromagnetic valve (6) is energized and the electromagnetic valve is opened, and the excess magnetic epoxy resin cement slurry (9) in the steel grouting pipe (1) is transported to the slurry storage tank (4) through the slurry discharge pipe (7); after the magnetic epoxy resin cement slurry (9) in the steel grouting pipe (1) is discharged, the gravity acting on the gravity sensing switch (10) returns to the initial design value, and then the electronic switch of the circuit is turned off, further closing the normally closed electromagnetic valve (6).

6. The self-repairing device for repairing cracks in underground engineering according to claim 1, characterized in that: The magnetic strips (11) are evenly arranged in the underground engineering structure during pouring or masonry, thereby ensuring sufficient magnetic attraction to attract the magnetic epoxy resin cement slurry (9) in the steel grouting pipe (1).

7. The self-repairing device for repairing cracks in underground engineering according to claim 1, characterized in that: The electric grouting pump (12) adopts a WSB piston grouting pump.

8. A method for repairing underground engineering cracks using the self-repairing device for repairing underground engineering cracks according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Design a steel grouting pipe (1) that meets the requirements based on the size requirements of the actual underground engineering structure; Step 2: Install an acoustic wave receiver (3) and a spring switch vibration sensor (5) on a steel grouting pipe (1) that meets the requirements of the actual project; Step 3: Install the normally closed solenoid valve (6) on the outside of the top and bottom ends of the steel grouting pipe (1), and then install the gravity sensor switch (10) on the inside of the lower end of the steel grouting pipe (1); Step 4: Install the grouting pipe (7) at the interface of the normally closed solenoid valve (6) at the bottom end of the steel grouting pipe (1); Step 5: When the underground engineering structure is being built or poured, the magnetic strips (11) are evenly arranged, and the steel grouting pipes (1) with all the devices installed are evenly buried in the underground engineering structure; Step 6: After the underground engineering structure is completed, install the acoustic wave transmitter (2) around it; Step 7: Connect the pipes between the steel grouting pipe (1) and the electric grouting pump (12), and at the same time, tightly connect the grouting pipe (7) to the grouting tank (4); Step 8: The mixture of epoxy resin latent curing agent (8) and magnetic epoxy resin cement slurry (9) is fully stirred in the slurry storage tank (4). When the spring switch vibration sensor (5) receives the micro-vibration emitted by the sound wave receiver (3), the electronic switch of the entire circuit is activated to pump the slurry into the steel grouting pipe (1).

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