Grouting test system capable of controlling dynamic water environment and fracture geometric structure

Abstract

The invention relates to the technical field of geotechnical engineering, and discloses a grouting test system capable of controlling a dynamic water environment and a fracture geometric structure, which comprises a grouting module, a fracture geometric structure control module, a dynamic water control module and a data acquisition module, the grouting module is connected with the fracture geometric structure control module through a grouting pipe; the flowing water control module is connected with the fracture geometric structure control module through a water injection pipe, and the grouting module is used for achieving stable-pressure grouting in the fracture geometric structure control module. Through the combined design of the electric spiral elevator and the 3D printing rough fracture plate, flexible adjustment of fracture width, inclination angle and roughness is realized, rock fractures in different geometric forms can be simulated, the test bed is made of a transparent material, and the diffusion process of slurry in the fractures can be clearly observed in combination with a high-resolution image acquisition device.

Description

Technical Field

[0001] The present invention relates to the technical field of geotechnical engineering, and particularly relates to a grouting test system for controlling the dynamic water environment and fracture geometric structure. Background Art

[0002] In the field of geotechnical engineering, grouting technology is widely used in engineering practices such as fractured rock mass reinforcement, anti-seepage and plugging. However, groundwater often exists in rock fractures. The grouting process in a dynamic water environment is complex and variable, and the geometric shape of rock fractures is difficult to predict. Therefore, affected by factors such as fracture geometry and dynamic water flow velocity, it is difficult to directly observe and effectively control. In the prior art, the research on the fracture grouting test system is mostly limited to fixed dynamic water flow velocity or fractures with simple geometric shapes, and it is difficult to truly reflect the actual situation of complex fracture grouting in a dynamic water environment.

[0003] The study of the diffusion of grout in fractures in a dynamic water environment needs to consider various factors, such as dynamic water flow velocity, dynamic water flow direction, fracture width, fracture roughness and fracture dip angle. Indoor model tests can be used to observe the influence of different dynamic water environments and fracture geometric structures on the grout diffusion law. At present, most of the grouting test simulation devices in a dynamic water environment only set single-factor variables, and the influence of different dynamic water environments and fracture geometric structures is not yet clear. Moreover, traditional fracture grouting test devices cannot accurately record the shape, temperature and pressure changes during the grout diffusion process, and cannot well study the migration law of grout in fractures in a dynamic water environment. Summary of the Invention

[0004] To solve the technical problems proposed in the background art, the present invention provides a grouting test system for controlling the dynamic water environment and fracture geometric structure.

[0005] The present invention is implemented by the following technical solutions: A grouting test system for controlling the dynamic water environment and fracture geometric structure includes a grouting module, a fracture geometric structure control module, a dynamic water control module and a data acquisition module;

[0006] The grouting module is connected to the fracture geometric structure control module through a grouting pipe;

[0007] The dynamic water control module is connected to the fracture geometric structure control module through a water injection pipe,

[0008] Wherein:

[0009] The grouting module is used to achieve stable pressure grouting into the fracture geometric structure control module;

[0010] The fracture geometric structure control module forms a fracture structure with adjustable width, inclination angle and internal roughness;

[0011] The dynamic water control module is used to adjust the flow direction and velocity of dynamic water in the fissures;

[0012] The data acquisition module is used to collect index information during the test.

[0013] Preferably, the grouting module includes an air compressor and a pressure slurry storage tank. The air compressor serves as the pressure source for grouting, enabling stable-pressure grouting. The air compressor is connected to the pressure slurry storage tank through a grouting pipe; the pressure slurry storage tank contains a pressure regulating valve a, a pressure gauge a, a safety valve, a silencer, fixing screws, and a material pipe joint.

[0014] Preferably, the fissure geometric structure control module includes a fissure formation unit for simulating fissures, an angle adjustment unit, and a rough fissure plate unit. Different roughness rough fissure plate units are assembled in the fissure formation unit to simulate different fissure conditions, and the angle adjustment unit is used to adjust the inclination angle of the fissure formation unit;

[0015] Preferably, the fissure formation unit includes a transparent cover plate and a transparent bottom plate. The rough fissure plate unit includes a rough fissure upper plate and a rough fissure lower plate. Among them, the rough fissure upper plate and the rough fissure lower plate are respectively fixed to the transparent cover plate and the transparent bottom plate, and the transparent cover plate and the transparent bottom plate are also connected through a width adjustment mechanism to adjust the fissure width;

[0016] A grouting hole and a water injection hole are provided on the transparent cover plate. The grouting hole is connected to the pressure slurry storage tank through a grouting pipe, and a pressure regulating valve b and a pressure gauge b are equipped on the grouting pipe. The water injection hole is connected to the dynamic water control module;

[0017] An overflow slurry hole is provided on the transparent bottom plate. The overflow slurry hole is connected to a beaker through a pipe, and the waste liquid flowing out during the test is collected by the beaker. A flow control valve c and a flow control valve d are provided at the bottom of the overflow slurry hole.

[0018] Preferably, there are four groups of the angle adjustment units, which are respectively hinged at the four corners of the transparent bottom plate. The angle adjustment unit includes an electric screw lift and a lead screw. Among them, a fixed base is fixedly connected to the bottom of the lead screw, the electric screw lift is installed on the lead screw, and the electric screw lifts in the four angle adjustment units are respectively hinged to the corners of the transparent bottom plate.

[0019] Preferably, it further includes two parallel slide rails, and the four fixed bases are divided into two groups and are respectively slidably installed on the two slide rails.

[0020] Preferably, the dynamic water control module includes a water tank, a flowmeter, and a flow control valve. The flow control valve is used to control the flow velocity of dynamic water in different directions, so as to achieve controllable dynamic water environment. The water tank is connected to the water injection holes on the transparent cover plate through a water injection pipe. By controlling different flow control valves, the flow direction and flow velocity of dynamic water in the fracture space can be controlled.

[0021] Preferably, both the upper rough fracture plate and the lower rough fracture plate are printed by photosensitive resin, and the transparent cover plate and the transparent bottom plate are connected by an adhesive.

[0022] Preferably, water injection holes are provided on both sides of the transparent cover plate, and the number of water injection holes on each side is not less than a certain number. The water injection pipes are connected to each water injection hole through a four-way pipe.

[0023] Preferably, the data acquisition module includes an image acquisition device, an optical fiber pressure sensor, and an optical fiber temperature sensor; the image acquisition device is a high-speed camera, which is installed on the top of the transparent bottom plate to ensure that the acquisition area of the high-speed camera is located on the top of the grouting hole. The optical fiber pressure sensor and the optical fiber temperature sensor are arranged on the top of the 3D printed lower rough fracture plate.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] Through the flowmeter and flow control valve in the dynamic water control system of the present invention, the influence of different underground water flow velocities and flow directions on the slurry diffusion can be accurately simulated, providing a high-precision experimental platform for the research on fracture grouting in a dynamic water environment;

[0026] Through the combined design of the electric screw lift and the 3D printed rough fracture plate, the flexible adjustment of the fracture width, inclination angle, and roughness is realized, and the rock mass fractures with different geometric shapes can be simulated. Moreover, the test bench is made of transparent materials, combined with a high-resolution image acquisition device, and the diffusion process of the slurry in the fracture can be clearly observed;

[0027] The present invention adopts an optical fiber pressure sensor and an optical fiber temperature sensor, which have higher measurement accuracy and anti-interference ability compared with traditional sensors, and can collect the pressure field and temperature field data during the grouting process in real time and accurately. Description of the Drawings

[0028] Figure 1 It is a schematic diagram of the principle of the grouting test system for the controllable dynamic water environment and fracture geometric structure in Embodiment 1 of the present invention;

[0029] Figure 2 It is a front view of the fracture geometric structure control module in Embodiment 1 of the present invention;

[0030] Figure 3 It is a top view of the fracture geometric structure control module in Embodiment 1 of the present invention;

[0031] Figure 4 Side view of the crack geometry control module in Embodiment 1 of the present invention;

[0032] Figure 5 Flow chart of the test method proposed in Embodiment 2 of the present invention.

[0033] Main symbol description:

[0034] 1 - Air compressor; 2 - Pressure regulating valve a; 3 - Pressure gauge a; 4 - Safety valve; 5 - Silencer; 6 - Fixing screw; 7 - Material pipe joint; 8 - Pressure slurry storage tank; 9 - Pressure regulating valve b; 10 - Pressure gauge b; 11 - Flow control valve a; 12 - Flow meter a; 13 - Flow control valve b; 14 - Flow meter b; 15 - Water tank; 16 - High-speed camera; 17 - Beaker; 18 - Lead screw; 19 - Electric screw lift; 20 - Hinge; 21 - Fixed base; 22 - Grouting hole; 23 - Water injection hole; 24 - Overflow slurry hole; 25 - Transparent cover plate; 26 - Transparent bottom plate; 27 - 3D printed rough crack upper plate; 28 - 3D printed rough crack lower plate; 29 - Micro electric lift; 30 - Slide rail; 31 - Fiber optic sensor; 32 - Flow control valve c; 33 - Flow control valve d. Detailed implementation manners

[0035] Next, in combination with the accompanying drawings and specific implementation manners, the present invention will be further described. It should be noted that, on the premise of no conflict, the following described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0036] Embodiment 1:

[0037] Refer to Figure 1 - Figure 4 , a grouting test system with controllable dynamic water environment and crack geometry proposed in this solution includes a grouting module, a crack geometry control module, a dynamic water control module, and a data acquisition module;

[0038] The grouting module is connected to the crack geometry control module through a grouting pipe;

[0039] The dynamic water control module is connected to the crack geometry control module through a water injection pipe,

[0040] wherein:

[0041] The grouting module is used to achieve stable pressure grouting into the crack geometry control module;

[0042] The crack geometry control module forms a crack structure with adjustable width, inclination angle, and internal roughness;

[0043] The hydrodynamic control module is used to adjust the flow direction and velocity of the dynamic water in the fissures;

[0044] The data acquisition module is used to collect the index information during the test.

[0045] Preferably, the grouting module includes an air compressor 1 and a pressure slurry storage tank 8. The air compressor 1 serves as the pressure source for grouting and can achieve stable-pressure grouting. The air compressor 1 is connected to the pressure slurry storage tank 8 through a grouting pipe; the pressure slurry storage tank 8 contains a pressure regulating valve a2, a pressure gauge a3, a safety valve 4, a silencer 5, fixing screws 6, and a material pipe joint 7.

[0046] Specifically, pour the prepared slurry into the pressure slurry storage tank 8 according to the test requirements, tighten the fixing screws 6, turn on the air compressor 1, and the generated high-pressure gas is injected into the pressure slurry storage tank 8 through the grouting pipe. Control the pressure in the pressure slurry storage tank 8 by adjusting the pressure regulating valve a2; the pressure slurry storage tank 8 is made of stainless steel and is used to store high-pressure gas; the bottom of the pressure slurry storage tank 8 is designed to be conical to prevent the slurry from depositing at the bottom.

[0047] In this solution, the fissure geometric structure control module includes a fissure formation unit, an angle adjustment unit, and a rough fissure plate unit for simulating fissures. Different roughness rough fissure plate units are assembled in the fissure formation unit to simulate different fissure conditions, and the angle adjustment unit is used to adjust the inclination angle of the fissure formation unit.

[0048] As an optional implementation manner of the present invention, the fissure formation unit includes a transparent cover plate 25 and a transparent bottom plate 26, and the rough fissure plate unit includes a rough fissure upper plate 27 and a rough fissure lower plate 28. Among them, the rough fissure upper plate 27 and the rough fissure lower plate 28 are respectively fixed to the transparent cover plate 25 and the transparent bottom plate 26, and the transparent cover plate 25 and the transparent bottom plate 26 are also connected through a width adjustment mechanism to adjust the fissure width;

[0049] And prepare fissure models with different roughnesses according to the test requirements. The 3D printer prints the 3D printed rough fissure upper plate 27 and the 3D printed rough fissure lower plate 28 according to the model file. By installing different 3D printed rough fissure upper plates 27 and 3D printed rough fissure lower plates 28, the control of the fissure roughness can be achieved.

[0050] The transparent cover plate 25 is provided with a grouting hole 22 and a water injection hole 23. The grouting hole 22 is connected to the pressure slurry storage tank 8 through a grouting pipe, and the grouting pipe is equipped with a pressure regulating valve b9 and a pressure gauge b10. The water injection hole 23 is connected to the hydrodynamic control module;

[0051] An overflow slurry hole 24 is provided on the transparent bottom plate 26. The overflow slurry hole 24 is connected to the beaker 17 through a pipeline. The waste liquid flowing out during the test is collected by the beaker 17. A flow control valve c32 and a flow control valve d33 are provided at the bottom of the overflow slurry hole 24.

[0052] In this embodiment, there are four groups of the angle adjustment units, which are respectively hinged at the four corners of the transparent bottom plate 26. The angle adjustment unit includes an electric screw lift 19 and a screw rod 18. Among them, a fixed base 21 is fixedly connected to the bottom of the screw rod 18, and the electric screw lift 19 is installed on the screw rod 18. The electric screw lifts 19 in the four angle adjustment units are respectively hinged to the corners of the transparent bottom plate 26.

[0053] The test system proposed by the present invention further includes two parallel slide rails 30. And the four fixed bases 21 are divided into two groups and are respectively slidably installed on the two slide rails 30.

[0054] During specific operation, the electric screw lift 19 is installed on the screw rod 18. The electric screw lift 19 is fixedly connected to the transparent bottom plate 26 through a hinge 20. The bottom of the screw rod 18 is fixedly connected to the fixed base 21. The fixed base 21 is installed on the slide rail 30. By adjusting the positions of the electric screw lifts 19 and the fixed bases 21 on both sides of the crack, the adjustment of the crack dip angle can be realized. When the dip angle is adjusted to the angle required by the test, press the buckle of the fixed base 21 to fix it on the slide rail 30; a grouting hole 22 and a water injection hole 23 are provided on the transparent cover plate 25. The 3D printed rough crack upper plate 27 is connected to the transparent cover plate 25 through an adhesive; the width adjustment mechanism includes micro electric lifts 29 provided at the four corners of the transparent cover plate 25 and the transparent bottom plate 26. The control of the crack width can be realized by controlling the micro electric lifts 29.

[0055] In this solution, the dynamic water control module includes a water tank 15, a flow meter and a flow control valve. The flow control valve is used to control the flow velocity of the dynamic water in different directions, so as to realize the controllability of the dynamic water environment. The water tank 15 is connected to the water injection hole 23 on the transparent cover plate 25 through a water injection pipe. By controlling different flow control valves, the flow direction and flow velocity of the dynamic water in the crack space can be controlled.

[0056] Preferably, both the rough crack upper plate 27 and the rough crack lower plate 28 are printed by photosensitive resin and are connected to the transparent cover plate 25 and the transparent bottom plate 26 through an adhesive.

[0057] Preferably, water injection holes 23 are provided on both sides of the transparent cover plate 25, and the number of water injection holes 23 on each side is not less than a certain number. The water injection pipes are connected to each water injection hole 23 through four-way pipes.

[0058] Preferably, the data acquisition module includes an image acquisition device, a fiber optic pressure sensor, and a fiber optic temperature sensor; the image acquisition device is a high-speed camera 16, which is installed on top of the transparent bottom plate 26 to ensure that the acquisition area of the high-speed camera 16 is located at the top of the grouting hole 22, and the fiber optic pressure sensor and the fiber optic temperature sensor are arranged on the top of the 3D printed rough fracture lower plate 28.

[0059] It should be noted that the fiber optic sensors 31 are evenly arranged horizontally and vertically in the entire fracture space, and the distance between two sensors is between centimeters and centimeters. The data measured by the fiber optic sensors 31 can obtain pressure and temperature data after being processed by the fiber optic decoder. After the experiment, the data of the high-speed camera 16 and the fiber optic sensors 31 are imported into the computer terminal for processing.

[0060] This embodiment can control the dynamic water environment and study the diffusion law of the grout under different dynamic water flow velocities and different dynamic water flow directions.

[0061] This embodiment can control the geometric structure of the fracture and study the diffusion law of the grout under different fracture widths, inclinations, and roughnesses.

[0062] In this embodiment, a rough fracture plate is obtained by 3D printing, and a transparent photosensitive resin material is used. The transparent cover plate 25 and the transparent bottom plate 26 are made of high-strength acrylic material, and the high-speed camera 16 can be used to record the complete form of the grout diffusion process.

[0063] This embodiment uses fiber optic pressure sensors and fiber optic temperature sensors to be able to collect the pressure field and temperature field data during the grouting process in real time and accurately.

[0064] Embodiment:

[0065] The purpose of this embodiment is to provide a grouting test method with a controllable dynamic water environment and fracture geometric structure. It adopts the above test system. Specifically, when working, the following work needs to be done:

[0066] (1) Control the width and inclination of the fracture by adjusting the electric screw lift gauge and the micro electric lift 29 according to the test requirements, and control the roughness of the fracture by installing the 3D printed rough fracture plate;

[0067] (2) After the fracture geometric structure control system is adjusted, start the dynamic water control module and control the dynamic water flow direction and velocity in the fracture space by adjusting the flow control valve;

[0068] (3) Prepare the required grout in advance according to the test requirements, pour the prepared grout into the pressure grout storage tank 8, and tighten the fixing screw 6 on the top of the pressure grout storage tank 8;

[0069] (4) After the dynamic water flow in the fissure space stabilizes, start the grouting module and grout at a constant pressure into the fissure space;

[0070] (5) Collect data on the diffusion pattern, pressure, and temperature of the grout during the grouting process through a data acquisition system.

[0071] In this embodiment, a grouting test method for a controllable dynamic water environment and fissure geometric structure specifically includes the following steps:

[0072] Step 1: Fabricate the rough fissure upper plate 27 and lower plate by 3D printing according to the test requirements, and paste the rough fissure plates on the transparent cover plate 25 and transparent bottom plate 26 to complete the assembly of the grouting test system for the controllable dynamic water environment and fissure geometric structure.

[0073] Step 2: Paste the fiber optic sensors 31 on the surfaces of the rough fissure upper plate 27 and lower plate, connect them to the computer terminal through data lines, and install a high-speed camera 16 above the grouting hole 22 to record the entire process of grout diffusion in the dynamic water environment.

[0074] Step 3: Fill the water tank 15 with water. If the dynamic water flow is to flow from the left end to the right end of the fissure, open the flow control valves on the left side of the water tank 15 and on the right side at the bottom of the transparent bottom plate 26, and close the flow control valves on the right side of the water tank 15 and on the left side at the bottom of the transparent bottom plate 26 to simulate the actual dynamic water environment.

[0075] Step 4: Prepare the grout used for grouting according to the test requirements, stir it evenly and pour it into the pressure grout storage tank 8, and tighten the fixing screws 6. Start the air compressor 1 and inject high-pressure gas into the pressure grout storage tank 8. After the pressure gauge on the pressure grout storage tank 8 shows stability, open the pressure regulating valve on the grouting pipe, and the grout is injected into the fissure space through the grouting pipe. The grouting pressure can be adjusted by adjusting the pressure regulating valve.

[0076] Step 5: Use the high-speed camera 16 above the grouting hole 22 to record the diffusion process of the grout in the fissure space in real time. After exporting the image data to the computer terminal, perform binary processing and analyze the diffusion pattern of the grout. Collect the pressure and temperature data during the grout diffusion process through the fiber optic sensors 31, process the data using a fiber optic decoder and output it to the computer terminal to analyze the pressure field and temperature field during the grout diffusion process.

[0077] In this embodiment, fiber optic sensors are used to collect data on the pressure field and temperature field during the slurry diffusion process. The fiber optic sensor 31 is divided into a fiber optic pressure sensor and a fiber optic temperature sensor. The fiber optic pressure sensor and the fiber optic temperature sensor are based on the fiber Bragg grating technology. The fiber Bragg grating technology is a periodic refractive index modulation structure formed in the fiber core. Its core principle is that when an external pressure acts on the optical fiber, the strain of the optical fiber will cause the reflection wavelength of the sensor to shift. By detecting the change in wavelength, the pressure value can be deduced. Temperature changes will cause the thermal expansion effect and thermo-optic effect of the optical fiber, resulting in a shift in the reflection wavelength of the fiber Bragg grating. By detecting the change in wavelength, the temperature value can be deduced. The relationship between the reflection wavelength (λ B ) of the fiber Bragg grating and the effective refractive index (n eff ) and grating period (Λ) of the optical fiber is:

[0078] λ B = 2n eff Λ #(1)

[0079] When the external pressure causes strain in the optical fiber, the grating period and the effective refractive index will change, resulting in a shift in the reflection wavelength (Δλ B ). The relationship between the wavelength shift and the pressure (P) and the pressure sensitivity coefficient (K P ) can be expressed as:

[0080] Δλ B = K P ·P #(2)

[0081] The relationship between the reflection wavelength shift (ΔλB) of the fiber Bragg grating and the temperature sensitivity coefficient (K T ) and the temperature (T) is:

[0082] Δλ B = K T ·ΔT #(3)

[0083] By collecting the reflection wavelength shift of the fiber Bragg grating in real time, it can be converted into the pressure and temperature conditions at each position during the grouting process. Combining with the crack model coordinates, a spatial pressure distribution map of the grouting process is constructed to better observe the diffusion pattern of the grouting slurry. Through the comparison of different groups of experiments, the influence of the dynamic water environment and the crack geometric structure on the slurry diffusion is analyzed.

[0084] The above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantive changes and substitutions made by those skilled in the art based on the present invention fall within the scope of protection required by the present invention.

Claims

1. A grouting test system with controllable dynamic water environment and fracture geometry, characterized in that: It includes grouting module, fracture geometry control module, water dynamic control module and data acquisition module; The grouting module is connected to the fracture geometry control module via a grouting pipe; The water dynamic control module is connected to the fracture geometry control module through a water injection pipe. in: The grouting module is used to implement steady-pressure grouting into the fracture geometry control module; The crack geometry control module forms a crack structure with adjustable width, tilt angle and internal roughness; The dynamic water control module is used to adjust the flow direction and flow rate of dynamic water in the crack; The data acquisition module is used to collect index information during the test process.

2. A grouting test system with controllable dynamic water environment and fracture geometry as claimed in claim 1, characterized in that: The grouting module includes an air compressor and a pressure slurry storage tank. The air compressor serves as a pressure source for grouting and can achieve stable pressure grouting. The air compressor and the pressure slurry storage tank are connected by an air injection pipe. The pressure slurry storage tank contains a pressure regulating valve a, a pressure gauge a, a safety valve, a muffler, fixing screws and a pipe joint.

3. A grouting test system with controllable dynamic water environment and fracture geometry as claimed in claim 1, characterized in that: The crack geometry control module includes a crack forming unit for simulating cracks, an angle adjustment unit and a rough crack plate unit. The rough crack plate units with different roughness are assembled in the crack forming unit to simulate different crack conditions. The angle adjustment unit is used to adjust the inclination angle of the crack forming unit.

4. A grouting test system with controllable dynamic water environment and fracture geometry as claimed in claim 1, characterized in that: The crack forming unit includes a transparent cover plate and a transparent bottom plate, and the rough crack plate unit includes a rough crack upper plate and a rough crack lower plate, wherein the rough crack upper plate and the rough crack lower plate are respectively fixed to the transparent cover plate and the transparent bottom plate, and the transparent cover plate and the transparent bottom plate are also connected by a width adjustment mechanism to adjust the crack width; The transparent cover plate is provided with a grouting hole and a water injection hole, the grouting hole and the pressure grout storage tank are connected through a grouting pipe, the grouting pipe is equipped with a pressure regulating valve b and a pressure gauge b, and the water injection hole is connected to a dynamic water control module; The transparent bottom plate is provided with an overflow hole, which is connected to the beaker through a pipeline. The waste liquid flowing out of the test is collected by the beaker. A flow control valve c and a flow control valve d are provided at the bottom of the overflow hole.

5. A grouting test system with controllable dynamic water environment and fracture geometry as claimed in claim 1, characterized in that: The angle adjustment units are provided with four groups, and are respectively hinged at the four corners of the transparent bottom plate. The angle adjustment units include an electric screw elevator and a screw rod, wherein a fixed base is fixedly connected to the bottom of the screw rod, and the electric screw elevator is installed on the screw rod. The electric screw elevators in the four angle adjustment units are respectively hinged to the corners of the transparent bottom plate.

6. A grouting test system with controllable dynamic water environment and fracture geometry as claimed in claim 1, characterized in that: It also includes two parallel slide rails, and the four fixed bases are divided into two groups and are slidably installed on the two slide rails respectively.

7. A grouting test system with controllable dynamic water environment and fracture geometry as claimed in claim 1, characterized in that: The dynamic water control module includes a water tank, a flow meter and a flow control valve. The flow control valve is used to control the dynamic water flow rate in different directions, so as to achieve controllable dynamic water environment. The water tank is connected to the water injection hole on the transparent cover through an injection pipe. By controlling different flow control valves, the flow direction and flow rate of the dynamic water in the crack space can be controlled.

8. A grouting test system with controllable dynamic water environment and fracture geometry as claimed in claim 1, characterized in that: The rough crack upper plate and the rough crack lower plate are both printed with photosensitive resin, and the transparent cover plate and the transparent bottom plate are connected by adhesive.

9. A grouting test system with controllable dynamic water environment and fracture geometry as claimed in claim 1, characterized in that: Water injection holes are arranged on both sides of the transparent cover plate, and there are no less than 3 water injection holes on each side, and the water injection pipe is connected to each water injection hole through a four-way pipe.

10. A grouting test system capable of controlling dynamic water environment and fracture geometry as claimed in claim 1, characterized in that: The data acquisition module includes an image acquisition device, an optical fiber pressure sensor and an optical fiber temperature sensor; the image acquisition device is a high-speed camera, which is mounted on the top of the transparent bottom plate to ensure that the acquisition area of ​​the high-speed camera is located at the top of the grouting hole, and the optical fiber pressure sensor and the optical fiber temperature sensor are arranged on the top of the 3D printed rough crack lower plate.

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