Tunnel lateral grouting reinforcement model test device and method

Abstract

The invention provides a tunnel lateral grouting reinforcement model test device and method. The device comprises a test box, a grouting assembly, a clamping assembly and a lifting assembly. An opening is formed above the test box and is used for simulating a tunnel environment. The grouting assembly comprises a grouting tank for storing grout, a connecting pipe, a grouting pump, a grout conveying pipe and a grouting pipe, the grouting tank is connected with the grouting pump through the connecting pipe, the grouting pump is connected with the first end of the grouting pipe through the grout conveying pipe, the second end of the grouting pipe is a grout outlet and extends into the test box from an opening in the upper portion of the test box, the grouting pump sucks the grout in the grouting tank, and the grouting pipe is connected with the grouting pump. And the slurry is conveyed to the grouting pipe through the slurry conveying pipe. The clamping assembly is fixed to the lifting assembly and clamps the first end of the grouting pipe. The lifting assembly drives the clamping assembly to move up and down, and then the grouting pipe is driven to move up and down. According to the device and the method, pipe drawing grouting and double-liquid grouting parameter research can be realized, and actual working conditions can be simulated more truly.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction testing technology, and in particular to a test device and method for a tunnel lateral grouting reinforcement model. Background Technology

[0002] During subway operation, tunnel steel segments are often affected by a combination of factors, such as the dynamic action of subway vehicles, the development and utilization of underground space around the tunnel, and surface backfilling. This leads to varying degrees of lateral deformation in the existing shield tunnel structure. Especially near the joints of the segment lining structure, the presence of longitudinal and circumferential joints causes uneven changes in the lateral and longitudinal stiffness of the segment lining structure. In severe cases, this can lead to segment cracking, misalignment, and even water leakage and corrosion of the lining structure, seriously affecting the safety and stability of the tunnel.

[0003] Lateral grouting is a commonly used and effective method for addressing the lateral deformation of tunnel steel segments. By injecting grout into the tunnel sidewalls, a horizontal compressive force is applied, causing the tunnel to shrink laterally and return to its original shape, thus controlling the tunnel's convergence deformation. However, the determination of grouting parameters and the response of the strata and tunnel structure during the grouting process cannot be observed in the field. Therefore, to further study the effects and mechanisms of grouting reinforcement, it is necessary to establish a tunnel lateral grouting reinforcement model test device to simulate the tunnel and soil environment. By adjusting the grouting parameters and observing the response of the strata and tunnel structure, the mechanism and effects of grouting reinforcement can be revealed, providing a scientific basis for the design, construction, and maintenance of tunnel engineering. This has significant theoretical and engineering application value.

[0004] Currently, there are existing grouting-lift model test devices for tunnel settlement that can be used as a reference. For example, Chinese invention CN113791068A discloses a continuous grouting-lift model test device for the bottom of a tunnel. This device includes a test chamber system, a grouting system, and a data monitoring and analysis system. The test chamber system includes a model test chamber and a model tunnel. The grouting system includes an air compressor, a grouting tank, a grouting rod, and a grouting bag. The data monitoring and analysis system includes a tunnel displacement monitoring system and an earth pressure monitoring system. This device performs fixed-point grouting at the bottom of the tunnel through the grouting bag. However, in actual engineering grouting, the pipe needs to be pulled out for grouting. This device cannot accurately reproduce the actual process of micro-disturbance grouting. Furthermore, this device can only perform single-liquid grout tests and cannot test the currently superior and more promising two-liquid grouts. Summary of the Invention

[0005] The purpose of this invention is to provide a model test device and method for tunnel lateral grouting reinforcement to solve the above problems. It can realize the study of grouting parameters for pipe pulling and dual-liquid grouting, and can more realistically simulate actual working conditions.

[0006] This invention proposes a test device for a tunnel lateral grouting reinforcement model, comprising a test chamber, a grouting assembly, a clamping assembly, and a lifting assembly;

[0007] The top opening of the test chamber is used to simulate a tunnel environment;

[0008] The grouting assembly includes a grouting tank for storing grout, a connecting pipe, a grouting pump, a grout delivery pipe, and a grouting pipe. The grouting tank is connected to the grouting pump through the connecting pipe. The grouting pump is connected to the first end of the grouting pipe through the grout delivery pipe. The second end of the grouting pipe is a grout outlet that extends into the test chamber from the top opening. The grouting pump draws in the grout from the grouting tank and delivers it to the grouting pipe through the grout delivery pipe.

[0009] The clamping assembly is fixed to the lifting assembly and clamps the first end of the grouting pipe;

[0010] The lifting component drives the clamping component to move up and down, which in turn drives the grouting pipe to move up and down.

[0011] In one embodiment, the lifting component includes a motor, a horizontal slide rail, a base, a vertical slide rail, and a slider;

[0012] The horizontal slide rail is fixedly installed above the test chamber;

[0013] The base is fixedly installed at the bottom of the vertical slide rail and slidably installed on the horizontal slide rail;

[0014] The vertical slide rail is slidably connected to the horizontal slide rail via the base;

[0015] The slider is slidably connected to the vertical slide rail;

[0016] The motor is connected to the base and the slider respectively, controlling the base to drive the vertical slide rail to move left and right along the horizontal slide rail, and controlling the slider to move up and down along the vertical slide rail.

[0017] In one embodiment, the test chamber is a hexahedron, and mounting plates are fixedly provided on the four sides of the upper edge of the test chamber;

[0018] There are two horizontal slide rails, which are fixed on two opposite mounting plates, and the two ends of the base are respectively placed on the two horizontal slide rails.

[0019] In one embodiment, the clamping component includes a clamping rod and a clamping head;

[0020] One end of the clamping rod is fixedly connected to the slider, and the other end is fixedly connected to the clamping head;

[0021] The clamping head clamps the outer wall of the grouting pipe.

[0022] In one embodiment, the grouting assembly further includes a weighing scale, a valve, and a pressure gauge;

[0023] The weighing gauge is located below the grouting tank and is used to calculate the grouting volume;

[0024] The valve is installed on the grout delivery pipe and is used to control the injection and stop of the grout.

[0025] The pressure gauge is installed on the grout delivery pipe and located between the valve and the grouting pipe, and is used to measure the grouting pressure value.

[0026] In one embodiment, the grouting tank includes a first grouting tank for storing a first grout and a second grouting tank for storing a second grout, the connecting pipe includes a first connecting pipe and a second connecting pipe, and the grout delivery pipe includes a first grout delivery pipe and a second grout delivery pipe;

[0027] The grouting assembly also includes a mixer connected between the grout delivery pipe and the grouting pipe for mixing the first grout and the second grout.

[0028] The first grouting tank is connected to the grouting pump through the first connecting pipe, and then connected to the mixer through the first grout delivery pipe. The second grouting tank is connected to the grouting pump through the second connecting pipe, and then connected to the mixer through the second grout delivery pipe. The first grout and the second grout are mixed by the mixer and then fed into the grouting pipe together.

[0029] A weighing scale is installed below the first grouting tank and the second grouting tank, and a valve and a pressure gauge are respectively installed on the first grouting pipe and the second grouting pipe.

[0030] In one embodiment, the grouting pump is a dual-cylinder dual-liquid grouting pump with two independent cylinders.

[0031] In one embodiment, the test chamber is made of five transparent glass plates bonded together.

[0032] This invention also proposes a test method for a tunnel lateral grouting reinforcement model, which is applied to the tunnel lateral grouting reinforcement model test device described above, and includes the following steps:

[0033] Simulated soil was layered and loaded into the test chamber based on simulated working conditions.

[0034] During the process of loading simulated soil, the tunnel model was buried according to the experimental design;

[0035] Sensors were embedded on both sides of the tunnel model and connected to a computer to collect monitoring data in real time.

[0036] Operate the motor to adjust the position of the base and slider so that the grout outlet of the grouting pipe is located at a predetermined position on the side of the tunnel model;

[0037] Adjust the grouting pump and valves to ensure that the grouting parameters meet the experimental design requirements;

[0038] After the grouting is completed and the grout has solidified, the simulated soil is excavated to measure the size of the grout veins.

[0039] The strength of the grout consolidation body was tested, and the collected sensor data was processed to analyze the stress and deformation of the tunnel model and the model soil.

[0040] In one embodiment, the sensor includes an earth pressure cell and a pore pressure gauge. The earth pressure cell is used to measure the soil pressure outside the tunnel model, and the pore pressure gauge is used to measure the pore water pressure inside the soil outside the tunnel model.

[0041] Compared with the prior art, the beneficial effects of the tunnel lateral grouting reinforcement model test device and method of the present invention are as follows:

[0042] 1) This invention can realize pipe pulling grouting, which can more realistically simulate the pipe pulling operation of lateral grouting on the actual site, and is more consistent with the engineering site.

[0043] 2) This invention can be used to study the effects of single-liquid grouting parameters on tunnel reinforcement, as well as to study dual-liquid grouting parameters.

[0044] 3) Using the experimental device of this invention to study the micro-disturbance grouting mechanism plays an important role in improving on-site construction efficiency, reducing trial and error costs, and optimizing grouting parameters such as grouting pressure and grouting volume. It can provide good consultation and suggestions for actual engineering operations and provide certain reference value for the verification of relevant theoretical research and the formulation of relevant standards. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of a tunnel lateral grouting reinforcement model test device according to an embodiment of the present invention;

[0046] Figure 2 This is a schematic diagram of the grouting component in a tunnel lateral grouting reinforcement model test device according to an embodiment of the present invention.

[0047] Figure Labels

[0048] 1. Test chamber; 2. Grouting tank; 21. First grouting tank; 22. Second grouting tank; 3. Connecting pipe; 31. First connecting pipe; 32. Second connecting pipe; 4. Grouting pump; 5. Grout delivery pipe; 51. First grout delivery pipe; 52. Second grout delivery pipe; 6. Grouting pipe; 7. Mounting plate; 8. Mixer; 11. Motor; 12. Horizontal slide rail; 13. Base; 14. Vertical slide rail; 15. Slider; 16. Clamping rod; 17. Clamping head. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this invention more readily understood, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that while many specific details are set forth in the following description to provide a thorough understanding of the invention, the invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the invention; therefore, the invention is not limited to the specific embodiments disclosed below.

[0050] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0051] Secondly, the phrase "an embodiment" or "an embodiment" in this application refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the invention. The phrases "in one embodiment" and "an embodiment" appearing in different places in this specification do not all refer to the same embodiment, nor are they embodiments that are mutually exclusive, either alone or selectively, with other embodiments. The terms "comprising" or "including" indicate the presence of the claimed feature but do not exclude the presence of one or more other features. The term "and / or" as used in this application includes any and all combinations of one or more of the related listed items.

[0052] This invention proposes a test device for a tunnel lateral grouting reinforcement model, comprising a test chamber 1, a grouting assembly, a clamping assembly, and a lifting assembly. (See attached diagram.) Figure 1The test chamber 1 has an opening at the top for holding simulated soil, tunnel models, etc., to simulate the tunnel environment. The grouting assembly includes a grout tank 2 for storing grout, a connecting pipe 3, a grout pump 4, a grout delivery pipe 5, and a grouting pipe 6. The grout tank 2 is connected to the grout pump 3 via the connecting pipe 3. The grout pump 3 is connected to the first end of the grouting pipe 6 via the grout delivery pipe 5. The second end of the grouting pipe 6 is the grout outlet, extending into the test chamber 1 from the top opening. The grout pump 3 draws in the grout from the grout tank 2 and delivers it to the grouting pipe 6 via the grout delivery pipe 5. A clamping assembly is fixed to the lifting assembly and clamps the first end of the grouting pipe 6. The lifting assembly drives the clamping assembly to move up and down, thereby moving the grouting pipe 6 up and down to achieve pipe-pulling grouting, more realistically simulating the pipe-pulling operation of lateral grouting in actual field conditions.

[0053] One embodiment of the lifting component of the present invention includes a motor 11, a horizontal slide rail 12, a base 13, a vertical slide rail 14, and a slider 15. The horizontal slide rail 12 is fixedly disposed above the test chamber 1. The base 13 is fixedly disposed at the bottom of the vertical slide rail 14 and slidably disposed on the horizontal slide rail 12. The vertical slide rail 14 is slidably connected to the horizontal slide rail 12 via the base 13. The slider 15 is slidably connected to the vertical slide rail 14. The motor 11 is connected to both the base 13 and the slider 15, controlling the base 13 to move the vertical slide rail 14 left and right along the horizontal slide rail 12, and controlling the slider 15 to move up and down along the vertical slide rail 14. In this embodiment, the motor 11 is preferably a stepper motor.

[0054] In one embodiment of the present invention, the test chamber 1 is a hexahedron, and mounting plates 7 are fixedly installed on the four sides of the upper edge of the test chamber 1. There are two horizontal slide rails 12, which are fixed on the two opposite mounting plates 7 respectively, and the two ends of the base 13 are respectively placed on the two horizontal slide rails 12.

[0055] One embodiment of the clamping component of the present invention includes a clamping rod 16 and a clamping head 17. One end of the clamping rod 16 is fixedly connected to a slider 15, and the other end is fixedly connected to the clamping head 17. The clamping head 17 is sleeved and clamped on the outer wall of the grouting pipe 6 to clamp and fix the grouting pipe 6.

[0056] One embodiment of the grouting assembly of the present invention further includes a weighing meter, a valve, and a pressure gauge (not shown in the figure). The weighing meter is located below the grouting tank 2 and is used to calculate the grouting volume. The valve is located on the grout delivery pipe 5 and is used to control the injection and stopping of the grout. The pressure gauge is located on the grout delivery pipe 5 and between the valve and the grouting pipe 6, and is used to measure the grouting pressure value.

[0057] In one embodiment of the present invention, the grouting tank 2 includes a first grouting tank 21 for storing a first grout and a second grouting tank 22 for storing a second grout. The connecting pipe 3 includes a first connecting pipe 31 and a second connecting pipe 32. The grout delivery pipe 5 includes a first grout delivery pipe 51 and a second grout delivery pipe 52. See also... Figure 2The grouting assembly also includes a mixer 8, connected between the grout delivery pipe 5 and the grouting pipe 6, for mixing the first grout and the second grout. The first grouting tank 21 is connected to the grouting pump 4 via a first connecting pipe 31, and then to the mixer 8 via a first grout delivery pipe 51. The second grouting tank 22 is connected to the grouting pump 4 via a second connecting pipe 32, and then to the mixer 8 via a second grout delivery pipe 52. The first and second grouts are mixed by the mixer 8 and then fed into the grouting pipe 6. A weighing gauge is installed below each of the first and second grouting tanks 21 and 22, and a valve and a pressure gauge are respectively installed on the first and second grout delivery pipes 51 and 52. This design is for studying the grouting parameters of a two-component grout. Single-component grout, i.e., cement grout, has excellent fluidity, but may take several hours to solidify after being injected behind the pipe segment, resulting in disadvantages such as long setting time, low strength, and poor filling effect. Therefore, the two-component grout, cement grout + water glass, with its advantages of rapid setting, early strength, and impermeability, is gradually becoming the trend, making a research device for two-component grouts essential.

[0058] One embodiment of the grouting pump of the present invention is a double-cylinder, double-liquid grouting pump, which has two independent cylinders and can simultaneously inject two different grouting materials. The two grouts are drawn into the grouting tank by pressure, and then pressurized and delivered by the reciprocating motion of a piston or screw mechanism.

[0059] The test chamber 1 of one embodiment of the present invention is made of five transparent glass plates bonded together.

[0060] This invention also proposes a test method for a tunnel lateral grouting reinforcement model, which is applied to the tunnel lateral grouting reinforcement model test device described above, and includes the following steps:

[0061] Simulated soil was layered and loaded into test chamber 1 based on simulated working conditions;

[0062] During the process of loading simulated soil, the tunnel model was buried according to the experimental design;

[0063] Sensors were embedded on both sides of the tunnel model and connected to a computer to collect monitoring data in real time.

[0064] The motor 11 is operated to adjust the position of the base 13 and the slider 15 so that the grout outlet of the grouting pipe 6 is located at a predetermined position on the side of the tunnel model.

[0065] Adjust the grouting pump 4 and valves to ensure that the grouting parameters meet the experimental design requirements;

[0066] During the grouting process, the speed of pipe pulling can be controlled by a motor, so that the grouting pipe 6 is gradually pulled out during the grouting process, thereby controlling the height of the grouting body until the grouting is completed and the grouting pipe is pulled out.

[0067] After the grouting is completed and the grout has solidified, the simulated soil is excavated to measure the size of the grout veins.

[0068] The strength of the grout consolidation body was tested, and the collected sensor data was processed to analyze the stress and deformation of the tunnel model and the model soil.

[0069] The materials and proportions of the simulated soil can be configured according to actual working conditions. Due to the reduced grouting range, the concentration of the experimental grouting material can also differ from that of the actual grouting material. The experimental grouting material should be appropriately diluted to control the initial setting time of the grout within a reasonable time, such as about one minute. The experimental design refers to the burial depth of the tunnel model, the surrounding earth pressure, and the grouting parameters.

[0070] The sensor in one embodiment of the present invention includes an earth pressure cell and a pore pressure gauge. The earth pressure cell is used to measure the soil pressure outside the tunnel model, and the pore pressure gauge is used to measure the pore water pressure inside the soil outside the tunnel model.

[0071] It should be noted that the terms "upper", "lower", "inner", "outer", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. Such expressions are only for the purpose of making the description of the present invention simpler and more convenient, and do not indicate or imply that the component referred to must have a specific orientation or be constructed and operated in a specific orientation.

[0072] Furthermore, in this application, unless otherwise expressly specified and limited, terms such as "connection" and "setup" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0073] The present invention has the following beneficial effects:

[0074] 1) This invention can realize pipe pulling grouting, which can more realistically simulate the pipe pulling operation of lateral grouting on the actual site, and is more consistent with the engineering site.

[0075] 2) This invention can be used to study the effects of single-liquid grouting parameters on tunnel reinforcement, as well as to study dual-liquid grouting parameters.

[0076] 3) Using the experimental device of this invention to study the micro-disturbance grouting mechanism plays an important role in improving on-site construction efficiency, reducing trial and error costs, and optimizing grouting parameters such as grouting pressure and grouting volume. It can provide good consultation and suggestions for actual engineering operations and provide certain reference value for the verification of relevant theoretical research and the formulation of relevant standards.

[0077] Although the methods described above are illustrated and depicted as a series of actions for the sake of simplicity, it should be understood and appreciated that these methods are not limited by the order of the actions, as some actions may occur in a different order and / or concurrently with other actions from the illustrations and descriptions herein or not illustrated and described herein but which may be understood by those skilled in the art, according to one or more embodiments.

[0078] The constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in size, structure, shape, and proportions, as well as parameter values, installation arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the elements may be inverted or otherwise changed, and the nature or number or position of discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Various corresponding modifications and variations can be made by those skilled in the art according to this invention without departing from the spirit and essence of the invention, but such corresponding modifications and variations should fall within the protection scope of this invention.

Claims

1. A test device for lateral grouting reinforcement of tunnels, characterized in that, Includes test chamber, grouting assembly, clamping assembly and lifting assembly; The top opening of the test chamber is used to simulate a tunnel environment; The grouting assembly includes a grouting tank for storing grout, a connecting pipe, a grouting pump, a grout delivery pipe, and a grouting pipe. The grouting tank is connected to the grouting pump through the connecting pipe. The grouting pump is connected to the first end of the grouting pipe through the grout delivery pipe. The second end of the grouting pipe is a grout outlet that extends into the test chamber from the top opening. The grouting pump draws in the grout from the grouting tank and delivers it to the grouting pipe through the grout delivery pipe. The clamping assembly is fixed to the lifting assembly and clamps the first end of the grouting pipe; The lifting component drives the clamping component to move up and down, which in turn drives the grouting pipe to move up and down.

2. The tunnel lateral grouting reinforcement model test device according to claim 1, characterized in that, The lifting component includes a motor, a horizontal slide rail, a base, a vertical slide rail, and a slider; The horizontal slide rail is fixedly installed above the test chamber; The base is fixedly installed at the bottom of the vertical slide rail and slidably installed on the horizontal slide rail; The vertical slide rail is slidably connected to the horizontal slide rail via the base; The slider is slidably connected to the vertical slide rail; The motor is connected to the base and the slider respectively, controlling the base to drive the vertical slide rail to move left and right along the horizontal slide rail, and controlling the slider to move up and down along the vertical slide rail.

3. The tunnel lateral grouting reinforcement model test device according to claim 2, characterized in that, The test chamber is a hexahedron, and mounting plates are fixedly installed on the four sides of the upper edge of the test chamber. There are two horizontal slide rails, which are fixed on two opposite mounting plates, and the two ends of the base are respectively placed on the two horizontal slide rails.

4. The tunnel lateral grouting reinforcement model test device according to claim 2, characterized in that, The clamping component includes a clamping rod and a clamping head; One end of the clamping rod is fixedly connected to the slider, and the other end is fixedly connected to the clamping head; The clamping head clamps the outer wall of the grouting pipe.

5. The tunnel lateral grouting reinforcement model test device according to claim 1, characterized in that, The grouting assembly also includes a weighing gauge, valves, and a pressure gauge; The weighing gauge is located below the grouting tank and is used to calculate the grouting volume; The valve is installed on the grout delivery pipe and is used to control the injection and stop of the grout. The pressure gauge is installed on the grout delivery pipe and located between the valve and the grouting pipe, and is used to measure the grouting pressure value.

6. The tunnel lateral grouting reinforcement model test device according to claim 5, characterized in that, The grouting tank includes a first grouting tank for storing a first grout and a second grouting tank for storing a second grout; the connecting pipe includes a first connecting pipe and a second connecting pipe; and the grout delivery pipe includes a first grout delivery pipe and a second grout delivery pipe. The grouting assembly also includes a mixer connected between the grout delivery pipe and the grouting pipe for mixing the first grout and the second grout. The first grouting tank is connected to the grouting pump through the first connecting pipe, and then connected to the mixer through the first grout delivery pipe. The second grouting tank is connected to the grouting pump through the second connecting pipe, and then connected to the mixer through the second grout delivery pipe. The first grout and the second grout are mixed by the mixer and then fed into the grouting pipe together. A weighing scale is installed below the first grouting tank and the second grouting tank, and a valve and a pressure gauge are respectively installed on the first grouting pipe and the second grouting pipe.

7. The tunnel lateral grouting reinforcement model test device according to claim 6, characterized in that, The grouting pump is a dual-cylinder, dual-liquid grouting pump with two independent cylinders.

8. The tunnel lateral grouting reinforcement model test device according to claim 1, characterized in that, The test chamber is made of five transparent glass plates bonded together.

9. A test method for a tunnel lateral grouting reinforcement model, characterized in that, The method, applied to the tunnel lateral grouting reinforcement model test device as described in any one of claims 1-8, includes the following steps: Simulated soil was layered and loaded into the test chamber based on simulated working conditions. During the process of loading simulated soil, the tunnel model was buried according to the experimental design; Sensors were embedded on both sides of the tunnel model and connected to a computer to collect monitoring data in real time. Operate the motor to adjust the position of the base and slider so that the grout outlet of the grouting pipe is located at a predetermined position on the side of the tunnel model; Adjust the grouting pump and valves to ensure that the grouting parameters meet the experimental design requirements; After the grouting is completed and the grout has solidified, the simulated soil is excavated to measure the size of the grout veins. The strength of the grout consolidation body was tested, and the collected sensor data was processed to analyze the stress and deformation of the tunnel model and the model soil.

10. The tunnel lateral grouting reinforcement model test method according to claim 9, characterized in that, The sensor includes an earth pressure cell and a pore pressure gauge. The earth pressure cell is used to measure the soil pressure outside the tunnel model, and the pore pressure gauge is used to measure the pore water pressure inside the soil outside the tunnel model.

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