Horizontal rotary jet grouting test device and use method thereof

Abstract

The invention discloses a horizontal rotary jet grouting test device and a use method thereof.The device comprises a loading system used for manufacturing simulated rock soil, a rotary jet grouting system used for conducting grouting operation on the simulated rock soil, a grouting system, an air compressor and a control system used for controlling grouting parameters; the rotary spraying system comprises a grouting rod and an orientation assembly, the end of the grouting rod is arranged on a rotary connector, the rotary connector is arranged in the orientation assembly and used for controlling axial rotation of the grouting rod, and the grouting rod is further communicated with the grouting system and an air compressor. The grouting system comprises a storage box used for containing a material A and a material B, a sand injection assembly and a grouting machine connected with the storage box, the grouting machine is further connected with an air compressor, and the control system is used for regulating and controlling the rotary spraying system, the grouting system and the air compressor. The invention aims to simulate the actual rotary jet grouting working condition of the tunnel.

Description

Technical Field

[0001] The invention relates to the technical field of grouting experiments, and in particular to a horizontal rotary jet grouting test device and a use method thereof. Background Art

[0002] At present, tunnel construction often encounters water-rich soft strata, which are very likely to induce major geological disasters such as unstable collapse, water gushing and mud bursting, and large deformation. If emergency rescue is not timely, it is easy to cause immeasurable economic losses, casualties and indefinite shutdown. The existing high-pressure rotary jet grouting technology is to use a rotating nozzle to spray high-speed fluid while cutting the soft surrounding rock and mixing the slurry with the shredded rock and soil. After chemical reaction, a solid reinforced pile body (rotary jet pile) is formed, and the strength can reach more than several megapascals. The rotary jet pile can form a uniform and closed pre-support shell structure, which has reinforcement and water-stopping functions, can inhibit the development of the plastic zone of the face, greatly improve the self-stabilization ability of the surrounding rock, and effectively control the deformation of the surrounding rock. Therefore, rotary jet grouting reinforcement of water-rich soft surrounding rock during tunnel construction is the fundamental method to solve this type of major geological disasters. The main technical parameters of rotary jet grouting are injection pressure, flow rate, rotation speed, lifting speed, etc. The selection of parameters is directly related to the water blocking and reinforcement effect of the soft strata. Once the selection is unreasonable, it may lead to waste of resources and even cause engineering accidents. However, the current selection of rotary jet grouting technical parameters is mainly based on engineering analogy, lacking scientific test equipment and test data support, which is very blind, and the slurry diffusion law and the actual grouting effect are unclear, making it difficult to formulate accurate and reasonable rotary jet grouting processes and measures. Therefore, it is necessary to have an indoor test device that simulates high-pressure horizontal rotary jet construction technology to cut soft rock and soil media. The current existing technology is still blank in this field.

[0003] The utility model with the existing publication number CN202393664U discloses an indoor test device for simulating the soil cutting ability of high-pressure rotary jet technology, which includes: a main structure for holding the test soil; a rotary jet rod for connecting and fixing the rotary jet power equipment and inputting and ejecting the high-pressure water required for the test; a mobile casing system for fixing the rotary power equipment; a rotary power system for providing power for the rotary jet rod to obtain a rotation speed; a lifting power system for providing power for the rotary jet rod to obtain a lifting speed; a water supply system for displaying water pressure and flow and connected to the rotary jet rod; a pressure monitoring system for connecting to a pore water pressure sensor to monitor and record force data in real time. The test device has a small range of construction parameters for injection pressure, injection flow, rotation speed and lifting speed, lacks an intelligent control system, and has low adaptability; it cannot consider the influence of ground stress, cannot replace the rotary jet rod, and cannot achieve horizontal rotary jet grouting; cement slurry is used, and the designed grouting pipeline is not suitable for polyurethane double slurry. Summary of the invention

[0004] The main purpose of the present invention is to provide a horizontal rotary jet grouting test device and a method of using the same, aiming to solve the technical problem that the existing test device is difficult to simulate the actual rotary jet grouting working conditions of the tunnel.

[0005] To achieve the above-mentioned object, the present invention provides a horizontal rotary jet grouting test device, the device comprising a loading system for making simulated rock and soil, a rotary jet system for performing grouting operations on the simulated rock and soil, a grouting system, an air compressor and a control system for controlling grouting parameters;

[0006] The rotary grouting system includes a grouting rod and an orientation assembly for adjusting the spatial position of the grouting rod. The end of the grouting rod is arranged on a rotary joint, and the rotary joint is arranged in the orientation assembly. The rotary joint is used to control the axial rotation of the grouting rod. The grouting rod is also connected to the grouting system and the air compressor respectively.

[0007] The grouting system includes a storage box for placing material A and material B, a sand injection assembly, and a grouting machine connected to the storage box. The grouting machine is also connected to an air compressor. The storage box is used to provide material A and material B to the grouting rod. The sand injection assembly is used to provide fine sand to the grouting rod. In actual application, the fine sand is pre-combined with material A or material B to form a mixed slurry.

[0008] The control system is used to regulate the rotary jet system, the grouting system and the air compressor.

[0009] Optionally, the orientation assembly includes a movable bracket for adjusting the left and right position of the grouting rod, an up and down movable unit for adjusting the up and down position of the grouting rod, and a forward and backward unit for adjusting the front and rear position of the grouting rod, and an angle adjustment bracket, an up and down movable unit, and a forward and backward unit are arranged above the movable bracket.

[0010] Optionally, a plurality of groups of pulleys are arranged at the bottom of the movable bracket, and each group of pulleys is used to control the movable bracket to slide back and forth on a corresponding parallel track.

[0011] Optionally, the up-and-down moving unit and the forward-and-backward moving unit are arranged on the angle adjustment bracket, and the forward-and-backward moving unit is used to adjust the overall operation of the up-and-down moving unit;

[0012] The rotary joint is also connected to the rotary motor, and the rotary joint and the rotary motor are both arranged in the up-and-down moving unit;

[0013] The angle adjustment bracket is used to adjust the up and down moving unit to adjust the elevation angle of the grouting rod.

[0014] Optionally, the storage box is connected to the grouting rod through the first grouting pipe and the second grouting pipe respectively, the sand injection assembly is connected to the grouting rod through the sand injection pipe, the first grouting pipe and the sand injection pipe are connected in parallel to form a junction pipe, and the junction pipe and the second grouting pipe extend into the grouting rod.

[0015] Optionally, the grouting rod includes a drill bit at the end and a grouting nozzle connected to the drill bit, the grouting nozzle includes a accommodating chamber and a junction pipe disposed inside the accommodating chamber, and a second grouting pipe, and the accommodating chamber is also connected to the air pipe of the air compressor.

[0016] Optionally, the loading system includes a reaction frame, a hydraulic cylinder with a top connected to the reaction frame, a model box and a push assembly;

[0017] A loading plate is connected below the hydraulic cylinder, and the loading plate is used to compact the simulated rock and soil in the model box;

[0018] The model box is arranged on the pushing assembly, and a detachable panel is arranged on one side of the model box close to the grouting rod;

[0019] The hydraulic cylinder is connected to the hydraulic station through a hydraulic pipe.

[0020] Optionally, the hydraulic station is also connected to a sand injection assembly.

[0021] Optionally, the detachable panel is provided with reserved holes, which are used for positioning the grouting rod for insertion or drilling; the control system includes a PLC control system.

[0022] In addition, in order to achieve the above-mentioned purpose, the present invention also provides a method for using the above-mentioned horizontal rotary jet grouting test device, and the method comprises the following steps:

[0023] Step 1, using a loading system to perform filling-compacting operations in a model box to produce simulated rock and soil with a preset rock and soil density;

[0024] Step 2, adjusting the position and elevation angle of the rotary jet grouting rod by moving the bracket, the up-and-down moving unit, and the angle adjustment bracket, and drilling the rotary jet grouting rod into the simulated rock and soil to a preset depth by the horizontal forward and backward device and the rotating motor;

[0025] Step 3, connecting the first grouting pipe, the second grouting pipe, the sand injection pipe, and the confluence pipe between the material storage box, the sand injection assembly and the grouting rod, and starting the rotary jet system, the grouting system, the air compressor, and controlling the grouting parameters through the control system to perform backward rotary jet grouting, wherein the material storage box provides polyurethane material A and material B to the grouting rod through the first grouting pipe and the second grouting pipe, and the confluence pipe is formed by connecting the first grouting pipe and the sand injection pipe in parallel and extends into the grouting rod;

[0026] Step 4, when the lifting distance of the grouting rod is 4 / 5 of the initial drilling depth, the rotary jet grouting system, the grouting system, and the air compressor are turned off to stop the rotary jet grouting;

[0027] Step 5. After the grouting is completed, inject cleaning fluid into all pipelines through an air compressor to clean the grouting pipelines.

[0028] Beneficial effects:

[0029] The horizontal rotary jet grouting test device of the present invention prepares simulated rock and soil by setting up a loading system, and performs grouting operations on the simulated rock and soil through a rotary jet system, a grouting system, and an air compressor, wherein the movement of the grouting rod in the front, back, left, right, top, and bottom positions and the adjustment of the elevation angle of the grouting rod are controlled by an azimuth component, thereby realizing effective adjustment of the spatial position and angle of the grouting rod, and the grouting rod is connected to a rotary joint, and the grouting rod is rotated axially to adapt to rotary grouting tests under different conditions. At the same time, the grouting system can provide the slurry required for grouting, which includes polyurethane slurry and some fine sand. In actual applications, the fine sand is pre-combined with material A or material B into a mixed slurry, and the grouting rod is also connected to the compressor, so that the gas, slurry and sand can be mixed in the grouting nozzle to achieve the synergistic effect of the three to enhance the grouting injection effect, and the grouting parameters are controlled by the control system to achieve effective simulation of the grouting test, and finally the injection pressure, injection flow, rotation speed, rotation mode, lifting speed, lifting mode, ground stress loading and other parameters can be intelligently controlled to adapt to the rotary jet grouting test device for simulating rock and soil with different densities, and polyurethane double slurry is used to realize the near-full-scale horizontal rotary jet grouting simulation of tunnels under multiple working conditions, and finally achieve the purpose of obtaining the best grouting parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0031] Figure 1 It is a front view of an embodiment of a horizontal rotary jet grouting test device of the present invention;

[0032] Figure 2 for Figure 1 a top view of the structure shown;

[0033] Figure 3 for Figure 1 a side view of the structure shown;

[0034] Figure 4 for Figure 3 Schematic diagram after adjusting the elevation angle of the grouting rod;

[0035] Figure 5 for Figure 3 Magnified view of the nozzle in FIG.

[0036] Figure 6 for Figure 4 Schematic diagram of the removable panel in.

[0037] Description of Figure Numbers:

[0038] 11. forward and backward unit, 12. rotating joint, 13. grouting rod, 14. moving bracket, 15. angle adjustment bracket, 16. up and down moving unit, 1201. rotating motor, 1301. accommodating chamber;

[0039] 21. material storage box, 22. grouting machine, 23. confluence pipe, 24. sand injection assembly, 2101. first grouting pipe, 2102. second grouting pipe, 2401. sand injection pipe;

[0040] 31. Hydraulic cylinder, 32. Reaction frame, 33. Model box, 34. Push assembly, 35. Loading plate, 36. Hydraulic pipe, 37. Hydraulic station, 331. Removable panel, 332. Reserved holes;

[0041] 4. Control system;

[0042] 5. Air compressor.

[0043] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] It should be noted that all directional indications (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, in the present invention, the descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0047] Furthermore, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0048] See also Figures 1 to 6 The present invention provides a schematic diagram of a structure of an embodiment of a horizontal rotary jet grouting test device, wherein the device includes a loading system for making simulated rock and soil, a rotary jet system for grouting the simulated rock and soil, a grouting system, an air compressor 5, and a control system 4 for controlling grouting parameters. Specifically, the loading system includes a reaction frame 32, a hydraulic cylinder 31 connected to the reaction frame 32 at the top, and a model box 33. A loading plate 35 is connected below the hydraulic cylinder 31. In the actual test, the rock and soil are filled into the model box 33 in batches, and the loading plate 35 is used for layered compaction. Preferably, the model box 33 is arranged on a movable push assembly 34, so as to facilitate the completion of the filling-compacting operation, and the hydraulic cylinder 31 is connected to the hydraulic station 37 through a hydraulic pipe 36, so as to realize the production of simulated rock and soil with a preset rock and soil density in the model box 33. In addition, during the filling process, sensors are buried according to the test requirements to facilitate corresponding monitoring. And the rock and soil filled in the model box 33 can simulate rock and soil with different rock and soil densities according to the test requirements. And the loading pressure of the loading system is preferably 1 MPa.

[0049] Furthermore, if Figure 1-4 As shown, the rotary grouting system includes a grouting rod 13 and an orientation component for adjusting the spatial position of the grouting rod 13, that is, the movement of the grouting rod 13 in the front, back, left, right, top and bottom positions and the adjustment of the elevation angle of the grouting rod 13 are controlled by the orientation component, thereby realizing the effective adjustment of the spatial position of the grouting rod 13 to adapt to the grouting needs under different conditions.

[0050] Furthermore, the end of the grouting rod 13 is arranged on the rotating joint 12, and the rotating joint 12 is arranged in the orientation assembly, and the grouting rod 13 is adjusted by adjusting the rotating joint 12 through the orientation assembly. And the rotating joint 12 is also connected to the rotating motor 1201, and the rotating motor 1201 can control the grouting rod 13 to rotate along the central axis of the grouting rod 13. Preferably, the rotation speed of the grouting rod 13 is 0 to 50 rpm, and is infinitely adjustable, with an accuracy of not less than 1 rpm.

[0051] Furthermore, the grouting rod 13 is also connected to the grouting system and the air compressor 5 respectively, wherein the grouting system is used to provide the slurry required for grouting, the slurry includes polyurethane slurry and part of fine sand, and the air compressor 5 is used to provide a certain injection pressure for the grouting of the grouting rod 13. Specifically, the grouting system includes a storage box 21 for placing material A and material B, a sand injection assembly 24, and a grouting machine 22 connected to the storage box 21. The storage box 21 provides material A and material B to the grouting rod 13 through the first grouting pipe 2101 and the second grouting pipe 2102, and the sand injection assembly 24 provides fine sand to the grouting rod 13 through the sand injection pipe 2401. In actual application, the fine sand is pre-merged with material A or material B into a mixed slurry, that is, the first grouting pipe 2101 and the sand injection pipe 2401 are connected in parallel to form a merging pipe 23, and then the merging pipe 23 and the second grouting pipe 2102 extend into the inner cavity of the grouting rod 13. Preferably, the inner cavity of the grouting rod 13 is also connected to the air pipe of the air compressor 5, and the injection pressure of the grouting rod 13 is adjusted by the high-pressure gas transmitted by the air compressor 5 to enhance the grouting injection effect. More preferably, the hydraulic station 37 is also connected to the sand injection component 24, and the hydraulic station 37 provides power for the sand injection component 24 to transmit fine sand. And the flow control of the first grouting pipe 2101, the second grouting pipe 2102, and the sand injection pipe 2401 are respectively 0-40L / min.

[0052] Furthermore, the grouting machine 22 is also connected to the air compressor 5 to provide power for the transmission of material A and material B through the grouting machine 22. Preferably, the grouting pressure that can be adjusted by the grouting machine 22 is 0 to 20 MPa.

[0053] Furthermore, the orientation assembly includes a mobile bracket 14 for adjusting the left and right position of the grouting rod 13, an up and down moving unit 16 for adjusting the up and down position of the grouting rod 13, and a forward and backward unit 11 for adjusting the front and rear position of the grouting rod 13. An angle adjustment bracket 15, an up and down moving unit 16, and a forward and backward unit 11 are arranged above the mobile bracket 14. Preferably, a plurality of groups of pulleys are arranged at the bottom of the mobile bracket 14, and each group of pulleys is used to control the mobile bracket 14 to slide back and forth on the corresponding parallel track to adjust the left and right position of the grouting rod 13. Preferably, the lifting speed in the up and down moving unit 16 is 0 to 50 cm / min, and is infinitely adjustable with an accuracy of not less than 1 cm / min.

[0054] Further, the up-down moving unit 16 and the forward-backward unit 11 are arranged on the angle adjustment bracket 15, and the forward-backward unit 11 is used to adjust the overall forward or backward operation of the up-down moving unit 16, that is, the spatial position of the grouting rod 13 is adjusted by the moving bracket 14, the up-down moving unit 16, and the forward-backward unit 11, and then the elevation angle of the grouting rod 13 is adjusted by the angle adjustment bracket 15, that is, the up-down moving unit 16 is adjusted by the angle adjustment bracket 15 to adjust the elevation angle of the grouting rod 13, and then the rotary joint 12 and the rotary motor 1201 are both arranged in the up-down moving unit 16. Preferably, the rotary joint 12 can connect grouting rods 13 of different models, and then the model of the grouting rod 13 can be effectively adjusted, for example, the grouting rod 13 has a diameter of 3 cm, 5 cm or 9 cm. More preferably, the adjustable range of the elevation angle of the grouting rod 13 is 0 to 15°.

[0055] Furthermore, if Figure 3 , 5 As shown, the grouting rod 13 includes a drill bit at the end and a grouting nozzle connected to the drill bit, the grouting nozzle includes a housing chamber 1301 and a confluence pipe 23 disposed inside the housing chamber 1301, and a second grouting pipe 2102, the housing chamber 1301 is also connected to the air pipe of the air compressor 5, and the drill bit can be used to drill holes in simulated rock and soil. Among them, adding fine sand to part of the slurry can increase the cutting of rock and soil to enhance the jet grouting effect, and high-pressure gas is used to provide jet pressure to enhance the jet effect, and then the grouting nozzle can achieve the mixing of gas, slurry, and sand, and achieve the synergistic effect of the three to enhance the grouting jet effect.

[0056] Furthermore, if Figure 6 As shown, a detachable panel 331 is provided on one side of the model box 33 close to the grouting rod 13. Specifically, a reserved hole position 332 is provided on the detachable panel 331, and the reserved hole position 332 is used for positioning the grouting rod 13 to extend or drill a hole. In actual tests, corresponding grouting holes can be pre-set in the simulated rock and soil corresponding to the reserved hole position 332, and the grouting hole is used for the end of the grouting rod 13 to extend. If no corresponding grouting hole is set in the simulated rock and soil, the reserved hole position 332 is used as the positioning point, and the drill bit of the grouting rod 13 is used to perform real-time drilling. In addition, the reserved hole position 332 on the detachable panel 331 can prevent the slurry from flowing outward along the drill hole during the test, and multiple detachable panels 331 with different hole positions are provided to facilitate grouting at different positions at the same time.

[0057] Furthermore, the control system 4 includes a PLC control system, which regulates the rotary jet grouting system, grouting system, and air compressor 5 through the PLC control system, thereby realizing intelligent control of the test to meet different test design requirements, and ultimately realizing intelligent control of parameters such as injection pressure, injection flow, rotation speed, rotation mode, lifting speed, lifting mode, and ground stress loading, so as to adapt to the rotary jet grouting test device for simulating rock and soil with different densities, and using polyurethane double slurry to realize nearly full-scale horizontal rotary jet grouting simulation of multiple working conditions in the tunnel, so as to ultimately achieve the purpose of obtaining the optimal grouting parameters.

[0058] Further, in order to better illustrate the structure of the test device in the present invention, the following is an explanation through a specific use process:

[0059] Step S1, filling rock and soil;

[0060] Clean and dry the inside of the model box 33, fill and compact the rock and soil in layers; roughen the surface of each layer of rock and soil after filling and compacting to prevent the formation of structural surfaces; add pure water to make the rock and soil after drying reach the target moisture content; after each layer of compaction, measure the rock and soil density as a control indicator; during the filling process, bury sensors according to test requirements.

[0061] Step S2, applying vertical load;

[0062] The model box 33 is moved to the bottom of the hydraulic cylinder 31 and fixed thereto by means of the pushing device 34, and a vertical load is applied thereto, so as to simulate a certain degree of ground stress.

[0063] Step S3, drilling with a rotary jet grouting rod;

[0064] The position of the grouting rod 13 is adjusted left and right and up and down by the moving bracket 14 and the up and down moving unit 16, and the elevation angle of the grouting rod 13 is adjusted by the angle adjustment bracket 15, and the horizontal forward and backward unit 11 and the rotating motor 1201 are started separately, so that the grouting rod 13 passes through the reserved hole 332 and drills into the rock and soil to a certain depth;

[0065] Step S4, rotary jet grouting test;

[0066] The material storage box 21 is equipped with sufficient polyurethane material A and material B, and the first grouting pipe 2101, the second grouting pipe 2102, the sand injection pipe 2401, and the confluence pipe 23 between the material storage box 21, the sand injection assembly 24 and the grouting rod 13 are connected, and the rotary jet system, the grouting system, and the air compressor 5 are started, and various grouting parameters such as injection pressure, rotation speed, and lifting speed are controlled by the control system 4 to perform backward rotary jet grouting, wherein the material storage box 21 provides the polyurethane material A and material B to the grouting rod 13 through the first grouting pipe 2101 and the second grouting pipe 2102, and the confluence pipe 23 is formed by the first grouting pipe 2101 and the sand injection pipe 2401 in parallel and extends into the grouting rod 13;

[0067] When the lifting distance of the grouting rod 13 is about 4 / 5 of the initial drilling depth, the rotary jet system, the grouting system, and the air compressor 5 are turned off, and the rotary jet grouting is stopped; after half an hour, the rock and soil are cleaned, and the slurry diffusion and the pile forming effect are observed.

[0068] Step S5, cleaning the grouting pipeline;

[0069] After the grouting is completed, the grouting pipeline is cleaned immediately. A special cleaning liquid is injected into the entire pipeline through the air compressor 5 to ensure that the cleaning liquid can flow out from the nozzle to prevent the residual polyurethane A material and B material from gelling and solidifying quickly, blocking the pipeline and causing it to be scrapped.

[0070] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A horizontal rotary jet grouting test device, characterized in that: The device comprises a loading system for making simulated rock and soil, a rotary jet system for performing grouting operations on the simulated rock and soil, a grouting system, an air compressor (5) and a control system (4) for controlling grouting parameters; The rotary grouting system comprises a grouting rod (13) and an orientation assembly for adjusting the spatial position of the grouting rod (13); the end of the grouting rod (13) is arranged on a rotating joint (12); the rotating joint (12) is arranged in the orientation assembly; the rotating joint (12) is used to control the axial rotation of the grouting rod (13); the grouting rod (13) is also connected to the grouting system and the air compressor (5) respectively; The grouting system comprises a material storage box (21) for storing material A and material B, a sand injection assembly (24), and a grouting machine (22) connected to the material storage box (21); the grouting machine (22) is also connected to an air compressor (5); the material storage box (21) is used to provide material A and material B to the grouting rod (13); the sand injection assembly (24) is used to provide fine sand to the grouting rod (13); in actual application, the fine sand is pre-combined with material A or material B to form a mixed slurry; The control system (4) is used to regulate the rotary jet system, the grouting system, and the air compressor (5).

2. The horizontal rotary jet grouting test device according to claim 1 is characterized in that: The orientation assembly comprises a movable bracket (14) for adjusting the left-right position of a grouting rod (13), an up-down movable unit (16) for adjusting the up-down position of the grouting rod (13), and a forward-backward unit (11) for adjusting the front-back position of the grouting rod (13); an angle adjustment bracket (15), an up-down movable unit (16), and a forward-backward unit (11) are arranged above the movable bracket (14).

3. The horizontal rotary jet grouting test device according to claim 2 is characterized in that: A plurality of groups of pulleys are arranged at the bottom of the movable bracket (14), and each group of pulleys is used to control the movable bracket (14) to slide back and forth on a corresponding parallel track.

4. The horizontal rotary jet grouting test device according to claim 2, characterized in that: The up-and-down moving unit (16) and the forward-and-backward moving unit (11) are arranged on the angle adjustment bracket (15), and the forward-and-backward moving unit (11) is used to adjust the overall operation of the up-and-down moving unit (16); The rotary joint (12) is also connected to a rotary motor (1201), and the rotary joint (12) and the rotary motor (1201) are both arranged in the up-and-down moving unit (16); The angle adjustment bracket (15) is used to adjust the up and down moving unit (16) to adjust the elevation angle of the grouting rod (13).

5. The horizontal rotary jet grouting test device according to any one of claims 1 to 4, characterized in that: The material storage box (21) is connected to the grouting rod (13) through a first grouting pipe (2101) and a second grouting pipe (2102), respectively; the sand injection assembly (24) is connected to the grouting rod (13) through a sand injection pipe (2401); the first grouting pipe (2101) and the sand injection pipe (2401) are connected in parallel and merged into a merging pipe (23); the merging pipe (23) and the second grouting pipe (2102) extend into the grouting rod (13).

6. The horizontal rotary jet grouting test device according to claim 5, characterized in that: The grouting rod (13) comprises a drill bit at the end and a grouting nozzle connected to the drill bit, the grouting nozzle comprises a receiving chamber (1301), a junction pipe (23) disposed inside the receiving chamber (1301), and a second grouting pipe (2102), and the receiving chamber (1301) is also connected to the air pipe of the air compressor (5).

7. The horizontal rotary jet grouting test device according to claim 5, characterized in that: The loading system comprises a reaction frame (32), a hydraulic cylinder (31) whose top is connected to the reaction frame (32), a model box (33) and a pushing assembly (34); A loading plate (35) is connected below the hydraulic cylinder (31), and the loading plate (35) is used to compact the simulated rock and soil in the model box (33); The model box (33) is arranged on the pushing assembly (34), and a detachable panel (331) is provided on a side of the model box (33) close to the grouting rod (13); The hydraulic cylinder (31) is connected to a hydraulic station (37) via a hydraulic pipe (36).

8. The horizontal rotary jet grouting test device according to claim 7, characterized in that: The hydraulic station (37) is also in communication with the sand injection assembly (24).

9. The horizontal rotary jet grouting test device according to claim 7, characterized in that: The detachable panel (331) is provided with a reserved hole (332), and the reserved hole (332) is used for positioning the grouting rod (13) to be inserted or drilled; the control system (4) comprises a PLC control system.

10. A method for using the horizontal rotary jet grouting test device according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: Step 1, using a loading system to perform filling-compacting operations in a model box to produce simulated rock and soil with a preset rock and soil density; Step 2, adjusting the position and elevation angle of the rotary jet grouting rod by moving the bracket, the up-and-down moving unit, and the angle adjustment bracket, and drilling the rotary jet grouting rod into the simulated rock and soil to a preset depth by the horizontal forward and backward device and the rotating motor; Step 3, connecting the first grouting pipe, the second grouting pipe, the sand injection pipe, and the confluence pipe between the material storage box, the sand injection assembly and the grouting rod, and starting the rotary jet system, the grouting system, the air compressor, and controlling the grouting parameters through the control system to perform backward rotary jet grouting, wherein the material storage box provides polyurethane material A and material B to the grouting rod through the first grouting pipe and the second grouting pipe, and the confluence pipe is formed by connecting the first grouting pipe and the sand injection pipe in parallel and extends into the grouting rod; Step 4, when the lifting distance of the grouting rod is 4 / 5 of the initial drilling depth, the rotary jet grouting system, the grouting system, and the air compressor are turned off to stop the rotary jet grouting; Step 5. After the grouting is completed, inject cleaning fluid into all pipelines through an air compressor to clean the grouting pipelines.

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