Three-liquid composite grouting material trial preparation device based on field test

Abstract

The invention relates to the technical field of composite grouting material trial preparation, in particular to a three-liquid composite grouting material trial preparation device based on field test, which comprises a support frame body, a material trial preparation mechanism is bolted in the support frame body, a liquid storage tank is bolted at the top of the support frame body, and three storage cavities are arranged in the liquid storage tank. Each liquid storage cavity is communicated with the material fitting mechanism through a servo metering pump and a flow sensor; the material trial-mixing mechanism comprises a trial-mixing tank, a premixing cavity, a main mixing cavity and a homogenizing cavity are sequentially arranged in the trial-mixing tank from top to bottom, three opposite nozzles are circumferentially distributed in the premixing cavity, and adjustable throttling assemblies are connected among the outer sides of the three opposite nozzles in a bolted mode. The three-liquid composite grouting material trial preparation device based on the field test has the advantages that the mixing uniformity is good, and the actual stratum osmotic pressure environment can be simulated.

Description

Technical Field

[0001] This invention relates to the field of composite grouting material trial mixing technology, specifically a three-liquid composite grouting material trial mixing device based on field testing. Background Technology

[0002] As is well known, in the fields of underground engineering, tunnel construction, and foundation reinforcement, the three-liquid composite grouting technology has become one of the core technologies for solving engineering problems under complex geological conditions because it can achieve rapid setting, high-strength stone body formation, and excellent seepage prevention and water plugging effects through the synergistic reaction of three grouts. The rationality of the three-liquid composite grouting material ratio directly determines the grouting effect. Its trial mixing process needs to accurately simulate the actual working conditions on site to ensure that the trial mixing parameters can directly guide the on-site construction. Therefore, the practicality, accuracy, and adaptability of the on-site trial mixing device are crucial.

[0003] However, the performance of three-liquid composite grouting materials is affected by multiple factors such as proportioning accuracy, mixing uniformity, ambient temperature, and formation osmotic pressure. On-site trial mixing is a key step to ensure grouting effect. Currently, most existing devices use a single mixing tank or simple mixer for grout preparation. For three-liquid composite systems, accurate metering and instantaneous uniform mixing of each component are prerequisites for ensuring the consistency of the performance of the trial materials. Traditional manual proportioning or simple mechanical stirring is difficult to achieve high-precision metering and is prone to generating mixing dead zones, resulting in a large deviation between the trial mixing results and the actual grouting effect. In particular, when mixing the quick-setting components, premature local setting will seriously affect the subsequent grouting performance. In addition, existing test mixing devices suffer from a lack of or limited simulation of on-site working conditions. They can only operate under normal temperature and pressure, and cannot reproduce key on-site working parameters. In underground engineering, factors such as formation osmotic pressure, ambient temperature, and grouting pressure directly affect the setting rate of grout, the strength of the aggregate, and the permeation and diffusion effect. However, existing devices lack corresponding simulation structures, which makes the parameters of laboratory test mixing easily invalid during on-site construction, resulting in the problem of "test mixing qualified, grouting failure". Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a three-liquid composite grouting material trial mixing device based on field testing, which has the advantages of good mixing uniformity and the ability to simulate the actual formation osmotic pressure environment.

[0005] (II) Technical Solution The above-mentioned technical objective of the present invention is achieved through the following technical solution: a three-liquid composite grouting material trial preparation device based on field testing, including a support frame, a material trial preparation mechanism is bolted inside the support frame, a liquid storage tank is bolted to the top of the support frame, and the liquid storage tank is provided with three storage chambers inside, each of which is connected to the material trial preparation mechanism through a servo metering pump and a flow sensor. The material mixing mechanism includes a mixing tank. The interior of the mixing tank is provided with a premixing chamber, a main mixing chamber, and a homogenizing chamber from top to bottom. The premixing chamber has three opposing nozzles arranged circumferentially. An adjustable throttling component is bolted between the outer sides of the three opposing nozzles. The other end of each opposing nozzle is connected to a corresponding liquid storage chamber through a pipeline. A rotating shaft is rotatably connected inside the mixing tank. A homogenizing component is fitted onto the bottom end of the rotating shaft surface, and a double-layer spiral stirring blade is fixedly welded to the top end of the rotating shaft surface. The double-layer spiral stirring blade and the homogenizing component are located inside the main mixing chamber and the homogenizing chamber, respectively.

[0006] By adopting the above technical solution, a material mixing mechanism is set up. Utilizing the synergy of a servo metering pump, flow sensor, and adjustable throttling component, independent quantitative delivery and dynamic ratio adjustment of the three slurries are achieved, avoiding flow fluctuations and slurry backflow, ensuring ratio accuracy, and allowing real-time adjustments during the mixing process to adapt to the mixing requirements of different geological conditions. Furthermore, a three-stage stepped mixing structure of premixing, main mixing, and homogenization is adopted, combined with opposing nozzle flushing, double-layer spiral stirring, and homogenization component disturbance, to specifically solve the problem of stratified mixing caused by differences in viscosity and density of the three liquids. This achieves thorough homogenization of the slurry from macroscopic to microscopic levels, avoiding premature local reactions. It also has a linkage function between mixing and testing. A viscosity detection probe is integrated in the homogenization chamber to provide real-time feedback on the performance of the mixed slurry, facilitating rapid iteration of the mixing scheme and significantly improving mixing efficiency.

[0007] The present invention is further configured such that: a transmission box is bolted to the top of the rotating shaft, and an input shaft is bolted to the right side of the transmission box; the other end of the input shaft extends to the outside of the test tank and is bolted to a variable frequency motor; the inside of the liquid storage tank is rotatably connected to the rotating shaft, and a number of stirring blades are fixedly mounted on the surface of the rotating shaft; two adjacent stirring blades are arranged as a group and are located inside the corresponding liquid storage chamber.

[0008] Using the above technical solution, the power output by the variable frequency motor is reduced and increased in torque by the transmission box to drive the rotating shaft to rotate. The rotating shaft simultaneously drives the double-layer spiral stirring blades in the main mixing chamber and the homogenization components in the homogenization chamber. The variable frequency motor can achieve stepless speed regulation and adjust the stirring intensity according to the viscosity of the slurry. When processing high-viscosity slurry, the speed is increased to enhance hybrid power, and when processing low-viscosity slurry, the speed is reduced to reduce energy consumption and cavitation, thus achieving intelligent matching between power and working conditions. The continuous operation of the stirring blades in the storage chamber effectively prevents the segregation and stratification of easily sedimenting slurries such as cement slurry, ensuring that the slurry delivered to the mixing system always maintains its initial uniform state and avoids the impact of storage sedimentation on the accuracy of the proportioning.

[0009] The present invention is further configured such that: the test mixing tank is a double-layer structure, the outer layer is an electrically heated insulation jacket, and the inner layer is a mixing chamber. Temperature sensors are provided inside both the jacket and the mixing chamber, and an electric heating wire is provided inside the jacket.

[0010] By adopting the above technical solution, the test mixing tank is set as a double-layer structure, with an outer layer of electrically heated insulation jacket and an inner layer of mixing chamber. Temperature sensors are installed in both the jacket and the mixing chamber, which realizes precise control of the temperature during the slurry mixing process and eliminates the influence of diurnal temperature variation and seasonal changes on the slurry gelation time and stone performance.

[0011] The present invention is further configured such that: the outlet of the test tank is provided with a pressure regulating valve and a booster pump, the inlets of the pressure regulating valve and the booster pump are connected to the homogenization chamber, and the homogenization chamber is provided with a viscosity detection probe.

[0012] By adopting the above technical solution, a viscosity detection probe is installed in the homogenization chamber to realize online real-time monitoring of slurry viscosity. This allows operators to grasp the slurry state without taking samples. As a key parameter reflecting the uniformity of mixing and the reaction process, the real-time data of viscosity provides a direct basis for ratio optimization and performance judgment. Furthermore, through the cooperation of the booster pump and the pressure regulating valve, the output slurry pressure is adjustable and controllable, which can simulate the grouting pressure requirements under different grouting depths and different strata conditions, and realize the connection between the trial mixing process and the on-site construction conditions.

[0013] The invention is further configured such that: the homogenization component includes a follower ring, which is fixedly sleeved on the bottom end of the rotating shaft surface; the top of the follower ring is provided with three homogenization perforated plates, which are stacked and movably sleeved on the surface of the rotating shaft; two support plates are rotatably sleeved on the surface of the rotating shaft; a support rod is slidably inserted through the interior of each support plate in an annular shape; one end of each support rod is welded to the top and bottom homogenization perforated plates respectively; a spring is sleeved on the surface of each support rod; the two ends of the top spring are bolted to the top homogenization perforated plate and the top support plate respectively; the two ends of the bottom spring are bolted to the bottom homogenization perforated plate and the bottom support plate respectively; a disturbance element is provided in the homogenization holes of the homogenization perforated plates; several push columns are annularly welded to the bottom of the bottom homogenization perforated plate; several push blocks are annularly welded to the top of the follower ring, and the push blocks cooperate with the push columns.

[0014] Using the above technical solution, by setting up a homogenization component, the rotating shaft drives the follower ring to rotate synchronously when it rotates. The push block at the top of the follower ring moves in a circular motion with the rotating shaft. When the push block rotates to contact the push column on the bottom homogenization plate, the push column is pushed upward, causing multiple homogenization plates to move upward along the rotating shaft. At the same time, the top homogenization plate pushes the top support rod upward and compresses the spring on the top support rod. After the push block rotates past the push column position, the spring returns to its original position and pushes the homogenization plate downward. During the continuous rotation of the rotating shaft, the push block periodically cooperates with the push column. By making the three-layer homogenizing orifice plate reciprocate in the vertical direction, the slurry is subjected to shearing action at the edges of the orifice and dynamic disturbance action of the up-and-down vibration of the orifice plate as it flows through the homogenizing holes and disturbance components on the homogenizing orifice plate. This combined force can effectively break up the residual micro-agglomerates in the slurry, achieving full homogenization at the micro level of the slurry. Furthermore, the multi-layer orifice plate stacking layout extends the flow path of the slurry in the homogenization chamber, so that the slurry undergoes a shearing and dispersion process as it passes through each layer of orifice plate. The multi-stage series connection ensures the homogenization effect while also allowing micro-bubbles to be eliminated step by step.

[0015] The invention is further configured such that: the disturbance component includes a shaft, the surface of which is fixedly sleeved with three fixing brackets, both ends of which are welded to the inner wall of the homogenization hole of each homogenization plate; the surface of the shaft is rotatably sleeved with several bushings, and the surface of the bushings is annularly welded with several arc-shaped disturbance plates; the bushings and disturbance plates are located within the homogenization hole of each homogenization plate.

[0016] By employing the above technical solution, when the slurry flows through the holes in the homogenizing plate, the flow impacts the arc-shaped disturbance plate. The curved surface design of the arc-shaped disturbance plate generates a tangential force from the flow impact, driving the bushing to rotate the arc-shaped disturbance plate around the shaft. The rotating arc-shaped disturbance plate exerts continuous shearing and disturbance on the slurry passing through the holes, forming local micro-vortices within the holes. Moreover, the disturbance components in different holes rotate independently without interfering with each other. As the slurry flow rate changes, the rotation speed of the disturbance plate changes accordingly. The higher the flow rate, the stronger the disturbance. Furthermore, the rotational motion of the arc-shaped disturbance plate forms local vortices within the holes, which helps to release air bubbles trapped in the slurry and improve the density of the stone.

[0017] The invention is further configured such that: the adjustable throttling assembly includes a fixed ring, an end face toothed ring is rotatably connected to the bottom of the fixed ring, a drive gear is rotatably connected to the top of the fixed ring via a mounting bracket, and the drive gear meshes with the end face toothed ring; three connecting pipes are circumferentially distributed inside the fixed ring, the three connecting pipes are fixedly connected to corresponding opposite nozzles, and the other end of the three connecting pipes is connected to a corresponding liquid storage chamber; two liquid outlet plates are welded inside the connecting pipes, a throttling orifice plate is rotatably connected between the two liquid outlet plates, a follower toothed ring is welded to the surface of the throttling orifice plate, a sealing structure is provided at the connection between the follower toothed ring and the connecting pipe, and the follower toothed ring meshes with the end face toothed ring.

[0018] By adopting the above technical solution, an adjustable throttling component is set up. A drive motor fixedly installed by the mounting bracket drives the drive gear to rotate. The drive gear drives the end face toothed ring to rotate within the fixed ring. The end face toothed ring, as a common transmission element, meshes with the follower toothed rings in the three connecting pipes simultaneously. This causes the follower toothed rings to drive the throttling orifice plates in their respective connecting pipes to rotate synchronously. By changing the relative angle between the throttling orifice plate and the two fixed liquid outlet orifice plates, the flow area formed by the overlap of the three is adjusted. The relative rotation of the throttling orifice plate and the fixed liquid outlet orifice plate forms a variable throttling area. The flow rate adjustment is continuous and stepless with high adjustment accuracy, which can meet the trial mixing requirements of different mixing ratio accuracy requirements.

[0019] The present invention is further configured such that: the material testing and mixing mechanism further includes a formation osmotic pressure simulation component, the formation osmotic pressure simulation component includes three horizontally arranged high-strength observation shells, the interior of the high-strength observation shells is provided with a flexible isolation sleeve made of highly elastic alkali-resistant rubber, the top of the high-strength observation shells is bolted with an end cap, the flexible isolation sleeve divides the interior of the high-strength observation shells into an osmotic pressure simulation chamber and a slurry forming chamber, the interior of the high-strength observation shells is bolted with several porous water distribution plates arranged in a stacked manner, and the porous water distribution plates are located inside the osmotic pressure simulation chamber, the interior of the osmotic pressure simulation chamber is provided with a high-precision pressure sensor.

[0020] Using the above technical solution, by setting up a formation osmotic pressure simulation component, in underground engineering sites, after the grout is injected into the formation, it will be subjected to all-round osmotic pressure generated by the pore water of the surrounding rock and soil. This pressure is the static pressure of the formation pore water on the grout, which is evenly distributed at the contact interface between the grout and the formation, directly affecting the grout's setting speed, the strength of the aggregate, and the osmotic diffusion effect. The working principle of the formation osmotic pressure simulation component is to replicate this mechanical environment: a flexible isolation sleeve is installed inside a high-strength observation shell and sealed by end caps, dividing the shell into an outer osmotic pressure simulation chamber and an inner grout forming chamber. The grout, after being mixed and homogenized in a test tank, is injected into the grout forming chamber through an inlet valve, while a high-pressure water injection system injects high-pressure water into the osmotic pressure simulation chamber. The high-pressure water passes through a porous cloth... After the water plate is evenly distributed, a uniformly distributed circumferential static pressure is formed in the osmotic pressure simulation chamber. This static pressure is transmitted to the outer wall of the slurry sample through a flexible isolation sleeve, realizing the mechanical equivalent conversion from formation pore water pressure to component circumferential water pressure to slurry stress. Furthermore, the water pressure in the osmotic pressure simulation chamber is monitored in real time by a high-precision pressure sensor, and the signal is fed back to the control system. The control system adjusts the water injection system to maintain a constant set pressure and observes the slurry completing the solidification and hardening process under the continuous action of osmotic pressure. The incompressibility of water is used to form a uniform static pressure field with high-pressure water in the osmotic pressure simulation chamber. The pressure is transmitted to the slurry sample through the flexible isolation sleeve. The pressure distribution and direction of action are completely consistent with the field formation osmotic pressure, solving the core problem of the disconnect between the operating conditions of the existing test equipment.

[0021] The invention is further configured such that: the top of the end cap is respectively fixedly connected to an inlet valve and an exhaust valve, the inlet valve is connected to the outlet pipeline of the test tank through a quick-release connector, the exhaust valve corresponds to the osmotic pressure simulation chamber and the slurry forming chamber respectively, and the rear sides of the three high-strength observation shells are connected to a T-connector through a quick-release connector, and the other end of the T-connector is connected to a plunger metering pump.

[0022] By adopting the above technical solution, the coordinated design of the inlet valve and the vent valve ensures that the slurry is filled without air bubbles. The vent valve is located at the highest point of the molding chamber, which can completely remove the air displaced during the injection process, avoiding the impact of residual air bubbles on the strength and impermeability of the specimens. Furthermore, by connecting the three osmotic pressure simulation chambers in parallel through a three-way pipe, the synchronous molding of multiple specimens under the same osmotic pressure conditions is realized, which facilitates parallel comparison tests, eliminates the influence of pressure differences between batches on the test results, and improves the statistical reliability of the test data.

[0023] The invention is further configured such that: the top of both the high-strength observation shell and the flexible isolation sleeve are provided with sealing protrusions, and the surface of the sealing protrusions is in close contact with the inner wall of the end cap; the interior of the flexible isolation sleeve is filled with several annular skeletons.

[0024] By adopting the above technical solution, a double seal is formed by the high-strength observation shell and the sealing protrusion on the top of the flexible isolation sleeve, ensuring reliable sealing performance and preventing leakage under high pressure osmotic pressure environment. This avoids simulation distortion caused by pressure loss, ensures the accuracy of formation osmotic pressure simulation, and provides a real stress environment for trial fitting. The annular skeleton provides structural support for the flexible isolation sleeve, which not only ensures the shape stability of the isolation sleeve under high pressure and makes the pressure transmission path clear and controllable, but also does not affect the uniform pressure transmission characteristics.

[0025] (III) Beneficial Effects Compared with the prior art, the present invention provides a three-liquid composite grouting material trial preparation device based on field testing, which has the following beneficial effects: This field-tested three-component composite grouting material mixing device, through the setting of a material mixing mechanism, utilizes the synergy of a servo quantitative pump, flow sensor, and adjustable throttling component to achieve independent quantitative delivery and dynamic ratio adjustment of the three grouts, avoiding flow fluctuations and grout backflow, ensuring ratio accuracy, and allowing real-time adjustments during the mixing process to adapt to the mixing requirements of different geological conditions. Furthermore, it employs a three-stage stepped mixing structure of premixing, main mixing, and homogenization, combined with opposing nozzle flushing, double-layer spiral stirring, and homogenization orifice plate disturbance, specifically addressing the stratification mixing problem caused by differences in viscosity and density of the three grouts. This achieves thorough homogenization of the grout from macroscopic to microscopic levels, preventing premature local reactions. It also features a mixing and testing linkage function, with a viscosity detection probe integrated in the homogenization chamber providing real-time feedback on the mixed grout performance, facilitating rapid iteration of mixing schemes and significantly improving mixing efficiency. By setting up a formation osmotic pressure simulation component, in underground engineering sites, after grout is injected into the formation, it will be subjected to all-round osmotic pressure generated by the pore water of the surrounding rock and soil (essentially the static pressure of the formation pore water on the grout). This pressure is evenly distributed at the contact interface between the grout and the formation, affecting the grout's setting rate, the strength of the aggregate, and the osmotic diffusion effect. The formation osmotic pressure simulation component replicates this mechanical environment through a ring-shaped pressure chamber design. The grout sample is formed in the grout forming chamber, surrounded by a pressure conduction zone formed by the osmotic pressure simulation chamber. The high-pressure water injection system injects water into the osmotic pressure simulation chamber. High-pressure water forms a uniformly distributed circumferential static pressure. This static pressure is transmitted to the outer wall of the grout sample through the pressure transmission zone and flexible isolation sleeve, realizing the mechanical equivalent conversion from formation pore water pressure to component circumferential water pressure to grout stress. This ensures that the distribution and direction of pressure on the grout are consistent with the field conditions. By utilizing the incompressibility of water, the high-pressure water in the pressure transmission zone forms a static pressure field, which can simulate the uniformity of formation osmotic pressure. Therefore, the grout is subjected to the same stress and environmental conditions as the field during the trial mixing process, solving the core problem of the disconnect between the operating conditions of the existing trial mixing device. Attached Figure Description

[0026] Figure 1This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the material testing and mixing mechanism in this invention; Figure 3 This is a schematic diagram of the homogenization component in this invention; Figure 4 This is a schematic diagram of the disturbance component in this invention; Figure 5 This is a schematic diagram of the adjustable throttling component in this invention; Figure 6 This is a schematic diagram of the liquid storage tank in this invention; Figure 7 This is a schematic diagram of the formation osmotic pressure simulation component in this invention; Figure 8 In this invention Figure 7 Enlarged diagram of point A in the middle.

[0027] In the diagram: 1. Support frame; 2. Material mixing mechanism; 21. Mixing tank; 22. Opposing nozzle; 23. Adjustable throttling assembly; 231. Fixing ring; 232. End face gear ring; 233. Drive gear; 234. Connecting pipe; 235. Liquid outlet orifice plate; 236. Throttling orifice plate; 237. Follower gear ring; 24. Rotating shaft; 25. Homogenization assembly; 251. Follower ring; 252. Homogenization orifice plate; 253. Support plate; 254. Support rod; 255. Spring; 256. Disturbance element; 256a. Shaft; 256b. Fixing frame; 25 6c. Bushing; 256d. Arc-shaped disturbance plate; 257. Push column; 258. Push block; 26. Double-layer spiral stirring blade; 27. Premixing chamber; 28. Main mixing chamber; 29. ​​Homogenization chamber; 3. Formation osmotic pressure simulation component; 31. High-strength observation shell; 32. Flexible isolation sleeve; 33. End cap; 34. Osmotic pressure simulation chamber; 35. Slurry forming chamber; 36. Porous water distribution plate; 4. Liquid storage tank; 5. Transmission box; 6. Input shaft; 7. Rotating shaft; 8. Stirring blade; 9. T-connector; 10. Sealing protrusion; 11. Annular skeleton. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1 Please see Figure 1-6A three-liquid composite grouting material trial preparation device based on field testing includes a support frame 1, a material preparation mechanism 2 is bolted inside the support frame 1, a liquid storage tank 4 is bolted to the top of the support frame 1, and the liquid storage tank 4 is provided with three storage chambers inside, each of which is connected to the material preparation mechanism 2 through a servo metering pump and a flow sensor. The material mixing mechanism 2 includes a mixing tank 21. Inside the mixing tank 21, from top to bottom, are a premixing chamber 27, a main mixing chamber 28, and a homogenizing chamber 29. The premixing chamber 27 has three opposing nozzles 22 arranged circumferentially. An adjustable throttling assembly 23 is bolted between the outer sides of the three opposing nozzles 22. The other ends of the opposing nozzles 22 are connected to corresponding liquid storage chambers via pipelines. A rotating shaft 24 is rotatably connected inside the mixing tank 21. A homogenizing assembly 25 is fitted onto the bottom end of the rotating shaft 24, and a double-layered spiral stirring blade 26 is fixedly welded to the top end of the rotating shaft 24. The double-layered spiral stirring blade 26 and the homogenizing assembly 25 are located inside the main mixing chamber 28 and the homogenizing chamber 29, respectively. By setting up the material mixing mechanism 2, a servo metering pump is used... The coordinated operation of the flow sensor and the adjustable throttling component 23 enables independent quantitative delivery and dynamic ratio adjustment of the three slurries, avoiding flow fluctuations and slurry backflow, ensuring ratio accuracy, and allowing real-time adjustment during trial mixing to adapt to the trial mixing requirements of different geological conditions. Furthermore, the three-stage stepped mixing structure of premixing, main mixing, and homogenization, combined with the counter-current nozzles 22, double-layer spiral stirring, and the disturbance of the homogenization component 25, specifically addresses the stratification mixing problem caused by differences in viscosity and density of the three liquids, achieving full homogenization of the slurry from macroscopic to microscopic levels, avoiding premature local reactions, and also has a trial mixing and testing linkage function. The homogenization chamber 29 integrates a viscosity detection probe to provide real-time feedback on the performance of the mixed slurry, facilitating rapid iteration of trial mixing schemes and significantly improving trial mixing efficiency.

[0030] The top of the rotating shaft 24 is bolted to a transmission box 5, and the right side of the transmission box 5 is bolted to an input shaft 6. The other end of the input shaft 6 extends to the outside of the test tank 21 and is bolted to a variable frequency motor. The inside of the storage tank 4 is rotatably connected to a rotating shaft 7, and several stirring blades 8 are fixedly mounted on the surface of the rotating shaft 7. Two adjacent stirring blades 8 are arranged as a group and are located inside the corresponding storage chamber. The power output by the variable frequency motor drives the rotating shaft 24 to rotate after being reduced and increased in torque by the transmission box 5. The rotating shaft 24 simultaneously drives the double-layer spiral agitator in the main mixing chamber 28. The mixing blades 26 and the homogenization components 25 in the homogenization chamber 29 operate, and the variable frequency motor can achieve stepless speed regulation. The stirring intensity is adjusted according to the viscosity of the slurry. When processing high viscosity slurry, the speed is increased to enhance hybrid power, and when processing low viscosity slurry, the speed is reduced to reduce energy consumption and cavitation, thus achieving intelligent matching of power and working conditions. The continuous operation of the mixing blades 8 in the storage chamber effectively prevents the segregation and stratification of easily sedimenting slurries such as cement slurry, ensuring that the slurry delivered to the mixing system always maintains its initial uniform state and avoids the impact of storage sedimentation on the accuracy of the proportioning.

[0031] The test mixing tank 21 has a double-layer structure, with an outer layer of electrically heated insulation jacket and an inner layer of mixing chamber. Temperature sensors are installed inside both the jacket and the mixing chamber, and the jacket contains an electric heating wire. By setting the test mixing tank 21 to a double-layer structure with an outer layer of electrically heated insulation jacket and an inner layer of mixing chamber, and by installing temperature sensors in both the jacket and the mixing chamber, precise control of the temperature during the slurry mixing process is achieved, eliminating the influence of diurnal temperature variations and seasonal changes on the slurry gelation time and stone performance.

[0032] The outlet of the test mixing tank 21 is equipped with a pressure regulating valve and a booster pump. The inlets of the pressure regulating valve and the booster pump are connected to the homogenization chamber 29, and the homogenization chamber 29 is equipped with a viscosity detection probe. By setting the viscosity detection probe in the homogenization chamber 29, online real-time monitoring of the slurry viscosity is realized, allowing operators to grasp the slurry state without sampling. Viscosity, as a key parameter reflecting the uniformity of mixing and the reaction process, provides a direct basis for ratio optimization and performance judgment through its real-time data. Furthermore, through the cooperation of the booster pump and the pressure regulating valve, the output slurry pressure is adjustable and controllable, which can simulate the grouting pressure requirements under different grouting depths and different geological conditions, realizing the connection between the test mixing process and the on-site construction conditions.

[0033] The homogenization component 25 includes a follower ring 251, which is fixedly sleeved on the bottom end of the surface of the rotating shaft 24. Three homogenization perforated plates 252 are provided on the top of the follower ring 251. The three homogenization perforated plates 252 are stacked and movably sleeved on the surface of the rotating shaft 24. Two support plates 253 are rotatably sleeved on the surface of the rotating shaft 24. A support rod 254 slides through the interior of each support plate 253 in an annular shape. One end of the support rod 254 is welded to the top and bottom homogenization perforated plates 252, respectively. A spring 255 is sleeved on the surface of the support rod 254. The two ends of the top spring 255 are respectively connected to the top homogenization perforated plate 252. The homogenizing plate 252 and the top support plate 253 are bolted together. The two ends of the bottom spring 255 are respectively bolted to the bottom homogenizing plate 252 and the bottom support plate 253. A disturbance element 256 is provided inside the homogenizing holes of the homogenizing plate 252. Several pushing columns 257 are annularly welded to the bottom of the bottom homogenizing plate 252. Several pushing blocks 258 are annularly welded to the top of the following ring 251, and the pushing blocks 258 cooperate with the pushing columns 257. By setting the homogenizing component 25, when the rotating shaft 24 rotates, it drives the following ring 251 to rotate synchronously. The pushing blocks 258 on the top of the following ring 251 follow... The rotating shaft 24 performs a circular motion. When the pushing block 258 rotates to contact the pushing column 257 on the bottom homogenizing plate 252, the pushing column 257 is pushed upward, causing multiple homogenizing plates 252 to move upward along the rotating shaft 24. At the same time, the top homogenizing plate pushes the top support rod 254 upward and compresses the spring 255 on the top support rod 254. After the pushing block 258 rotates past the position of the pushing column 257, the spring 255 returns to its original position and pushes the homogenizing plate 252 downward. During the continuous rotation of the rotating shaft 24, the pushing block 258 periodically cooperates with the pushing column 257 to make the three layers The homogenizing orifice plate 252 reciprocates in the vertical direction, which causes the slurry to be subjected to the shearing action of the orifice edge and the dynamic disturbance of the up-and-down vibration of the orifice plate when it flows through the homogenizing holes and the disturbance element 256 on the homogenizing orifice plate 252. This combined force can effectively break up the residual micro agglomerates in the slurry and achieve full homogenization of the slurry at the micro level. In addition, the multi-layer orifice plate stacking layout extends the flow path of the slurry in the homogenization cavity 29, so that the slurry undergoes a shearing and dispersion process when passing through each layer of orifice plate. The multi-stage series connection ensures the homogenization effect and also allows micro bubbles to be eliminated step by step.

[0034] The disturbance component 256 includes a shaft 256a, with three fixed brackets 256b fixedly sleeved on the surface of the shaft 256a. Both ends of the fixed brackets 256b are welded to the inner wall of the homogenization holes of each homogenization plate 252. Several bushings 256c are rotatably sleeved on the surface of the shaft 256a, and several arc-shaped disturbance plates 256d are annularly welded to the surface of the bushings 256c. The bushings 256c and the disturbance plates are located within the homogenization holes of each homogenization plate 252. By setting the disturbance component 256, when the slurry flows through the holes in the homogenization plate 252, it impacts the arc-shaped disturbance plates 256d. The curved surface design of 256d generates a tangential force due to the flow impact, driving the bushing 256c to rotate the arc-shaped disturbance plate 256d around the shaft 256a. The rotating arc-shaped disturbance plate 256d exerts continuous shearing and disturbance on the slurry passing through the holes, forming local micro-vortices within the holes. Moreover, the disturbance components 256 in different holes rotate independently without interfering with each other. As the slurry flow rate changes, the rotation speed of the disturbance plate changes accordingly. The higher the flow rate, the stronger the disturbance. Furthermore, the rotational motion of the arc-shaped disturbance plate 256d forms local vortices within the holes, which helps to release air bubbles trapped in the slurry and improve the density of the stone.

[0035] The adjustable throttling assembly 23 includes a fixed ring 231. A toothed end face ring 232 is rotatably connected to the bottom of the fixed ring 231. A drive gear 233 is rotatably connected to the top of the fixed ring 231 via a mounting bracket, and the drive gear 233 meshes with the toothed end face ring 232. Three connecting pipes 234 are circumferentially distributed inside the fixed ring 231. The three connecting pipes 234 are fixedly connected to corresponding opposite nozzles 22, and the other end of each connecting pipe 234 is connected to a corresponding liquid storage chamber. Two liquid outlet plates 235 are welded inside the connecting pipes 234. A throttling orifice plate 236 is rotatably connected between the two liquid outlet plates 235. A follower toothed ring 237 is welded to the surface of the throttling orifice plate 236. A sealing structure is provided at the connection between the follower toothed ring 237 and the connecting pipe 234. The end face toothed ring 232 meshes with the drive gear 233, which is driven by a drive motor fixedly mounted on the mounting bracket through an adjustable throttling component 23. The drive gear 233 drives the end face toothed ring 232 to rotate within the fixed ring 231. The end face toothed ring 232, as a common transmission element, meshes with the follower toothed ring 237 in the three connecting pipes 234. This causes the follower toothed ring 237 to drive the throttling orifice plates 236 in their respective connecting pipes 234 to rotate synchronously. By changing the relative angle between the throttling orifice plate 236 and the two fixed liquid outlet orifice plates 235, the flow area formed by the overlap of the three is adjusted. The relative rotation of the throttling orifice plate 236 and the fixed liquid outlet orifice plate 235 forms a variable throttling area. The flow rate adjustment is continuous and stepless with high adjustment accuracy, which can meet the trial mixing requirements of different mixing ratio accuracy requirements.

[0036] The working principle of this embodiment is as follows: The operator sets the mixing ratio parameters of the three slurry components and the total flow requirement through the human-machine interface of the control system. The control system sends control commands to each servo metering pump according to the set values. After the servo metering pumps start, they extract the slurry components from the three storage chambers respectively. The flow sensor monitors the instantaneous flow rate in each pipeline in real time and feeds the signal back to the control system. The control system compares the measured flow rate with the set value. If there is a deviation, it dynamically adjusts the speed of the servo metering pump to form a closed-loop flow control, ensuring that the delivery volume of the three slurries strictly conforms to the preset ratio. The three slurries, after precise metering, enter the adjustable throttling component 23. The control system sends commands to the drive motor of the drive gear 233 according to the mixing ratio requirements. The adjustment command drives the gear 233 to rotate the end face gear ring 232. The end face gear ring 232, as a common transmission element, meshes simultaneously with the follower gear rings 237 in the three connecting pipes 234, causing the throttling orifice plates 236 in each connecting pipe 234 to rotate synchronously. The throttling orifice plates 236 rotate between two fixed liquid outlet orifice plates 235, changing the flow area formed by the overlap of the three, thereby synchronously throttling and regulating the three streams of slurry. The throttled and regulated slurry enters the three opposing nozzles 22 and is spatially opposed high-speed sprayed in the premixing chamber 27. The three streams of slurry collide, shear, and break each other, achieving preliminary micro-dispersion of the components. The premixed slurry enters the main mixing chamber 28 by gravity, and the variable frequency motor drives the rotating shaft 2 through the transmission box 5. 4. Rotation: The rotating shaft 24 drives the double-layer spiral stirring blades 26 (with a large pitch at the inlet and a small pitch at the outlet) to rotate, gradually compressing the slurry during stirring to achieve thorough mixing on a macroscopic scale. Simultaneously, the speed of the variable frequency motor can be automatically adjusted according to changes in slurry viscosity. When the viscosity value reported by the viscosity detection probe is high, the control system increases the motor speed to enhance hybrid mixing. After primary mixing, the slurry enters the homogenization chamber 29. The follower ring 251 at the bottom of the rotating shaft 24 rotates with the shaft. The push block 258 at the top of the follower ring 251 periodically contacts the push column 257 on the bottom homogenization perforated plate 252. The push column 257 drives the three-layer homogenization perforated plate 252 to reciprocate vertically along the rotating shaft 24. The slurry flows through the homogenization perforated plate 259. When the slurry passes through the orifice 2, the flow impacts the arc-shaped disturbance plate 256d inside the orifice, driving the bushing 256c to rotate the disturbance plate around the shaft 256a, forming local micro-vortices inside the orifice. This causes the slurry to be subjected to static shearing at the orifice edge, dynamic disturbance from the orifice vibration, and micro-vortices generated by the rotation of the disturbance plate as it passes through each layer of the orifice plate, achieving fine homogenization at the microscale. Moreover, the viscosity detection probe in the homogenization chamber 29 monitors the slurry viscosity in real time and feeds the data back to the control system. When the viscosity reaches the set range, the control system determines that the mixing uniformity is qualified. The homogenized slurry is pressurized and output under the action of the booster pump. The pressure regulating valve dynamically adjusts the valve opening according to the feedback signal from the outlet pressure sensor to keep the output pressure stable.The control system records and displays parameters such as flow rate, temperature, viscosity, and pressure in real time throughout the entire trial mixing process, providing data support for ratio optimization and performance evaluation.

[0037] Example 2 refer to Figure 7-8 A field-tested three-liquid composite grouting material trial mixing device also includes a formation osmotic pressure simulation component 3. The formation osmotic pressure simulation component 3 comprises three horizontally arranged high-strength observation shells 31. The interior of each high-strength observation shell 31 is equipped with a flexible isolation sleeve 32 made of highly elastic alkali-resistant rubber. An end cap 33 is bolted to the top of each high-strength observation shell 31. The flexible isolation sleeve 32 divides the interior of the high-strength observation shell 31 into an osmotic pressure simulation chamber 34 and a grout forming chamber 35. Several porous fabrics arranged in a stacked pattern are annularly bolted to the interior of each high-strength observation shell 31. Water plate 36, and the porous water distribution plate 36 is located inside the osmotic pressure simulation chamber 34. The osmotic pressure simulation chamber 34 is equipped with a high-precision pressure sensor. By setting up the formation osmotic pressure simulation component 3, in the underground engineering site, after the grout is injected into the formation, it will be subjected to the all-round osmotic pressure generated by the pore water of the surrounding rock and soil. This pressure is the static pressure of the formation pore water on the grout, which is evenly distributed at the contact interface between the grout and the formation, directly affecting the grout's setting speed, the strength of the stone body, and the osmotic diffusion effect. The working principle of the formation osmotic pressure simulation component 3 is to replicate this mechanical environment: flexible isolation sleeve The 32 is installed inside the high-strength observation housing 31 and sealed by the end cap 33, dividing the interior of the housing into an outer osmotic pressure simulation chamber 34 and an inner slurry forming chamber 35. The slurry, after being mixed and homogenized in the test tank 21, is injected into the slurry forming chamber 35 through the inlet valve. Meanwhile, a high-pressure water injection system injects high-pressure water into the osmotic pressure simulation chamber 34. After being evenly distributed by the porous water distribution plate 36, the high-pressure water forms a uniformly distributed circumferential static pressure within the osmotic pressure simulation chamber 34. This static pressure is transmitted to the outer wall of the slurry sample through the flexible isolation sleeve 32, thus achieving the transformation from formation pore water pressure to component circumferential water pressure. The mechanical equivalent transformation of the force on the slurry is achieved, and the water pressure in the osmotic pressure simulation chamber 34 is monitored in real time by a high-precision pressure sensor. The signal is fed back to the control system, which adjusts the water injection system to maintain a constant set pressure and observes the slurry completing the solidification and hardening process under the continuous action of osmotic pressure. The incompressibility of water is used to form a uniform static pressure field of high-pressure water in the osmotic pressure simulation chamber 34. The pressure is transmitted to the slurry sample through the flexible isolation sleeve 32. The pressure distribution and direction of action are completely consistent with the osmotic pressure of the formation on site, which solves the core problem of the disconnect between the working conditions of the existing test equipment.

[0038] The top of the end cap 33 is fixedly connected to an inlet valve and an exhaust valve. The inlet valve is connected to the outlet pipe of the test tank 21 via a quick-release connector. The exhaust valves correspond to the osmotic pressure simulation chamber 34 and the slurry forming chamber 35, respectively. The rear sides of the three high-strength observation shells 31 are connected by a tee pipe 9 via a quick-release connector, and the other end of the tee pipe 9 is connected to a plunger metering pump. The coordinated design of the inlet valve and the exhaust valve ensures that the slurry is filled without air bubbles. The exhaust valve is located at the highest point of the forming chamber, which can completely expel the air replaced during the injection process, avoiding the influence of residual air bubbles on the strength and impermeability of the specimen. Furthermore, the three osmotic pressure simulation chambers 34 are connected in parallel through the tee pipe 9, realizing the synchronous forming of multiple specimens under the same osmotic pressure conditions. This facilitates parallel comparison tests, eliminates the influence of pressure differences between batches on the test results, and improves the statistical reliability of the test data.

[0039] Both the high-strength observation shell 31 and the flexible isolation sleeve 32 are provided with sealing protrusions 10 on their tops, and the surface of the sealing protrusions 10 is in close contact with the inner wall of the end cap 33. The interior of the flexible isolation sleeve 32 is filled with several annular skeletons 11. The high-strength observation shell 31 and the sealing protrusions 10 on the top of the flexible isolation sleeve 32 form a double seal, ensuring reliable sealing effect and no leakage under high pressure osmotic pressure environment. This avoids simulation distortion caused by pressure loss, ensures the accuracy of formation osmotic pressure simulation, and provides a real stress environment for trial fitting. The annular skeletons 11 provide structural support for the flexible isolation sleeve 32, which not only ensures the shape stability of the isolation sleeve under high pressure and makes the pressure transmission path clear and controllable, but also does not affect the uniform pressure transmission characteristics.

[0040] The working principle of this embodiment is as follows: The operator sets the target osmotic pressure value through the control system and prepares three high-strength observation shells 31 for specimen molding. The control system sends a grouting command to the material mixing mechanism 2. The mixed and homogenized grout is transported to the quick-release joint through the outlet pipe of the mixing tank 21 and injected into the grout molding chamber 35 through the inlet valve. During the grouting process, the air in the molding chamber is discharged from the exhaust valve located at the highest point. When grout continuously flows out of the exhaust valve, it indicates that the molding chamber is completely filled. The operator closes the inlet valve and the exhaust valve to keep the molding chamber in a sealed state. After the grout injection is completed, The control system starts the plunger metering pump connected to the three-way pipe 9, simultaneously injecting high-pressure water into the three osmotic pressure simulation chambers 34 of the high-strength observation shell 31. After entering the osmotic pressure simulation chambers 34, the high-pressure water flows through the stacked porous water distribution plates 36, which uniformly distribute the high-pressure water within the chambers, forming a uniform circumferential static pressure field. High-precision pressure sensors within the osmotic pressure simulation chambers 34 monitor the water pressure in real time and feed the signal back to the control system. The control system compares the measured pressure with the set value and adjusts the injection flow rate of the plunger metering pump to ensure the osmotic pressure simulation chambers 34... The internal pressure is precisely stabilized at the set value; the circumferential static pressure formed by the high-pressure water acts on the outer wall of the flexible isolation sleeve 32, which is made of highly elastic alkali-resistant rubber. Under pressure, it evenly transmits the water pressure to the slurry sample in the inner slurry forming chamber 35. The annular skeleton 11 inside the flexible isolation sleeve 32 provides radial support for the isolation sleeve, preventing it from deforming excessively under high pressure, while ensuring the uniformity of pressure transmission. Throughout the entire process of slurry coagulation and hardening, the pressure in the osmotic pressure simulation chamber 34 is continuously monitored and controlled by the control system, ensuring that the slurry sample is always under the set osmotic pressure. In this system, the three parallel osmotic pressure simulation chambers 34 are connected by a three-way pipe 9, ensuring that the internal pressure of the three specimens remains consistent. This ensures that the three specimens are formed synchronously under the same formation osmotic pressure environment. After the specimens reach the preset setting time, the control system stops the plunger metering pump, opens the drain valve to slowly release the osmotic pressure, disassembles each high-strength observation shell 31, and demolds the specimens to obtain grouting specimens formed under simulated formation osmotic pressure environment. The grouting specimens are used for subsequent performance testing, and the front-end grouting material mixing parameters are adjusted according to the formation osmotic pressure simulation results and subsequent performance test data.

[0041] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. Those skilled in the art can make modifications to this embodiment without contributing any inventive step after reading this specification. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-liquid composite grouting material trial preparation device based on field testing, comprising a support frame (1), characterized in that: The material preparation mechanism (2) is bolted inside the support frame (1), and a liquid storage tank (4) is bolted to the top of the support frame (1). The liquid storage tank (4) has three storage chambers inside, and each liquid storage chamber is connected to the material preparation mechanism (2) through a servo metering pump and a flow sensor. The material mixing mechanism (2) includes a mixing tank (21). The interior of the mixing tank (21) is provided with a premixing chamber (27), a main mixing chamber (28) and a homogenizing chamber (29) from top to bottom. The interior of the premixing chamber (27) has three opposing nozzles (22) arranged circumferentially. An adjustable throttling component (23) is bolted between the outer sides of the three opposing nozzles (22). The other end of the opposing nozzles (22) is connected to the corresponding liquid storage chamber through a pipeline. The interior of the mixing tank (21) is rotatably connected to a rotating shaft (24). The bottom end of the surface of the rotating shaft (24) is fitted with a homogenizing component (25), and the top end of the surface of the rotating shaft (24) is fixedly welded with a double-layer spiral stirring blade (26). The double-layer spiral stirring blade (26) and the homogenizing component (25) are located inside the main mixing chamber (28) and the homogenizing chamber (29), respectively.

2. The three-liquid composite grouting material trial preparation device based on field testing according to claim 1, characterized in that: The top of the rotating shaft (24) is bolted with a transmission box (5), and the right side of the transmission box (5) is bolted with an input shaft (6). The other end of the input shaft (6) extends to the outside of the test tank (21) and is bolted with a variable frequency motor. The inside of the liquid storage tank (4) is rotatably connected with a rotating shaft (7), and several stirring blades (8) are fixedly mounted on the surface of the rotating shaft (7). Two adjacent stirring blades (8) are set as a group and are located inside the corresponding liquid storage chamber.

3. The three-liquid composite grouting material trial preparation device based on field testing according to claim 1, characterized in that: The test mixing tank (21) has a double-layer structure. The outer layer is an electric heating insulation jacket, and the inner layer is a mixing chamber. Temperature sensors are provided inside both the jacket and the mixing chamber, and electric heating wires are provided inside the jacket.

4. The three-liquid composite grouting material trial preparation device based on field testing according to claim 1, characterized in that: The outlet of the test tank (21) is equipped with a pressure regulating valve and a booster pump. The inlets of the pressure regulating valve and the booster pump are connected to the homogenization chamber (29), and the homogenization chamber (29) is equipped with a viscosity detection probe.

5. The three-liquid composite grouting material trial preparation device based on field testing according to claim 1, characterized in that: The homogenization component (25) includes a follower ring (251), which is fixedly sleeved on the bottom end of the surface of the rotating shaft (24). Three homogenization perforated plates (252) are provided on the top of the follower ring (251). The three homogenization perforated plates (252) are stacked and movably sleeved on the surface of the rotating shaft (24). Two support plates (253) are rotatably sleeved on the surface of the rotating shaft (24). A support rod (254) slides through the interior of each support plate (253) in an annular shape. One end of each support rod (254) is welded to the top and bottom homogenization perforated plates (252) respectively. A spring (255) is sleeved on the surface. The two ends of the top spring (255) are respectively bolted to the top homogenizing plate (252) and the top support plate (253). The two ends of the bottom spring (255) are respectively bolted to the bottom homogenizing plate (252) and the bottom support plate (253). The homogenizing hole of the homogenizing plate (252) is provided with a disturbance element (256). The bottom of the bottom homogenizing plate (252) is welded with several push columns (257) in an annular shape. The top of the follower ring (251) is welded with several push blocks (258) in an annular shape. The push blocks (258) are used in conjunction with the push columns (257).

6. The three-liquid composite grouting material trial preparation device based on field testing according to claim 5, characterized in that: The disturbance component (256) includes a shaft (256a), and three fixing brackets (256b) are fixedly sleeved on the surface of the shaft (256a). Both ends of the fixing brackets (256b) are welded to the inner wall of the homogenization hole of each homogenization plate (252). Several bushings (256c) are rotatably sleeved on the surface of the shaft (256a), and several arc-shaped disturbance plates (256d) are annularly welded on the surface of the bushings (256c). The bushings (256c) and the disturbance plates are located in the homogenization hole of each homogenization plate (252).

7. The three-liquid composite grouting material trial preparation device based on field testing according to claim 1, characterized in that: The adjustable throttling assembly (23) includes a fixed ring (231), with an end face toothed ring (232) rotatably connected to the bottom of the fixed ring (231). A drive gear (233) is rotatably connected to the top of the fixed ring (231) via a mounting bracket, and the drive gear (233) meshes with the end face toothed ring (232). Three connecting pipes (234) are circumferentially distributed inside the fixed ring (231), and the three connecting pipes (234) are fixed to the corresponding oriented nozzles (22). The three connecting pipes (234) are connected, and the other end of each connecting pipe (234) is connected to the corresponding liquid storage chamber. The connecting pipe (234) has two liquid outlet plates (235) welded inside. A throttling orifice plate (236) is rotatably connected between the two liquid outlet plates (235). A follower toothed ring (237) is welded to the surface of the throttling orifice plate (236). A sealing structure is provided at the connection between the follower toothed ring (237) and the connecting pipe (234). The follower toothed ring (237) meshes with the end face toothed ring (232).

8. The three-liquid composite grouting material trial preparation device based on field testing according to claim 1, characterized in that: The material testing and mixing mechanism (2) also includes a formation osmotic pressure simulation component (3). The formation osmotic pressure simulation component (3) includes three horizontally arranged high-strength observation shells (31). The interior of the high-strength observation shells (31) is provided with a flexible isolation sleeve (32) made of high-elasticity alkali-resistant rubber. The top of the high-strength observation shells (31) is bolted with an end cap (33). The flexible isolation sleeve (32) divides the interior of the high-strength observation shells (31) into an osmotic pressure simulation chamber (34) and a slurry forming chamber (35). The interior of the high-strength observation shells (31) is bolted with several porous water distribution plates (36) arranged in a stacked manner. The porous water distribution plates (36) are located inside the osmotic pressure simulation chamber (34). The interior of the osmotic pressure simulation chamber (34) is provided with a high-precision pressure sensor.

9. The three-liquid composite grouting material trial preparation device based on field testing according to claim 8, characterized in that: The top of the end cap (33) is fixedly connected to the liquid inlet valve and the vent valve. The liquid inlet valve is connected to the outlet pipeline of the test tank (21) through a quick-release connector. The vent valves correspond to the osmotic pressure simulation chamber (34) and the slurry forming chamber (35) respectively. The rear sides of the three high-strength observation shells (31) are connected by a three-way pipe (9) through a quick-release connector, and the other end of the three-way pipe (9) is connected to a plunger metering pump.

10. The three-liquid composite grouting material trial preparation device based on field testing according to claim 8, characterized in that: The top of both the high-strength observation shell (31) and the flexible isolation sleeve (32) are provided with sealing protrusions (10), and the surface of the sealing protrusions (10) is in close contact with the inner wall of the end cap (33). The interior of the flexible isolation sleeve (32) is filled with several annular skeletons (11).

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