An intelligent triaxial compaction grouting test device and test method

Abstract

The present invention relates to an intelligent triaxial compaction grouting test device, comprising a grouting system (1), a simulation system (2) and a PIV system (3) that cooperate with each other; the grouting system (1) comprises a pressure supply component, a control component (12) and a slurry storage component (13); the simulation system (2) comprises a displacement sensor measuring device (21), a loading frame (22), a pressure chamber (23), a confining pressure volume controller (24), a pollutant treatment chamber (25) and a back pressure volume controller (26); the PIV system (3) comprises a pulse light source (32) arranged on an optical platform (31), a CCD camera (33) and a data processor (34). The present invention has the advantages of accurately controlling key parameters such as grouting amount and grouting pressure, realizing intelligent technology and real-time control for effective control of the grouting construction process, simulating the stress state of the deep environment, ensuring the uniformity and uniformity of the sample, strong operability and high test efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of triaxial grouting equipment, in particular to an intelligent triaxial compaction grouting test device and a test method. Background Art

[0002] The diffusion of slurry is an important factor affecting the effect of soil reinforcement and an important prerequisite for analyzing the reinforcement mechanism. The effect of slurry on soil after injection is a very complex interaction process. At present, according to different soil injection conditions, the effect of slurry on soil after injection is mainly divided into penetration, compaction, splitting and other modes, and all of them consider the slurry-soil relationship under ideal conditions. In the actual grouting process of soil, multiple types of diffusion modes may coexist or transform into each other.

[0003] Since post-grouting technology is applied to underground concealed projects, the grouting flow and diffusion process, grouting reinforcement range, and the shape of cement soil reinforcement after grouting cannot be effectively obtained. The current test methods cannot simulate deep soil grouting, and it is difficult to intuitively analyze the flow and diffusion law of cement grout between piles and soil. Therefore, there is an urgent need for a test device that can simulate deep soil grouting and intuitively monitor the flow and diffusion law of grouting, and design a triaxial instrument and method that can perform compaction grouting tests. Summary of the invention

[0004] The purpose of the present invention is to solve the problems that the existing deep soil grouting cannot be simulated, the slurry flow and diffusion laws cannot be monitored, and the grouting construction process cannot be effectively controlled. An intelligent triaxial instrument compaction grouting test device is provided, which can accurately control key parameters such as grouting volume and grouting pressure, realize intelligent technology and real-time management and control for effective control of the grouting construction process, simulate the stress state of the deep environment, and ensure the uniformity and uniformity of the sample at the same time. The test method has strong operability and high test efficiency.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An intelligent triaxial compaction grouting test device includes a grouting system, a simulation system and a PIV system that cooperate with each other. The grouting system includes a pressure supply component, a control component and a slurry storage component. The pressure supply component includes an air compressor, the control component includes a precision pressure regulating valve, a communication electronic scale, a voltage-stabilized power supply, a control panel, an electromagnetic relay, a control valve, a solenoid valve and a pressure gauge. The slurry storage component includes a slurry storage tank, a mixer and a liquid level display.

[0007] The air compressor is connected to the slurry storage tank through a pipeline 1. The slurry storage tank is arranged on a communication electronic scale and is connected with a vertical mixer. A liquid level display is also arranged on the side of the slurry storage tank to observe the slurry volume in the slurry storage tank.

[0008] The top of the slurry storage tank is connected to the simulation system through pipeline 2, and a control valve, a solenoid valve and a pressure gauge are arranged on pipeline 2 in sequence. The solenoid valve is connected to a voltage-stabilized power supply through a voltage-stabilized circuit, and the voltage-stabilized power supply is connected to an electromagnetic relay and a control board in sequence. The control board is electrically connected to a communication electronic scale, and the electromagnetic relay is connected to the electromagnetic valve through a circuit to automatically control the stable grouting pressure.

[0009] The simulation system includes a displacement sensor measuring device, a loading frame, a pressure chamber, a confining pressure volume controller, a pollutant treatment chamber and a back pressure volume controller. The pressure chamber is arranged in the loading frame. The lower part of the loading frame is connected to the matching displacement sensor measuring device. A central rod is connected to the loading frame. The central rod extends downward into the inner cavity of the pressure chamber and is connected to the sample cap. The axes of the central rod and the pressure chamber coincide with each other. A permeable stone is connected below the sample cap to facilitate the injection of water slurry.

[0010] The upper part of the sample cap is connected with a grouting pipe, which passes through the outside of the pressure chamber and is connected with the second pipe of the grouting system. A drainage pipe is also provided at the bottom of the pressure chamber cavity.

[0011] One side of the pressure chamber is connected to the confining pressure volume controller through a confining pressure pipe, the upper part of the sample cap is connected to the lower loading chamber of the pollutant treatment chamber through a back pressure pipe, and the upper loading chamber of the pollutant treatment chamber is connected to the back pressure volume controller through a pipeline;

[0012] There is also an exhaust hole on the top of the pressure chamber to exhaust the bubbles in the pressure chamber, making it close to a vacuum state and reducing the error of sample volume change.

[0013] The PIV system includes a pulse light source, a CCD camera and a data processor arranged on an optical platform. The pulse light source is arranged facing one side of the inner cavity of the pressure chamber, and the CCD camera is arranged facing the front of the pressure chamber. The CCD camera is connected to the data processor through a signal transmission line to transmit the collected data information to the processor for analysis and processing.

[0014] Furthermore, the side wall of the slurry storage tank is made of transparent organic glass to facilitate observation of slurry diffusion.

[0015] Furthermore, the pressure chamber is a cylindrical structure, the main body of which is made of aluminum alloy, and the center rod is made of stainless steel.

[0016] Furthermore, the grouting pipe is a thin-walled hose, so that it can be built into the interior of the sample after the grouting is completed, and has little effect on the compression and shearing properties of the sample during the shearing process.

[0017] In order to further achieve the purpose of the present invention, an intelligent triaxial instrument compaction grouting test method is also provided, and the specific steps are as follows, including:

[0018] (1) Prepare soil samples according to the principles of triaxial test soil sample preparation, place the soil samples on the base of the pressure chamber, and prepare for grouting;

[0019] (2) Turn on the air compressor to provide pressure to the grout storage tank and stabilize the grouting pressure through the precision pressure regulating valve;

[0020] (3) The control valve is opened, the slurry is discharged from the slurry storage tank, the PIV system is started, the solenoid valve is kept open for continuous grouting, and grouting begins. The slurry is injected into the pressure chamber through the grouting pipe;

[0021] (4) The pulp storage tank is placed on a communication electronic scale, which is connected to a control board and an electromagnetic relay to provide data to the control board through the weight change of the pulp storage tank;

[0022] (5) When the specified grouting volume is not reached, no signal is given, the electromagnetic relay is powered off, the electromagnetic valve remains normally open, and grouting continues until the specified grouting volume is reached. The grouting process is monitored in real time and the entire grouting process is recorded. The control component monitors, collects, records, and transmits the pressure, flow rate, and grouting time during grouting;

[0023] (6) When the specified grouting volume is reached, a power-on signal is given, the electromagnetic relay energizes the solenoid valve, the solenoid valve closes, and the grouting ends. At this time, the PIV system is turned off and its data is transmitted to the cloud for analysis;

[0024] (7) After the grouting of the sample soil is completed, the pressure chamber is placed on the triaxial test frame for triaxial testing after standing for 15 days.

[0025] Furthermore, in step (3), when grouting begins, the PIV system is started, and light wave particles are emitted by a pulsed light source to directly hit the soil sample. The CCD camera captures the image of the flowing particles and uploads it to the data processor, which can intuitively reflect the flow and diffusion law of the cement slurry in the soil.

[0026] Furthermore, the pollutant treatment chamber is placed between the pressure chamber and the back pressure volume controller, and its upper loading chamber applies water pressure, which acts on the lower loading chamber, squeezing the liquid inside it to apply pressure to the sample in the pressure chamber, and the volume change of the sample in the test and the displacement of the sample under the stress state are measured by the change in the volume of the liquid inside the lower loading chamber.

[0027] Furthermore, in the step (1), after the soil sample is installed, air-free water is injected into the inner cavity of the pressure chamber, and the bubbles in the inner cavity of the pressure chamber are discharged through the exhaust hole of the pressure chamber to make it close to a vacuum state, thereby reducing the error of sample volume change.

[0028] Furthermore, in step (7), when the number of samples is large, an admixture is added to the cement slurry, and after standing for 7 to 10 days, the pressure chamber can be placed on a triaxial test frame for triaxial testing.

[0029] Furthermore, in the step (7), the admixture added to the cement slurry is an early strength agent.

[0030] Compared with the prior art, the specific advantages of the technical solution of the present invention are:

[0031] (1) The equipment of the present invention can improve the grouting device in an intelligent and automated manner, thereby effectively controlling the grouting parameters, realizing intelligent technology and real-time control of the post-grouting construction process, improving the stability of grouting, thereby improving the stability and reliability of the entire test, and further contributing to the study of the strength and stress-strain law of soil samples at different water-cement ratios and ages in the soil samples, and analyzing the factors and change laws that affect the mechanical properties of soil samples after grouting;

[0032] (2) By modifying the pressure chamber, the specimens are grouted in the pressure chamber under a simulated triaxial environment. After the slurry is allowed to diffuse after 15 days of standing, the pressure chamber can be directly placed on the triaxial instrument for triaxial testing, which is convenient for operation and reduces the test time.

[0033] (3) PIV digital imaging technology can be used to visualize the entire grouting process, and intuitively study the flow and diffusion of cement slurry between soil layers, providing a reference for revealing the cement soil reinforcement molding and penetration mechanism, as well as the establishment of the intrinsic relationship between the reinforcement effect and the enhancement of soil strength;

[0034] (4) The device of the present invention can effectively isolate the waste generated by grouting, thereby reducing the cost of the test equipment and increasing the service life of the test equipment;

[0035] (5) Grouting samples simulating deep environments can be prepared in batches, which can effectively ensure the uniformity and uniformity of the samples;

[0036] (6) The sample preparation of the present invention is completed in the pressure chamber, and the test is carried out uniformly after batch preparation, which improves the test efficiency, has strong operability, is conducive to the sustainable development of the test, is conducive to the diffusion law and reinforcement mechanism of the slurry under different confining pressure conditions, and provides guidance for engineering practice. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the grouting system of the present invention;

[0038] Figure 2 It is a structural schematic diagram of the simulation system of the present invention;

[0039] Figure 3 It is a schematic diagram of the structure of the PIV system of the present invention;

[0040] Figure 4 is an internal structural diagram of the pressure chamber of the present invention;

[0041] Figure 5 It is the working flow chart of the grouting system of the present invention. DETAILED DESCRIPTION

[0042] Example 1

[0043] To make the present invention more clear, an intelligent triaxial compaction grouting test device and a test method of the present invention are further described below in conjunction with the accompanying drawings. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] See also Figure 1 , Figure 2 and Figure 3 , an intelligent triaxial compaction grouting test device, characterized in that:

[0045] It includes a grouting system 1, a simulation system 2 and a PIV system 3 that cooperate with each other;

[0046] See also Figure 1 The grouting system 1 includes a pressure supply component, a control component 12 and a slurry storage component 13. The pressure supply component includes an air compressor 11. The control component 12 includes a precision pressure regulating valve 121, a communication electronic scale 122, a voltage-stabilized power supply 123, a control board 124, an electromagnetic relay 125, a control valve 126, a solenoid valve 127 and a pressure gauge 128. The slurry storage component 13 includes a slurry storage tank 131, a mixer 132 and a liquid level display 133.

[0047] The air compressor 11 is connected to the slurry storage tank 131 through a pipe 14. The slurry storage tank 131 is arranged on the communication electronic scale 122 and is connected with a vertical mixer 132. The side wall of the slurry storage tank 131 is made of transparent organic glass, and a liquid level display 133 is also arranged on the side thereof to facilitate observation of the slurry diffusion and the slurry capacity in the slurry storage tank.

[0048] The top of the slurry storage tank 131 is connected to the simulation system 2 through the pipeline 15. The pipeline 15 is provided with a control valve 126, a solenoid valve 127 and a pressure gauge 128 in sequence. The solenoid valve 127 is connected to the voltage-stabilized power supply 123 through a voltage-stabilized circuit. The voltage-stabilized power supply 123 is connected to the electromagnetic relay 125 and the control board 124 in sequence. The control board 124 is electrically connected to the communication electronic scale 122. The electromagnetic relay 125 is connected to the electromagnetic valve 127 through a circuit to automatically control the stable grouting pressure.

[0049] See also Figure 2 and Figure 4The simulation system 2 includes a displacement sensor measuring device 21, a loading frame 22, a pressure chamber 23, a confining pressure volume controller 24, a pollutant treatment chamber 25 and a back pressure volume controller 26. The pressure chamber 23 is arranged in the loading frame 22. The lower part of the loading frame 22 is connected to the matching displacement sensor measuring device 21. A central rod 231 is connected to the loading frame 22. The central rod 231 extends downward into the inner cavity of the pressure chamber 23 and is connected to the sample cap 232. The axes of the central rod 231 and the pressure chamber 23 coincide with each other. A permeable stone 233 is connected below the sample cap 232 to facilitate the injection of water slurry.

[0050] The upper part of the sample cap 232 is connected with a grouting pipe 234, which passes through the pressure chamber 23 and is connected with the pipe 2 15 of the grouting system 1. A drainage pipe 235 is also provided at the bottom of the inner cavity of the pressure chamber 23;

[0051] The pressure chamber 23 is a cylindrical structure, the main body of which is made of aluminum alloy, the center rod 231 is made of stainless steel, and the grouting pipe 234 is a thin-walled hose, so that it can be built into the inside of the sample after the grouting is completed, and has little effect on the compression and shearing properties of the sample during the shearing process;

[0052] One side of the pressure chamber 23 is connected to the confining pressure volume controller 24 through the confining pressure pipe 236, the upper part of the sample cap 232 is connected to the lower loading chamber of the pollutant treatment chamber 25 through the back pressure pipe 237, and the upper loading chamber of the pollutant treatment chamber 25 is connected to the back pressure volume controller 26 through a pipeline;

[0053] The top of the pressure chamber 23 is also provided with an exhaust hole 238 to exhaust the bubbles in the inner cavity of the pressure chamber, making it close to a vacuum state and reducing the error of the sample volume change;

[0054] See also Figure 3 The PIV system 3 includes a pulse light source 32, a CCD camera 33 and a data processor 34 arranged on an optical platform 31. The pulse light source 32 is arranged facing the inner cavity side of the pressure chamber 23, and the CCD camera 33 is arranged facing the front of the pressure chamber 23. The CCD camera 33 is connected to the data processor 34 through a signal transmission line to transmit the collected data information to the processor for analysis and processing.

[0055] See also Figure 5 The intelligent triaxial compaction grouting test method is carried out using the above device. The specific steps are as follows, which are characterized by comprising:

[0056] (1) Prepare soil samples according to the principles of preparing soil samples for triaxial tests, place the soil samples on the base of the pressure chamber 23, and prepare for grouting;

[0057] (2) Turn on the air compressor 11 to provide pressure to the grout storage tank 131, and stabilize the grouting pressure through the precision pressure regulating valve 121;

[0058] (3) The control valve 126 is opened, the slurry storage tank 131 is discharged, the PIV system 3 is started, the solenoid valve 127 is kept open for continuous grouting, and the grouting begins. The slurry is injected into the pressure chamber 23 through the grouting pipe 234;

[0059] (4) The pulp storage tank 131 is placed on the communication electronic scale 122, and the communication electronic scale 122 is connected to the control board 124 and the electromagnetic relay 125, and provides data to the control board 124 through the weight change of the pulp storage tank 131;

[0060] (5) When the specified grouting volume is not reached, no signal is given, the electromagnetic relay 125 is powered off, the electromagnetic valve 127 remains normally open, and the grouting continues until the specified grouting volume is reached. The grouting process is monitored in real time and the entire grouting process is recorded. The control component 12 monitors, collects, records, and transmits the pressure, flow rate, and grouting time during the grouting process;

[0061] (6) When the specified grouting volume is reached, a power-on signal is given, the electromagnetic relay 125 energizes the electromagnetic valve 127, the electromagnetic valve 127 is closed, and the grouting is completed. At this time, the PIV system 3 is turned off, and its data is transmitted to the cloud for analysis;

[0062] (7) After the grouting of the sample soil is completed, the pressure chamber 23 is placed on the triaxial test frame for triaxial test after standing for 15 days. When the number of samples is large, admixtures such as drought-hardening agents are added to the cement slurry. After standing for 7 to 10 days, the pressure chamber can be placed on the triaxial test frame for triaxial test.

[0063] In this embodiment, when grouting begins, the PIV system 3 is started, and the pulse light source 32 emits light wave particles directly onto the soil sample. The CCD camera 33 captures the flow particle image and uploads it to the data processor 34, which can intuitively reflect the flow and diffusion law of cement slurry in the soil.

[0064] In this embodiment, the pollutant treatment chamber 25 is placed between the pressure chamber 23 and the back pressure volume controller 26. The upper loading chamber applies water pressure, and the water pressure acts on the lower loading chamber, squeezing the liquid inside it to apply pressure to the sample in the pressure chamber 23, and the volume change of the sample in the test and the displacement of the sample under the stress state are measured by the change in the volume of the liquid inside the lower loading chamber.

[0065] In this embodiment, after the soil sample is installed, air-free water can be injected into the inner cavity of the pressure chamber 23, and the bubbles in the inner cavity of the pressure chamber 23 can be discharged through the exhaust hole 238 of the pressure chamber to make it close to a vacuum state, thereby reducing the error of sample volume change.

[0066] The present invention transforms the pressure chamber and can be used for sample grouting. After the grouting is allowed to stand, a triaxial test is performed to simulate the stress state of a deep environment by controlling the confining pressure. At the same time, grouting samples simulating a deep environment can be prepared in batches, which can effectively ensure the uniformity and uniformity of the samples, and the grouting device can be improved in an intelligent and automated manner, thereby effectively controlling the grouting parameters to realize intelligent technology and real-time control over the post-grouting construction process. PIV digital imaging technology can be used to carry out visualization tests of the entire post-grouting process, and the flow and diffusion laws of cement slurry between soil layers can be intuitively studied, providing a reference basis for revealing the reinforcement molding and penetration mechanism of cement soil and the establishment of the intrinsic relationship between the reinforcement effect and the enhanced strength of the soil body. The equipment of the present invention is simple, reliable, and has a low test time cost.

[0067] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. An intelligent triaxial compaction grouting test device, characterized in that: It includes a grouting system (1), a simulation system (2) and a PIV system (3) that cooperate with each other; The grouting system (1) comprises a pressure supply component, a control component (12) and a slurry storage component (13); the pressure supply component comprises an air compressor (11); the control component (12) comprises a precision pressure regulating valve (121), a communication electronic scale (122), a voltage-stabilized power supply (123), a control panel (124), an electromagnetic relay (125), a control valve (126), an electromagnetic valve (127) and a pressure gauge (128); and the slurry storage component (13) comprises a slurry storage tank (131), a mixer (132) and a liquid level display (133); The air compressor (11) is connected to a pulp storage tank (131) via a pipe 1 (14). The pulp storage tank (131) is disposed on a communication electronic scale (122) and is internally connected to a vertical mixer (132). A liquid level display (133) is also provided on the side of the pulp storage tank (131). The top of the slurry storage tank (131) is connected to the simulation system (2) via a second pipeline (15). A control valve (126), a solenoid valve (127) and a pressure gauge (128) are provided on the second pipeline (15) in sequence. The solenoid valve (127) is connected to a voltage-stabilizing power supply (123) via a voltage-stabilizing circuit. The voltage-stabilizing power supply (123) is connected to an electromagnetic relay (125) and a control board (124) in sequence. The control board (124) is electrically connected to a communication electronic scale (122). The electromagnetic relay (125) is connected to the electromagnetic valve (127) via a circuit. The simulation system (2) comprises a displacement sensor measuring device (21), a loading frame (22), a pressure chamber (23), a confining pressure volume controller (24), a pollutant treatment chamber (25) and a back pressure volume controller (26); the pressure chamber (23) is arranged in the loading frame (22); the lower part of the loading frame (22) is connected to the matching displacement sensor measuring device (21); a central rod (231) is connected to the loading frame (22); the central rod (231) extends downward into the inner cavity of the pressure chamber (23) and is connected to a sample cap (232); the axes of the central rod (231) and the pressure chamber (23) coincide with each other; and a permeable stone (233) is connected below the sample cap (232); The upper part of the sample cap (232) is connected to a grouting pipe (234), the grouting pipe (234) passes through the pressure chamber (23) and is connected to the second pipe (15) of the grouting system (1), and a drainage pipe (235) is also provided at the bottom of the inner cavity of the pressure chamber (23); One side of the pressure chamber (23) is connected to the confining pressure volume controller (24) via a confining pressure pipe (236), the upper part of the sample cap (232) is connected to the lower loading chamber of the pollutant treatment chamber (25) via a back pressure pipe (237), and the upper loading chamber of the pollutant treatment chamber (25) is further connected to the back pressure volume controller (26) via a pipeline; The top of the pressure chamber (23) is also provided with an exhaust hole (238); The PIV system (3) comprises a pulse light source (32), a CCD camera (33) and a data processor (34) arranged on an optical platform (31), wherein the pulse light source (32) is arranged facing one side of the inner cavity of the pressure chamber (23), the CCD camera (33) is arranged facing the front of the pressure chamber (23), and the CCD camera (33) is connected to the data processor (34) via a signal transmission line.

2. The intelligent triaxial compaction grouting test device according to claim 1 is characterized in that: The side wall of the slurry storage tank (131) is made of transparent organic glass.

3. The intelligent triaxial compaction grouting test device according to claim 1 or 2, characterized in that: The pressure chamber (23) is a cylindrical structure, the main body of which is made of aluminum alloy, and the center rod (231) is made of stainless steel.

4. The intelligent triaxial compaction grouting test device according to claim 1 or 2, characterized in that: The grouting pipe (234) is a thin-walled hose.

5. A method for performing intelligent triaxial grouting test using the device as claimed in claim 1, wherein the specific steps are as follows, characterized in that: include: Step 1: Prepare a soil sample according to the principle of preparing soil samples for triaxial test, place the soil sample on the base of the pressure chamber (23), and prepare for grouting; Step 2: Turn on the air compressor (11) to provide pressure to the grout storage tank (131), and stabilize the grouting pressure through the precision pressure regulating valve (121); Step 3: the control valve (126) is opened, the slurry is discharged from the slurry storage tank (131), the PIV system (3) is started, the solenoid valve (127) is kept open for continuous grouting, and grouting begins. The slurry is injected into the pressure chamber (23) through the grouting pipe (234); Step 4: placing the pulp storage tank (131) on the communication electronic scale (122), the communication electronic scale (122) is connected to the control board (124) and the electromagnetic relay (125), and provides data to the control board (124) through the weight change of the pulp storage tank (131); Step 5: When the designated grouting volume is not reached, no signal is given, the electromagnetic relay (125) is powered off, the electromagnetic valve (127) remains normally open, and the grouting continues until the designated grouting volume is reached. The grouting process is monitored in real time and the entire grouting process is recorded. The control component (12) monitors, collects, records, and transmits the pressure, flow rate, and grouting time during the grouting process. Step 6: When the specified grouting volume is reached, a power-on signal is given, the electromagnetic relay (125) energizes the electromagnetic valve (127), the electromagnetic valve (127) is closed, and the grouting is completed. At this time, the PIV system (3) is closed, and its data is transmitted to the cloud for analysis; Step 7: After the grouting of the sample soil is completed and the sample soil is left to stand for 15 days, the pressure chamber (23) is placed on a triaxial test frame for a triaxial test.

6. The intelligent triaxial compaction grouting test device according to claim 5 is characterized in that: In step three, when grouting begins, the PIV system (3) is started, and light wave particles are emitted by the pulse light source (32) to directly hit the soil sample. The CCD camera (33) captures the flow particle image and uploads it to the data processor (34), which can intuitively reflect the flow and diffusion law of cement slurry in the soil.

7. The intelligent triaxial compaction grouting test device according to claim 5 is characterized by: The pollutant treatment chamber (25) is placed between the pressure chamber (23) and the back pressure volume controller (26), and its upper loading chamber applies water pressure, which acts on the lower loading chamber, squeezing the liquid inside the chamber to apply pressure to the sample in the pressure chamber (23), and the volume change of the sample in the test and the displacement of the sample under stress are measured through the change in the volume of the liquid inside the lower loading chamber.

8. The intelligent triaxial compaction grouting test device according to claim 5 is characterized by: In the step 1, after the soil sample is installed, air-free water is injected into the inner cavity of the pressure chamber (23), and bubbles in the inner cavity of the pressure chamber (23) are discharged through the exhaust hole (238) of the pressure chamber (23), so that the pressure chamber is close to a vacuum state, thereby reducing the error of sample volume change.

9. The intelligent triaxial compaction grouting test device according to claim 5 is characterized by: In step seven, when the number of samples is large, an admixture is added to the cement slurry, and after standing for 7 to 10 days, the pressure chamber (23) can be placed on a triaxial test frame for triaxial testing.

10. The intelligent triaxial compaction grouting test device according to claim 9 is characterized in that: In the step seven, the admixture added to the cement slurry is an early strength agent.

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