Triaxial cyclic shearing seepage grouting integrated test device and method

Abstract

The application discloses a triaxial cyclic shearing seepage grouting integrated test device and method, which comprises a pressure chamber base, an integrated test mechanism, a cyclic dynamic load mechanism, a water pressure loading mechanism and a grouting mechanism, and symmetrically fixed pressure chamber support columns are arranged on the middle of the pressure chamber base, a confining pressure chamber is fixedly arranged above the pressure chamber support columns, a sample base is fixedly arranged at the middle of the bottom of the confining pressure chamber, a rubber protective sleeve is arranged on the sample base, a detachable pressure head is arranged in the upper end of the rubber protective sleeve, an axial pressure chamber is fixedly arranged above the confining pressure chamber, an axial pressure head is axially slidably arranged in the axial pressure chamber, the cyclic dynamic load mechanism is connected to one side of the axial pressure chamber, the water pressure loading mechanism is connected to one side of the confining pressure chamber, and the grouting mechanism is connected to the other side of the confining pressure chamber; the application can inject pressure-resistant oil into the axial pressure chamber and the confining pressure chamber through an oil tank, and can apply axial cyclic dynamic load and confining pressure through an axial pressure pump and a confining pressure pump, and the detachable pressure head and the sample base are both provided with water injection pipelines and grouting pipelines, so that integrated test can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of rock and soil property testing, and in particular to a triaxial cyclic shear seepage grouting integrated testing device and method. Background Art

[0002] The stability and deformation characteristics of rock and soil are key considerations in engineering design and construction. In order to accurately evaluate the performance of rock and soil, it is necessary to conduct multi-axial loading, seepage and grouting tests. Traditional test methods can often only test a single factor and cannot fully reflect the performance changes of rock and soil under complex stress, seepage and grouting conditions. Therefore, in view of the urgent need for research on rock and soil performance under complex geological conditions in multiple fields such as geotechnical engineering, rock mechanics and underground engineering, it is particularly important to develop an integrated test device and method that can simultaneously consider triaxial dynamic load, shear, seepage and grouting factors. Therefore, the present invention proposes a triaxial cyclic shear seepage grouting integrated test device and method to solve the problems existing in the prior art. Summary of the Invention

[0003] In response to the above problems, the purpose of the present invention is to propose a triaxial cyclic shear seepage grouting integrated test device and method. The triaxial cyclic shear seepage grouting integrated test device and method injects pressure-resistant oil into the axial pressure chamber and the confining pressure chamber through the oil tank, and uses the control system to control the axial pressure pump and the confining pressure pump to apply axial cyclic dynamic load and confining pressure. At the same time, the detachable pressure head and the sample base are provided with water injection pipelines and grouting pipelines. On the one hand, the water injection and grouting processes can be carried out simultaneously, and on the other hand, the seepage direction of the water body and slurry can be freely controlled, thereby realizing triaxial cyclic shear seepage grouting integrated test research under various conditions.

[0004] To achieve the objectives of the present invention, the present invention is implemented through the following technical solutions: a triaxial cyclic shear seepage grouting integrated test device and method, including a pressure chamber base, an integrated test mechanism, a cyclic dynamic load mechanism, a water pressure loading mechanism and a grouting mechanism, the integrated test mechanism including a pressure chamber support column, a confining pressure chamber, a sample base, a rubber protective sleeve, a detachable pressure head, an axial pressure chamber and an axial pressure head, a pressure chamber support column is symmetrically fixed in the middle of the pressure chamber base, a confining pressure chamber is fixed above the pressure chamber support column, a sample base is fixed in the middle of the bottom of the confining pressure chamber, a rubber protective sleeve is provided on the sample base, a detachable pressure head is inserted into the upper end of the rubber protective sleeve, an axial pressure chamber is fixed above the confining pressure chamber, the confining pressure chamber and the axial pressure chamber are connected, an axial pressure head is axially sliding in the axial pressure chamber, a cyclic dynamic load mechanism is connected to one side of the axial pressure chamber, a water pressure loading mechanism is connected to one side of the confining pressure chamber, and a grouting mechanism is connected to the other side of the confining pressure chamber.

[0005] A further improvement is that an axial displacement sensor is fixedly provided next to the detachable pressure head and the axial pressure head, and a rubber gasket is provided between the rubber protective sleeve, the sample base and the detachable pressure head.

[0006] A further improvement is that: the circulating dynamic load mechanism includes an upper oil inlet and outlet pipeline, a lower oil inlet and outlet pipeline, a needle valve, an oil drain tank, an axial pressure pump, a confining pressure pump and an oil filling pipeline; an upper oil inlet and outlet pipeline is connected to the upper side of the axial pressure chamber, and a lower oil inlet and outlet pipeline is connected to the lower side of the axial pressure chamber; a needle valve is fixed on the upper and lower oil inlet and outlet pipelines; an oil drain tank is connected to the ends of the upper and lower oil inlet and outlet pipelines; the oil drain tank is connected to the axial pressure pump; the oil drain tank is connected to the confining pressure pump; and an oil filling pipeline is connected between the confining pressure pump and the confining pressure chamber.

[0007] Further improvements are: the water pressure loading mechanism includes an upper water injection pipeline, a lower water injection pipeline, an upper water pressure pump, a lower water pressure pump and a water tank; the detachable pressure head is connected to the upper water injection pipeline, the sample base is connected to the lower water injection pipeline, the upper water injection pipeline is connected to the upper water pressure pump, the lower water injection pipeline is connected to the lower water pressure pump, and both the upper water pressure pump and the lower water pressure pump are connected to a water tank.

[0008] Further improvements are: the grouting mechanism includes an upper end grouting pipeline, a lower end grouting pipeline, a slurry storage tank, a grouting pump, an overflow storage tank and a grouting pump; the other side of the detachable pressure head is connected with an upper end grouting pipeline, the other side of the sample base is connected with a lower end grouting pipeline, the lower end grouting pipeline is connected with a slurry storage tank, the slurry storage tank is connected with a grouting pump, the upper end grouting pipeline is connected with an overflow storage tank, and the overflow storage tank is connected with a grouting pump.

[0009] A further improvement is that: the lower end grouting pipeline is connected to a slurry blowing pipeline, and the slurry blowing pipeline is connected to a first pressure pump.

[0010] A further improvement is that an oil blowing pipeline is provided above one side of the confining pressure chamber, and the oil blowing pipeline is connected to a second pressure pump. An oil drain pipeline is provided below the other side of the confining pressure chamber, and the oil drain pipeline is connected to an oil storage tank. The oil drain pipeline is controlled by a ball valve.

[0011] The following steps are involved:

[0012] Step 1: Sample packaging: Wrap the sample with a rubber protective cover and then place a rubber gasket between the sample base and the detachable indenter;

[0013] Step 2: Perform the axial pressure loading test. Start the axial pressure pump to fill the oil tank with pressure oil. According to the opening and closing of the needle valve, the pressure oil is filled into the axial pressure chamber through the upper inlet and outlet oil pipeline or the lower inlet and outlet oil pipeline. The hydraulic principle is used to push the axial pressure head upward or downward to realize the axial pressure test.

[0014] Step 3: Conduct confining pressure loading test, start the confining pressure pump to fill the pressure oil in the oil tank, and then fill it into the confining pressure chamber through the oil filling pipeline to apply confining pressure to achieve confining pressure test. After the test is completed, start the second pressure pump to blow oil through the oil blowing pipeline, and blow the pressure oil into the oil storage tank through the oil discharge pipeline;

[0015] Step 4: Perform a water pressure loading test, start the upper water pressure pump and the lower water pressure pump to fill the water tank with water, and then fill the sample through the upper water injection pipe and the lower water injection pipe respectively to realize the water pressure test;

[0016] Step 5: Carry out grouting test, start the grouting pump and draw the slurry in the slurry storage tank through the upper end grouting pipeline or the lower end grouting pipeline to grout the upper end or the lower end of the specimen. When drawing slurry, start the slurry pump to vacuum the overflow slurry storage tank, and draw slurry through the upper end grouting pipeline or the lower end grouting pipeline to form a grouting method that combines injection and extraction to realize the grouting test.

[0017] The beneficial effects of the present invention are as follows: the present invention injects pressure-resistant oil into the axial pressure chamber and the confining pressure chamber through the oil tank, and uses the control system to control the axial pressure pump and the confining pressure pump to apply axial cyclic dynamic load and confining pressure. At the same time, the detachable pressure head and the sample base are provided with water injection pipelines and grouting pipelines. On the one hand, the water injection and grouting processes can be carried out simultaneously, and on the other hand, the seepage direction of the water body and the slurry can be freely controlled, thereby realizing the integrated test research of triaxial cyclic shear seepage grouting under various conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall front sectional view of the present invention.

[0019] Including: 1. Pressure chamber base; 2. Pressure chamber support column; 3. Confining pressure chamber; 4. Sample base; 5. Rubber protective cover; 6. Removable pressure head; 7. Axial pressure chamber; 8. Axial pressure head; 9. Axial displacement sensor; 10. Rubber gasket; 11. Upper oil inlet and outlet pipelines; 12. Lower oil inlet and outlet pipelines; 13. Needle valve; 14. Oil drain tank; 15. Axial pressure pump; 16. Confining pressure pump; 17. Oil filling pipeline; 1 8. Upper water injection pipeline; 19. Lower water injection pipeline; 20. Upper water pressure pump; 21. Lower water pressure pump; 22. Upper grouting pipeline; 23. Lower grouting pipeline; 24. Slurry storage tank; 25. Grouting pump; 26. Overflow storage tank; 27. Slurry extraction pump; 28. Slurry blowing pipeline; 29. ​​First pressure pump; 30. Oil blowing pipeline; 31. Second pressure pump; 32. Oil discharge pipeline; 33. Oil storage tank. DETAILED DESCRIPTION

[0020] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the examples. The examples are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0021] The stability of a rock mass refers to its ability to maintain its original equilibrium under various internal and external forces. The deformation characteristics of a rock mass refer to the changes in its shape and size when subjected to external forces. Rock mass deformation includes elastic and plastic deformation. Elastic deformation refers to deformation that returns to its original shape after the external force is removed, while plastic deformation refers to deformation that does not return to its original shape after the external force is removed.

[0022] Based on this, according to Figure 1 As shown, this embodiment provides a triaxial cyclic shear seepage grouting integrated test device and method, including a pressure chamber base 1, an integrated test mechanism, a cyclic dynamic load mechanism, a water pressure loading mechanism and a grouting grouting mechanism. The integrated test mechanism includes a pressure chamber support column 2, a confining pressure chamber 3, a sample base 4, a rubber protective sleeve 5, a detachable pressure head 6, an axial pressure chamber 7 and an axial pressure head 8. A pressure chamber support column 2 is symmetrically fixed in the middle of the pressure chamber base 1, a confining pressure chamber 3 is fixed above the pressure chamber support column 2, a sample base 4 is fixed in the middle of the bottom of the confining pressure chamber 3, a rubber protective sleeve 5 is provided on the sample base 4, a detachable pressure head 6 is inserted into the upper end of the rubber protective sleeve 5, an axial pressure chamber 7 is fixed above the confining pressure chamber 3, and the confining pressure chamber 3 and the axial pressure chamber 7 are fixed. The axial pressure chamber 7 is connected to the inner chamber, and an axial pressure head 8 is provided for axial sliding in the axial pressure chamber 7. When conducting the test, the sample is placed in the confining pressure chamber 3 for convenience of confining pressure loading test. The sample base 4 and the detachable pressure head 6 are respectively in contact with the sample and connected with the grouting pipeline and the water injection pipeline for convenience of seepage and grouting test. The pressure-resistant oil is respectively injected into the upper and lower parts of the axial pressure chamber 7 to drive the axial pressure head 8 to move up and down for convenience of axial loading test, which effectively realizes the integrated triaxial cyclic shear seepage grouting test under various conditions, and solves the problem that the traditional test method can only test a single factor. A cyclic dynamic load mechanism is connected on one side of the axial pressure chamber 7, a water pressure loading mechanism is connected on one side of the confining pressure chamber 3, and a grouting and grouting mechanism is connected on the other side of the confining pressure chamber 3.

[0023] An axial displacement sensor 9 is fixedly provided next to the detachable pressure head 6 and the axial pressure head 8 to facilitate real-time sensing of the axial displacement distance of the detachable pressure head 6 and the axial pressure head 8. A rubber gasket 10 is provided between the rubber protective sleeve 5, the sample base 4 and the detachable pressure head 6, which effectively improves the sealing between the rubber protective sleeve 5, the sample base 4 and the detachable pressure head 6.

[0024] The circulating dynamic load mechanism includes an upper inlet and outlet oil pipeline 11, a lower inlet and outlet oil pipeline 12, a needle valve 13, an oil drain tank 14, an axial pressure pump 15, a confining pressure pump 16 and an oil filling pipeline 17. The upper side of the axial pressure chamber 7 is connected with an upper inlet and outlet oil pipeline 11, and the lower side of the axial pressure chamber 7 is connected with a lower inlet and outlet oil pipeline 12. A needle valve 13 is fixed on the upper inlet and outlet oil pipeline 11 and the lower inlet and outlet oil pipeline 12. The upper inlet and outlet oil pipeline 11 and the lower inlet and outlet oil pipeline 12 are matched with an oil drain tank 14. The oil drain tank 14 is connected to the axial pressure pump 15, and the oil drain tank 14 is connected to the confining pressure pump 16. The confining pressure pump 16 is connected to the confining pressure chamber 3 with an oil filling pipeline 17. When the axial loading test is carried out, the axial pressure pump 15 is started and the upper needle valve 13 is opened to open the ambassador so that the pressure oil enters the axial pressure chamber 7 through the upper inlet and outlet oil pipeline 11 to push the axial pressure head 8 down, and vice versa. The axial pressure head 8 rises.

[0025] The water pressure loading mechanism includes an upper water injection pipeline 18, a lower water injection pipeline 19, an upper water pressure pump 20, a lower water pressure pump 21 and a water tank. The detachable pressure head 6 is connected to the upper water injection pipeline 18, and the sample base 4 is connected to the lower water injection pipeline 19. The upper water injection pipeline 18 is connected to the upper water pressure pump 20, and the lower water injection pipeline 19 is connected to the lower water pressure pump 21. The upper water pressure pump 20 and the lower water pressure pump 21 are both connected to the water tank. When performing a water pressure loading test, the upper water pressure pump 20 and the lower water pressure pump 21 are started to inject water into the sample through the upper water injection pipeline 18 and the lower water injection pipeline 19 to realize the water pressure loading test.

[0026] The grouting mechanism includes an upper end grouting pipeline 22, a lower end grouting pipeline 23, a slurry storage tank 24, a grouting pump 25, an overflow storage tank 26 and a grouting pump 27. The other side of the detachable pressure head 6 is connected to the upper end grouting pipeline 22, and the lower side of the sample base 4 is connected to the lower end grouting pipeline 23. The lower end grouting pipeline 23 is connected to the slurry storage tank 24, and the slurry storage tank 24 is connected to the grouting pump 25. The upper end grouting pipeline 22 is connected to the overflow storage tank 26, and the overflow storage tank 26 is connected to the grouting pump 27.

[0027] The lower end grouting pipeline 23 is connected to a slurry blowing pipeline 28, and the slurry blowing pipeline 28 is connected to a first pressure pump 29. When cleaning is required, the first pressure pump 29 is started to blow slurry through the slurry blowing pipeline 28 for cleaning to prevent clogging of the pipeline.

[0028] An oil blowing pipeline 30 is provided above one side of the confining pressure chamber 3, and the oil blowing pipeline 30 is connected to a second pressure pump 31. An oil drain pipeline 32 is provided below the other side of the confining pressure chamber 3, and the oil drain pipeline 32 is connected to an oil storage tank 33. The oil drain pipeline 32 is controlled by a ball valve. When the confining pressure loading test is completed, the second pressure pump 31 is started to blow air into the confining pressure chamber 3 through the oil blowing pipeline 30 to accelerate the discharge of the pressure-resistant oil.

[0029] The following steps are involved:

[0030] Step 1: Sample packaging: Wrap the sample with a rubber protective cover and then place a rubber gasket between the sample base and the detachable indenter;

[0031] Step 2: Perform the axial pressure test. Start the axial pressure pump to fill the oil tank with pressure oil. According to the opening and closing of the needle valve, the pressure oil is filled into the axial pressure chamber through the upper inlet and outlet oil pipeline or the lower inlet and outlet oil pipeline. The hydraulic principle is used to push the axial pressure head upward or downward to realize the axial pressure test.

[0032] Step 3: Conduct confining pressure test, start the confining pressure pump to fill the pressure oil in the oil tank, and then fill it into the confining pressure chamber through the oil filling pipeline to apply confining pressure to achieve confining pressure test. After the test is completed, start the second pressure pump to blow oil through the oil blowing pipeline, and blow the pressure oil into the oil storage tank through the oil drain pipeline;

[0033] Step 4: Perform a water pressure test. Start the upper water pressure pump and the lower water pressure pump to fill the water tank with water, and then fill the sample through the upper water injection pipe and the lower water injection pipe respectively to achieve a water pressure test.

[0034] Step 5: Carry out grouting test, start the grouting pump and draw the slurry in the slurry storage tank through the upper end grouting pipeline or the lower end grouting pipeline to grout the upper end or the lower end of the specimen. When drawing slurry, start the slurry pump to vacuum the overflow slurry storage tank, and draw slurry through the upper end grouting pipeline or the lower end grouting pipeline to form a grouting method that combines injection and extraction to realize the grouting test.

[0035] When conducting a test with the triaxial cyclic shear seepage grouting integrated test device and method, the specimen is placed in a rubber protective sleeve and then gaskets are placed at both ends, where the specimen is placed between the detachable pressure head and the specimen base. The axial pressure pump is started to pump oil through the upper inlet and outlet oil pipelines and the lower inlet and outlet oil pipelines, and the hydraulic principle is used to push the axial pressure head to move axially along the axial pressure chamber to contact the detachable head for extrusion to realize the axial pressure loading test. The confining pressure pump is started to fill oil into the confining pressure chamber through the oil filling pipe to realize the confining pressure loading test. The grouting pump is started to grout the specimen through the upper end grouting pipeline and the lower end grouting pipeline. The grouting pump is started to evacuate the overflow grouting storage tank into a vacuum state, and then grouting is pumped into the specimen through the upper end grouting pipeline and the lower end grouting pipeline to realize the grouting and grouting test.

[0036] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. Triaxial cyclic shear seepage grouting integrated test device, characterized by: The invention comprises a pressure chamber base (1), an integrated test mechanism, a cyclic dynamic load mechanism, a water pressure loading mechanism and a grouting and grouting mechanism, wherein the integrated test mechanism comprises a pressure chamber support column (2), a confining pressure chamber (3), a sample base (4), a rubber protective sleeve (5), a detachable pressure head (6), an axial pressure chamber (7) and an axial pressure head (8), wherein a pressure chamber support column (2) is symmetrically fixed in the middle of the pressure chamber base (1), a confining pressure chamber (3) is fixed above the pressure chamber support column (2), a sample base (4) is fixed in the middle of the bottom of the confining pressure chamber (3), a rubber protective sleeve (5) is provided on the sample base (4), a detachable pressure head (6) is inserted into the upper end of the rubber protective sleeve (5), an axial pressure chamber (7) is fixed above the confining pressure chamber (3), the confining pressure chamber (3) and the axial pressure chamber (7) are connected, an axial pressure head (8) is axially slidably provided in the axial pressure chamber (7), and a cyclic dynamic load mechanism is provided on one side of the axial pressure chamber (7). The circulating dynamic load mechanism includes an upper oil inlet and outlet pipeline (11), a lower oil inlet and outlet pipeline (12), a needle valve (13), an oil drain tank (14), an axial pressure pump (15), a confining pressure pump (16) and an oil filling pipeline (17). The upper side of the axial pressure chamber (7) is connected to the upper oil inlet and outlet pipeline (11), and the lower side of the axial pressure chamber (7) is connected to the lower oil inlet and outlet pipeline (12). The upper oil inlet and outlet pipeline (11) and the lower oil inlet and outlet pipeline (12) are fixedly provided with needle valves. (13), the ends of the upper oil inlet and outlet pipelines (11) and the lower oil inlet and outlet pipelines (12) are matched with an oil drain tank (14), the oil drain tank (14) is connected with an axial pressure pump (15), the oil drain tank (14) is connected with a confining pressure pump (16), and an oil filling pipeline (17) is connected between the confining pressure pump (16) and the confining pressure chamber (3); one side of the confining pressure chamber (3) is connected with a water pressure loading mechanism, and the other side of the confining pressure chamber (3) is connected with a grouting mechanism.

2. The triaxial cyclic shear seepage grouting integrated test device according to claim 1, characterized in that: An axial displacement sensor (9) is fixedly provided next to the detachable pressure head (6) and the axial pressure head (8), and a rubber gasket (10) is provided between the rubber protective sleeve (5), the sample base (4) and the detachable pressure head (6).

3. The triaxial cyclic shear seepage grouting integrated test device according to claim 1, characterized in that: The water pressure loading mechanism comprises an upper water injection pipeline (18), a lower water injection pipeline (19), an upper water pressure pump (20), a lower water pressure pump (21) and a water tank. The detachable pressure head (6) is connected to the upper water injection pipeline (18), and the sample base (4) is connected to the lower water injection pipeline (19). The upper water injection pipeline (18) is connected to the upper water pressure pump (20), and the lower water injection pipeline (19) is connected to the lower water pressure pump (21). Both the upper water pressure pump (20) and the lower water pressure pump (21) are connected to the water tank.

4. The triaxial cyclic shear seepage grouting integrated test device according to claim 3, characterized in that: The grouting mechanism comprises an upper grouting pipeline (22), a lower grouting pipeline (23), a slurry storage tank (24), a grouting pump (25), an overflow slurry storage tank (26) and a grouting pump (27); the other side of the detachable pressure head (6) is connected with the upper grouting pipeline (22); the lower side of the other side of the sample base (4) is connected with the lower grouting pipeline (23); the lower grouting pipeline (23) is connected with the slurry storage tank (24); the slurry storage tank (24) is connected with the grouting pump (25); the upper grouting pipeline (22) is connected with the overflow slurry storage tank (26); and the overflow slurry storage tank (26) is connected with the grouting pump (27).

5. The triaxial cyclic shear seepage grouting integrated test device according to claim 4, characterized in that: The lower end grouting pipeline (23) is connected to a slurry blowing pipeline (28), and the slurry blowing pipeline (28) is connected to a first pressure pump (29).

6. The triaxial cyclic shear seepage grouting integrated test device according to claim 4, characterized in that: An oil blowing pipeline (30) is connected to the upper side of one side of the confining pressure chamber (3), and the oil blowing pipeline (30) is connected to a second pressure pump (31). An oil drain pipeline (32) is connected to the lower side of the other side of the confining pressure chamber (3), and the oil drain pipeline (32) is connected to an oil storage tank (33). The oil drain pipeline (32) is controlled by a ball valve.

7. The triaxial cyclic shear seepage grouting integrated test method according to claim 6 comprises the following steps: Step 1: Sample packaging: Wrap the sample with a rubber protective cover and then place a rubber gasket between the sample base and the detachable indenter; Step 2: Perform the axial pressure loading test. Start the axial pressure pump to fill the oil tank with pressure oil. According to the opening and closing of the needle valve, the pressure oil is filled into the axial pressure chamber through the upper inlet and outlet oil pipeline or the lower inlet and outlet oil pipeline. The hydraulic principle is used to push the axial pressure head upward or downward to realize the axial pressure test. Step 3: Conduct confining pressure loading test, start the confining pressure pump to fill the pressure oil in the oil tank, and then fill it into the confining pressure chamber through the oil filling pipeline to apply confining pressure to achieve confining pressure test. After the test is completed, start the second pressure pump to blow oil through the oil blowing pipeline, and blow the pressure oil into the oil storage tank through the oil discharge pipeline; Step 4: Perform a water pressure loading test, start the upper water pressure pump and the lower water pressure pump to fill the water tank with water, and then fill the sample through the upper water injection pipe and the lower water injection pipe respectively to realize the water pressure test; Step 5: Carry out grouting test, start the grouting pump and draw the slurry in the slurry storage tank through the upper end grouting pipeline or the lower end grouting pipeline to grout the upper end or the lower end of the specimen. When drawing slurry, start the slurry pump to vacuum the overflow slurry storage tank, and draw slurry through the upper end grouting pipeline or the lower end grouting pipeline to form a grouting method that combines injection and extraction to realize the grouting test.

Images