A visual splitting grouting test device and method for two-way loaded fractured rock mass

Abstract

The present invention relates to the field of splitting grouting tests, specifically to a two-way loaded fractured rock visual splitting grouting test device and method, which solves the problem that during the splitting grouting test, the pressure on the rock mass is achieved by hydraulic rods and pressure plates, but the length and width dimensions of the rock samples are different, resulting in uneven pressure distribution provided by the pressure plates, and different pressure plates need to be replaced according to the size of the rock samples during the experiment. A two-way loaded fractured rock visual splitting grouting test device and method, comprising a steel plate box and an ultra-high-speed camera, wherein four symmetrically positioned electric telescopic rods for fixing an observation plate are fixed to the inner side of the steel plate box, and the movable ends of the four electric telescopic rods for fixing the observation plate are fixed with transparent observation plates. The present invention utilizes an adjustable pressure mechanism to pressurize the rock sample, eliminating the need to replace the pressure plate according to the rock sample, and ensuring that the applied pressure is evenly distributed.

Description

Technical Field

[0001] The invention relates to the field of splitting grouting tests, and in particular to a device and method for visual splitting grouting tests of two-way loaded fractured rock masses. Background Art

[0002] Split grouting is a widely used method for reinforcing soft soil layers. It can be applied to sand layers with good permeability as well as clay layers with poor permeability. Commonly used grouting methods include: flower pipe grouting and one-way valve pipe grouting. The split grouting test is a test method that uses high-pressure slurry to overcome the initial compressive stress on the principal stress surface of the soil, causing the soil to split and fail. The slurry penetrates into the soil along the split cracks to fill the voids and compact the soil on the side of the pile, promoting soil consolidation and thus improving the soil strength in the grouting area.

[0003] However, during the existing splitting grouting test, the pressure on the rock mass is achieved through hydraulic rods and pressure plates. However, the length and width of the rock samples are different, resulting in uneven pressure distribution provided by the pressure plates. Different pressure plates need to be replaced according to the size of the rock samples during the experiment. Therefore, it does not meet the existing needs. In this regard, we propose a two-way loaded fractured rock visual splitting grouting test device and method. Summary of the Invention

[0004] The purpose of the present invention is to provide a two-way loaded fractured rock visual splitting grouting test device and method to solve the problem proposed in the above background technology that during the splitting grouting test, the rock mass is pressurized by hydraulic rods and pressure plates, but the length and width of the rock samples are different, resulting in uneven pressure distribution provided by the pressure plates, and different pressure plates need to be replaced according to the size of the rock samples during the experiment.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a two-way loaded fractured rock visual splitting grouting test device, comprising a steel plate box and an ultra-high-speed camera, wherein four symmetrically positioned electric telescopic rods for fixing an observation plate are fixed to the inner side of the steel plate box, and the movable ends of the four electric telescopic rods for fixing the observation plate are fixed with transparent observation plates, the ultra-high-speed camera is located directly in front of the transparent observation plate, and a plurality of rock samples spliced ​​together are provided between the transparent observation plate and the steel plate box, a mortar perfusion pipe is inserted through the rear end of the steel plate box, the mortar perfusion pipe is located at the splicing gap of the rock sample, a mortar delivery pipe is fixed to the rear end of the mortar perfusion pipe, one end of the mortar delivery pipe is connected to a mortar storage box, a mortar delivery pump is provided between the mortar delivery pipe and the mortar storage box, an axial pressure structure is installed above the rock sample, and a lateral pressure structure is installed on one side of the rock sample.

[0006] Preferably, the axial pressure structure includes a top fixing frame fixed on the top of the steel plate box, an adjustable electric telescopic rod is fixed to the bottom surface of the top fixing frame, a plurality of top pressure hydraulic rods are provided on both sides of the adjustable electric telescopic rod, the top pressure hydraulic rod is fixed to the top fixing frame, a lifting plate is fixed to the bottom end of the adjustable electric telescopic rod, a top pressure plate is provided below the lifting plate, a plurality of linearly distributed distribution pressure plates are fixed to the upper surface of the top pressure plate, and the movable end of the top pressure hydraulic rod passes through the lifting plate and is fixed to the distribution pressure plate.

[0007] Preferably, a rectangular sealing groove is provided on the outer side of the lifting plate, a rectangular sealing airbag is clamped on the inner side of the rectangular sealing groove, one end of the rectangular sealing airbag is connected to a second air pipe, one end of the second air pipe is fixed with a second sealed bidirectional air pump, and the second sealed bidirectional air pump is fixed on the upper surface of the lifting plate.

[0008] Preferably, the lateral pressure structure includes a lateral fixing frame, the bottom end of the lateral fixing frame is fixed to the side of the steel plate box, a sliding plate is slidably installed on the outer side of the lateral fixing frame, a lateral adjustment hydraulic rod is fixed on the outer surface of the sliding plate, a moving block is fixed on the movable end of the lateral adjustment hydraulic rod, the top and bottom ends of the moving block are both rotatably installed with a rotating connecting plate through a rotating shaft, the end of the rotating connecting plate close to the rock sample is rotatably installed with an adjusting slider through a rotating shaft, and an adjustable lateral pressure plate is provided between the two adjusting sliders and the rock sample.

[0009] Preferably, the adjustable side pressure plate includes a rubber outer shell, a plurality of spliced ​​side panels are linearly arranged inside the rubber outer shell, and rubber filling strips are filled between the spliced ​​side panels.

[0010] Preferably, two side extrusion plates are provided between the two adjusting sliders, the side extrusion plates are in an X shape, the side extrusion plates fit the outer surface of the adjustable side pressure plate, and two side pressure hydraulic rods are also fixed to the outer surface of the sliding plate.

[0011] Preferably, the two side pressure hydraulic rods are symmetrically positioned above and below the side adjustment hydraulic rod respectively. A through groove is provided on the surface of the rotating connecting plate. The movable end of the side pressure hydraulic rod passes through the through groove and is fixed to the side extrusion plate.

[0012] Preferably, the transparent observation panel includes a transparent acrylic panel, and the transparent acrylic panel is fixed to the observation panel by a movable end portion of an electric telescopic rod. A receiving groove is provided on the surface of the transparent acrylic panel facing the rock sample, and a filled water bag is provided on the inner side of the receiving groove. A rock contact transparent panel is provided between the filled water bag and the rock sample, and a surface area of ​​the rock contact transparent panel is larger than the rock surface area formed by the rock samples after splicing.

[0013] Preferably, a sealing groove is provided on the bottom surface of the transparent acrylic plate and the side surface in contact with the steel box, a sealing airbag strip is clamped on the inner side of the sealing groove, a first air tube is fixed to one end of the sealing airbag strip, a first sealed bidirectional air pump is fixed to the other end of the first air tube, a water pipe is fixed to one side of the water filling bag, the water pipe passes through the transparent acrylic plate and is connected to the water pump.

[0014] A test method for a two-way loaded fractured rock mass visual splitting grouting test device, the test method comprising the following steps:

[0015] S1: Cut the rock mass into multiple rock samples of the same or different sizes according to experimental requirements, apply vaseline on the outside of the rock samples, and then splice the rock samples together and place them inside a steel box;

[0016] S2: Turn on the power of the electric telescopic rod for fixing the observation plate and start it. The electric telescopic rod for fixing the observation plate pushes the transparent acrylic plate and the rock contact transparent plate to move so that the rock contact transparent plate is in contact with the front surface of the rock sample;

[0017] S3: The first sealed bidirectional air pump and water pump are powered on and started. The water pump sends water into the water bag through the water pipe, so that the rock mass contacts the transparent plate and uniformly applies pressure to the rock mass sample from the front.

[0018] S4: The first sealed bidirectional air pump delivers gas into the sealed airbag strip through the first air pipe, causing the sealed airbag strip to expand and seal the gap between the steel box and the transparent acrylic plate;

[0019] S5: Adjust the electric telescopic rod and the top pressure hydraulic rod and power them on at the same time. Adjust the electric telescopic rod to drive the lifting plate, and the top pressure hydraulic rod to drive the distribution pressure plate and the top pressure plate to move downward until the top pressure plate contacts the upper surface of the rock sample.

[0020] S6: Adjust the electric telescopic rod to close, and select an appropriate number of top pressure hydraulic rods to start according to the length of the rock mass after the rock mass sample is spliced, so that the top pressure hydraulic rods apply pressure to the top pressure plate through the distribution pressure plate, so that the top of the rock mass sample is evenly stressed;

[0021] S7: The side adjustment hydraulic rod is energized and drives the moving block to move linearly. As the moving block moves linearly, the two rotating connecting plates rotate around the axis to open and close, thereby driving the adjustment slider to move linearly, so that the adjustment slider presses the adjustable side pressure plate against the side of the rock sample, and the adjustment slider slides along the outer surface of the adjustable side pressure plate;

[0022] S8: until the adjusting slider squeezes the end of the adjustable side pressure plate and fits it with the top pressure plate or the steel box, then the side pressure hydraulic rod starts and drives the side extrusion plate to move;

[0023] S9: The side compression plate applies compression to the adjustable side pressure plate, so that the spliced ​​side plates inside the adjustable side pressure plate evenly transmit the pressure to the side of the rock sample;

[0024] S10: Mortar delivery pump: Finally, the mortar delivery pump delivers the mortar inside the mortar storage box to the mortar pouring pipe through the mortar delivery pipe. The mortar pouring pipe pours the mortar into the gaps between adjacent rock samples. The ultra-high-speed camera captures the mortar flow between adjacent rock samples.

[0025] Compared with the prior art, the test method of the present invention has the following beneficial effects:

[0026] 1. The present invention uses an adjustable electric telescopic rod and a top pressure hydraulic rod to drive the lifting plate and the top pressure plate to move, so that the top pressure plate fits the top of the rock sample. Then, according to the overall length of the rock sample, an appropriate number of top pressure hydraulic rods are selected to apply pressure to the distribution pressure plate and the top pressure plate to ensure that the overall force of the rock sample is uniform. The adjustment is made according to the length of the rock sample after splicing, so as to adapt to the experimental use of rock sample splices of different sizes.

[0027] 2. The present invention uses the side adjustment hydraulic rod to push the moving block and the rotating connecting plate to move toward the rock sample, so that the two adjusting sliders squeeze the adjustable side pressure plates against the side of the rock sample, and the adjusting slider slides in contact with the outer surface of the adjustable side pressure plate, so that the adjustable side pressure plate fills the gap between the top pressure plate and the steel plate box. At this time, the adjustable side pressure plate completely seals the side of the rock sample and is adjusted according to the width of the rock mass after splicing the rock sample, so as to adapt to the experimental use of rock sample splices of different sizes, and by using the side pressure hydraulic rod to pressurize the side extrusion plate, the X-shaped side extrusion plate evenly distributes the pressure to the splicing side plate inside the adjustable side pressure plate that fits the rock sample, so that the side of the spliced ​​rock sample is evenly stressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0029] Figure 2 This is a schematic diagram of the rear structure of the steel plate box of the present invention;

[0030] Figure 3 Schematic diagram of the structure of the axial pressure structure and the lateral pressure structure of the present invention;

[0031] Figure 4 It is a structural schematic diagram of the lifting plate of the present invention;

[0032] Figure 5 This is a schematic diagram of the internal structure of the lifting plate of the present invention;

[0033] Figure 6 This is a schematic structural diagram of the adjustable side pressure plate of the present invention;

[0034] Figure 7 Schematic diagram of the structure of the transparent observation plate of the present invention;

[0035] Figure 8 It is a schematic diagram of the structure of the rock contact transparent plate and the water filling bag of the present invention.

[0036] Figure: 1, steel box; 2, ultra-high-speed camera; 3, electric telescopic rod for fixing the observation plate; 4, transparent observation plate; 401, transparent acrylic plate; 402, water pipe; 403, sealing groove; 404, sealing airbag strip; 405, first air pipe; 406, first sealed two-way air pump; 407, water pump; 408, rock contact transparent plate; 409, filling water bag; 410, storage tank; 5, axial pressure structure; 501, top fixing frame; 502, adjustable electric telescopic rod; 503, top pressure hydraulic rod; 504, lifting plate; 505, rectangular sealing airbag; 506, top pressure plate; 507, second sealing Bidirectional air pump; 508, second air pipe; 509, rectangular sealing groove; 510, distributed pressure plate; 6, lateral pressure structure; 601, lateral fixing frame; 602, sliding plate; 603, lateral adjustment hydraulic rod; 604, lateral pressure hydraulic rod; 605, moving block; 606, rotating connecting plate; 607, lateral extrusion plate; 608, adjusting slider; 609, through-groove; 610, adjustable lateral pressure plate; 6101, rubber jacket; 6102, splicing side plate; 6103, rubber filling strip; 7, mortar storage box; 8, mortar delivery pipe; 9, mortar injection pipe; 10, mortar delivery pump; 11, rock sample. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] like Figure 1 and Figure 2As shown, a two-way loaded fractured rock visual splitting grouting test device includes a steel plate box 1 and an ultra-high-speed camera 2. Four symmetrically positioned electric telescopic rods 3 for fixing observation panels are fixed on the inner side of the steel plate box 1. The movable ends of the four electric telescopic rods 3 for fixing observation panels are fixed with transparent observation panels 4. The ultra-high-speed camera 2 is located in front of the transparent observation panels 4. A plurality of rock samples 11 spliced ​​together are provided between the transparent observation panels 4 and the steel plate box 1. A mortar pouring pipe 9 is inserted through the rear end of the steel plate box 1. The mortar pouring pipe 9 is located at the splicing gap of the rock sample 11. The rear end of the mortar pouring pipe 9 is fixed with A mortar delivery pipe 8 is provided, one end of which is connected to a mortar storage box 7. A mortar delivery pump 10 is provided between the mortar delivery pipe 8 and the mortar storage box 7. An axial pressure structure 5 is installed above the rock sample 11, and a lateral pressure structure 6 is installed on one side of the rock sample 11. The axial pressure structure 5 and the lateral pressure structure 6 are used to press the rock samples 11 spliced ​​together from above and from the side, and then the mortar is poured into the gaps between the rock samples 11 spliced ​​together through the mortar pouring pipe 9. The flow of the mortar between the rock samples 11 spliced ​​together is photographed and recorded using an ultra-high-speed camera 2.

[0039] like Figure 1 、 Figure 7 and Figure 8 As shown, the transparent observation plate 4 includes a transparent acrylic plate 401, which is fixed to the observation plate by the movable end of the electric telescopic rod 3. The surface of the transparent acrylic plate 401 facing the rock sample 11 is provided with a receiving groove 410, and the inner side of the receiving groove 410 is provided with a filling water bag 409. A rock contact transparent plate 408 is provided between the filling water bag 409 and the rock sample 11. The surface area of ​​the rock contact transparent plate 408 is larger than the rock surface area formed by the rock sample 11 after splicing. The transparent acrylic plate 401 and the rock contact transparent plate 408 are used to fix the front of the rock sample 11 to ensure that the rock sample 11 will not move forward and backward during the experiment.

[0040] The bottom surface of the transparent acrylic plate 401 and the side surface that is in contact with the steel box 1 are provided with a sealing groove 403, the inner side of the sealing groove 403 is clamped with a sealing airbag strip 404, one end of the sealing airbag strip 404 is fixed with a first air pipe 405, the other end of the first air pipe 405 is fixed with a first sealed two-way air pump 406, and one side of the water bag 409 is fixed with a water pipe 402, which passes through the transparent acrylic plate 401 and is connected to a water pump 407. The pump 406 delivers gas to the sealed airbag strip 404 through the first air pipe 405, causing the sealed airbag strip 404 to expand and seal the gap between the transparent acrylic plate 401 and the steel box 1, thereby ensuring the overall sealing of the device during the experiment. Water is filled into the filling water bag 409 through the water pump 407 and the water pipe 402, causing the filling water bag 409 to expand and squeeze the rock contact transparent plate 408 toward the rock sample 11, so that the pressure in front of the rock sample 11 is uniform.

[0041] like Figures 3 to 5 As shown, the axial pressure structure 5 includes a top fixing frame 501 fixed on the top of the steel box 1, an adjustable electric telescopic rod 502 is fixed on the bottom surface of the top fixing frame 501, and a plurality of top pressure hydraulic rods 503 are provided on both sides of the adjustable electric telescopic rod 502. The top pressure hydraulic rod 503 is fixed to the top fixing frame 501, and a lifting plate 504 is fixed to the bottom end of the adjustable electric telescopic rod 502. A top pressure plate 506 is provided below the lifting plate 504, and a plurality of linearly distributed distributed pressure hydraulic rods 503 are fixed on the upper surface of the top pressure plate 506. Plate 510, the movable end of the top pressure hydraulic rod 503 passes through the lifting plate 504 and is fixed to the distribution pressure plate 510, and the lifting plate 504 and the top pressure plate 506 are driven to move by adjusting the electric telescopic rod 502 and the top pressure hydraulic rod 503, so that the top pressure plate 506 fits the top of the rock sample 11, and then, according to the overall length of the rock sample 11, an appropriate number of top pressure hydraulic rods 503 are selected to apply pressure to the distribution pressure plate 510 and the top pressure plate 506 to ensure that the rock sample 11 is subjected to uniform force as a whole.

[0042] A rectangular sealing groove 509 is provided on the outer side of the lifting plate 504, and a rectangular sealing airbag 505 is clamped on the inner side of the rectangular sealing groove 509. One end of the rectangular sealing airbag 505 is connected to a second air pipe 508, and one end of the second air pipe 508 is fixed with a second sealed two-way air pump 507. The second sealed two-way air pump 507 is fixed on the upper surface of the lifting plate 504. The second sealed two-way air pump 507 is used to transport gas into the rectangular sealing airbag 505 inside the rectangular sealing groove 509, so that the rectangular sealing airbag 505 expands and seals the gaps between the lifting plate 504 and the steel plate box 1, the rock contact transparent plate 408, and the transparent acrylic plate 401, to ensure that the mortar between the rock samples 11 and the rock samples 11 will not leak out during the experiment.

[0043] like Figure 3 and Figure 6 As shown, the lateral pressure structure 6 includes a lateral fixing frame 601, the bottom end of the lateral fixing frame 601 is fixed to the side of the steel box 1, a sliding plate 602 is slidably installed on the outer side of the lateral fixing frame 601, a lateral adjustment hydraulic rod 603 is fixed on the outer surface of the sliding plate 602, a movable end of the lateral adjustment hydraulic rod 603 is fixed to a moving block 605, the top and bottom ends of the moving block 605 are both rotatably installed with a rotating connecting plate 606 through a rotating shaft, and the end of the rotating connecting plate 606 close to the rock sample 11 is rotatably installed with an adjusting slider 608 through a rotating shaft, and the two adjusting sliders are fixed to the rock sample 11. An adjustable side pressure plate 610 is provided between the block 608 and the rock sample 11. The side adjustment hydraulic rod 603 is used to push the movable block 605 and the rotating connecting plate 606 toward the rock sample 11, so that the two adjustment sliders 608 squeeze the adjustable side pressure plate 610 against the side of the rock sample 11, and the adjustment slider 608 slides along the outer surface of the adjustable side pressure plate 610, so that the adjustable side pressure plate 610 fills the gap between the top pressure plate 506 and the steel plate box 1. At this time, the adjustable side pressure plate 610 completely seals the side of the rock sample 11.

[0044] The adjustable side pressure plate 610 includes a rubber jacket 6101, and a plurality of spliced ​​side panels 6102 are linearly arranged inside the rubber jacket 6101. Rubber filling strips 6103 are filled between the spliced ​​side panels 6102 and the spliced ​​side panels 6102. The spliced ​​side panels 6102 and the spliced ​​side panels 6102 are connected by the rubber filling strips 6103, so that the adjustable side pressure plate 610 is bendable as a whole and can be adjusted according to the width of the rock mass after the rock sample 11 is spliced.

[0045] Two side extrusion plates 607 are provided between the two adjusting sliders 608. The side extrusion plates 607 are in an X shape and fit the outer surface of the adjustable side pressure plate 610. Two side pressure hydraulic rods 604 are also fixed to the outer surface of the sliding plate 602. The two side pressure hydraulic rods 604 are symmetrically positioned above and below the side adjustment hydraulic rod 603 respectively. A through groove 609 is penetrated by the surface of the rotating connecting plate 606. The movable end of the side pressure hydraulic rod 604 passes through the through groove 609 and is fixed to the side extrusion plate 607. The side pressure hydraulic rod 604 is used to pressurize the side extrusion plate 607, so that the X-shaped side extrusion plate 607 evenly distributes pressure to the splicing side plate 6102 inside the adjustable side pressure plate 610 that fits the rock sample 11, so that the side force of the spliced ​​rock sample 11 is uniform.

[0046] A test method for a two-way loaded fractured rock mass visual splitting grouting test device, the test method comprising the following steps:

[0047] S1: Cut the rock mass into multiple rock samples 11 of the same or different sizes according to experimental requirements, apply vaseline on the outside of the rock samples 11, and then splice the rock samples 11 together and place them inside the steel box 1;

[0048] S2: The electric telescopic rod 3 for fixing the observation plate is powered on and started. The electric telescopic rod 3 for fixing the observation plate pushes the transparent acrylic plate 401 and the rock contact transparent plate 408 to move, so that the rock contact transparent plate 408 is in contact with the front surface of the rock sample 11;

[0049] S3: The first sealed bidirectional air pump 406 and the water pump 407 are powered on and started. The water pump 407 delivers water into the water filling bag 409 through the water pipe 402, so that the rock mass contacts the transparent plate 408 and uniformly applies pressure to the rock mass sample 11 from the front.

[0050] S4: The first sealed bidirectional air pump 406 delivers gas into the sealed airbag strip 404 through the first air pipe 405, causing the sealed airbag strip 404 to expand and seal the gap between the steel box 1 and the transparent acrylic plate 401;

[0051] S5: The electric telescopic rod 502 and the top pressure hydraulic rod 503 are adjusted and powered on at the same time, and the electric telescopic rod 502 is adjusted to drive the lifting plate 504, and the top pressure hydraulic rod 503 drives the distribution pressure plate 510 and the top pressure plate 506 to move downward until the top pressure plate 506 contacts the upper surface of the rock sample 11;

[0052] S6: Adjust the electric telescopic rod 502 to close, and select an appropriate number of top pressure hydraulic rods 503 to start according to the length of the rock mass after the rock mass sample 11 is spliced, so that the top pressure hydraulic rods 503 apply pressure to the top pressure plate 506 through the distribution pressure plate 510, so that the top of the rock mass sample 11 is evenly stressed;

[0053] S7: The lateral adjustment hydraulic rod 603 is energized and drives the moving block 605 to move linearly. As the moving block 605 moves linearly, the two rotating connecting plates 606 rotate around the axis to open and close, thereby driving the adjustment slider 608 to move linearly, so that the adjustment slider 608 presses the adjustable lateral pressure plate 610 against the side of the rock sample 11, and the adjustment slider 608 slides along the outer surface of the adjustable lateral pressure plate 610;

[0054] S8: until the adjusting slider 608 squeezes the end of the adjustable side pressure plate 610 and fits it with the top pressure plate 506 or the steel box 1, then the side pressure hydraulic rod 604 is activated and drives the side extrusion plate 607 to move;

[0055] S9: The side extrusion plate 607 applies pressure to the adjustable side pressure plate 610, so that the spliced ​​side plates 6102 inside the adjustable side pressure plate 610 evenly transmit the pressure to the side of the rock sample 11;

[0056] S10: Finally, the mortar delivery pump 10 delivers the mortar inside the mortar storage box 7 to the mortar pouring pipe 9 through the mortar delivery pipe 8. The mortar pouring pipe 9 pours the mortar into the gaps between adjacent rock samples 11. The ultra-high-speed camera 2 shoots the mortar flow between adjacent rock samples 11.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A two-way loaded fractured rock mass visual splitting grouting test device, comprising a steel plate box (1) and an ultra-high-speed camera (2), characterized in that: Four symmetrically positioned electric telescopic rods (3) for fixing an observation panel are fixed on the inner side of the steel plate box (1), and a transparent observation panel (4) is fixed to the movable ends of the four electric telescopic rods (3) for fixing an observation panel. The ultra-high-speed camera (2) is located in front of the transparent observation panel (4), and a plurality of rock samples (11) spliced ​​together are provided between the transparent observation panel (4) and the steel plate box (1). A mortar pouring pipe (9) is inserted through the rear end of the steel plate box (1), and the mortar pouring pipe (9) is located at the splicing gap of the rock sample (11). A mortar delivery pipe (8) is fixed to the rear end of the mortar pouring pipe (9), and one end of the mortar delivery pipe (8) is connected to a mortar storage box (7). A mortar delivery pump (10) is provided between the mortar delivery pipe (8) and the mortar storage box (7). An axial pressure structure (5) is installed above the rock sample (11), and a lateral pressure structure (6) is installed on one side of the rock sample (11). The axial pressure structure (5) includes a top fixing frame (501) fixed on the top of the steel plate box (1), an adjustable electric telescopic rod (502) is fixed on the bottom surface of the top fixing frame (501), a plurality of top pressure hydraulic rods (503) are provided on both sides of the adjustable electric telescopic rod (502), the top pressure hydraulic rods (503) are fixed to the top fixing frame (501), a lifting plate (504) is fixed to the bottom end of the adjustable electric telescopic rod (502), a top pressure plate (506) is provided below the lifting plate (504), a plurality of linearly distributed distribution pressure plates (510) are fixed on the upper surface of the top pressure plate (506), and the movable end of the top pressure hydraulic rod (503) passes through the lifting plate (504) and is fixed to the distribution pressure plate (510); A rectangular sealing groove (509) is provided on the outer side of the lifting plate (504), a rectangular sealing airbag (505) is clamped on the inner side of the rectangular sealing groove (509), one end of the rectangular sealing airbag (505) is connected to a second air pipe (508), one end of the second air pipe (508) is fixed with a second sealed bidirectional air pump (507), and the second sealed bidirectional air pump (507) is fixed to the upper surface of the lifting plate (504); The lateral pressure structure (6) includes a lateral fixing frame (601), the bottom end of the lateral fixing frame (601) is fixed to the side of the steel plate box (1), a sliding plate (602) is slidably installed on the outer side of the lateral fixing frame (601), a lateral adjustment hydraulic rod (603) is fixed on the outer surface of the sliding plate (602), a movable end of the lateral adjustment hydraulic rod (603) is fixed with a moving block (605), the top and bottom ends of the moving block (605) are both rotatably installed with a rotating connecting plate (606) through a rotating shaft, the end of the rotating connecting plate (606) close to the rock sample (11) is rotatably installed with an adjusting slider (608) through a rotating shaft, and an adjustable lateral pressure plate (610) is provided between the two adjusting sliders (608) and the rock sample (11); The adjustable side pressure plate (610) comprises a rubber outer shell (6101), a plurality of spliced ​​side panels (6102) are linearly arranged inside the rubber outer shell (6101), and rubber filling strips (6103) are filled between the spliced ​​side panels (6102); Two side extrusion plates (607) are provided between the two adjusting sliders (608), and the side extrusion plates (607) are X-shaped. The side extrusion plates (607) fit the outer surface of the adjustable side pressure plate (610), and two side pressure hydraulic rods (604) are also fixed to the outer surface of the sliding plate (602); The two side pressure hydraulic rods (604) are symmetrically positioned above and below the side adjustment hydraulic rod (603), respectively. A through groove (609) is provided through the surface of the rotating connecting plate (606). The movable end of the side pressure hydraulic rod (604) passes through the through groove (609) and is fixed to the side extrusion plate (607).

2. A two-way loaded fractured rock mass visual splitting grouting test device according to claim 1, characterized in that: The transparent observation plate (4) comprises a transparent acrylic plate (401), the transparent acrylic plate (401) and the observation plate being fixed by the movable end of an electric telescopic rod (3), a receiving groove (410) is provided on the surface of the transparent acrylic plate (401) facing the rock sample (11), a water filling bag (409) is provided on the inner side of the receiving groove (410), a rock contact transparent plate (408) is provided between the water filling bag (409) and the rock sample (11), and the surface area of ​​the rock contact transparent plate (408) is larger than the rock surface area formed by the rock sample (11) after splicing.

3. The visual splitting grouting test device for two-way loaded fractured rock mass according to claim 2, characterized in that: The bottom surface of the transparent acrylic plate (401) and the side surface contacting the steel plate box (1) are provided with a sealing groove (403), the inner side of the sealing groove (403) is clamped with a sealing airbag strip (404), one end of the sealing airbag strip (404) is fixed with a first air pipe (405), the other end of the first air pipe (405) is fixed with a first sealed bidirectional air pump (406), and one side of the water filling bag (409) is fixed with a water pipe (402), the water pipe (402) passes through the transparent acrylic plate (401) and is connected to a water pump (407).

4. The test method of the two-way loaded fractured rock mass visual splitting grouting test device according to claim 3 is characterized by: The test method comprises the following steps: S1: Cut the rock into multiple rock samples (11) of the same or different sizes according to experimental requirements, apply vaseline on the outside of the rock samples (11), and then splice the rock samples (11) together and place them inside the steel box (1); S2: The electric telescopic rod (3) for fixing the observation plate is powered on and started, and the electric telescopic rod (3) for fixing the observation plate pushes the transparent acrylic plate (401) and the rock contact transparent plate (408) to move, so that the rock contact transparent plate (408) is attached to the front surface of the rock sample (11); S3: The first sealed bidirectional air pump (406) and the water pump (407) are powered on and started, and the water pump (407) sends water into the water bag (409) through the water pipe (402), so that the rock mass contacts the transparent plate (408) and uniformly applies pressure to the rock mass sample (11) from the front; S4: The first sealed bidirectional air pump (406) delivers gas into the interior of the sealed airbag strip (404) through the first air pipe (405), causing the sealed airbag strip (404) to expand and seal the gap between the steel box (1) and the transparent acrylic plate (401); S5: The electric telescopic rod (502) and the top pressure hydraulic rod (503) are energized and started simultaneously, and the electric telescopic rod (502) is adjusted to drive the lifting plate (504), and the top pressure hydraulic rod (503) drives the distribution pressure plate (510) and the top pressure plate (506) to move downward until the top pressure plate (506) contacts the upper surface of the rock sample (11); S6: adjusting the electric telescopic rod (502) to close, and selecting an appropriate number of top pressure hydraulic rods (503) to start according to the length of the rock mass after the rock mass sample (11) is spliced, so that the top pressure hydraulic rods (503) apply pressure to the top pressure plate (506) through the distribution pressure plate (510), so that the top of the rock mass sample (11) is evenly stressed; S7: The side adjustment hydraulic rod (603) is energized and drives the moving block (605) to move linearly. Along with the linear displacement of the moving block (605), the two rotating connecting plates (606) rotate around the axis to open and close, thereby driving the adjustment slider (608) to move linearly, so that the adjustment slider (608) squeezes the adjustable side pressure plate (610) against the side of the rock sample (11), and the adjustment slider (608) slides in contact with the outer surface of the adjustable side pressure plate (610); S8: until the adjusting slider (608) squeezes the end of the adjustable side pressure plate (610) and fits it with the top pressure plate (506) or the steel box (1), at which time the side pressure hydraulic rod (604) is activated and drives the side extrusion plate (607) to move; S9: the side extrusion plate (607) squeezes the adjustable side pressure plate (610) toward the rock sample (11), and the pressure is evenly transmitted to the side of the rock sample (11) through the adjustable side pressure plate (610); S10: Finally, the mortar delivery pump (10) delivers the mortar inside the mortar storage box (7) to the mortar pouring pipe (9) through the mortar delivery pipe (8). The mortar pouring pipe (9) pours the mortar into the gaps between adjacent rock samples (11). The ultra-high-speed camera (2) captures the mortar flow between adjacent rock samples (11).

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