Visual splitting grouting test device and method for bidirectionally-loaded fractured rock mass

Abstract

The invention relates to the field of splitting grouting tests, in particular to a two-way loading fractured rock mass visual splitting grouting test device and method, and solves the problems that when a splitting grouting test is carried out, pressurization of a rock mass is achieved through a hydraulic rod and a pressurization plate, but the lengths and widths of rock mass samples are different, so that the pressure provided by the pressurization plate is distributed unevenly, and the fracturing effect is poor. And different pressurizing plates need to be replaced according to the size of a rock mass sample during an experiment. The invention relates to a bidirectional loading fractured rock mass visual splitting grouting test device and method, the device comprises a steel plate box and an ultra-high-speed camera, four electric telescopic rods which are symmetrical in position and are used for fixing an observation plate are fixed on the inner side of the steel plate box, and transparent observation plates are fixed on the movable end parts of the four electric telescopic rods for fixing the observation plate. The adjustable pressurizing mechanism is used for pressurizing the rock mass sample, a pressurizing plate does not need to be replaced according to the rock mass sample, and it is guaranteed that the applied pressure is evenly distributed.

Description

Technical Field

[0001] The present invention relates to the field of splitting grouting tests, and specifically to a two-way loading fissured rock mass visualization splitting grouting test device and method. Background Technique

[0002] Splitting grouting is a widely used method for soft soil layer reinforcement. It can be applied to both sandy layers with better permeability and cohesive soils with poor permeability. The commonly used grouting methods are: two construction methods of perforated pipe grouting and one-way valve pipe grouting. The splitting grouting test is a test method in which high-pressure grout overcomes the initial compressive stress on the main stress surface of the soil, causing the soil to undergo splitting failure. The grout infiltrates into the soil along the splitting cracks to fill the voids, and compacts the soil on the side of the pile, promoting soil consolidation and thus improving the strength of the soil in the grouting area.

[0003] However, when the existing splitting grouting test is carried out, the pressurization of the rock mass is achieved through a hydraulic rod and a pressure plate. However, the length and width dimensions of the rock mass samples are different, resulting in uneven pressure distribution provided by the pressure plate, and different pressure plates need to be replaced according to the size of the rock mass samples during the experiment. Therefore, it does not meet the existing requirements. For this reason, we propose a two-way loading fissured rock mass visualization splitting grouting test device and method. Summary of the Invention

[0004] The purpose of the present invention is to provide a two-way loading fissured rock mass visualization splitting grouting test device and method to solve the problems mentioned in the above background technique, that is, when the splitting grouting test is carried out, the pressurization of the rock mass is achieved through a hydraulic rod and a pressure plate, but the length and width dimensions of the rock mass samples are different, resulting in uneven pressure distribution provided by the pressure plate, and different pressure plates need to be replaced according to the size of the rock mass samples during the experiment.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A two-way loading fissured rock mass visualization splitting grouting test device, including a steel plate box and an ultra-high-speed camera. Four symmetrically positioned electric telescopic rods for fixing the observation plate are fixed inside the steel plate box. The movable ends of the four electric telescopic rods for fixing the observation plate are fixed with a transparent observation plate. The ultra-high-speed camera is located directly in front of the transparent observation plate. A plurality of spliced rock mass samples are arranged 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, and the mortar perfusion pipe is located at the splicing gap of the rock mass samples. 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 tank. A mortar delivery pump is arranged between the mortar delivery pipe and the mortar storage tank. An axial pressurization structure is installed above the rock mass samples, and a lateral pressurization structure is installed on one side of the rock mass samples.

[0006] Preferably, the axial pressure structure includes a top fixing frame fixed to 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 rods are fixed to the top fixing frame. The bottom end of the adjustable electric telescopic rod is fixed with a lifting plate. A top pressure plate is arranged below the lifting plate. A plurality of linearly distributed pressure plates are fixed to the upper surface of the top pressure plate. The movable end of the top pressure hydraulic rod penetrates through the lifting plate and is fixed to the pressure plate.

[0007] Preferably, a rectangular sealing groove is arranged on the outer side of the lifting plate. A rectangular sealing airbag is clamped inside the rectangular sealing groove. One end of the rectangular sealing airbag is connected through a second air pipe. One end of the second air pipe is fixed with a second sealed two-way air pump. The second sealed two-way air pump is fixed to the upper surface of the lifting plate.

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

[0009] Preferably, the adjustable lateral pressure plate includes a rubber outer sleeve. A plurality of spliced side plates are linearly arranged inside the rubber outer sleeve. Rubber filling strips are filled between the spliced side plates.

[0010] Preferably, two side extrusion plates are arranged between the two adjusting sliders. The side extrusion plates are in an X shape. The side extrusion plates are attached to the outer surface of the adjustable lateral pressure plate. 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 arranged up and down and are respectively located above and below the side adjustment hydraulic rod. A through groove is arranged through 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 plate includes a transparent acrylic plate. The transparent acrylic plate is fixed to the movable end of the electric telescopic rod for fixing the observation plate. A storage groove is arranged on the surface of the transparent acrylic plate facing the rock sample. A filling water bag is arranged inside the storage groove. A rock contact transparent plate is arranged between the filling water bag and the rock sample. The surface area of the rock contact transparent plate is larger than the surface area of the rock body formed after splicing the rock samples.

[0013] Preferably, a sealing groove is provided on the bottom surface of the transparent acrylic plate and the side surface that fits the steel box. A sealing airbag strip is clamped inside the sealing groove. One end of the sealing airbag strip is fixed with a first air pipe, and the other end of the first air pipe is fixed with a first sealed two-way air pump. One side of the water-filled bladder is fixed with a water pipe, and the water pipe penetrates through the transparent acrylic plate and is connected to a water pump.

[0014] A test method for a two-way loading fissured rock mass visualization splitting grouting test device, the test method comprising the following steps: S1: Cut the rock mass into multiple rock mass samples with the same or different sizes according to the experimental requirements, apply vaseline on the outer side of the rock mass samples, and then splice the rock mass samples together and place them inside the steel box; S2: Connect the power supply 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 mass contact transparent plate to move, so that the rock mass contact transparent plate fits the front surface of the rock mass sample; S3: The first sealed two-way air pump and the water pump are powered on and started. The water pump sends water into the water-filled bladder through the water pipe, so that the rock mass contact transparent plate uniformly applies pressure to the rock mass sample from the front; S4: The first sealed two-way air pump sends gas into the sealing airbag strip through the first air pipe, so that the sealing airbag strip expands and seals the gap between the steel box and the transparent acrylic plate; S5: Adjust the electric telescopic rod and the top pressurizing hydraulic rod to be powered on and started at the same time. Adjust the electric telescopic rod to drive the lifting plate, and the top pressurizing hydraulic rod to drive the distributed pressurizing plate and the top pressing plate to move downward until the top pressing plate contacts the upper surface of the rock mass sample; S6: Turn off the electric telescopic rod, and select an appropriate number of top pressurizing hydraulic rods to start according to the length of the rock mass after splicing the rock mass samples, so that the top pressurizing hydraulic rod applies pressure to the top pressing plate through the distributed pressurizing plate, so that the top of the rock mass sample is uniformly stressed; S7: The side adjustment hydraulic rod is powered on and drives the moving block to linearly displace. Along with the linear displacement of the moving block, the two rotating connecting plates rotate around the axis to open and close, thereby driving the adjustment slider to linearly displace, so that the adjustment slider presses the adjustable side pressurizing plate against the side surface of the rock mass sample, and the adjustment slider slides along the outer surface of the adjustable side pressurizing plate; S8: Until the adjustment slider squeezes the end of the adjustable side pressurizing plate and fits the top pressing plate or the steel box. At this time, the side pressurizing hydraulic rod starts and drives the side squeezing plate to move; S9: The side squeezing plate applies extrusion to the adjustable side pressurizing plate, so that the splicing side plates inside the adjustable side pressurizing plate uniformly transfer the pressure to the side surface of the rock mass sample; S10: Mortar transfer pump: Finally, the mortar transfer pump transfers the mortar inside the mortar storage tank to the mortar perfusion pipe through the mortar transfer pipe. The mortar perfusion pipe perfuses the mortar into the gap between adjacent rock mass samples, and the ultra-high-speed camera takes pictures of the mortar flow between adjacent rock mass samples.

[0015] Compared with the prior art, the beneficial effects of the test method of the present invention are as follows: 1. By using the adjustable electric telescopic rod and the top pressurizing hydraulic rod to drive the lifting plate and the top pressing plate to move, the top pressing plate is made to fit the top of the rock mass sample. Then, according to the overall length of the rock mass sample, an appropriate number of top pressurizing hydraulic rods are selected to apply pressure to the distributed pressing plate and the top pressing plate, ensuring uniform force on the whole rock mass sample. Adjust according to the rock mass length after splicing of the rock mass samples, so as to adapt to different sizes of spliced rock mass samples for experimental use.

[0016] 2. By using the side adjustment hydraulic rod to push the moving block and the rotating connecting plate towards the rock mass sample, the two adjustment sliders squeeze the adjustable side pressing plate against the side of the rock mass sample, and the adjustment sliders slide along the outer surface of the adjustable side pressing plate, so that the adjustable side pressing plate fills the gap between the top pressing plate and the steel plate box. At this time, the adjustable side pressing plate completely closes the side of the rock mass sample. Adjust according to the rock mass width after splicing of the rock mass samples, so as to adapt to different sizes of spliced rock mass samples for experimental use. And by using the side pressurizing hydraulic rod to pressurize the side extrusion plate, the X-shaped side extrusion plate distributes the pressure evenly to the splicing side plates that are in contact with the rock mass sample inside the adjustable side pressing plate, so that the side of the spliced rock mass sample is uniformly stressed. Description of the Drawings

[0017] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the rear structural schematic diagram of the steel plate box of the present invention; Figure 3 is the structural schematic diagram of the axial pressurizing structure and the lateral pressurizing structure of the present invention; Figure 4 is the structural schematic diagram of the lifting plate of the present invention; Figure 5 is the internal structural schematic diagram of the lifting plate of the present invention; Figure 6 is the structural schematic diagram of the adjustable side pressing plate of the present invention; Figure 7 is the structural schematic diagram of the transparent observation plate of the present invention; Figure 8 is the structural schematic diagram of the rock mass contact transparent plate and the filling water bag of the present invention.

[0018] In the figure: 1. Steel plate box; 2. Ultra-high speed camera; 3. Electric telescopic rod for fixing the observation board; 4. Transparent observation board; 401. Transparent acrylic plate; 402. Water pipe; 403. Sealing groove; 404. Sealing airbag strip; 405. First air pipe; 406. First two-way air pump for sealing; 407. Water pump; 408. Rock contact transparent plate; 409. Filling water bag; 410. Storage groove; 5. Axial pressure structure; 501. Top fixing frame; 502. Adjusting electric telescopic rod; 503. Top pressure hydraulic rod; 504. Lifting plate; 505. Rectangular sealing airbag; 506. Top pressure plate; 507. Second two-way air pump for sealing; 508. Second air pipe; 509. Rectangular sealing groove; 510. Distributed pressure plate; 6. Lateral pressure structure; 601. Side fixing frame; 602. Sliding plate; 603. Side adjusting hydraulic rod; 604. Side pressure hydraulic rod; 605. Moving block; 606. Rotating connecting plate; 607. Side extrusion plate; 608. Adjusting slider; 609. Through groove; 610. Adjustable side pressure plate; 6101. Rubber outer sleeve; 6102. Spliced 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. Specific implementation mode

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0020] As Figure 1 and Figure 2 shown, a two-way loading fissured rock mass visualization splitting grouting test device includes a steel plate box 1 and an ultra-high speed camera 2. Four symmetrically located electric telescopic rods 3 for fixing the observation board are fixed inside the steel plate box 1. The movable ends of the four electric telescopic rods 3 for fixing the observation board are fixed with a transparent observation board 4. The ultra-high speed camera 2 is located directly in front of the transparent observation board 4. A plurality of spliced rock samples 11 are arranged between the transparent observation board 4 and the steel plate box 1. The mortar injection pipe 9 is inserted through the rear end of the steel plate box 1. The mortar injection pipe 9 is located at the splicing gap of the rock samples 11. The rear end of the mortar injection pipe 9 is fixed with a mortar delivery pipe 8. One end of the mortar delivery pipe 8 is connected to a mortar storage box 7. A mortar delivery pump 10 is arranged 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 mutually spliced rock samples 11 are pressed tightly from above and side by the axial pressure structure 5 and the lateral pressure structure 6. Then, mortar is injected into the gap between the mutually spliced rock samples 11 through the mortar injection pipe 9. The ultra-high speed camera 2 is used to photograph and record the flow of the mortar between the mutually spliced rock samples 11.

[0021] As Figure 1 , Figure 7 and Figure 8 shown, the transparent observation plate 4 includes a transparent acrylic plate 401. The transparent acrylic plate 401 is fixedly connected to the movable end of the electric telescopic rod 3 for fixing the observation plate. A storage groove 410 is provided on the surface of the transparent acrylic plate 401 facing the rock sample 11. A filled water bag 409 is provided inside the storage groove 410. A rock contact transparent plate 408 is provided between the filled water bag 409 and the rock sample 11. The surface area of the rock contact transparent plate 408 is larger than the surface area of the rock mass formed by the spliced rock samples 11. The front of the rock sample 11 is fixed by the transparent acrylic plate 401 and the rock contact transparent plate 408 to ensure that the rock sample 11 does not move forward and backward during the experiment.

[0022] Sealing grooves 403 are provided on the bottom surface of the transparent acrylic plate 401 and the side surface in contact with the steel box 1. A sealing airbag strip 404 is clamped inside the sealing grooves 403. A first air pipe 405 is fixed to one end of the sealing airbag strip 404. A first sealed two-way air pump 406 is fixed to the other end of the first air pipe 405. A water pipe 402 is fixed to one side of the filled water bag 409. The water pipe 402 penetrates through the transparent acrylic plate 401 and is connected to a water pump 407. The first sealed two-way air pump 406 conveys gas into the sealing airbag strip 404 through the first air pipe 405, causing the sealing airbag strip 404 to expand and seal the gap between the transparent acrylic plate 401 and the steel box 1, ensuring the overall sealing of the device during the experiment. Water is filled into the filled water bag 409 through the water pump 407 and the water pipe 402, causing the filled water bag 409 to expand and squeeze the rock contact transparent plate 408 towards the rock sample 11, making the pressure in front of the rock sample 11 uniform.

[0023] As Figures 3 to 5As shown, the axial pressure structure 5 includes a top fixing frame 501 fixed to the top of the steel plate box 1. The bottom surface of the top fixing frame 501 is fixed with an adjustable electric telescopic rod 502. On both sides of the adjustable electric telescopic rod 502, there are multiple top pressure hydraulic rods 503. The top pressure hydraulic rods 503 are fixed to the top fixing frame 501. The bottom end of the adjustable electric telescopic rod 502 is fixed with a lifting plate 504. Below the lifting plate 504, there is a top pressure plate 506. On the upper surface of the top pressure plate 506, there are multiple linearly distributed distributed pressure plates 510. The movable ends of the top pressure hydraulic rods 503 penetrate through the lifting plate 504 and are fixed to the distributed pressure plates 510. By using the adjustable electric telescopic rod 502 and the top pressure hydraulic rods 503 to drive the lifting plate 504 and the top pressure plate 506 to move, the top pressure plate 506 is made to fit the top of the rock mass sample 11. Then, an appropriate number of top pressure hydraulic rods 503 are selected according to the overall length of the rock mass sample 11 to apply pressure to the distributed pressure plates 510 and the top pressure plate 506, ensuring uniform force on the entire rock mass sample 11.

[0024] On the outside of the lifting plate 504, there is a rectangular sealing groove 509. Inside the rectangular sealing groove 509, there is a rectangular sealing airbag 505 clamped. One end of the rectangular sealing airbag 505 is connected through a second air pipe 508. 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. By using the second sealed two-way air pump 507 to transport gas into the rectangular sealing airbag 505 inside the rectangular sealing groove 509, the rectangular sealing airbag 505 expands and seals the gaps between the lifting plate 504 and the steel plate box 1, the rock mass contact transparent plate 408, and the transparent acrylic plate 401, ensuring that the mortar between the rock mass samples 11 does not leak during the experiment.

[0025] As Figure 3 and Figure 6As shown in the figure, the lateral pressure structure 6 includes a side fixing frame 601. The bottom end of the side fixing frame 601 is fixed to the side surface of the steel plate box 1. A sliding plate 602 is slidably installed on the outer side of the side fixing frame 601. A side adjusting hydraulic rod 603 is fixed to the outer surface of the sliding plate 602. A moving block 605 is fixed to the movable end of the side adjusting hydraulic rod 603. Rotating connecting plates 606 are rotatably installed at the top and bottom ends of the moving block 605 through rotating shafts. An adjusting slider 608 is rotatably installed at the end of the rotating connecting plate 606 close to the rock mass sample 11 through a rotating shaft. An adjustable side pressure plate 610 is provided between the two adjusting sliders 608 and the rock mass sample 11. By using the side adjusting hydraulic rod 603 to push the moving block 605 and the rotating connecting plate 606 to move towards the rock mass sample 11, the two adjusting sliders 608 squeeze the adjustable side pressure plate 610 against the side surface of the rock mass sample 11, and the adjusting 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 mass sample 11.

[0026] The adjustable side pressure plate 610 includes a rubber outer sleeve 6101. A plurality of splicing side plates 6102 are linearly arranged inside the rubber outer sleeve 6101. Rubber filling strips 6103 are filled between the splicing side plates 6102. The splicing side plates 6102 are connected by the rubber filling strips 6103, so that the whole adjustable side pressure plate 610 can be bent and can be adjusted according to the width of the rock mass after the rock mass samples 11 are spliced.

[0027] Two side extrusion plates 607 are provided between the two adjusting sliders 608. The side extrusion plates 607 are in an X shape. The side extrusion plates 607 are attached to 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 arranged up and down and are respectively located above and below the side adjusting hydraulic rod 603. 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. By using the side pressure hydraulic rod 604 to pressurize the side extrusion plate 607, the X-shaped side extrusion plate 607 evenly distributes the pressure to the splicing side plates 6102 that are attached to the rock mass sample 11 inside the adjustable side pressure plate 610, so that the side of the spliced rock mass sample 11 is uniformly stressed.

[0028] A test method for a two-way loading fractured rock mass visualization splitting grouting test device, the test method includes the following steps: S1: Cut the rock mass into multiple rock mass samples 11 with the same or different sizes according to the experimental needs, apply vaseline on the outer side of the rock mass samples 11, then splice the rock mass samples 11 together and place them inside the steel plate box 1; S2: Connect the power supply of the electric telescopic rod 3 for fixing the observation board and start it. The electric telescopic rod 3 for fixing the observation board pushes the transparent acrylic board 401 and the rock mass contact transparent board 408 to move, so that the rock mass contact transparent board 408 fits the front surface of the rock mass sample 11; S3: The first sealed two-way air pump 406 and the water pump 407 are powered on and started. The water pump 407 sends water into the filling water bag 409 through the water pipe 402, so that the rock mass contact transparent board 408 uniformly applies pressure to the rock mass sample 11 from the front; S4: The first sealed two-way air pump 406 sends gas into the inside of the sealed airbag strip 404 through the first air pipe 405, so that the sealed airbag strip 404 expands and seals the gap between the steel plate box 1 and the transparent acrylic board 401; S5: The adjusting electric telescopic rod 502 and the top pressurizing hydraulic rod 503 are simultaneously powered on and started. The adjusting electric telescopic rod 502 drives the lifting plate 504, and the top pressurizing hydraulic rod 503 drives the distributed pressurizing plate 510 and the top pressing plate 506 to move downward until the top pressing plate 506 contacts the upper surface of the rock mass sample 11; S6: Turn off the adjusting electric telescopic rod 502, and select an appropriate number of top pressurizing hydraulic rods 503 to start according to the length of the rock mass after splicing the rock mass samples 11, so that the top pressurizing hydraulic rods 503 apply pressure to the top pressing plate 506 through the distributed pressurizing plate 510, so that the top of the rock mass sample 11 is uniformly stressed; S7: The side adjusting hydraulic rod 603 is powered on and drives the moving block 605 to linearly displace. 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 adjusting slider 608 to linearly displace, so that the adjusting slider 608 presses the adjustable side pressurizing plate 610 against the side of the rock mass sample 11, and the adjusting slider 608 slides along the outer surface of the adjustable side pressurizing plate 610; S8: Until the adjusting slider 608 presses the end of the adjustable side pressurizing plate 610 and fits with the top pressing plate 506 or the steel plate box 1. At this time, the side pressurizing hydraulic rod 604 starts and drives the side pressing plate 607 to move; S9: The side pressing plate 607 applies extrusion to the adjustable side pressurizing plate 610, so that the splicing side plates 6102 inside the adjustable side pressurizing plate 610 uniformly transfer the pressure to the side of the rock mass sample 11; S10: Finally, the mortar transfer pump 10 transfers the mortar inside the mortar storage tank 7 to the mortar perfusion pipe 9 through the mortar transfer pipe 8. The mortar perfusion pipe 9 perfuses the mortar into the gap between adjacent rock samples 11, and the ultra-high-speed camera 2 takes pictures of the mortar flow between adjacent rock samples 11.

[0029] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A two-way loading visual splitting grouting test device for fractured rock mass, 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 the observation plate are fixed inside the steel plate box (1). The movable ends of the four electric telescopic rods (3) for fixing the observation plate are fixed with a transparent observation plate (4). The ultra-high-speed camera (2) is located directly in front of the transparent observation plate (4). A plurality of spliced rock samples (11) are arranged between the transparent observation plate (4) and the steel plate box (1). A mortar perfusion pipe (9) is inserted through the rear end of the steel plate box (1). The mortar perfusion pipe (9) is located at the splicing gap of the rock samples (11). The rear end of the mortar perfusion pipe (9) is fixed with a mortar delivery pipe (8). One end of the mortar delivery pipe (8) is connected to a mortar storage tank (7). A mortar delivery pump (10) is arranged between the mortar delivery pipe (8) and the mortar storage tank (7). An axial compression structure (5) is installed above the rock samples (11), and a lateral compression structure (6) is installed on one side of the rock samples (11).

2. The visualization splitting grouting test device for a two-way loading fractured rock mass according to claim 1, characterized in that: The axial compression structure (5) includes a top fixing frame (501) fixed to the top of the steel plate box (1). An adjusting electric telescopic rod (502) is fixed to the bottom surface of the top fixing frame (501). A plurality of top compression hydraulic rods (503) are arranged on both sides of the adjusting electric telescopic rod (502). The top compression hydraulic rods (503) are fixed to the top fixing frame (501). The bottom end of the adjusting electric telescopic rod (502) is fixed with a lifting plate (504). A top pressing plate (506) is arranged below the lifting plate (504). A plurality of linearly distributed distribution pressing plates (510) are fixed to the upper surface of the top pressing plate (506). The movable ends of the top compression hydraulic rods (503) penetrate through the lifting plate (504) and are fixed to the distribution pressing plates (510).

3. The visualization splitting grouting test device for a two-way loading fractured rock mass according to claim 2, wherein: A rectangular sealing groove (509) is arranged outside the lifting plate (504). A rectangular sealing airbag (505) is clamped inside the rectangular sealing groove (509). One end of the rectangular sealing airbag (505) is connected through a second air pipe (508). 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 to the upper surface of the lifting plate (504).

4. The visualization splitting grouting test device for two-way loaded fractured rock mass according to claim 3, characterized in that: The lateral compression structure (6) includes a side fixing frame (601). The bottom end of the side fixing frame (601) is fixed to the side of the steel plate box (1). A sliding plate (602) is slidably installed on the outside of the side fixing frame (601). A side adjusting hydraulic rod (603) is fixed to the outer surface of the sliding plate (602). The movable end of the side adjusting hydraulic rod (603) is fixed with a moving block (605). The top and bottom ends of the moving block (605) are rotatably installed with rotating connecting plates (606) through rotating shafts. 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. An adjustable side pressing plate (610) is arranged between the two adjusting sliders (608) and the rock sample (11).

5. The visualization splitting grouting test device for a two-way loading fractured rock mass according to claim 4, characterized in that: The adjustable lateral compression plate (610) includes a rubber outer sleeve (6101), and a plurality of spliced side plates (6102) are linearly arranged inside the rubber outer sleeve (6101). A rubber filling strip (6103) is filled between the spliced side plates (6102).

6. The visual splitting grouting test device for two-way loading fractured rock mass according to claim 5, wherein: There are two lateral extrusion plates (607) between the two adjustment sliders (608). The lateral extrusion plate (607) is in an X shape. The lateral extrusion plate (607) fits the outer surface of the adjustable lateral compression plate (610). Two lateral compression hydraulic rods (604) are also fixed on the outer surface of the sliding plate (602).

7. A two-way loading fissured rock mass visualization splitting grouting test device according to claim 6, characterized in that: The two lateral compression hydraulic rods (604) are symmetrically arranged up and down and are respectively located above and below the lateral adjustment hydraulic rod (603). A through groove (609) is provided through the surface of the rotary connection plate (606). The movable end of the lateral compression hydraulic rod (604) passes through the through groove (609) and is fixed to the lateral extrusion plate (607).

8. The visualization splitting grouting test device for two-way loaded fractured rock mass according to claim 7, characterized in that: The transparent observation plate (4) includes a transparent acrylic plate (401). The movable end of the electric telescopic rod (3) for fixing the observation plate is fixed to the transparent acrylic plate (401). A storage groove (410) is provided on the surface of the transparent acrylic plate (401) facing the rock sample (11). A filling water bag (409) is provided inside the storage groove (410). 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 surface area of the rock mass formed by the spliced rock samples (11).

9. The visualization splitting grouting test device for two-way loading fractured rock mass according to claim 8, wherein: Sealing grooves (403) are provided on the bottom surface of the transparent acrylic plate (401) and the side surface in contact with the steel box (1). A sealing airbag strip (404) is clamped inside the sealing grooves (403). 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). A water pipe (402) is fixed to one side of the filling water bag (409). The water pipe (402) passes through the transparent acrylic plate (401) and is connected to a water pump (407).

10. The test method of a two-way loading fissured rock mass visualization splitting grouting test device according to claim 9, characterized in that: The test method includes the following steps: S1: Cut the rock mass into a plurality of rock samples (11) with the same or different sizes according to the experimental needs, 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: Connect the power supply of the electric telescopic rod (3) for fixing the observation plate and start it. 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) fits the front surface of the rock sample (11). S3: The first sealed two-way air pump (406) and the water pump (407) are powered on and started. The water pump (407) sends water into the filling water bag (409) through the water pipe (402), so that the rock contact transparent plate (408) uniformly applies pressure to the rock sample (11) from the front. S4: The first sealed two-way air pump (406) sends 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 plate box (1) and the transparent acrylic plate (401); S5: The adjustable electric telescopic rod (502) and the top pressurizing hydraulic rod (503) are simultaneously powered on and started. The adjustable electric telescopic rod (502) drives the lifting plate (504) downward, and the top pressurizing hydraulic rod (503) drives the distributed pressurizing plate (510) and the top pressing plate (506) downward until the top pressing plate (506) contacts the upper surface of the rock sample (11); S6: The adjustable electric telescopic rod (502) is turned off, and an appropriate number of top pressurizing hydraulic rods (503) are selected and started according to the length of the rock mass after the rock samples (11) are spliced, so that the top pressurizing hydraulic rods (503) apply pressure to the top pressing plate (506) through the distributed pressurizing plate (510), making the top of the rock sample (11) receive uniform force; S7: The side-adjusting hydraulic rod (603) is powered on and drives the moving block (605) to linearly displace. 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 adjusting slider (608) to linearly displace, so that the adjusting slider (608) presses the adjustable side pressurizing plate (610) against the side of the rock sample (11), and the adjusting slider (608) slides along the outer surface of the adjustable side pressurizing plate (610); S8: Until the adjusting slider (608) presses the end of the adjustable side pressurizing plate (610) and fits with the top pressing plate (506) or the steel plate box (1). At this time, the side pressurizing hydraulic rod (604) is started and drives the side pressing plate (607) to move; S9: The side pressing plate (607) applies extrusion to the adjustable side pressurizing plate (610), so that the splicing side plates (6102) inside the adjustable side pressurizing plate (610) uniformly transfer the pressure to the side of the rock sample (11); S10: Finally, the mortar delivery pump (10) delivers the mortar inside the mortar storage tank (7) to the mortar perfusion pipe (9) through the mortar delivery pipe (8). The mortar perfusion pipe (9) perfuses the mortar into the gap between adjacent rock samples (11), and the ultra-high-speed camera (2) takes pictures of the mortar flow between adjacent rock samples (11).

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