A visualized microbial infusion device with microcracks in structural surfaces

Abstract

This invention discloses a visualization device for the entire process of microbial infusion in structural surface microfractures, comprising: an aluminum profile frame with a transparent plate mounted on its outer surface; two sets of load-bearing frames symmetrically arranged within the aluminum profile frame, each load-bearing frame including a first load-bearing plate and a second load-bearing plate; a rock mass structural surface sample placed between the first and second load-bearing plates; a waste liquid recovery assembly detachably located at the bottom of the aluminum profile frame; an infusion system including a liquid supply unit, a pipeline unit, an injection needle, and a peristaltic pump; a pressure detection module mounted on the pipeline unit; and a control system for controlling the overall operation of the device. This invention solves the problem that traditional infusion devices cannot intuitively capture the dynamic process of microbial infusion in structural surfaces, providing intuitive support for the accurate recording and analysis of experimental data.

Description

Technical Field

[0001] This invention relates to the field of indoor shear testing technology for microbial reinforcement of rock mass structural surfaces, and in particular to a visualized microbial infusion device for the entire process of microbial infusion into micro-fractures in structural surfaces. Background Technology

[0002] Structural planes (such as faults, joints, and fissures) are weak points in rock masses, and shear instability along these planes is a major cause of engineering disasters such as slope collapse and dam failure. Therefore, improving the shear strength of structural planes is crucial for enhancing the overall stability of rock masses. In recent years, microbial induced carbonate deposition (MICP) technology, as a green reinforcement method, has been widely used to improve the mechanical properties of structural planes. Existing studies have shown that by injecting bacterial solutions and cementing solutions into rock fissures, calcium carbonate crystals are precipitated in situ within the fissures, thereby improving the shear resistance of structural planes. Liu et al. conducted MICP reinforcement tests on microfractures in natural rock masses and performed shear tests, finding that the peak shear strength of the samples increased with the extension of reinforcement time. Dong et al. further explored the effect of cementing solution concentration, showing that the shear strength increased with increasing cementing solution concentration. The shear mechanical properties of structural planes after MICP reinforcement have become a focus of current experimental research, and the degree of calcium carbonate filling in the fissures directly reflects the cementing effect and is a key factor controlling the shear strength of structural planes. However, the shear properties of structural surfaces exhibit a significant size effect, making it difficult to directly extrapolate the mechanical parameters obtained from small-sized specimens to engineering scales. Existing studies mostly utilize small-sized specimens with simple structural morphologies, lacking a systematic investigation of the shear properties and size effect characteristics of structural surfaces of different sizes under MIP reinforcement conditions, thus failing to provide effective support for the reinforcement design of large-scale structural surfaces. Furthermore, existing testing devices also have shortcomings in terms of fixation and injection functions. On the one hand, most are constructed using metal or opaque materials, making it difficult to achieve visual monitoring of grout flow and sedimentation processes within the fractures; on the other hand, the devices generally lack automatic detection and control functions for injection pressure, easily leading to problems such as local over-injection and uneven injection, affecting the accuracy and repeatability of the test results. In addition, most existing devices are designed for single-sized specimens, making it difficult to flexibly adjust them according to different structural surface sizes and fracture openings, limiting their applicability.

[0003] Based on the above-mentioned technical problems, the present invention provides a visualization device for the whole process of microbial infusion in structural microcracks, which provides technical support for the optimization of microbial reinforcement mechanism and infusion process. Summary of the Invention

[0004] The purpose of this invention is to provide a visualized infusion device for microorganisms through microcracks in structural surfaces, in order to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following solution: The present invention provides a visualization device for the entire process of microbial infusion through structural micro-cracks, comprising: An aluminum profile frame, wherein the aluminum profile frame is a rectangular cube structure, and a transparent plate is installed on the outer side of the aluminum profile frame; The load-bearing frame is provided in two sets, and the two sets of load-bearing frames are symmetrically arranged in the aluminum profile frame. The load-bearing frame includes a first load-bearing plate and a second load-bearing plate. The first load-bearing plate and the second load-bearing plate are arranged in a Y-shape. The length of the first load-bearing plate is less than the length of the second load-bearing plate, and there is a gap between the first load-bearing plate and the second load-bearing plate. A rock mass structural surface sample is placed between the first load-bearing plate and the second load-bearing plate, and a filter layer is covered at the bottom of the rock mass structural surface sample. Waste liquid recovery assembly, wherein the waste liquid recovery assembly is detachable at the bottom of the aluminum profile frame and is arranged corresponding to the bottom of the second load-bearing plate; The infusion system includes a liquid supply unit, a pipeline unit, an injection needle, and a peristaltic pump. The liquid supply unit is installed at one end of the aluminum profile frame. The injection needle is connected to the liquid supply unit through the pipeline unit. The injection needle is positioned at the fracture entrance of the rock mass structural surface sample. The peristaltic pump is installed on the pipeline unit. A pressure detection module is installed on the pipeline unit; A control system is used to control the operation of the overall device.

[0006] According to the present invention, a storage rack is installed inside the aluminum profile frame of the micro-crack microbial whole-process visualization infusion device, and the liquid supply unit is installed on the storage rack.

[0007] According to the present invention, the microbial whole-process visualization perfusion device for structural surface microcracks includes a liquid supply unit comprising a sterile liquid supply tank, a microbial solution bottle and a cementing solution bottle. The sterile liquid supply tank is placed on the shelf, and the microbial solution bottle and the cementing solution bottle are both installed inside the sterile liquid supply tank.

[0008] According to the present invention, the micro-crack microbial whole-process visualization infusion device provided by the present invention includes a waste liquid recovery component including a waste liquid tank, which is detachably connected to the bottom of the aluminum profile frame and is arranged corresponding to the bottom position of the second load-bearing plate.

[0009] According to the present invention, the structure surface microcrack microbial whole process visualization infusion device includes a pipeline unit comprising a main pipeline and branch pipelines. The main pipeline is connected to the microbial solution bottle and the cementing solution bottle through a connecting pipe. Several groups of branch pipelines are provided, and each group of branch pipelines is connected to the main pipeline. The ends of the branch pipelines are respectively equipped with injection needles, and control valves are installed on the branch pipelines.

[0010] According to the present invention, the structural microcrack microbial whole-process visualization infusion device includes a pressure detection module comprising a pressure sensor, which is installed on the main pipeline.

[0011] According to the present invention, the microbial whole-process visualization infusion device for structural surface microfractures is provided, wherein the filter layer is a strip filter paper, the width of the strip filter paper is 10-20 mm, and the length is the sum of the two adjacent edges of the bottom of the rock mass structural surface sample.

[0012] According to the present invention, the microbial whole-process visualization infusion device for structural surface microfractures is provided, wherein the injection needle is fixed on the rock mass structural surface sample by waterproof tape.

[0013] The present invention discloses the following technical effects: The device uses a rectangular cubic aluminum profile frame with a transparent plate installed on the outer side. Combined with the placement angle of the rock mass structural surface sample, the staff can observe the entire grouting process through the transparent plate, which provides intuitive support for the accurate recording and analysis of experimental data and greatly improves the comprehensiveness and accuracy of experimental observation.

[0014] Two sets of symmetrically arranged Y-shaped support frames, with first and second support plates of different lengths and spacing design, can stably place rock mass surface samples and avoid sample displacement during the experiment; the bottom filter layer can prevent calcium carbonate precipitation and loss; the pressure detection module and control system work together to adjust the infusion pressure and flow rate in real time, ensuring the stability of the infusion process and improving the repeatability and reliability of the experimental results.

[0015] The device features a modular design for each component, allowing for flexible adjustment of the pipeline units and injection needles in the infusion system to adapt to rock mass structural surface samples of different sizes and fracture characteristics. The waste liquid recovery component is detachable, and the liquid supply unit is easy to install, reducing the difficulty of experimental operation. The control system enables automated control of the entire device, reducing human error. It can be widely used in experimental research related to microbial reinforcement of micro-fractures in rock mass structural surfaces, providing reliable device support for experiments in related fields. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic isometric view of the 100mm×100mm×100mm rock structure surface reinforcement device of the present invention. Figure I ; Figure 2 This is a schematic isometric view of the 100mm×100mm×100mm rock structure surface reinforcement device of the present invention. Figure II ; Figure 3 This is a schematic isometric view of the 100mm×100mm×100mm rock structure surface reinforcement device of the present invention. Figure III ; Figure 4 This is a front view schematic diagram of the 100mm×100mm×100mm rock structure surface reinforcement device of the present invention; Figure 5 This is a right-side schematic diagram of the 100mm×100mm×100mm rock structure surface reinforcement device of the present invention; Figure 6 This is a left-side schematic diagram of the 100mm×100mm×100mm rock structure surface reinforcement device of the present invention; Figure 7 This is a top view schematic diagram of the 100mm×100mm×100mm rock structure surface reinforcement device of the present invention; Figure 8 This is a front view schematic diagram of the side panel of the present invention; Figure 9 This is a front view schematic diagram of the second load-bearing plate of the present invention; Figure 10 This is a front view schematic diagram of the first load-bearing plate of the present invention; Figure 11 This is a front view schematic diagram of the load-bearing plate 7 of the side shelf of the present invention; Figure 12 This is an isometric view of the aluminum profile frame of the present invention; Figure 13 This is a front view of the aluminum profile frame of the present invention; Figure 14 This is a right-side schematic diagram of the aluminum profile frame of the present invention; Figure 15 This is a top view of the aluminum profile frame of the present invention; Figure 16 This is a front view schematic diagram of the detachable waste liquid tank of the present invention; Figure 17 This is a schematic cross-sectional view of the detachable waste liquid tank of the present invention; Figure 18 This is a top view schematic diagram of the detachable waste liquid tank of the present invention; Figure 19 This is a schematic diagram of the present invention with 100mm and 200mm sized samples loaded. Figure 20 This is a schematic diagram of the 300mm and 400mm specimens loaded in this invention; Figure 21 This is a schematic diagram showing the distribution of grouting points for samples of different sizes according to the present invention.

[0018] The components include: 1. Aluminum profile frame; 2. Transparent plate; 3. Second load-bearing plate; 4. First load-bearing plate; 5. Waste liquid tank; 6. Injection needle; 7. Shelf; 8. Piping unit; 9. Pressure gauge; 10. Sterile supply tank; 11. Peristaltic pump; 12. Microbial solution bottle; 13. Cementing solution bottle; and 14. Rock mass structural surface sample. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Reference Figures 1-21 This invention provides a visualization device for the entire process of microbial infusion through structural micro-cracks, comprising: Aluminum profile frame 1, which is a rectangular cube structure, has a transparent plate 2 installed on its outer side; The load-bearing frame is provided in two sets, which are symmetrically arranged in the aluminum profile frame 1. The load-bearing frame includes a first load-bearing plate 4 and a second load-bearing plate 3. The first load-bearing plate 4 and the second load-bearing plate 3 are arranged in a Y-shaped structure. The length of the first load-bearing plate 4 is less than the length of the second load-bearing plate 3, and there is a gap between the first load-bearing plate 4 and the second load-bearing plate 3. Rock mass structure surface sample 14 is placed between the first load-bearing plate 4 and the second load-bearing plate 3, and the bottom of the rock mass structure surface sample 14 is covered with a filter layer. Waste liquid recovery component, which is detachable at the bottom of aluminum profile frame 1 and is arranged corresponding to the bottom of the second load-bearing plate 3; The infusion system includes a liquid supply unit, a pipeline unit 8, an injection needle 6, and a peristaltic pump 11. The liquid supply unit is installed at one end of the aluminum profile frame 1. The injection needle 6 is connected to the liquid supply unit through the pipeline unit 8. The injection needle 6 is placed at the fracture entrance of the rock mass structural surface sample 14. The peristaltic pump 11 is installed on the pipeline unit 8. Pressure detection module, which is installed on piping unit 8; The control system is used to control the operation of the overall device.

[0022] Before the experiment, the device was debugged and the sample was arranged: the rock mass structural surface sample 14 was placed between the first and second load-bearing plates 3 of the two sets of symmetrical load-bearing frames. A filter layer was laid at the bottom of the sample to intercept impurities and prevent crack blockage. Then, the waste liquid recovery component was detachably installed at the bottom of the aluminum profile frame 1 and positioned by aligning it with the bottom of the second load-bearing plate 3. The transparent plate 2 on the outer side of the aluminum profile frame 1 was checked to ensure that the visualization was unobstructed. Then, the liquid supply unit was installed inside one end of the aluminum profile frame 1. The liquid supply unit was connected to the injection needle 6 through the pipeline unit 8. The injection needle 6 was precisely aligned with the crack entrance of the rock mass structural surface sample 14. After ensuring that the pipeline was well sealed, the peristaltic pump 11 and the pressure detection module were installed in the designated positions of the pipeline unit 8. Finally, the control system was started to complete the parameter debugging of the entire device. After the experiment started, the control system controlled the peristaltic pump 11 to operate. The microbial infusion solution in the supply unit was transported through the pipeline unit 8. Under the power of the peristaltic pump 11, it was slowly injected into the micro-fracture inlet of the rock mass structural surface sample 14 through the injection needle 6. The pressure detection module monitored the infusion pressure in the pipeline in real time and fed the data back to the control system. The staff observed the infusion process throughout through the transparent plate 2. During the infusion process, the bottom filter layer prevented the loss of calcium carbonate precipitation. Excess waste liquid permeated through the filter layer and flowed into the corresponding waste liquid recovery component at the bottom. During the experiment, the control system could adjust the speed of the peristaltic pump 11 in real time according to the pressure detection data to control the infusion flow rate and pressure, ensuring that the infusion process was stable and controllable. After the experiment, the control system was turned off, the waste liquid recovery component was disassembled to treat the waste liquid, and the sample was taken out for subsequent analysis, completing the entire microbial infusion experiment.

[0023] The design was further optimized by installing a shelf 7 inside the aluminum profile frame 1, with the liquid supply unit installed on the shelf 7.

[0024] The solution is further optimized so that the liquid supply unit includes a sterile liquid supply box 10, a microbial solution bottle 12 and a cementing solution bottle 13. The sterile liquid supply box 10 is placed on the shelf 7, and the microbial solution bottle 12 and the cementing solution bottle 13 are both installed inside the sterile liquid supply box 10.

[0025] Further optimization of the scheme: the waste liquid recycling component includes a waste liquid tank 5, which is detachably connected to the bottom of the aluminum profile frame 1 and is arranged corresponding to the bottom position of the second load-bearing plate 3.

[0026] Further optimization of the scheme: Piping unit 8 includes a main pipe and branch pipes. The main pipe is connected to the microbial solution bottle 12 and the cementing solution bottle 13 through connecting pipes. Several sets of branch pipes are set, and each set of branch pipes is connected to the main pipe. Injection needles 6 are installed at the ends of the branch pipes respectively, and control valves are installed on the branch pipes.

[0027] The design has been further optimized, with the pressure detection module including a pressure sensor installed on the main pipeline.

[0028] The scheme was further optimized by using strip-shaped filter paper as the filter layer. The width of the strip-shaped filter paper was 10-20 mm, and the length was the sum of the two adjacent edges at the bottom of the rock mass structural surface sample 14.

[0029] The scheme was further optimized by placing the rock mass structural surface sample between the first and second load-bearing plates, and fixing the injection needle 6 to the rock mass structural surface sample 14 with waterproof tape.

[0030] For rock mass structural surface sample 14, measuring 100mm × 100mm × 100mm, the procedure is as follows: 1. Device Assembly: First, assemble the aluminum profile frame 1, ensuring its stability. Install a transparent plate 2 on the outer side of the frame to ensure unobstructed visual observation. Fix the shelf 7 inside one end of the aluminum profile frame 1, and fix the aseptic supply tank 10 on the shelf 7. Then, place the microbial solution bottle 12 and the cementing solution bottle 13 into the aseptic supply tank 10 to complete the installation of the supply unit. Arrange two sets of Y-shaped load-bearing frames symmetrically inside the aluminum profile frame 1, ensuring that the first load-bearing plate 4 (short plate) and the second load-bearing plate 3 (long plate) are reasonably spaced. Then, install the detachable waste liquid tank 5 at the bottom of the aluminum profile frame 1, aligning it with the bottom of the second load-bearing plate 3 to ensure that the waste liquid can flow in smoothly.

[0031] 2. Sample Preparation and Fixation: Cut strips of filter paper as the filter layer, with a width of 15mm (within the range of 10-20mm) and a length of 200mm (100mm + 100mm, i.e., the sum of the two adjacent edges of the bottom of the sample). Attach the strips of filter paper along the two adjacent edges of the bottom of the sample, then wrap waterproof tape around the sample to cover the bottom edge of the sample, leaving only appropriate openings where the filter paper overlaps with the crack to achieve sealing and drainage. Place the treated sample between the first and second load-bearing plates 3 of the two sets of Y-shaped load-bearing frames.

[0032] 3. Piping and Testing System Setup: Piping unit 8 uses a combination of main and branch pipes. The main pipe is connected to the microbial solution bottle 12 and the cementing solution bottle 13 in the sterile supply tank 10 via connecting pipes. A pressure sensor (pressure detection module) and a peristaltic pump 11 are installed on the main pipe. Two sets of branch pipes are set up (corresponding to two grouting points of the sample), both connected to the main pipe. An injection needle 6 is installed at the end of each branch pipe, and a control valve is installed on the branch pipe. The injection needle 6 is inserted into the sample crack entrance through the waterproof tape, with the needle tip slightly penetrating the crack by 1-3 mm. The needle is then fixed a second time with waterproof tape to ensure sealing and stability.

[0033] 4. Parameter Setting and Experimental Operation: Experimental parameters were set through the control system. The single-channel flow rate of peristaltic pump 11 was set to 0.6 mL / min (within the range of 0.5–5.0 mL / min), and the upper limit threshold pressure of the pressure sensor was set to 0.10 MPa (within the range of 0.02–0.20 MPa). When the actual pressure reached the threshold, the control system automatically activated the peristaltic pump 11 to reduce its speed or stop. Before formal operation, a short-term trial run of 1.5 min was conducted with sterile water to check the pipeline sealing, pressure response, and waste liquid drainage. After confirming that there were no abnormalities, the sterile water was drained. The control system was started, and peristaltic pump 11 began to operate. The microbial solution and cementing solution were simultaneously injected into the sample fissures through the main pipeline, branch pipelines, and injection needle 6. The pressure sensor monitored the pressure of the main pipeline in real time and fed back the data. The staff observed the permeation and diffusion process of the infusion solution through the transparent plate 2. Excess waste liquid was filtered through strip filter paper and flowed into the waste liquid tank 5.

[0034] 5. End of experiment: After the infusion is completed according to the set time, the control system shuts down the peristaltic pump 11, disassembles the waste liquid tank 5 to dispose of the waste liquid, removes the waterproof tape and injection needle 6, takes out the sample for subsequent analysis, disassembles and cleans the device components, and the experiment is completed.

[0035] For specimens of 100mm and 200mm size, a conventional installation method with two rows of "Y"-shaped partitions is preferred. In this arrangement, the load-bearing long plate 3 and the load-bearing short plate 4 form two opposing inclined partitions, each of which can serve as a placement area for one row of specimens. When the sample size is 100×100×100mm, 6 samples can be placed in a single row; When the sample size is 200×200×200mm, three samples can be placed in a single row.

[0036] For larger samples of 300mm and 400mm in size, the entire device can be flipped over, so that the original two load-bearing long plates 3 form an upward-facing "V"-shaped single-row partition (see...). Figure 20 ), used to support large-sized specimens: When the sample size is 300×300×300mm, two samples can be placed in a "V" shaped single-row partition; When the sample size is 400×400×400mm, one sample can be placed in a single "V" shaped single-row partition.

[0037] Figure 19 The illustration shows typical arrangements for loading 100mm and 200mm specimens. Figure 20 The diagram illustrates the optional arrangement schemes for loading 300mm and 400mm sized specimens (the appropriate scheme should be selected according to the specimen size in actual use).

[0038] 2. Matching the dimensions of the filter paper and adhesive tape for flow guidance and sealing. All specimens of various sizes use the same "filter paper 16 + waterproof tape 15" sealing scheme as the 100mm specimen. The length of the strip filter paper 16 is preferably the sum of the lengths of the two adjacent sides at the bottom of the specimen, approximately twice the side length of the specimen. The width is preferably 10–30mm, which can be fine-tuned according to the crack opening and outflow requirements. For example: 200mm sample: filter paper length 400mm; 300mm sample: filter paper length 600mm; 400mm sample: filter paper length 800mm.

[0039] The wrapping and opening method of the waterproof tape 15 is the same as that of the 100mm sample, except that the grouting port on the upper side of the structural surface is retained, while the rest of the boundary is kept sealed.

[0040] 3. Number and location of grouting points To accommodate the reinforcement needs of structural surfaces of different sizes, this invention arranges several grouting points on the upper side of the structural surface according to the principle of "points distributed at equal intervals on the upper side" (see...). Figure 21 Using the upper side edge of the structural surface as a reference, the preferred number and location of grouting points for each size of sample are as follows: 100mm: One grouting point on each side, the side is divided into two equal sections, and the grouting point is placed at the 1 / 2 point (a total of 2 grouting points, symmetrical on the left and right). 200mm: 2 grouting points on each side, the side is divided into 3 equal sections, and the points are arranged at 1 / 3 and 2 / 3 (a total of 4 grouting points, symmetrical on the left and right).

[0041] 300mm: 3 grouting points on each side, the side is divided into 4 equal sections, and the grouting points are arranged at 1 / 4, 2 / 4 and 3 / 4 (a total of 6 grouting points, symmetrical from left to right).

[0042] 400mm: 4 grouting points on each side, the side is divided into 5 equal sections, and the grouting points are arranged at 1 / 5, 2 / 5, 3 / 5 and 4 / 5 (a total of 8 grouting points, symmetrical from left to right).

[0043] Each grouting point uses an injection needle 6 as the grouting end. The needle tip contacts or is inserted lightly into the fissure channel for about 1-3 mm. Waterproof tape 15 is used to reinforce the needle to maintain the stability of the needle position and the sealing of the injection site.

[0044] 4. Scale matching between fluid supply and pressure control The injection pressure control strategy for each size of sample is the same as that for the 100mm sample. That is, the upper limit threshold of the injection pressure is determined by the pressure sensor 9 (recommended range of 0.02 to 0.20 MPa). When the pressure reaches the threshold, the control unit automatically controls the peristaltic pump 11 to stop or reduce its speed, thereby realizing closed-loop control of the injection pressure.

[0045] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0046] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A visualized microbial infusion device with micro-cracks in structural surfaces, characterized in that, include: An aluminum profile frame (1) is a rectangular cube structure, and a transparent plate (2) is installed on the outer side of the aluminum profile frame (1). The load-bearing frame is provided in two sets, and the two sets of load-bearing frames are symmetrically arranged in the aluminum profile frame (1). The load-bearing frame includes a first load-bearing plate (4) and a second load-bearing plate (3). The first load-bearing plate (4) and the second load-bearing plate (3) are arranged in a Y-shape. The length of the first load-bearing plate (4) is less than the length of the second load-bearing plate (3), and there is a gap between the first load-bearing plate (4) and the second load-bearing plate (3). Rock mass structure surface sample (14) is placed between the first load-bearing plate (4) and the second load-bearing plate (3), and the bottom of the rock mass structure surface sample (14) is covered with a filter layer. Waste liquid recycling component, wherein the waste liquid recycling component is detachable at the bottom of the aluminum profile frame (1) and is arranged corresponding to the bottom of the second load-bearing plate (3); The infusion system includes a liquid supply unit, a pipeline unit (8), an injection needle (6), and a peristaltic pump (11). The liquid supply unit is installed at one end of the aluminum profile frame (1). The injection needle (6) is connected to the liquid supply unit through the pipeline unit (8). The injection needle (6) is placed at the fracture entrance of the rock mass structural surface sample (14). The peristaltic pump (11) is installed on the pipeline unit (8). A pressure detection module is installed on the pipeline unit (8); A control system is used to control the operation of the overall device.

2. The structural microfissure microbial whole-process visualization infusion device according to claim 1, characterized in that, A shelf (7) is installed inside the aluminum profile frame (1), and the liquid supply unit is installed on the shelf (7).

3. The structural microfissure microbial whole-process visualization infusion device according to claim 2, characterized in that, The liquid supply unit includes a sterile liquid supply box (10), a microbial solution bottle (12) and a cementing solution bottle (13). The sterile liquid supply box (10) is placed on the shelf (7), and the microbial solution bottle (12) and the cementing solution bottle (13) are both installed inside the sterile liquid supply box (10).

4. The structural microfissure microbial whole-process visualization infusion device according to claim 1, characterized in that, The waste liquid recycling component includes a waste liquid tank (5), which is detachably connected to the bottom of the aluminum profile frame (1) and is arranged corresponding to the bottom position of the second load-bearing plate (3).

5. The structural microfissure microbial whole-process visualization infusion device according to claim 3, characterized in that, The pipeline unit (8) includes a main pipeline and branch pipelines. The main pipeline is connected to the microbial solution bottle (12) and the cementing solution bottle (13) through a connecting pipe. Several sets of branch pipelines are provided, and each set of branch pipelines is connected to the main pipeline. The ends of each set of branch pipelines are respectively equipped with the injection needle (6), and a control valve is installed on the branch pipeline.

6. The structural microfissure microbial whole-process visualization infusion device according to claim 5, characterized in that, The pressure detection module includes a pressure sensor, which is installed on the main pipeline.

7. The structural microfissure microbial whole-process visualization infusion device according to claim 1, characterized in that, The filter layer is a strip filter paper with a width of 10-20 mm and a length equal to the sum of the two adjacent edges at the bottom of the rock mass structure surface sample (14).

8. The structural microfissure microbial whole-process visualization infusion device according to claim 1, characterized in that, The injection needle (6) is fixed to the rock mass structural surface sample (14) by waterproof tape.

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