Slope reinforcing device and method based on microbial mineralization

Abstract

The invention relates to the technical field of side slope treatment, in particular to a side slope reinforcing device and method based on microbial mineralization, which comprises a bracket, and the bracket is provided with a liquid injection assembly for injecting a bacterial liquid and a cementing liquid, a temperature measurement assembly for detecting temperature and a receiving assembly for receiving the bacterial liquid and the cementing liquid. The liquid injection assembly comprises a controller and a plurality of liquid injection pieces used for conveying liquid, and the controller is used for controlling the liquid injection pieces to operate. The output end of the liquid injection part is communicated with a plurality of bacterium injection needle heads for conveying bacterium liquid and a plurality of grouting needle heads for conveying cementing liquid, flow regulating valves are arranged at the communicating positions of the bacterium injection needle heads and the liquid injection part and the communicating positions of the grouting needle heads and the liquid injection part, and the input end of the liquid injection part is communicated with a liquid storage barrel; the liquid injection pieces are fixedly connected to the outer side walls of the lower portions of the liquid storage barrels, and openings are formed in the tops of the liquid storage barrels. The flow of the bacterial liquid and the cementing liquid is adjusted according to real-time temperature feedback, so that microorganisms are maintained to react at the optimal working temperature, and the mineralization effect and the soil reinforcement quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of slope management, and in particular to a slope reinforcement device and method based on microbial mineralization. Background Art

[0002] The slope reinforcement technology based on microbial mineralization (MICP) mainly uses specific microorganisms to promote calcium carbonate precipitation under suitable conditions, thereby enhancing the bonding force between soil particles and improving the stability of the soil. Commonly used microorganisms mainly include urea-decomposing bacteria (such as Bacillus and Pseudomonas), which can hydrolyze urea into ammonia and carbon dioxide through metabolic processes.

[0003] The ammonia produced by urea hydrolysis will dissolve in water to form ammonium ions, which will increase the pH value of the solution and increase the concentration of OH- ions in the extracellular solution. The hydrolysis equilibrium is towards the production of The solution moves in the direction of At the same time, the negatively charged ionic groups (such as hydroxyl groups, amino groups, etc.) outside the cells absorb Ca in the solution. 2+ Mg 2+ ions; these ions Combined with calcium carbonate, mineralization and deposition occur on the surface of soil particles to form calcium carbonate (CaCO3). With the continuous deposition of calcium carbonate (CaCO3), the pores between slope soil particles are filled, and the soil changes from a loose state to an integral structure, which not only improves the mechanical properties of the soil, but also significantly reduces its permeability.

[0004] In the prior art, grouting is usually used to continuously inject bacterial liquid and cementing liquid into the soil, and this method has some limitations. Specifically, in actual applications, the injection volume, speed and distribution of bacterial liquid and cementing liquid may be affected by many factors; therefore, it is necessary to adjust the injection parameters in real time to ensure that the bacterial liquid and cementing liquid work effectively. In particular, when injecting bacterial liquid and cementing liquid into slopes, due to the special terrain structure of the slope, it is difficult for the bacterial liquid and cementing liquid to work evenly and effectively, which poses new challenges to the real-time adjustment of the injection parameters of the bacterial liquid and cementing liquid. However, the existing method of continuous injection of bacterial liquid often makes it difficult to achieve real-time adjustment and optimization of the injection parameters of the bacterial liquid and cementing liquid, which limits its application effect to a certain extent.

[0005] In summary, how to solve the problem that it is difficult to adjust the injection parameters of the bacterial solution and the cementing solution in real time during the continuous injection of the existing bacterial solution, resulting in poor slope reinforcement effect, has become a difficult problem that needs to be solved urgently in this field. Therefore, it is necessary to propose a slope reinforcement device and method based on microbial mineralization. Summary of the invention

[0006] To solve the above problems, the present invention provides a slope reinforcement device and method based on microbial mineralization. Through the cooperation of a temperature sensor and a flow control valve, the flow of the bacterial solution and the binder is adjusted according to real-time temperature feedback, and the injection amount of the bacterial solution and the binder is adjusted based on the receiving situation of the receiving component, so that the bacterial solution and the binder can accurately act on the soil area that needs to be reinforced, thereby maintaining the microorganisms to react at the optimal working temperature, thereby improving the mineralization effect and the quality of soil reinforcement.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a slope reinforcement device based on microbial mineralization, comprising a bracket, on which is provided an injection component for injecting bacterial liquid and binder liquid, a temperature measuring component for detecting temperature, and a receiving component for receiving bacterial liquid and binder liquid.

[0008] The liquid injection assembly includes a controller and a plurality of liquid injection parts for conveying liquid, the controller is used to control the operation of the liquid injection parts; the output end of the liquid injection parts is connected to a plurality of bacteria injection needles for conveying bacterial liquid and grouting needles for conveying binder liquid, and flow regulating valves are provided at the connection points between the bacteria injection needles and the grouting needles and the liquid injection parts, the flow regulating valves are used to regulate the flow rates output by the bacteria injection needles and the grouting needles, and the input ends of the liquid injection parts are connected to liquid storage barrels; the liquid injection parts are fixedly connected to the outer side wall of the lower part of the liquid storage barrel, and the top of the liquid storage barrel is opened with an opening.

[0009] The temperature measuring component includes several temperature sensors. The bacteria injection needle and the grouting needle are arranged at intervals on the same straight line, and the temperature sensors are arranged horizontally on the same straight line; the bacteria injection needle and the grouting needle are connected to a temperature control system for conveying media of different temperatures; the bracket is also provided with a horizontal adjustment component and a vertical adjustment component for adjusting the position of the bacteria injection needle, the grouting needle and the temperature sensor.

[0010] The controller is used to receive temperature signals collected by the temperature sensor, and control the operation of the temperature control system, the opening of each flow control valve, the adjustment of the grouting needle and the adjustment of the position of the bacteria injection needle based on each temperature signal; specifically, it includes receiving the preset temperature rise value, the injection point of the bacterial solution and the binder, adjusting the position of the temperature sensor, collecting the initial temperature of the soil at the initial position and the specified depth; adjusting the temperature control system to transport different temperature media into the soil, and controlling the output end of the temperature control system to reach the preset temperature rise value; adjusting the bacteria injection needle and the grouting needle to the initial injection point and the flow control valve to the initial opening, and controlling the operation of the injection part; during the operation of the injection part, adjusting the position of the temperature sensor to collect the real-time soil temperature at the specified position and the specified depth, and when the initial soil temperature and the real-time soil temperature change value meet the preset temperature rise value, adjusting the bacteria injection needle and the grouting needle to other injection points, and adjusting the position of the temperature sensor until the bacteria solution and the binder are injected into each injection point in the coverage area.

[0011] The technical principles of the above scheme are as follows:

[0012] By storing the bacterial liquid and the cementing liquid in different liquid storage barrels, since the input end of the liquid injection part is connected to the liquid storage barrels respectively, and the output end of the liquid injection part is connected to a number of bacterial injection needles and grouting needles; therefore, the bacterial liquid can be transported to each bacterial injection needle through the liquid injection part and the cementing liquid can be transported to each grouting needle, and the bacterial liquid and the cementing liquid can be transported to the inside of the soil layer by the bacterial injection needle and the grouting needle. Since the bacterial injection needle and the grouting needle are both connected to a flow regulating valve, the bacterial injection needle and the grouting needle are arranged at intervals on the same straight line, and the temperature sensors are arranged horizontally on the same straight line. In addition, studies have shown that microorganisms will generate heat during the mineralization reaction; therefore, the temperature signal at the current position of the bacterial injection needle can be received by the temperature sensor, and the reaction of the bacterial liquid and the corresponding ions in the soil can be monitored based on the temperature change before and after the bacterial liquid is injected into the soil, and then it can be deduced whether the bacterial liquid is fully injected. And according to the temperature signal, the temperature control system is controlled to adjust the temperature of the injection point position, and the operation of the temperature control system is controlled according to the temperature reaction of the bacterial liquid and the cementing liquid at different positions.

[0013] When it is detected that the amount of bacterial liquid and cementing liquid injected is insufficient or excessive, the opening of each flow regulating valve can be adjusted to maintain the reaction of the bacterial liquid and cementing liquid within a stable range, and the injection amount and injection position of the bacterial liquid and cementing liquid can be adjusted by combining the situation of the bacterial liquid and cementing liquid received by the receiving component, thereby improving the effect of microbial mineralization. At the same time, the positions of the bacterial injection needle, the grouting needle and the temperature sensor can be adjusted through the lateral adjustment component and the longitudinal adjustment component, so as to meet the real-time monitoring of the temperature at different positions of the slope and the real-time adjustment of the injection flow, so as to achieve accurate injection and uniform distribution of the bacterial liquid and cementing liquid, and the bacterial liquid and cementing liquid seeping during the mineralization reaction can be recovered through the receiving component, thereby reducing the waste of bacterial liquid and cementing liquid.

[0014] The above scheme has the following beneficial effects:

[0015] 1. Aiming at the special terrain structure of the slope, the present invention ensures the uniform distribution of bacterial solution and cementing liquid in the soil by designing multiple bacterial injection needles, grouting needles and various adjustment components. Taking into account the different inclinations of the slope, the temperature sensor and the flow control valve are coordinated to collect temperature information at different points based on real-time temperature monitoring and different injection points, so that the monitoring is more accurate, and the flow of bacterial solution and cementing liquid can be better fed back and adjusted. The injection amount of bacterial solution and cementing liquid is adjusted based on the receiving situation of the receiving component, so that the bacterial solution and cementing liquid can act accurately on the soil area that needs to be reinforced. The temperature control system maintains the microorganisms to react at the optimal working temperature, thereby improving the survival rate of microorganisms, and then improving the mineralization effect and soil reinforcement quality.

[0016] 2. The present invention utilizes the lateral adjustment component and the longitudinal adjustment component to flexibly adjust the positions of the injection needle, the grouting needle and the temperature sensor according to different slope conditions and soil characteristics, thereby improving the reinforcement effect and being adaptable to various complex slope terrains. In addition, the injection needle and the grouting needle can realize the synchronous injection and step-by-step injection of the bacterial solution and the cementing solution, further enhancing the practicality of the device.

[0017] 3. The present invention aims at the complex terrain and inclination of the slope. By using the receiving assembly, the bacterial liquid and cementing liquid seeping during the mineralization reaction can be recovered, reducing the waste of bacterial liquid and cementing liquid, and also contributing to environmental protection. In addition, the use of microbial mineralization technology is environmentally friendly and does not produce harmful substances.

[0018] Furthermore, the lateral adjustment assembly includes a horizontal screw rod and a first driving member for driving the horizontal screw rod to rotate, and the controller is used to control the operation of the first driving member; the first driving member is fixedly connected to the top of the bracket, the output shaft of the first driving member is coaxially fixedly connected to the horizontal screw rod, the end of the horizontal screw rod away from the first driving member is rotatably matched with the bracket, and a plurality of first nuts are threaded on the horizontal screw rod.

[0019] The outer side wall of the first nut can be detachably connected with a vertical rod, and the end of the vertical rod away from the first nut is slidably matched with the inner side wall of the bracket, and a moving block is vertically slidably matched on the vertical rod; the bottom of the moving block is fixedly connected with a telescopic part, and the controller is used to control the operation of the telescopic part. The output shaft of the telescopic part is respectively fixedly connected to the injection needle, the grouting needle and the temperature sensor.

[0020] Beneficial effect: The horizontal screw is driven to rotate by the first driving member. Since the threads on the horizontal screw are matched with a plurality of first nuts, the first nuts are all fixedly connected with the vertical rods; therefore, when the horizontal screw rotates, it can drive the first nuts to move horizontally, and the movement of the first nuts drives the vertical rods to move accordingly. Since the vertical rods are all slidably matched with moving blocks, the bottom of the moving blocks are all fixedly connected with telescopic parts, and the output shafts of the telescopic parts are respectively fixedly connected with the injection needle and the temperature sensor; therefore, when the vertical rod drives the moving block to move to a suitable position, by adjusting the length of the telescopic part, the injection needle, the grouting needle and the temperature sensor can be inserted into soil layers of different depths, further improving the uniformity of bacterial liquid injection. In addition, the positions can be interchanged by installing the injection needle, the grouting needle and the temperature sensor on different moving blocks respectively.

[0021] Furthermore, the longitudinal adjustment assembly includes a vertical screw rod and a second driving member for driving the vertical screw rod to rotate, and the controller is used to control the operation of the second driving member; the vertical screw rod is vertically installed with the horizontal screw rod, the output shaft of the second driving member is coaxially fixedly connected to the vertical screw rod, the second driving member is fixedly connected to the top of the bracket, and the end of the vertical screw rod away from the second driving member cooperates with the bracket for rotation.

[0022] The vertical screw rod is threaded with a plurality of second nuts; the outer side walls of the second nuts are detachably connected with transverse blocks, and the ends of the transverse blocks away from the second nuts are slidably matched with the inner side walls of the bracket. The transverse blocks are provided with sliding grooves along their lengths, and the tops of the moving blocks are fixedly connected with sliders that are slidably matched with the sliding grooves.

[0023] Beneficial effect: The second driving member drives the vertical screw rod to rotate. Since the vertical screw rod is threaded with a plurality of second nuts, and the vertical screw rod is installed vertically with the horizontal screw rod, the second nut can be driven to move vertically by the rotation of the vertical screw rod. Since the second nut is fixedly connected with a transverse block, a sliding groove is provided on the transverse block along its length, and a slider fixedly connected with the moving block is slidably matched in the sliding groove, and the moving block is slidably matched with the vertical rod; therefore, the transverse block can be driven to move vertically by the second nut, and the movement of the transverse block enables the slider to drive the moving block fixedly connected with it to move vertically.

[0024] In this process, since the injection needle, grouting needle and temperature sensor are separately installed on different moving blocks, their movements are synchronized, and the relative positions remain unchanged during movement. The specific positions of the injection needle, grouting needle and temperature sensor are determined by adjusting the spacing between the first nut and the second nut. The moving block can be adjusted to any position in the bracket by linkage with the vertical rod to ensure the uniform distribution of the bacterial solution and the cementing liquid in the soil layer. By accurately controlling the position and flow of the injection needle and the grouting needle, the effective use of the bacterial solution and the cementing liquid is ensured to avoid waste caused by excessive injection.

[0025] Furthermore, the receiving assembly includes a plurality of hollow receiving plates, which are detachably connected to both sides of the bracket in the vertical direction; a plurality of leakage holes are opened on the top of the receiving plates, and a recovery assembly for recovering bacterial liquid and cementing liquid is also provided on the bracket.

[0026] Beneficial effect: Since the receiving plate is hollow inside and has several leakage holes on the top, the receiving plate can be pre-buried inside the soil layer and the seepage bacterial liquid and cementing liquid can be effectively recovered through the leakage holes. When the bacterial liquid and the cementing liquid are injected step by step, the bacterial liquid and the cementing liquid can be recovered separately to reduce waste.

[0027] Furthermore, the recovery component includes several filter barrels and suction pieces for sucking liquid, and the controller is used to control the operation of the suction pieces; the input ends of the suction pieces are connected to the bottom of the receiving plate, and the output ends of the suction pieces are connected to the inside of the filter barrels; the suction pieces are fixedly connected to the outer top walls of the filter barrels, and the filter barrels are detachable and connected to the top of the liquid storage barrel, and the inside of the filter barrels are fixedly connected with several filter layers for filtering bacterial liquid impurities.

[0028] Beneficial effect: The bacterial liquid and cementing liquid that seep into the receiving plate are recovered separately through the suction piece, and the recovered bacterial liquid and cementing liquid are effectively filtered separately by the filter barrel, and are put into use again after filtration, thereby reducing the waste of bacterial liquid and cementing liquid, and further reducing the cost of slope reinforcement.

[0029] Furthermore, a slope reinforcement method based on microbial mineralization comprises the following steps:

[0030] Step 1: Data collection: Conduct geological survey on the slope and collect geological information about the slope; design a slope reinforcement plan based on the geological information results.

[0031] Step 2, preparation of bacterial solution: according to the requirements of the reinforcement plan, different bacterial solutions and cementing solutions for reinforcement are prepared, and the different bacterial solutions for reinforcement are urea-lytic bacteria, denitrifying bacteria, sulfate-reducing bacteria, urea-decomposing bacteria or iron-salt-reducing bacteria; and the bacterial solution and cementing solution are filtered, and the bacterial solution is sterilized at high temperature.

[0032] Step 3: Injection of bacterial solution: Use the bacterial injection needle, grouting needle and flow regulating valve to transport the bacterial solution and cementing solution into the soil layer; and adjust the position of the moving block according to the different injection positions of the bacterial solution and cementing solution.

[0033] Step 4: Monitoring and adjustment: According to the feedback from the temperature sensor, adjust the opening of each flow control valve and the operation of the temperature control system in real time; calculate the seepage volume of the bacterial liquid and the cementing liquid according to the slope inclination, and adjust the initial opening of each flow control valve according to the seepage volume.

[0034] Step 5, bacterial liquid recovery: when the bacterial liquid and the binder liquid are injected step by step, the seeping bacterial liquid and the binder liquid are received respectively by using the leakage holes of the receiving plate; and the seeping bacterial liquid and the binder liquid are respectively sucked into different filter barrels by the suction piece, and the impurities of the bacterial liquid and the binder liquid are filtered respectively by the filter layer in the filter barrel. After the filtration is completed, the bacterial liquid is sterilized at high temperature, and stored in the liquid storage barrel after filtration and sterilization; the filter layer is made of one or more materials selected from quartz sand, porous ceramics, glass fiber, microporous filter membrane, ion exchange resin and filter cotton.

[0035] Furthermore, in step one, the geological information includes soil type, soil temperature, moisture content, soil structure, slope inclination and pH value; the reinforcement plan includes the type of bacterial solution, injection quantity, bacterial solution formulation and injection process.

[0036] Further, in step 2, the preparation steps of the bacterial liquid and the cementing liquid are as follows:

[0037] S1. Bacteria culture: Select appropriate bacteria according to geological information and reinforcement plan requirements; inoculate the selected bacteria into the culture medium and set culture conditions for preliminary culture.

[0038] S2. Preparation of nutrient solution: Select a nutrient solution suitable for the current bacterial strain, mix the bacterial strain and nutrient solution in a ratio of 1:9 to prepare a bacterial solution for reinforcement.

[0039] S3. Preparation of cementing liquid: urea and calcium ions are stirred and mixed in a ratio of 1:1 to prepare a cementing liquid.

[0040] S4. Filtration and sterilization: Use a filtration bucket to remove solid impurities in the bacterial solution and the binder solution; and perform high-temperature sterilization on the bacterial solution.

[0041] Furthermore, in S1, the culture conditions are set at a temperature of 25-30°C, a pH value of 7.3, and a culture time of 24-48h.

[0042] Further, in S2, the nutrient solution is selected from one or more of Luria-Bertani, M9, Tryptic Soy Broth and TerrificBroth.

[0043] The above scheme has the following beneficial effects:

[0044] 1. The present invention obtains accurate geological information of the slope through detailed geological surveys, ensures the scientificity and pertinence of the reinforcement scheme according to the specific conditions of the slope, and provides a reliable basis for designing personalized reinforcement schemes. This precise data collection and analysis ensures the pertinence and effectiveness of the reinforcement scheme and improves the reinforcement effect.

[0045] According to the requirements of the reinforcement scheme, different types of bacterial solutions for reinforcement are prepared, such as urea-decomposing bacteria, denitrifying bacteria, sulfate-reducing bacteria, urea-decomposing bacteria and iron-reducing bacteria. These bacterial solutions can induce calcium carbonate precipitation under appropriate conditions to form hard stone bodies, thereby enhancing the mechanical properties and stability of the soil layer. By precisely controlling the type, quantity, combination and injection process of bacterial solutions and cementing solutions, efficient utilization of microbial mineralization is achieved. According to the characteristics of different bacterial solutions, the most suitable bacterial solutions and cementing solutions for the current geological conditions are selected to improve the reinforcement effect.

[0046] 2. The present invention uses a liquid injection needle and a flow control valve to accurately deliver the bacterial solution and cementing solution for reinforcement to the interior of the soil layer. By adjusting the position of the moving block, the injection position and depth of the bacterial solution and cementing solution can be flexibly controlled to ensure that the bacterial solution and cementing solution can be evenly distributed and fully effective. This flexible adjustment method improves the uniformity and efficiency of reinforcement and improves the mineralization effect.

[0047] The temperature sensor monitors the temperature changes of the bacterial liquid and the cementing liquid in real time, and calculates the seepage of the bacterial liquid and the cementing liquid according to the slope inclination; based on these feedback information, the opening of each flow regulating valve is adjusted in time to ensure that the flow and temperature of the bacterial liquid and the cementing liquid are in the optimal state. This real-time monitoring and adjustment mechanism improves the controllability and safety of the reinforcement process.

[0048] 3. The present invention utilizes the leakage holes and suction parts of the receiving plate to receive and suction the seeping bacterial liquid and cementing liquid into different filter barrels when the bacterial liquid and cementing liquid are injected step by step. The bacterial liquid and cementing liquid impurities are filtered by the filter layer respectively, and the filtered impurities are stored separately, thereby realizing the environmentally friendly recovery and reuse of the bacterial liquid and cementing liquid. Effectively recovering the seeping bacterial liquid and cementing liquid can reduce waste and reduce the direct loss of the bacterial liquid and cementing liquid into the environment. The filtered bacterial liquid and cementing liquid can be reused, thereby improving resource utilization and reducing operating costs.

[0049] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is an axonometric diagram of a slope reinforcement device based on microbial mineralization in an embodiment of the present invention.

[0051] Figure 2 It is a schematic diagram of the installation of the slope reinforcement device based on microbial mineralization in an embodiment of the present invention.

[0052] Figure 3 It is a front cross-sectional view of the liquid storage barrel and the filter barrel in an embodiment of the present invention.

[0053] Figure 4It is a schematic diagram of the process of the slope reinforcement method based on microbial mineralization in an embodiment of the present invention.

[0054] The figure marks in the drawings of the specification include: 1. bracket; 2. injection pump; 3. injection needle; 4. liquid storage barrel; 5. horizontal screw rod; 6. first motor; 7. first nut; 8. vertical rod; 9. moving block; 10. hydraulic telescopic rod; 11. vertical screw rod; 12. second motor; 13. second nut; 14. horizontal block; 15. slider; 16. receiving plate; 17. filter barrel; 18. suction pump; 19. grouting needle. DETAILED DESCRIPTION

[0055] The following is further described in detail through specific implementation methods:

[0056] Embodiment 1:

[0057] As attached Figure 1-Figure 3 As shown: a slope reinforcement device based on microbial mineralization includes a bracket 1, on which are provided an injection component for injecting bacterial liquid and cementing liquid, a temperature measuring component for detecting temperature, and a receiving component for receiving the bacterial liquid and cementing liquid.

[0058] The injection assembly includes a controller and a plurality of injection parts for conveying liquid. In this embodiment, the injection part is an injection pump 2, and the controller is used to control the operation of the injection pump 2; the output end of the injection pump 2 is connected to a plurality of injection needles 3 for conveying bacterial liquid and a grouting needle 19 for conveying binder liquid. The injection needles 3 and the grouting needles 19 are connected to the injection pump 2 at the connection points with the injection pump 2. The flow regulating valve is used to adjust the flow rate output by the injection needles 3 and the grouting needles 19. The input ends of the injection pumps 2 are connected to the liquid storage barrel 4; the injection pumps 2 are bolted and fixed to the outer side wall of the lower part of the liquid storage barrel 4, and the top of the liquid storage barrel 4 is opened with an opening.

[0059] The temperature measuring component includes several temperature sensors. The bacteria injection needle 3 and the grouting needle 19 are arranged at intervals on the same straight line, and the temperature sensors are arranged horizontally on the same straight line. The bacteria injection needle 3 and the grouting needle 19 are connected to a temperature control system for conveying media of different temperatures. In this example, the temperature control system is an air conditioner. The bracket 1 is also provided with a horizontal adjustment component and a vertical adjustment component for adjusting the positions of the bacteria injection needle 3, the grouting needle 19 and the temperature sensor. By controlling the operation of the horizontal adjustment component and the vertical adjustment component by the controller, the position of the bacteria injection needle 3 can be adjusted.

[0060] The controller is used to receive the temperature signal collected by the temperature sensor, and based on each temperature signal, control the operation of the temperature control system, the opening of each flow regulating valve, adjust the grouting needle 19 and adjust the position of the bacteria injection needle 3; specifically, it includes receiving the preset temperature rise value, the injection point of the bacterial solution and the binder, adjusting the position of the temperature sensor, collecting the initial temperature of the soil at the initial position and the specified depth; adjusting the air conditioner to transport different temperature media into the soil, and controlling the output end of the air conditioner to reach the preset temperature rise value; adjusting the bacteria injection needle 3 and the grouting needle 19 to the initial injection point and the flow regulating valve to the initial opening, and controlling the operation of the injection pump 2; during the operation of the injection pump 2, adjusting the position of the temperature sensor to collect the real-time soil temperature at the specified position and the specified depth, when the initial soil temperature and the real-time soil temperature change value meet the preset temperature rise value, adjusting the bacteria injection needle 3 and the grouting needle 19 to other injection points, and adjusting the position of the temperature sensor until the bacteria solution and the binder are injected at each injection point in the coverage area.

[0061] For example, a preset temperature rise value is set, such as 26°C, and multiple bacterial liquid and cementing liquid injection points are set. These points are arranged according to the geological conditions and reinforcement requirements of the slope; the controller first adjusts the position of the temperature sensor so that it is located at the specified depth of the initial injection point, and collects the initial soil temperature at this position. The controller controls the soil temperature at the corresponding depth of the air conditioner output end to maintain at 26°C; the controller adjusts the position of the bacterial injection needle 3 so that it is located at the specified depth of the initial injection point; and adjusts the flow control valve to the initial opening to ensure that the bacterial liquid and cementing liquid are injected into the soil at an appropriate flow rate, and starts the injection pump 2 to start injecting the bacterial liquid and cementing liquid into the soil.

[0062] During the operation of the injection pump 2, the controller determines whether the preset temperature rise value is reached according to the change value of the initial soil temperature and the real-time temperature. When the change value of the initial soil temperature and the real-time temperature meets the preset temperature rise value of 26°C, the controller adjusts the injection needle 3 to the next injection point; if it does not reach 26°C, the air conditioning output end delivery temperature of the point is adjusted until the preset temperature rise value is met. The controller repeats the above steps until all preset injection points have completed the injection of bacterial solution and cementing solution; the controller turns off the injection pump 2 to complete the entire reinforcement process.

[0063] Specifically, Figure 1 As shown, the lateral adjustment assembly includes a horizontal screw rod 5 and a first driving member for driving the horizontal screw rod 5 to rotate. In this embodiment, the first driving member is a first motor 6, and the controller is used to control the operation of the first motor 6; the first motor 6 is bolted and fixedly connected to the top of the bracket 1, and the output shaft of the first motor 6 is coaxially fixedly connected to the horizontal screw rod 5 through a coupling. The left end of the horizontal screw rod 5 is rotatably matched with the bracket 1, and a plurality of first nuts 7 are threadedly matched on the horizontal screw rod 5.

[0064] The outer side wall of the first nut 7 is detachably connected with a vertical rod 8, the top of the vertical rod 8 is slidably matched with the inner side wall of the bracket 1, and a moving block 9 is vertically slidably matched on the vertical rod 8; the bottom of the moving block 9 is bolted and fixed with a telescopic part. In this embodiment, the telescopic part is a hydraulic telescopic rod 10, and the controller is used to control the operation of the hydraulic telescopic rod 10. The output shaft of the hydraulic telescopic rod 10 is fixedly connected to the injection needle 3, the grouting needle 19 and the temperature sensor respectively.

[0065] by Figure 1 For example, the horizontal screw rod 5 is driven to rotate by the first motor 6. Since the horizontal screw rod 5 is threaded with a plurality of first nuts 7, the first nuts 7 are all bolted and fixedly connected with the vertical rod 8; therefore, when the horizontal screw rod 5 rotates, it can drive the first nuts 7 to move horizontally, and the movement of the first nuts 7 drives the vertical rod 8 to move accordingly. Since the vertical rods 8 are all slidably matched with the moving blocks 9, the bottom of the moving blocks 9 are all bolted and fixedly connected with the hydraulic telescopic rod 10, and the output shaft of the hydraulic telescopic rod 10 is respectively screwed and fixedly connected with the injection needle 3 and the temperature sensor; therefore, when the vertical rod 8 drives the moving block 9 to move to the appropriate position, by adjusting the length of the hydraulic telescopic rod 10, the injection needle 3, the grouting needle 19 and the temperature sensor can be inserted into the soil layer of different depths, further improving the uniformity of the bacterial liquid injection. In addition, the injection needle 3, the grouting needle 19 and the temperature sensor can be installed on different moving blocks 9 respectively to achieve the interchange of positions.

[0066] like Figure 1 As shown, the longitudinal adjustment assembly includes a vertical screw rod 11 and a second driving member for driving the vertical screw rod 11 to rotate. In this embodiment, the second driving member is a second motor 12, and the controller is used to control the operation of the second motor 12; the vertical screw rod 11 is vertically installed with the horizontal screw rod 5, and the output shaft of the second motor 12 is coaxially fixedly connected with the vertical screw rod 11 through a coupling, and the second motor 12 is bolted and fixedly connected to the top of the bracket 1, and the top end of the vertical screw rod 1 is rotatably matched with the bracket 1.

[0067] A plurality of second nuts 13 are threadedly engaged on the vertical screw rod 11; the outer side walls of the second nuts 13 are detachably engaged with transverse blocks 14, the right ends of the transverse blocks 14 are slidably engaged with the inner side walls of the bracket 1, and sliding grooves are opened on the transverse blocks 14 along their length directions, and the tops of the moving blocks 9 are fixedly connected with sliders 15 that slide in cooperation with the sliding grooves with screws.

[0068] by Figure 1For example, the second motor 12 drives the vertical screw 11 to rotate. Since the vertical screw 11 is threaded with a plurality of second nuts 13, and the vertical screw 11 is vertically installed with the horizontal screw 5. Therefore, the second nut 13 can be driven to move vertically by rotating the vertical screw 11. Since the second nut 13 is bolted and fixedly connected with a transverse block 14, a slide groove is provided on the transverse block 14 along its length direction, and a slider 15 fixedly connected with the moving block 9 by screws is slidably matched in the slide groove, and the moving block 9 is slidably matched with the vertical rod 8; therefore, the transverse block 14 can be driven to move vertically by the second nut 13, and the movement of the transverse block 14 enables the slider 15 to drive the moving block 9 fixedly connected with the screws to move vertically.

[0069] In this process, since the injection needle 3, the grouting needle 19 and the temperature sensor are separately installed on different moving blocks 9, their movements are synchronized, and the relative positions remain unchanged during movement. The specific positions of the injection needle 3, the grouting needle 19 and the temperature sensor are determined by adjusting the spacing between the first nut 7 and the second nut 13. And the adjustment of the moving block 9 at any position in the bracket 1 is realized by linkage with the vertical rod 8 to ensure the uniform distribution of the bacterial solution and the cementing liquid in the soil layer. By accurately controlling the position and flow of the injection needle 3 and the grouting needle 19, the effective use of the bacterial solution and the cementing liquid is ensured to avoid waste caused by excessive injection.

[0070] like Figure 1 and Figure 2 As shown, the receiving assembly includes a plurality of hollow receiving plates 16, which can be detachably connected to both sides of the bracket 1 in the vertical direction; a plurality of leakage holes are opened on the top of the receiving plates 16, and a recovery assembly for recovering bacterial liquid is also provided on the bracket 1. Figure 3 As shown, the recovery component includes a plurality of filter barrels 17 and a suction piece for sucking liquid. In this embodiment, the suction piece is a suction pump 18, and the controller is used to control the operation of the suction pump 18; the input ends of the suction pumps 18 are connected to the bottom of the receiving plate 16, and the output ends of the suction pumps 18 are connected to the inside of the filter barrels 17; the suction pumps 18 are bolted and fixedly connected to the outer top wall of the filter barrels 17, and the filter barrels 17 can be detachably engaged and connected to the top of the liquid storage barrel 4, and a plurality of filter layers for filtering bacterial liquid impurities are fixedly bonded inside the filter barrels 17.

[0071] In this embodiment, the bacterial liquid and the cementing liquid are recovered separately only when the bacterial liquid and the cementing liquid are injected step by step. Since the receiving plate 16 is hollow inside and has a plurality of leakage holes on the top, the receiving plate 16 can be pre-buried inside the soil layer and the leakage holes can be used to effectively recover the seepage bacterial liquid and the cementing liquid, thereby reducing waste. In addition, the bacterial liquid and the cementing liquid that seep into the receiving plate 16 can be respectively drawn back by the suction pump 18, and the recovered bacterial liquid and the cementing liquid can be effectively filtered by the filter barrel 17, and can continue to be put into use after filtration, thereby reducing the waste of bacterial liquid and the cementing liquid, and further reducing the cost of slope reinforcement.

[0072] The specific implementation process is as follows: First, before the slope is treated, the bracket 1 is installed on the slope surface, and during the operation, multiple brackets 1 can be used to achieve layered construction to increase construction efficiency. During microbial mineralization, the bacterial solution and the cementing liquid containing specific microorganisms are stored in different liquid storage barrels 4. Since the input end of the injection pump 2 is connected to the liquid storage barrel 4, the output end of the injection pump 2 is connected to a plurality of injection needles 3 and grouting needles 19; therefore, the bacterial solution can be transported to each injection needle 3 and the cementing liquid can be transported to each grouting needle 19 through the injection pump 2, and the bacterial solution and the cementing liquid can be transported to the inside of the soil layer by the injection needles 3 and the grouting needles 19.

[0073] Since the injection needle 3 and the grouting needle 19 are both connected with a flow regulating valve, the injection needle 3 and the grouting needle 19 are arranged at intervals on the same straight line, and the temperature sensors are arranged horizontally on the same straight line. In addition, studies have shown that microorganisms will generate heat during the mineralization reaction; therefore, the temperature signal at the current position of the injection needle 3 can be received by the temperature sensor, and the reaction between the bacterial solution and the corresponding ions in the soil can be monitored based on the temperature changes before and after the injection of liquid in the soil, and then it can be deduced whether the bacterial solution is fully injected. The air conditioner is controlled according to the temperature signal to adjust the temperature of the injection point, and the operation of the air conditioner is controlled according to the temperature reaction of the bacterial solution and the cementing liquid at different positions.

[0074] When it is detected that the amount of bacterial liquid and cementing liquid injected is insufficient or excessive, the opening of each flow regulating valve can be adjusted to increase or decrease the delivery flow of bacterial liquid and cementing liquid, so that the reaction is maintained in a stable range, and the injection amount and injection position of bacterial liquid and cementing liquid are adjusted by combining the bacterial liquid and cementing liquid received by the receiving plate 16, thereby improving the effect of microbial mineralization. In view of the special terrain structure of the slope, taking into account the different inclinations of the slope, the flow of bacterial liquid and cementing liquid is adjusted according to real-time temperature feedback through the cooperation of temperature sensors and flow regulating valves, so that the bacterial liquid and cementing liquid can accurately act on the soil area that needs to be reinforced, thereby maintaining the microorganisms to react at the optimal working temperature, thereby improving the mineralization effect and soil reinforcement quality.

[0075] At the same time, by adjusting the position of the vertical rod 8 and the horizontal block 14, the position of the injection needle 3, the grouting needle 19 and the temperature sensor can be adjusted, so as to meet the real-time monitoring of different positions of the slope and the real-time adjustment of the injection flow, and realize the accurate injection and uniform distribution of the bacterial solution and the cementing liquid. According to the different inclination degrees of the slope, when the bacterial solution and the cementing liquid are injected in steps, the bacterial solution and the cementing liquid that seep in the mineralization reaction process can be recovered through the receiving plate 16, thereby reducing the waste of the bacterial solution and the cementing liquid, and also contributing to environmental protection. In addition, according to different slope conditions and soil characteristics, the position of the injection needle 3, the grouting needle 19 and the temperature sensor can be flexibly adjusted to improve the reinforcement effect and adapt to various complex slope terrains. The use of microbial mineralization technology is environmentally friendly and does not produce harmful substances. The injection needle 3 and the grouting needle 19 can also realize the synchronous injection and step-by-step injection of the bacterial solution and the cementing liquid, further enhancing the practicality of the device.

[0076] Embodiment 2:

[0077] As attached Figure 4 As shown, the difference from the above embodiment is that the present invention also provides a slope reinforcement method based on microbial mineralization, comprising the following steps:

[0078] Step 1: Data collection: Conduct geological surveys on the slopes and collect geological information about the slopes to ensure the scientificity and pertinence of the reinforcement plan, thereby improving the reinforcement effect; design slope reinforcement plans based on the geological information results to adapt to different geological conditions and soil types.

[0079] Among them, geological information includes soil type, soil temperature, moisture content, soil structure, slope inclination and pH value; the reinforcement plan includes the type of bacterial solution, injection quantity, bacterial solution formulation and injection process.

[0080] Specifically, before slope treatment, geological information is collected to determine whether there are potential risks such as landslides and collapses on the slope, and after confirming the location where slope treatment is required, a preliminary understanding of the topography, vegetation coverage, surface cracks, etc. of the slope at the treatment location is obtained.

[0081] Soil type: Through field observation, sampling and laboratory testing, we determined the soil types of clay, sand, silt and gravel, and measured the temperature, humidity and pH value of the soil to understand the effects of these parameters on microbial activity. We analyzed the soil structure such as particle size, porosity and density, measured the slope inclination angle and evaluated the stability of the slope.

[0082] The slope gradient, slope length and slope morphology were recorded in detail. Representative sections were selected to record the distribution of rock layers, soil thickness and crack development. Soil samples were taken at different depths and locations for indoor test analysis to obtain the physical and mechanical properties of the soil, such as density, water content, shear strength, etc. Groundwater level meters were used to measure groundwater levels at different locations to understand the dynamic changes of groundwater. Geological radar was used to detect the geological structure inside the slope and identify potential cavities, cracks and weak layers.

[0083] Step 2, preparation of bacterial solution: prepare different bacterial solutions and cementing solutions for reinforcement according to the requirements of the reinforcement scheme. Among them, the different bacterial solutions for reinforcement are urea-lytic bacteria, denitrifying bacteria, sulfate-reducing bacteria, urea-decomposing bacteria or iron-reducing bacteria. In this embodiment, urea-lytic bacteria is selected; and the bacterial solution and cementing solution are filtered, and the bacterial solution is sterilized at high temperature. This embodiment can select the bacterial solution that best suits the current geological conditions according to the characteristics of different bacterial solutions, ensure that the microorganisms play an efficient role in the mineralization process, and thus improve the mineralization effect.

[0084] Specifically, the steps for preparing the bacterial solution and the cementing solution are as follows:

[0085] S1. Bacteria culture: Select appropriate bacteria according to geological information and reinforcement plan requirements; inoculate the selected bacteria into the culture medium and set culture conditions for preliminary culture.

[0086] The culture conditions were as follows: the temperature was set at 30°C, the pH value was 7.3, and the culture time was 48 hours.

[0087] S2. Preparation of nutrient solution: Select a nutrient solution suitable for the current bacterial strain; mix the bacterial strain and the nutrient solution in a ratio of 1:9 to prepare a reinforcement bacterial solution; wherein the nutrient solution is selected from one or more of Luria-Bertani, M9, Tryptic Soy Broth and Terrific Broth; Luria-Bertani nutrient solution is selected in this embodiment.

[0088] S3. Preparation of cementing liquid: urea and calcium ions are stirred and mixed in a ratio of 1:1 to prepare a cementing liquid.

[0089] S4, filtration and sterilization: Use the filter barrel 17 to remove solid impurities in the bacterial solution and the cementing liquid; and perform high-temperature sterilization on the bacterial solution.

[0090] For example, for clay layers, MICP reinforcement of urea-lytic bacteria can be selected because it grows well in an alkaline environment; using microorganisms to produce urease bacteria to decompose urea CO(NH2)2, which produces ammonium radicals Ions and carbonates ions, urea CO(NH2)2 decomposition leads to an increase in the pH value of the environment, in the presence of calcium Ca 2+In the presence of calcium ions, 2+ Ions and carbonate The ions combine to form calcium carbonate CaCO3 precipitation, and the chemical reaction formula is as follows:

[0091]

[0092] Step 3, bacterial liquid injection: use the bacterial injection needle 3, the grouting needle 19 and the flow control valve to transport the bacterial liquid and the cementing liquid into the soil layer; and adjust the position of the moving block 9 according to the different injection positions of the bacterial liquid and the cementing liquid to ensure that the bacterial liquid and the cementing liquid are evenly distributed at different depths and positions. And according to the specific conditions of the slope, the injection position can be flexibly adjusted to adapt to different geological conditions.

[0093] Specifically, the amount of liquid to be injected is determined based on the porosity and moisture content of the soil. Soil with high porosity and low moisture content requires more bacterial solution; for example, when the soil porosity is 30%, the moisture content is set to 15%, and the injection amount per square meter is 10L.

[0094] Step 4, monitoring and adjustment: According to the feedback from the temperature sensor, adjust the opening of each flow control valve and the operation of the air conditioner in real time to maintain the reaction temperature at the injection point at a stable preset value. In addition, when monitoring and adjusting the flow of bacterial solution and cementing solution, calculate the seepage of bacterial solution and cementing solution according to the slope inclination, and adjust the initial opening of each flow control valve according to the seepage to ensure the stability and efficiency of the mineralization process.

[0095] Step 5, bacterial liquid recovery: when the bacterial liquid and the cementing liquid are injected step by step, the seeping bacterial liquid and the cementing liquid are respectively received by the leakage holes of the receiving plate 16, and the seeping bacterial liquid and the cementing liquid are effectively recovered to reduce waste; and the seeping bacterial liquid and the cementing liquid are respectively sucked into different filter barrels 17 by the suction pump 18, and the bacterial liquid and the cementing liquid impurities are filtered by the filter layer in the filter barrel 17, and the bacterial liquid is sterilized at high temperature after filtration, and stored in the liquid storage barrel 4 after filtration and sterilization. The filtered bacterial liquid and the cementing liquid can be reused, which improves resource utilization and reduces operating costs.

[0096] The filter layer is made of one or more materials selected from quartz sand, porous ceramics, glass fiber, microporous filter membrane, ion exchange resin and filter cotton. In this embodiment, quartz sand and filter cotton are selected.

[0097] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A slope reinforcement device based on microbial mineralization, comprising a support (1), characterized in that: The support (1) is provided with an injection component for injecting bacterial liquid and cementing liquid, a temperature measuring component for detecting temperature, and a receiving component for receiving the bacterial liquid and cementing liquid; The liquid injection assembly comprises a controller and a plurality of liquid injection parts for conveying liquid, wherein the controller is used to control the operation of the liquid injection parts; the output end of the liquid injection parts is connected to a plurality of bacterial injection needles (3) for conveying bacterial liquid and a grouting needle (19) for conveying cementing liquid, and flow regulating valves are provided at the connection points between the bacterial injection needles (3) and the grouting needles (19) and the liquid injection parts, and the flow regulating valves are used to regulate the flow output by the bacterial injection needles (3) and the grouting needles (19), and the input ends of the liquid injection parts are connected to a liquid storage barrel (4); the liquid injection parts are fixedly connected to the outer side wall of the lower part of the liquid storage barrel (4), and the top of the liquid storage barrel (4) is opened; The temperature measuring component comprises a plurality of temperature sensors. The bacteria injection needle (3) and the grouting needle (19) are arranged at intervals on the same straight line, and the temperature sensors are arranged transversely on the same straight line. The bacteria injection needle (3) and the grouting needle (19) are both connected to a temperature adjustment system for conveying media of different temperatures. The bracket (1) is also provided with a transverse adjustment component and a longitudinal adjustment component for adjusting the positions of the bacteria injection needle (3), the grouting needle (19) and the temperature sensor. The controller is used to receive temperature signals collected by the temperature sensor, and based on each temperature signal, control the operation of the temperature control system, the opening of each flow control valve, adjust the grouting needle (19) and adjust the position of the bacteria injection needle (3); specifically, it includes receiving a preset temperature rise value, the injection point of the bacterial liquid and the cementing liquid, adjusting the position of the temperature sensor, collecting the initial temperature of the soil at the initial position and the specified depth; adjusting the temperature control system to transport different temperature media into the soil, and controlling the output end of the temperature control system to reach the preset temperature rise value; adjusting the bacteria injection needle (3) and the grouting needle (19) to the initial injection point and the flow control valve to the initial opening, and controlling the operation of the injection part; during the operation of the injection part, adjusting the position of the temperature sensor to collect the real-time temperature of the soil at the specified position and the specified depth, and when the soil initial temperature and the soil real-time temperature change value meet the preset temperature rise value, adjusting the bacteria injection needle (3) and the grouting needle (19) to other injection points, and adjusting the position of the temperature sensor until the bacteria liquid and the cementing liquid are injected at each injection point in the coverage area.

2. The slope reinforcement device based on microbial mineralization according to claim 1 is characterized in that: The lateral adjustment assembly comprises a horizontal screw rod (5) and a first driving member for driving the horizontal screw rod (5) to rotate, and the controller is used to control the operation of the first driving member; the first driving member is fixedly connected to the top of the bracket (1), the output shaft of the first driving member is coaxially fixedly connected to the horizontal screw rod (5), one end of the horizontal screw rod (5) away from the first driving member is rotationally matched with the bracket (1), and a plurality of first nuts (7) are threadedly matched on the horizontal screw rod (5); The outer wall of the first nut (7) is detachably connected to a vertical rod (8), and one end of the vertical rod (8) away from the first nut (7) is slidably matched with the inner wall of the bracket (1), and a moving block (9) is vertically slidably matched on the vertical rod (8); a telescopic part is fixedly connected to the bottom of the moving block (9), and a controller is used to control the operation of the telescopic part. The output shaft of the telescopic part is respectively fixedly connected to the injection needle (3), the grouting needle (19) and the temperature sensor.

3. The slope reinforcement device based on microbial mineralization according to claim 2 is characterized in that: The longitudinal adjustment component comprises a vertical screw rod (11) and a second driving member for driving the vertical screw rod (11) to rotate, and a controller is used to control the operation of the second driving member; the vertical screw rod (11) is vertically installed with the horizontal screw rod (5), the output shaft of the second driving member is coaxially fixedly connected with the vertical screw rod (11), the second driving member is fixedly connected to the top of the bracket (1), and one end of the vertical screw rod (11) away from the second driving member is rotationally matched with the bracket (1); A plurality of second nuts (13) are threadedly engaged on the vertical screw rod (11); the outer side walls of the second nuts (13) are detachably connected with transverse blocks (14); the ends of the transverse blocks (14) away from the second nuts (13) are slidably engaged with the inner side walls of the bracket (1); the transverse blocks (14) are provided with sliding grooves along their length directions; and the tops of the moving blocks (9) are fixedly connected with sliders (15) slidably engaged with the sliding grooves.

4. The slope reinforcement device based on microbial mineralization according to claim 3 is characterized in that: The receiving assembly comprises a plurality of receiving plates (16) with hollow interiors, and the receiving plates (16) are all detachably connected to both sides of the bracket (1) in the vertical direction; a plurality of leakage holes are provided on the top of the receiving plates (16), and a recovery assembly for recovering bacterial liquid and cementing liquid is also provided on the bracket (1).

5. The slope reinforcement device based on microbial mineralization according to claim 4 is characterized in that: The recovery assembly comprises a plurality of filter barrels (17) and a suction piece for sucking liquid, and a controller is used to control the operation of the suction piece; the suction piece input ends are all connected to the bottom of the receiving plate (16), and the suction piece output ends are all connected to the inside of the filter barrel (17); the suction pieces are all fixedly connected to the outer top wall of the filter barrel (17), the filter barrel (17) is detachable and connected to the top of the liquid storage barrel (4), and a plurality of filter layers for filtering bacterial liquid impurities are fixedly connected to the inside of the filter barrel (17).

6. A slope reinforcement method based on microbial mineralization, carried out according to any one of the slope reinforcement devices based on microbial mineralization according to claims 1-5, characterized in that: The following steps are involved: Step 1: Data collection: Conduct geological survey on the slope and collect geological information about the slope; design a slope reinforcement plan based on the geological information of the slope; Step 2, bacterial solution preparation: according to the requirements of the reinforcement scheme, different bacterial solutions and cementing solutions for reinforcement are prepared, and the bacterial solution for reinforcement is urea-lytic bacteria, denitrifying bacteria, sulfate-reducing bacteria, urea-decomposing bacteria or iron-reducing bacteria; The bacterial solution and the cementing solution are filtered, and the bacterial solution is sterilized at high temperature; Step 3, bacterial liquid injection: using the bacterial injection needle (3), the grouting needle (19) and the flow regulating valve to transport the bacterial liquid and the cementing liquid into the soil layer; and adjusting the position of the moving block (9) according to the different injection positions of the bacterial liquid and the cementing liquid; Step 4: Monitoring and adjustment: According to the feedback from the temperature sensor, the opening of each flow control valve and the operation of the temperature control system are adjusted in real time; the seepage volume of the bacterial liquid and the cementing liquid is calculated according to the slope inclination, and the initial opening of each flow control valve is adjusted according to the seepage volume; Step 5, bacterial liquid recovery: when the bacterial liquid and the binder liquid are injected step by step, the seeping bacterial liquid and the binder liquid are respectively received by using the leakage holes of the receiving plate (16); and the seeping bacterial liquid and the binder liquid are respectively sucked into different filter barrels (17) by the suction piece, and the impurities of the bacterial liquid and the binder liquid are respectively filtered by the filter layer in the filter barrel (17). After the filtration is completed, the bacterial liquid is sterilized at high temperature, and after filtration and sterilization, it is stored in the liquid storage barrel (4); the filter layer is made of one or more materials selected from quartz sand, porous ceramics, glass fiber, microporous filter membrane, ion exchange resin and filter cotton.

7. The slope reinforcement method based on microbial mineralization according to claim 6 is characterized in that: In step one, the geological information includes soil type, soil temperature, moisture content, soil structure, slope inclination and pH value; the reinforcement plan includes the type of bacterial solution, injection quantity, bacterial solution formulation and injection process.

8. The slope reinforcement method based on microbial mineralization according to claim 7 is characterized in that: In step 2, the preparation steps of bacterial solution and cementing solution are as follows: S1. Bacteria culture: Select appropriate bacteria according to geological information and reinforcement plan requirements; inoculate the selected bacteria into the culture medium and set culture conditions for preliminary culture; S2, nutrient solution preparation: select a nutrient solution suitable for the current strain, mix the strain and the nutrient solution in a ratio of 1:9 to prepare a reinforcement bacterial solution; S3, preparation of cementing liquid: urea and calcium ions are stirred and mixed in a ratio of 1:1 to prepare a cementing liquid; S4, filtration sterilization: using a filter barrel (17) to remove solid impurities in the bacterial solution and the cementing liquid; and subjecting the bacterial solution to high temperature sterilization.

9. The slope reinforcement method based on microbial mineralization according to claim 8, characterized in that: In S1, the culture conditions are set at a temperature of 25-30°C, a pH value of 7.3, and a culture time of 24-48h.

10. The slope reinforcement method based on microbial mineralization according to claim 9, characterized in that: In S2, the nutrient solution is selected from one or more of Luria-Bertani, M9, Tryptic Soy Broth and Terrific Broth.

Images