A slope vegetation reinforcement device based on microbial mineralization and a method thereof

Abstract

The present application relates to the technical field of slope microbial remediation and reinforcement, and particularly relates to a slope greening reinforcement equipment based on microbial mineralization and a method thereof, which comprises a moving mechanism, a rack arranged on the moving mechanism, a leveling mechanism arranged on the rack, the leveling mechanism comprising a rotating disc, an extension assembly, a greening material introduction assembly and a spraying assembly, the extension assembly, the greening material introduction assembly and the spraying assembly being arranged in the rotating disc, the extension assembly being used for pushing the greening material introduction assembly out of the rotating disc, the greening material introduction assembly being used for introducing the ecological composite material into the ecological hole, and a cutting assembly being further arranged on the greening material introduction assembly. The present application reserves a growth channel for plant growth, avoids the generated calcium carbonate cementation layer from hindering seed germination and seedling breaking soil, and realizes instantaneous mixing of the bacterial liquid and the cementation liquid after leaving the equipment and before contacting the slope surface, avoids pipeline blockage caused by early mixing, and guarantees continuous and stable operation of the equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of slope microbial remediation and reinforcement, and particularly relates to a slope vegetation reinforcement device based on microbial mineralization and a method thereof. BACKGROUND

[0002] Slope stability is one of the core issues in the field of geotechnical engineering. Traditional reinforcement technologies such as anchor rods, retaining walls and cement-based grouting, although widely used, are often accompanied by problems such as high energy consumption, non-renewable materials and large construction disturbance, especially in ecologically sensitive areas, which lack environmental compatibility. Microbial induced carbonate precipitation (MICP) technology, as a new biomineralization method for soil improvement, has attracted widespread attention due to its low energy consumption, environmental friendliness and convenient operation. MICP technology relies on the metabolism of urease-producing microorganisms such as Bacillus pasteurii, which catalyzes the hydrolysis of urea to generate carbonate ions, which combine with free calcium ions in the environment to form calcite-type calcium carbonate precipitates. The precipitates can effectively fill soil pores and cement soil particles, thereby significantly improving the shear strength, stiffness and erosion resistance of the soil. To achieve the synergy of ecological restoration and mechanical reinforcement, the existing technology often combines MICP with vegetation slope protection, i.e., spraying bacteria solution while sowing seeds, aiming to provide early strength with calcium carbonate precipitation and ensure long-term slope stability through the reinforcement effect of subsequent vegetation root growth.

[0003] However, in the practical application of the above coupling technology, the calcium carbonate precipitate induced by biomineralization often forms a continuous and dense crust layer on the slope surface, which not only provides significant mechanical reinforcement effect to the slope surface, but also significantly inhibits plant growth and development. On the one hand, the dense and continuous characteristics of the crust layer form a physical barrier on the surface layer of the slope, significantly inhibiting the germination process of the seeds; on the other hand, its extremely low permeability significantly weakens the gas diffusion efficiency (such as oxygen, carbon dioxide, etc.) and water infiltration capacity of the soil-atmosphere interface, thereby causing the microenvironment of the seed germination layer to deteriorate, significantly inhibiting the normal development and extension of the root system. As a result, the short-term engineering benefits of biomineralization reinforcement technology and the long-term stability function of the plant ecosystem cannot form an effective synergistic effect, and even after the crust layer gradually loses its mechanical properties due to natural aging, the slope may face more severe instability risks due to insufficient vegetation coverage. SUMMARY

[0004] The present application provides a slope vegetation reinforcement device based on microbial mineralization and a method thereof to solve the above technical problems.

[0005] To achieve the above-mentioned purposes, the technical solutions adopted by the present application are as follows:

[0006] The utility model provides a kind of slope greening reinforcement equipment based on microbial mineralization, including mobile mechanism, the mobile mechanism is provided with the rack along the slope face operation, the rack is provided with the leveling mechanism for paving slope face, the leveling mechanism includes rotating disc, telescopic component, greening material introduction component and spraying component, and the telescopic component, greening material introduction component and spraying component are all arranged in rotating disc, the telescopic component is used to push greening material introduction component out rotating disc and then open ecological hole in slope face, the greening material introduction component is used to introduce ecological composite material into ecological hole, the greening material introduction component is further provided with cutting component on it, and the cutting component is used to cut ecological composite material, and the spraying component is used to mix bacteria liquid and cementing liquid on matrix soil to generate calcium carbonate cementing layer, and the ecological composite material is used to ensure seedling probability.

[0007] Further, the rotating disc includes base and cover plate, the telescopic component is installed in the center of base, the greening material introduction component and spraying component are both arranged in the inner cavity of base, the greening material introduction component is connected with telescopic component, the cover plate covers the inner cavity of base, and the cover plate is provided with through hole corresponding to greening material introduction component. When telescopic component is retracted, greening material introduction component is retracted synchronously, and the plane of greening material introduction component is flush with the plane of cover plate. There is no gap around through hole, which can prevent slope soil and sundries from invading the inner cavity during operation. When greening material introduction component is retracted, the rotating disc can clear and level slope surface through one side of cover plate, remove sundries such as floatstone and tree roots, and slightly compact loose slope surface. When greening material introduction component is extended, several ecological holes can be pressed on slope surface, which facilitates the planting of ecological composite material in the ecological holes, thereby reserving space and environment for greening crops to grow.

[0008] Further, the vegetation material introduction assembly comprises a base plate and a plurality of filling barrels, the plurality of filling barrels are arranged on the base plate at equal intervals, one end of the filling barrel penetrates through the base plate and is connected with the feeding assembly, the other end of the filling barrel can be movably penetrated through the penetration hole, the cutting assembly is arranged at the end of the filling barrel and is connected with the control unit through a lead wire. The base plate is connected with the output end of the telescopic assembly, the base plate is driven through the telescopic assembly, and all the filling barrels can be synchronously driven to perform unified extension and retraction actions, for simultaneously opening a plurality of ecological holes on the slope surface and filling the ecological holes. The rear end of the filling barrel is connected with the feeding assembly, the feeding assembly is arranged on the back of the leveling mechanism and serves as a temporary storage platform, and an external feeding pipeline is further connected with the feeding assembly, so that the continuous supply of the mixture is realized. The front end of the filling barrel serves as a discharge port and directly injects the material into the bottom of the ecological hole. The cutting assembly arranged at the end can adopt an electric cutter or a hot melt cutter, and the working principle is that when the filling barrel penetrates through the penetration hole, the leveling mechanism is pressed down, the cutting assembly is closed, and the ecological hole is opened on the slope surface through the pressure. After reaching the preset depth, the cutting assembly is opened, so that the front end of the filling barrel is opened. During the upward movement of the leveling mechanism, the ecological composite material at the front end is left in the ecological hole, until the front end of the filling barrel moves to the plane where the slope surface is located, and the cutting assembly is closed, so that the ecological composite material can be separated and cut, and the cutting assembly can also be used for the next soil breaking operation.

[0009] Further, the spraying assembly comprises a ring-shaped track, a sliding assembly and a spray head, the spray head is mounted on the sliding assembly, a driving unit is arranged on the sliding assembly, and the driving unit is connected with a control unit. The ring-shaped track is fixed on the rotating disc and provides a movement path for the spray head to perform a circular operation. Through the programming of the control unit, the spray head can complete multiple reciprocating scans within one rotation of the sliding assembly, so that the bacterial liquid and the cementing liquid are covered on the slope surface in a reticular or spiral path, the problems of uneven liquid amount in the dead angle and overlapping area of spraying are eliminated, the uniformity of the calcium carbonate cementing layer is ensured, and the reinforcement strength of the slope is improved.

[0010] Further, the annular track is fixedly embedded in the outer ring of the opening end of the base, the annular track is provided with two groups, two groups of the annular track are provided adjacent, two groups of the annular track are respectively provided with a spray head, two spray heads are symmetrically arranged about the axis of the base, and the spray paths of two spray heads coincide. The two independent spray heads on the two annular tracks respectively convey the bacterial liquid and the cementing liquid, the two spray heads are always symmetrically arranged about the axis and the spray paths coincide, that is, the rotating directions of the sliding assemblies are the same, the sliding assembly located in the outer ring has a slightly longer running path, and the rotating speed thereof is slightly faster, thereby ensuring that the two spray heads are always symmetric. Two liquid streams collide, shear and mix at the intersection point, and fully mix by using the kinetic energy thereof, and then are sprinkled to the slope. The application can avoid that calcium carbonate is deposited in the equipment to form deposition, and after the two reactants are fully mixed in the atomized state, the two reactants are uniformly landed on the slope, so that the reliability and uniformity of the reinforcement quality are improved. The spray head is installed on the rotating disc and can move along the annular track to form dynamic rotary spraying, and a composite track that continuously moves and scans can be formed. Dynamic rotary spraying enables liquid droplets to cover the slope from multiple angles and at different tangential speeds, which not only eliminates the spraying blind area and overlapping shadow, but also enables three-dimensional flow and wrapping to be realized on the micro-protrusions and concave landforms of the slope, thereby greatly improving the adhesion and uniformity of the liquid film to the complex slope.

[0011] Further, the rack is provided with a slide rail for vertical movement and longitudinal movement of the leveling mechanism, wherein the vertical direction is the vertical slope direction, and the longitudinal direction is the up-down direction along the slope, the rack is provided with a motor for driving the leveling mechanism to move, and the control unit is arranged on the rack. The leveling mechanism is provided with two, and the two leveling mechanisms are symmetrically arranged. The servo system composed of the slide rail and the motor controls the positioning and reciprocating movement of the leveling mechanism in the vertical and longitudinal directions. The vertical movement can adjust the vertical height of the rotating disc on the slope, that is, ensure that the spray liquid collection point of the spraying assembly is located above the ground level. The longitudinal movement is combined with the transverse movement of the moving mechanism to form a two-dimensional plane operation coverage network, so that the device can process each area on the slope, and there is no operation blind area.

[0012] Further, the ecological composite material is externally provided with an ecological degradation cylinder for wrapping it into a columnar shape, the ecological degradation cylinder is made of biodegradable material, and the ecological degradation cylinder is arranged in the filler cylinder of the vegetation material introduction assembly. The MICP technology forms calcium carbonate precipitation within 1-3 days, which cements soil particles and forms a dense hard shell on the slope. This hard shell hinders the germination of grass seeds and the breaking of seedlings. Secondly, the dense crust layer hinders the gas exchange between the soil and the atmosphere, and affects the infiltration and distribution of water. This causes the microenvironment of the grass seed root area to deteriorate, which is not conducive to its germination and root development. The ecological degradation cylinder has the characteristics of biodegradability, such as paper pulp and PLA. The cylinder wall is reticular or has certain pores, allowing part of the bacterial solution and nutrient solution to penetrate, while preventing a large amount of calcium carbonate crystals from invading and forming a dense blockage, maintaining the loose porous structure of the internal mixture, and creating an ideal water, gas and nutrient environment for seed germination. Subsequently, the ecological degradation cylinder material gradually softens and degrades after a few days. At the same time, the grass seeds in the cylinder begin to germinate in the wet, loose and nutrient-rich fiber bundle. The root system of the seedling can penetrate into the soil and expand in all directions, eventually penetrating through the degraded cylinder wall and forming a close root-soil-carbonate composite structure with the MICP reinforced body.

[0013] Further, the ecological composite material includes grass seeds, plant fibers, water-retaining agents and slow-release fertilizers, and the plant fibers are loose. The loose plant fibers can be coconut husk or hemp fiber, which form the matrix framework of the mixture, and their porous structure can absorb and store water and nutrients to provide a continuous and stable supply for seed germination. Secondly, it forms a flexible support in the ecological degradation cylinder, which is convenient for material introduction and cutting, and also provides a low-resistance channel for the initial extension of the seedling root system in the later stage. The water-retaining agent can absorb hundreds of times its own water and release it slowly during the drought interval, improving the drought survival rate of seedlings in harsh slope environments. The slow-release fertilizer can continuously supply nutrients for several months according to the growth needs of plants, avoiding the risk of rapid loss or seedling burn. Through reasonable proportioning of each component, the seed has a very high seedling probability in the preset ecological hole.

[0014] A method for using a slope vegetation reinforcement equipment based on microbial mineralization, comprising the following steps:

[0015] S1: driving the moving mechanism to move along the slope surface, removing debris and leveling the slope surface through the leveling mechanism, and compacting the loose slope surface;

[0016] S2: controlling the telescopic assembly to push the vegetation material introduction assembly out of the rotating disc to open ecological holes at equal intervals on the slope surface, introducing the ecological composite material into the ecological holes through the vegetation material introduction assembly, cutting the ecological composite material through the cutting assembly, and withdrawing the vegetation material introduction assembly from the ecological holes so that a section of the ecological composite material remains in the ecological holes;

[0017] S3: mixing the bacteria liquid and the cementing liquid in the air using the spraying assembly, and falling on the underlying matrix soil, the bacteria liquid and the cementing liquid react to generate a calcium carbonate cementing layer;

[0018] S4: after the spraying is completed, manually or mechanically spreading sandy loam or planting soil on the slope surface, the covering thickness is higher than that of the ecological composite material by 0.5cm-1cm, and then laying a degradable non-woven fabric or a plant fiber blanket on the covering soil.

[0019] Further, in the above step S1, the leveling mechanism keeps rotating during the operation, and the moving mechanism periodically stops when moving laterally along the slope, and the leveling mechanism vertically moves during the stop for leveling all positions of the slope surface, and the vertical reciprocating movement of the leveling mechanism and the unidirectional movement of the moving mechanism end as a cycle, until the flatness of the slope surface reaches the requirement, that is, step S2 can be performed;

[0020] Step S2 also controls the lateral movement of the moving mechanism and the vertical reciprocating movement of the leveling mechanism, and the ecological composite material is introduced into the ecological hole by the vegetation material introduction assembly, the leveling mechanism stops rotating to ensure the insertion and withdrawal of the vegetation material introduction assembly, until the entire slope surface completes step S2, and then step S3 is entered;

[0021] The moving mechanism and the leveling mechanism of step S3 are the same as the execution mode of step S1, until the calcium carbonate cementing layer is sprayed on the slope surface, and finally the surface covering operation is performed.

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] 1、The vegetation material introduction assembly of the present application mechanically opens ecological holes in the slope surface and fills the mixture containing grass seeds, which reserves a growth channel for plant growth, and can avoid the calcium carbonate cementing layer generated to hinder seed germination and seedling breaking soil, thereby ensuring the survival environment of grass seeds and other vegetation crops;

[0024] 2、The spraying assembly with independent nozzles and overlapping spraying paths of the present application realizes the instantaneous mixing of the bacteria liquid and the cementing liquid after leaving the equipment and before contacting the slope surface, avoids the pipeline blockage caused by early mixing, ensures the continuous and stable operation of the equipment, and can also increase the uniformity of the slope spraying;

[0025] 3、The rotating disc integrating the leveling slope, the vegetation material introduction assembly and the spraying assembly of the present application integrally completes the time-sequencing operation process of slope treatment, hole opening and filling, liquid spraying and shell forming, reduces the labor and material costs, improves the timeliness of construction operation, and can significantly enhance the integrity and long-term stability of the root, soil and calcium carbonate composite, and realize the synergistic effect of short-term mechanical reinforcement and long-term ecological harmony. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 This is a schematic diagram of the construction operation of the present invention;

[0027] Figure 2 This is a schematic diagram of the first structure of the leveling mechanism;

[0028] Figure 3 This is a schematic diagram of the second structure of the leveling mechanism;

[0029] Figure 4 This is a schematic diagram of the disassembled structure of the leveling mechanism;

[0030] Figure 5 This is a plan view of the leveling mechanism;

[0031] Attached diagram labels: 1-Moving mechanism, 2-Frame, 3-Leveling mechanism, 4-Rotating disc, 401-Base, 402-Cover plate, 5-Telescopic component, 6-Planting material introduction component, 601-Base plate, 602-Filling cylinder, 7-Spraying component, 701-Circular track, 702-Nozzle, 8-Cutting component, 9-Through hole, 10-Feeding component. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0033] Example 1, as Figures 1-5 As shown, the present invention discloses a slope vegetation reinforcement device based on microbial mineralization, including a mobile mechanism 1. The mobile mechanism 1 is equipped with a frame 2 for working along the slope. The frame 2 is equipped with a leveling mechanism 3 for spreading the slope surface. The leveling mechanism 3 includes a rotating disk 4, a telescopic component 5, a vegetation material introduction component 6, and a spraying component 7. The telescopic component 5, the vegetation material introduction component 6, and the spraying component 7 are all arranged inside the rotating disk 4. The telescopic component 5 is used to push the vegetation material introduction component 6 out of the rotating disk 4 to open ecological holes on the slope surface. The vegetation material introduction component 6 is used to introduce ecological composite materials into the ecological holes. The vegetation material introduction component 6 is also equipped with a cutting component 8 for cutting the ecological composite materials. The spraying component 7 is used to mix bacterial liquid and cementing liquid on the substrate soil to generate a calcium carbonate cementing layer.

[0034] The rotating disc 4 comprises a base 401 and a cover plate 402, the telescopic assembly 5 is installed in the center of the base 401, the vegetation material introduction assembly 6 and the spraying assembly 7 are arranged in the inner cavity of the base 401, the vegetation material introduction assembly 6 is connected with the telescopic assembly 5, the cover plate 402 covers the inner cavity of the base 401, and the cover plate 402 is provided with a through hole 9 corresponding to the vegetation material introduction assembly 6. Specifically, when the telescopic assembly 5 is retracted, the vegetation material introduction assembly 6 is retracted, and the plane of the vegetation material introduction assembly 6 is flush with the plane of the cover plate 402. The periphery of the through hole 9 is seamless, which can prevent the invasion of soil and sundries on the slope surface into the inner cavity during operation. During the retraction of the vegetation material introduction assembly 6, the rotating disc 4 can clear the surface of the slope through one side of the cover plate 402, and remove sundries such as floating stones and tree roots. For loose slope surfaces, slight compaction can be performed. When the vegetation material introduction assembly 6 is extended, several ecological holes can be pressed on the slope surface, which facilitates the planting of ecological composite materials therein, thereby reserving space and environment for the growth of vegetation crops.

[0035] The vegetation material introduction assembly 6 comprises a base plate 601 and a plurality of filling barrels 602, the plurality of filling barrels 602 are arranged at equal intervals on the base plate 601, one end of the filling barrel 602 penetrates the base 401 and is connected with the feeding assembly 10, the other end of the filling barrel 602 can be movably inserted into the through hole 9, and the cutting assembly 8 is arranged at the end of the filling barrel 602 and is connected with a control unit through a wire. Specifically, the base plate 601 is connected with the output end of the telescopic assembly 5, the base plate 601 is driven through the telescopic assembly 5, and all the filling barrels 602 can be synchronously driven to perform unified extension and retraction actions, which are used for simultaneously opening a plurality of ecological holes on the slope surface and filling the ecological holes. The rear end of the filling barrel 602 is connected with the feeding assembly 10, the feeding assembly 10 is arranged on the back of the leveling mechanism 3 and serves as a temporary storage platform, and an external feeding pipeline is further connected, thereby realizing continuous supply of the mixture. The front end of the filling barrel 602 serves as a discharge port and directly injects the material into the bottom of the ecological hole. The cutting assembly 8 arranged at the end can adopt an electric cutter or a hot melt cutter, and the working principle is that when the filling barrel 602 is inserted into the through hole 9, the leveling mechanism 3 is pressed down, the cutting assembly 8 is closed, and the ecological hole is opened on the slope surface through the pressure. After reaching the preset depth, the cutting assembly 8 is opened, so that the front end of the filling barrel 602 is opened. During the upward movement of the leveling mechanism 3, the ecological composite material at the front end is left in the ecological hole until the front end of the filling barrel 602 moves to the plane where the slope surface is located, and the closure of the cutting assembly 8 can separate and cut the ecological composite material and can also be used for the next soil breaking operation. Preferably, the front end of the cutting assembly 8 is provided with a beveled or pointed soil breaking block, which increases the soil breaking effect and capacity during the downward movement of the leveling mechanism 3, thereby reducing power consumption and improving the efficiency of opening the ecological hole.

[0036] The spraying assembly 7 comprises an annular track 701, a sliding assembly and a spray head 702, the spray head 702 is installed on the sliding assembly, the sliding assembly is provided with a driving unit, and the driving unit is connected with a control unit. Specifically, the annular track 701 is fixed on the rotating disc 4, and provides a movement path for the spray head 702 to surround the work. Through the programming of the control unit, the spray head 702 can complete multiple reciprocating scans within one rotation of the sliding assembly, so as to cover the slope with the bacterial liquid and the cementing liquid in a reticular or spiral path, eliminate the problem of uneven liquid volume in the dead angle and overlapping area of spraying, and ensure the uniformity of the calcium carbonate cementing layer, thereby improving and strengthening the strength of the slope. The rear end of the spray head 702 is connected with a liquid supply assembly through a conduit, the liquid supply assembly is arranged on the back of the leveling mechanism 3 and serves as a temporary storage platform, and the liquid supply assembly is further connected with a liquid supply pipeline outside, thereby realizing the continuous supply of the solution (bacterial liquid and cementing liquid). Preferably, vortex blades are designed in the interior of the spray head 702, so that the two liquid streams produce intense shearing and turbulence, and realize instantaneous and sufficient mixing.

[0037] The annular track 701 is fixedly embedded in the opening end outer ring of the base 401, the annular track 701 is provided with two groups, two groups of the annular track 701 are provided adjacent, two groups of the annular track 701 are respectively provided with a spray head 702, two spray heads 702 are symmetrically arranged about the axis of the base 401, and the spray paths of the two spray heads 702 coincide. Specifically, the independently controlled spray heads 702 on the two annular tracks 701 respectively transport the bacterial liquid and the cementing liquid, the two spray heads 702 are always symmetrically arranged about the axis and the spray paths coincide, that is, the rotation directions of the sliding assemblies are the same, the sliding assembly located in the outer ring has a slightly longer running path, and the rotation speed thereof is slightly faster, thereby ensuring that the two spray heads 702 are always symmetrical. Two liquid streams collide, shear and mix at the intersection point, and fully mix by using their own kinetic energy, and then are sprinkled to the slope. Compared with the conventional scheme of pre-mixing the bacterial liquid and the cementing liquid in a storage tank or pipeline, the application avoids the deposition of calcium carbonate in the equipment (such as pumps, valves, pipelines or nozzles). In addition, compared with the step-by-step construction method of spraying the bacterial liquid first and then spraying the cementing liquid, the bacterial liquid sprayed first may flow or be unevenly distributed due to the slope of the slope, substrate adsorption or wind action, resulting in that the subsequent cementing liquid cannot match the bacterial liquid, forming a weak reinforcement area. The present scheme fully mixes the two reactants in the atomized state and then uniformly falls on the slope, ensuring that any point is a complete reaction system, and improving the reliability and uniformity of the reinforcement quality. In the present application, the spray head 702 is installed on the rotating disc and can move along the annular track to form dynamic rotary spraying. Compared with static spraying with a fixed angle, the advantage is that it can form a composite track that moves and scans continuously. Fixed spraying forms a concentrated high liquid area directly below it, which may cause uneven coverage in the front and back directions due to insufficient or excessive overlap. Dynamic rotary spraying enables liquid droplets to cover the slope from multiple angles at different tangential speeds, which not only eliminates the spraying blind area and overlapping shadow, but also enables three-dimensional flow and wrapping around the micro-protrusions and depressions on the slope, greatly improving the adhesion and uniformity of the liquid film on the complex slope.

[0038] Preferably, the spray pressure of one of the spray heads 702 is increased by the control unit, and increasing the spray intensity will make the liquid flow faster, and when it collides with the other liquid flow with normal pressure, it will produce stronger shear effect, resulting in smaller particle size of the mixed liquid droplets and better atomization effect. First, improve the uniformity of the coverage area, and finer droplets can better fill the micro-pores to form a coverage film without blind areas. Second, enhance the penetration ability, and small droplets can more easily invade the capillary pores of the soil surface layer, realize deeper and faster infiltration, and thus optimize the transmission and reaction kinetics of the reactants in the soil matrix, promote the precipitation of calcium carbonate in a wider depth range, and enhance the reinforcement depth and the overall integrity of the soil body.

[0039] The rack 2 is provided with slide rails for vertical movement and longitudinal movement of the leveling mechanism 3, wherein the vertical direction is the vertical slope direction, and the longitudinal direction is the up and down direction along the slope. The rack 2 is provided with a motor for driving the leveling mechanism 3 to move. The control unit is arranged on the rack 2. Specifically, the leveling mechanism 3 is provided with two leveling mechanisms 3, which are symmetrically arranged. Through the servo system composed of the slide rails and the motor, the control unit drives the leveling mechanism 3 to position and reciprocate in the vertical direction (vertical slope direction) and the longitudinal direction (up and down direction along the slope). The vertical movement can adjust the vertical height of the rotating disc 4 on the slope, that is, ensure that the spray liquid collection point of the spraying assembly 7 is located above the ground level. The longitudinal movement is combined with the transverse movement of the moving mechanism 1 to form a two-dimensional plane operation coverage network, so that the device can process every area on the slope, and there is no operation blind area. It ensures that whether it is leveling, hole opening or spraying, it can be executed at any position on the slope, thereby ensuring that the final formed vegetation composite structure has uniform quality and performance as a whole.

[0040] The ecological composite material is externally provided with an ecological degradation cylinder for wrapping it into a cylindrical shape. The ecological degradation cylinder is made of biodegradable material, and is arranged in the filler cylinder 602 of the vegetation material guide assembly 6. Specifically, the MICP technology forms calcium carbonate precipitation which cements soil particles within 1-3 days, forming a dense hard shell on the slope. This hard shell greatly hinders the germination of grass seeds and the breaking of seedlings. Secondly, the dense shell layer hinders the gas exchange between the soil and the atmosphere, and also affects the infiltration and distribution of water. This causes the microenvironment of the grass seed root area to deteriorate, which is not conducive to its germination and root development. The ecological degradation cylinder is used to solve the contradiction that the hard shell hinders growth and achieve long-term synergistic effect. Through its biodegradable properties such as paper pulp and PLA, the cylinder wall is reticular or has certain porosity, allowing part of the bacterial liquid and nutrient liquid to penetrate, while blocking a large amount of calcium carbonate crystals from invading and forming a dense blockage, maintaining the loose porous structure of the internal mixture, creating an ideal water, gas and fertilizer environment for seed germination. Subsequently, in the natural environment, the ecological degradation cylinder material gradually softens and degrades after a few days. At the same time, the grass seeds in the cylinder begin to germinate in the wet, loose and nutrient-rich fiber bundle. The root system of the seedling can penetrate the soil without hindrance and expand to all directions, and finally penetrate the degraded cylinder wall and form a close root, soil and calcium carbonate composite structure with the MICP reinforced body. The degradation of the ecological degradation cylinder not only does not form an obstacle, but also guides the root system to interweave more firmly with the surrounding cemented soil after penetrating the cylinder wall. This realizes the natural transition from germination to firm anchoring, and finally forms a multi-element synergistic reinforcement system of deep root anchoring, calcium carbonate cementing and fiber reinforcement.

[0041] The ecological composite material comprises grass seeds, plant fibers, water-retaining agents and slow-release fertilizers. The plant fibers are loose in structure. Specifically, the loose plant fibers can be coconut husk or hemp fibers, which form the matrix framework of the mixture. The porous structure of the matrix framework can absorb and store water and nutrients, and provide a continuous and stable supply for seed germination. Secondly, the matrix framework forms a flexible support in the ecological degradation cylinder, which facilitates material guiding and cutting. In addition, the matrix framework provides a low-resistance channel for the initial extension of the root system of the seedling in the later period. The water-retaining agent can absorb hundreds of times of its own water and slowly release the water during the drought interval, thereby improving the drought resistance and survival rate of the seedling in the harsh slope environment. The slow-release fertilizer can continuously supply nutrients for several months according to the growth needs of the plant, thereby avoiding the risk of rapid loss or seedling burning and supporting the healthy planting and sustainable development of the plant. Through reasonable proportioning of the components, the seed has a high seedling formation probability in the preset ecological hole.

[0042] In the embodiment two, based on the embodiment one, the embodiment two provides a use method of the slope vegetation reinforcing equipment based on microbial mineralization, and specifically includes the following steps.

[0043] S1: driving the moving mechanism 1 to move along the slope surface, removing sundries and leveling the slope surface through the leveling mechanism 3, and compacting the loose slope surface;

[0044] S2: controlling the telescopic assembly 5 to push the vegetation material guide assembly 6 out of the rotating disc 4 to open the ecological holes at equal intervals on the slope surface, guiding the ecological composite material into the ecological holes through the vegetation material guide assembly 6, cutting the ecological composite material through the cutting assembly 8, and withdrawing the vegetation material guide assembly 6 from the ecological hole so that a section of the ecological composite material remains in the ecological hole;

[0045] S3: mixing the bacteria liquid and the cementing liquid in the air through the spraying assembly 7 and falling on the matrix soil below, so that the bacteria liquid and the cementing liquid react to generate a calcium carbonate cementing layer. Although part of the calcium carbonate cementing layer covers the top surface of the ecological composite material, the top surface of the ecological degradation cylinder is only slightly solidified and far from the dense degree that hinders germination. The circumference and the bottom of the ecological degradation cylinder can ensure the free growth of the root system of the vegetation.

[0046] S4: after the spraying is completed, the slope surface is spread with sandy loam or planting soil manually or mechanically, the covering thickness is higher than 0.5cm-1cm of the ecological composite material, and then the degradable non-woven fabric or plant fiber blanket is laid on the covering soil.

[0047] In the embodiment three, based on the embodiment two, the embodiment three provides a specific implementation step of the use method of the slope vegetation reinforcing equipment based on microbial mineralization.

[0048] In step S1, the leveling mechanism 3 keeps rotating, the moving mechanism 1 moves along the slope transversely and stops periodically, the control of the vertical movement of the leveling mechanism 3 is performed during the stop period, the leveling work is performed on all positions of the slope surface, the vertical reciprocating movement of the leveling mechanism 3 and the unidirectional movement of the moving mechanism 1 end as a cycle, and the slope surface is leveled to the required degree until step S2 is performed.

[0049] Specifically, the periodic stop of the moving mechanism 1 provides a stable platform for the fine vertical reciprocating movement of the leveling mechanism 3, ensures the compaction and leveling of each part of the slope surface, and creates a prerequisite for the subsequent consistency of the hole depth and uniformity of the liquid spraying. Defining the transverse movement and vertical scanning as a work cycle makes the entire pretreatment process systematic and programmed.

[0050] In step S2, the moving mechanism 1 moves transversely and the vertical reciprocating movement of the leveling mechanism 3 is controlled, the ecological composite material is introduced into the ecological hole by the ecological composite material introduction assembly 6, the leveling mechanism stops rotating to ensure the insertion and withdrawal of the ecological composite material introduction assembly 6, and then step S3 is performed.

[0051] Specifically, on the leveled base surface provided in step S1, the uniformity and standardization of the ecological hole distribution are ensured along the movement track. When the ecological composite material introduction assembly 6 is in action, the leveling mechanism 3 stops rotating to eliminate the large centrifugal force and vibration caused by rotation, provides a stable working condition for the telescopic assembly 5, and enables the filler cylinder 602 to be inserted into the soil vertically and accurately to form ecological holes with smooth walls and standard depth, and precise filling and cutting are completed in this stable state.

[0052] In step S3, the moving mechanism 1 and the leveling mechanism 3 are operated in the same mode as in step S1 until the calcium carbonate cementing layer is sprayed on the slope surface, and then the surface covering operation is performed.

[0053] Specifically, the continuous rotation of the rotating disc 4, combined with the track movement of the spray head 702, forms a dynamic and composite spraying field, so that the bacteria liquid and the cementing liquid can cover and penetrate into the soil surface in the best way. The subsequent surface covering operation provides germination conditions for the grass seeds and prevents them from being eaten by birds. As a buffer layer, it reduces water evaporation and preserves soil moisture for MICP reaction and seed germination. In addition, it can effectively prevent the newly formed cementing layer from being directly washed away by rainwater in the early stage.

[0054] In example four, based on example two, the ecological degradation cylinder optimization scheme of controllable degradation and fertilizer efficiency synergy based on the use method of the slope vegetation reinforcement equipment of microbial mineralization is proposed.

[0055] The porosity of the eco-degradation cylinder is controlled between 30%-50%. This range of porosity can ensure that the external bacteria solution and nutrient solution have enough channels to penetrate into the cylinder, activate the MICP reaction and nourish the grass seeds, and at the same time maintain the structural integrity of the cylinder body to avoid premature disintegration due to pressure or scouring at the initial stage of construction. The pore size is limited to 0.1mm-0.5mm. This pore size range is set according to the typical size of calcium carbonate crystals (usually greater than 1 pm, i.e. 0.001 mm). It can effectively block the accumulation of a large amount of calcium carbonate crystals in the cylinder to form a dense blockage, while allowing water molecules, ions and microorganisms to pass freely, thereby maintaining the connectivity between the inside and outside of the cylinder at the molecular and microbial level. The thickness of the cylinder wall is designed to be 2mm-5mm. This thickness provides sufficient mechanical support for grass seed germination and early seedling growth to resist external slight impact and soil pressure, while ensuring that it can be completely degraded within the preset time range and will not form a physical barrier to long-term root expansion.

[0056] The function of the eco-degradation cylinder is precisely synchronized with the MICP reaction process and the plant growth cycle, and is divided into three stages:

[0057] STEP1: 0-7 days after construction, complete protection period, in this stage, the eco-degradation cylinder maintains its structural integrity, and its core function is to create an independent microhabitat for grass seeds that is not compressed by the overall hard shell layer formed by MICP. The loose fiber matrix inside the cylinder retains water and fertilizer, providing ideal conditions for seed germination. At the same time, the MICP reaction is carried out intensively outside the cylinder, and its byproduct ammonium ions penetrate into the interior through the pores of the cylinder wall. These ammonium ions can be used as efficient nitrogen fertilizer, which is converted by microorganisms into nitrate nitrogen that can be absorbed by plants, providing nutrition for grass seed germination and early growth.

[0058] STEP2: 7-14 days after construction, softening penetration period, the eco-degradation cylinder material begins to soften and swell, and the mechanical strength decreases significantly. At this time, the grass seeds inside the cylinder have germinated, and the seedling roots have begun to grow. The softened cylinder wall provides a low-resistance penetration path for the roots, guiding the roots to grow outward. At this stage, the cylinder body still plays a partial positioning and buffering role, but no longer restricts the development of the roots.

[0059] STEP3: 14-30 days after construction, complete fusion period, at this time the eco-degradation cylinder material is completely degraded, leaving no physical residue in situ. The seedling roots have successfully penetrated and expanded into the surrounding MICP reinforced soil. The organic matter produced by degradation further improves the rhizosphere microenvironment. At this time, the roots and the soil particles cemented by calcium carbonate are tightly intertwined and mutually anchored, forming a calcium carbonate composite structure that combines organic life and inorganic cementation.

[0060] Of course, the present application can have other various embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present application without departing from the spirit and essence of the present application, and these corresponding changes and modifications shall all belong to the protection scope of the claims of the present application.

Claims

1. A slope vegetation reinforcement device based on microbial mineralization, comprising a mobile mechanism (1), wherein a frame (2) for working along the slope is provided on the mobile mechanism (1), and a leveling mechanism (3) for spreading the slope surface is provided on the frame (2), characterized in that: The leveling mechanism (3) includes a rotating disk (4), a telescopic component (5), a vegetation material introduction component (6), and a spraying component (7). The telescopic component (5), the vegetation material introduction component (6), and the spraying component (7) are all located inside the rotating disk (4). The telescopic component (5) is used to push the vegetation material introduction component (6) out of the rotating disk (4) to open ecological holes on the slope. The vegetation material introduction component (6) is used to introduce ecological composite material into the ecological holes. The vegetation material introduction component (6) is also provided with a cutting component (8) for cutting ecological composite material. The spraying component (7) is used to mix bacterial liquid and cementing liquid on the substrate soil to generate a calcium carbonate cementing layer. The ecological composite material is used to ensure the seedling survival rate. The rotating disk (4) includes a base (401) and a cover plate (402). The spraying assembly (7) includes an annular track (701), a sliding assembly, and a nozzle (702). The nozzle (702) is mounted on the sliding assembly. The annular track (701) is fixedly embedded in the outer ring of the open end of the base (401). Two sets of annular tracks (701) are provided, and the two sets of annular tracks (701) are arranged adjacent to each other. A nozzle (702) is provided on each of the two sets of annular tracks (701). The nozzles (702) are symmetrically arranged about the axis of the base (401), and the spray paths of the two nozzles (702) overlap. The frame (2) is provided with a slide rail for the leveling mechanism (3) to move vertically and longitudinally, wherein the vertical direction is perpendicular to the slope and the longitudinal direction is along the up and down of the slope. The frame (2) is provided with a motor for driving the leveling mechanism (3) to move. The sliding assembly is provided with a drive unit, and the drive unit is connected to a control unit, which is located on the frame (2).

2. The slope vegetation reinforcement device based on microbial mineralization according to claim 1, characterized in that: The telescopic component (5) is installed in the center of the base (401). The vegetation material introduction component (6) and the spraying component (7) are both located in the inner cavity of the base (401). The vegetation material introduction component (6) is connected to the telescopic component (5). The cover plate (402) covers the inner cavity of the base (401). The cover plate (402) is provided with a through hole (9) corresponding to the vegetation material introduction component (6).

3. The slope vegetation reinforcement device based on microbial mineralization according to claim 2, characterized in that: The plant material introduction component (6) includes a substrate (601) and a plurality of filler tubes (602), wherein the plurality of filler tubes (602) are arranged at equal intervals on the substrate (601).

4. The slope vegetation reinforcement device based on microbial mineralization according to claim 3, characterized in that: One end of the packing cylinder (602) passes through the base (401) and is connected to the feeding assembly (10). The other end of the packing cylinder (602) can be movably passed through the through hole (9). The cutting assembly (8) is located at the end of the packing cylinder (602) and is connected to the control unit via a wire.

5. The slope vegetation reinforcement device based on microbial mineralization according to claim 3, characterized in that: The ecological composite material is provided with an ecological degradation tube for wrapping it into a cylindrical shape. The ecological degradation tube is made of biodegradable material and is placed inside the filler tube (602) of the vegetation material introduction component (6).

6. The slope vegetation reinforcement device based on microbial mineralization according to claim 1, characterized in that: The ecological composite material includes grass seeds, plant fibers, water-retaining agents, and slow-release fertilizers, wherein the plant fibers have a loose structure.

7. A method of using the slope vegetation reinforcement equipment based on microbial mineralization as described in any one of claims 1-6, characterized in that, Includes the following steps: S1: Drive the moving mechanism (1) to move along the slope direction, and use the leveling mechanism (3) to remove debris and level the slope, while compacting the loose slope. S2: Control the telescopic component (5) to push the vegetation material import component (6) out of the rotating disk (4), open ecological holes at equal intervals on the slope, the vegetation material import component (6) introduces the ecological composite material into the ecological hole, and cuts the ecological composite material through the cutting component (8), the vegetation material import component (6) exits the ecological hole, so that a section of ecological composite material remains in the ecological hole; S3: Using the spraying assembly (7), the bacterial solution and cementing solution are mixed in the air and fall onto the substrate soil below. The bacterial solution and cementing solution react to generate a calcium carbonate cementing layer. S4: After spraying, spread sandy loam or planting soil on the slope manually or mechanically, with a covering thickness 0.5cm-1cm higher than the ecological composite material. Then lay biodegradable non-woven fabric or plant fiber blanket on the covering soil.

8. The method of use according to claim 7, characterized in that: In step S1 above, the leveling mechanism (3) rotates during operation, and the moving mechanism (1) stops periodically when it moves laterally along the slope. During the stop, the leveling mechanism (3) is controlled to move vertically to level all positions on the slope. The vertical reciprocating motion of the leveling mechanism (3) and the unidirectional movement of the moving mechanism (1) are considered as one cycle until the slope flatness meets the requirements, then step S2 can be performed. Step S2 also controls the horizontal movement of the moving mechanism (1) and the vertical reciprocating movement of the leveling mechanism (3). During the process of the vegetation material introduction component (6) introducing the ecological composite material into the ecological hole, the leveling mechanism (3) stops rotating to ensure the insertion and withdrawal of the vegetation material introduction component (6) until step S2 is completed on the entire slope, and then proceeds to step S3. The moving mechanism (1) and leveling mechanism (3) in step S3 are executed in the same way as in step S1, until the slope is covered with a calcium carbonate cementing layer, and finally the surface soil covering operation is carried out.

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