Construction method and device for reinforcing slope by EICP-vegetation cooperation

Abstract

This invention relates to the field of slope reinforcement technology, and particularly to a construction method for EICP-vegetation synergistic slope reinforcement, comprising the following steps: S1: Slope pretreatment, removing debris and trimming the gentle slope, and excavating a drainage ditch; S2: Preparing a urease solution and a cementing solution; the urease solution has an activity of 1000-1500 U / L and a concentration of 0.5-0.8 g / L; the cementing solution is a mixture of calcium chloride and urea, both with a concentration of 1-1.5 mol / L; S3: Spraying EICP slurry using a dual-chamber spraying device, the urease solution and cementing solution are mixed instantly through a mixing nozzle, and sprayed in 2-3 times to form a cemented surface layer; S4: After standing for 24-48 hours, washing with water to remove salt using a high-pressure water truck, rinsing twice, with a total water volume of 4 times the total volume of the EICP slurry. This invention achieves independent storage and transportation of urease solution and cementing solution and timely mixing at the nozzle through a dual-chamber dispensing spraying device, fundamentally avoiding the blockage problem caused by premature reaction of slurry in pipeline, and ensuring the continuity and uniformity of EICP slurry spraying.

Description

Technical Field

[0001] This invention relates to the field of slope reinforcement technology, and in particular to a construction method and apparatus for EICP-vegetation synergistic slope reinforcement. Background Technology

[0002] Loose surface soil on slopes, susceptible to erosion by rainwater, poses a common stability and ecological restoration challenge in highway, railway, and mining engineering projects. Traditional slope reinforcement methods mainly include engineering reinforcement (such as retaining walls and anchor bolts) and ecological slope protection (such as vegetation restoration and vegetation mats). In recent years, enzyme-induced calcium carbonate precipitation (EICP) technology has attracted attention due to its ability to effectively cement soil particles and improve soil strength. However, EICP technology still faces the following prominent problems in engineering applications:

[0003] Problems with slurry mixing and spraying: In the traditional EICP process, urease solution and cementitious liquid are prone to premature mixing and reaction during storage and transportation, which can lead to pipeline blockage, uneven spraying, and affect the reinforcement effect.

[0004] Residual ions inhibit vegetation growth: Chloride ions (Cl) produced after the EICP reaction - ) and ammonium ions (NH4) + High residual concentration in soil (usually Cl) - >0.5%, NH4 + >0.3% will disrupt the osmotic balance of plant roots, significantly reducing seed germination rate and vegetation survival rate;

[0005] Poor integration with vegetation slope protection technology: If the cementing layer formed by EICP is not properly treated, it will hinder the contact between seeds and soil, affect vegetation planting, and result in poor ecological restoration.

[0006] It is difficult to balance initial erosion resistance with long-term ecological stability: a single EICP reinforcement layer may weaken over time due to environmental factors, while simple vegetation slope protection is insufficient in the early stages of root development.

[0007] While some existing technologies have attempted to combine EICP with vegetation, these often suffer from problems such as disconnected processes, incompatible equipment, and inadequate control of ion residues. A systematic, efficient, and eco-friendly synergistic reinforcement system has yet to be established.

[0008] Therefore, there is an urgent need to develop a method and special equipment that can achieve integrated construction of "EICP slurry instant mixing - water washing and desalination and simultaneous spraying of seeds" to solve the above-mentioned technical bottlenecks and achieve synergistic effects of slope mechanical reinforcement and ecological restoration. Summary of the Invention

[0009] To address the technical problems mentioned in the background section, this invention provides a construction method and apparatus for EICP-vegetation synergistic slope reinforcement.

[0010] This invention is achieved using the following technical solution: a construction method for EICP-vegetation synergistic slope reinforcement, comprising the following steps:

[0011] S1: Slope pretreatment, removal of debris and trimming of gentle slopes, excavation of intercepting ditches;

[0012] S2: Prepare urease solution and cementing solution; the urease solution has an activity of 1000-1500 U / L and a concentration of 0.5-0.8 g / L; the cementing solution is a mixture of calcium chloride and urea, both with a concentration of 1-1.5 mol / L;

[0013] S3: Use a dual-chamber injection spraying device to spray EICP slurry. The urease solution and cementing solution are mixed instantly through a mixing nozzle and sprayed in 2 to 3 times to form a cemented surface layer.

[0014] S4: After standing for 24–48 hours, use a high-pressure water truck to wash and desalinate the slurry, rinsing twice with a total water volume of 4 times the total volume of the EICP slurry. Detect Cl. - ≤0.15%, NH4 + ≤0.1%;

[0015] S5: Plant seeds are made into a suspension and sprayed evenly on the slope through an atomizing nozzle, then covered with non-woven fabric;

[0016] S6: Post-construction watering and maintenance, monitoring the condition of vegetation and cementing layer.

[0017] Furthermore, in step S3: the single spraying volume is 0.5 to 1.0 L / m², the nozzle moving speed is 0.5 to 1 m / s, the nozzle distance from the slope is 50 to 80 cm, and the overlap width of adjacent spraying strips is 10 to 15 cm.

[0018] In step S4: the water washing pressure is 0.2-0.3 MPa, the total water volume is 2-4 L / m², and the rinsing is done in two sessions with an interval of 12 hours.

[0019] Furthermore, in step S5: the seeds are bermudagrass and tall fescue, with a weight ratio of 7:3; the suspension concentration is 50-100 g / L, the spraying dosage is 10-15 g / m², and the atomizing nozzle orifice diameter is 1-2 mm;

[0020] For the first two weeks, water the soil 2-3 times a week, keeping the soil moisture content at 20%-25%; remove the non-woven fabric when the seed germination rate reaches 50%.

[0021] The present invention also proposes a construction device for implementing the method of EICP-vegetation synergistic slope reinforcement, comprising:

[0022] The dual-chamber storage unit includes a urease chamber and a cementation chamber;

[0023] A dual-pump linkage system is used to control the flow rate and pressure of liquid in both chambers;

[0024] The delivery pipeline connects the dual-chamber liquid storage unit to the mixing and spraying mechanism;

[0025] A mixing spraying mechanism includes a box body and a top cover. An inner liner is detachably connected to the box body, and one end of the box body is connected to a connecting pipe that communicates with a delivery pipeline. A docking hole communicating with the connecting pipe is opened on the inner side of the inner liner.

[0026] The other end of the box is detachably connected to the top cover. A stirring motor is installed in the middle of the top cover. The output end of the stirring motor is connected to a stirring shaft that extends into the inner liner. Several stirring rods are distributed on the stirring shaft.

[0027] Furthermore, the outer periphery of the box body near the top cover is provided with a screw hole, and the top cover is provided with a tightening section that screws into the screw hole. The end face of the box body near the top cover is also provided with a groove, and the end of the inner liner is provided with a flange that can be inserted into the groove. Several mounting holes are distributed circumferentially on the bottom surface of the groove, and each mounting hole is provided with an elastic mechanism to push the inner liner outward after the top cover is separated from the box body.

[0028] Furthermore, the elastic mechanism includes a spring disposed in the mounting hole, a push rod connected to the spring, and the outer end of the push rod abutting against the flange.

[0029] Furthermore, a backstop mechanism is slidably mounted at the end of the stirring shaft along its axial direction, and an adjustment mechanism is mounted on the side of the box away from the top cover. The adjustment mechanism can change the position of the backstop mechanism to block the docking hole. The backstop mechanism includes a sliding rod that is slidably connected to the stirring shaft along its axial direction and a blocking plate fixed to the end of the sliding rod.

[0030] Furthermore, the adjustment mechanism includes a bottom cover detachably connected to the box body, a battery disposed in the bottom cover, and an electromagnet electrically connected to the battery. The box body and the inner liner are respectively provided with interconnected holes one and two. Part of the electromagnet is installed in holes one and two. The blocking plate is magnetic and can be attracted to the electromagnet.

[0031] Furthermore, the dual-pump linkage system is controlled by a PLC, with a flow ratio of 1:1 between the two chambers and a working pressure of 0.3-0.5MPa; the inner diameter of the delivery pipeline is 20-30mm, the pipe wall is equipped with an electromagnetic flow sensor, the pipe joint adopts double compression fitting seal, and the leakage is ≤0.1mL / min.

[0032] Furthermore, the dual-pump linkage system integrates a pressure protection module, which automatically shuts down when the pressure in a single chamber is greater than 0.55 MPa; the chamber wall of the dual-chamber liquid storage unit is equipped with a liquid level sensor for real-time monitoring of the remaining slurry volume.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0034] This invention utilizes a dual-chamber dispensing spraying device to achieve independent storage and transportation of urease solution and cementing solution, as well as instant mixing at the nozzle. This fundamentally avoids the blockage problem caused by premature reaction of the slurry in the pipeline, ensuring the continuity and uniformity of EICP slurry spraying. The device adopts an integrated and modular design, organically integrating functions such as dual-chamber storage, dual-pump linkage, real-time mixing, intelligent monitoring, and safety protection. It not only achieves precise PLC control of slurry ratio, flow rate, and pressure, but also improves the controllability and equipment reliability of the construction process through liquid level monitoring and pressure protection modules, thereby ensuring the stability and reproducibility of EICP reinforcement quality at the system level. Using approximately four times the total volume of water for multiple pressurized flushing can remove residual Cl after the reaction. - and NH4 + The concentration was effectively reduced to below the thresholds of ≤0.15% and ≤0.1%, significantly eliminating the osmotic stress and toxic effects of high-concentration ions on plant roots, thus ensuring seed germination rate and vegetation survival rate. Through an optimized process design of "EICP spraying → water washing for desalination → seed spraying," a seamless integration of mechanical reinforcement and ecological restoration processes was achieved. This allows the early-formed EICP cementing layer to effectively resist slope erosion while creating a suitable environment for later root establishment and development. The two processes complement each other in terms of time and function, synergistically enhancing the long-term stability and ecological restoration effect of the slope. In particular, the backflow prevention mechanism in the device can quickly seal the inlet of the mixing chamber when maintenance is required, effectively preventing slurry backflow or leakage. This maintains a clean working environment and avoids the risk of pipeline blockage caused by slurry backflow, further improving the reliability and operational safety of the device. Furthermore, the device has a compact overall structure, is easy to operate and maintain, and its functional units can be flexibly adapted to different slopes and construction conditions, demonstrating good engineering applicability and scalability. The entire method and equipment are highly efficient and adaptable, and are especially suitable for the reinforcement and ecological restoration of large-area slopes in highways, railways and mines. Attached Figure Description

[0035] Figure 1 This is a flowchart of the construction method for EICP-vegetation synergistic slope reinforcement in an embodiment of the present invention;

[0036] Figure 2 A schematic diagram of a construction device for reinforcing a slope surface;

[0037] Figure 3 A three-dimensional structural diagram of the mixing spraying mechanism;

[0038] Figure 4A three-dimensional structural diagram of the hybrid spraying mechanism from another perspective;

[0039] Figure 5 A cross-sectional view of the mixing spraying mechanism;

[0040] Figure 6 : Plant growth in the fourth week with different water washing volumes; W-0, W-1, W-2, W-3, W-4 represent water washing with 0, 1, 2, 3, and 4 times the volume of the consolidation solution, respectively.

[0041] Figure 7 This graph shows the variation of residual ion content in soil under different water washing conditions.

[0042] Explanation of key symbols:

[0043] Box body 1, screw thread 101, settling groove 102, mounting hole 103, connecting hole 104; top cover 2, water spray hole 201, tightening section 202, annular cavity 203, bottom cover 3, battery 3, electromagnet 302, inner liner 4, flange 401, docking hole 402; docking plate 5, through hole 501, connecting bolt 502, connecting pipe 6, stirring motor 7, stirring shaft 701, blocking plate 8, sliding rod 9, spring 10, top rod 11. Detailed Implementation

[0044] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0045] Example 1:

[0046] This embodiment proposes a construction method for EICP-vegetation synergistic slope reinforcement, which includes the following steps:

[0047] S1: Slope pretreatment, removal of debris and trimming of gentle slopes, excavation of intercepting ditches;

[0048] S2: Prepare urease solution and cementing solution; the urease solution has an activity of 1000-1500 U / L and a concentration of 0.5-0.8 g / L; the cementing solution is a mixture of calcium chloride and urea, both with a concentration of 1-1.5 mol / L;

[0049] S3: Use a dual-chamber injection spraying device to spray EICP slurry. The urease solution and cementing solution are mixed instantly through a mixing nozzle and sprayed in 2-3 times to form a cemented surface layer.

[0050] S4: After standing for 24-48 hours, use a high-pressure water truck to wash and desalinate the slurry, rinsing twice with a total water volume of 4 times the total volume of the EICP slurry. Detect Cl. - ≤0.15%, NH4+ ≤0.1%;

[0051] S5: Plant seeds are made into a suspension and sprayed evenly on the slope through an atomizing nozzle, then covered with non-woven fabric;

[0052] S6: Post-construction watering and maintenance, monitoring the condition of vegetation and cementing layer.

[0053] like Figure 2 As shown in the schematic diagram of the slope reinforcement profile, the slope structure formed by this method includes, from bottom to top, a water-washed optimization layer 2, an EICP cemented surface layer 3, and a vegetation layer 4. The synergistic effect of each layer realizes the mechanical reinforcement and ecological restoration of the slope.

[0054] This method organically combines EICP technology with vegetation slope protection technology through step-by-step construction. First, slope pretreatment is carried out to create favorable conditions for subsequent construction. Then, EICP slurry is prepared and the urease solution and cementing solution are mixed instantly through a dual-chamber injection spraying device to avoid pipeline blockage caused by premature reaction. After spraying, the mixture is allowed to stand to allow the EICP reaction to be complete, and then residual ions are removed by high-pressure water washing to create a suitable environment for plant growth. Finally, seed suspension is sprayed and maintenance is carried out to form an EICP-vegetation synergistic reinforcement system.

[0055] The above solution effectively solves the pipeline blockage problem caused by premature slurry reaction in the traditional EICP process, ensuring spray uniformity; the water washing and desalination process removes Cl... - and NH4 + The concentrations were controlled at ≤0.15% and ≤0.1% respectively, which significantly reduced the inhibitory effect on plant growth; seamless integration of EICP reinforcement and vegetation restoration was achieved, with EICP providing erosion resistance in the early stage and vegetation roots providing reinforcement in the later stage, forming a synergistic reinforcement effect; the construction procedure is reasonable and easy to operate, and it is suitable for various slope ecological reinforcement projects.

[0056] In this embodiment, in step S3: the single spray volume is 0.5-1.0 L / m², the nozzle moving speed is 0.5-1 m / s, the nozzle distance from the slope is 50-80 cm, and the overlap width of adjacent spraying strips is 10-15 cm; in step S4: the water washing pressure is 0.2-0.3 MPa, the total water volume is 2-4 L / m², and the washing is done in 2 times with an interval of 12 h.

[0057] like Figure 1 As shown, the dual-chamber spraying device ensures construction quality through precise control of spraying parameters. Figure 5 The comparison chart of residual ion content in soil with different water washing amounts shows that rinsing twice at intervals can significantly reduce the concentration of residual ions.

[0058] This embodiment ensures that EICP slurry evenly covers the slope by controlling spraying parameters (single spray volume, moving speed, distance, and overlap width), forming a continuous and uniformly thick cemented surface layer. The design of two flushes at 12-hour intervals allows sufficient time for water to penetrate. The first flush loosens surface ions, and the second flush further removes ions, improving desalination efficiency.

[0059] It is worth mentioning that the optimized spraying parameters ensured that the EICP adhesive layer was of uniform and continuous thickness with no missed areas; the interval rinsing improved the desalination efficiency and ensured that the ion concentration met the standards; the parameter range was verified by experiments, which not only ensured the construction quality but also had good operability.

[0060] In this embodiment, in step S5: the seeds are bermudagrass and tall fescue in a weight ratio of 7:3; the suspension concentration is 50-100 g / L, and the spraying dosage is 10-15 g / m²; the atomizing nozzle orifice diameter is 1-2 mm; water is sprayed 2-3 times a week for the first 2 weeks, and the soil moisture content is maintained at 20%-25%; the non-woven fabric is removed when the seed germination rate reaches 50%.

[0061] like Figure 4 The comparison chart of plant growth under different water washing amounts in the fourth week shows that the optimized seed ratio and maintenance program can significantly improve the quality of vegetation growth.

[0062] Specifically, a mixed seed of bermudagrass and tall fescue with strong adaptability and well-developed root systems is selected, along with an optimized suspension formula and spraying parameters to ensure even seed distribution and good germination. Maintaining suitable soil moisture content in the early stages promotes seed germination; once the germination rate reaches 50%, the non-woven fabric is removed, protecting the seedlings while avoiding shading.

[0063] The above approach ensures that the selection of mixed grass species is reasonable, taking into account growth rate, root depth, and adaptability; the suspension formulation and spraying parameters are optimized, improving seed adhesion and germination rates; and the maintenance plan is scientific, protecting seedlings while avoiding adverse effects on later growth.

[0064] Example 2:

[0065] This embodiment proposes a construction device for EICP-vegetation synergistic slope reinforcement using the above-mentioned method, comprising: a dual-chamber liquid storage unit, including a urease liquid chamber and a cementing liquid chamber; a dual-pump linkage system for controlling the flow rate and pressure of the liquid in the two chambers; a delivery pipeline connecting the dual-chamber liquid storage unit and a mixing spraying mechanism; and a mixing spraying mechanism comprising a box body 1 and a top cover 2, wherein an inner liner 4 is detachably connected inside the box body 1, and one end of the box body 1 is connected to a connecting pipe 6 communicating with the delivery pipeline, and the inner side of the inner liner 4 has a docking hole 402 communicating with the connecting pipe 6; the other end of the box body 1 is detachably connected to the top cover 2, and a stirring motor 7 is provided in the middle of the top cover 2, the output end of the stirring motor 7 is connected to a stirring shaft 701 extending into the inner liner 4, and a plurality of stirring rods are distributed on the stirring shaft 701.

[0066] like Figure 1 The schematic diagram of the dual-chamber dispensing spraying device shows that the device includes a dual-chamber liquid storage unit, a dual-pump linkage system, delivery pipelines, and a mixing and spraying mechanism. Figure 6 and Figure 7 As shown in the schematic diagram of the mixing and spraying mechanism, the box body 1, the upper cover 2, the inner liner 4 and other components work together to achieve instant mixing and spraying of the slurry.

[0067] This device employs a dual-chamber independent storage system for urease solution and cementing solution, precisely controlling the flow ratio of the two liquids through a dual-pump linkage system, achieving instantaneous mixing within the mixing and spraying mechanism. The design of the mixing and spraying mechanism ensures that the two liquids are thoroughly mixed by the stirring rod after entering the inner tank, guaranteeing a uniform reaction.

[0068] The above solution completely solves the pipeline blockage problem caused by pre-mixing of EICP slurry; the stirring mechanism ensures thorough mixing of the two liquids, improving reaction efficiency and uniformity; and the modular design facilitates maintenance and cleaning, improving the service life and reliability of the equipment.

[0069] In this embodiment, the outer periphery of the box body 1 near the upper cover 2 is provided with a screw hole 101, and the upper cover 2 is provided with a tightening section 202 that screws into the screw hole 101. The end face of the box body 1 near the upper cover 2 is also provided with a groove 102. The end of the inner liner 4 is provided with a flange 401 that can be embedded in the groove 102. Several mounting holes 10 are distributed circumferentially on the bottom surface of the groove 102. Each mounting hole 10 is provided with an elastic mechanism to fix the inner liner 4 outward after the upper cover is separated from the box body 1.

[0070] like Figure 7 As shown, the spiral engagement structure of the screw hole 101 and the tightening section 202, the fitting structure of the countersunk groove 102 and the flange 401, and the elastic mechanism inside the mounting hole 10 are clearly visible.

[0071] The screw-in connection allows for quick assembly and disassembly of the box and lid, while the groove and flange ensure accurate positioning of the inner liner. A flexible mechanism automatically pushes the inner liner out after the lid is removed, facilitating cleaning and replacement.

[0072] In summary, the ability to quickly disassemble and assemble improves maintenance efficiency; the automatic ejection function of the inner liner avoids damage that may be caused by manual prying; the structure is simple and reliable, and the manufacturing cost is low.

[0073] In this embodiment, the elastic mechanism includes a spring disposed in the mounting hole 10 and a push rod 11 connected to the spring, wherein the outer end of the push rod 11 abuts against the flange 401.

[0074] like Figure 7 As shown, the specific installation positions and working states of the spring and push rod 11 are clearly displayed. The spring provides continuous elastic force, which is transmitted to the inner liner's flange through the push rod. When the top cover is removed, the spring force smoothly pushes the inner liner out.

[0075] In this embodiment, a backstop mechanism is slidably installed at the end of the stirring shaft 7 along its axial direction, and an adjustment mechanism is installed on the side of the box 1 away from the upper cover 2. The adjustment mechanism can change the position of the backstop mechanism to block the docking hole 402. The backstop mechanism includes a sliding rod 9 that is slidably connected to the stirring shaft 7 along its axial direction and a blocking plate fixed to the end of the sliding rod 9.

[0076] like Figure 7 As shown, the connection between the sliding rod 9 and the blocking plate, as well as its alignment with the docking hole 402, are clearly visible. Specifically, a cross-shaped groove can be opened at the end face of the stirring shaft 7, and the sliding rod 9 is selected with a cross-shaped cross section, so that the sliding rod 9 can only slide along the groove along the axial direction of the stirring shaft 7. The area of ​​the blocking plate 8 is larger than the area of ​​the docking hole, thereby effectively sealing the docking hole.

[0077] The check valve mechanism controls the opening and closing of the docking hole by moving a blocking plate. When cleaning or replacing the inner tank is required, the blocking plate can be adjusted to seal the docking hole, preventing liquid leakage. On the other hand, it also prevents the mixed liquid from flowing back into the upstream delivery pipe and causing blockage.

[0078] Therefore, the above solution avoids slurry leakage during disassembly, keeps the working environment clean, improves the safety and convenience of the device, and has a clever structure that does not add any extra operating steps.

[0079] In this embodiment, the adjustment mechanism includes a bottom cover 3 detachably connected to the box body 1, a battery 3 disposed in the bottom cover 3, and an electromagnet 302 electrically connected to the battery 3. The box body 1 and the inner liner 4 are respectively provided with a first hole and a second hole that communicate with each other. Part of the electromagnet 302 is installed in the first hole and the second hole. The blocking plate has magnetism and can be attracted to the electromagnet 302.

[0080] In this design, both the outer sides of the box body 1 and the bottom cover 3 are provided with annular connecting plates 5. Several through holes 501 are opened on the connecting plates 5. By fixing connecting bolts 502 at the corresponding through holes 501, the box body 1 and the bottom cover 3 are fixedly connected.

[0081] like Figure 6 and Figure 7 As shown, the installation positions of the bottom cover 3, the battery 301, and the electromagnet 302, as well as the electromagnetic control principle, are clearly displayed.

[0082] In this design, the position of the blocking plate is controlled by the switching on and off of an electromagnet. When energized, the electromagnet attracts the blocking plate, closing the docking hole; when de-energized, the blocking plate is not subject to any external force, and therefore can open the docking hole under the impact of water flow. This design achieves automatic opening and closing of the docking hole, offering convenient operation, fast response, and precise control; the electromagnetic control eliminates the need for mechanical connections, simplifying the structural design.

[0083] In this embodiment, the dual-pump linkage system is controlled by a PLC, the flow ratio between the two chambers is 1:1, and the working pressure is 0.3-0.5MPa; the inner diameter of the delivery pipeline is 20-30mm, the pipe wall is equipped with an electromagnetic flow sensor, the pipe joint adopts double compression fitting seal, and the leakage is ≤0.1mL / min.

[0084] like Figure 1 As shown, the installation locations of the dual-pump linkage system 7 and 8 and the flow sensor 9, as well as the connection methods of the delivery pipelines 12 and 13, are clearly displayed.

[0085] The PLC control system precisely controls the flow and pressure of the two pumps to ensure that the two liquids are mixed in a 1:1 ratio. An electromagnetic flow sensor monitors the flow in real time, and a double-ferrule seal ensures the pipeline is airtight.

[0086] The above solution achieves precise control of the two-liquid ratio, ensuring the EICP reaction effect; it also enables real-time monitoring and feedback control, improving system stability and reliability; and its excellent sealing performance prevents slurry leakage and waste.

[0087] In this embodiment, the dual-pump linkage system integrates a pressure protection module, which automatically shuts down when the pressure in a single chamber is greater than 0.55 MPa; the chamber wall of the dual-chamber liquid storage unit is equipped with a liquid level sensor for real-time monitoring of the remaining slurry volume.

[0088] like Figure 1 As shown, the installation locations of the pressure protection module and the liquid level sensor, as well as their connection to the entire system, are clearly displayed.

[0089] The pressure protection module monitors the system pressure and automatically shuts down the machine when the pressure rises abnormally to prevent equipment damage. The level sensor monitors the remaining slurry level in real time, providing information for timely slurry replenishment.

[0090] The above solutions improve equipment safety and prevent overload damage; liquid level monitoring avoids spraying interruptions due to insufficient slurry.

[0091] Example 3:

[0092] like Figure 2 As shown, the slope reinforcement structure formed by the method of the present invention includes: a water-washed optimization layer 2 (depth 10-20cm, Cl) - ≤0.15%, NH4 + The structure consists of three layers: a ≤0.1% shear strength, an EICP-bonded surface layer 3 (10cm thick, divided into dense and porous zones), and a vegetation layer 4 (a mixture of bermudagrass and tall fescue, with a coverage rate ≥70%). Within 6 months, this structure increases the shear strength of the slope surface to ≥28kPa, and the vegetation survival rate reaches over 90%.

[0093] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0094] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A construction method for EICP-vegetation synergistic slope reinforcement, characterized in that, Includes the following steps: S1: Slope pretreatment, removal of debris and trimming of gentle slopes, excavation of intercepting ditches; S2: Prepare urease solution and cementing solution; the urease solution has an activity of 1000-1500 U / L and a concentration of 0.5-0.8 g / L; the cementing solution is a mixture of calcium chloride and urea, both with a concentration of 1-1.5 mol / L; S3: Use a dual-chamber injection spraying device to spray EICP slurry. The urease solution and cementing solution are mixed instantly through a mixing nozzle and sprayed in 2-3 times to form a cemented surface layer. S4: After standing for 24-48 hours, use a high-pressure water truck to wash and desalinate the slurry, rinsing twice with a total water volume of 4 times the total volume of the EICP slurry. Detect Cl. - ≤0.15%, NH4 + ≤0.1%; S5: Plant seeds are made into a suspension and sprayed evenly on the slope through an atomizing nozzle, then covered with non-woven fabric; S6: Post-construction watering and maintenance, monitoring the condition of vegetation and cementing layer.

2. The method according to claim 1, characterized in that, In step S3: The single spraying rate is 0.5-1.0 L / m², the nozzle moving speed is 0.5-1 m / s, the nozzle distance from the slope is 50-80 cm, and the overlap width of adjacent spraying strips is 10-15 cm. In step S4: the water washing pressure is 0.2-0.3MPa, the total water volume is 2-4L / m², and the washing is done in 2 sessions with an interval of 12 hours.

3. The method according to claim 1, characterized in that, In step S5: the seeds are bermudagrass and tall fescue in a weight ratio of 7:3; the suspension concentration is 50-100 g / L, and the spraying dosage is 10-15 g / m²; the atomizing nozzle diameter is 1-2 mm; water is sprayed 2-3 times a week for the first 2 weeks, and the soil moisture content is maintained at 20%-25%; the non-woven fabric is removed when the seed germination rate reaches 50%.

4. A construction device for implementing the EICP-vegetation synergistic slope reinforcement method according to any one of claims 1-3, characterized in that, include: The dual-chamber storage unit includes a urease chamber and a cementation chamber; A dual-pump linkage system is used to control the flow rate and pressure of liquid in both chambers; The delivery pipeline connects the dual-chamber liquid storage unit to the mixing and spraying mechanism; A mixing spraying mechanism includes a box body and a top cover. An inner liner is detachably connected to the box body, and one end of the box body is connected to a connecting pipe that communicates with a delivery pipeline. A docking hole communicating with the connecting pipe is opened on the inner side of the inner liner. The other end of the box is detachably connected to the top cover. A stirring motor is installed in the middle of the top cover. The output end of the stirring motor is connected to a stirring shaft that extends into the inner liner. Several stirring rods are distributed on the stirring shaft.

5. A construction device for reinforcing slopes as described in claim 4, characterized in that, The outer periphery of the box body near the top cover is provided with a screw hole, and the top cover is provided with a tightening section that screws into the screw hole. The end face of the box body near the top cover is also provided with a groove, and the end of the inner liner is provided with a flange that can be inserted into the groove. Several mounting holes are distributed circumferentially on the bottom surface of the groove, and each mounting hole is provided with an elastic mechanism to push the inner liner outward after the top cover is separated from the box body.

6. A construction device for reinforcing slopes as described in claim 4, characterized in that, The elastic mechanism includes a spring disposed in the mounting hole and a push rod connected to the spring, with the outer end of the push rod abutting against the flange.

7. A construction device for reinforcing slopes as described in claim 4, characterized in that, A backstop mechanism is slidably mounted at the end of the stirring shaft along its axial direction. An adjustment mechanism is mounted on the side of the box away from the top cover. The adjustment mechanism can change the position of the backstop mechanism to block the docking hole. The backstop mechanism includes a sliding rod that is slidably connected to the stirring shaft along its axial direction and a blocking plate fixed to the end of the sliding rod.

8. A construction device for reinforcing slopes as described in claim 4, characterized in that, The adjustment mechanism includes a bottom cover detachably connected to the box body, a battery disposed in the bottom cover, and an electromagnet electrically connected to the battery. The box body and the inner liner are respectively provided with interconnected holes one and two. Part of the electromagnet is installed in holes one and two. The blocking plate is magnetic and can be attracted to the electromagnet.

9. The apparatus according to claim 6, characterized in that, The dual-pump linkage system is controlled by a PLC, with a flow ratio of 1:1 between the two chambers and a working pressure of 0.3-0.5MPa. The inner diameter of the delivery pipeline is 20-30mm, and the pipe wall is equipped with an electromagnetic flow sensor. The pipe joints are sealed with double compression fittings, and the leakage rate is ≤0.1mL / min.

10. The apparatus according to claim 6, characterized in that, The dual-pump linkage system integrates a pressure protection module, which automatically shuts down when the pressure in a single chamber exceeds 0.55 MPa; the chamber wall of the dual-chamber storage unit is equipped with a liquid level sensor for real-time monitoring of the remaining slurry volume.

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