A dry method vibroflotation device and method with microbial grouting function

Abstract

This invention discloses a dry vibratory compaction device and method with microbial grouting function, relating to the field of civil engineering foundation treatment technology. It includes a hoist, a boom, a vibration damper, and a vibratory body connected sequentially from top to bottom. The bottom end of the vibratory body has an air outlet. A grouting nozzle is provided on the outer wall of the vibratory body. The hoist, boom, vibration damper, and vibratory body have internal air supply channels, grouting channels, and cooling channels connected to an external supply system. The air supply channel is connected to the air outlet, the grouting channel is connected to the grouting nozzle, and the cooling channel is an internal circulation channel attached to the grouting channel. First, the ground is vibrated by the vibration of the vibratory body and the high-pressure air ejected from the air outlet. Then, when the vibratory body is completely below ground level, grout is injected through the grouting nozzle. During this process, the temperature of the grouting medium is controlled to undergo a chemical reaction after ejection. This invention integrates vibratory compaction and grouting functions, achieving coordinated operation of vibratory compaction and grouting.

Description

Technical Field

[0001] This invention relates to the field of foundation treatment technology in civil engineering, and more specifically to a dry vibratory compaction device and method with microbial grouting function. Background Technology

[0002] Coral reef soil is mainly distributed in tropical seas and is widely used as a fill material for land reclamation and island building. It is a special soil-rock medium formed from near-source sediments, with complex particle characteristics, wide gradation, rich internal porosity, and easily broken particles. Therefore, foundation treatment is necessary for infrastructure construction on coral reef soil sites.

[0003] The main reinforcement mechanisms of foundation treatment include compaction, drainage, solidification, and replacement. Vibro-compaction is a commonly used method for reinforcing filled soil foundations. It relies primarily on vibratory compactors to provide vibration force to compact the soil, and on backfill material to further compact the soil. Microbial grouting reinforcement technology is a relatively new foundation reinforcement method. It involves injecting microbial inoculum and nutrients into the soil. The injected grout diffuses between the pores of soil particles, utilizing the mineralization effect between microorganisms and soil particles to rapidly gel into calcium carbonate crystals, thereby enhancing the mechanical properties of the soil and improving its strength and stiffness.

[0004] Coral soil, with its high gravel content, is suitable for foundation reinforcement using vibro-compaction. The vibro-compaction process creates gravel piles, effectively improving its overall strength and liquefaction resistance. However, engineering practice shows that poor process control during dredged filling often results in uneven particle size and poor gradation of the fill material, posing a risk of uneven settlement even after vibro-compaction reinforcement, making it difficult to guarantee the quality of the dredged foundation. On the other hand, microbial grouting reinforcement technology has advantages such as being environmentally friendly, having a fast repair speed, and minimal impact on the natural soil environment. However, this method requires multiple injections of bacterial solution and grout in stages, with intervals of several hours, making the procedure complex and time-consuming. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a foundation treatment device and method that combines microbial grouting and dry vibratory compaction, thereby achieving an organic combination of the two foundation treatment processes and improving the foundation treatment effect.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A dry vibratory compaction device with microbial grouting function includes a lifting head, a lifting rod, a vibration damper and an exciter connected in sequence from top to bottom;

[0008] The bottom end of the exciter has an air outlet;

[0009] The outer wall of the vibrating body is provided with a grouting nozzle;

[0010] The lifting head, the lifting rod, the vibration damper, and the exciter are provided with an air supply channel, a grouting channel, and a cooling channel that are connected to an external supply system. The air supply channel is connected to the air outlet, the grouting channel is connected to the grouting nozzle, and the cooling channel is an internal circulation channel located inside the air supply channel and attached to the outside of the excitation part surrounding the center of the exciter.

[0011] Through the above technical solution, this invention integrates vibratory compaction and grouting functions into one unit, realizing coordinated operation of vibratory compaction and grouting, improving construction efficiency, and reducing equipment switching and construction procedures. Vibratory compaction increases soil porosity, which is then filled by grouting, better filling the complex pore structure in the soil and improving the bearing capacity and stability of the foundation. The cooling channel effectively reduces the heat generated by the hydraulic system during operation, protecting the equipment from high-temperature damage and extending its service life. The cooling channel forms a heat insulation barrier, preventing heat generated by the hydraulic system from being transferred to the grouting channel, avoiding premature chemical reactions of the grouting medium due to temperature increases, and ensuring the grouting effect.

[0012] Preferably, in the aforementioned dry vibro-compaction device with microbial grouting function, the number of grouting nozzles is multiple, and they are evenly arranged around the outer wall of the vibrating body. The even arrangement of multiple grouting nozzles around the vibrating body ensures uniform distribution of the grouting medium in the soil, improving the uniformity and integrity of the foundation reinforcement. The evenly distributed grouting nozzles can better fill the pores in the soil, reduce grouting dead zones, and enhance the bearing capacity and liquefaction resistance of the foundation. For complex foundations such as coral soil foundations and soft foundations, uniform grouting can better adapt to their complex pore structure and improve the reinforcement effect.

[0013] Preferably, in the aforementioned dry vibratory compaction device with microbial grouting function, the supply system includes a slurry chamber and a cooling water chamber. The slurry chamber is connected to the end of the grouting channel away from the grouting nozzle via a grouting pipeline. The cooling water chamber is connected to the cooling channel via an inlet pipe and a return pipe, forming a circulation loop. Integrating the slurry supply and cooling water supply into one unit simplifies the equipment structure and improves the compactness and ease of operation. The slurry chamber, connected to the grouting channel via the grouting pipeline, can stably deliver slurry to the grouting channel, ensuring the continuity and stability of the grouting process. The cooling water chamber, forming a circulation loop with the cooling channel via the inlet and return pipes, can efficiently remove the heat generated by the hydraulic system, ensuring the stability and reliability of the equipment during long-term operation. The recycling of cooling water reduces cooling water consumption, lowers equipment operating costs, and conforms to the green and low-carbon concept.

[0014] Preferably, in the aforementioned dry vibratory compaction device with microbial grouting function, the grouting pipeline is equipped with a grouting pump, a first pressure gauge, and a control valve; the water inlet pipe is equipped with a water pump, a second pressure gauge, and a check valve. The grouting pump and control valve on the grouting pipeline can precisely control the grouting pressure, flexibly adjusting the grouting pressure according to different soil types and foundation conditions to improve the grouting effect. The first pressure gauge can monitor the grouting pressure in real time, allowing operators to adjust grouting parameters promptly based on the pressure gauge reading, ensuring the smooth progress of the grouting process. The water pump and check valve on the water inlet pipe can precisely control the cooling water flow rate, ensuring a stable supply of cooling water, while the check valve prevents cooling water backflow, improving the reliability of the cooling system. By precisely controlling the grouting pressure and cooling water flow rate, equipment damage caused by excessive pressure or insufficient cooling water can be avoided, improving the safety and reliability of the equipment.

[0015] Preferably, in the aforementioned dry vibratory compaction device with microbial grouting function, the slurry chamber and the cooling water chamber are equipped with liquid cooling mechanisms. These mechanisms maintain the slurry in the slurry chamber at a low temperature, preventing premature chemical reactions during storage and ensuring slurry stability and grouting effect. The low-temperature environment extends the shelf life of the microbial slurry, reduces waste, and lowers construction costs. The liquid cooling mechanism in the cooling water chamber ensures a low-temperature supply of cooling water, improves cooling efficiency, and better protects the hydraulic system from high-temperature damage. In high-temperature construction environments, the liquid cooling mechanism ensures stable temperatures for both the slurry and cooling water, guaranteeing normal equipment operation and unaffected microbial grouting effects.

[0016] Preferably, in the aforementioned dry vibratory compaction device with microbial grouting function, the supply system further includes an air pump installed on the top of the hoisting head. The air pump is connected to the end of the air supply channel away from the air outlet. The air pump can stably deliver high-pressure air to the air supply channel, ensuring the ejection of high-pressure air from the air outlet and providing a stable air source for the vibratory compaction process. The ejection of high-pressure air enhances the vibratory compaction effect, making it easier for the vibratory compactor to penetrate the soil and improving vibratory compaction efficiency. The air pump allows for flexible adjustment of the air supply pressure, optimizing vibratory compaction parameters according to different soil types and construction requirements, thereby improving the adaptability of the equipment and the construction effect. The air pump is installed on the top of the hoisting head, resulting in a compact structure that reduces the equipment's footprint and improves its integration and ease of operation.

[0017] Preferably, in the aforementioned dry vibratory compaction device with microbial grouting function, a pressure sensor is provided at the air outlet. The pressure sensor can monitor the air pressure at the outlet in real time, allowing operators to adjust the air pump's supply pressure promptly based on the sensor's feedback signal, ensuring the stability and effectiveness of the vibratory compaction process. The pressure sensor can be connected to the air pump's control system to automatically control the supply pressure, automatically adjusting or triggering an alarm when the pressure is too high or too low, improving the equipment's safety and reliability. By monitoring the air pressure in real time, operators can optimize vibratory compaction parameters based on actual construction conditions, improving construction efficiency and quality. The pressure sensor reduces frequent manual adjustments to the air pressure, lowers the operator's workload, and increases the automation level of the construction process.

[0018] Preferably, in the aforementioned dry vibratory compaction device with microbial grouting function, the wall of the grouting channel has a jacket, and the jacket is a nano-aerogel insulation layer. Nano-aerogel is a highly efficient insulation material with extremely low thermal conductivity, which can significantly reduce heat transfer within the grouting channel and ensure the stability of the grout temperature. The insulation layer effectively prevents heat generated by the hydraulic system from being transferred to the grouting channel, avoiding premature chemical reactions in the grout due to temperature increases, thus ensuring the grouting effect. A stable temperature environment can extend the service life of the grout within the grouting channel, reduce grout waste, and lower construction costs. The insulation layer ensures temperature stability of the grout during the grouting process, allowing the grout to be sprayed and chemically react within the optimal temperature range, thus improving construction quality.

[0019] Preferably, in the aforementioned dry vibratory compaction device with microbial grouting function, the vibrating body is powered by a hydraulically driven hydraulic motor. The hydraulic motor drives an eccentric shaft to rotate via a coupling, thereby generating a horizontal excitation force and amplitude distributed along the main shaft axis. The hydraulically driven hydraulic motor provides powerful force, driving the eccentric shaft to rotate via the coupling, generating efficient horizontal excitation force and amplitude, thus improving the vibratory compaction effect. The hydraulic motor's speed is easily adjustable with a wide range, allowing for flexible adjustment of the vibration frequency according to different soil types and construction requirements, enhancing the equipment's adaptability and construction effectiveness. Compared to traditional motor systems, the hydraulic system offers higher stability and reliability, enabling stable operation in complex construction environments and reducing equipment failures. The hydraulic system can precisely control power output according to actual construction needs, avoiding unnecessary energy waste, reducing equipment energy consumption, and conforming to the green and low-carbon concept.

[0020] The present invention also provides a method for a dry vibratory compaction device with microbial grouting function, wherein the ground is first vibrated by the vibration of the exciter and the high-pressure air ejected from the air outlet; then, when the exciter is completely below ground level, grout is injected through the grouting nozzle. During this process, the grouting medium undergoes a chemical reaction after being ejected by reducing the temperature.

[0021] Through the above technical solution, the construction method of vibratory compaction followed by grouting of the present invention realizes the coordinated operation of vibratory compaction and grouting. The vibratory compaction process increases the porosity of the soil, and the grouting process fills the pores. The two work together to improve the foundation reinforcement effect.

[0022] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a dry vibratory compaction device and method with microbial grouting function, which has the following beneficial effects:

[0023] 1. It solves the problem of poor performance of traditional vibratory compaction devices in the reinforcement of special foundations. By combining microbial grouting with vibratory compaction, it effectively fills pores, binds soil particles, and improves the bearing capacity and liquefaction resistance of the foundation.

[0024] 2. This invention promotes the flow of grout in the soil pores by combining vibration and grouting, improving the uniformity of reinforcement and preventing bacterial residue from remaining on the grouting pipe wall, while reducing the risk of blockage. Moreover, the grouting and vibration work together to spread the reinforcement in all directions, resulting in a larger reinforcement area and higher overall integrity.

[0025] 3. A circulating water cooling system is designed to remove the heat released by the hydraulic system, preventing overheating and protecting the equipment. It also forms a thermal barrier, effectively isolating the hydraulic vibration system and the grouting system, ensuring that the grout temperature does not rise rapidly and cause premature reactions that could affect microbial grouting.

[0026] 4. The dry vibratory compaction and microbial grouting are effectively combined to avoid the dilution and loss of bacterial solution caused by the traditional water flushing method, and the damage to the formed calcium carbonate crystal skeleton caused by water spraying, which affects the reinforcement.

[0027] 5. The temperature-controlled microbial grouting method is adopted, which mixes the bacterial solution and the cementing solution without causing a reaction, effectively avoiding the traditional multiple-distribution grouting, simplifying the construction process and shortening the construction time.

[0028] 6. It has a wider range of applications and stronger adaptability. The hydraulic vibration system is more convenient to adjust the frequency than the traditional motor vibratory impactor, and the adjustment range is wider. The grouting system can adjust the grouting pressure through the pressure gauge and grouting pump. Different vibration frequencies and grouting pressures can be adjusted according to different soil types and foundation conditions, and adjustments can be made in real time according to the reinforcement situation.

[0029] 7. Environmentally friendly and sustainable: Compared with the traditional water flushing method, dry vibro-compaction has no mud pollution. The microbial reinforcement technology has less pollution and is environmentally friendly. It conforms to the green and low-carbon concept, promotes the sustainable development of civil engineering, and has good ecological and social benefits. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0031] Figure 1 The attached figure is a schematic diagram of the dry vibratory compaction device with microbial grouting function provided by the present invention;

[0032] Figure 2 The attached figure is a schematic diagram of the internal structure of the exciter provided by the present invention;

[0033] Figure 3 The attached figure is a top view of the exciter provided by the present invention.

[0034] in:

[0035] 1-Lifting head; 2-Lifting rod; 3-Vibration damper; 4-Vibration exciter; 5-Air outlet; 6-Grouting nozzle; 7-Air supply channel; 8-Grouting channel; 9-Cooling channel; 10-Grouting chamber; 11-Cooling water chamber; 12-Grouting pipeline; 13-Water inlet pipe; 14-Water return pipe; 15-Grouting pump; 16-First pressure gauge; 17-Control valve; 18-Water pump; 19-Second pressure gauge; 20-Check valve; 21-Air pump; 22-Air pressure sensor. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] See appendix Figure 1 To be continued Figure 3 This invention discloses a dry vibratory compaction device with microbial grouting function, comprising a lifting head 1, a lifting rod 2, a vibration damper 3 and an exciter 4 connected in sequence from top to bottom;

[0038] The bottom end of the vibrator 4 has an air outlet 5;

[0039] The outer wall of the vibrating body 4 is provided with a grouting nozzle 6;

[0040] The internal parts of the lifting head 1, lifting rod 2, vibration damper 3 and exciter 4 are provided with an air supply channel 7, a grouting channel 8 and a cooling channel 9 that are connected to the external supply system; the air supply channel 7 is connected to the air outlet 5, the grouting channel 8 is connected to the grouting nozzle 6, and the cooling channel 9 is an internal circulation channel, located inside the air supply channel 7 and attached to the outside of the excitation part surrounding the center of the excitation body 4.

[0041] To further optimize the above technical solution, the number of grouting nozzles 6 is multiple, and they are evenly arranged around the outer wall of the vibrating body 4.

[0042] To further optimize the above technical solution, the supply system includes a slurry chamber 10 and a cooling water chamber 11. The slurry chamber 10 is connected to the end of the grouting channel 8 away from the grouting nozzle 6 through the grouting pipe 12. The cooling water chamber 11 is connected to the cooling channel 9 through the inlet pipe 13 and the return pipe 14, forming a circulation loop.

[0043] To further optimize the above technical solution, the grouting pipeline 12 is equipped with a grouting pump 15, a first pressure gauge 16 and a control valve 17; the water inlet pipe 13 is equipped with a water pump 18, a second pressure gauge 19 and a one-way valve 20.

[0044] To further optimize the above technical solution, the slurry chamber 10 and the cooling water chamber 11 are equipped with a liquid cooling mechanism.

[0045] To further optimize the above technical solution, the supply system also includes an air pump 21 installed on the top of the hoist 1, and the air pump 21 is connected to the end of the air supply channel 7 away from the air outlet 5.

[0046] To further optimize the above technical solution, a pressure sensor 22 is installed at the air outlet 5.

[0047] To further optimize the above technical solution, the wall of the grouting channel 8 has a sandwich layer, and the sandwich layer is a nano-aerogel heat insulation layer.

[0048] To further optimize the above technical solution, the vibratory body 4 uses a hydraulically driven hydraulic motor as its power source. The hydraulic motor drives the eccentric shaft to rotate via a coupling, thereby generating a horizontal excitation force and amplitude distributed along the main shaft axis. This enables the vibratory compactor to efficiently compact the surrounding soil. Compared to a traditional transmission vibratory compactor, the hydraulic vibratory compactor has a more easily adjustable frequency and a wider adjustment range.

[0049] The method of the dry vibratory compaction device with microbial grouting function provided in this embodiment is as follows: First, the ground is vibrated by the vibration of the exciter 4 and the high-pressure air ejected from the air outlet 5; then, when the exciter 4 is completely below the ground, grout is injected through the grouting nozzle 6. During this process, the grouting medium undergoes a chemical reaction after being ejected by reducing the temperature.

[0050] The bacterial solution mentioned in this embodiment is *Sporosarci-napasteurii* (DSM33) (also known as *Bacillus pasteurellii*). The cementing solution mentioned is a mixture of urea and calcium chloride.

[0051] The slurry chamber 10 contains a mixed solution of bacterial solution and cementing solution. When the temperature is below 10℃, the bacterial activity is essentially zero, and the bacterial solution and cementing solution do not react. The bacterial solution and cementing solution are mixed in advance and placed in the slurry chamber 10 for refrigeration. Temperature control is used to prevent distributed injection, which would make the reinforcement process cumbersome and time-consuming.

[0052] The inner walls of all eight grouting channels are lined with a nano-aerogel insulation layer. Aerogel is a highly efficient insulation material with an extremely low thermal conductivity (0.012-0.020 W / (m·K)), far superior to traditional insulation materials (such as glass wool and rock wool). For the grouting pipes, the insulation performance of aerogel can significantly reduce heat loss, ensuring that the grout temperature remains stable within the range of 5-8℃, and preventing premature reaction of microbial grout or temperature fluctuations from affecting the reinforcement effect.

[0053] Hydraulic vibratory compactors generate heat during operation. Cooling water is used to cool the hydraulic system and also to isolate the vibration system from the grouting system to prevent the grout temperature from rising.

[0054] This embodiment uses dry vibratory compaction to prevent the water-flushing of traditional vibratory compactors from affecting grouting.

[0055] How to use:

[0056] Open the one-way valve 20, and the water pump 18 will press the cooling water in the cooling water chamber 11 into the equipment through the inlet pipe 13. The cooling water will then flow back to the cooling water chamber 11 through the cooling channel 9 and continuously circulate through the return pipe 14.

[0057] The equipment is lifted by a crane, and a hydraulic motor is driven by hydraulic power. The hydraulic motor drives an eccentric shaft to rotate at high speed through a coupling, generating high-frequency vibration. Simultaneously, high-pressure air is pumped in through air pump 21. The high-pressure air passes through air supply channel 7 and is finally ejected from air outlet 5, working in conjunction with a vibratory compactor to compact the ground. Under the combined action of vibration and compaction, the vibratory compactor is driven into the soil. The air pressure of air pump 21 can be adjusted in real time based on the air pressure feedback from air pressure sensor 22.

[0058] When the exciter 4 is below ground level, open control valve 17 and start grouting pump 15. As grouting pump 15 injects the bacterial solution, the exciter 4 simultaneously vibrates, carrying the grouting pipe and the bacterial solution. The vibration frequency can be adjusted to ensure the bacterial solution is evenly distributed in the soil pores and to prevent it from remaining on the grouting pipe wall. After the cementing solution and microbial solution leave the device, the temperature gradually increases. Once the reaction temperature is reached, a full reaction occurs, generating calcium carbonate crystals that assist the exciter in compacting the soil, thus achieving the effect of reinforcing soft soil foundations.

[0059] The main points of this embodiment are:

[0060] 1. Integrated Design: Deeply integrates the microbial grouting system and the vibratory compaction device, enabling them to operate synchronously and efficiently. The microbial grouting system includes a bacterial solution tank, grouting pump, pressure gauge, and corrosion-resistant delivery pipelines, working closely with the vibratory compaction device. Simultaneously, the overall equipment layout is carefully planned to ensure that the vibration of the vibratory compaction device does not interfere with the microbial grouting system, achieving the design goals of compact structure, convenient operation, and easy maintenance.

[0061] 2. Temperature-controlled premixed grouting system: An integrated liquid cooling device maintains a low-temperature environment of 5-8℃, enabling premixing and storage of the bacterial solution (Bacillus pasteurellii bacterial solution) and the cementing solution (a mixture of urea and calcium chloride). Utilizing gradient temperature control technology, the grout temperature is kept ≤10℃ during underground operations. A built-in nano-aerogel insulation layer in the grouting pipe ensures the grout temperature does not rise rapidly. After injection, the grout naturally warms to 25-30℃ with the help of ground temperature, triggering the reaction. This effectively avoids the cumbersome process of traditional step-by-step grouting, simplifying construction steps and shortening construction time.

[0062] 3. Vibration-Grouting-Cooling Synergistic Structure: Cooling water channels surround the hydraulic vibrator, forming a thermal barrier to reduce the impact of heat release from the hydraulic device on the grouting system, ensuring grout stability and preventing premature reaction of bacterial and cementing solutions. Intelligent linkage between vibration frequency and grouting pressure is achieved, facilitating adjustment of the hydraulic vibratory compactor frequency and allowing for flexible adjustment of construction parameters based on different soil types and foundation conditions, thus enhancing equipment adaptability.

[0063] 4. Optimize the effect of microbial grouting: By combining vibration and grouting, the flow of grout in the soil pores is promoted, improving the uniformity of reinforcement. Vibration also prevents bacterial solution from remaining on the grouting pipe wall, reducing the risk of blockage. The synergistic effect of grouting and vibration allows for a larger reinforcement area and improves the overall integrity of the foundation.

[0064] 5. Adopting dry vibratory compaction process: Abandoning the traditional water flushing method of vibratory compaction, effectively avoiding the dilution and loss of bacterial solution caused by water flushing, as well as the damage to the formed calcium carbonate crystal skeleton caused by water spraying, ensuring that the effect of microbial grouting is not affected, and better leveraging the reinforcement advantages of combining microbial grouting with vibratory compaction.

[0065] This embodiment is primarily applied to various complex foundation reinforcement scenarios in the field of civil engineering, especially for foundations with special reinforcement needs, such as coral soil foundations, soft foundations, foundations with cavities and cracks, and foundations with uneven settlement problems. It can be widely used for foundation reinforcement projects related to high-rise buildings, transportation hubs (such as airport runways and railway subgrades), large bridge foundations, dam foundations for water conservancy and hydropower projects, and various foundation reinforcement projects related to marine development. Through precise intelligent control and efficient grouting and vibratory compaction operations, it significantly improves the bearing capacity of the foundation, enhances stability, effectively resists the risk of seismic liquefaction, and ensures the safety and stability of various engineering structures throughout their entire life cycle, laying a solid foundation for civil engineering construction and powerfully promoting high-quality development and sustainability in engineering construction.

[0066] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0067] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dry vibratory compaction device with microbial grouting function, comprising a lifting head (1), a lifting rod (2), a vibration damper (3), and a vibrating body (4) connected sequentially from top to bottom; characterized in that: The bottom end of the exciter (4) has an air outlet (5). The outer wall of the vibrator (4) is provided with a grouting nozzle (6). The internal parts of the lifting head (1), the lifting rod (2), the vibration damper (3) and the exciter (4) are provided with an air supply channel (7), a grouting channel (8) and a cooling channel (9) that are connected to the external supply system; the air supply channel (7) is connected to the air outlet (5), the grouting channel (8) is connected to the grouting nozzle (6), and the cooling channel (9) is an internal circulation channel, located inside the air supply channel (7) and attached to the outside of the excitation part surrounding the center of the exciter (4); The supply system includes a slurry chamber (10) and a cooling water chamber (11). The slurry chamber (10) is connected to the end of the grouting channel (8) away from the grouting nozzle (6) via a grouting pipe (12). The cooling water chamber (11) is connected to the cooling channel (9) via an inlet pipe (13) and a return pipe (14) to form a circulation loop. The slurry chamber (10) and the cooling water chamber (11) are equipped with liquid refrigeration mechanisms; The wall of the grouting channel (8) has a sandwich layer, and the sandwich layer is a nano-aerogel heat insulation layer.

2. The dry vibratory compaction device with microbial grouting function according to claim 1, characterized in that, The number of grouting nozzles (6) is multiple, and they are evenly arranged around the outer wall of the vibrating body (4).

3. The dry vibratory compaction device with microbial grouting function according to claim 1, characterized in that, The grouting pipeline (12) is equipped with a grouting pump (15), a first pressure gauge (16) and a control valve (17); the water inlet pipe (13) is equipped with a water pump (18), a second pressure gauge (19) and a check valve (20).

4. A dry vibratory compaction device with microbial grouting function according to claim 1 or 3, characterized in that, The supply system also includes an air pump (21) installed on the top of the hoist (1), the air pump (21) being connected to the end of the air supply channel (7) away from the air outlet (5).

5. A dry vibratory compaction device with microbial grouting function according to claim 4, characterized in that, A pressure sensor (22) is provided at the air outlet (5).

6. A dry vibratory compaction device with microbial grouting function according to claim 1, characterized in that, The exciter (4) uses a hydraulic motor as its power source. The hydraulic motor drives the eccentric shaft to rotate through a coupling, thereby generating a horizontal excitation force and amplitude distributed along the main shaft axis.

7. A method for a dry vibratory compaction device with microbial grouting function as described in any one of claims 1-6, characterized in that, First, the ground is vibrated by the vibration of the exciter (4) and the high-pressure air ejected from the air outlet (5); then, when the exciter (4) is completely below the ground, grout is injected through the grouting nozzle (6). During this process, the grouting medium undergoes a chemical reaction after being ejected by lowering the temperature.

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