Foundation treatment device combining microbial grouting and dry vibroflotation

Abstract

The utility model discloses a foundation treatment device combining microbial grouting and dry vibroflotation, which relates to the technical field of civil engineering foundation treatment and comprises a hanging head, a hanging rod, a shock absorber and a shock excitation body which are sequentially connected. An air outlet is formed in the bottom end of the excitation body; a grouting nozzle is arranged on the outer side wall of the vibration excitation body; an air supply channel, a grouting channel and a cooling channel which are communicated with an external supply system are arranged in the hanging head, the hanging rod, the shock absorber and the shock excitation body; the air supply channel is communicated with the air outlet, the grouting channel is communicated with the grouting nozzle, and the cooling channel is an internal circulation channel and is attached to the grouting channel. Firstly, the ground is vibrated and impacted through vibration of the vibration excitation body and ejection of high-pressure air from the air outlet; and then when the vibration excitation body completely enters the ground, grouting is conducted through the grouting nozzle, and in the process, the grouting medium is controlled to be subjected to chemical reaction after being sprayed out by reducing the temperature. According to the utility model, the vibroflotation function and the grouting function are integrated, so that the collaborative operation of vibroflotation and grouting is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the civil engineering ground treatment technical field more specifically relates to a kind of ground treatment device in combination with microbial grouting and dry method vibroflotation. BACKGROUND

[0002] Coral soil is mainly distributed in tropical sea area, and it is widely used for land reclamation and island building as fill material. Coral soil is a special geotechnical medium formed by near-source deposition, and its particle characteristics are complex, with wide gradation, rich internal porosity and easily broken particles. Therefore, foundation treatment must be carried out for infrastructure construction in coral soil sites.

[0003] The reinforcement mechanism of ground treatment mainly includes compaction, drainage, solidification and replacement. Vibroflotation is a commonly used ground treatment method for reinforcing fill ground, which mainly relies on the vibration force provided by the vibroflotation device to compact the soil, and the backfill material to compact the soil. Microbial grouting reinforcement technology is a new type of ground reinforcement method in recent years. It injects microbial bacteria solution and nutrient salt into the soil, and the injected slurry diffuses between the pores of the soil particles. By using the mineralization of microorganisms and soil particles, calcium carbonate crystals are quickly gelled to enhance the mechanical properties of the soil and improve the strength and stiffness of the soil.

[0004] Due to the high gravel content in coral soil, vibroflotation is suitable for reinforcing the foundation, and the formation of gravel piles during vibroflotation can effectively improve the overall strength and liquefaction resistance of the soil. However, engineering practice shows that if the process control is not good during the filling process, it often causes uneven particle size and poor gradation of the fill material, and there is a risk of uneven settlement during vibroflotation reinforcement. The quality of the fill ground is difficult to guarantee. On the other hand, microbial grouting reinforcement technology is green and environmentally friendly, has fast repair speed, and has little impact on the natural environment of the soil. However, this method requires multiple injections of bacteria solution and slurry with long intervals of several hours, which is complex and time-consuming. UTILITY MODEL CONTENT

[0005] To solve the above problems, the utility model provides a kind of ground treatment device in combination with microbial grouting and dry method vibroflotation, realizes the organic combination of two kinds of ground treatment technology, and improves the ground treatment effect.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A kind of ground treatment device in combination with microbial grouting and dry method vibroflotation, including by upper and lower connection in proper order hoist head, boom, shock absorber and excitation body;

[0008] The bottom end of the excitation body has a gas outlet;

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

[0010] The inside of the head, the boom, the damper and the excitation body is provided with a gas supply channel, a grouting channel and a cooling channel in communication with the external supply system; the gas supply channel is in communication with the gas outlet, the grouting channel is in communication with the grouting nozzle, and the cooling channel is an internal circulation channel and is arranged on the inside of the gas supply channel and attached to the outside of the excitation part at the center of the inside of the excitation body.

[0011] Through the above technical scheme, the utility model integrates the vibration and grouting functions, realizes the collaborative operation of vibration and grouting, improves the construction efficiency, and reduces the switching of construction equipment and the construction process. The soil pores are enlarged by vibration, and then the pores are filled by grouting, which can better fill the complex pore structure in the soil and improve the bearing capacity and stability of the foundation. The setting of the cooling channel can effectively reduce the heat generated by the hydraulic system during operation, protect the equipment from high temperature damage, and prolong the service life of the equipment. The cooling channel forms a heat shield to prevent the heat generated by the hydraulic system from being transferred to the grouting channel, avoid the chemical reaction of the grouting medium due to temperature rise, and ensure the grouting effect.

[0012] Preferably, in the above-mentioned ground treatment device combining microbial grouting and dry vibration, the number of grouting nozzles is multiple, and they are uniformly arranged around the outer wall of the excitation body. Multiple grouting nozzles are uniformly arranged around the excitation body, which can make the grouting medium uniformly distributed in the soil, improve the uniformity and integrity of the foundation reinforcement. The uniformly distributed grouting nozzles can better fill the pores in the soil, reduce the grouting dead angle, and enhance the bearing capacity and anti-liquefaction capacity of the foundation. For complex foundations such as coral foundation and soft foundation, uniform grouting can better adapt to the complex pore structure and improve the reinforcement effect.

[0013] Preferably, in the above-mentioned ground treatment device combining microbial grouting and dry vibration, the supply system includes a slurry chamber and a cooling water chamber, the slurry chamber is connected to one end of the grouting channel away from the grouting nozzle through a grouting pipeline, and the cooling water chamber is connected to the cooling channel through a water inlet pipe and a water return pipe to form a circulation loop. Integrating slurry supply and cooling water supply simplifies the equipment structure, improves the compactness and operation convenience of the equipment. The slurry chamber is connected to the grouting channel through the grouting pipeline, which can stably transport slurry to the grouting channel and ensure the continuity and stability of the grouting process. The cooling water chamber forms a circulation loop with the cooling channel through the water inlet pipe and the water return pipe, which can efficiently remove the heat generated by the hydraulic system and ensure the stability and reliability of the equipment during long-term operation. The cooling water is recycled, reducing the consumption of cooling water and the operating cost of the equipment, in line with the green and low-carbon concept.

[0014] Preferably, in the above-mentioned ground treatment device combining microbial grouting and dry vibroflotation, a grouting pump, a first pressure gauge and a control valve are arranged on the grouting pipeline; a water pump, a second pressure gauge and a one-way valve are arranged on the water inlet pipe. The grouting pump and the control valve on the grouting pipeline can accurately control the grouting pressure, flexibly adjust the grouting pressure according to different soil and ground conditions, and improve the grouting effect. The first pressure gauge can monitor the grouting pressure in real time, and the operator can adjust the grouting parameters in time according to the reading of the pressure gauge to ensure the smooth progress of the grouting process. The water pump and the one-way valve on the water inlet pipe can accurately control the flow of cooling water to ensure the stable supply of cooling water, and the one-way valve prevents backflow of cooling water to improve the reliability of the cooling system. By accurately controlling the grouting pressure and the flow of cooling water, equipment damage caused by excessive pressure or insufficient cooling water can be avoided, and the safety and reliability of the equipment can be improved.

[0015] Preferably, in the above-mentioned ground treatment device combining microbial grouting and dry vibroflotation, the slurry chamber and the cooling water chamber are provided with a liquid refrigeration mechanism. The liquid refrigeration mechanism can keep the slurry in the slurry chamber at a low temperature state to prevent the slurry from reacting prematurely during storage, ensuring the stability of the slurry and the grouting effect. The low-temperature environment can prolong the shelf life of the microbial slurry, reduce the waste of slurry, and reduce the construction cost. The liquid refrigeration mechanism in the cooling water chamber can ensure the low-temperature supply of cooling water, improve the cooling efficiency, and better protect the hydraulic system from high-temperature damage. In a high-temperature construction environment, the liquid refrigeration mechanism can ensure the temperature stability of the slurry and the cooling water, ensuring the normal operation of the equipment and the microbial grouting effect is not affected.

[0016] Preferably, in the above-mentioned ground treatment device combining microbial grouting and dry vibroflotation, the supply system further comprises an air pump installed on the top of the hanging head, and 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 to ensure the high-pressure air jet from the air outlet and provide a stable air source for the vibroflotation process. The jet of high-pressure air can enhance the vibroflotation effect, making it easier for the vibroflotation device to drill into the soil and improving the vibroflotation efficiency. The air supply pressure can be flexibly adjusted by the air pump to optimize the vibroflotation parameters according to different soil and construction requirements, improving the adaptability and construction effect of the equipment. The air pump is installed on the top of the hanging head, which has a compact structure and reduces the floor area occupied by the equipment, improving the integration and operation convenience of the equipment.

[0017] Preferably, in the above-mentioned ground treatment device combining microbial grouting and dry method vibroflotation, a gas pressure sensor is arranged at the air outlet. The gas pressure sensor can monitor the gas pressure at the air outlet in real time, and the operator can adjust the air supply pressure of the air pump in time according to the feedback signal of the gas pressure sensor, so as to ensure the stability and effectiveness of the vibroflotation process. The gas pressure sensor can be connected with the control system of the air pump to automatically control the air supply pressure, and when the gas pressure is too high or too low, the system can automatically adjust or alarm, thereby improving the safety and reliability of the equipment. By monitoring the gas pressure in real time, the operator can optimize the vibroflotation parameters according to the actual construction situation, thereby improving the construction efficiency and quality. The arrangement of the gas pressure sensor reduces the frequent adjustment of the gas pressure by the operator, reduces the labor intensity of the operator, and improves the automation degree of the construction.

[0018] Preferably, in the above-mentioned ground treatment device combining microbial grouting and dry method vibroflotation, the pipe wall of the grouting channel has a sandwich layer, and the sandwich layer is a nano aerogel thermal insulation layer. The nano aerogel is a high-efficiency thermal insulation material with extremely low thermal conductivity, which can significantly reduce the heat transfer in the grouting channel and ensure the stability of the slurry temperature. The thermal insulation layer can effectively prevent the heat generated by the hydraulic system from being transferred to the grouting channel, avoid the premature chemical reaction of the slurry due to temperature rise, and ensure the grouting effect. The stable temperature environment can prolong the service life of the slurry in the grouting channel, reduce the waste of the slurry, and reduce the construction cost. The thermal insulation layer ensures the temperature stability of the slurry during grouting, so that the slurry can be sprayed out and chemically reacted within the optimal temperature range, thereby improving the construction quality.

[0019] Preferably, in the above-mentioned ground treatment device combining microbial grouting and dry method vibroflotation, the excitation body adopts a hydraulic power driven hydraulic motor as a power source, and the hydraulic motor drives the eccentric shaft to rotate through a shaft coupling, thereby generating horizontal excitation force and amplitude distributed along the axial direction of the main shaft. The hydraulic power driven hydraulic motor can provide powerful power, drive the eccentric shaft to rotate through the shaft coupling, generate efficient horizontal excitation force and amplitude, and improve the vibroflotation effect. The rotation speed of the hydraulic motor is easy to adjust and has a wide adjustment range, so that the vibration frequency can be flexibly adjusted according to different soil and construction requirements, thereby enhancing the adaptability and construction effect of the equipment. The hydraulic system has higher stability and reliability than the traditional motor system, and can stably operate in complex construction environments to reduce equipment failures. The hydraulic system can accurately control the power output according to the actual construction demand, avoid unnecessary energy waste, reduce the energy consumption of the equipment, and meet the green and low-carbon concept.

[0020] According to the above technical solutions, compared with the prior art, the ground treatment device combining microbial grouting and dry method vibroflotation has the following advantages:

[0021] 1. The present application solves the problem of poor reinforcement effect of traditional vibroflotation device for special foundation, and effectively fills the pores and bonds the soil particles by combining microbial grouting with vibroflotation, thereby improving the bearing capacity and anti-liquefaction capacity of the foundation.

[0022] 2. The present application promotes the flow of slurry in the soil pores by combining vibration and grouting, improves the uniformity of reinforcement, prevents the bacterial solution from remaining on the grouting pipe wall, and reduces the risk of blockage. Moreover, the grouting cooperates with the vibration effect to diffuse to the surrounding area, thereby achieving a larger reinforcement range and higher integrity.

[0023] 3. The present application designs a circulating water cooling system to take away the heat generated by the hydraulic system, avoids overheating of the equipment, and achieves the effect of protecting the equipment. At the same time, a heat shield is formed to effectively isolate the hydraulic vibration system and the grouting system, so that the temperature of the slurry does not rise rapidly to affect the microbial grouting.

[0024] 4. The present application effectively combines dry vibroflotation and microbial grouting to avoid the dilution and loss of bacterial solution caused by traditional water flushing method, which destroys the calcium carbonate crystal framework formed and affects reinforcement.

[0025] 5. The present application uses temperature control method for microbial grouting, mixes bacterial solution and cementing solution without reaction, effectively avoids traditional multiple distributed grouting, simplifies the construction process, and shortens the construction time.

[0026] 6. The present application has a wider application range and strong adaptability. The frequency of the hydraulic vibration system is more convenient to adjust than that of the traditional motor vibroflotator, and the adjustment range is wider. The grouting system can adjust the grouting pressure through a pressure gauge and a grouting pump. Different vibration frequencies and grouting pressures can be adjusted according to different soil and foundation conditions, and real-time adjustment can be made according to the reinforcement condition.

[0027] 7. Environmentally friendly and sustainable: dry vibroflotation has no mud pollution compared with traditional water flushing method, and microbial reinforcement technology has less pollution and is green and environmentally friendly, which meets the green and low-carbon concept, promotes the sustainable development of civil engineering, and has good ecological and social benefits. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and those skilled in the art can obtain other drawings according to the provided drawings without creating any creative labor.

[0029] Figure 1 The accompanying drawings are structural schematic diagrams of the dry vibroflotation device with microbial grouting function provided by the present application;

[0030] Figure 2The drawing is an internal structure schematic view of the excitation body provided by the utility model;

[0031] Figure 3 The drawing is a top view of the excitation body provided by the utility model.

[0032] Among them:

[0033] 1 - the head; 2 - the boom; 3 - the damper; 4 - the excitation body; 5 - the gas outlet; 6 - the grouting nozzle; 7 - the gas supply channel; 8 - the grouting channel; 9 - the cooling channel; 10 - the slurry chamber; 11 - the cooling water chamber; 12 - the grouting pipeline; 13 - the water inlet pipe; 14 - the water return pipe; 15 - the grouting pump; 16 - the first pressure gauge; 17 - the control valve; 18 - the water pump; 19 - the second pressure gauge; 20 - the check valve; 21 - the air pump; 22 - the air pressure sensor. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0035] Referring to the drawings Figure 1 to the drawings Figure 3 The utility model embodiment discloses a kind of foundation treatment devices of combining microbial grouting and dry method vibration, including by upper and lower sequentially connected head 1, boom 2, damper 3 and excitation body 4;

[0036] The bottom end of excitation body 4 has gas outlet 5;

[0037] The outer side wall of excitation body 4 is equipped with grouting nozzle 6;

[0038] The inside of head 1, boom 2, damper 3 and excitation body 4 is equipped with gas supply channel 7, grouting channel 8 and cooling channel 9 communicated with the supply system of outside;Gas supply channel 7 is communicated with gas outlet 5, grouting channel 8 is communicated with grouting nozzle 6, cooling channel 9 is internal circulation channel, and is arranged in the inside of gas supply channel 7, and is attached to the outside of the excitation part around the inside center of excitation body 4.

[0039] In order to further optimize the above technical solutions, the number of grouting nozzle 6 is multiple, and is evenly arranged around the outer side wall of excitation body 4.

[0040] In order to further optimize the above technical scheme, the supply system comprises a slurry chamber 10 and a cooling water chamber 11, the slurry chamber 10 is connected with the grouting channel 8 through a grouting pipeline 12 away from the grouting nozzle 6, and the cooling water chamber 11 is connected with the cooling channel 9 through a water inlet pipe 13 and a water return pipe 14 to form a circulating loop.

[0041] In order to further optimize the above technical scheme, the grouting pipeline 12 is provided with a grouting pump 15, a first pressure gauge 16 and a control valve 17; the water inlet pipe 13 is provided with a water pump 18, a second pressure gauge 19 and a one-way valve 20.

[0042] In order to further optimize the above technical scheme, the slurry chamber 10 and the cooling water chamber 11 are provided with a liquid refrigeration mechanism.

[0043] In order to further optimize the above technical scheme, the supply system further comprises an air pump 21 installed on the top of the hanging head 1, and the air pump 21 is connected with the air supply channel 7 away from the air outlet 5.

[0044] In order to further optimize the above technical scheme, the air pressure pressure sensor 22 is arranged at the air outlet 5.

[0045] In order to further optimize the above technical scheme, the pipe wall of the grouting channel 8 has a sandwich layer, and the sandwich layer is a nano aerogel thermal insulation layer.

[0046] In order to further optimize the above technical scheme, the exciting body 4 adopts a hydraulic power driven hydraulic motor as a power, the hydraulic motor drives the eccentric shaft to rotate through a shaft coupling, and then generates horizontal exciting force and amplitude distributed along the axial direction of the main shaft. Thus, the vibrator completes the work of efficiently vibrating and compacting the surrounding soil. The frequency of the hydraulic vibrator is more easily adjusted, and the adjustment range is wider.

[0047] The method of the dry method vibrator with the microorganism grouting function provided by the embodiment is as follows: first, the ground is vibrated and compacted by the vibration of the exciting body 4 and the high-pressure air jet of the air outlet 5; then, when the exciting body 4 is completely below the ground, the grouting is performed through the grouting nozzle 6, and in this process, the chemical reaction of the grouting medium after being jetted out is controlled by reducing the temperature.

[0048] The bacteria liquid mentioned in the embodiment is bacteria paste Bacillus pasteurii (DSM33) (also known as Bacillus pasteurii). The cementing liquid mentioned is a mixed solution of urea and calcium chloride.

[0049] The slurry chamber 10 is a mixed solution of the bacteria liquid and the cementing liquid, when the temperature is lower than 10℃, the activity of the bacteria is basically zero, the bacteria liquid and the cementing liquid do not react, and the bacteria liquid and the cementing liquid are mixed and placed in the slurry chamber 10 in advance for refrigeration. The temperature control method is used to prevent the distribution injection, so that the reinforcement process is complicated and time-consuming.

[0050] The inner wall of the grouting channel 8 is provided with a nano aerogel thermal insulation layer. Aerogel is a high-efficiency thermal insulation material, which has a very low thermal conductivity (0.012-0.020 W / (m·K)), far superior to traditional thermal insulation materials (such as glass wool, rock wool, etc.). For the grouting pipe, the thermal insulation performance of aerogel can significantly reduce heat loss, ensure that the slurry temperature is stable in the range of 5-8℃, and avoid premature reaction of the microbial slurry or temperature fluctuation affecting the reinforcement effect.

[0051] The hydraulic vibrator generates heat during operation. The cooling water is used to cool the hydraulic system, isolate the vibration system and the grouting system, and prevent the temperature of the slurry from rising.

[0052] The embodiment adopts dry vibration to prevent the water flushing of the traditional vibrator from affecting the grouting,

[0053] Method for use:

[0054] Open the one-way valve 20, and press the cooling water in the cooling water chamber 11 from the water inlet pipe 13 into the equipment through the water pump 18. The cooling water passes through the cooling channel 9, and then flows back to the cooling water chamber 11 from the water return pipe 14 for continuous circulation.

[0055] Lift the equipment with a crane, drive the hydraulic motor by hydraulic power, and drive the eccentric shaft to rotate at high speed through the shaft coupling to generate high-frequency vibration. At the same time, fill high-pressure air through the air pump 21. The high-pressure air passes through the air supply channel 7 and is finally sprayed out of the air outlet 5. Cooperate with the vibrator to vibrate and compact the ground. Under the combined action of vibration and compaction, the vibrator is drilled into the soil. The air pressure feedback by the air pressure sensor 22 can adjust the air pressure of the air pump 21 in real time.

[0056] When the excitation body 4 is below the ground, open the control valve 17 and start the grouting pump 15. When the grouting pump 15 is started to inject the bacterial solution, the excitation body 4 vibrates with the grouting pipe and the bacterial solution. During this period, the vibration frequency can be adjusted to make the bacterial solution uniformly distributed in the soil pores and prevent the bacterial solution from remaining on the grouting pipe wall. After the cementing solution and the microbial solution leave the device, the temperature gradually rises, reaches the reaction temperature, and fully reacts to generate calcium carbonate crystals to assist the excitation body to vibrate and compact the soil, thereby achieving the effect of reinforcing the soft foundation.

[0057] The main points of the embodiment are:

[0058] 1. Integrated design: deeply integrate the microbial grouting system and the vibration device to make them work synchronously and cooperatively. The microbial grouting system includes a bacterial solution tank, a grouting pump, a pressure gauge, and a corrosion-resistant conveying pipeline, which closely cooperate with the vibration device. At the same time, the overall layout of the equipment is carefully planned to ensure that the vibration of the vibration device and the microbial grouting system do not interfere with each other, achieving the design goals of compact structure, convenient operation, and easy maintenance.

[0059] 2. Temperature-controlled premixed grouting system: The built-in liquid refrigeration device maintains a low-temperature environment of 5-8℃, realizing the premixing and storage of bacterial solution (Bacillus pasteurii solution) and cementing solution (urea and calcium chloride mixed solution). By using gradient temperature control technology, the temperature of the slurry is ≤10℃ during underground operation. The built-in nano aerogel thermal insulation layer in the grouting pipeline ensures that the slurry temperature does not rise in a short time. After being sprayed, it is naturally warmed to 25-30℃ by the ground temperature to trigger the reaction, effectively avoiding the cumbersome process of traditional step-by-step grouting, simplifying the construction steps and shortening the construction time.

[0060] 3. Vibration-grouting-cooling collaborative structure: The cooling water channel surrounds the hydraulic excitation body, forming a heat shield to reduce the influence of heat release of the hydraulic device on the grouting system, ensuring the stability of the slurry and preventing the bacterial solution and cementing solution from reacting prematurely. The vibration frequency and grouting pressure are intelligently linked, making it easy to adjust the frequency of the hydraulic vibrator. According to different soil and foundation conditions, the construction parameters can be flexibly adjusted to enhance the adaptability of the equipment.

[0061] 4. Optimizing the effect of microbial grouting: By combining vibration and grouting, the flow of slurry in soil pores is promoted, and the uniformity of reinforcement is improved. Vibration can also prevent bacterial solution from remaining on the grouting pipe wall, reducing the risk of blockage. Grouting combined with vibration makes the reinforcement range larger and improves the overall integrity of the foundation.

[0062] 5. Dry vibration method: Abandoning the water flushing method of traditional vibration method, effectively avoiding the dilution and loss of bacterial solution caused by water flushing, and the damage to the formed calcium carbonate crystal framework caused by water flushing, ensuring that the effect of microbial grouting is not affected, and better exerting the reinforcement advantages of microbial grouting combined with vibration method.

[0063] This embodiment is mainly applied to various complex foundation reinforcement scenarios in the field of civil engineering, especially for coral foundation, soft foundation, foundation with cavities and cracks, and uneven settlement problems, etc. It can be widely used in high-rise building foundation, transportation hub foundation (such as airport runway, railway foundation, etc.), large bridge foundation, water conservancy and hydropower engineering dam foundation, and various foundation reinforcement engineering related to ocean development. Through precise intelligent control and efficient grouting and vibration cooperation, the bearing capacity and stability of the foundation are significantly improved, the risk of earthquake liquefaction is effectively resisted, and the safety and stability of various engineering structures in the whole life cycle are effectively guaranteed, laying a solid foundation for civil engineering construction, and promoting the high-quality development and sustainability of engineering construction.

[0064] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part.

[0065] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended 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 foundation treatment device combining microbial grouting and dry vibration, comprising a hanging head (1), a hanging rod (2), a shock absorber (3) and a vibration exciter (4) connected in sequence from top to bottom; characterized in that: the bottom end of the vibration exciter (4) is provided with an air outlet (5); the outer side wall of the vibration exciter (4) is provided with a grouting nozzle (6); the inside of the hanging head (1), the hanging rod (2), the shock absorber (3) and the vibration exciter (4) is provided with a gas supply channel (7), a grouting channel (8) and a cooling channel (9) in communication with the outside supply system; the gas supply channel (7) is in communication with the air outlet (5), the grouting channel (8) is in communication with the grouting nozzle (6), and the cooling channel (9) is an internal circulation channel and is arranged on the inside of the gas supply channel (7) and attached to the outside of the vibration excitation part in the center of the inside of the vibration exciter (4). The number of grouting nozzles (6) is multiple, and they are uniformly arranged around the outer side wall of the vibration exciter (4). The supply system comprises a slurry chamber (10) and a cooling water chamber (11), the slurry chamber (10) is connected to one end of the grouting channel (8) away from the grouting nozzle (6) through a grouting pipeline (12), the cooling water chamber (11) is connected to the cooling channel (9) through a water inlet pipe (13) and a water return pipe (14) to form a circulation loop. The grouting pipeline (12) is provided with a grouting pump (15), a first pressure gauge (16) and a control valve (17); the water inlet pipe (13) is provided with a water pump (18), a second pressure gauge (19) and a one-way valve (20).

2. The ground treatment apparatus according to claim 1, wherein The slurry chamber (10) and the cooling water chamber (11) are provided with a liquid refrigeration mechanism.

3. The ground treatment apparatus of claim 1, wherein, The supply system further comprises an air pump (21) installed on the top of the hanging head (1), and the air pump (21) is connected to one end of the gas supply channel (7) away from the air outlet (5).

4. The ground treatment apparatus according to claim 3, wherein An air pressure pressure sensor (22) is arranged at the air outlet (5).

5. The ground treatment apparatus according to claim 3 or 4, wherein The pipe wall of the grouting channel (8) has a sandwich layer, and the sandwich layer is a nano aerogel thermal insulation layer.

6. The ground treatment apparatus according to claim 3 or 4, wherein The vibration exciter (4) adopts a hydraulic power driven hydraulic motor as the power, the hydraulic motor drives the eccentric shaft to rotate through the shaft coupling, and then generates horizontal vibration excitation force and amplitude distributed along the axial direction of the main shaft.

7. The ground treatment apparatus according to claim 6, wherein ​ 8. The ground treatment apparatus of claim 1, wherein, ​ 9. The ground treatment apparatus of claim 1, wherein, ​

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