Grouting and vibroflotation combined foundation treatment device

Abstract

The utility model discloses a foundation treatment device combining grouting and vibroflotation, which relates to the technical field of civil engineering foundation treatment and comprises a hanging head, a hanging rod, a shock absorber, a motor and a vibration excitation body which are sequentially connected from top to bottom. A water injection nozzle 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; a water supply channel and a grouting channel which are communicated with an external supply system are arranged in the hanging head, the hanging rod, the shock absorber, the motor and the shock excitation body; the water supply channel is communicated with the water injection nozzle, and the grouting channel is communicated with the grouting nozzle. Two reinforcing modes of vibroflotation and grouting are organically combined, synchronous operation of vibroflotation and grouting is achieved through the water injection nozzles and the grouting nozzles, the soil body structure is improved through the vibration and scouring effects of the vibroflotation method, holes are filled with the grouting method, the soil body strength is enhanced, the advantages of the two methods are fully played, the defects of the single method are overcome, and the construction efficiency is improved. And the foundation reinforcement effect is obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of foundation treatment technology in civil engineering, and more specifically to a foundation treatment device that combines grouting and vibratory compaction. Background Technology

[0002] With the increasing frequency of marine development and coastal construction activities, as well as the growing demand for special engineering projects, the reinforcement of reclaimed land foundations is becoming more and more common. Reclaimed soil is characterized by its loose texture, wide gradation, and complex composition. Without foundation treatment, its bearing capacity cannot meet the requirements of the superstructure, making it prone to long-term settlement and carrying the risk of liquefaction during earthquakes. Vibro-compaction is a commonly used method for reinforcing reclaimed land foundations. This method treats the foundation through vibration, water flushing, and backfill compaction. However, vibro-compaction is not effective for fine-grained soil layers. Grouting is a method that involves injecting grout into the soil or rock strata. Through the filling, penetration, compaction, or cementing effects of the grout, the strength, impermeability, and stability of the foundation are enhanced. Grouting is suitable for various soil types, and the selection of grouting materials and pressure needs to be based on the soil properties. Utility Model Content

[0003] To improve the foundation reinforcement effect of vibro-compaction, this utility model provides a foundation treatment device that combines grouting and vibro-compaction, the technical solution of which is as follows:

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A foundation treatment device combining grouting and vibratory compaction includes a lifting head, a lifting rod, a vibration damper, a motor, and a vibratory exciter connected in sequence from top to bottom;

[0006] The bottom end of the vibrating body has a water spray nozzle;

[0007] The outer wall of the vibrating body is provided with a grouting nozzle;

[0008] The lifting head, the lifting rod, the vibration damper, the motor, and the exciter are provided with a water supply channel and a grouting channel that are connected to an external supply system; the water supply channel is connected to the water spray nozzle, and the grouting channel is connected to the grouting nozzle.

[0009] Through the above technical solution, this utility model organically combines vibratory compaction and grouting, achieving simultaneous operation of vibratory compaction and grouting via a spray nozzle and grouting head. It utilizes the vibration and scouring effects of vibratory compaction to improve soil structure, while grouting fills pores and enhances soil strength, fully leveraging the advantages of both methods and compensating for the shortcomings of a single method, significantly improving the foundation reinforcement effect. The components are connected sequentially to form an integrated device with a compact structure, facilitating operation and transportation, and suitable for use in various complex construction environments, thus improving the equipment's applicability and flexibility. The synergistic effect of vibratory compaction and grouting makes the soil more receptive to grout filling during vibration, accelerating grout diffusion in soil pores, shortening construction time, improving construction efficiency, and reducing project costs.

[0010] Preferably, the aforementioned foundation treatment device combining grouting and vibratory compaction further includes a monitoring module. This monitoring module comprises a pulse generator, an ultrasonic sensor, and an oscilloscope. The pulse generator is mounted on the vibrating body, while the ultrasonic sensor and oscilloscope are located externally to the equipment. The ultrasonic signal from the pulse generator is acquired by the ultrasonic sensor and converted into an electrical signal, which is then fed back to the oscilloscope. By emitting ultrasonic signals from the pulse generator and having the ultrasonic sensor acquire and feed these signals back to the oscilloscope, real-time monitoring of the foundation reinforcement process is achieved. Operators can monitor the grouting effect and soil reinforcement status in real time, promptly identify potential problems, avoid over- or under-grouting, and ensure construction quality. Based on the monitoring data, operators can precisely adjust construction parameters, such as grouting pressure and vibration frequency, to achieve refined control of the reinforcement process, improve the uniformity and reliability of the reinforcement, and enhance the overall performance of the foundation. The real-time monitoring function provides safety assurance for the construction process, avoiding problems such as foundation instability caused by poor reinforcement effects or unreasonable construction parameters, ensuring the safety and reliability of the project.

[0011] Preferably, in the aforementioned foundation treatment device combining grouting and vibratory compaction, the ultrasonic sensor and the oscilloscope are positioned close to the drilling point of the equipment. Positioning the ultrasonic sensor and oscilloscope close to the drilling point reduces signal attenuation and interference during transmission, improves the accuracy and reliability of monitoring data, and more realistically reflects the actual effect of foundation reinforcement. Positioning them close to the drilling point also facilitates direct on-site observation and operation by operators, allowing for timely adjustments to construction strategies, improving construction efficiency and quality, and also facilitating equipment installation and maintenance.

[0012] Preferably, in the aforementioned foundation treatment device combining grouting and vibratory compaction, 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 allows for uniform distribution of the grout in the soil, avoiding localized over- or under-grouting, improving the uniformity of reinforcement, and enhancing the overall performance of the foundation. The evenly distributed grouting nozzles allow the grout to diffuse more widely into the soil, expanding the reinforcement area and improving the stability and bearing capacity of the foundation, making it particularly suitable for large-area foundation reinforcement projects. The simultaneous operation of multiple nozzles reduces the grouting pressure of a single nozzle, decreasing the risk of nozzle clogging and improving the reliability and service life of the equipment.

[0013] Preferably, in the aforementioned foundation treatment device combining grouting and vibratory compaction, the supply system includes a water tank, a bacterial solution tank, and a cementing solution tank. The water tank is connected to the end of the water supply channel furthest from the nozzle via a water supply pipe. The bacterial solution tank and the cementing solution tank are respectively connected to the ends of the grouting channel furthest from the grouting nozzle via bacterial solution pipes and cementing solution pipes. The supply system can simultaneously provide water, bacterial solution, and cementing solution, supporting the application of microbial grouting technology. Through microbial mineralization, calcium carbonate crystals are generated, further enhancing the mechanical properties of the soil, improving the strength and stiffness of the foundation, while reducing environmental pollution, aligning with the green and low-carbon development concept. Each supply system is independently set up, allowing for flexible adjustment of the type and proportion of grouting materials according to different geological conditions and reinforcement requirements, achieving personalized reinforcement solutions and improving the adaptability and versatility of the equipment. The synergistic effect of water, bacterial solution, and cementing solution can rapidly improve soil properties, shorten reinforcement time, increase construction efficiency, and reduce project costs.

[0014] Preferably, in the aforementioned foundation treatment device combining grouting and vibratory compaction, the water supply pipe is equipped with a water pump, a first pressure gauge, and a first control valve. The water pump provides a stable water flow, the first pressure gauge monitors the water supply pressure in real time, and the first control valve regulates the water flow. These three components work together to precisely control the water injection volume, ensuring the smooth progress of the vibratory compaction process while avoiding water waste. By precisely controlling the water injection volume, the water supply pressure and flow rate can be adjusted according to different geological conditions, optimizing the vibratory compaction effect and enabling the soil to achieve better compaction and uniformity under vibration and scouring, thus improving the quality of foundation reinforcement. Precise pressure monitoring and control can prevent equipment damage or construction accidents caused by excessively high or low water supply pressure, ensuring the safety and reliability of the construction process.

[0015] Preferably, in the aforementioned foundation treatment device combining grouting and vibratory compaction, the bacterial solution pipe and the cementing liquid pipe are respectively equipped with a second control valve and a third control valve. The bacterial solution pipe and the cementing liquid pipe are connected to the end of the grouting channel furthest from the grouting nozzle after converging through the grouting main pipe. The grouting main pipe is equipped with a grouting pump and a second pressure gauge. The grouting volume of the bacterial solution and the cementing liquid can be adjusted separately through the second and third control valves. The grouting pump provides a stable grouting pressure, and the second pressure gauge monitors the grouting pressure in real time, achieving precise control of the grouting process and ensuring the uniformity and reliability of the grouting effect. Precise control of the grouting volume and pressure can prevent grout accumulation and blockage in the grouting pipe, extending the service life of the equipment and reducing equipment maintenance costs. By precisely controlling the injection sequence and ratio of the bacterial solution and the cementing liquid, the microbial mineralization effect can be better utilized, allowing calcium carbonate crystals to be evenly distributed in the soil, further improving the strength and stability of the foundation and optimizing the reinforcement effect.

[0016] Preferably, in the aforementioned foundation treatment device combining grouting and vibratory compaction, the vibrating body generates high-frequency vibration by rotating an eccentric block driven by a motor. This high-frequency vibration quickly loosens the soil, reducing its density and facilitating the penetration and diffusion of the grout. Simultaneously, the vibration makes the filler material more compact within the holes, improving the foundation's bearing capacity, shortening construction time, and increasing construction efficiency. The motor-driven vibration system provides stable vibration frequency and amplitude, ensuring the consistency and reliability of the vibratory compaction effect and avoiding uneven reinforcement or construction accidents caused by unstable vibration. The motor speed and the eccentricity of the eccentric block can be adjusted according to construction needs to achieve vibrations of different frequencies and amplitudes, enabling the equipment to adapt to different geological conditions and reinforcement requirements, thus improving its versatility and flexibility.

[0017] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a foundation treatment device that combines grouting and vibratory compaction, which has the following beneficial effects:

[0018] 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.

[0019] 2. Efficient Construction Process: Optimized construction steps are closely linked, reducing downtime and rework. Vibration-assisted grouting and filling accelerate grout diffusion and soil compaction, shortening the construction period, reducing costs, and enhancing the equipment's adaptability and competitiveness in complex engineering environments.

[0020] 3. This invention promotes the flow of grout in the soil pores by combining vibration and grouting, improving the uniformity of reinforcement and preventing grout residue on the grouting pipe wall, while reducing the risk of blockage. Furthermore, the grouting, combined with vibration, diffuses the reinforcement in all directions, resulting in a wider reinforcement range and higher overall integrity.

[0021] 4. The oscilloscope in the device can monitor the grouting effect in real time, allowing for simultaneous grouting, monitoring, and adjustment to ensure the uniformity of the reinforcement. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 The attached figure is a structural schematic diagram of the intelligent foundation treatment equipment that integrates grouting and vibratory compaction provided by this utility model;

[0024] Figure 2 The attached figure is a schematic diagram of the internal structure of the exciter provided by this utility model;

[0025] Figure 3 The attached figure is a top view of the exciter provided by this utility model.

[0026] in:

[0027] 1-Lifting head; 2-Lifting rod; 3-Vibration damper; 4-Motor; 5-Vibration body; 6-Water nozzle; 7-Grouting nozzle; 8-Water supply channel; 9-Grouting channel; 10-Pulse generator; 11-Ultrasonic sensor; 12-Oscilloscope; 13-Water tank; 14-Bacterial solution tank; 15-Cementitious liquid tank; 16-Water supply pipe; 17-Bacterial solution pipe; 18-Cementitious liquid pipe; 19-Water pump; 20-First pressure gauge; 21-First control valve; 22-Second control valve; 23-Third control valve; 24-Grouting main pipe; 25-Grouting pump; 26-Second pressure gauge. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] See appendix Figure 1 To be continued Figure 3 This utility model embodiment discloses a foundation treatment device that combines grouting and vibratory compaction, including a lifting head 1, a lifting rod 2, a vibration damper 3, a motor 4 and an exciter 5 connected in sequence from top to bottom;

[0030] The bottom end of the vibrator 5 has a water spray nozzle 6;

[0031] The outer wall of the vibrating body 5 is provided with a grouting nozzle 7;

[0032] The internal components of the lifting head 1, lifting rod 2, vibration damper 3, motor 4, and exciter 5 are equipped with a water supply channel 8 and a grouting channel 9 that are connected to the external supply system; the water supply channel 8 is connected to the water nozzle 6, and the grouting channel 9 is connected to the grouting nozzle 7.

[0033] To further optimize the above technical solution, a monitoring module is also included. The monitoring module includes a pulse generator 10, an ultrasonic sensor 11, and an oscilloscope 12. The pulse generator 10 is mounted on the exciter 5, and the ultrasonic sensor 11 and oscilloscope 12 are located outside the equipment. The ultrasonic signal of the pulse generator 10 is collected by the ultrasonic sensor 11 and converted into an electrical signal and fed back to the oscilloscope 12.

[0034] To further optimize the above technical solution, the ultrasonic sensor 11 and oscilloscope 12 are positioned close to the drilling point of the equipment.

[0035] To further optimize the above technical solution, the number of grouting nozzles 7 is multiple, and they are evenly arranged around the outer wall of the vibrating body 5.

[0036] To further optimize the above technical solution, the supply system includes a water tank 13, a bacterial liquid tank 14, and a cementing liquid tank 15. The water tank 13 is connected to the end of the water supply channel 8 away from the water nozzle 6 via a water supply pipe 16. The bacterial liquid tank 14 and the cementing liquid tank 15 are respectively connected to the end of the grouting channel 9 away from the grouting nozzle 7 via a bacterial liquid pipe 17 and a cementing liquid pipe 18.

[0037] To further optimize the above technical solution, a water pump 19, a first pressure gauge 20 and a first control valve 21 are provided on the water supply pipe 16.

[0038] To further optimize the above technical solution, a second control valve 22 and a third control valve 23 are respectively provided on the bacterial liquid pipe 17 and the cementing liquid pipe 18. After the bacterial liquid pipe 17 and the cementing liquid pipe 18 are merged through the grouting main pipe 24, they are connected to the end of the grouting channel 9 away from the grouting nozzle 7. A grouting pump 25 and a second pressure gauge 26 are provided on the grouting main pipe 24.

[0039] To further optimize the above technical solution, the exciter 5 drives the eccentric block to rotate via the motor 4 to generate high-frequency vibration.

[0040] 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.

[0041] How to use

[0042] Step 1: Place the oscilloscope 12 and ultrasonic sensor 11 next to the drilling location. Lift the equipment with a crane, and start the motor 4 using the principle of a traditional vibratory compactor to drive the eccentric block, causing the vibratory compactor to vibrate at high frequency. At the same time, open the first control valve 21 to start the water pump 19, and water will come out from the bottom spray nozzle 6. The high-pressure water jet will penetrate the soil under the combined action of vibration and compaction.

[0043] Step 2: When the vibrating body 5 is below ground level, open the second control valve 22 and start the grouting pump 25. While the grouting pump 25 injects the bacterial solution, the vibrating body 5 simultaneously vibrates, carrying the grouting pipeline and the bacterial solution. During this process, the vibration frequency can be adjusted to ensure the bacterial solution is evenly distributed in the soil pores and to prevent bacterial solution residue on the grouting pipe wall. After reaching the designated depth, close all valves, stop vibration, and allow the solution to stand, allowing the bacteria in the solution to fully adsorb onto the surface of the soil particles.

[0044] Step 3: After standing for a period of time, open the third control valve 23, start the grouting pump 25, and inject the cementing liquid. The grouting pressure is controlled by the grouting pump 25. At the same time, the vibrator 5 starts to vibrate and gradually fills the hole from the ground. Each section of filler is compacted under the action of vibration. After the required density is reached, the vibratory compactor is lifted. During the process, the ultrasonic signal emitted by the pulse generator 10 at the bottom of the control device is collected by the ultrasonic sensor 11 and converted into an electrical signal and fed back to the oscilloscope 12. The reinforcement effect is monitored in real time by the image fed back on the oscilloscope 12. Grouting, vibration, filling, monitoring and adjustment are carried out at the same time. Grouting, filling and compaction are repeated until the ground is reached, so as to form a large-diameter and very dense pile in the foundation. At the same time, the cementing solution and microbial liquid react fully to generate calcium carbonate crystals, thereby achieving the effect of reinforcing the soft foundation.

[0045] The key points of this embodiment are mainly reflected in:

[0046] 1. Integrated design of two reinforcement methods: vibratory compaction and microbial grouting

[0047] (1) Deeply integrate the microbial grouting system and the vibratory compaction device. The microbial grouting system includes components such as microbial liquid tank, grouting pump, pressure gauge, and corrosion-resistant conveying pipeline, ensuring that vibratory compaction and microbial grouting are carried out simultaneously and efficiently.

[0048] (2) Carefully plan the overall layout of the equipment to ensure that the vibration of the vibratory compaction device and the microbial grouting system work together seamlessly, avoid interference, and ensure that the equipment is compact, easy to operate and easy to maintain.

[0049] 2. Efficient construction process design

[0050] Optimized construction steps are closely linked, reducing downtime and rework. Vibration-assisted grouting and filling accelerate grout diffusion and soil compaction, shortening the construction period, reducing costs, and enhancing the equipment's adaptability and competitiveness in complex engineering environments.

[0051] 3. Optimize the effect of microbial grouting

[0052] 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.

[0053] 4. Real-time monitoring and adjustment of intelligent construction

[0054] The oscilloscope in the device can monitor the grouting effect in real time, allowing for simultaneous grouting, monitoring, and adjustment to ensure the uniformity of the reinforcement.

[0055] 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.

[0056] 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.

[0057] The above description of the disclosed embodiments enables those skilled in the art to make or use the present 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 present invention. Therefore, the present 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 foundation treatment device combining grouting and vibratory compaction, comprising, from top to bottom, a lifting head (1), a lifting rod (2), a vibration damper (3), a motor (4), and a vibrating body (5); characterized in that: The bottom end of the vibrator (5) has a water spray nozzle (6). The outer wall of the vibrating body (5) is provided with a grouting nozzle (7). The internal parts of the lifting head (1), the lifting rod (2), the vibration damper (3), the motor (4) and the exciter (5) are provided with a water supply channel (8) and a grouting channel (9) that are connected to the external supply system; the water supply channel (8) is connected to the water nozzle (6), and the grouting channel (9) is connected to the grouting nozzle (7).

2. The foundation treatment device combining grouting and vibratory compaction according to claim 1, characterized in that, It also includes a monitoring module, which includes a pulse generator (10), an ultrasonic sensor (11), and an oscilloscope (12). The pulse generator (10) is mounted on the exciter (5), and the ultrasonic sensor (11) and the oscilloscope (12) are located outside the equipment. The ultrasonic signal of the pulse generator (10) is collected by the ultrasonic sensor (11) and converted into an electrical signal and fed back to the oscilloscope (12).

3. A foundation treatment device combining grouting and vibratory compaction according to claim 2, characterized in that, The ultrasonic sensor (11) and the oscilloscope (12) are positioned near the hole in the equipment.

4. The foundation treatment device combining grouting and vibratory compaction according to claim 1, characterized in that, The number of grouting nozzles (7) is multiple, and they are evenly arranged around the outer wall of the vibrating body (5).

5. A foundation treatment device combining grouting and vibratory compaction according to claim 1, characterized in that, The supply system includes a water tank (13), a bacterial solution tank (14), and a cementing solution tank (15). The water tank (13) is connected to the end of the water supply channel (8) away from the water nozzle (6) via a water supply pipe (16). The bacterial solution tank (14) and the cementing solution tank (15) are respectively connected to the end of the grouting channel (9) away from the grouting nozzle (7) via a bacterial solution pipe (17) and a cementing solution pipe (18).

6. A foundation treatment device combining grouting and vibratory compaction according to claim 5, characterized in that, The water supply pipe (16) is equipped with a water pump (19), a first pressure gauge (20) and a first control valve (21).

7. A foundation treatment device combining grouting and vibratory compaction according to claim 5 or 6, characterized in that, The bacterial liquid pipe (17) and the cementing liquid pipe (18) are respectively equipped with a second control valve (22) and a third control valve (23). The bacterial liquid pipe (17) and the cementing liquid pipe (18) are connected to the end of the grouting channel (9) away from the grouting nozzle (7) after they are joined by the grouting main pipe (24). The grouting main pipe (24) is equipped with a grouting pump (25) and a second pressure gauge (26).

8. A foundation treatment device combining grouting and vibratory compaction according to claim 1, characterized in that, The exciter (5) drives the eccentric block to rotate through the motor (4) to generate high-frequency vibration.

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