Intelligent piling machine adopting variable-frequency vibration water vapor compaction method

Abstract

The intelligent piling machine adopting the variable-frequency vibration water vapor compaction method comprises a chassis, a mast, a winch, a vibration hammer and a vibration rod, the vibration rod is installed on the vibration hammer, a nozzle is arranged at the lower end of the vibration rod, the intelligent piling machine further comprises a water and gas supply system, and the water and gas supply system comprises a gas storage tank, a water storage tank and an air compressor; a water supply pipe is arranged at the bottom of the air storage tank, an air supply pipe is arranged at the bottom of the air storage tank, and the end of the water supply pipe and the end of the air supply pipe are connected with the vibration rod through conveying pipes. A pneumatic valve I is mounted on the pipeline between the air storage tank and the water storage tank, a pneumatic valve II is mounted on the water supply pipe, a pneumatic valve III is mounted on the air supply pipe, and a pneumatic valve IV is mounted on the pipeline between the water pump and the water storage tank; when the pile machine drills downwards through the vibration rod, water, air or water vapor mixed with water and air can be selectively sprayed to the soil through the nozzles according to the water content of the soil, so that the component density of the soil is changed, the soil structure is reinforced, the work efficiency is improved, and the construction cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to loose soil ground treatment technical field, concretely is a kind of frequency conversion vibration water vapor compacting method intelligent pile machine. BACKGROUND

[0002] Loose soil is not a specific soil classification, but a relative concept used to describe the physical state of soil. Loose soil generally refers to those soils that have no cohesive force between particles, are loose in nature, and are mainly composed of particles of 0.075mm to 2mm in size and have no plasticity. Such soils are widely distributed in Quaternary deposits and modern coastal, river, lake and desert areas.

[0003] Sand soil is a typical example of loose soil, as it has no cohesive force between particles, is loose in nature, and is mainly composed of particles of 0.075mm to 2mm in size and has no plasticity. Sand soil can be divided into coarse sand, medium sand, fine sand and silt according to particle size composition. In addition, the degree of soil looseness can also be judged by other indicators, such as the number of standard penetration test hammer blows (N value) or other in-situ test indicators. For example, if the Ps value of silt and fine sand is less than 5.0MPa or the N value is less than 10, it can be considered to be loose. These indicators reflect the mechanical properties of the soil, which is of great significance for foundation treatment, earthwork engineering and other engineering practices.

[0004] The conventional methods for reinforcing and treating loose soil mainly include the following:

[0005] 1. Replacement cushion method: The soft soil layer within a certain range under the foundation bottom surface is excavated, then the stable and non-erosive materials such as sand, gravel, plain soil and lime soil with higher strength are filled in layers and compacted to the required density. This method is suitable for the treatment of shallow soft foundation and non-uniform foundation, and its main functions are to improve the bearing capacity of the foundation, reduce the settlement amount, accelerate the drainage and consolidation of the soft soil layer, prevent frost heaving and eliminate the swelling and shrinking of expansive soil.

[0006] 2. Dynamic compaction method: A heavy hammer (100-2000kN) is lifted to a certain height (10-40m) and allowed to fall freely to generate a strong dynamic stress to compact the soil. This method is suitable for treating gravel soil, sand soil, low-saturation clay, collapsible loess, miscellaneous fill and plain fill foundations. Dynamic compaction method is mainly used to improve the strength of soil, reduce compressibility, improve the ability of soil to resist vibration liquefaction and eliminate the collapsibility of soil.

[0007] 3. Sand pile method: suitable for compacting loose sand, silt, clay, plain fill, miscellaneous fill and other foundations to improve the bearing capacity and reduce the compressibility of the foundation. It can also be used to treat liquefiable foundations. For saturated clay foundation with loose deformation control, sand pile replacement treatment can be used to form composite foundation with sand pile and soft clay, accelerate the drainage consolidation of soft soil and improve the bearing capacity of foundation.

[0008] 4. Vibroflotation method: usually called vibroflotation method with filler. Vibroflotation method is suitable for treating sand, silt, silty clay, plain fill and miscellaneous fill foundations. Vibroflotation pile is mainly used to improve the bearing capacity of foundation and reduce the settlement of foundation. It can also be used to improve the anti-sliding stability of loess slope or the shear strength of soil.

[0009] 5. Cement soil mixing method: divided into slurry deep mixing method (referred to as wet method) and powder spraying mixing method (referred to as dry method). It is suitable for treating normally consolidated silt, silt soil, clay, saturated loess, plain fill and saturated loose sand foundation with no flowing underground water. It is not suitable for treating peat soil, clay with plasticity index greater than 25, underground water with corrosive property and high organic matter content foundation.

[0010] 6. High pressure jet grouting method: suitable for treating silt, silt soil, clay, silt and sand foundation. This method uses high pressure jet cement slurry to reinforce soil, improve its density and bearing capacity.

[0011] Through a large number of engineering practices, it is found that the traditional method basically uses reinforcing materials to treat loose soil, which has high construction cost, or large noise and vibration, and has serious influence on the surrounding environment. Practical new type content

[0012] The technical problem to be solved by the utility model is that the conventional reinforcement method for conventional loose soil has high cost and serious environmental impact, and a pile machine for intelligent operation method of variable frequency vibration water vapor compaction method for reinforcing loose soil is provided, so that the above problems are solved.

[0013] The technical problem to be solved by the utility model is solved by the following technical scheme, a variable frequency vibration water vapor compaction method intelligent pile machine, comprising a chassis, a mast, a winch, a vibration hammer and a vibration rod arranged on the chassis, the vibration rod is installed on the vibration hammer, the lower end of the vibration rod is provided with a nozzle, further comprising a water supply and gas supply system, the water supply and gas supply system comprises a gas storage tank, a water storage tank and an air compressor;

[0014] The air compressor is connected to the air storage tank via a pipe. The top of the air storage tank is connected to the top of the water storage tank via a pipe. A water supply pipe is installed at the bottom of the air storage tank. An air supply pipe is installed at the bottom of the air storage tank. The ends of the water supply pipe and the air supply pipe are connected to the vibrating rod via a delivery pipe to supply fluid to the nozzle. The system also includes a water pump that supplies water to the water storage tank. The water pump is connected to the water storage tank via a pipe.

[0015] A pneumatic valve I is installed on the pipeline between the gas tank and the water tank, a pneumatic valve II is installed on the water supply pipe, a pneumatic valve III is installed on the gas supply pipe, and a pneumatic valve IV is installed on the pipeline between the water pump and the water tank.

[0016] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the intelligent pile driver of the variable frequency vibration water vapor compaction method described above is equipped with a hydraulic workstation and a driver's cab on the chassis, and the driver's cab is equipped with an intelligent control cabinet and a frequency converter.

[0017] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the intelligent pile driver of the variable frequency vibration water vapor compaction method described above, wherein the vibrating rod has a channel for the fluid medium to pass through, and the channel is connected to the delivery pipe and the nozzle.

[0018] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the intelligent pile driver of the variable frequency vibration water vapor compaction method described above has a pressure relief pipe installed on the top of the water storage tank, and a pneumatic valve V is installed on the pressure relief pipe.

[0019] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the intelligent pile driver of the variable frequency vibration water vapor compaction method described above has a support installed on the outer wall of the middle part of the water tank to support the water tank, and a weight sensor is installed between the support and the water tank.

[0020] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the intelligent pile driver of the variable frequency vibration water vapor compaction method described above has a gas flow meter installed on the gas supply pipe.

[0021] Compared with the prior art, the beneficial technical effects of this utility model are: when the pile driver is drilling down through the vibrating rod, it can selectively spray water, air or water vapor mixed with air onto the soil through the nozzle according to the soil moisture content, thereby changing the soil composition and density, thus strengthening the soil structure, improving work efficiency and reducing project cost. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the pile driver and water and gas supply system of this utility model;

[0023] Figure 2 This is a schematic diagram of the intelligent operation and remote monitoring management system of this utility model;

[0024] Figure 3 This is a schematic diagram of the monitoring and management system of this utility model.

[0025] In the diagram, 1. Chassis; 2. Mast; 3. Winch; 4. Vibratory hammer; 5. Vibratory rod; 6. Nozzle; 7. Hydraulic workstation; 8. Cabin; 9. Intelligent control cabinet; 10. Frequency converter; 11. Air tank; 12. Water tank; 13. Air compressor; 14. Water supply pipe; 15. Air supply pipe; 16. Gas flow meter; 17. Weight sensor; 18. Pneumatic valve I; 19. Pneumatic valve II; 20. Pneumatic valve III; 21. Water pump; 22. Pneumatic valve IV; 23. Pneumatic valve V; 24. Delivery pipe. Detailed Implementation

[0026] The specific technical solutions of this utility model are further described below with reference to the accompanying drawings, so as to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0027] Example 1, referring to Figure 1 A variable frequency vibration water vapor compaction intelligent pile driver includes a chassis 1 and a mast 2, a winch 3, a vibratory hammer 4 and a vibratory rod 5 mounted on the chassis 1. The vibratory rod 5 is mounted on the vibratory hammer 4, and a nozzle 6 is provided at the lower end of the vibratory rod 5. A channel for fluid medium to pass through is reserved in the vibratory rod 5. The channel is connected to the conveying pipe 24 and the nozzle 6. The chassis 1 is also equipped with a hydraulic workstation 7 and a driver's cab 8. The driver's cab 8 is equipped with an intelligent control cabinet 9 and a frequency converter 10. It also includes a water and air supply system, which includes an air storage tank 11, a water storage tank 12 and an air compressor 13.

[0028] The air compressor 13 is connected to the air storage tank 11 via a pipe. The top of the air storage tank 11 is connected to the top of the water storage tank 12 via a pipe. A water supply pipe 14 is provided at the bottom of the air storage tank 11. An air supply pipe 15 is provided at the bottom of the air storage tank 11. A gas flow meter 16 is installed on the air supply pipe 15. The ends of the water supply pipe 14 and the air supply pipe 15 are connected to the vibrating rod 5 via a delivery pipe 24 to supply fluid to the nozzle 6. The system also includes a water pump 21 that supplies water to the water storage tank 12. The water pump 21 is connected to the water storage tank 12 via a pipe. A support is installed on the outer wall of the middle part of the water storage tank 12 to support the water storage tank 12. A weight sensor 17 is installed between the support and the water storage tank 12 to detect whether there is a change in the weight of the water storage tank 12.

[0029] A pneumatic valve I 18 is installed on the pipeline between the air tank 11 and the water tank 12. A pneumatic valve II 19 is installed on the water supply pipe 14. A pneumatic valve III 20 is installed on the air supply pipe 15. A pneumatic valve IV 22 is installed on the pipeline between the water pump 21 and the water tank 12. A pressure relief pipe is installed on the top of the water tank 12, and a pneumatic valve V 23 is installed on the pressure relief pipe.

[0030] When using this intelligent pile driver employing the variable frequency vibration water vapor compaction method:

[0031] 1. The air compressor 13 starts automatically. At this time, pneumatic valve I 18 and pneumatic valve III 20 are in the closed state, and the air tank 11 is restarted. When the pressure reaches the predetermined value, the air compressor 13 shuts down automatically.

[0032] 2. Water pump 21 starts automatically. At this time, water pneumatic valve IV 22 and pneumatic valve V 23 are opened, while pneumatic valve II 19 is closed, thereby delivering water to water storage tank 12. The weight sensor 17 installed on water storage tank 12 weighs the water entering water storage tank 12. When the weight of the water reaches the set value, water pump 21 stops automatically. At this time, pneumatic valve II 19, water pneumatic valve IV 22 and pneumatic valve V 23 are closed.

[0033] 3. When pneumatic valve I18 is opened, the high-pressure air in the air tank 11 enters the water tank 12 to pressurize the water tank 12. When the pressure in the water tank 12 reaches the set value, pneumatic valve I18 closes. The opening and closing of pneumatic valve I18 is based on ensuring the pressure in the water tank 12.

[0034] 4. Start the vibratory hammer 4 and winch 3. At this time, the wire rope on the winch 3 releases the vibratory hammer 4, causing the vibratory rod 5 to enter the soil. The drilling speed depends on the density of the soil layer. When the soil layer is dense, the drilling difficulty increases, resulting in a slower drilling speed. At this time, the frequency converter 10 automatically adjusts the vibration frequency of the vibratory hammer 4, so that the longitudinal vibration frequency is 14-18Hz, the longitudinal amplitude is 1.5~2m / min, the lateral vibration frequency is 20~22Hz, and the lateral amplitude is 1~2cm, so that it is close to the natural frequency of the soil layer, achieving a resonance effect, and keeping the vibratory rod 5 at a uniform drilling speed.

[0035] 5. Based on geological survey data and the moisture content of each soil layer, the spraying mode is automatically switched, allowing for the spraying of different media.

[0036] (1) When the soil moisture content is high, high pressure air is sprayed, pneumatic valve II 19 is closed and pneumatic valve III 20 is opened, and high pressure air is sprayed in a pulse manner. The interval between each air supply is 3-5 seconds, and the amount of gas used is automatically controlled by gas flow meter 16.

[0037] (2) When the soil moisture content is low, high pressure water is sprayed, pneumatic valve Ⅲ20 is closed and pneumatic valve Ⅱ19 is opened, and high pressure water is sprayed in a pulse manner. The interval between each water supply is 3-5 seconds. The amount of water used can be automatically controlled by the weight sensor 17 on the water storage tank 12.

[0038] (3) When the soil moisture content is moderate, high-pressure water vapor is sprayed. Pneumatic valve II 19 is opened to deliver high-pressure water. The water volume is automatically controlled by the weight sensor 17 on the water storage tank 12. When the water volume reaches the set value, which is generally set to 5-10 kg, pneumatic valve II 19 is closed and pneumatic valve III 20 is opened to deliver high-pressure air. When the air volume reaches the set value, which generally lasts for 2-3 seconds, pneumatic valve III 20 is closed. This process is carried out alternately, forming a stream of high-pressure water and a stream of high-pressure air in the delivery pipe 24. The high-pressure water vapor is sprayed out from the nozzle 6 at the lower end of the vibrating rod 5 through the delivery pipe 24.

[0039] 6. As the vibrating rod 5 vibrates and sinks in the soil, the soil particles are destroyed and recombined into a new soil structure under the combined action of the vibration of the vibrating rod 5 and high-pressure air, high-pressure water or high-pressure water vapor. The porosity of the loose soil decreases and the soil begins to become dense.

[0040] 7. Once the drill has reached the designed depth, begin lifting the drill bit (lift the vibratory rod 5).

[0041] 8. When lifting the vibrating rod 5, the vibrating hammer 4 maintains the vibrating rod 5 at a fixed vibration frequency. At this time, the vibrating rod 5 and the soil within the influence range of the sprayed medium become a mixture. No frequency conversion control is required during the lifting process, but air is required. The pressure is generally 0.1-0.2 MPa. Its function is to prevent the nozzle 6 from clogging. At the same time, the soil particles are more evenly distributed under the action of gas.

[0042] 9. When lifting vibratory rod 5, in order to ensure the compaction of the soil, a reverse insertion process is required. That is, after lifting 4m, it should be lowered 2m. This will create a cavity. When performing the reverse insertion process, filler should be placed at the hole opening. The filler can be the soil at the hole opening.

[0043] 10. Continue the reverse insertion process until the vibrating rod 5 is lifted out of the ground to complete the reinforcement of the loose soil foundation.

[0044] For information on monitoring and management systems, please refer to... Figures 2-3 It can consist of the following parts: on-site inspection, on-site monitoring and management, and monitoring center;

[0045] (1) When Internet terminal devices such as mobile phones, tablets, PCs, platform monitoring centers, and on-site inspection equipment obtain data, the data is sent from the scheduling server to the application server. The application server reads the data directly from the cache database, which can greatly reduce the reading pressure on the database server and return the data results more quickly.

[0046] (2) Because the modular data transmission frequency is 1-3 seconds, the quantity is large and the data volume is huge. We write the collected real-time data to a file and store it in an attachment server. If conditions permit, multiple attachment servers can be used in a cluster. The file stored in the attachment server contains the piling process data of all piling machines. Therefore, in the application system, this stored data can be called to simulate the original dynamic process of the operation.

[0047] (3) The data page display platform integrates a camera video monitoring system. Food flow data is displayed in real time through online live streaming to show the construction site situation. At the same time, after the data transmitted from the Internet of Things module is collected, it is integrated with WebSocket technology and synchronized to various terminal devices in real time to dynamically display the construction progress.

[0048] (4) The on-site monitoring and management center automatically generates original on-site construction records and statistical tables based on the received on-site construction parameters, eliminating human factors, ensuring the authenticity of the data, and significantly reducing labor costs.

[0049] (5) If there is a dispute after testing the completed loose soil reinforcement foundation, the construction process can be reviewed to find out the problem.

[0050] (6) In case of non-standard operation or special circumstances on site, instructions can be sent to the control cabinet of the intelligent pile driver of frequency-frequency vibration water vapor compaction method to terminate on-site construction and reduce losses.

Claims

1. A variable frequency vibration water vapor compaction intelligent pile driver, comprising a chassis and a mast, winch, vibratory hammer, and vibratory rod mounted on the chassis, wherein the vibratory rod is mounted on the vibratory hammer and a nozzle is provided at the lower end of the vibratory rod, characterized in that: It also includes a water and gas supply system, which includes a gas storage tank, a water storage tank, and an air compressor; The air compressor is connected to the air storage tank via a pipe. The top of the air storage tank is connected to the top of the water storage tank via a pipe. A water supply pipe is installed at the bottom of the air storage tank. An air supply pipe is installed at the bottom of the air storage tank. The ends of the water supply pipe and the air supply pipe are connected to the vibrating rod via a delivery pipe to supply fluid to the nozzle. The system also includes a water pump that supplies water to the water storage tank. The water pump is connected to the water storage tank via a pipe. A pneumatic valve I is installed on the pipeline between the gas tank and the water tank, a pneumatic valve II is installed on the water supply pipe, a pneumatic valve III is installed on the gas supply pipe, and a pneumatic valve IV is installed on the pipeline between the water pump and the water tank.

2. The intelligent pile driver using the variable frequency vibration water vapor compaction method according to claim 1, characterized in that: The chassis is also equipped with a hydraulic workstation and a driver's cab, with an intelligent control cabinet and frequency converter inside the cab.

3. The intelligent pile driver using the variable frequency vibration water vapor compaction method according to claim 1, characterized in that: The vibrating rod has a pre-reserved channel for the fluid medium to pass through, and this channel is connected to the delivery pipe and the nozzle.

4. The intelligent pile driver using the variable frequency vibration water vapor compaction method according to claim 1, characterized in that: A pressure relief pipe is installed on the top of the water storage tank, and a pneumatic valve V is installed on the pressure relief pipe.

5. The intelligent pile driver using the variable frequency vibration water vapor compaction method according to claim 1, characterized in that: A support is installed on the outer wall of the middle part of the water tank to support the water tank, and a weight sensor is installed between the support and the water tank.

6. The intelligent pile driver using the variable frequency vibration water vapor compaction method according to claim 1, characterized in that: A gas flow meter is installed on the gas supply pipe.

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