Device for preparing composite foundation treatment pile body sections through deep modification of waste flow-state sludge

Abstract

The invention belongs to the technical field of foundation treatment in civil engineering, and discloses a device for preparing a composite foundation treatment pile body section through deep modification of waste flow-state sludge, which comprises a rigid frame, an electric hoisting mechanism, a pile body forming mechanism, a sliding bearing mechanism and a sliding releasing mechanism, the rigid frame and the electric hoisting mechanism are used for hoisting and fixing an upper closing cover of the pile body forming mechanism; the pile body forming mechanism is used for pressurizing, dehydrating and forming the mud subjected to flocculation-solidification conditioning; the sliding bearing mechanism is arranged on a rigid frame base of the device, bears the pile body forming mechanism and facilitates material filling. After the pile body sections are formed, the pile body can be separated from the pile body forming mechanism and temporarily stored or conveyed to a centralized place for maintenance through the sliding separation mechanism. Waste flow-state sludge is directly converted into a high-reinforcement solidified soil column capable of being used as a precast pile component, and then the high-reinforcement solidified soil column and a gravel drainage body are assembled, so that the effects of shortening the construction period, reducing post-construction settlement and improving the bearing capacity of a composite foundation are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation treatment in civil engineering, and in particular relates to a device for preparing composite foundation treatment pile segments by deeply modifying waste fluid sludge. Background Art

[0002] The current construction of infrastructure such as underwater transportation projects, slurry shield tunnels in soft soil areas, underground projects and pile foundation projects generates a large amount of waste fluidized mud (water content less than 200%). According to preliminary estimates, the construction and renovation of various types of infrastructure in my country generate hundreds of millions of cubic meters of waste fluidized mud each year. This type of waste fluidized mud has the following characteristics: (1) It has a high water content, which makes it difficult to transport it out and poses a risk of secondary environmental pollution; (2) It contains a large amount of bentonite and clay minerals, which makes it difficult to dehydrate and recycle it; (3) The soil conditions during construction are complex, and the waste fluidized mud contains not only extremely fine particles mainly composed of bentonite clay minerals, but also coarse particles represented by rock chips, gravel, etc.

[0003] At present, the waste fluid sludge disposal technology commonly used in the engineering community has many limitations when applied to modern green construction projects: on-site discharge or direct transportation, this method is simple and direct, but it will bring serious environmental problems; yard (or long-term sedimentation tank) sedimentation and air-drying treatment, due to the long consolidation and drainage time of the waste fluid sludge, this method requires long-term occupation of a large amount of land, and with the increasingly scarce urban land resources, it is bound to lead to an increase in yard treatment costs; mechanical dehydration treatment, the mud cake obtained after treatment has a high pH value, severe compaction and poor engineering mechanical properties, and it is also easy to cause pollutant diffusion after being washed by rainwater, and cannot be directly utilized as a resource; chemical solidification treatment method, this method is limited by the high water content of the waste fluid sludge, conventional solidification treatment can only utilize the waste fluid sludge as a general filler, and cannot achieve high-quality resource utilization of the waste sludge, and the economic added value of the resource product is not high.

[0004] On the other hand, when strengthening the foundation of underconsolidated soft soil in coastal city infrastructure construction, conventional methods include prefabricated pipe pile reinforcement, CFG pile reinforcement, cement soil mixing pile reinforcement or gravel pile reinforcement. However, prefabricated pipe pile and CFG pile reinforcement are expensive and may not perform well in underconsolidated soft soil (significant negative friction effect will occur); cement soil mixing pile has poor permeability, which is not conducive to the drainage and consolidation of the soil between piles (reinforcement effect); gravel pile has weak integrity and is prone to bulging damage after loading, and cannot alleviate the problem of sand and gravel shortage in coastal cities.

[0005] Through the above analysis, the problems and defects of the prior art are as follows:

[0006] (1) On-site discharge or direct transportation: This method is simple and direct, but it will cause serious environmental problems;

[0007] (2) Sedimentation in a storage yard (or long-term sedimentation tank) and air-drying. Since the waste liquid sludge takes a long time to solidify and drain, this method requires long-term occupation of a large amount of land, which will inevitably lead to an increase in storage yard treatment costs as urban land resources become increasingly scarce.

[0008] (3) Mechanical dehydration treatment: The mud cake obtained by this method has a high pH value, is severely compacted, and has poor engineering mechanical properties. It is also easy to cause pollutants to spread after being washed by rainwater and cannot be directly utilized as a resource.

[0009] (4) Chemical solidification treatment method: This method is limited by the high water content of the waste fluid sludge. Conventional solidification treatment can only recycle the waste fluid sludge into general filler, but cannot achieve high-quality resource utilization of the waste sludge. The economic added value of the resource product is not high. Summary of the invention

[0010] In view of the problems existing in the prior art, the present invention provides a device for preparing composite foundation treatment pile segments by deeply modifying waste fluid sludge.

[0011] The present invention is implemented in this way: a device for preparing composite foundation treatment pile segments by deep modification of waste fluidized sludge comprises:

[0012] A rigid frame and an electric lifting mechanism, a pile forming mechanism, a sliding bearing mechanism, and a sliding disengaging mechanism; the rigid frame and the electric lifting mechanism lift and fix the upper cover of the pile forming mechanism to ensure the stability of the entire device during the pile forming process; the pile forming mechanism has an inlet connected to the pumping mud pipeline, and the mud after flocculation-solidification conditioning filled into the permeable geotextile is dehydrated and formed under the pressure of the air bag, and the sieve plate at the bottom can effectively drain water; the sliding bearing mechanism is placed on the rigid frame base of the device, bearing the pile forming mechanism, and the pile forming mechanism can be slid out before filling the mud and after the pile is formed; after the pile segment is formed, the sliding disengaging mechanism can smoothly disengage the pile from the pile forming mechanism and temporarily store or transport it to a centralized area for subsequent processing.

[0013] Furthermore, the rigid frame and the electric lifting mechanism have a bearing chassis and a reaction frame, the reaction frame and the bearing chassis are fixedly connected by bolts, the bearing chassis includes universal wheels and a water receiving tray, and a water outlet port is welded at one end of the water receiving tray and connected to a water hose.

[0014] Furthermore, a hoisting motor is provided at the top of the reaction frame, and the hoisting motor is welded to the middle of the top of the reaction frame. The motor is wound around a traction wire rope, and a hook is provided at the end of the wire rope.

[0015] Furthermore, the rigid frame reaction frame is sleeved with a balancing steel plate, the middle part of which is provided with a threaded hole, which is bolted with a bolt buckle and can be bolted to the upper cover of the pile body forming mechanism.

[0016] Furthermore, the pile body forming mechanism is composed of an airbag extrusion mechanism and a forming cover, the airbag extrusion mechanism and the inner wall of the forming cover have the same size, and during the forming process, the airbag extrusion mechanism can be bolted and fixed to the forming cover.

[0017] Furthermore, the airbag extrusion mechanism is composed of a high-pressure airbag and a permeable geotextile. The front end of the high-pressure airbag is a round steel sheet with a pressure nozzle, the middle part is high-pressure tear-resistant rubber, and the tail end is a sealing round steel sheet. The permeable geotextile is made of polypropylene yarn through sewing, and its structure is a hollow cylinder when the mud mixture is filled.

[0018] Furthermore, the molded cover is composed of an upper and lower cover, and the cover is composed of an arc-shaped steel plate and a circular steel plate. The circular steel plate is welded to one end of the arc-shaped steel plate. The front end of the lower cover has a disc, and the middle of the upper cover has a threaded opening, which can be connected to the electric lifting mechanism.

[0019] Furthermore, the sliding bearing mechanism is placed on a rigid frame base, with sliding grooves at both ends, and the upper part is welded and fixed to the lower cover.

[0020] Furthermore, the sliding disengagement mechanism is composed of a movable tray and a pulling mechanism. The movable tray is composed of a thin arc-shaped steel plate and an end steel disc. The end of the original plate is provided with a bolt hook. The pulling mechanism is composed of an arc-shaped supporting plate and a hand-cranked pulling mechanism.

[0021] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the present invention are as follows:

[0022] First, the present invention uses a device for preparing composite foundation treatment pile segments by deeply modifying waste fluidized sludge. When in use, the upper cover and the horizontal steel plate of the reaction frame are bolted together, the electric lifting mechanism is started to lift the upper cover, the sliding bearing tray is pulled out, the sliding disengagement mechanism is stacked on the lower cover, and the high-pressure airbag is placed in the hollow water-permeable fabric. The front end of the airbag is bolted to the front end steel disc of the lower cover, the lower cover is lowered and closed with the upper cover, and the reinforcing valve is used for reinforcement. The treated mud is filled into the permeable fabric. After filling, the air pump is started to pressurize the high-pressure airbag. After the pile body is formed, the upper cover is opened and lifted, and the formed pile body is pulled out by the pulling mechanism of the sliding release device. Finally, the pile body can be temporarily stored or transported to a centralized location for maintenance; this set of devices can directly convert the waste fluid mud after flocculation and solidification into hollow cylindrical pile body segments, and effectively improve the mechanical properties of the dehydrated and compacted pile body with the help of the chemical reaction of the curing agent during storage and maintenance. The device can directly and efficiently modify the high-water content waste mud into high-performance pile body segments at one time, so that the pile body in the composite foundation has both drainage function and vertical stiffness, which can effectively reduce post-construction settlement and improve the bearing capacity of the foundation.

[0023] This application can effectively solve the problem of difficult terminal disposal of a large amount of waste fluid sludge (including eliminating the secondary pollution to the environment caused by the transportation of waste fluid sludge and avoiding the waste of land resources caused by the direct disposal of waste fluid sludge), and at the same time realize the green and high value-added recycling of fluid sludge;

[0024] The solidified soil columns produced by the present application have high strength after the combined flocculation-solidification treatment and the inflation extrusion drainage consolidation treatment. When reinforcing the foundation, no complicated concrete pipe piles are required as grouting pipes, while the amount of crushed stone is reduced, which greatly simplifies the process and can significantly save costs.

[0025] The reinforced solidified soil columns produced in this application can be directly assembled with the sand and gravel drainage body to form a composite foundation treatment pile segment, namely, a combined pile of solidified soil column and sand and gravel. This type of pile body has both drainage function and vertical stiffness, which can effectively reduce post-construction settlement and improve the bearing capacity of the foundation.

[0026] On the one hand, it can deeply modify the waste fluidized mud and realize the green and high value-added recycling of the fluidized mud; on the other hand, it can make the piles in the composite foundation have both drainage function and vertical stiffness, which can effectively reduce post-construction settlement and improve the bearing capacity of the foundation.

[0027] Second, as auxiliary evidence of the inventiveness of the claims of the present invention, it is also reflected in the following two important aspects:

[0028] (1) The expected benefits and commercial value of the technical solution of the present invention after transformation are:

[0029] The reinforced solidified soil piles produced by this application can achieve green and high value-added recycling of fluidized mud. This application can effectively treat a large amount of waste fluidized mud and significantly reduce the high cost required for traditional fluidized mud treatment methods. At the same time, this application reduces the occupation of land resources by fluidized mud and the pollution pressure on the environment. At a time when land resources are becoming increasingly precious, it avoids the hidden costs caused by long-term occupation of land due to mud stacking, and reduces the huge fines and governance costs that may be caused by environmental pollution. It is in line with the increasingly stringent environmental protection policy orientation.

[0030] Compared with traditional pile foundation materials, the reinforced solidified soil piles made in this application have significantly lower material costs. At the same time, the composite foundation treatment pile segments assembled with the sand and gravel drainage body have both drainage functions and vertical stiffness, which can effectively reduce post-construction settlement and improve the bearing capacity of the foundation, reduce later maintenance costs and extend service life. Overall, a large amount of costs can be saved during the entire life cycle of the project.

[0031] (2) Whether the technical solution of the present invention solves the technical problems that people have been eager to solve but have never been able to solve successfully:

[0032] This application conducts in-depth research and innovative design on the characteristics of a large amount of waste fluidized mud. By subjecting the flocculated-solidified conditioned mud to a special pressurized dehydration treatment, the fluidized mud is successfully converted into a reinforced solidified soil pile material with practical value, thus realizing the conversion of fluidized mud from waste to building material. This solution not only effectively solves the treatment problem of fluidized mud and avoids a series of drawbacks brought about by previous treatment methods, but also provides a new type of high-performance pile foundation material for construction projects, greatly improving the comprehensive utilization value of fluidized mud, and overcoming technical difficulties that have never been successfully solved before. It has significant innovation and breakthrough, will have a far-reaching impact in related fields and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural diagram of a device for preparing composite foundation treatment pile segments by deep modification of waste fluidized sludge provided by an embodiment of the present invention.

[0034] Figure 2 It is a structural diagram of a high-pressure airbag and a permeable geotextile provided in an embodiment of the present invention.

[0035] Figure 3 It is a structural diagram of a sliding disengagement mechanism provided in an embodiment of the present invention.

[0036] In the figure: 1. Rigid frame and electric lifting mechanism; 2. Rigid frame and reaction frame; 3. Motor lifting mechanism; 4. Sliding strip steel plate; 5. Pile forming mechanism; 6. Sliding bearing mechanism; 7. Upper cover; 8. Lower cover; 9. Reinforcement valve; 10. High-pressure airbag; 11. Permeable geotextile; 12. Pulling device; 13. Sliding release mechanism; 14. Mobile pallet. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] like Figure 1 , Figure 3 As shown, the device for preparing composite foundation treatment pile segments by deep modification of waste fluidized sludge provided by the embodiment of the present invention comprises:

[0039] Rigid frame and electric lifting mechanism 1, pile body forming mechanism 5, sliding bearing mechanism 6 and sliding escape mechanism 13, wherein:

[0040] The rigid frame and electric hoisting mechanism 1 comprises a rigid frame and a reaction frame 2 and a motor hoisting mechanism 3, the upper end of the reaction frame is equipped with a motor mechanism 3, a sliding strip steel plate 4 is sleeved on the rigid frame and the reaction frame 1, and the sliding strip steel plate 4 is lifted and lowered by the traction wire rope driven by the motor;

[0041] The device provides stable load-bearing and motion support through a rigid frame and an electric lifting mechanism 1. The rigid frame is the core support structure of the device, ensuring that the device remains stable during operation. The reaction frame 2 is an auxiliary component that provides additional reverse force support for the operation of the equipment, thereby improving the overall reliability of the equipment. The electric lifting mechanism 3 cooperates with the sliding strip steel plate 4 to achieve vertical lifting and lowering of the steel plate by pulling the wire rope, providing precise power control for pile forming and demoulding operations.

[0042] The pile body forming mechanism 5 is used to deeply modify and shape the waste fluid sludge. After the sludge material is fed into the forming cavity, the forming mechanism applies appropriate pressure and restraint force to it to press the sludge into a pile body segment with a predetermined shape and strength. At the same time, the forming mechanism can be combined with necessary modifiers (such as cement, activator, etc.) to further improve the mechanical properties and stability of the pile body through uniform mixing and curing process.

[0043] The sliding bearing mechanism 6 is responsible for bearing the formed pile body segment and moving it from the forming position to the demoulding position along the slide rail. When the sliding strip steel plate 4 slides up and down under the traction of the motor, it drives the bearing mechanism to complete a smooth displacement operation within the rigid frame. The sliding bearing mechanism is designed with guide rails and limit devices to ensure that the pile body remains stable during movement and avoid quality problems caused by vibration or displacement.

[0044] The sliding ejection mechanism 13 cooperates with the sliding bearing mechanism to safely eject the solidified pile body segment from the mold through a mechanical device. During the demoulding process, the ejection mechanism uses precise mechanical control to slowly push the pile body out to avoid damage to the pile body caused by improper operation. After the demoulding is completed, the sliding bearing mechanism will reset the mold to the initial position to prepare for the molding of the next section of the pile body. The whole process is efficient and highly automated, ensuring the stability of the production rhythm and pile body quality.

[0045] The working principle of this device integrates multiple functions of traction, mixing, molding and demoulding, providing reliable technical support for the modification of waste fluid sludge and the efficient production of composite foundation treatment piles.

[0046] like Figure 2 As shown, the pile body forming mechanism 5 comprises a sliding strip steel plate 4, an upper cover 7, a lower cover 8, a reinforcement valve 9, a high-pressure airbag 10 and a water-permeable geotextile 11. The upper cover 7 is bolted to the sliding strip steel plate 4, the upper cover 7 is closed with the lower cover 8, and the high-pressure airbag 10 is placed in the water-permeable geotextile and then placed on the lower cover 8;

[0047] The sliding bearing mechanism 6 is placed on the rigid frame and the electric lifting mechanism base, the upper part is welded and fixed to the lower cover 8, and there are slideways on the left and right sides of the sliding bearing mechanism 6;

[0048] The sliding disengagement mechanism 13 is composed of a moving tray 14 and a pulling device 12. The moving tray is pushed above the lower cover 8 before the pile body is formed. After the pile body is formed, the pile body can be transported, stored or centrally processed.

[0049] The pile body forming mechanism 5 is the core component of the whole device, which is composed of a sliding strip steel plate 4, an upper cover 7, a lower cover 8, a high-pressure airbag 10 and a permeable geotextile 11. The upper cover 7 is firmly connected to the sliding strip steel plate 4 by bolts, and is closed with the lower cover 8 to form a closed forming chamber. During operation, the modified fluidized mud is injected into the forming cavity, and the high-pressure airbag 10 is placed in the permeable geotextile 11, located above the lower cover 8. When the high-pressure airbag is inflated, uniform pressure is applied to the mud, so that the mud is solidified and formed in the closed cavity. At the same time, the permeable geotextile 11 allows excess water to seep out, thereby improving the strength and density of the mud.

[0050] The sliding bearing mechanism 6 is located at the bottom of the rigid frame and the electric lifting mechanism, and is fixed to the lower cover 8 by welding. It is designed with slideways on both sides, which can slide smoothly in the frame structure to ensure that the molding cavity remains stable during the molding and demolding process. The sliding bearing mechanism supports the overall weight of the molding cavity during the molding operation, and allows the molding cavity to move smoothly between different working positions, providing convenience for the subsequent demolding operation.

[0051] The sliding and ejecting mechanism 13 is composed of a moving tray 14 and a pulling device 12. Before the pile body is formed, the moving tray is pushed above the lower cover 8 to receive the formed pile body. When the pile body is cured and formed, the pulling device drives the moving tray mechanically or electrically to slowly push the pile body out of the forming cavity onto the tray. The tray then transports the pile body to a designated location for storage or centralized processing, thereby realizing the integrated operation of demoulding and transportation.

[0052] The entire workflow realizes fully automated operation from fluidized sludge injection, pile body forming to demoulding and transportation through the synergistic effect of the electric lifting mechanism and the sliding strip steel plate 4, combined with the forming mechanism, sliding bearing mechanism and sliding release mechanism. The uniform pressure of the high-pressure airbag and the permeability of the permeable geotextile ensure the strength and stability of the pile body, while the smooth linkage between the slide and the tray ensures production efficiency. The entire system operates efficiently, and the forming and demoulding processes are seamlessly connected, providing reliable support for the mass production of composite foundation treatment piles.

[0053] The device of the present invention is mainly used for the process of preparing composite foundation treatment pile segments by deep modification of waste fluidized sludge. Its working principle starts with the rigid frame and electric hoisting mechanism. The mechanism includes a reaction frame and a motor hoisting mechanism, which drives the traction wire rope through the motor to control the up and down movement of the sliding strip steel plate. This function is a key step in the device's ability to accurately control the pile body forming process, providing support and stability for other parts.

[0054] The main function of the pile forming mechanism is to modify the waste fluid sludge into pile segments. The mechanism includes an upper cover, a lower cover, a reinforcement valve, a high-pressure airbag and a permeable geotextile. When working, the upper cover is connected to the sliding strip steel plate by bolting to form a closed forming cavity. The high-pressure airbag cooperates with the permeable geotextile to ensure that the sludge is evenly filled and gradually formed under pressure. The lower cover serves as the bottom support and cooperates with the upper cover to complete the molding process of the pile.

[0055] The sliding bearing mechanism is mainly used to support and move the pile segments produced during the forming process. At the bottom of the pile forming mechanism, the sliding bearing mechanism is welded and fixed to the lower cover to ensure its stability. The slideways on the left and right sides allow the pile to slide smoothly to the next process. The key role of this mechanism is to provide a smooth sliding track and ensure that the formed pile will not deviate during the processing process, ensuring the forming accuracy and product quality.

[0056] After the pile body is formed, the sliding disengagement mechanism disengages the pile body segment from the forming device through the mobile tray and the pulling device. The mobile tray is pushed above the lower cover, and after the pile body is formed, it is transported to the storage or centralized processing area through the pulling device. This process realizes the rapid transportation of the pile body, and it can be stacked or subsequently processed through reasonable path planning, ensuring the smoothness of the production line.

[0057] When the device for preparing composite foundation treatment pile segments by deep modification of waste fluidized sludge is working, the sliding strip steel plate 4 is bolted to the upper cover 7, and the electric lifting mechanism 3 is started to lift the strip steel plate 4 and the upper cover 7; the high-pressure airbag 10 is inserted into the permeable geotextile 11, and the two are placed together on the lower cover 8, and the end of the high-pressure airbag 10 is bolted to the steel disc of the lower cover 8; the mobile tray is pushed to the top of the lower cover, and the electric lifting mechanism 3 is started to lift the bottom of the upper cover 7 to the lower cover 8 The reinforcing valve 9 is used to reinforce the upper and lower covers; the mud that has been flocculated and solidified is filled into the permeable geotextile 11, and after being filled with mud, a pressure of 0.4MPa is continuously applied to the high-pressure airbag 10; after the specified pressurization time is reached, the high-pressure airbag 10 is depressurized, and after the pressure is released, the reinforcing valve 9 is released, and the electric lifting mechanism 3 is started to lift the upper cover 7; the formed pile body is removed from the pile body forming mechanism by a pulling device, and transported to a designated location for storage or centralized treatment.

[0058] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A device for preparing composite foundation treatment pile segments by deep modification of waste fluidized sludge, characterized in that: The following steps are involved: Rigid frame and electric hoisting mechanism, pile body forming mechanism, sliding bearing mechanism, and sliding release mechanism; the rigid frame and electric hoisting mechanism hoist and fix the upper cover of the pile body forming mechanism to ensure the stability of the entire device during the pile body forming process; The pile body forming mechanism has an inlet connected to the pumping mud pipeline. The flocculation-solidification conditioned mud filled into the permeable geotextile is dehydrated and formed under the pressure of the air bag, and the bottom screen plate can effectively drain water; the sliding bearing mechanism is placed on the rigid frame base of the device, bearing the pile body forming mechanism, and the pile body forming mechanism can be slid out before filling with mud and after the pile body is formed; after the pile body segment is formed, the sliding removal mechanism can smoothly remove the pile body from the pile body forming mechanism and temporarily store or transport it to a centralized area for subsequent processing.

2. The device for preparing composite foundation treatment pile segments by deep modification of waste fluidized sludge as claimed in claim 1, characterized in that: The rigid frame and the electric lifting mechanism have a bearing chassis and a reaction frame, the reaction frame and the bearing chassis are connected by bolts, the bearing chassis includes universal wheels and a water receiving tray, and a welded water outlet port of the water receiving tray is connected to a water hose.

3. The device for preparing composite foundation treatment pile segments by deep modification of waste fluidized sludge as claimed in claim 1, characterized in that: A hoisting motor is arranged at the top of the reaction frame, and the hoisting motor is welded to the middle part of the top of the reaction frame. The motor is wound around a traction wire rope, and a hook is arranged at the end of the wire rope.

4. The device for preparing composite foundation treatment pile segments by deep modification of waste fluidized sludge as claimed in claim 1, characterized in that: The rigid frame reaction frame is sleeved with a balancing steel plate, the middle part of which is provided with a threaded hole, which is bolted with a bolt buckle and can be bolted with the upper cover of the pile body forming mechanism.

5. The device for preparing composite foundation treatment pile segments by deep modification of waste fluidized sludge as claimed in claim 1, characterized in that: The pile body forming mechanism is composed of an airbag extrusion mechanism and a forming cover. The airbag extrusion mechanism and the inner wall of the forming cover have the same size. During the forming process, the airbag extrusion mechanism can be bolted and fixed to the forming cover.

6. The device for preparing composite foundation treatment pile segments by deep modification of waste fluidized sludge as claimed in claim 1, characterized in that: The airbag extrusion mechanism consists of a high-pressure airbag and a permeable geotextile. The front end of the high-pressure airbag is a round steel sheet with a pressure nozzle, the middle part is high-pressure tear-resistant rubber, and the tail end is a sealing round steel sheet. The permeable geotextile is made of polypropylene yarn through sewing, and its structure is a hollow cylinder when the mud mixture is filled.

7. The device for preparing composite foundation treatment pile segments by deep modification of waste fluidized sludge as claimed in claim 1, characterized in that: The molded cover is composed of an upper and lower cover, and the cover is composed of an arc steel plate and a circular steel plate. The circular steel plate is welded to one end of the arc steel plate. The front end of the lower cover is provided with a disc and the middle part of the upper cover is provided with a threaded opening, which can be connected to the electric lifting mechanism.

8. The device for preparing composite foundation treatment pile segments by deep modification of waste fluidized sludge as claimed in claim 1, characterized in that: The sliding bearing mechanism is placed on a rigid frame base, with sliding grooves at both ends, and the upper part is welded and fixed to the lower cover.

9. The device for preparing composite foundation treatment pile segments by deep modification of waste fluidized sludge as claimed in claim 1, characterized in that: The sliding disengagement mechanism is composed of a moving tray and a pulling mechanism. The moving tray is composed of a thin arc-shaped steel plate and an end steel disc. The end of the original plate is provided with a bolt hook. The pulling mechanism is composed of an arc-shaped bearing plate and a hand-cranked pulling mechanism.

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