Manufacturing equipment for air pressure type prefabricated thorn pile
By using cylindrical formwork and concrete filling pipes in the pneumatic prefabricated piercing manufacturing equipment, the gap between the pile center and the surrounding concrete is filled, and the gap problem caused by concrete erosion in the prior art is solved, and a firmer bonding and anchoring effect and higher overall quality are achieved.
Patent Information
- Application Number
- CN202510056681.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2025-04-15
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During the manufacturing process of existing pneumatic prefabricated piercings, the concrete in the center of the pile body is lost during centrifugation, resulting in an increase in the gap between the core tube and the surrounding concrete, affecting the bonding and anchoring effect and overall quality.
The manufacturing equipment is adopted to combine the cylindrical formwork and centrifuge with two upper and lower half-formats. Through the stationary concrete repair pipe and the transition hard pipe rotating with the cylindrical formwork, fine stone concrete is pumped to the periphery of the mandrel in the pile body to fill the gap between the core pipe and the surrounding concrete.
It effectively eliminates the gap between the core tube and the surrounding concrete, improves the bonding and anchoring effect between the core tube and the pile concrete, makes it firm and dense, and ensures the overall quality, bearing capacity and anti-settlement level of the prefabricated pierced piles.
Smart Images
Figure CN119820701A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of pile foundation construction, in particular to a manufacturing device for pneumatic prefabricated thorn piles. Background Art
[0002] In recent years, with the development of economy and the advancement of construction technology, some pile foundation construction schemes with pile side thorns have emerged in the industry to improve the bearing capacity and anti-settlement level of pile foundations.
[0003] The applicant also proposed a technical solution for pneumatic barbed piles in 2022, see patent numbers 2022112109724 and 2022226337026; the pneumatic barbed pile body is provided with an axial center hole and multiple layers of radial holes, the center hole is provided with a core tube and each radial hole is provided with a basic casing, the core tube is sealed and welded with all the basic casings, an outer casing, an inner casing and a barbed root that overlap and fit each other form an external expansion component, and the outer casing of each external expansion component is screwed into a corresponding basic casing. During construction, the pile body is statically pressed into the soil to the bottom elevation, and then the air compressor is started to supply air to the core tube and each external expansion component, so that the barbed roots and inner casing of each external expansion component penetrate into the soil on the side of the pile, and bulge outward to form thorns to increase the resistance of the pile side.
[0004] The technical solution of the above-mentioned pneumatic barbed pile has a series of advantages such as large expansion range, strong force, good effect on pile side resistance gain, convenient construction, no soil dilution, good durability, etc. However, in more than two years of actual production application, it was found that the above-mentioned pneumatic barbed pile still has shortcomings and room for improvement in the production process.
[0005] The process of manufacturing the pneumatic barbed piles in the prior art can be understood as incorporating the process of installing the core tube and the foundation casing into the manufacturing process of the traditional PHC pipe piles. The specific steps are as follows. Each foundation casing is sealed and welded to the core tube to form an integral pipe assembly; a steel cage is tied around the pipe assembly to wrap the pipe assembly in the center; the two ends of each longitudinal main reinforcement of the steel cage are clamped to two chucks, and the two chucks are screwed to the two end plates, and the front end of the core tube is welded to the front chuck; the steel cage and the pipe assembly are placed in the lower half of the formwork, and the front end of the lower half of the formwork is provided with an anchor, which includes a fixed plate, a tensioning plate and a screw; the rear end of the steel cage, i.e., the end plate of the fixed end, clamps the rear mouth of the lower half of the formwork, and the front end of the steel cage, i.e., the end plate of the tensioning end, clamps the rear end of the steel cage Fix it with the anchor tensioning plate; pour concrete, and screw the upper half of the template and the lower half of the template together, and rotate the screw to drive the anchor for tensioning to provide prestress for the main reinforcement of the steel cage; put the pile body and the buckled mold on a centrifuge for rotation and centrifugation, and then perform maintenance. After the concrete is dry and hard, loosen the anchor, remove the upper and lower half of the template, and remove the end plates and bolts at both ends of the pile body; then install each group of external expansion components on the pile body after demoulding, that is, screw the outer sleeve of each group of external expansion components into the corresponding foundation sleeve to complete the manufacture of the pneumatic barbed pile.
[0006] The problem with this manufacturing solution arises during the centrifugal stage. The concrete in the mould is continuously centrifuged outwards and compacted at the outer edge of the pile body near the formwork. However, the concrete in the centre of the pile body is continuously lost during the centrifugal process, causing a gap between the core tube in the centre of the pile body and the surrounding concrete. This gap even becomes larger and larger during the centrifugal process, resulting in poor bonding and anchoring between the core tube and the pile body concrete. The bonding is not firm and is not compact, thus affecting the overall quality and bearing capacity of the pile body. Furthermore, due to the looseness of the core tube and the surrounding areas, the core tube is deformed and damaged under load and loses its air tightness during static pressure and hammering, thus affecting its core function of forming air pressure spikes. Summary of the invention
[0007] The technical problem to be solved by the present invention is to provide a manufacturing device for pneumatic prefabricated thorn piles which can eliminate the gap between the core tube and the surrounding concrete and make the core tube and the pile body concrete bonded and anchored firmly and densely.
[0008] A technical solution of the present invention is to provide a manufacturing equipment for pneumatic prefabricated barbed piles, which includes a cylindrical template and a centrifuge formed by buckling and screwing two upper and lower half-width templates, and the cylindrical template is placed on the centrifuge; the steel cage of the barbed pile body is centrally wrapped with a pipeline assembly, and the pipeline assembly is formed by sealingly connecting a core tube and each foundation sleeve; the two ends of each longitudinal main reinforcement of the steel cage are respectively clamped with the front and rear two chucks, and the front and rear two chucks are respectively screwed with the front and rear end plates, and the front end of the core tube is sealed and connected with the front chuck; an anchor is provided at the front end of the cylindrical template, the steel cage is located in the cylindrical template, the rear end plate of the steel cage clamps the rear mouth of the cylindrical template, and the front end plate of the steel cage is fixed to the anchor tensioning plate; the manufacturing equipment also includes a stationary A concrete-filling pipe and a transition hard pipe rotating with the cylindrical formwork, the outlet of the concrete-filling pipe is connected with the transition hard pipe through a steering sealing joint; the transition hard pipe includes an axial pipe in the front and an elbow pipe in the rear, the radial pipe section of the rear section of the elbow pipe is provided with a screw plate, the upper half of the template side wall protruding forward of the centrifuge is provided with an upwardly convex mounting seat, the mounting seat is penetrated with a radial docking hole, the screw plate is screwed with the mounting seat and the end of the radial pipe section is sealed and plugged with the upper opening of the docking hole, a radial embedded pipe is sealed and plugged with the lower opening of the docking hole, the end of the embedded pipe is against the core pipe and the end of the embedded pipe is provided with a nozzle for filling concrete to the peripheral area of the core pipe on the pipe wall; the rear end plate and the rear chuck are jointly penetrated with a concrete discharge pipe for discharging excess concrete material in the peripheral area of the core shaft.
[0009] Compared with the prior art, the manufacturing equipment using the above structure has the following advantages.
[0010] When the pile body and the cylindrical mold rotate and centrifuge on the centrifuge, the equipment can pump fine stone concrete through the concrete filling pipe, the axial pipe, the elbow pipe and through the upper half template docking hole, and then send the fine stone concrete to the area around the core shaft in the pile body through the embedded pipe, and the fine stone concrete is filled from the front end of the cylindrical mold, diffuses axially backward along the periphery of the core pipe under the pump pressure, reaches the rear end of the cylindrical mold and overflows from the concrete discharge pipe. If the worker observes that there is stable overflow of fine stone concrete from the concrete discharge pipe for more than 2 minutes, it is judged that the concrete filling is successful. The maximum particle size of fine stone concrete does not exceed 15mm, which can fully fill the gap between the pile core pipe and the surrounding concrete; therefore, the equipment solves the disadvantage of the existing technology that the pile body concrete is hollow due to centrifugation, improves the bonding and anchoring effect of the core pipe and the pile body concrete, makes it firm and dense, and thus guarantees the overall quality, bearing capacity and anti-settlement level of the prefabricated barbed pile.
[0011] Moreover, the steering sealing joint makes the front section of the concrete filling pipeline stationary while the rear section rotates synchronously with the mold, thus preventing the concrete filling pipeline from being entangled with the centrifugal mold and causing leakage.
[0012] Furthermore, the design of the elbow pipe just bypasses the anchor at the front end of the cylindrical mold to achieve radial concrete feeding from the side of the mold. This avoids the problem that axial concrete feeding must pass through the anchor at the front end of the mold, the concrete delivery pipe and the anchor's fixed plate, tensioning plate, screw, and the front end plate and front chuck of the mold interfere with each other, making assembly difficult, the structure complex, and even leaking concrete, etc., simplifying the process.
[0013] Moreover, the embedded pipe in the pile body forms a concrete filling channel inside the pile body, which allows the fine stone concrete to reach the core pipe radially. Through pump pressure, the fine stone concrete can overcome the centrifugal force and reach the inside of the pile body smoothly, ensuring the concrete filling effect. After the concrete filling, it is only necessary to remove the elbow pipe and the screw plate, while the internal pipe, i.e. the embedded pipe, is cut off by a gecko and left inside the pile body, making the disassembly process simple and not affecting the strength of the pile body.
[0014] In addition, the structure is easy to assemble. The upper end of the embedded pipe is lightly inserted into the docking hole. When the upper half of the template is lowered, the embedded pipe and the core pipe will be automatically abutted, and the upper end of the embedded pipe will be automatically and firmly connected with the docking hole. When the elbow pipe is screwed to the screw plate and the upper half of the template mounting seat, the end of the radial pipe section of the elbow pipe will be synchronously inserted into the docking hole, thereby realizing the connection between the external pipeline and the internal pipeline of the pile body.
[0015] The concrete filling pipeline in this application is complete and reliably connected, with good sealing and pressure bearing properties, which makes it convenient for workers to increase the concrete filling pump pressure, thereby speeding up the concrete filling speed and improving the concrete filling effect.
[0016] Furthermore, it is only necessary to observe that concrete overflows from the concrete discharge pipe and remains stable for a period of time to determine that the concrete replenishment effect has met the standards. The judgment process is clear, intuitive and easy to see.
[0017] The steering sealing joint is preferably, which includes a stationary shell, an externally threaded joint is arranged at the front end of the shell, and the externally threaded joint is threadedly connected to the concrete filling pipe outlet; the center hole of the externally threaded joint is connected to the shell inner cavity through a conical valve face, a convex ring is arranged at the front end of the axial tube, the axial tube is sleeved with a compression spring and a hexagonal joint, the convex ring and the compression spring are located in the shell inner cavity, the externally threaded tube of the hexagonal joint is screwed with the internal thread of the rear opening of the shell inner cavity, and the externally threaded tube pushes the convex ring forward through the compression spring so that the front end of the axial tube and the conical valve face are abutted and sealed; the joint can continuously provide dynamic compensation for the convex ring and the axial tube, so that the end of the axial tube and the conical valve face are continuously abutted and sealed, thereby realizing the sealed docking of the stationary concrete filling pipe and the rotating transition hard tube, which is firm and reliable and does not leak concrete.
[0018] Preferably, the equipment also includes a triangular bracket, on which two front and rear lower hoops are fixed, each of which is screwed to an upper hoop, the shell of the steering sealing joint is sleeved between the upper and lower hoops on the rear side, and the concrete filling pipe is sleeved between the upper and lower hoops on the front side; in this way, the end of the concrete filling pipe is ensured to be firmly supported and centered at the axial position of the cylindrical template, thereby ensuring that the subsequent transition hard pipe rotates stably with the cylindrical mold and reduces shaking.
[0019] As a further preferred embodiment, an arc-shaped abutment plate is fixed to the inner end of the embedded pipe; in this way, during assembly, the abutment contact area between the embedded pipe and the core pipe will be increased, making the embedded pipe more stable and maintaining the radial direction to ensure the concrete filling effect, and also increasing the upward reaction force of the embedded pipe, making it more firmly plugged and sealed with the docking hole of the upper half of the template. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic structural diagram of the manufacturing equipment of the pneumatic prefabricated barbed piles of the present invention.
[0021] Figure 2 yes Figure 1 Schematic diagram of the structure after deflection at a certain angle.
[0022] Figure 3 The invention is a schematic diagram of the structure of the pneumatic prefabricated barbed pile manufacturing equipment after half-sectioning of the cylindrical formwork, the concrete filling pipe, the steering sealing joint, the transition hard pipe and other structures.
[0023] Figure 4 yes Figure 3 Schematic diagram of the structure after deflection at a certain angle.
[0024] Figure 5 yes Figure 4 Schematic diagram of the structure after deflection at a certain angle.
[0025] Figure 6 yes Figure 4 Enlarged schematic diagram of part A.
[0026] Figure 7This is a schematic diagram after the elbow pipe is removed from the upper half template mounting base.
[0027] Figure 8 It is a partial enlarged schematic diagram after the front end plate is removed from the steel cage (for the convenience of expression, the figure shows the state before the rivet head is pulled back and clamped into the convex hole. After anchoring, the rivet head is flush with the front ring surface of the front chuck).
[0028] Fig. 9 yes Figure 8 Schematic diagram of the structure after deflection at a certain angle.
[0029] As shown in the figure: 1. centrifuge, 2. steel cage, 2.1. main reinforcement, 3. core tube, 3.1. shrink tube, 4. foundation casing, 5. front chuck, 6. rear end plate, 7. front end plate, 8. anchor, 8.1. tension plate, 9. steering sealing joint, 9.1. shell, 9.2. external thread joint, 9.3. conical valve face, 10. concrete filling pipe, 11. axial tube, 11.1. convex ring, 12. elbow pipe, 12.1. Radial pipe section, 13, screw plate, 14, upper half template, 15, mounting seat, 16, docking hole, 17, embedded pipe, 18, arc-shaped abutment plate, 19, nozzle, 20, rear chuck, 21, concrete discharge pipe, 22, compression spring, 23, hexagonal joint, 23.1, external threaded pipe, 24, triangular bracket, 25, lower hoop, 26, upper hoop, 27, front top ring, 28, rear top ring, 29, rivet head, 30, convex hole. DETAILED DESCRIPTION
[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0031] like Figures 1 to 8 As shown, the manufacturing equipment of the pneumatic prefabricated barbed pile of the present invention comprises a cylindrical template formed by screwing and fastening two half-width templates and a centrifuge 1, and the cylindrical template is placed on the centrifuge 1. It is known from common sense that the cylindrical template is longer than the centrifuge 1, so the front and rear ends of the cylindrical template are both protruding from the centrifuge 1.
[0032] The steel cage 2 of the barbed pile body is centrally wrapped with a pipeline assembly, which is formed by a core tube 3 and each layer of basic casing 4 being sealed and connected, such as by screwing or welding. In this embodiment, each layer has four basic casings 4.
[0033] The two ends of each longitudinal main reinforcement 2.1 of the steel cage 2 are respectively clamped with the front and rear chucks, and the front and rear chucks are respectively screwed with the front and rear end plates. Specifically, each end of each main reinforcement 2.1 of the steel cage 2 is provided with a rivet head 29, and each chuck is provided with a convex hole 30 corresponding to the main reinforcement 2.1 one by one, and the convex hole 30 includes a circular hole portion and a bayonet that are interconnected; each end plate is provided with a through hole corresponding to the circular hole portion of the convex hole 30 of the chuck, and a bolt is provided in each through hole; the end of each main reinforcement 2.1 of the steel cage 2 passes through the corresponding circular hole portion of the convex hole 30 and the rivet head 29 at the end of the main reinforcement 2.1 is clamped into the corresponding bayonet; then each bolt of the end plate is screwed into the circular hole portion of the corresponding convex hole 30, so that the connection and fixation of the steel cage 2 with the chucks and end plates on both sides are realized.
[0034] The front end of the core tube 3 is sealed and connected to the front chuck 5, such as by screwing or welding; that is, the shrinking tube 3.1 at the front end of the core tube 3 extends into the center hole of the front chuck 5 and the shrinking tube 3.1 is sealed and screwed or welded to the wall of the center hole, thereby realizing the axial positioning of the core tube 3 in the steel cage 2 and the pile body.
[0035] An anchor 8 is provided at the front end of the cylindrical formwork, the steel cage 2 and the pipeline assembly are both located inside the cylindrical formwork, the rear end plate 6 of the steel cage 2 clamps the rear opening of the cylindrical formwork, and the front end plate 7 of the steel cage 2 is fixed to the anchor 8 tensioning plate 8.1.
[0036] In this embodiment, the radial outer edge of each basic sleeve 4 is against the inner annular surface of the cylindrical template, and the pipe mouth of the basic sleeve 4 can be plugged with a rubber plug to prevent concrete from entering the basic sleeve 4 during pouring. After pouring and demolding, the plug is pulled out, and the pipe mouth of each basic sleeve 4 is exposed on the side of the pile body. The basic sleeve 4 is provided with an internal thread, and the worker can then completely screw the outer sleeve of each external expansion component into the basic sleeve 4. Of course, each basic sleeve 4 can also not have an outer edge to the inner annular surface of the template, but the outer sleeve of the external expansion component is screwed into the corresponding basic sleeve 4 before pouring, which is equivalent to pre-burying the external expansion component in the pile body. It only needs to use a plug to protect the outer mouth of the outer sleeve before pouring to prevent concrete from entering the outer mouth of the outer sleeve during pouring.
[0037] The manufacturing equipment also includes a stationary concrete filling pipe 10 and a transition hard pipe rotating with the cylindrical formwork. It is known from common sense that the concrete filling pipe 10 is provided with a concrete filling pump and the inlet of the concrete filling pipe 10 is connected to the fine stone concrete pool; the outlet of the concrete filling pipe 10 is connected to the transition hard pipe through a steering seal joint 9. The transition hard pipe includes an axial pipe 11 at the front and an elbow pipe 12 at the rear for avoiding the anchor 8. The radial pipe section 12.1 of the rear section of the elbow pipe 12 is provided with a screw plate 13. The side wall of the upper half of the formwork 14 is provided with an upwardly convex mounting seat 15 at the part protruding forward from the centrifuge 1. The mounting seat 15 is penetrated with a radial docking hole 16. The screw plate 13 is screwed to the mounting seat 15 and the end of the radial pipe section 12.1 is sealed and plugged with the upper opening of the docking hole 16. A radial embedded pipe 17 is sealed and inserted at the lower end of the docking hole 16. An arc-shaped abutment plate 18 is fixed to the inner end of the embedded pipe 17. The arc-shaped abutment plate 18 abuts against the core pipe 3, and an axial nozzle 19 for replenishing concrete to the peripheral area of the core pipe 3 is provided on the end wall of the embedded pipe 17. An axial concrete discharge pipe 21 for discharging excess concrete from the peripheral area of the core shaft is passed through the rear end plate 6 and the rear chuck 20. The inlet of the concrete discharge pipe 21 is flush with the front annular surface of the rear chuck 20. The inlet of the concrete discharge pipe 21 is located in the peripheral area of the core pipe 3, and the radial distance between the inlet of the concrete discharge pipe 21 and the core pipe 3 does not exceed 15 mm.
[0038] The steering sealing joint 9 of the present application is preferably, which includes a stationary shell 9.1, a front end of the shell 9.1 is provided with an external threaded joint 9.2, and the external threaded joint 9.2 is screwed to the outlet of the concrete filling pipe 10; the center hole of the external threaded joint 9.2 is connected to the inner cavity of the shell 9.1 through the conical valve surface 9.3, a convex ring 11.1 is provided at the front end of the axial tube 11, and the axial tube 11 is sleeved with a compression spring 22 and a hexagonal joint 23, the convex ring 11.1 and the compression spring 22 are located in the inner cavity of the shell 9.1, the external threaded tube 23.1 of the hexagonal joint 23 is screwed with the internal thread of the rear port of the inner cavity of the shell 9.1, and the external threaded tube 23.1 pushes the convex ring 11.1 forward through the compression spring 22 so that the front end of the axial tube 11 and the conical valve surface 9.3 are abutted and sealed. More specifically, the front and rear ends of the compression spring 22 are respectively fixed with a front top ring 27 and a rear top ring 28, and the two top rings are also fitted on the axial tube 11, and the external threaded tube 23.1, the front top ring 27, the compression spring 22, the rear top ring 28, the convex ring 11.1 and the conical valve surface 9.3 are abutted in sequence.
[0039] The manufacturing equipment also includes a triangular bracket 24, on which two front and rear lower hoops 25 are fixed, each of which is screwed to an upper hoop 26, the housing 9.1 of the steering sealing joint 9 is sleeved between the upper and lower hoops on the rear side, and the concrete filling pipe 10 is sleeved between the upper and lower hoops on the front side.
Claims
1. A manufacturing device for pneumatic prefabricated barbed piles, comprising a cylindrical template and a centrifuge formed by screwing and fastening two half-width templates, the cylindrical template being placed on the centrifuge; a steel cage of the barbed pile body is centrally wrapped with a pipe assembly, the pipe assembly is formed by sealingly connecting a core tube and each basic casing; both ends of each longitudinal main rib of the steel cage are respectively clamped with two front and rear chucks, and the two front and rear chucks are respectively screwed with two front and rear end plates, and the front end of the core tube is sealed and connected with the front chuck; an anchor is provided at the front end of the cylindrical template, the steel cage is located in the cylindrical template, the rear end plate of the steel cage clamps the rear mouth of the cylindrical template, and the front end plate of the steel cage is fixed to the anchor tensioning plate; the characteristics are: The manufacturing equipment also includes a stationary concrete-filling pipe and a transition hard pipe that rotates with the cylindrical formwork, the outlet of the concrete-filling pipe is connected to the transition hard pipe via a steering sealing joint; the transition hard pipe includes a front axial pipe and a rear elbow pipe, the radial pipe section of the rear section of the elbow pipe is provided with a screw plate, the upper half of the template side wall protrudes forward of the centrifuge and is provided with an upwardly convex mounting seat, the mounting seat is penetrated with a radial docking hole, the screw plate is screwed with the mounting seat and the end of the radial pipe section is sealed and plugged with the upper opening of the docking hole, a radial embedded pipe is sealed and plugged with the lower opening of the docking hole, the end of the embedded pipe is in contact with the core pipe and the end of the embedded pipe is provided with a nozzle for filling concrete to the peripheral area of the core pipe on the pipe wall; the rear end plate and the rear chuck are jointly penetrated by a concrete discharge pipe for discharging excess concrete material in the peripheral area of the core shaft.
2. The manufacturing equipment of pneumatic prefabricated barbed piles according to claim 1 is characterized in that: The steering sealing joint includes a stationary shell, an external threaded joint is arranged at the front end of the shell, and the external threaded joint is threadedly connected to the concrete filling pipe outlet; the center hole of the external threaded joint is connected with the shell inner cavity through a conical valve surface, a convex ring is arranged at the front end of the axial tube, and the axial tube is sleeved with a compression spring and a hexagonal joint, the convex ring and the compression spring are located in the shell inner cavity, the external threaded tube of the hexagonal joint is screwed with the internal thread of the rear port of the shell inner cavity, and the external threaded tube pushes the convex ring forward through the compression spring so that the front end of the axial tube and the conical valve surface are abutted and sealed.
3. The manufacturing equipment of pneumatic prefabricated barbed piles according to claim 2 is characterized in that: It also includes a triangular bracket, on which two front and rear lower hoops are fixed, each lower hoops is screwed to an upper hoops, the shell of the steering seal joint is sleeved between the upper and lower hoops on the rear side, and the concrete filling pipe is sleeved between the upper and lower hoops on the front side.
4. The manufacturing equipment of pneumatic prefabricated barbed piles according to claim 1, characterized in that: An arc-shaped abutment plate is fixed to the inner end of the embedded pipe.