A fully assembled self-disassembling concrete hollow pile inner mold device and its use method

Abstract

The present invention discloses a fully assembled self-disassembling concrete hollow pile inner mold device and a method for using the same. The steel cage fixing plate assembly is longitudinally fixed to the inner steel bars of the pile body steel cage skeleton through a hollow hinge ring and a bent bolt, the guide rail connection assembly is connected from top to bottom through a mortise and tenon rib on the steel cage fixing plate assembly, and the tile assembly is connected from top to bottom through a U-shaped slide groove at the left and right ends along the guide rail tenon on the guide rail connection assembly; several groups of tile assemblies and guide rail connection assemblies are combined to form a circular ring, and the pile body concrete is poured to form the pile body; finally, the guide rail connection assembly and tile assembly are pulled up and recovered in sequence. The segment assembly is light in weight when hoisted, and there is no need to call for heavy hoisting equipment; no other measures are required for assembly and disassembly between all components; there is no need to consider the friction between the discrete segment components and the inner wall of the formed pile body, and easy demoulding can be achieved, which is convenient for recycling, saves resources, and saves costs.

Description

Technical field:

[0001] The present invention relates to civil engineering fields such as bridge engineering and construction engineering, and in particular to a fully assembled self-disassembling concrete hollow pile inner mold device and a use method thereof. Background technology:

[0002] In existing engineering technology, due to the limitations of internal formwork technology, it is difficult to make breakthroughs in large-diameter hollow pile foundation technology. The traditional integral steel internal formwork has the following problems: First, the overall weight is large, requiring a large-tonnage crane, especially for large-diameter concrete hollow pile foundations with long pile lengths. The overall lifting is extremely difficult, and it is easy to cause excessive plane deviation, making the protective layer inside the hollow pile foundation fail to meet the quality requirements; second, the steel formwork is difficult to demold and recycle. After the pile (column) is poured, the steel formwork is difficult to remove along the axis of the pile (column) body because the full circumference cross-section of the steel formwork is in contact with the inner wall of the pile (column) concrete. From the above reasons, it can be seen that the use of integral steel formwork will greatly increase the difficulty of construction, and the difficulty in recyclable integral steel formwork causes the project cost to be too high. Summary of the invention:

[0003] To address the shortcomings of existing technologies, the present invention provides a fully assembled, self-disassembling inner formwork device for hollow concrete piles and its use method. The inner formwork device features lightweight segments, precise and convenient lowering and docking, and rapid segment recovery, resulting in high utilization efficiency. This solves the technical challenges of large-diameter hollow concrete piles (columns) in their development and engineering application.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0005] A fully assembled self-disassembling concrete hollow pile inner form device, comprising:

[0006] A tile assembly, comprising a curved steel panel, with U-shaped chutes provided at both left and right ends of the curved steel panel, the U-shaped chutes opening outward;

[0007] A guide rail connection assembly connects two adjacent tile assemblies on the left and right. Specifically, the guide rail connection assembly includes a guide rail, which is a three-chamber hollow box-shaped component. The outer edges of the hollow box chambers on both sides of the guide rail are provided with guide rail tenons that connect with the flanges of the U-shaped slide.

[0008] Several groups of tile assemblies and guide rail connection assemblies are combined to form a circular ring, which provides radial support for the pile concrete when the pile body is poured, and acts as an inner formwork.

[0009] The invention also includes a steel cage fixing plate assembly, which is connected to the guide rail connection assembly. Specifically, the steel cage fixing plate assembly includes a plate, and the inner side surface of the plate facing away from the steel cage frame is provided with two tenon ribs along the longitudinal length of the plate, which are connected to two mortise and tenon ribs provided along the longitudinal length of one side of the guide rail connection assembly.

[0010] A circular ring formed by a plurality of tile assemblies and guide rail connection assemblies is fixedly connected to the inner layer of steel bars of the concrete hollow pile steel cage through a steel cage fixing plug-in assembly.

[0011] Further technology of the present invention:

[0012] Preferably, the inner wall of the curved steel panel is provided with panel transverse ribs and panel longitudinal ribs to form a stiffening structure. The panel transverse ribs are arranged in multiple rows along the axial direction of the curved steel panel and are welded into a whole with the curved steel panel and the U-shaped slide grooves at both ends. The top panel transverse ribs are arranged at a position slightly lower than the curved steel panel and the upper end surface of the U-shaped slide groove, and the bottom panel transverse ribs are arranged at a position slightly higher than the curved steel panel and the lower end surface of the U-shaped slide groove.

[0013] Preferably, rubber strips are provided at the bases where the top and bottom panel transverse ribs connect to the curved steel panels. When the top rubber strip is naturally expanded, its edge slightly protrudes above the upper end of the curved steel panel, while the bottom rubber strip is naturally expanded, its edge slightly protrudes above the lower end of the curved steel panel. When the upper and lower adjacent tile assemblies are butted together, the rubber strip located at the bottom transverse rib of the upper tile assembly and the rubber strip located at the top transverse rib of the lower tile assembly squeeze each other, sealing the connection between the upper and lower curved steel panels and preventing leakage during the pouring of the concrete hollow pile body.

[0014] Preferably, the top panel transverse rib and the second-to-last panel transverse rib at the bottom are both provided with hanging rope anchor holes, and on the axial projection plane of the tile assembly, the bottommost panel transverse rib does not block the hanging rope anchor hole on the second-to-last panel transverse rib at the bottom. When the tile assembly is vertically lowered or recovered by the hanging rope, one end of the hanging rope is anchored in the hanging rope anchor hole provided in the top panel transverse rib of the lower tile assembly, and the other end of the hanging rope is anchored in the hanging rope anchor hole provided in the second-to-last panel transverse rib at the bottom of the upper tile assembly, ensuring that the hanging ropes between adjacent tile assemblies and the bottommost panel transverse rib in the upper tile assembly will not collide or "fight".

[0015] Preferably, a polytetrafluoroethylene slide plate is provided at the contact portion between the U-shaped slide groove of the tile assembly and the guide rail connecting assembly along the longitudinal length of the U-shaped slide groove to facilitate mutual sliding between the tile assembly and the guide rail connecting assembly.

[0016] Preferably, a lifting rope anchoring ring is provided on the inner wall of the hollow box chamber in the middle of the guide rail near the upper and lower ends, and a middle transverse partition is provided in the hollow box chamber in the middle of the guide rail to separate the upper and lower lifting rope anchoring rings.

[0017] Preferably, a guide rail tenon extends from the hollow box chamber at one end of the guide rail, and when adjacent guide rail connection components are docked up and down, the guide rail tenon of the upper guide rail is socketed with the edge hollow box chamber of the lower guide rail.

[0018] Preferably, two mortise holes arranged longitudinally on one side of the guide rail connection assembly contact the tenon ribs of the steel cage fixing plate assembly, and a polytetrafluoroethylene slide plate is arranged along the longitudinal length of the mortise holes to facilitate mutual sliding between the guide rail connection assembly and the steel cage fixing plate assembly.

[0019] Preferably, a plurality of hollow hinge rings are evenly arranged along the longitudinal direction of the insert plate on the outer side surface facing the steel cage frame surface, and the hollow hinge rings are fixedly connected to the inner layer of steel bars of the concrete hollow pile steel cage through bent anchor bolts.

[0020] The present invention also provides a method for using a fully assembled self-disassembling concrete hollow pile inner mold device, which is characterized by comprising the following steps:

[0021] Step 1: Make the pile body steel cage skeleton. The steel cage fixing plate assembly is longitudinally fixed to the inner side of the pile body inner ring steel cage skeleton through the hollow hinge ring and the bent anchor bolt. According to the design, multiple steel cage fixing plate assemblies are evenly arranged along the circumference of the inner diameter of the pile body. It is necessary to use the layout method and temporary stiffening round steel hoops to ensure the longitudinal straightness of the steel cage fixing plate assembly and ensure that multiple steel cage fixing plate assemblies are arranged on the same circumference.

[0022] Step 2: After the steel cage fixing plug-in plate assembly is fixed to the pile body steel cage frame, the corresponding guide rail connection assembly is installed. The guide rail connection assembly is inserted from top to bottom through the mortise and tenon ribs of the steel cage fixing plug-in plate assembly to complete the assembly. As needed, the guide rail connection assembly can be made into a segmented type. In this case, the bottom guide rail does not need to be provided with a guide rail convex tenon. The upper and lower adjacent segments need to be connected by a lifting rope. One end of the lifting rope is anchored in the lifting rope anchor ring at the upper end position of the lower guide rail segment, and the other end is anchored in the lifting rope anchor ring at the lower end position of the adjacent upper guide rail segment. After the two guide rail segments are connected, the lifting rope hangs down and curls up in the hollow box chamber in the middle of the guide rail. The upper and lower curled lifting ropes are separated by the middle horizontal partition provided in the hollow box chamber in the middle of the guide rail.

[0023] Step 3: After the steel cage fixing plate assembly and the guide rail connection assembly are fully docked and assembled, the tile assembly is assembled and the steel cage frame is lowered as a whole;

[0024] Step 4: After the steel cage skeleton is lowered into place, lower the tile assembly in sections. When lowering, the U-shaped slides on the left and right ends of the tile assembly slide down along the guide rail tenons from top to bottom. The two adjacent tile assemblies above and below need to be connected by a lifting rope. One end of the lifting rope is anchored in the lifting rope anchor hole set in the top panel cross rib of the lower tile assembly, and the other end of the lifting rope is anchored in the lifting rope anchor hole set in the second-to-last panel cross rib of the adjacent upper tile assembly. After the two adjacent tile assemblies above and below are docked and closed, the lifting rope is hung down and curled up inside the tile assembly.

[0025] Step 5: After all tile assemblies and guide rail connection assemblies are docked and inserted, they are enclosed into a closed circle and the pile body concrete is poured;

[0026] Step 6: After the pile concrete reaches the design strength, use the lifting rope to lift out the guide rail connection assembly section by section to complete the recovery of the guide rail connection assembly;

[0027] Step 7: After all the guide rail connection assemblies on the same floor are hoisted out, the tile assembly is in a "collapsed" discrete state, and the tile assembly is hoisted out section by section using a hoisting rope to complete the recycling of the tile assembly;

[0028] Step 8: Concrete hollow pile foundation is formed.

[0029] Beneficial effects

[0030] A fully self-assembling, self-disassembling inner formwork device for hollow concrete piles and its use method have been creatively invented. The device consists of multiple segmented components connected in series longitudinally and in parallel transversely. The joints between the segmented components are all mortise and tenon joints, and all components are self-assembling and self-disassembling, eliminating the need for bolting, welding, or other additional measures.

[0031] After the pile (column) body is cast, the inner mold device self-disintegrates to form a discrete segment component with multiple degrees of freedom. The suspension ropes anchored on the segment component can freely exert force at multiple angles without considering the friction resistance between the discrete segment component and the inner wall of the formed hollow pile (column), thereby making the discrete segment component easy to demould.

[0032] A fully assembled self-disassembling concrete hollow pile inner formwork device is simple to manufacture, easy to transport and install, and can greatly reduce the difficulty of on-site construction; the segment components are lightweight when hoisted, and no heavy lifting equipment is required; it is easy to recycle and large-diameter concrete hollow piles (columns) with the same inner diameter can be reused, saving resources, saving construction costs, and reducing the total carbon emissions of construction projects.

[0033] The invention of a fully assembled self-disassembling concrete hollow pile inner mold device and a method of use has a great promoting effect on the development and engineering application of large-diameter concrete hollow pile (column) technology. Description of the drawings:

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive efforts.

[0035] Figure 1 This is a schematic elevation diagram of a fully assembled self-disassembling concrete hollow pile inner formwork device;

[0036] Figure 2 This is a partial plan view of a fully assembled self-disassembling concrete hollow pile inner formwork device;

[0037] Figure 3 This is a schematic diagram of the tile component elevation;

[0038] Figure 4 It is a planar schematic diagram of two adjacent tile assemblies;

[0039] Figure 5 This is a schematic elevation diagram of the guide rail connection assembly;

[0040] Figure 6 It is a plan view of the guide rail connection assembly;

[0041] Figure 7 This is a schematic elevation diagram of the steel cage fixing plate assembly;

[0042] Figure 8 This is a schematic diagram of the assembly of the guide rail connection assembly and the steel cage fixing plate assembly;

[0043] Figure 9 This is a schematic diagram of the assembly of the tile assembly and the guide rail connection assembly;

[0044] Figure 10 This is a schematic diagram of the partial assembly of upper and lower adjacent tile assemblies;

[0045] Figure 11 Schematic diagram of the assembly of upper and lower adjacent tile components;

[0046] Figure 12 This is a schematic diagram of the assembly of upper and lower adjacent guide rail connection components;

[0047] In the figure, 1-tile assembly, 1a-arc-shaped steel panel, 1b-panel transverse rib, 1c-panel longitudinal rib, 1d-rubber strip, 1e-U-shaped slide, 1f-hanging rope anchor hole, 2-guide rail connection assembly, 2a-guide rail, 2b-guide rail tenon, 2c-guide rail mortise, 2d-guide rail tenon, 2e-hanging rope anchor ring, 2f-middle transverse partition, 3-rebar cage fixing plug-in plate assembly, 3a-plug-in plate, 3b-plug-in plate tenon rib, 3c-hollow hinge ring, 3d-curved anchor bolt, 4-PTFE slide plate.

[0048] Specific implementation structure:

[0049] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Example:

[0050] A fully assembled self-disassembling concrete hollow pile inner form device and a use method thereof are composed of a tile assembly 1, a guide rail connection assembly 2 and a steel cage fixing plug-in assembly 3.

[0051] The tile assembly 1 is a segmented standardized component, including a curved steel panel 1a, panel transverse ribs 1b, panel longitudinal ribs 1c, rubber strips 1d, U-shaped slide grooves 1e, hanging rope anchor holes 1f and a polytetrafluoroethylene slide plate 4.

[0052] The panel transverse ribs 1b and panel longitudinal ribs 1c are stiffening structures for the curved steel panel 1a, ensuring that the tile assembly 1 has a certain degree of rigidity and strength. The panel transverse ribs 1b are arranged in multiple rows along the longitudinal direction of the curved steel panel 1a and are welded to the curved steel panel 1a and the U-shaped chutes 1e at the left and right ends to form a whole. The top panel transverse ribs 1b are arranged slightly lower than the upper end surfaces of the curved steel panel 1a and the U-shaped chutes 1e. The rubber strips 1d are fixedly arranged at the top surface of the root where the top panel transverse ribs 1b connect to the curved steel panel 1a. In the naturally expanded state, the edge of the rubber strips 1d is slightly higher than the upper end surface of the curved steel panel 1a. The bottom panel transverse ribs 1b are arranged slightly higher than the lower end surface of the curved steel panel 1a and the U-shaped chutes 1e. The rubber strips 1d are fixedly arranged at the bottom surface where the bottom panel transverse ribs 1b connect to the curved steel panel 1a. In the naturally expanded state, the edge of the rubber strips 1d is slightly higher than the lower end surface of the curved steel panel 1a.

[0053] Furthermore, when adjacent tile assemblies 1 are butted together, the rubber strip 1d located at the bottom panel transverse rib 1b of the upper tile assembly and the rubber strip 1d located at the top panel transverse rib 1b of the lower tile assembly squeeze each other, so that the butt joint of the upper and lower arc-shaped steel panels 1a is in a sealed state to prevent leakage during the pouring of the concrete hollow pile (column) body.

[0054] Furthermore, both the top panel transverse rib 1b and the penultimate bottom panel transverse rib 1b are provided with rope anchor holes 1f. Adjacent tile assemblies 1 are connected vertically by ropes, one end of which is anchored in a rope anchor hole 1f provided in the top panel transverse rib of the lower tile assembly, and the other end of which is anchored in a rope anchor hole 1f provided in the penultimate bottom panel transverse rib of the upper tile assembly. The rope length is designed based on the height of the hollow pile.

[0055] Furthermore, in the axial projection plane of the tile assembly 1, the bottommost panel transverse rib 1b does not obstruct the rope anchoring hole 1f on the penultimate panel transverse rib 1b. This prevents the ropes between adjacent tile assemblies from colliding with the bottommost panel transverse rib 1b of the upper tile assembly when the tile assembly 1 is vertically lowered or retrieved.

[0056] The U-shaped chute 1e is provided at two edges of the curved steel panel 1a, with the opening of the U-shaped chute 1e facing outward. A polytetrafluoroethylene slide plate 4 is provided along the entire longitudinal length of the U-shaped chute 1e where the U-shaped chute 1e contacts the guide rail connection assembly 2, facilitating the sliding movement between the tile assembly 1 and the guide rail connection assembly 2.

[0057] Furthermore, several groups of tile assemblies 1 and guide rail connection assemblies 2 are combined to form a circular ring, which provides radial support for the concrete of the hollow concrete pile body when the pile body is cast.

[0058] The guide rail connection assembly 2 is a segmented standardized component, including a guide rail 2a, a guide rail tenon 2b, a guide rail mortise 2c, a guide rail tenon 2d, a suspension rope anchor ring 2e and a polytetrafluoroethylene slide plate 4.

[0059] The guide rail 2a is a three-chamber hollow box-type component. The outer edge of the guide rail 2a has a reserved tenon 2b that connects with the flange of the U-shaped slide groove 1e in the tile assembly 1, and the side of the guide rail 2a has a reserved mortise 2c that connects with the insert plate tenon rib 3b in the steel cage fixed insert plate assembly 3.

[0060] Furthermore, a tenon 2d extends from the edge hollow box chamber of the guide rail 2a at one end of the guide rail. When adjacent guide rail connecting components 2 are connected up and down, the tenon 2d of the upper guide rail is connected to the edge hollow box chamber of the lower guide rail by socket.

[0061] Furthermore, rope anchor rings 2e are provided on the inner wall of the hollow chamber in the middle of the guide rail 2a, near the upper and lower ends. A central transverse partition 2f is provided in the hollow chamber in the middle of the guide rail 2a to separate the upper and lower rope anchor rings 2e. Upper and lower adjacent guide rail connection assemblies 2 are connected to each other via ropes, one end of which is anchored in the rope anchor ring 2e at the top of the lower guide rail, and the other end is anchored in the rope anchor ring 2e at the bottom of the upper guide rail. The rope length is designed based on the height of the hollow pile. After the adjacent guide rail connection assemblies 2 are docked, the ropes hang down and curl up in the hollow chamber in the middle of the guide rail 2a.

[0062] Furthermore, the guide rail mortise 2c is provided with a polytetrafluoroethylene slide plate 4 along the entire longitudinal length of the guide rail 2a, which facilitates the mutual sliding between the guide rail connecting component 2 and the steel cage fixing plate component 3.

[0063] Furthermore, the bottom section of the guide rail connection assembly 2 is not provided with a guide rail tenon 2d.

[0064] The reinforcement cage fixing plate assembly 3 is an integral component, comprising a plate 3a, a plate tenon rib 3b, a hollow hinge ring 3c, a bent anchor bolt 3d and a polytetrafluoroethylene slide plate 4.

[0065] A plurality of hollow hinges 3c are evenly arranged on the outer side surface of the insert plate 3a (facing the steel cage frame) at a certain distance along the longitudinal direction of the insert plate. The hollow hinges 3c are fixedly connected to the inner layer of steel bars of the concrete hollow pile steel cage through bent anchor bolts 3d.

[0066] When implementing, you can follow the steps below:

[0067] Step 1: Make the reinforcement cage skeleton of the pile body. The reinforcement cage fixing plate assembly 3 is longitudinally fixed to the inner side of the reinforcement cage skeleton of the inner circle of the pile body through the hollow hinge ring 3c and the bent anchor bolt 3d. According to the design, multiple reinforcement cage fixing plate assemblies 3 are evenly arranged along the circumference of the inner diameter of the pile body. It is necessary to use the layout method and temporary stiffening round steel hoops to ensure the longitudinal straightness of the reinforcement cage fixing plate assembly and ensure that multiple reinforcement cage fixing plate assemblies 3 are arranged on the same circumference.

[0068] Step 2: After the steel cage fixing plug-in plate assembly 3 is fixed to the pile body steel cage frame, the corresponding guide rail connection assembly 2 is installed. The guide rail connection assembly 2 is connected and inserted from top to bottom with the plug-in plate tenon rib 3b of the steel cage fixing plug-in plate assembly through the mortise 2c to complete the assembly. As needed, the guide rail connection assembly 2 can be made into a segmented type. In this case, the bottom guide rail 2a does not need to be provided with a guide rail convex tenon 2d. The upper and lower adjacent segments need to be connected by a suspension rope. One end of the suspension rope is anchored in the suspension rope anchor ring 2e at the upper end position of the lower guide rail segment, and the other end is anchored in the suspension rope anchor ring 2e at the lower end position of the adjacent upper guide rail segment. After the two guide rail segments are connected, the suspension rope hangs down and curls up in the middle hollow box chamber of the guide rail 2a. The upper and lower curled suspension ropes are separated by the middle horizontal partition 2f provided in the middle hollow box chamber of the guide rail 2a.

[0069] Step 3: After the steel cage fixing plate assembly 3 and the guide rail connection assembly 2 are fully docked and assembled, the tile assembly 1 is assembled and the steel cage frame is lowered as a whole;

[0070] Step 4: After the steel cage skeleton is lowered into place, lower the tile assembly 1 in sections. When lowering, the U-shaped chutes 1e at the left and right ends of the tile assembly 1 slide down along the guide rail tenons 2b from top to bottom. The two adjacent tile assemblies 1 above and below need to be connected in pairs by a lifting rope. One end of the lifting rope is anchored in the lifting rope anchor hole 1f set in the top panel cross rib of the lower tile assembly, and the other end of the lifting rope is anchored in the lifting rope anchor hole 1f set in the second-to-last panel cross rib of the adjacent upper tile assembly. After the two adjacent tile assemblies 1 above and below are docked and closed, the lifting rope is drooped and curled up inside the tile assembly.

[0071] Step 5: After all tile assemblies 1 and guide rail connection assemblies 2 are docked and inserted, they are enclosed into a closed circle and the pile body concrete is poured;

[0072] Step 6: After the pile concrete reaches the design strength, the guide rail connection assembly 2 is hoisted out section by section using a hoisting rope to complete the recovery of the guide rail connection assembly 2;

[0073] Step 7: After all the guide rail connection assemblies 2 on the same layer are hoisted out, the tile assembly is in a "collapsed" discrete state, and the tile assembly 1 is hoisted out section by section using a hoisting rope to complete the recycling of the tile assembly 1;

[0074] Step 8: Concrete hollow pile foundation is formed.

[0075] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A fully assembled self-disassembling concrete hollow pile inner mold device, characterized in that: include: A tile assembly, comprising a curved steel panel, with U-shaped chutes provided at both left and right ends of the curved steel panel, the U-shaped chutes opening outward; The guide rail connection assembly connects two adjacent tile assemblies on the left and right. The guide rail connection assembly includes a guide rail, which is a three-chamber hollow box-shaped component. The outer edges of the hollow box chambers on both sides of the guide rail are provided with guide rail tenons that connect with the flanges of the U-shaped slide. The guide rail edge hollow box chamber extends out of the guide rail tenon at one end of the guide rail. When the adjacent guide rail connection components are connected up and down, the guide rail tenon of the upper guide rail is connected to the edge hollow box chamber of the lower guide rail by socket. Several groups of tile assemblies and guide rail connection assemblies are combined to form a ring, which provides radial support for the pile concrete during the pouring of the pile body and acts as an inner formwork; Also included is a steel cage fixing plug-in assembly, the steel cage fixing plug-in assembly including a plug-in plate, the inner side surface of the plug-in plate facing away from the steel cage frame surface is provided with two tenon ribs along the longitudinal length of the plug-in plate and is connected to two mortise and tenon ribs provided along the longitudinal length of one side of the guide rail connection assembly; A circular ring formed by a plurality of tile assemblies and guide rail connection assemblies is fixedly connected to the inner layer of steel bars of the concrete hollow pile steel cage through a steel cage fixing plug-in assembly.

2. The self-disassembling hollow concrete pile inner mold device according to claim 1, characterized in that: The inner wall of the curved steel panel is provided with panel transverse ribs and panel longitudinal ribs to form a stiffening structure. The panel transverse ribs are arranged in multiple rows along the axial direction of the curved steel panel and are welded into a whole with the curved steel panel and the U-shaped slide grooves at both ends. The top panel transverse ribs are arranged slightly lower than the curved steel panel and the upper end surface of the U-shaped slide groove, and the bottom panel transverse ribs are arranged slightly higher than the curved steel panel and the lower end surface of the U-shaped slide groove.

3. The self-disassembling hollow concrete pile inner mold device according to claim 2, characterized in that: Rubber strips are provided at the roots of the top and bottom panel cross ribs and the curved steel panels. When the rubber strip provided at the top is naturally expanded, its edge is slightly higher than the upper end surface of the curved steel panel. When the rubber strip provided at the bottom is naturally expanded, its edge is slightly higher than the lower end surface of the curved steel panel.

4. The self-disassembling hollow concrete pile inner mold device according to claim 2, characterized in that: The top panel transverse rib and the second-to-last panel transverse rib at the bottom are both provided with rope anchoring holes. On the axial projection plane of the tile assembly, the bottommost panel transverse rib does not block the rope anchoring holes on the second-to-last panel transverse rib at the bottom.

5. The fully assembled self-disassembling concrete hollow pile inner mold device according to claim 1, characterized in that: A polytetrafluoroethylene slide plate is provided along the longitudinal length of the U-shaped slide groove at the contact portion between the U-shaped slide groove of the tile assembly and the guide rail connection assembly.

6. The fully assembled self-disassembling concrete hollow pile inner mold device according to claim 1, characterized in that: A lifting rope anchoring ring is arranged near the upper and lower ends of the inner wall of the hollow box chamber in the middle of the guide rail, and a middle transverse partition is arranged in the hollow box chamber in the middle of the guide rail to separate the upper and lower lifting rope anchoring rings.

7. The fully assembled self-disassembling concrete hollow pile inner mold device according to claim 1, characterized in that: Two longitudinal mortises arranged on one side of the guide rail connecting component are provided with a polytetrafluoroethylene sliding plate along the longitudinal length of the mortises at the contact position with the tenon ribs of the steel cage fixing plug-in plate component.

8. The fully assembled self-disassembling concrete hollow pile inner formwork device according to claim 1, characterized in that: A plurality of hollow hinge rings are evenly arranged along the longitudinal direction of the insert plate on the outer side surface facing the steel cage frame surface. The hollow hinge rings are fixedly connected to the inner layer of steel bars of the concrete hollow pile steel cage through bent anchor bolts.

9. A method for using the fully assembled self-disassembling concrete hollow pile inner formwork device as claimed in claim 1, characterized in that: The following steps are involved: Step 1: Make the pile body steel cage skeleton. The steel cage fixing plate assembly is longitudinally fixed to the inner side of the pile body inner ring steel cage skeleton through the hollow hinge ring and the bent anchor bolt. According to the design, multiple steel cage fixing plate assemblies are evenly arranged along the circumference of the inner diameter of the pile body. It is necessary to use the layout method and temporary stiffening round steel hoops to ensure the longitudinal straightness of the steel cage fixing plate assembly and ensure that multiple steel cage fixing plate assemblies are arranged on the same circumference. Step 2: After the steel cage fixing plug-in plate assembly is fixed to the pile body steel cage frame, the corresponding guide rail connecting assembly is installed, and the guide rail connecting assembly is butted up and down with the plug-in plate tenon rib of the steel cage fixing plug-in plate assembly through the mortise to complete the assembly; according to needs, the guide rail connecting assembly can be made into a segmented type. In this case, the bottom guide rail does not need to be provided with a guide rail convex tenon, and the upper and lower adjacent segments need to be connected by a lifting rope. One end of the lifting rope is anchored in the lifting rope anchoring ring at the upper end position of the lower guide rail segment, and the other end is anchored in the lifting rope anchoring ring at the lower end position of the adjacent upper guide rail segment; after the two guide rail segments are butted together, the lifting rope is hung down and curled up in the hollow box chamber in the middle of the guide rail, and the upper and lower curled lifting ropes are separated by the middle horizontal partition provided in the hollow box chamber in the middle of the guide rail; Step 3: After the steel cage fixing plate assembly and the guide rail connection assembly are fully docked and assembled, the tile assembly is assembled and the steel cage frame is lowered as a whole; Step 4: After the steel cage skeleton is lowered into place, the tile assembly is lowered in sections. When lowering, the U-shaped slides at the left and right ends of the tile assembly slide down from top to bottom along the guide rail tenons; the two adjacent tile assemblies above and below need to be connected in pairs by hanging ropes, one end of the hanging rope is anchored in the hanging rope anchor hole provided in the top panel cross rib of the lower tile assembly, and the other end of the hanging rope is anchored in the hanging rope anchor hole provided in the second-to-last panel cross rib of the adjacent upper tile assembly; after the two adjacent tile assemblies above and below are docked and closed, the hanging rope is hung down and curled up inside the tile assembly; Step 5: After all tile assemblies and guide rail connection assemblies are docked and inserted, they are enclosed into a closed circle and the pile body concrete is poured; Step 6: After the pile concrete reaches the design strength, use the lifting rope to lift out the guide rail connection assembly section by section to complete the recovery of the guide rail connection assembly; Step 7: After all the guide rail connection components on the same floor are hoisted out, the tile components are in a "collapsed" discrete state. The tile components are hoisted out section by section using the hoisting rope to complete the recycling of the tile components. Step 8: Concrete hollow pile foundation is formed.

Images