A construction system for a pull-out resistant precast hollow pile and a bearing platform and its usage method

Abstract

The present invention discloses a pull-out resistant prefabricated hollow pile and foundation construction system and a method for using the same. The system comprises: a prefabricated hollow pipe pile; an embedded pull-out resistant unit, comprising a threaded steel casing, a connecting rod, a steel support plate, a second filling layer, a first filling layer arranged between the inner wall of the threaded steel casing and the connecting rod, and a reserved steel bar fixedly arranged on the pipe body of the threaded steel casing and extending out; a roughening treatment device for uniformly treating the inner surface of the prefabricated hollow pipe pile in advance, comprising a machine casing, a supporting wheel assembly, a workpiece support part, a direction control assembly, a motion control assembly, and a roughening knife drive assembly; and an electronic control unit for controlling the coordinated work of a power source. The present invention effectively avoids the technical problem of insufficient connection between the inner wall of the prefabricated hollow pipe pile and the anchor steel bar by arranging a threaded steel casing and two filling cavities for transmitting pull-out force inside the prefabricated hollow pipe pile, thereby playing an auxiliary role in improving the pull-out resistance.

Description

Technical Field

[0001] The present invention belongs to the field of pull-out resistance technology, and more specifically, relates to a pull-out resistance prefabricated hollow pile and cap construction system and a method for using the same. Background Art

[0002] Existing high-rise residential communities all involve underground projects, and anti-floating design is a priority for underground projects. The use of pull-out piles is the most common anti-floating measure. Generally, the pull-out force of a pull-out pile is transmitted to the pedestal through the friction provided by the soil around the pile. The pedestal restrains the upward buoyancy of the bottom slab. Currently, a common practice in engineering is to reserve reinforcement for the prefabricated hollow pile body and anchor it into the pedestal. The reinforcement transmits the pull-out force between the pile and the pedestal. Furthermore, the hollow portion of the pile head must be poured with concrete and equipped with structural reinforcement anchored into the pedestal. Hollow piles with pull-out resistance requirements require the retention of pull-out reinforcement and structural reinforcement anchored into the pedestal. The large amount of reinforcement at the pile head makes the construction process more complicated, and reinforcement can easily be missed if care is not taken. Therefore, proposing a pull-out pile construction method that is simple, convenient, and has strong pull-out resistance is of great significance for improving construction efficiency.

[0003] To address the aforementioned technical issues, Chinese utility model patent CN203270554U provides a pipe pile joint and pipe pile foundation, designed to improve the connection quality between the pipe pile and the pedestal. The pipe pile joint comprises a pipe pile, core-fill concrete, core-fill concrete reinforcement, and welded reinforcement. The core-fill concrete is formed on the inner wall of the pipe pile. The core-fill concrete reinforcement is partially embedded in the core-fill concrete and partially protrudes above the top of the pipe pile. The welded reinforcement is partially welded to the side of the pipe pile and partially protrudes above the top of the pipe pile. The pipe pile joint comprises the pedestal and the aforementioned pipe pile joint. The portion of the core-fill concrete reinforcement that protrudes above the top of the pipe pile and the portion of the welded reinforcement that protrudes above the top of the pipe pile are each welded to the pedestal. Chinese invention patent CN106320327A discloses an anti-pullout pipe pile and a method for connecting it to a foundation slab. The pile head of the concrete pipe pile is provided with several sleeves that are threadedly connected to anchor steel bars. The anchor steel bars are connected by internal threads of the sleeves and then pre-buried in the concrete pipe pile. The concrete pipe pile is connected to the anti-pullout steel bars of the foundation slab by threads of the sleeves to form an anti-pullout pipe pile foundation.

[0004] However, the existing technology still has the following deficiencies: (1) The connection method between the anchor steel bars inserted into the precast hollow pipe pile and the inner wall of the precast hollow pipe pile is often a mechanical contact connection. The effective contact surface of this connection method is small, and it fails to form a sufficient connection between the inner wall of the precast hollow pipe pile and the anchor steel bars, resulting in a decrease in the pull-out resistance; (2) The inner wall of the precast hollow pipe pile is not uniformly roughened before installation, which requires separate roughening treatment during subsequent construction, reducing construction efficiency; (3) The existing roughening method mostly relies on mechanical claws to press down when installing the anchor steel bars to the inner wall of the precast hollow pipe pile, thereby scratching the inner wall of the precast hollow pipe pile. This roughening method is relatively simple, and the resulting roughening effect is poor, which affects the sufficient connection effect between the inner wall and the anchor steel bars. Summary of the Invention

[0005] In response to the above defects or improvement needs of the prior art, the present invention provides a pull-out resistant prefabricated hollow pile and foundation construction system. By setting a threaded steel casing and a connecting rod for transmitting pull-out force inside the prefabricated hollow pipe pile, and setting two filling cavities, it effectively avoids the technical problem that the effective contact area between the anchor steel bar inserted into the prefabricated hollow pipe pile and the inner wall of the prefabricated hollow pipe pile is small when the mechanical contact connection is adopted, resulting in insufficient connection between the inner wall of the prefabricated hollow pipe pile and the anchor steel bar. By filling the filling area with concrete or structural adhesive, the threaded steel casing can be fully contacted with the inner wall of the prefabricated hollow pipe pile, effectively increasing the effective contact area and enhancing the pull-out resistance. In addition, the present invention uses a roughening treatment device to uniformly roughen the inner surface of the prefabricated hollow pipe pile before pre-embedding it, effectively enhancing the connection effect between the inner surface and the filler, and playing an auxiliary role in improving the pull-out resistance. Including:

[0006] Prefabricated hollow pipe piles embedded in advance under the foundation;

[0007] An embedded anti-pullout unit installed in the prefabricated hollow pipe pile for assisting in transmitting and enhancing the pullout resistance includes a threaded steel casing, a connecting rod installed in the threaded steel casing, a steel support plate fixedly connected to the lower end of the connecting rod for sealing the bottom of the threaded steel casing and the horizontal end surface of the prefabricated hollow pipe pile, a second filling layer provided on the outer wall of the threaded steel casing and the inner wall of the prefabricated hollow pipe pile, a first filling layer provided between the inner wall of the threaded steel casing and the connecting rod, and a reserved steel bar fixedly provided on the threaded steel casing body and extending outward;

[0008] The chiseling device is used for uniformly treating the inner surface of a prefabricated hollow pipe pile in advance, comprising a casing, a support wheel assembly fixedly connected to the upper left and right sides of the casing and composed of a universal wheel seat body and a universal support wheel for supporting the prefabricated hollow pipe pile, a workpiece support portion that is in direct contact with the outer wall of the prefabricated hollow pipe pile and is provided with universal wheel holes on both sides and a moving wheel hole at the bottom, a direction control assembly fixedly connected to the casing for controlling the forward direction of the prefabricated hollow pipe pile above the workpiece support portion, a motion control assembly that is in direct contact with the bottom of the prefabricated hollow pipe pile and drives the prefabricated hollow pipe pile to move by friction, and a chiseling knife drive assembly fixedly connected to the casing and inserted into the interior of the prefabricated hollow pipe pile for chiseling.

[0009] An electronic control unit used to control the coordinated operation of power sources.

[0010] Preferably, the direction control component includes:

[0011] A direction control motor fixedly connected to the housing, a first bevel gear fixedly connected to the output shaft of the direction control motor, a second bevel gear meshing with the first bevel gear, and a bevel gear shaft fixedly connecting the rotation center of the second bevel gear to the motion control component.

[0012] Preferably, the motion control component includes:

[0013] A movable housing fixedly connected to the rotation center of the second bevel gear via a bevel gear shaft, a motion control motor fixedly connected to one side of the movable housing in a horizontal direction, a first spur gear fixedly connected to the output shaft of the motion control motor, a second spur gear meshing with the first spur gear for transmission, and a moving wheel coaxially fixedly connected to the rotation center of the second spur gear via the spur gear shaft.

[0014] Preferably, the chiseling tool drive assembly comprises:

[0015] A positioning plate fixedly connected to the housing, a chiseling blade drive motor fixedly connected to the center of the positioning plate, and a driving connecting rod fixedly connected to the output shaft of the chiseling blade drive motor;

[0016] A plurality of groups of chiseling cutter motion link assemblies are distributed in a circular equidistant array along the positioning plate and are rotatably connected to the second rotating connecting shaft at the other end of the driving connecting rod, which include a driven connecting rod rotatably connected to the second rotating connecting shaft, a chiseling cutter rotatably connected to the first rotating connecting shaft at the other end of the driven connecting rod and slidably connected to a motion slide groove arranged on the periphery of the positioning plate, and a cutter head arranged at the protruding end of the chiseling cutter.

[0017] Preferably, the fillers inside the first filling layer and the second filling layer are concrete or structural adhesive.

[0018] Preferably, the electronic control unit includes:

[0019] A power supply, a motion control card for coordinating and controlling the operation of the motor, and a current sensor for detecting and feeding back the current signal of the chiseling cutter driving motor. The output end of the current sensor is connected to the motion control card through a wire.

[0020] Preferably, it is characterized in that:

[0021] The number of the chiseling tool movement connecting rod assemblies is 3 to 6 groups.

[0022] A method for using a pull-out resistant prefabricated hollow pile and cap construction system comprises the following steps:

[0023] S100: First, the inner surface of the prefabricated hollow pipe pile is uniformly roughened by a roughening processing device;

[0024] S200: bury the prefabricated hollow pipe piles under the foundation;

[0025] S300: Insert the connecting rod into the hollow threaded steel casing and weld the steel support plate to the bottom of the connecting rod;

[0026] S400: With the steel support plate facing downward, place the threaded steel casing together with the internal connecting rod into the prefabricated hollow pipe pile; then, fill the first filling layer and the second filling layer with concrete or structural adhesive to complete the construction of the pull-out structure, and finally, thread the top steel plate and the threaded steel casing together, and construct the foundation above the pedestal to complete the construction process of the entire pull-out structure.

[0027] Preferably, the S100 includes the following steps:

[0028] S101: First, place the prefabricated hollow pipe pile horizontally upside down on the workpiece support and maintain good contact;

[0029] S102: The universal support wheel in the workpiece support portion maintains contact with the prefabricated hollow pipe pile, thereby supporting the prefabricated hollow pipe pile. When the prefabricated hollow pipe pile rotates, the universal support wheel rotates accordingly.

[0030] S103: activating the direction control component to change the direction of the motion control component, and activating the motion control component, so that the prefabricated hollow pipe pile moves above the workpiece support portion according to the superposition of the effects of the direction control component and the motion control component;

[0031] S104: The chiseling cutter driving assembly is started, and scraping is generated between the cutter head and the inner surface of the prefabricated hollow pipe pile, thereby achieving a chiseling effect.

[0032] Preferably, the S104 includes the following steps:

[0033] S1041: First, place the prefabricated hollow pipe pile horizontally upside down on the workpiece support and maintain good contact;

[0034] S1042: The universal support wheel in the workpiece support portion maintains contact with the prefabricated hollow pipe pile, thereby supporting the prefabricated hollow pipe pile. When the prefabricated hollow pipe pile rotates, the universal support wheel rotates accordingly.

[0035] S1043: activating the direction control component to change the direction of the motion control component, and activating the motion control component, so that the prefabricated hollow pipe pile moves above the workpiece support portion according to the superposition of the effects of the direction control component and the motion control component;

[0036] S1044: The chiseling cutter driving assembly is started, and scraping is generated between the cutter head and the inner surface of the prefabricated hollow pipe pile, thereby achieving a chiseling effect.

[0037] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0038] 1. A pull-out resistant prefabricated hollow pile and foundation foundation construction system of the present invention, by arranging a threaded steel casing and a connecting rod for transmitting pull-out force inside the prefabricated hollow pipe pile, and providing two filling cavities, effectively avoids the technical problem of insufficient connection between the inner wall of the prefabricated hollow pipe pile and the anchoring steel bar caused by a small effective contact surface when the anchoring steel bar inserted into the prefabricated hollow pipe pile is mechanically connected with the inner wall of the prefabricated hollow pipe pile. By filling the filling area with concrete or structural adhesive, sufficient contact between the threaded steel casing and the inner wall of the prefabricated hollow pipe pile can be achieved, effectively increasing the effective contact area and enhancing the pull-out resistance. In addition, the present invention uses a roughening treatment device to uniformly roughen the inner surface of the prefabricated hollow pipe pile before pre-embedding, effectively enhancing the connection effect between the inner surface and the filler, and playing an auxiliary role in improving the pull-out resistance.

[0039] 2. The present invention provides a pull-out resistant prefabricated hollow pile and cap construction system. A direction control assembly is provided below the prefabricated hollow pipe pile. This assembly, in conjunction with a motion control assembly, can effectively control the movement direction of the prefabricated hollow pipe pile. When the direction control motor rotates, it drives the first bevel gear to rotate synchronously, thereby driving the second bevel gear to rotate, which in turn drives the motion control assembly to rotate. The motion control assembly is then activated, causing the prefabricated hollow pipe pile to move.

[0040] 3. The present invention's pull-out-resistant precast hollow pile and cap construction system utilizes friction between the motion wheel and the outer surface of the precast hollow pipe pile to drive its movement. When the motion control motor rotates, it drives the first spur gear to rotate, which in turn drives the second spur gear to rotate in the opposite direction, and thus drives the motion wheel to rotate. Ultimately, friction causes the precast hollow pipe pile to move. Effective drive is achieved while ensuring that the outer wall of the precast hollow pipe pile does not wear. Furthermore, multi-directional motion control is effectively achieved in conjunction with the direction control assembly.

[0041] 4. The pull-out resistant prefabricated hollow pile and foundation foundation construction system of the present invention effectively realizes the randomness of the chiseling depth, increases the irregularity of the chiseling, and effectively improves the chiseling effect by using a chiseling tool driving assembly with a chiseling tool extending into the interior of the prefabricated hollow pipe pile and a multi-link motion tool assembly composed of a crank slider mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the overall structure of an anti-pullout prefabricated hollow pile and cap construction system in an installation state according to an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of the top view of the installed structure of a pull-out resistant prefabricated hollow pile and foundation pile construction system according to an embodiment of the present invention.

[0044] Figure 3 This is a schematic side structural diagram of a roughening device for a pull-out resistant prefabricated hollow pile and cap construction system according to an embodiment of the present invention;

[0045] Figure 4 This is a partially enlarged structural schematic diagram of a roughening processing device of a pull-out resistant prefabricated hollow pile and foundation pile construction system according to an embodiment of the present invention.

[0046] Figure 5 This is a schematic diagram of the hardware connection structure of a pull-out resistant prefabricated hollow pile and a cap construction system according to an embodiment of the present invention;

[0047] Figure 6 This is a schematic diagram of the electrical control connection between a pull-out resistant prefabricated hollow pile and a cap construction system according to an embodiment of the present invention.

[0048] In all the drawings, the same reference numerals represent the same technical features, specifically: 1-prefabricated hollow pipe pile, 2-embedded anti-pullout unit, 201-threaded steel casing, 202-connecting rod, 203-first filling layer, 204-steel support plate, 205-reserved steel bars, 206-top steel plate, 207-second filling layer, 3-cap, 4-roughening device, 400-housing, 410-support wheel assembly, 411-universal wheel seat, 412-universal support wheel, 420-workpiece support part, 421-universal wheel hole, 422-motion wheel hole, 430-direction control assembly, 4 31-direction control motor, 432-first bevel gear, 433-second bevel gear, 434-bevel gear shaft, 440-motion control assembly, 441-movable housing, 442-motion control motor, 443-first spur gear, 444-second spur gear, 445-spur gear shaft, 446-movement wheel, 450-chipping knife drive assembly, 451-positioning plate, 452-revolving motion area, 453-motion slide, 454-chipping knife, 455-cutter head, 456-first rotating connecting shaft, 457-driven connecting rod, 458-driving connecting rod, 459-second rotating connecting shaft. DETAILED DESCRIPTION

[0049] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0050] like Figures 1 to 5 As shown, in an embodiment of the present invention, the pull-out resistant prefabricated hollow pile and cap construction system includes:

[0051] Prefabricated hollow pipe piles 1 embedded in advance below the cap 3;

[0052] An embedded anti-pullout unit 2 installed in the prefabricated hollow pipe pile 1 for assisting in transmitting and enhancing the pullout resistance comprises a threaded steel casing 201, a connecting rod 202 installed in the threaded steel casing 201, a steel support plate 204 fixedly connected to the lower end of the connecting rod 202 for sealing the bottom of the threaded steel casing 201 and the horizontal end surface of the prefabricated hollow pipe pile 1, a second filling layer 207 provided between the outer wall of the threaded steel casing 201 and the inner wall of the prefabricated hollow pipe pile 1, a first filling layer 203 provided between the inner wall of the threaded steel casing 201 and the connecting rod 202, and a reserved steel bar 205 fixedly provided on the pipe body of the threaded steel casing 201 and extending outward;

[0053] The chiseling device 4 for uniformly treating the inner surface of a prefabricated hollow pipe pile 1 in advance comprises a casing 400, a support wheel assembly 410 fixedly connected to the upper left and right sides of the casing 400 and composed of a universal wheel seat 411 and a universal support wheel 412 for supporting the prefabricated hollow pipe pile 1, a workpiece support portion 420 directly in contact with the outer wall of the prefabricated hollow pipe pile 1 and provided with universal wheel holes 421 on both sides and a moving wheel hole 422 at the bottom, a direction control assembly 430 fixedly connected to the casing 400 for controlling the forward direction of the prefabricated hollow pipe pile 1 above the workpiece support portion 420, a motion control assembly 440 directly in contact with the bottom of the prefabricated hollow pipe pile 1 and driving it to move by friction, and a chiseling knife drive assembly 450 fixedly connected to the casing 400 and inserted into the interior of the prefabricated hollow pipe pile 1 for chiseling.

[0054] An electronic control unit used to control the coordinated operation of power sources.

[0055] In an embodiment of the present invention, a threaded steel casing 201 and a connecting rod 202 for transmitting pull-out force are provided inside the prefabricated hollow pipe pile 1, and two filling cavities are provided, thereby effectively avoiding the technical problem that the effective contact area between the anchor steel bars inserted inside the prefabricated hollow pipe pile and the inner wall of the prefabricated hollow pipe pile is small when mechanical contact connection is adopted, resulting in insufficient connection between the inner wall of the prefabricated hollow pipe pile and the anchor steel bars. By filling concrete or structural adhesive inside the filling area, sufficient contact between the threaded steel casing 201 and the inner wall of the prefabricated hollow pipe pile 1 can be achieved, thereby effectively increasing the effective contact area and enhancing the pull-out resistance. In addition, the present invention performs a uniform roughening treatment on the inner surface of the prefabricated hollow pipe pile 1 before embedding it through the roughening treatment device 4, thereby effectively enhancing the connection effect between the inner surface and the filler, and playing an auxiliary role in improving the pull-out resistance.

[0056] During use, the inner surface of the prefabricated hollow pipe pile 1 is first uniformly roughened by the roughening treatment device 4; then, the prefabricated hollow pipe pile 1 is buried under the base 3; then, the connecting rod 202 is extended into the hollow threaded steel casing 201, and the steel support plate 204 is welded to the bottom of the connecting rod 202; then, the steel support plate 204 is turned downward, and the threaded steel casing 201 and the internal connecting rod 202 are placed into the prefabricated hollow pipe pile 1; then, concrete or structural adhesive is filled in the first filling layer 203 and the second filling layer 207 to complete the construction of the pull-out structure, and finally the top steel plate 206 is threadedly connected to the threaded steel casing 201, and the foundation above the base is constructed to complete the construction process of the entire pull-out structure.

[0057] When the roughening processing device 4 is in use, the prefabricated hollow pipe pile 1 is first placed horizontally upside down above the workpiece support part 420 and maintains good contact; then, the universal support wheel 412 in the workpiece support part 410 maintains contact with the prefabricated hollow pipe pile 1, thereby supporting the prefabricated hollow pipe pile 1, and when the prefabricated hollow pipe pile 1 rotates, the universal support wheel 412 rotates accordingly; then, the direction control component 430 is started to change the direction of the motion control component 440, and the motion control component 440 is started, so that the prefabricated hollow pipe pile 1 moves above the workpiece support part 420 according to the superposition of the effects of the direction control component 430 and the motion control component 440; then, the roughening knife drive component 450 is started, and scraping is generated between its knife head 455 and the inner surface of the prefabricated hollow pipe pile 1, thereby achieving the roughening effect.

[0058] like Figure 3 As shown, in this embodiment of the present invention, the direction control component 430 includes:

[0059] A direction control motor 431 fixedly connected to the housing 400, a first bevel gear 432 fixedly connected to the output shaft of the direction control motor 431, a second bevel gear 433 meshing with the first bevel gear 432, and a bevel gear shaft 434 fixedly connecting the rotation center of the second bevel gear 433 to the motion control component 440.

[0060] In an embodiment of the present invention, by arranging a direction control component 430 under the prefabricated hollow pipe pile 1, the movement direction of the prefabricated hollow pipe pile 1 can be effectively controlled in cooperation with the motion control component 440; when the direction control motor 431 rotates, it drives the first bevel gear 432 to rotate synchronously, thereby driving the second bevel gear 433 to rotate, and then driving the motion control component 440 to rotate, and then starting the motion control component 440, so that the prefabricated hollow pipe pile 1 moves.

[0061] like Figure 3 As shown, in this embodiment of the present invention, the motion control component 440 includes:

[0062] A movable housing 441 fixedly connected to the rotation center of the second bevel gear 433 via the bevel gear shaft 434, a motion control motor 442 fixedly connected to one side of the movable housing 441 in a horizontal direction, a first spur gear 443 fixedly connected to the output shaft of the motion control motor 442, a second spur gear 444 meshing with the first spur gear 443 for transmission, and a moving wheel 446 coaxially fixedly connected to the rotation center of the second spur gear 444 via the spur gear shaft 445.

[0063] In this embodiment of the present invention, the motion of the precast hollow pipe pile is driven by the friction between the motion wheel 446 and the outer surface of the precast hollow pipe pile. When the motion control motor 442 rotates, it drives the first spur gear 443 to rotate, thereby driving the second spur gear 444 to rotate in the opposite direction, and further driving the motion wheel 446 to rotate. Ultimately, the frictional force causes the precast hollow pipe pile 1 to move. While ensuring that the outer wall of the precast hollow pipe pile 1 does not wear, effective drive is achieved. In conjunction with the direction control assembly 430, multi-directional motion control is effectively achieved.

[0064] like Figures 3 and 4 The chiseling blade drive assembly 450 in the embodiment of the present invention includes:

[0065] A positioning plate 451 fixedly connected to the housing 400, a chiseling blade drive motor fixedly connected to the center of the positioning plate 451, and a driving connecting rod 458 fixedly connected to the output shaft of the chiseling blade drive motor;

[0066] A plurality of groups of chiseling cutter motion link assemblies are distributed in a circular equidistant array along the positioning plate 451 and are rotatably connected to the second rotating connecting shaft 459 at the other end of the driving connecting rod 458, which include a driven connecting rod 457 rotatably connected to the second rotating connecting shaft 459, a chiseling cutter 454 rotatably connected to the first rotating connecting shaft 456 at the other end of the driven connecting rod 457 and slidably connected to the motion slide 453 arranged on the periphery of the positioning plate 451, and a cutter head 455 arranged at the protruding end of the chiseling cutter 454.

[0067] In an embodiment of the present invention, a chiseling tool drive assembly 450 with a chiseling tool extending into the interior of the prefabricated hollow pipe pile 1 is combined with a multi-link motion tool assembly composed of a crank slider mechanism to effectively achieve randomness in the chiseling depth, increase the irregularity of the chiseling, and effectively improve the chiseling effect. When in use, the chiseling tool drive motor is first started, thereby driving the driving connecting rod 458 to rotate, and then pulling the connecting rod 457, thereby pulling the chiseling tool 454 to slide within the motion slide 453, thereby achieving the extension and retraction movement of the cutter head 455, thereby achieving chiseling treatment of different depths on the inner wall of the prefabricated hollow pipe pile 1.

[0068] In the embodiment of the present invention, the fillers inside the first filling layer 203 and the second filling layer 207 are concrete or structural adhesive.

[0069] In an embodiment of the present invention, the electronic control unit includes a power supply, a motion control card for coordinating and controlling the operation of the motor, and a current sensor for detecting and feeding back the current signal of the chiseling cutter drive motor. The output end of the current sensor is connected to the motion control card via a wire.

[0070] In an embodiment of the present invention, the number of the chiseling tool motion connecting rod assemblies is 3 to 6 groups.

[0071] like Figure 6 As shown, in an embodiment of the present invention, a method for using a pull-out resistant prefabricated hollow pile and a cap construction system is proposed, comprising the following steps:

[0072] S100: First, the inner surface of the prefabricated hollow pipe pile 1 is uniformly roughened by the roughening processing device 4;

[0073] S200: burying the prefabricated hollow pipe pile 1 under the cap 3;

[0074] S300: Insert the connecting rod 202 into the hollow threaded steel casing 201, and weld the steel support plate 204 to the bottom of the connecting rod 202;

[0075] S400: Place the steel support plate 204 downward and place the threaded steel casing 201 together with the internal connecting rod 202 into the prefabricated hollow pipe pile 1; then, fill the first filling layer 203 and the second filling layer 207 with concrete or structural adhesive to complete the construction of the pull-out structure, and finally thread the top steel plate 206 with the threaded steel casing 201, and construct the foundation above the pedestal to complete the construction process of the entire pull-out structure.

[0076] In the embodiment of the present invention, the step S100 includes the following steps:

[0077] S101: First, the prefabricated hollow pipe pile 1 is placed horizontally above the workpiece support portion 420 and maintains good contact;

[0078] S102: The universal support wheel 412 in the workpiece support portion 410 maintains contact with the prefabricated hollow pipe pile 1, thereby supporting the prefabricated hollow pipe pile 1. When the prefabricated hollow pipe pile 1 rotates, the universal support wheel 412 rotates accordingly;

[0079] S103: activating the direction control component 430 to change the direction of the motion control component 440, and activating the motion control component 440, so that the prefabricated hollow pipe pile 1 moves above the workpiece support portion 420 according to the superposition of the effects of the direction control component 430 and the motion control component 440;

[0080] S104: The chiseling cutter driving assembly 450 is started, and scraping is generated between the cutter head 455 and the inner surface of the prefabricated hollow pipe pile 1, thereby achieving a chiseling effect.

[0081] In the embodiment of the present invention, the step S104 includes the following steps:

[0082] S1041: First, the prefabricated hollow pipe pile 1 is placed horizontally and upside down above the workpiece support portion 420 while maintaining good contact;

[0083] S1042: The universal support wheel 412 in the workpiece support portion 410 maintains contact with the prefabricated hollow pipe pile 1, thereby supporting the prefabricated hollow pipe pile 1. When the prefabricated hollow pipe pile 1 rotates, the universal support wheel 412 rotates accordingly;

[0084] S1043: activating the direction control component 430 to change the direction of the motion control component 440, and activating the motion control component 440, so that the prefabricated hollow pipe pile 1 moves above the workpiece support portion 420 according to the superposition of the effects of the direction control component 430 and the motion control component 440;

[0085] S1044: The chiseling cutter driving assembly 450 is started, and scraping is generated between the cutter head 455 and the inner surface of the prefabricated hollow pipe pile 1, thereby achieving a chiseling effect.

[0086] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pull-out resistant prefabricated hollow pile and cap construction system, characterized in that: include: Prefabricated hollow pipe piles (1) pre-buried below the foundation (3); An embedded pull-out resistance unit (2) installed in the prefabricated hollow pipe pile (1) for assisting in transmitting and enhancing pull-out resistance comprises a threaded steel casing (201), a connecting rod (202) installed in the threaded steel casing (201), a steel support plate (204) fixedly connected to the lower end of the connecting rod (202) for sealing the bottom of the threaded steel casing (201) and the horizontal end surface inside the prefabricated hollow pipe pile (1), a second filling layer (207) arranged between the outer wall of the threaded steel casing (201) and the inner wall of the prefabricated hollow pipe pile (1), a first filling layer (203) arranged between the inner wall of the threaded steel casing (201) and the connecting rod (202), and a reserved steel bar (205) fixedly arranged on the pipe body of the threaded steel casing (201) and extending outward; A chiseling device (4) for uniformly treating the inner surface of a prefabricated hollow pipe pile (1) in advance, comprising a housing (400), a support wheel assembly (410) fixedly connected to the upper left and right sides of the housing (400) and composed of a universal wheel seat (411) and a universal support wheel (412) for supporting the prefabricated hollow pipe pile (1), a workpiece support portion (420) in direct contact with the outer wall of the prefabricated hollow pipe pile (1) and provided with universal wheel holes (421) on both sides and a motion wheel hole (422) at the lower side, a direction control assembly (430) fixedly connected to the housing (400) for controlling the forward direction of the prefabricated hollow pipe pile (1) above the workpiece support portion (420), a motion control assembly (440) in direct contact with the lower side of the prefabricated hollow pipe pile (1) for driving the prefabricated hollow pipe pile (1) to move by friction, and a chiseling knife drive assembly (450) fixedly connected to the housing (400) and inserted into the interior of the prefabricated hollow pipe pile (1) for chiseling. An electronic control unit used to control the coordinated operation of power sources.

2. The pull-out resistant prefabricated hollow pile and cap construction system according to claim 1, characterized in that: The direction control component (430) includes: A direction control motor (431) fixedly connected to the housing (400), a first bevel gear (432) fixedly connected to the output shaft of the direction control motor (431), a second bevel gear (433) meshing with the first bevel gear (432) for transmission, and a bevel gear shaft (434) fixedly connecting the rotation center of the second bevel gear (433) to the motion control component (440).

3. The pull-out resistant prefabricated hollow pile and cap construction system according to claim 2, characterized in that: The motion control component (440) comprises: A movable housing (441) fixedly connected to the rotation center of the second bevel gear (433) via a bevel gear shaft (434), a motion control motor (442) fixedly connected to one side of the movable housing (441) in a horizontal direction, a first spur gear (443) fixedly connected to the output shaft of the motion control motor (442), a second spur gear (444) meshing with the first spur gear (443) for transmission, and a motion wheel (446) fixedly connected coaxially with the rotation center of the second spur gear (444) via a spur gear shaft (445).

4. A pull-out resistant prefabricated hollow pile and cap construction system according to any one of claims 1 to 3, characterized in that: The chiseling tool drive assembly (450) comprises: A positioning plate (451) fixedly connected to the housing (400), a haircutting blade driving motor fixedly connected to the center of the positioning plate (451), and a driving connecting rod (458) fixedly connected to the output shaft of the haircutting blade driving motor; A plurality of groups of haircutting knife motion link assemblies are distributed in an annular equidistant array along the positioning plate (451) and are rotationally connected to a second rotation connecting shaft (459) at the other end of the driving link (458), comprising a driven link (457) rotationally connected to the second rotation connecting shaft (459), a haircutting knife (454) rotationally connected to a first rotation connecting shaft (456) at the other end of the driven link (457) and slidably connected to a motion slide (453) arranged on the periphery of the positioning plate (451), and a knife head (455) arranged at the protruding end of the haircutting knife (454).

5. The pull-out resistant prefabricated hollow pile and cap construction system according to claim 4, characterized in that: The internal fillers of the first filling layer (203) and the second filling layer (207) are concrete or structural adhesive.

6. The pull-out resistant prefabricated hollow pile and cap construction system according to claim 5, characterized in that: The electronic control unit comprises: A power supply, a motion control card for coordinating and controlling the operation of the motor, and a current sensor for detecting and feeding back the current signal of the chiseling cutter driving motor. The output end of the current sensor is connected to the motion control card through a wire.

7. The pull-out resistant prefabricated hollow pile and cap construction system according to any one of claims 5 to 6, characterized in that: The number of the chiseling tool motion connecting rod assemblies is 3 to 6 groups.

8. The method for using the pull-out resistant prefabricated hollow pile and cap construction system according to claim 7, characterized in that: The steps include: S100: First, the inner surface of the prefabricated hollow pipe pile (1) is uniformly roughened by a roughening treatment device (4); S200: burying the prefabricated hollow pipe pile (1) under the cap (3); S300: Insert the connecting rod (202) into the hollow threaded steel casing (201), and weld the steel support plate (204) to the bottom of the connecting rod (202); S400: With the steel support plate (204) facing downward, the threaded steel casing (201) and the internal connecting rod (202) are placed inside the prefabricated hollow pipe pile (1); then, concrete or structural adhesive is filled inside the first filling layer (203) and the second filling layer (207), thereby completing the construction of the pull-out structure; finally, the top steel plate (206) is threadedly connected to the threaded steel casing (201), and the foundation above the pedestal is constructed, thereby completing the construction process of the entire pull-out structure.

9. The method for using the pull-out resistant prefabricated hollow pile and cap construction system according to claim 8, characterized in that: The S100 includes the following steps: S101: First, the prefabricated hollow pipe pile (1) is placed horizontally above the workpiece support portion (420) and kept in good contact; S102: The universal support wheel (412) in the workpiece support portion (420) maintains contact with the prefabricated hollow pipe pile (1), thereby supporting the prefabricated hollow pipe pile (1). When the prefabricated hollow pipe pile (1) rotates, the universal support wheel (412) rotates accordingly; S103: activating the direction control component (430) to change the orientation of the motion control component (440), and activating the motion control component (440), so that the prefabricated hollow pipe pile (1) moves above the workpiece support portion (420) according to the superposition of the effects of the direction control component (430) and the motion control component (440); S104: The chiseling cutter driving assembly (450) is started, and scraping is generated between the cutter head (455) and the inner surface of the prefabricated hollow pipe pile (1), thereby achieving a chiseling effect.

10. The method for using the pull-out resistant prefabricated hollow pile and cap construction system according to claim 9, characterized in that: The S104 includes the following steps: S1041: First, the prefabricated hollow pipe pile (1) is placed horizontally above the workpiece support portion (420) and maintained in good contact; S1042: The universal support wheel (412) in the workpiece support portion (420) maintains contact with the prefabricated hollow pipe pile (1), thereby supporting the prefabricated hollow pipe pile (1). When the prefabricated hollow pipe pile (1) rotates, the universal support wheel (412) rotates accordingly; S1043: activating the direction control component (430) to change the orientation of the motion control component (440), and activating the motion control component (440), so that the prefabricated hollow pipe pile (1) moves above the workpiece support portion (420) according to the superposition of the effects of the direction control component (430) and the motion control component (440); S1044: The chiseling cutter driving assembly (450) is started, and scraping is generated between the cutter head (455) and the inner surface of the prefabricated hollow pipe pile (1), thereby achieving a chiseling effect.

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