Piling device for rotary precast pile

Abstract

The invention discloses a pile driving device for a rotary precast pile. The pile driving device comprises a drop hammer mechanism, a lifting mechanism, a rotary barrel, a driving batten and a device frame. The precast pile is arranged in the rotating cylinder body, and the rotating cylinder body is fixed on the device frame body; the drop hammer mechanism is arranged at the top of the device frame body, the lifting mechanisms are arranged on the two sides of the drop hammer mechanism and used for driving the drop hammer mechanism to reciprocate in the vertical direction, and repeated hammering of a precast pile is completed through a drop hammer body in the drop hammer mechanism. The driving batten is fixed to the device frame body and completes rotation driving of the rotating cylinder so as to drive the precast pile in the rotating cylinder to rotate around the axis. Through the structural arrangement of the device, the functions of rotary cutting and axial hammering are achieved, the resistance of the pile end and the pile side is reduced, and the pile sinking efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of pile driving equipment, and specifically relates to a pile driving device for rotary prefabricated piles. Background Art

[0002] With the acceleration of urbanization, precast piles have become the mainstream pile foundation form under complex geological conditions due to their controllable quality and efficient construction. Existing technologies mostly use hammering construction, for example:

[0003] Patent: A concrete precast pile driving equipment (202120271272.0), which includes a chassis, a turntable is arranged on the chassis, a vehicle body is arranged on the turntable, an arm frame inclined upward is hinged on one side of the turntable located on the vehicle body, the top of the arm frame is vertically connected to a pile frame, a guide rail is fixed on the side of the pile frame away from the arm frame, a pile hammer is slidably connected to the guide rail, and a plurality of clamping mechanisms for limiting the pipe pile in a vertical state are arranged on the pile frame, and the plurality of clamping mechanisms are arranged at intervals along the height direction of the pile frame.

[0004] Patent: A multifunctional pile hammer device for prefabricated piles (201921849885.7), belongs to the field of mechanical equipment. It includes a barrel connected to a pile driver, the barrel can move up and down repeatedly in the vertical direction so as to get close to or away from the ground, a hammering cavity for placing prefabricated piles is provided in the barrel, a fixing component for fixing the prefabricated piles is provided in the hammering cavity, the fixing component can move up and down repeatedly along the axis of the hammering cavity, a heavy hammer block that can move up and down repeatedly along the axis of the hammering cavity is also provided on the upper side of the fixing component, and a hydraulic hammer block that can move up and down repeatedly along the axis of the hammering cavity is also provided on the upper side of the heavy hammer block. The hydraulic hammer block in the utility model can move up and down at a high frequency and a small amplitude to hit the heavy hammer block, so that the pile vibrates at a high frequency and hits the rock to break the rock so that the pile continues to be driven into the soil.

[0005] However, the traditional hammering method, vibration method and static pressure method have significant defects: the hammering method is noisy and easily damages the pile body; the vibration method disturbs the soil structure and has insufficient penetration; the static pressure method relies on large-tonnage equipment, is costly and difficult to construct in hard soil layers. Existing rotary technologies (such as screw piles) are mostly used for small-diameter piles or steel piles. The construction of large-diameter prefabricated reinforced concrete piles still faces problems such as low power efficiency, large verticality deviation, and uncontrollable disturbance of the pile-soil interface, which restricts its engineering applicability. Summary of the invention

[0006] The purpose of the present application is to overcome the problems of the prior art and disclose a rotary modular prefabricated pile and a pile driving device thereof. The structural setting of the device of the present application realizes the functions of rotary cutting + axial hammering, reduces the resistance of the pile end and the pile side and improves the pile driving efficiency.

[0007] The object of the present application is achieved through the following technical solutions:

[0008] A pile driving device for a rotary precast pile, the pile driving device comprising: a drop hammer mechanism, a lifting mechanism, a rotary cylinder, a driving strip plate and a device frame;

[0009] The precast pile is arranged inside the rotary cylinder, and the rotary cylinder is fixed on the device frame;

[0010] The drop hammer mechanism is arranged at the top of the device frame, and the lifting mechanism is arranged on both sides of the drop hammer mechanism for driving the drop hammer mechanism to perform reciprocating motion in the vertical direction, and the drop hammer body in the drop hammer mechanism completes the repeated hammering of the precast pile;

[0011] The driving strip plate is fixed on the device frame and completes the rotary drive of the rotary cylinder to drive the precast pile in the rotary cylinder to rotate around the axis.

[0012] According to a preferred embodiment, the precast pile is composed of a plurality of precast pile bodies spliced by butt flanges, and a plurality of cutting rings are sleeved outside the precast pile to complete the cutting of the lateral soil body;

[0013] And a drill bit is arranged at the bottom end of the precast pile, and the drill bit is connected to the precast pile body through a butt flange.

[0014] According to a preferred embodiment, the cutting ring is sleeved outside the butt flange;

[0015] A plurality of cutting teeth are arranged on the outer shell of the cutting ring, and a plurality of rib plates are vertically arranged on the inner side of the outer shell. Each rib plate is attached to the vertical convex rib on the butt flange to enable the cutting ring to rotate along with the rotation of the butt flange.

[0016] According to a preferred embodiment, the butt flange is fixedly connected to the top and bottom structural bodies through bolts.

[0017] According to a preferred embodiment, the device frame includes: a drop hammer support frame, a gantry support and a bottom plate;

[0018] The drop hammer support frame is located at the top of the device frame and is arranged on the top side of the gantry support for supporting the structure of the drop hammer mechanism;

[0019] The bottom side of the gantry support is provided with a bottom plate to form a closed frame structure, and the rotary cylinder is movably clamped between the gantry support and the bottom plate support.

[0020] According to a preferred embodiment, the driving strip plate is horizontally arranged on the gantry support and is driven by a driving gear arranged on the gantry support to realize the horizontal reciprocating motion of the driving strip plate;

[0021] And a rack structure is provided on the inner side of the driving strip plate, and a toothed structure is provided on the surface of the cylindrical shell of the rotating cylinder body. The rack structure on the driving strip plate is meshed with the toothed structure on the cylindrical shell.

[0022] According to a preferred embodiment, two driving strip plates are respectively provided on both sides of the portal bracket, and the two driving strip plates are symmetrically arranged on both sides of the rotating cylinder body; and both ends of the driving strip plate are movably clamped on the limiting baffles fixed on both sides of the portal bracket.

[0023] According to a preferred embodiment, the drop hammer mechanism includes: an outer frame and a drop hammer body;

[0024] Two cross-placed frame braces are provided at the center of the outer frame, and the frame braces pass through the drop hammer body to fix the drop hammer body;

[0025] And two vertical multi-rack plates are provided on the bottom sides of both ends of the outer frame. A continuous rack structure is provided on the outer side of the multi-rack plate, and a strip roller is provided on the inner side.

[0026] According to a preferred embodiment, the lifting mechanism includes a power mechanism and a semi-toothed runner, and the semi-toothed runner is driven by the power mechanism;

[0027] The semi-toothed runner has a continuous tooth surface on a part of the circumference, and the rest of the circumferential surface is a smooth arc surface, and the semi-toothed runner is meshed with the continuous rack structure on the outer side of the multi-rack plate,

[0028] During axial hammering operation, the power mechanism drives the semi-toothed runner to rotate. When the connecting rack on the multi-rack plate contacts the tooth surface part of the semi-toothed runner, it pushes the drop hammer mechanism to move upward. When the semi-toothed runner rotates to the position where the tooth surface part is disengaged from the continuous rack on the multi-rack plate, the drop hammer mechanism loses the upward thrust and falls freely downward, causing the drop hammer body to fall onto the top of the precast pile body and collide with the pile body to complete an axial hammering operation.

[0029] According to a preferred embodiment, the drop hammer support frame is a plate structure vertically arranged; the two plates of the drop hammer support frame are respectively inserted between the multi-rack plate and the strip roller.

[0030] The main solution of the present application and its various further selection solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed in the present application. Those skilled in the art can understand that there are various combinations according to the prior art and common general knowledge after understanding the solution of the present application, all of which are the technical solutions to be protected in the present application, and will not be enumerated here.

[0031] The beneficial effects of the present application:

[0032] The device of the present application utilizes the synergistic effect of rotary cutting and axial hammering. By means of rotary cutting, the side resistance of the pile is reduced, and at the same time, axial hammering provides the penetration power to achieve efficient pile driving. The cutting teeth of the cutting ring break the soil mass, reducing the disturbance of the pile-soil interface and ensuring the stability of the soil around the pile body.

[0033] In the device of the present application, the lifting mechanism adopts the mechanism design of a semi-toothed runner. Through the cooperation between the tooth surface and the sliding rack, the lifting and free fall of the drop hammer mechanism are realized to complete the axial hammering operation.

[0034] In the present application, the precast pile body adopts a modular assembled structure, which is convenient for transportation and assembly. The quick splicing of multiple precast piles is realized through the butt flange to ensure the continuity of construction. Description of the Drawings

[0035] Figure 1 is the overall structural schematic diagram of the pile driving device of the present application;

[0036] Figure 2 is the structural schematic diagram of the device frame of the device of the present application;

[0037] Figure 3 is the structural schematic diagram of the drop hammer mechanism of the device of the present application;

[0038] Figure 4 is the structural schematic diagram of the corresponding precast pile of the present application;

[0039] Figure 5 is the schematic diagram of the connection relationship between the rotary cylinder and the precast pile of the present application;

[0040] Figure 6 is the cross-sectional structural schematic diagram of the pile driving device of the present application;

[0041] Wherein, 1-drop hammer mechanism, 101-lifting lug, 102-outside frame, 103-frame roller, 104-frame brace, 105-drop hammer body, 106-multi-rack plate, 107-rack plate roller, 2-lifting mechanism, 201-semi-toothed runner, 202-power mechanism, 3-rotary cylinder, 301-cylinder shell, 302-supporting plate, 303-telescopic arm, 304-rack structure, 4-precast pile, 401-butt flange, 402-cutting ring, 403-precast pile body, 404-bolt, 405-bit, 4021-shell, 4022-rib plate, 4023-cutting tooth, 5-driving rack plate, 6-device frame, 601-drop hammer support frame, 602-gantry support, 603-driving gear, 604-limit baffle, 605-power unit, 606-bottom plate, 7-device wheel set. Detailed Embodiments

[0042] The following describes the implementation manners of the present application through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0043] It should be noted that: Similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0044] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed when in use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0045] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0046] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0047] In addition, it should be pointed out in the present application that in the present application, if the specific structures, connection relationships, positional relationships, power source relationships, etc. involved are not specifically written, then the structures, connection relationships, positional relationships, power source relationships, etc. involved in the present application are all known to those skilled in the art on the basis of the prior art without creative labor.

[0048] Embodiment 1

[0049] Reference Figures 1 to 6 As shown, the present application discloses a pile driving device for a rotary precast pile. The pile driving device includes: a drop hammer mechanism 1, a lifting mechanism 2, a rotating cylinder 3, a driving strip 5, a device frame 6, and a device wheel set 7.

[0050] The drop hammer mechanism 1 is located at the top of the device. The two ends of the drop hammer mechanism 1 are the lifting mechanisms 2. Below the lifting mechanisms 2 is the device frame 6, which is used to drive the drop hammer mechanism 1 to perform reciprocating motion in the vertical direction, and the drop hammer body 105 in the drop hammer mechanism 1 completes the repeated hammering of the precast pile 4; a cylindrical hollow rotating cylinder 3 is placed in the hollow area inside the device frame 6. Symmetrical rack structures 304 are fixed on the outer surface of the rotating cylinder 3. The precast pile body 4 is placed inside the rotating cylinder 3. Two symmetrically arranged driving strips 5 are installed on the front and rear sides of the device frame 6, and racks are fixed on the end faces and inner sides in the direction of their two long sides to complete the rotational drive of the rotating cylinder 3, so as to drive the precast pile 4 inside the rotating cylinder 3 to rotate around the axis; device wheel sets 7 are installed on both sides of the bottom of the device.

[0051] Preferably, the precast pile 4 is composed of a plurality of precast pile bodies 4 spliced by butt flanges 401, and a plurality of cutting rings 402 are sleeved outside the precast pile 4 to complete the cutting of the lateral soil body; and a drill bit 405 is provided at the bottom end of the precast pile 4, and the drill bit 405 is connected to the precast pile body 4 through the butt flange 401.

[0052] Preferably, the cutting ring 402 is sleeved outside the butt flange 401; a plurality of cutting teeth 4023 are provided on the outer shell 4021 of the cutting ring 402, and a plurality of rib plates 4022 are vertically arranged on the inner side of the outer shell 4021, and each rib plate 4022 is attached to the vertical convex ribs on the butt flange 401, so that the cutting ring 402 can rotate along with the rotation of the butt flange 401.

[0053] Further, the butt flange 401 is fixedly connected to the top and bottom side structures through bolts 404.

[0054] Specifically, the precast pile body 403 is a reinforced concrete pile. The upper and lower ends of the pile body are connected with butt flanges 401, and a plurality of annularly arranged holes are opened on the periphery of the top surface of the butt flange. Each cutting ring is formed by splicing two semi-circular cutting ring outer shells 4021. During the pile sinking construction, a conical drill bit 405 is also installed at the bottom of the first pile. The drill bit is fixed to the butt flange 401 through high-strength bolts 404 to complete the connection between the drill bit and the pile body. When driving the second pile, the two precast piles are connected through the splicing of the butt flanges. The fabrication and assembly of the precast pile body are both completed in the factory. The butt flange 401 and the precast pile body 403 can be processed as a whole, and then the installation of the remaining components is completed.

[0055] Preferably, the device frame body 6 includes: a drop hammer support frame 601, a portal frame 602, and a bottom plate 606; the drop hammer support frame 601 is located at the top of the device frame body 6 and is arranged on the top side of the portal frame 602 for structurally supporting the drop hammer mechanism 1; the bottom side of the portal frame 602 is provided with a bottom plate 606 to form a closed frame structure, and the rotating cylinder 3 is movably clamped between the portal frame 602 and the bottom plate 606.

[0056] Preferably, the driving strip plate 5 is horizontally arranged on the portal frame 602 and is driven by a driving gear 603 arranged on the portal frame 602 to realize the horizontal reciprocating movement of the driving strip plate 5; and a rack structure is arranged on the inner side of the driving strip plate 5, and a toothed structure is arranged on the surface of the cylinder shell 301 of the rotating cylinder 3, and the rack structure on the driving strip plate 5 is meshed with the toothed structure on the cylinder shell 301.

[0057] Furthermore, two driving strip plates 5 are respectively arranged on both sides of the portal frame 602, and the two driving strip plates 5 are symmetrically arranged on both sides of the rotating cylinder 3; and both ends of the driving strip plate 5 are movably clamped on the limiting baffles 604 fixed on both sides of the portal frame 602.

[0058] Preferably, the drop hammer mechanism 1 includes: an outer frame 102 and a drop hammer body 105; two cross-placed frame diagonal braces 104 are arranged at the center of the outer frame 102, and the frame diagonal braces 104 pass through the drop hammer body 105 to fix the drop hammer body 105; and two vertical multi-rack plates 106 are arranged at the bottom sides of both ends of the outer frame 102, a continuous rack structure is arranged on the outer side of the multi-rack plate 106, and a strip roller 107 is arranged on the inner side.

[0059] Specifically, the main structural functional unit of the drop hammer mechanism 1 is the drop hammer body 105. A lifting lug 101 is fixed at the top of the drop hammer body. The drop hammer body 105 is fixed on the horizontally placed drop hammer outer frame 102, and the drop hammer outer frame 102 is a rectangular frame body spliced by square tubes. Two groups of frame rollers 103 are installed on both sides of the drop hammer body inside the outer frame.

[0060] Preferably, the lifting mechanism 2 includes a power mechanism 202 and a semi-toothed runner 201, and the semi-toothed runner 201 is driven by the power mechanism 202; the semi-toothed runner 201 has a continuous tooth surface on a part of the circumference, and the rest of the circumferential surface is a smooth arc surface, and the semi-toothed runner 201 is meshed with the continuous rack structure on the outer side of the multi-rack plate 106.

[0061] When performing axial hammering operations, the power mechanism 202 drives the semi-toothed runner 201 to rotate. When the toothed part of the semi-toothed runner 201 comes into contact with the connecting rack on the multi-rack plate 106, it pushes the drop hammer mechanism 1 upward. When the toothed part of the semi-toothed runner 201 rotates away from the continuous rack on the multi-rack plate 106, the drop hammer mechanism 1 loses the upward thrust and falls freely downward, causing the drop hammer body 105 to drop onto the top of the precast pile 4 and collide with the pile body to complete one axial hammering operation.

[0062] Preferably, the drop hammer support frame 601 is a plate structure vertically arranged in two; each of the two plates of the drop hammer support frame 601 is inserted between the multi-rack plate 106 and the strip roller 107 respectively.

[0063] The working principle of the device of this application includes:

[0064] (1) Rotary cutting

[0065] The power unit 605 provides kinetic energy for the driving strip 5 of the device and the device wheel set 7. During operation, the power unit 605 drives the driving gear 603 to rotate. The driving gear 603 drives the driving strip 5 to move horizontally through the meshing action of the rack. The driving strip 5 drives the rotating cylinder 3 to rotate through the meshing of the rack on the inner side surface with the rack on the outer surface of the rotating cylinder 3. The power unit uniformly controls the rotation speed, rotation angle and forward and reverse rotation frequency of the driving gear 603, so that its angular velocity of rotation remains at 5 r / s - 10 r / s, and the time interval for forward and reverse rotation switching is 2 s.

[0066] As Figure 5 shown, several telescopic arms 303 are installed on the inner surface of the rotating cylinder 3. The end of the telescopic arm is connected with a support plate 302. In the horizontal direction, the telescopic arms 303 are distributed at intervals of 90° around the axis of the cylinder, and 3 - 5 groups are evenly arranged in the axial direction of the cylinder. After the precast pile body is inserted into the rotating cylinder 3, the telescopic arms 303 extend to make the support plate 302 contact the outer surface of the precast pile body 4 and support it. When the rotating cylinder starts to rotate, the precast pile body 4 rotates simultaneously with the rotating cylinder.

[0067] When the precast pile body penetrates into the formation and rotates back and forth, the cutting teeth 4023 on the cutting ring 402 break the formation soil, reduce the resistance of the soil on the pile side to the pile body, and make the precast pile easier to penetrate into the soil.

[0068] (2) Axial hammering

[0069] As Figure 6As shown, the drop hammer support frame 601 enables the drop hammer mechanism to move only up and down relative to the drop hammer support frame 601 through the gap between the frame drums 103. The lifting mechanism 2 is composed of a semi-toothed runner 201 and a power mechanism 202. The semi-toothed runner 201 has a tooth surface on a part of its circumference, and the rest of the circumferential surface is a smooth arc surface. During axial hammering operations, the power mechanism 202 drives the semi-toothed runner 201 to rotate. When the toothed part of the semi-toothed runner 201 contacts the multi-rack plate 106 of the drop hammer mechanism, it can push the drop hammer mechanism upward. When the toothed part of the semi-toothed runner 201 rotates away from the multi-rack plate 106, the drop hammer mechanism loses the upward thrust and rapidly moves downward, causing the drop hammer body 105 to fall onto the top of the precast pile body 4 and impact the pile body to complete an axial hammering operation.

[0070] The construction process of driving piles using this device can be as follows:

[0071] 1. Preparation of precast pile body: According to the design requirements, the precast pile body is fabricated and assembled in the factory. The precast pile shaft adopts a reinforced concrete structure, with butt flanges connected at both the upper and lower ends, and a cutting ring is installed on the side of the butt flange. Cutting teeth are installed inside the cutting ring to break the formation soil and reduce the side resistance of the pile.

[0072] 2. Equipment positioning and calibration: Move the pile driving device to the construction location, adjust the horizontal position of the device through the device wheel set, and ensure the verticality of the device frame. Use a laser level to calibrate the device to ensure construction accuracy.

[0073] 3. Installation of the first precast pile body: Lift the first precast pile body above the pile driving device and insert the pile body into the rotating cylinder. When the conical drill bit at the bottom of the pile body reaches the formation, lock the pile body through the telescopic arm and the support plate.

[0074] 4. Start of the rotary cutting function: Start the power unit to make the drive strip pull the rotating cylinder and the precast pile body back and forth to rotate, driving the cutting teeth on the cutting ring to break the formation soil and reduce the resistance of the soil on the side of the pile to the pile body.

[0075] 5. Start of the axial hammering function: Start the power mechanism to drive the semi-toothed runner to rotate, lift the drop hammer mechanism to a predetermined height, keep the semi-toothed runner rotating, and make the drop hammer mechanism lose weight and impact the precast pile body. Rotary cutting and axial hammering can be carried out alternately or simultaneously.

[0076] 6. Penetration of the first pile: Keep the rotary cutting and axial hammering acting continuously in coordination and gradually penetrate the precast pile into the formation.

[0077] 7. Prefabricated pile body splicing: When the first pile is penetrated to the designed depth, stop the rotary cutting and axial hammering operations. Lift the second prefabricated pile body above the rotating cylinder, connect it to the first pile through the docking flange, and fix it with high-strength bolts. After the splicing is completed, restart the rotary cutting and axial hammering functions to continue to penetrate the subsequent piles into the formation.

[0078] 8. Repeat the operation: According to the design requirements, splice multiple precast piles in sequence until the designed depth is reached.

[0079] 9. Construction completion: When the prefabricated piles are constructed to the designed depth, stop the rotary cutting and axial hammering operations, and remove the piling device from the construction location. After the construction is completed, clean up the construction site, recycle the remaining materials and equipment, and ensure that the site is clean.

[0080] 10. Quality inspection after construction

[0081] (1) Pile verticality inspection: Use a total station or laser level to re-measure the verticality of the pile to ensure that the vertical deviation meets the design requirements.

[0082] (2) Pile bearing capacity test: The bearing capacity of the pile is tested through static load test or dynamic load test to ensure that the pile can withstand the design load.

[0083] (3) Inspection of pile-soil interface quality: Check the quality of the pile-soil interface through core sampling or ultrasonic testing to ensure that the pile body is well integrated with the surrounding soil.

[0084] The device of the present application utilizes the synergistic effect of rotary cutting and axial hammering, reduces the pile side resistance through rotary cutting, and provides penetration power through axial hammering to achieve efficient pile sinking. The cutting teeth of the cutting ring crush the soil, reduce the disturbance of the pile-soil interface, and ensure the stability of the soil around the pile. The lifting mechanism in the device of the present application adopts the mechanism design of a half-toothed wheel, and the lifting and free fall of the drop hammer mechanism are achieved through the cooperation of the tooth surface and the sliding rack to complete the axial hammering operation.

[0085] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A piling device for a rotary precast pile, characterized in that: The piling device comprises: a drop hammer mechanism (1), a lifting mechanism (2), a rotating cylinder (3), a driving strip plate (5) and a device frame (6); The prefabricated pile (4) is arranged inside the rotating cylinder (3), and the rotating cylinder (3) is fixed on the device frame (6); The drop hammer mechanism (1) is arranged on the top of the device frame (6), and the lifting mechanism (2) is arranged on both sides of the drop hammer mechanism (1) to drive the drop hammer mechanism (1) to reciprocate in the vertical direction, and the drop hammer body (105) in the drop hammer mechanism (1) completes the repeated hammering of the prefabricated pile (4); The driving strip (5) is fixed on the device frame (6) and completes the rotation drive of the rotating cylinder (3) to drive the precast piles (4) in the rotating cylinder (3) to rotate around the axis.

2. The rotary precast pile driving device according to claim 1, characterized in that: The prefabricated pile (4) is composed of a plurality of prefabricated pile bodies (403) connected by a butt flange (401), and a plurality of cutting rings (402) are sleeved on the outer side of the prefabricated pile (4) to complete the cutting of the lateral soil body; A drill bit (405) is provided at the bottom end of the prefabricated pile (4), and the drill bit (405) is connected to the prefabricated pile body (403) via a docking flange (401).

3. The piling device for rotary precast piles according to claim 2, characterized in that: The cutting ring (402) is sleeved on the outside of the docking flange (401); A plurality of cutting teeth (4023) are arranged on the outer shell (4021) of the cutting ring (402), and a plurality of ribs (4022) are vertically arranged inside the outer shell (4021), and each rib (4022) is in contact with a vertical convex edge on the docking flange (401), so that the cutting ring (402) can rotate along with the docking flange (401) when the docking flange (401) rotates.

4. The rotary precast pile driving device according to claim 2, characterized in that: The butt flange (401) is fixedly connected to the top and bottom structures via bolts (404).

5. The rotary precast pile driving device according to claim 2, characterized in that: The device frame (6) comprises: a drop weight support frame (601), a door-shaped support (602) and a bottom plate (606); The drop hammer support frame (601) is located at the top of the device frame (6), and is arranged on the top side of the door-shaped support (602), and is used to complete the structural support of the drop hammer mechanism (1); A bottom plate (606) is provided on the bottom side of the door-shaped bracket (602) to form a closed frame structure, and the rotating cylinder (3) is movably connected to the door-shaped bracket (602) and the bottom plate (606) bracket.

6. The rotary precast pile driving device according to claim 5, characterized in that: The driving strip plate (5) is transversely arranged on the door-shaped bracket (602) and is driven by a driving gear (603) arranged on the door-shaped bracket (602) to achieve transverse reciprocating motion of the driving strip plate (5); The inner side of the driving strip plate (5) is provided with a rack structure, and the surface of the cylinder shell (301) of the rotating cylinder (3) is provided with a toothed structure, and the rack structure on the driving strip plate (5) is meshed with the toothed structure on the cylinder shell (301).

7. The rotary precast pile driving device according to claim 6, characterized in that: Two driving strips (5) are respectively provided on both sides of the door-shaped bracket (602), and the two driving strips (5) are symmetrically arranged on both sides of the rotating cylinder (3); Furthermore, the two ends of the driving strip plate (5) are movably clamped on the limit baffles (604) fixed on the two sides of the door-shaped bracket (602).

8. The rotary precast pile driving device according to claim 6, characterized in that: The drop hammer mechanism (1) comprises: an outer frame (102) and a drop hammer body (105); Two cross-placed frame braces (104) are provided at the center of the outer frame (102), and the frame braces (104) are arranged through the drop hammer body (105) to fix the drop hammer body; The bottom outer frames (102) at both ends are provided with two vertical multi-tooth plates (106), the multi-tooth plates (106) are provided with continuous tooth structures on the outer sides and strip plate rollers (107) on the inner sides.

9. The rotary precast pile driving device according to claim 8, characterized in that: The lifting mechanism (2) comprises a power mechanism (202) and a semi-toothed rotating wheel (201), and the semi-toothed rotating wheel (201) is driven by the power mechanism (202); The semi-toothed rotating wheel (201) has a continuous tooth surface on a part of its circumference, and the rest of its circumference is a smooth arc surface, and the semi-toothed rotating wheel (201) is meshed with the continuous rack structure on the outer side of the multi-rack plate (106). When performing an axial hammering operation, the power mechanism (202) drives the semi-toothed rotating wheel (201) to rotate. When the toothed surface of the semi-toothed rotating wheel (201) contacts the connected rack on the multi-rack plate (106), the hammer mechanism (1) is pushed to move upward. When the semi-toothed rotating wheel (201) rotates to the toothed surface and the continuous rack on the multi-rack plate (106) is disengaged, the hammer mechanism (1) loses the upward thrust and freely falls downward, so that the hammer body (105) falls to the top of the prefabricated pile body (4) and collides with the pile body to complete an axial hammering operation.

10. The rotary precast pile driving device according to claim 6, characterized in that: The drop hammer support frame (601) is a structure of two vertically arranged plates; each of the two plates of the drop hammer support frame (601) is respectively inserted between the multi-tooth plate (106) and the strip plate roller (107).

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