High-frequency drilling pile-forming system for pile foundation

Abstract

The invention relates to the technical field of cast-in-place pile hole forming, in particular to a pile foundation high-frequency drilling pile forming system which comprises a guide sleeve and a drill bit, the drill bit comprises a head and a guide part, the guide part is located in the guide sleeve, one axial end of the guide part is connected with the head, and the other end of the guide part is connected with a high-frequency vibration mechanical arm on a piling machine. The outer side wall of the guide part is suitable for being in axial movement fit with the inner wall of the guide sleeve, and the head part downwards extends out of the guide sleeve for tunneling; the head is in an inverted V shape formed by symmetrically connecting two plates, the end, away from the guide portion, of the head is a tip, the tip is a straight impact blade, the axis of the guide sleeve intersects with the impact blade, the impact blade is suitable for impacting soil or rock at high frequency, milling cutter discs are arranged on the two symmetrical outer side faces of the head, and a transmission mechanism is arranged on the inner side of the head and suitable for driving the milling cutter discs to rotate. The problem that the drilling efficiency is reduced due to the fact that a corresponding drill bit needs to be replaced when soft soil is converted into bedrock in the tunneling process in an existing hole forming technology is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of bored pile hole formation, and particularly to a high-frequency pile-forming system for pile foundation drilling. Background Art

[0002] Urban subway construction in China is mostly concentrated in the economically developed areas along the eastern coast and rivers. During the construction process, complex strata composed of various soft soils with high water content and bedrock, which are "soft on top and hard on the bottom with large undulations", are commonly encountered. When constructing underground projects, the selection of foundation pit support, foundation structure type and construction technology is mainly affected by the stratum conditions. In complex strata, the economic and construction period investment for foundation pit support and foundation construction often doubles, directly affecting the benefits of project construction. Therefore, it is an inevitable requirement during the project construction process to carry out technical research on the difficulties in the project construction process and develop relevant new technologies and new processes.

[0003] To ensure the stability of building structures, pile foundations are used for major buildings and stations. Currently, the commonly used hole-forming processes mainly include positive / negative circulation rotary drilling, impact drilling, rotary drilling, grab drilling, long spiral drilling, etc. The strata applicable to different hole-forming processes are also different. In the existing hole-forming processes, when facing the situation of changing from soft soil to bedrock during the tunneling process, the corresponding drill bit needs to be replaced, and frequent replacement of the drill bit in the complex strata composed of soft soil and bedrock will lead to a decrease in drilling efficiency. Summary of the Invention

[0004] In view of this, the present invention provides a high-frequency pile-forming system for pile foundation to solve the problem that the hole-forming process in the prior art requires replacing the corresponding drill bit when facing the situation of changing from soft soil to bedrock during the tunneling process, resulting in a decrease in drilling efficiency.

[0005] The present invention provides a high-frequency pile-drilling and pile-forming system, which includes a guiding sleeve and a drill bit. The drill bit includes a head and a guiding part. The guiding part is located inside the guiding sleeve. One axial end of the guiding part is connected to the head, and the other end is connected to a high-frequency vibrating robotic arm on a pile-driving machine. The outer sidewall of the guiding part is adapted to axially move in cooperation with the inner wall of the guiding sleeve. The head extends downward outside the guiding sleeve for tunneling. The head is in an inverted V shape formed by symmetrically connecting two plates. One end of the head away from the guiding part is a tip, and this tip is a straight and long impact edge. The axis of the guiding sleeve intersects with the impact edge. The impact edge is adapted to high-frequency impact on soil or rock. Milling cutter discs are provided on two symmetric outer side surfaces of the head. A transmission mechanism is provided inside the head and is adapted to drive the milling cutter discs to rotate. Cutting edges are provided at both side ends of the head along the length direction of the impact edge. The cutting edges are adapted to cut soil when rotating around the axis of the guiding sleeve. The guiding part is in a cylindrical shape with both ends penetrating. A discharge port is formed by the side end of the head and the end of the guiding part. The discharge port is used to discharge the shredded soil and milled rock through the inside of the guiding part. A drive shaft is provided inside the guiding part. One end of the drive shaft is connected to a rotary driver on the robotic arm, and the other end is connected to the transmission mechanism through a clutch. Two engaging positions for the robotic arm to grasp are axially spaced along the drive shaft on the rotary driver. Among them, the engaging position close to the drill bit is adapted for the drive shaft to engage with the transmission mechanism, and the engaging position far from the drill bit is adapted for the drive shaft to disengage from the transmission mechanism. A clamping mechanism is provided inside the head. The clamping mechanism is adapted to clamp the drive shaft when the drive shaft disengages from the transmission mechanism.

[0006] Optionally, the head includes two knife plates with the same size and symmetrically connected. Among the two side edges of the side end face of the knife plate, the inner side edge protrudes more along the length direction of the impact edge than the outer side edge.

[0007] Optionally, both side edges of the side end face of the knife plate are arc-shaped, and are integrally connected to the guiding part at the lowest point of the arc.

[0008] Optionally, a gear ring is rotatably connected to the knife plate, and a plurality of the milling cutter discs are spaced around the gear ring. The circumferential side of the milling cutter disc is meshed with the gear ring through teeth. The transmission mechanism includes a rotating shaft and a bevel gear angle transmission mechanism. One end of the rotating shaft is coaxially and fixedly connected to the gear ring. The other end of the rotating shaft is connected to the bevel gear angle transmission mechanism. The bevel gear angle transmission mechanism includes a driving bevel gear and a driven bevel gear. A holding mechanism for maintaining the rotating position of the driving bevel gear is provided inside the head. The driving bevel gear is coaxially arranged with the drive shaft. A clutch is provided between the driving bevel gear and the end of the drive shaft. The driven bevel gear is coaxially and fixedly connected to the rotating shaft.

[0009] Optionally, the clutch includes a first friction plate and a second friction plate. The first friction plate is fixed to one side of the driving bevel gear facing the drive shaft, and the second friction plate is fixed to the end of the drive shaft.

[0010] Optionally, reinforcing rib plates are provided inside the head. Two ends of each reinforcing rib plate are integrally connected to the two knife plates respectively. The holding mechanism is arranged on the reinforcing rib plate, and the drive shaft passes through the reinforcing rib plate to connect to the driving bevel gear.

[0011] Optionally, dust-proof enclosing plates are provided on both sides of the reinforcing rib plate inside the head. The reinforcing rib plate and the dust-proof rib plates enclose a closed dust-proof space, and the transmission mechanism is located in the dust-proof space.

[0012] Optionally, the clamping mechanism includes remotely controlled electric telescopic rods symmetrically arranged on both sides of the drive shaft. The remotely controlled electric telescopic rods are fixedly connected to the inside of the head. The remotely controlled electric telescopic rods are drivingly connected to a pressing plate. A flat surface for the pressing plate to press against is provided on the side wall of the drive shaft. The pressing plate is adapted to move away from the drive shaft when the drive shaft is combined with the transmission mechanism, for driving the milling cutter disc to rotate; the pressing plate is also adapted to clamp the drive shaft when the drive shaft is separated from the transmission mechanism, for driving the drill bit to rotate.

[0013] Optionally, the orthographic projection of the drill bit along the axial direction of the guiding sleeve is entirely within the contour range of the inner wall of the guiding sleeve.

[0014] Optionally, a reinforcing block is provided inside the head. The reinforcing block is in the shape of a triangular prism, and its side surfaces are adhesively connected to the inner side walls of the two knife plates integrally.

[0015] The technical solution of the present invention has the following advantages:

[0016] When the drill bit encounters soft soil, the drive shaft and the transmission mechanism are in a separated state, and the clamping mechanism clamps the drive shaft to make the drill bit relatively fixed to the drive shaft. At this time, the drive shaft drives the drill bit to rotate, and the cutting edges on both sides of the head of the drill bit rotate to cut the soft soil. When the drill bit encounters bedrock, the clamping mechanism releases the drive shaft, and the drive shaft feeds a certain distance to be combined with the transmission mechanism, so that the drive shaft drives the milling cutter disc to rotate through the transmission mechanism, and the milling cutters on the milling cutter disc mill the bedrock. While the cutting edges rotate to cut the soft soil or the milling cutters mill the bedrock, the mechanical arm with high-frequency vibration on the pile driving machine drives the drill bit to vibrate synchronously, so that the impact edge at the top of the drill bit impacts the soft soil or the bedrock, having the effects of pressing the soft soil to deform and forcing the soft soil to be squeezed towards the cutting edge, and breaking the surface of the bedrock or even cracking the whole bedrock block, thereby improving the milling efficiency. Description of the Drawings

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0018] Figure 1 is a perspective view of the pile foundation high-frequency drilling and pile-forming system in the embodiment of the present invention.

[0019] Figure 2 is a side view of the pile foundation high-frequency drilling and pile-forming system in the embodiment of the present invention.

[0020] Figure 3 is Figure 2 a structural schematic diagram after hiding the dust-proof enclosure.

[0021] Figure 4 is a connection schematic diagram of the drive shaft, clutch and driving bevel gear in the embodiment of the present invention.

[0022] Figure 5 is a front view of the pile foundation high-frequency drilling and pile-forming system in the embodiment of the present invention.

[0023] Figure 6 is a connection schematic diagram of the gear ring and the rotating shaft in the embodiment of the present invention.

[0024] Figure 7 is a connection schematic diagram of the reinforcing rib plate and the driving bevel gear in the embodiment of the present invention.

[0025] Figure 8 is a top view of the pile foundation high-frequency drilling and pile-forming system in the embodiment of the present invention.

[0026] In the figure: guiding sleeve 1, drill bit 2, head 21, cutter plate 21a, impact edge 211, cutting edge 212, discharge port 213, narrow angle 214, circular groove 215, guiding part 22, drive shaft 3, plane 31, milling cutter head 4, transmission mechanism 5, bevel gear angle transmission mechanism 51, driving bevel gear 511, annular groove 5111, driven bevel gear 512, rotating shaft 52, clamping mechanism 6, remote control electric telescopic rod 61, pressing plate 62, gear ring 7, clutch 8, first friction plate 81, second friction plate 82, reinforcing rib plate 9, circular hole 91, reinforcing block 10, holding mechanism 11, circular groove 111, annular lip 112, dust-proof enclosure 12, dust-proof space 13, bottom sealing plate 14;

[0027] Rotary drive 100, engagement position 101. Detailed implementation manners

[0028] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the description of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0029] Unless otherwise clearly defined and limited, terms such as "set", "installed", "connected", etc. 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. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is usually placed during use. It is only for the convenience of description and simplification of 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 should not be construed as a limitation of the present invention.

[0031] Terms such as "first", "second", "third", etc. are only used to distinguish elements with similar attributes, rather than indicating or implying relative importance or a specific order.

[0032] The term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to the listed elements, it may also include other elements not specifically listed.

[0033] Please refer to Figure 1 According to the embodiments of the present invention, a high-frequency pile-drilling and pile-forming system for pile foundations is provided, which includes a guiding sleeve 1, a drill bit 2, a driving shaft 3, a robotic arm on a pile-driving machine, and a rotary drive 100 located on the robotic arm.

[0034] The drill bit 2 includes a head 21 and a guiding part 22. The guiding part 22 is located inside the guiding sleeve 1. Both the guiding sleeve 1 and the guiding part 22 are preferably cylinders with openings at both ends. One axial end of the guiding part 22 is integrally connected with the head 21, and the other end is connected to the robotic arm with high-frequency vibration on the pile driving machine. The outer side wall of the guiding part 22 is adapted to move axially in cooperation with the inner wall of the guiding sleeve 1. One end of the guiding sleeve 1 away from the head 21 is actually also connected to the robotic arm, but it is connected to the non-vibrating part of the robotic arm, while the guiding part 22 of the drill bit 2 is connected to the vibrating part of the robotic arm. Therefore, the robotic arm drives the guiding part 22 and the head 21 to vibrate axially at high frequency along the axis of the guiding sleeve 1, and there is an axial short-distance relative displacement between the drill bit 2 and the guiding sleeve 1 during vibration.

[0035] The head 21 extends downward out of the guiding sleeve 1 for tunneling. The head 21 is formed by symmetrically connecting two plates to form a V shape. One end of the head 21 away from the guiding part 22 is a tip, and this tip is a straight and long impact edge 211. The axis of the guiding sleeve 1 passes through the cutting edge line of the impact edge 211, and the axis intersects the cutting edge line. The impact edge 211 is used for high-frequency impact on soil or rock.

[0036] Please refer to Figure 2 and Figure 3 , a plurality of milling cutter discs 4 are provided on two symmetric outer side surfaces of the head 21, and a transmission mechanism 5 is provided inside the head 21. The power of the driving shaft 3 is transmitted to the transmission mechanism 5 through the driving shaft 3, and the milling cutter discs 4 are driven to rotate through the transmission mechanism 5.

[0037] Please refer to Figure 1 , cutting edges 212 are formed on both side end faces of the head 21 along the length direction of the impact edge 211. When the cutting edges 212 follow the head 21 to rotate around the axis of the guiding sleeve 1, the cutting edges 212 can cut the soil. The side end of the head 21 and the end of the guiding part 22 enclose a discharge port 213. The discharge port 213 is communicated with the inside of the guiding part 22. The discharge port 213 is used to discharge the chopped soil and milled rock through the inside of the guiding part 22, which can be realized by setting a conduit inside the guiding part 22 in the form of negative pressure suction.

[0038] Please refer to Figure 1 , a driving shaft 3 is provided inside the guiding part 22. The driving shaft 3 is located at the central axis of the guiding part 22. One end of the driving shaft 3 is connected to the rotary drive 100 on the robotic arm. The rotary drive 100 is, for example, a motor. The other end of the driving shaft 3 is connected to the transmission mechanism 5 through a clutch 8 (see Figure 4 ); two engaging positions 101 for the robotic arm to grab are provided at intervals along the axial direction of the driving shaft 3 on the housing of the rotary drive 100. One of the engaging positions 101 is closer to the drill bit 2, and this engaging position 101 is suitable for the driving shaft 3 to be engaged with the transmission mechanism 5. The engaging position 101 farther from the drill bit 2 is suitable for the drive to be separated from the transmission mechanism 5.

[0039] Please refer to Figure 3 , a clamping mechanism 6 is further provided inside the head 21. The clamping mechanism 6 is adapted to clamp the drive shaft 3 when the drive shaft 3 is separated from the transmission mechanism 5. Specifically, the clamping mechanism 6 includes a pair of remotely controlled electric telescopic rods 61, symmetrically arranged on both sides of the drive shaft 3, and the remotely controlled electric telescopic rods 61 are fixed to the inside of the head 21; a pressing plate 62 is vertically and fixedly connected to the piston rod of the remotely controlled electric telescopic rod 61. There are two symmetrically arranged planes 31 near the shaft end on the side wall of the drive shaft 3, and the plane 31 is perpendicular to the piston rod. When the piston rod extends, the pressing plate 62 is tightly pressed against the plane 31 flatly. The two pressing plates 62 move synchronously, so as to clamp or release the drive shaft 3; the pressing plate 62 is adapted to move away from the drive shaft 3 when the drive shaft 3 is combined with the transmission mechanism 5, that is, to release the drive shaft 3. At this time, the drive shaft 3 drives the milling cutter disc 4 to rotate through the transmission mechanism 5; the pressing plate 62 is also adapted to clamp the drive shaft 3 when the drive shaft 3 is separated from the transmission mechanism 5. At this time, the drive shaft 3 drives the drill bit 2 to rotate.

[0040] Please refer to Figure 3 and Figure 4 , the pile foundation high-frequency drilling and pile-forming system proposed in the embodiment of the present invention has the following advantages: when the drill bit 2 encounters soft soil, the drive shaft 3 and the transmission mechanism 5 are in a separated state, and the clamping mechanism 6 clamps the drive shaft 3 to make the drill bit 2 and the drive shaft 3 relatively fixed. At this time, the drive shaft 3 drives the drill bit 2 to rotate, and the cutting edges 212 on both sides of the head 21 rotate to cut the soft soil; when the drill bit 2 encounters bedrock, the clamping mechanism 6 releases the drive shaft 3, and the drive shaft 3 feeds a certain distance to be combined with the transmission mechanism 5, so that the drive shaft 3 drives the milling cutter disc 4 to rotate through the transmission mechanism 5, and the milling cutter on the milling cutter disc 4 mills the bedrock; while the cutting edge 212 rotates to cut the soft soil or the milling cutter mills the bedrock, the high-frequency vibrating robotic arm on the pile driving machine drives the drill bit 2 to vibrate synchronously, so that the impact edge 211 at the top of the drill bit 2 impacts the soft soil or bedrock, which has the effects of pressing the soft soil to deform and forcing the soft soil to be squeezed towards the cutting edge 212, and smashing the surface of the bedrock or even cracking the whole bedrock, thereby improving the milling efficiency.

[0041] Please refer to Figure 1 , specifically, the head 21 is integrally formed by two knife plates 21a with the same size and symmetrically arranged. The knife plates 21a are made of high-hardness plates, such as tungsten steel plates; the bottom ends of the two knife plates 21a are integrally connected to the guiding part 22, and the tops of the two knife plates 21a far from the guiding part 22 are connected. The above-mentioned impact edge 211 is located at the connection of the two knife plates 21a; please refer to Figure 5 , among the two side edges of the side end face of the knife plate 21a, the inner edge is more convex along the length direction of the impact edge 211 than the outer side edge, so that the side end face of the knife plate 21a forms the above-mentioned cutting edge 212; the two side edges of the side end face of the knife plate 21a are both arc-shaped, and are integrally connected to the guiding part 22 at the lowest point of the arc. Please refer to Figure 1, this design facilitates the squeezing of soft soil into the above-mentioned discharge port 213 at the narrow angle 214 formed by the bottom of the arc-shaped cutting edge 212 (i.e., the part of the cutting edge 212 close to the guiding part 22) and the end face of the guiding part 22 when the drill bit 2 rotates, so that the soft soil can be efficiently cut by the cutting edge 212.

[0042] Please refer to Figure 6 , a gear ring 7 is rotatably connected to the cutter plate 21a ( Figure 5 The position of the gear ring 7 is marked by a dotted line in Figure 5 , actually, the gear ring 7 is not visible on the outer surface of the cutter plate 21a). Specifically, please refer to

[0043] Please refer to Figure 3 and Figure 4 , specifically, the transmission mechanism 5 includes a rotating shaft 52 and a bevel gear angle transmission mechanism 51. One end of the rotating shaft 52 is coaxially and fixedly connected to the gear ring 7, and the other end of the rotating shaft 52 is connected to the bevel gear angle transmission mechanism 51; the bevel gear angle transmission mechanism 51 includes a driving bevel gear 511 and a driven bevel gear 512. A holding mechanism 11 for maintaining the rotating position of the driving bevel gear 511 is provided inside the head 21 (for details, see Figure 7 ), the driving bevel gear 511 is coaxially arranged with the driving shaft 3, and a clutch 8 is provided between the end of the driving bevel gear 511 and the driving shaft 3 (see Figure 4 ), and the driven bevel gear 512 is coaxially and fixedly connected to the rotating shaft 52.

[0044] Please refer to Figure 3 , further, a reinforcing rib plate 9 is provided inside the head 21. Both ends of the reinforcing rib plate 9 are integrally connected to the two cutter plates 21a respectively. The reinforcing rib plate 9 is preferably perpendicular to the axis of the driving shaft 3, and the driving shaft 3 is directly opposite to the center of the reinforcing rib plate 9; a reinforcing block 10 is also provided inside the head 21. The reinforcing block 10 is in the shape of a triangular prism, and two side surfaces of the reinforcing block 10 are respectively attached to the inner side walls of the two cutter plates 21a and are integrally connected.

[0045] Please refer to Figure 3 specifically, the above-mentioned remote control electric telescopic rod 61 is fixedly arranged on the side of the reinforcing rib plate 9 facing the driving shaft 3, a dust-proof space 13 is arranged on the side of the reinforcing rib plate 9 facing away from the driving shaft, and the transmission mechanism 5 is located in the closed dust-proof space 13. Please refer to Figure 2, the dust-proof space 13 is surrounded by the reinforcing rib plate 9 and the dust-proof enclosing plates 12 on both sides thereof, and the dust-proof space 13 has the effect of preventing solid foreign matters from interfering with the operation of the transmission mechanism 5; a bottom sealing plate 14 is further provided on the side of the reinforcing rib plate 9 facing the drive shaft 3, and the bottom sealing plate 14 is seamlessly connected to the bottom of the dust-proof enclosing plate 12 and the inner side wall of the cutter plate 21a, and the bottom sealing plate 14 also closely adheres to the lower surface of the pressing plate 62. When the pressing plate 62 moves, part of its surface always adheres to the upper surface of the bottom sealing plate 14, so as to achieve the effect of preventing solid foreign matters from interfering with the normal operation of the remote control electric telescopic rod 61.

[0046] Please refer to Figure 3 , the above-mentioned transmission mechanism 5 is arranged in the inner space of the head 21 between the reinforcing block 10 and the reinforcing rib plate 9, and the above-mentioned holding mechanism 11 is arranged on the reinforcing rib plate 9; please refer to Figure 7 , the holding mechanism 11 preferably has a circular groove 111 with an annular lip 112. The driving bevel gear 511 is fitted into the circular groove 111 and can rotate in the circular groove 111. An annular groove 5111 (see Figure 4 ) is provided on the circumferential side of the driving bevel gear 511 for the annular lip 112 to be snapped into; a concentric circular hole 91 is provided at the bottom of the circular groove 111, and the drive shaft 3 passes through the circular hole and is connected to the driving bevel gear 511 through a clutch 8 (see Figure 4 ).

[0047] Please refer to Figure 4 , the clutch 8 includes a first friction plate 81 and a second friction plate 82. The first friction plate 81 is fixed on the side of the driving bevel gear 511 facing the drive shaft 3, and the second friction plate 82 is fixed at the end of the drive shaft 3. When the binding position 101 on the housing of the rotary actuator 100 grasped by the robotic arm changes and the drive shaft 3 feeds forward, the second friction plate 82 on the drive shaft 3 presses the first friction plate 81 on the driving bevel gear 511, so that the driving bevel gear 511 rotates synchronously with the drive shaft 3.

[0048] Please refer to Figure 8 , further, the orthographic projection of the drill bit 2 along the axis of the guide sleeve 1 completely falls within the contour range of the inner wall of the guide sleeve 1. This design enables the head 21 to be retracted into the guide sleeve 1; please combine Figure 8 and Figure 1 , if it is necessary to quickly remove the soil and gravel accumulated inside the guiding part 22, the robotic arm can be operated to retract the guiding part 22 into the guide sleeve 1. The guide sleeve 1 closes the discharge port 213 to prevent the soil and gravel from leaking out. At this time, the guide sleeve and the guiding part 22 can be lifted out of the pile hole together so as to quickly empty the internal contents of the guiding part 22 on the ground.

[0049] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A high-frequency pile foundation drilling and pile forming system, characterized in that, It includes a guiding sleeve and a drill bit. The drill bit includes a head and a guiding part. The guiding part is located inside the guiding sleeve. One axial end of the guiding part is connected to the head, and the other end is connected to a robotic arm with high-frequency vibration on a pile driving machine. The outer sidewall of the guiding part is adapted to axially move in cooperation with the inner wall of the guiding sleeve. The head extends downward out of the guiding sleeve for tunneling. The head is in an inverted V shape formed by symmetrically connecting two plates. One end of the head away from the guiding part is a tip, and this tip is a straight and long impact edge. The axis of the guiding sleeve intersects with the impact edge. The impact edge is adapted to high-frequency impact on soil or rock. Milling cutter discs are provided on two symmetric outer side surfaces of the head. A transmission mechanism is provided inside the head and is adapted to drive the milling cutter discs to rotate. Cutting edges are provided at both side ends of the head along the length direction of the impact edge. The cutting edges are adapted to cut soil when rotating around the axis of the guiding sleeve. The guiding part is in a cylindrical shape with both ends penetrating. The side end of the head and the end of the guiding part enclose a discharge port. The discharge port is used to discharge the shredded soil and milled rock through the inside of the guiding part. A driving shaft is provided inside the guiding part. One end of the driving shaft is connected to a rotary driver on the robotic arm, and the other end is connected to the transmission mechanism through a clutch. Two engaging positions for the robotic arm to grasp are provided at intervals along the axial direction of the driving shaft on the rotary driver. Among them, the engaging position close to the drill bit is adapted for the driving shaft to engage with the transmission mechanism, and the engaging position far from the drill bit is adapted for the driving shaft to disengage from the transmission mechanism. A clamping mechanism is provided inside the head. The clamping mechanism is adapted to clamp the driving shaft when the driving shaft disengages from the transmission mechanism.

2. The pile foundation high-frequency drilling and pile-forming system according to claim 1, characterized in that, The head includes two knife plates with the same size and symmetric connection. Among the two side edges of the side end face of the knife plate, the inner side edge protrudes more along the length direction of the impact edge than the outer side edge.

3. The pile foundation high-frequency drilling and pile forming system according to claim 2, wherein Both side edges of the side end face of the knife plate are arc-shaped and are integrally connected to the guiding part at the lowest point of the arc.

4. The pile foundation high-frequency drilling and pile forming system according to claim 2, wherein, A toothed ring is rotatably connected to the knife plate, and a plurality of the milling cutter discs are arranged at intervals around the toothed ring. The circumferential side of the milling cutter disc is meshed with the toothed ring through teeth. The transmission mechanism includes a rotating shaft and a bevel gear angle transmission mechanism. One end of the rotating shaft is coaxially and fixedly connected to the toothed ring. The other end of the rotating shaft is connected to the bevel gear angle transmission mechanism. The bevel gear angle transmission mechanism includes a driving bevel gear and a driven bevel gear. A holding mechanism for maintaining the rotating position of the driving bevel gear is provided inside the head. The driving bevel gear is coaxially arranged with the driving shaft. A clutch is provided between the driving bevel gear and the end of the driving shaft. The driven bevel gear is coaxially and fixedly connected to the rotating shaft.

5. The pile foundation high-frequency drilling and pile forming system according to claim 4, wherein The clutch includes a first friction plate and a second friction plate. The first friction plate is fixed to the side of the driving bevel gear facing the driving shaft, and the second friction plate is fixed to the end of the driving shaft.

6. The pile foundation high-frequency drilling and pile forming system according to claim 5, wherein, The inner side of the head is provided with reinforcing rib plates, both ends of the reinforcing rib plates are integrally connected with the two cutter plates respectively, the holding mechanism is arranged on the reinforcing rib plates, and the driving shaft passes through the reinforcing rib plates to connect the driving bevel gear.

7. The pile foundation high-frequency drilling and pile forming system according to claim 6, characterized in that, Dust-proof enclosing plates are arranged on both sides of the reinforcing rib plates on the inner side of the head. The reinforcing rib plates and the dust-proof rib plates enclose a closed dust-proof space, and the transmission mechanism is located in the dust-proof space.

8. The pile foundation high-frequency drilling and pile forming system according to claim 1, characterized in that, The clamping mechanism includes remotely controlled electric telescopic rods symmetrically arranged on both sides of the driving shaft. The remotely controlled electric telescopic rods are fixedly connected with the inner side of the head. The remotely controlled electric telescopic rods are drivingly connected with pressing plates. A plane for the pressing plates to press against is arranged on the side wall of the driving shaft. The pressing plates are adapted to move away from the driving shaft when the driving shaft is combined with the transmission mechanism for driving the milling cutter disc to rotate. The pressing plates are also adapted to clamp the driving shaft when the driving shaft is separated from the transmission mechanism for driving the drill bit to rotate.

9. The pile foundation high-frequency drilling and pile forming system according to claim 1, characterized in that, The orthographic projection of the drill bit along the axial direction of the guiding sleeve is entirely within the contour range of the inner wall of the guiding sleeve.

10. The pile foundation high-frequency drilling and pile forming system according to claim 2, wherein Reinforcing blocks are arranged on the inner side of the head. The reinforcing blocks are in the shape of triangular prisms, and the side surfaces are integrally attached to the inner side walls of the two cutter plates.

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