Efficient pile head breaking device with low disturbance to steel bars and automatic construction method

Abstract

The invention relates to the technical field of cast-in-place pile construction, and discloses an efficient pile head breaking device with low disturbance on reinforcing steel bars and an automatic construction method.The efficient pile head breaking device comprises a rotary telescopic structure, a pile head breaking structure, a pile head breaking structure and a pile head breaking structure, and the rotary telescopic structure is provided with a rotary connecting column and a telescopic connecting column in the rotary connecting column; the rotating steel walls are arranged on the outer side of the rotating connecting column in the circumferential direction and arranged on the outer side face of the rotating telescopic structure in a telescopic mode in the radial direction through hydraulic telescopic assemblies, and a plurality of lateral steel cones are arranged on the inner surfaces of the rotating steel walls; the center area of the cast-in-place pile head is crushed through the drill bit, the outer side area of the cast-in-place pile head is crushed through the rotary steel walls through the lateral steel cone and the annular cutting drill bit, the multiple rotary steel walls are shrunk inwards through the hydraulic telescopic assembly after crushing, the crushed cast-in-place pile head is extruded inwards, and finally the cast-in-place pile head is broken and removed. The whole process is automatically completed through mechanical equipment, the safety of operators can be guaranteed, and the pile head breaking efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cast-in-place pile construction, and in particular to a high-efficiency pile head breaking device with low disturbance to steel bars and an automated construction method. Background Art

[0002] In the field of civil engineering, bored piles, as an important infrastructure, are widely used in high-rise buildings, bridges, and other large-scale projects. As an important component of the foundation, they play a role in bearing loads and enhancing foundation strength. When pouring concrete into bored piles, the pile top elevation should be 0.8-1.0m higher than the designed pile top elevation. This is mainly to compensate for the shrinkage and settlement of the concrete that may occur during the curing process, and to prevent the inclusion of sediment caused by the influence of the mud retaining wall, thereby ensuring the quality of the bored piles. During subsequent construction, the concrete that is higher than the designed elevation of the bored pile needs to be broken. The process of breaking this part of the pile head concrete is called "breaking the pile head."

[0003] Currently, the most commonly used methods for breaking pile heads include manual breaking and hydraulic pile breaker breaking. Manual breaking mainly relies on manually operated jackhammers. When the pile strength or cross-sectional size is large, the breaking efficiency is extremely low, and the high-intensity repetitive labor can easily lead to fatigue accumulation. The breaking process is accompanied by noise and dust pollution, posing a threat to the environment and the health of the operators. In addition, manual breaking is highly dependent on the proficiency of the operator. Inadequate skills may result in incomplete breaking of the pile head or partial damage to the foundation pile structure, increasing the hidden dangers of subsequent construction. Hydraulic pile breakers have a large impact force. If the force is not properly controlled, it may damage the pile reinforcement and concrete, affecting the bearing capacity of the cast-in-place pile. In addition, the use of hydraulic pile breakers is restricted in certain soft soils or specific geological conditions.

[0004] In view of this, how to provide a new type of pile head breaking device that can improve the applicability and construction efficiency of the equipment, improve the degree of automation, and at the same time ensure the safety of construction workers and avoid environmental pollution is a problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-efficiency pile head breaking device with low disturbance to steel bars and an automated construction method, so as to solve the problems existing in the prior art.

[0006] To achieve the above object, the present invention provides a high-efficiency pile head breaking device with low disturbance to steel bars, comprising:

[0007] The rotary telescopic structure comprises a rotary connecting column and a telescopic connecting column inside the rotary connecting column. A drill bit is provided at the lower end of the telescopic connecting column. The rotary telescopic structure drives the drill bit to rotate via the rotary connecting column and drives the drill bit to move up and down via the telescopic connecting column.

[0008] A plurality of rotating steel walls are arranged circumferentially on the outside of the rotating connecting column and are radially telescopically arranged on the outer surface of the rotating telescopic structure through a hydraulic telescopic assembly. When the plurality of rotating steel walls are radially contracted inward, they can clamp the cast-in-place pile heads. The rotating telescopic structure drives the plurality of rotating steel walls to rotate through the rotating connecting column. The inner surface of the rotating steel wall is provided with a plurality of lateral steel cones.

[0009] The connecting mechanism is arranged on the top of the rotating and telescopic structure and is used for connecting to an excavator.

[0010] Furthermore, a plurality of lateral auxiliary positioning columns are provided on the inner surface of the rotating steel wall along the longitudinal direction, and the lateral steel cones are located between adjacent lateral auxiliary positioning columns.

[0011] Furthermore, a circular cutting telescopic drill bit is provided on the lower edge of the rotating steel wall, and a plurality of circular cutting drill bits form a cutting ring, and the drill bit can extend downward from the middle of the cutting ring.

[0012] Furthermore, a contact sensor is provided at the bottom of the drill bit, and a steel bar scanner is provided on the inner surface of the rotating steel wall. Both the contact sensor and the steel bar scanner are communicatively connected to a remote control system.

[0013] Furthermore, it also includes:

[0014] The airbag is placed on the outer side of the steel bar and close to the top of the steel bar;

[0015] The PVE tube is sleeved on the outer surface of the airbag. The top of the airbag is provided with inflation and deflation holes. The top of the PVE tube is provided with operation holes corresponding to the inflation and deflation holes.

[0016] Furthermore, the hydraulic telescopic assembly includes:

[0017] A mounting ring, sleeved on the outer side of the rotating connecting column;

[0018] A plurality of hydraulic cylinders are circumferentially arranged on the mounting ring and correspond one to one with the plurality of rotating steel walls. The hydraulic rods of the hydraulic cylinders are connected to the rotating steel walls, and the rotating steel walls are fan-shaped.

[0019] Furthermore, the connecting mechanism includes:

[0020] A connecting plate, the bottom of which is connected to the top of the rotating and telescopic structure through a connecting piece, and a connecting hole for connecting to the excavator is provided on the connecting plate.

[0021] Furthermore, it also includes:

[0022] A spray mechanism, provided on the inner surface of the rotating steel wall, for spraying water onto the bored piles;

[0023] A water storage tank is arranged on the inner surface of the rotating steel wall and is used to supply water to the spraying mechanism.

[0024] Furthermore, it also includes:

[0025] The spiral discharge device is rotatably arranged on the upper surface of the drill bit, and the spiral discharge device is transmission-connected to the rotary connecting column through a gear assembly.

[0026] The present invention also provides an automated construction method for efficiently breaking pile heads with low disturbance to steel bars, and the method employs the efficient pile head breaking device with low disturbance to steel bars, comprising the following steps:

[0027] S1: An airbag is sheathed on the outer side of the steel bar, the airbag is set close to the top of the steel bar, and a PVE tube is sheathed on the outer surface of the airbag. The airbag is inflated through the inflation and deflation holes until the airbag expands and fills the inner cavity of the PVE tube. Concrete is poured on the steel bar to form a cast-in-place pile head on the top of the steel bar. The airbag is deflated through the inflation and deflation holes.

[0028] S2: Connecting the rotating telescopic structure and the excavator, moving the high-efficiency pile head breaking device with low disturbance to the top of the cast-in-place pile head by the excavator; moving the high-efficiency pile head breaking device with low disturbance to the cast-in-place pile head from top to bottom, so that the cast-in-place pile head enters the inner side of the plurality of rotating steel walls, the cast-in-place pile head and the inner side of the rotating steel wall are spaced apart, scanning the cast-in-place pile head by a steel bar scanner, and uploading the scanned data to the remote control system;

[0029] S3: The multiple rotating steel walls are retracted inwards through the hydraulic telescopic assembly until the multiple rotating steel walls clamp the pile head; the drill bit is driven downwards through the telescopic connecting column until the contact sensor at the bottom of the drill bit contacts the pile head and sends a signal to the remote control system; the drill bit and the multiple rotating steel walls are rotated by rotating the connecting column, the drill bit crushes the central area of the pile head, and the rotating steel walls crush the outer area of the pile head through the lateral steel cone and the ring-cutting drill bit;

[0030] S4: The drill bit keeps rotating and continues to move downwards through the telescopic connecting column until it reaches the preset position of the cast-in-place pile head;

[0031] S5: The multiple rotating steel walls are retracted inwards through the hydraulic telescopic assembly to squeeze the broken cast-in-place pile heads inwards to break the cast-in-place pile heads.

[0032] The present invention discloses the following technical effects:

[0033] 1. The central area of the bored pile head is crushed by the drill bit, and the outer area of the bored pile head is crushed by the rotating steel wall through the lateral steel cone and the ring-cutting drill bit. After crushing, multiple rotating steel walls are retracted inward by the hydraulic telescopic assembly to squeeze the crushed bored pile head inward, and finally the bored pile head is broken. Compared with the existing technology, the entire process is completed automatically by mechanical equipment, which can ensure the safety of the operator and improve the efficiency of pile head breaking.

[0034] 2. The entire process of breaking the pile head occurs within multiple rotating steel walls, which can prevent dust pollution, reduce crushing noise, and improve the environmental friendliness of construction. In addition, the hydraulic telescopic assembly can also drive the rotating steel wall to clamp the bored pile head, which is suitable for bored pile heads of various sizes and can be used under specific geological conditions such as soft soil. It has good application prospects and a wide range of applications.

[0035] 3. The present invention is provided with a spraying mechanism on the inner side of the rotating steel wall, and dust can be precipitated by spraying water mist during the breaking process of the bored pile head, thereby further reducing dust pollution.

[0036] 4. Before pouring the bored pile, air bags and PVE tubes are arranged on the outside of the steel bars. After pouring, the air bags are deflated to form a gap between the steel bars and the PVE tubes. During the removal of the bored pile head, this gap can be used to isolate the steel bars from damage, thereby ensuring the bearing capacity of the bored pile.

[0037] 5. The position of the drill bit is monitored in real time through the contact sensor, and the pile head is scanned by the steel bar scanner. Combined with the remote control system, the clamping position of the rotating steel wall and the drilling position of the drill bit can be accurately controlled to improve the accuracy of breaking the pile head and avoid incomplete breaking of the pile head or local damage to the pile foundation structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 It is a schematic diagram of the structure of the present invention;

[0040] Figure 2 Layout diagram of the airbag and PVE tube;

[0041] Figure 3 Schematic diagram of the internal structure of the present invention;

[0042] Figure 4 It is a schematic diagram of the local structure of the rotating steel wall;

[0043] Figure 5 Schematic diagram of the drill bit;

[0044] Among them, 1. Airbag; 2. PVE tube; 3. Connecting mechanism; 4. Rotating telescopic structure; 5. Spraying mechanism; 6. Water tank; 7. Hydraulic telescopic assembly; 8. Rotating steel wall; 9. Lateral steel cone; 10. Lateral auxiliary positioning column; 11. Gear assembly; 12. Spiral discharge device; 13. Diamond cone; 14. Drill bit; 15. Circular cutting drill bit; 16. Contact sensor; 17. Rebar scanner; 18. Remote control system. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] The embodiment of the present invention provides a high-efficiency pile head breaking device with low disturbance to steel bars, comprising:

[0048] The rotating and telescopic structure 4 has a rotating connecting column and a telescopic connecting column inside the rotating connecting column. A drill bit 14 is provided at the lower end of the telescopic connecting column. The rotating and telescopic structure 4 drives the drill bit 14 to rotate through the rotating connecting column, and drives the drill bit 14 to move up and down through the telescopic connecting column. It should be noted that the specific driving structure and driving principle of the rotating and telescopic structure 4 belong to the existing technology and will not be described here. In some other embodiments, the rotating and telescopic structure 4 can also be replaced by other existing equipment, as long as it can ensure that the rotating steel wall 8 and the drill bit 14 can be driven to rotate at the same time and the drill bit 14 can be driven to move up and down independently. The overall up and down movement of the drill bit 14 and the rotating steel wall 8 is achieved by the excavator.

[0049] A plurality of rotating steel walls 8 are arranged circumferentially on the outside of the rotating connecting column and are radially telescopically arranged on the outer surface of the rotating telescopic structure 4 through a hydraulic telescopic assembly 7. When the plurality of rotating steel walls 8 are radially contracted inward, they can clamp the cast-in-place pile heads. The rotating telescopic structure 4 drives the plurality of rotating steel walls 8 to rotate through the rotating connecting column. The inner surface of the rotating steel wall 8 is provided with a plurality of lateral steel cones 9;

[0050] The connecting mechanism 3 is arranged on the top of the rotating and telescopic structure 4 and is used for connecting to the excavator.

[0051] In this embodiment, a plurality of lateral auxiliary positioning columns 10 are provided along the longitudinal direction on the inner surface of the rotating steel wall 8 , and the lateral steel cones 9 are located between adjacent lateral auxiliary positioning columns 10 .

[0052] In this embodiment, a circular cutting telescopic drill bit 14 is provided on the lower edge of the rotating steel wall 8. A plurality of circular cutting drill bits 15 form a cutting ring, and the drill bit 14 can extend downward from the middle of the cutting ring.

[0053] In this embodiment, a diamond cone 13 and a contact sensor 16 are provided at the bottom of the drill bit 14 , and a steel bar scanner 17 is provided on the inner surface of the rotating steel wall 8 . Both the contact sensor 16 and the steel bar scanner 17 are communicatively connected to a remote control system 18 .

[0054] In this embodiment, it also includes:

[0055] The airbag 1 is placed on the outer side of the steel bar and close to the top of the steel bar;

[0056] The PVE tube 2 is sleeved on the outer surface of the airbag 1. The top of the airbag 1 is provided with inflation and deflation holes. The top of the PVE tube 2 is provided with operation holes corresponding to the inflation and deflation holes.

[0057] In this embodiment, the hydraulic telescopic assembly 7 includes:

[0058] A mounting ring is sleeved on the outer side of the rotating connecting column;

[0059] Multiple hydraulic cylinders are circumferentially arranged on the mounting ring and correspond one-to-one to multiple rotating steel walls 8. The hydraulic rods of the hydraulic cylinders are connected to the rotating steel walls 8. The rotating steel walls 8 are fan-shaped. In this embodiment, four are provided. The four rotating steel walls 8 can form a cylindrical ring structure.

[0060] In this embodiment, the connecting mechanism 3 includes:

[0061] The connecting plate has its bottom connected to the top of the rotating telescopic structure 4 through a connecting piece, and a connecting hole for connecting to the excavator is provided on the connecting plate.

[0062] In this embodiment, it also includes:

[0063] The spray mechanism 5 is provided on the inner surface of the rotating steel wall 8 and is used to spray water onto the bored piles;

[0064] The water storage tank 6 is arranged on the inner surface of the rotating steel wall 8 and is used to supply water to the spraying mechanism 5.

[0065] In this embodiment, it also includes:

[0066] A spiral discharge device 12 is rotatably mounted on the upper surface of the drill bit 14 and is connected to a rotating connecting column via a gear assembly 11. The gear assembly 11 utilizes a combination of gears of varying diameters, which in turn drive the spiral discharge device 12 via the rotating connecting column. The spiral discharge device 12 is used to rapidly discharge the crushed cast-in-place pile heads. In other embodiments, other discharge devices may be provided, or no discharge device may be provided.

[0067] The present invention also provides an automated construction method for efficiently breaking pile heads with low disturbance to steel bars, using an efficient pile head breaking device with low disturbance to steel bars, comprising the following steps:

[0068] S1: An airbag 1 is sheathed on the outer side of the steel bar, the airbag 1 is set close to the top of the steel bar, and a PVE tube 2 is sheathed on the outer surface of the airbag 1. The airbag 1 is inflated through the inflation and deflation holes until the airbag 1 expands and fills the inner cavity of the PVE tube 2; concrete is poured on the steel bar, and the PVE tube 2 can prevent the concrete from squeezing the airbag 1 during the pouring process. After pouring, a cast-in-place pile head is formed on the top of the steel bar. The inflation and deflation ports are a certain distance higher than the cast-in-place pile head. The airbag 1 is deflated through the inflation and deflation holes to form a gap between the steel bar and the PVE tube 2, thereby preventing the steel bar from being disturbed during the subsequent removal of the cast-in-place pile head;

[0069] S2: Connect the rotating telescopic structure 4 and the excavator, and use the excavator to move the high-efficiency pile head breaking device with low disturbance to the top of the cast-in-place pile head; move the high-efficiency pile head breaking device with low disturbance to the steel bars from top to bottom, so that the cast-in-place pile heads enter the inner sides of the multiple rotating steel walls 8, and the cast-in-place pile heads are arranged at intervals from the inner sides of the rotating steel walls 8. The cast-in-place pile heads are scanned by the steel bar scanner 17, and the scan data is uploaded to the remote control system 18;

[0070] S3: The plurality of rotating steel walls 8 are retracted inwardly by the hydraulic telescopic assembly 7 until the plurality of rotating steel walls 8 clamp the bored pile head. When clamping, each rotating steel wall 8 can be positioned by the lateral auxiliary positioning column 10. It should be noted that, for bored pile heads of different sizes, a small gap may appear when the plurality of rotating steel walls 8 are clamped. The size of each structure needs to be flexibly set according to the actual working conditions to facilitate the expansion of the scope of application. The drill bit 14 is driven downward by the telescopic connecting column until the contact sensor 16 at the bottom of the drill bit 14 is connected with the bored pile head and sends a signal to the remote control system 18. The drill bit 14 and the plurality of rotating steel walls 8 are driven to rotate by the rotating connecting column. The drill bit 14 crushes the central area of the bored pile head, and the rotating steel wall 8 crushes the outer area of the bored pile head through the lateral steel cone 9 and the ring-cutting drill bit 15. During the crushing process, water mist is sprayed on the bored pile head by the spray mechanism 5. The water mist can settle dust on the one hand and cool the equipment on the other hand.

[0071] S4: The drill bit 14 remains in a rotating state and is driven by the telescopic connecting column to continue moving downward until it reaches the preset position of the pile head. In the initial stage of breaking, the drill bit 14 can move to a position lower than the rotating steel wall 8. As the breaking process progresses, the rotating steel wall 8 can adjust its upper and lower positions and re-clamp the pile head. When the breaking is about to be completed, the drill bit 14 needs to be moved to a position flush with the lower edge of the rotating steel wall 8.

[0072] S5: The hydraulic telescopic assembly 7 is used to retract multiple rotating steel walls 8 inward to squeeze the broken cast-in-place pile head inward. On the inner side of the rotating steel wall 8, the contact area between the head of the steel cone and the pile body is small, so that when squeezing the concrete, local pressure concentration can be achieved, which significantly improves the squeezing effect on the concrete and breaks the cast-in-place pile head.

[0073] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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 on the present invention.

[0074] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. An efficient pile head breaking device with low disturbance to steel bars, characterized in that: include: The rotary telescopic structure (4) comprises a rotary connecting column and a telescopic connecting column inside the rotary connecting column, wherein a drill bit (14) is provided at the lower end of the telescopic connecting column, and the rotary telescopic structure (4) drives the drill bit (14) to rotate via the rotary connecting column and drives the drill bit (14) to move up and down via the telescopic connecting column; A plurality of rotating steel walls (8) are arranged circumferentially on the outer side of the rotating connection column and are radially telescopically arranged on the outer side surface of the rotating telescopic structure (4) through a hydraulic telescopic assembly (7). When the plurality of rotating steel walls (8) are contracted radially inward, they can clamp the cast-in-place pile head. The rotating telescopic structure (4) drives the plurality of rotating steel walls (8) to rotate through the rotating connection column. The inner surface of the rotating steel wall (8) is provided with a plurality of lateral steel cones (9); A connecting mechanism (3) is arranged on the top of the rotating and telescopic structure (4) and is used for connecting to an excavator.

2. The high-efficiency pile head breaking device with low disturbance to steel bars according to claim 1 is characterized in that: The inner surface of the rotating steel wall (8) is provided with a plurality of lateral auxiliary positioning columns (10) along the longitudinal direction, and the lateral steel cones (9) are located between adjacent lateral auxiliary positioning columns (10).

3. The high-efficiency pile head breaking device with low disturbance to steel bars according to claim 2 is characterized in that: The lower edge of the rotating steel wall (8) is provided with a circular cutting telescopic drill bit (14), and a plurality of circular cutting drill bits (15) form a cutting ring. The drill bit (14) can extend downward from the middle of the cutting ring.

4. The high-efficiency pile head breaking device with low disturbance to steel bars according to claim 3 is characterized in that: A contact sensor (16) is provided at the bottom of the drill bit (14), and a steel bar scanner (17) is provided on the inner surface of the rotating steel wall (8). Both the contact sensor (16) and the steel bar scanner (17) are communicatively connected to a remote control system (18).

5. The high-efficiency pile head breaking device with low disturbance to steel bars according to claim 4 is characterized in that: Also includes: The air bag (1) is sleeved on the outer side of the steel bar and arranged near the top of the steel bar; The PVE tube (2) is sleeved on the outer surface of the airbag (1); the top of the airbag (1) is provided with an inflation and deflation hole; and the top of the PVE tube (2) is provided with an operation hole corresponding to the inflation and deflation hole.

6. The high-efficiency pile head breaking device with low disturbance to steel bars according to claim 5 is characterized in that: The hydraulic telescopic assembly (7) comprises: A mounting ring, sleeved on the outer side of the rotating connecting column; A plurality of hydraulic cylinders are circumferentially arranged on the mounting ring and correspond one to one with a plurality of rotating steel walls (8); hydraulic rods of the hydraulic cylinders are connected to the rotating steel walls (8); and the rotating steel walls (8) are fan-shaped.

7. The high-efficiency pile head breaking device with low disturbance to steel bars according to claim 5, characterized in that: The connecting mechanism (3) comprises: A connecting plate, the bottom of which is connected to the top of the rotating telescopic structure (4) via a connecting piece, and a connecting hole for connecting to an excavator is provided on the connecting plate.

8. The high-efficiency pile head breaking device with low disturbance to steel bars according to claim 5, characterized in that: Also includes: A spray mechanism (5) is provided on the inner surface of the rotating steel wall (8) and is used for spraying water onto the bored piles; A water storage tank (6) is arranged on the inner surface of the rotating steel wall (8) and is used to supply water to the spraying mechanism (5).

9. The high-efficiency pile head breaking device with low disturbance to steel bars according to claim 5, characterized in that: Also includes: A spiral discharge device (12) is rotatably arranged on the upper surface of the drill bit (14), and the spiral discharge device (12) is transmission-connected to the rotary connection column via a gear assembly (11).

10. An efficient automated construction method for breaking pile heads with low disturbance to steel bars, characterized in that: The application of the high-efficiency pile head breaking device with low disturbance to steel bars according to any one of claims 5 to 9 comprises the following steps: S1: An airbag (1) is sheathed on the outer side of the steel bar, the airbag (1) is arranged close to the top of the steel bar, a PVE tube (2) is sheathed on the outer surface of the airbag (1), the airbag (1) is inflated through the inflation and deflation holes until the airbag (1) expands and fills the inner cavity of the PVE tube (2), concrete is poured on the steel bar, and after pouring, a cast-in-place pile head is formed on the top of the steel bar, and the airbag (1) is deflated through the inflation and deflation holes; S2: connecting the rotating telescopic structure (4) and the excavator, and moving the high-efficiency pile head breaking device with low disturbance to the steel bar to the top of the cast-in-place pile head by the excavator; moving the high-efficiency pile head breaking device with low disturbance to the steel bar from top to bottom, so that the cast-in-place pile head enters the inner side of the plurality of rotating steel walls (8), the cast-in-place pile head and the inner side of the rotating steel wall (8) are spaced apart, and the cast-in-place pile head is scanned by a steel bar scanner (17), and the scanned data is uploaded to the remote control system (18); S3: The plurality of rotating steel walls (8) are retracted inwardly by means of a hydraulic telescopic assembly (7) until the plurality of rotating steel walls (8) clamp the cast-in-place pile head; the drill bit (14) is driven downward by means of a telescopic connecting column until the contact sensor (16) at the bottom of the drill bit (14) contacts the cast-in-place pile head and sends a signal to a remote control system (18); the drill bit (14) and the plurality of rotating steel walls (8) are driven to rotate by means of a rotating connecting column, the drill bit (14) crushes the central area of the cast-in-place pile head, and the rotating steel walls (8) crush the outer area of the cast-in-place pile head through the lateral steel cone (9) and the ring-cutting drill bit (15); S4: the drill bit (14) remains in a rotating state and is driven by the telescopic connecting column to continue moving downward until it reaches a preset position of the cast-in-place pile head; S5: The plurality of rotating steel walls (8) are retracted inwardly by the hydraulic expansion and contraction assembly (7), thereby squeezing the broken cast-in-place pile heads inwards and breaking the cast-in-place pile heads.

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