Full-automatic pile head girdling tool for preventing mistaken cutting of reinforcing steel bars of cast-in-place pile and using method

Abstract

The invention discloses a cast-in-place pile full-automatic pile head girdling tool capable of preventing a reinforcing steel bar from being cut by mistake, which comprises a surrounding track, a driving walking assembly and a cutting assembly, and is characterized in that the surrounding track is of an I-shaped annular track structure and is fixed on the outer side of a cast-in-place pile; the driving walking assembly comprises a traveling wheel, a first fixed wheel, a second fixed wheel, a first fixed frame, a second fixed frame, a first customized rod, a second customized rod, a driving motor and a stable wheel set, an output shaft of the driving motor is connected with the traveling wheel, and after the driving assembly is fixed to the surrounding track, the driving motor drives the traveling wheel to roll along the surrounding track; the cutting assembly comprises a cutting driving motor, a cutting blade, a path guide connecting rod, a path guide sliding wheel, a fixed connecting rod and a spring, after the cutting assembly is fixed to the first fixing frame and the second fixing frame, the cutting blade and the cast-in-place pile are pressed by the cutting assembly under the action of the spring, and therefore cutting of the cast-in-place pile is achieved; in the practical process, operation should be carried out strictly according to operation steps.

Description

Technical Field

[0001] The invention relates to the technical field of pile head excision of cast-in-place piles in construction engineering, and in particular to a pile head circumcision technology of a bored cast-in-place pile before breaking the pile and an operation method thereof. Background Art

[0002] Bored piles are widely used in engineering construction because of their reliable quality and strong adaptability to the bottom layer. However, due to the specificity of drilling, cage placement and pouring on site, the protective layer of the steel cage cannot be standardized like precast piles, resulting in the use of pneumatic picks to directly break the pile head in subsequent engineering construction. During the breaking process, the concrete of the pile head will be damaged and split to varying degrees, resulting in the pile head anchoring length often failing to meet the design requirements. In addition, since the steel cage cannot be accurately positioned, the thickness of the steel bar protective layer is inconsistent. The conventional ring cutting tool is only suitable for precast piles with standard protective layers because it cannot detect the position of the steel bar, but not for bored piles. Currently, the cutting depth can only be controlled manually, which requires a high level of mental and physical strength from the operator. Therefore, there is an urgent need for a fully automatic pile head cutting tool and a practical operation method that can prevent the accidental cutting of steel bars. After the ring cutting tool is installed, the bored pile can be automatically cut before the pile head is broken. No human operation is required during the entire cutting process, and the steel bar can be effectively prevented from being damaged during the cutting process, providing a strong guarantee for the subsequent pile head forming quality. Summary of the invention

[0003] In view of the problems and shortcomings of the prior art, the present invention provides a fully automatic pile head ring cutting tool for preventing miscutting of steel bars in a cast-in-place pile and a use method thereof.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The invention provides a fully automatic pile head ring cutting tool for preventing miscutting of steel bars of a cast-in-place pile, which is characterized in that it comprises a ring track, a driving travel assembly and a cutting assembly.

[0006] The embracing track is an I-shaped annular track structure, and the lower flange of the I-shaped annular track is fixed to the outer side of the cast-in-place pile.

[0007] The driving travel assembly includes a traveling wheel, a first fixed wheel, a second fixed wheel, a first fixed frame and a second fixed frame of the same shape, a first customized rod and a second customized rod of the same shape, a driving motor and a stabilizing wheel set.

[0008] The rotating shaft at the upper end of the traveling wheel sequentially passes through the inner hole of the bearing fixed at the middle part of the first fixed frame and the inner hole of the bearing fixed at the inner end of the first custom rod, the rotating shaft at the lower end of the traveling wheel sequentially passes through the inner hole of the bearing fixed at the middle part of the second fixed frame and the inner hole of the bearing fixed at the inner end of the second custom rod, and is fixed to the inner ring of the bearing fixed at the inner end of the second custom rod, the outer surface of the traveling wheel contacts the outer surface of the upper flange of the I-shaped annular track, the inner side of the lower part of the first fixed frame is fixed to the first fixed wheel, the first fixed wheel is fixed to the upper side of the web of the I-shaped annular track, the inner side of the lower part of the second fixed frame is fixed to the second fixed wheel, the second fixed wheel is fixed to the lower side of the web of the I-shaped annular track, the outer surfaces of the first fixed wheel and the second fixed wheel contact the inner surface of the upper flange of the I-shaped annular track, the driving motor is fixed to the outer surface of the inner end of the first custom rod, the output shaft of the driving motor is connected to the rotating shaft at the upper end of the traveling wheel, and the driving motor drives the traveling wheel to roll along the I-shaped annular track.

[0009] The stabilizing wheel set includes a first stabilizing wheel set and a second stabilizing wheel set.

[0010] The first stabilizing wheel group includes a first upper rotating wheel group, a first lower rotating wheel group and a first rotating bracket, the first rotating bracket is fixed to the upper part of the first fixed bracket, the first upper rotating wheel group and the first lower rotating wheel group are fixed to the first rotating bracket, the first upper rotating wheel group is fixed to the outer side of the upper flange of the I-shaped circular track, and the first lower rotating wheel group is fixed to the inner side of the upper flange of the I-shaped circular track.

[0011] The second stabilizing wheel group includes a second upper rotating wheel group, a second lower rotating wheel group and a second rotating bracket, the second rotating bracket is fixed to the upper part of the second fixed bracket, the second upper rotating wheel group and the second lower rotating wheel group are fixed to the second rotating bracket, the second upper rotating wheel group is fixed to the outer side of the upper flange of the I-shaped circular track, and the second lower rotating wheel group is fixed to the inner side of the upper flange of the I-shaped circular track.

[0012] The cutting assembly includes a cutting drive motor, a cutting blade, a path guide connecting rod, a path guide sliding wheel, a fixed connecting rod and a spring, wherein the fixed connecting rod is sequentially passed through the outer ends of the first custom rod and the second custom rod and is fixed to the first custom rod and the second custom rod, one end of the path guide connecting rod is fixed to the upper end of the fixed connecting rod, and the other end of the path guide connecting rod is fixed with a path guide sliding wheel, and the path guide sliding wheel rolls in a guide wheel travel channel opened on the outer surface of the cast-in-place pile and plays a role in guiding and preventing the steel bars from being cut, the cutting drive motor is fixed to the lower end of the fixed connecting rod, and the cutting blade is fixed to the output shaft of the cutting drive motor, and the spring includes a first spring and a second spring, one end of the first spring is fixed to the outer end of the first custom rod, and the other end of the first spring is fixed to the middle and upper part of the first fixed frame, one end of the second spring is fixed to the outer end of the second custom rod, and the other end of the second spring is fixed to the middle and upper part of the second fixed frame, and the cutting assembly presses the cutting blade and the cast-in-place pile under the tension of the spring, and the cutting blade cuts the cast-in-place pile under the drive of the cutting drive motor.

[0013] Optionally, the traveling wheel, the first fixed wheel, the second fixed wheel and the stabilizing wheel set are all rubber rolling wheels.

[0014] Optionally, the first fixed wheel, the second fixed wheel, the first upper rotating wheel group, the first lower rotating wheel group, the second upper rotating wheel group and the second lower rotating wheel group are all composed of two small rolling wheels to increase the strength of the structure in clamping the embracing track, thereby improving the installation strength of the fully automatic pile head ring cutting tool.

[0015] Optionally, the I-shaped annular track is a multi-section structure, the webs of two adjacent sections are fixedly connected by a track segment connecting plate, and the lower flange of the I-shaped annular track is fixed to the outer surface of the cast-in-place pile by a plurality of bolts.

[0016] Optionally, the I-shaped annular track is fixed to the outer surface of the bored pile by a plurality of groups of high-strength bolts that are evenly distributed at equal intervals.

[0017] Optionally, the I-shaped annular track is an I-shaped structure that is narrow at the top and wide at the bottom.

[0018] Optionally, one end of the path guide connecting rod is fixed to the upper end of the fixed connecting rod by a butterfly nut, and the butterfly nut adjusts the angle between the path guide connecting rod and the surface of the cast-in-place pile to achieve the purpose of adjusting the distance between the cutting blade and the steel bars in the cast-in-place pile.

[0019] Optionally, the path guide connecting rod is a straight-line structure.

[0020] Optionally, the traveling wheel, the first fixed wheel, the first fixed frame and the first stabilizing wheel group form a triangular stable structure, and the traveling wheel, the second fixed wheel, the second fixed frame and the second stabilizing wheel group form another triangular stable structure.

[0021] The present invention also provides a method for using a fully automatic pile head ring cutting tool for preventing miscutting of steel bars in a cast-in-place pile, comprising the following steps:

[0022] Step 1: Dig a guide groove above the cut surface of the cast-in-place pile for guiding the sliding of the path guide sliding wheel, and dig until the cast-in-place pile reinforcement is exposed.

[0023] Step 2: Install the fully automatic pile head ring cutting tool for preventing the cast-in-place pile from accidentally cutting the steel bars on the cast-in-place pile, and the path guide sliding wheel can be placed in the guide groove.

[0024] Step 3: Use the butterfly nut to adjust the radial height difference between the path guide sliding wheel and the cutting blade. Adjust the height so that when the path guide sliding wheel reaches the reinforcement of the pile body, the cutting blade just fails to cut the cast-in-place pile.

[0025] Step 14: Adjust the installation length of the spring to adjust the pressure applied by the cutting blade to the surface of the cast-in-place pile so that the cutting blade can continue to cut downwards.

[0026] Step 5. After completing step 1 to step 4, the cutting drive motor is operated. At this time, the cutting blade rotates at a high speed, so that the cutting blade continuously cuts the cast-in-place pile downwards. At the same time, the drive motor is operated, and the traveling wheel slowly rolls along the I-shaped circular track driven by the drive motor.

[0027] Step six, control the running speed of the cutting drive motor and the driving motor, so that the traveling wheel slowly rolls along the I-shaped circular track for several circles under the drive of the driving motor, and the cutting blade completes the cutting at the target position of the cast-in-place pile body. Due to the height difference set between the path guide sliding wheel and the cutting blade, the annular section always maintains a certain safety distance from the main reinforcement, and finally forms the annular cutting of the cast-in-place pile head.

[0028] The positive and progressive effects of the present invention are:

[0029] The present invention can realize fully automatic circumferential cutting of the bored pile head. No human operation is required during the entire cutting process, which reduces the safety risks caused by human factors such as mental and physical exhaustion of operators, and can effectively prevent damage to steel bars during the cutting process, thus providing a strong guarantee for the subsequent pile head forming quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The figure is a top view of a fully automatic pile head ring cutting tool for preventing miscutting of steel bars in a cast-in-place pile according to a preferred embodiment of the present invention.

[0031] Figure 2 This is an AA cutaway view of a fully automatic pile head ring cutting tool for preventing miscutting of steel bars in a cast-in-place pile according to a preferred embodiment of the present invention.

[0032] Figure 3 The BB section view of the fully automatic pile head ring cutting tool for preventing miscutting of steel bars in a cast-in-place pile according to a preferred embodiment of the present invention.

[0033] Figure 4 This is a CC cutaway view of a fully automatic pile head ring cutting tool for preventing miscutting of steel bars in a cast-in-place pile according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 work are within the scope of protection of the present invention.

[0035] like Figure 1-Figure 4 As shown, this embodiment provides a fully automatic pile head ring cutting tool for preventing accidental cutting of steel bars of a cast-in-place pile, which includes a ring track 1, a driving travel assembly 2 and a cutting assembly 3.

[0036] The embracing track is an I-shaped circular track structure, and the lower flange 13 of the I-shaped circular track is fixed to the outer side of the cast-in-place pile 4.

[0037] The driving travel assembly 2 includes a traveling wheel 21 , a first fixed wheel 22 , a second fixed wheel 23 , a first fixed frame 24 and a second fixed frame 25 of the same shape, a first custom rod 26 and a second custom rod 27 of the same shape, a driving motor 28 and a stabilizing wheel set 29 .

[0038] The rotating shaft at the upper end of the traveling wheel 21 passes through the inner hole of the bearing fixed in the middle of the first fixed frame 24 and the inner hole of the bearing fixed at the inner end of the first custom rod 26 in sequence. The rotating shaft at the lower end of the traveling wheel 21 passes through the inner hole of the bearing fixed in the middle of the second fixed frame 25 and the inner hole of the bearing fixed at the inner end of the second custom rod 27 in sequence, and is fixed to the inner ring of the bearing fixed at the inner end of the second custom rod 27. The outer surface of the traveling wheel 21 contacts the outer surface of the upper flange 11 of the I-shaped annular track. The inner side of the lower part of the first fixed frame 24 is fixed to the first fixed wheel 22. The wheel 22 is fixed to the upper side of the web 12 of the I-shaped circular track, the inner side of the lower part of the second fixed frame 25 is fixed to the second fixed wheel 23, the second fixed wheel 23 is fixed to the lower side of the web 12 of the I-shaped circular track, the outer surfaces of the first fixed wheel 22 and the second fixed wheel 22 are in contact with the inner surface of the upper flange 11 of the I-shaped circular track, the drive motor 28 is fixed to the outer surface of the inner end of the first custom rod 26, the output shaft of the drive motor 28 is connected to the rotating shaft at the upper end of the traveling wheel 21, and the drive motor 28 drives the traveling wheel 21 to roll along the I-shaped circular track.

[0039] The stabilizing wheel group 29 includes a first stabilizing wheel group 291 and a second stabilizing wheel group. The first stabilizing wheel group 291 includes a first upper rotating wheel group 2911, a first lower rotating wheel group 2912 and a first rotating bracket 2913. The first rotating bracket 2913 is fixed to the upper part of the first fixed bracket 24. The first upper rotating wheel group 2911 and the first lower rotating wheel group 2912 are fixed to the first rotating bracket 2913. The first upper rotating wheel group 2911 is fixed to the outer side of the upper flange 11 of the I-shaped circular track, and the first lower rotating wheel group 2912 is fixed to the inner side of the upper flange 11 of the I-shaped circular track.

[0040] The second stabilizing wheel group includes a second upper rotating wheel group, a second lower rotating wheel group and a second rotating bracket. The second rotating bracket is fixed to the upper part of the second fixed bracket 25. The second upper rotating wheel group and the second lower rotating wheel group are fixed to the second rotating bracket. The second upper rotating wheel group is fixed to the outer side of the upper flange 11 of the I-shaped circular track, and the second lower rotating wheel group is fixed to the inner side of the upper flange 11 of the I-shaped circular track.

[0041] The cutting assembly 3 includes a cutting drive motor 31, a cutting blade 32, a path guide connecting rod 33, a path guide sliding wheel 34, a fixed connecting rod 35 and a spring 36. The fixed connecting rod 35 passes through the outer ends of the first custom rod 26 and the second custom rod 27 in sequence and is fixed to the first custom rod 26 and the second custom rod 27. One end of the path guide connecting rod 33 is fixed to the upper end of the fixed connecting rod 35, and the other end of the path guide connecting rod 33 is fixed with a path guide sliding wheel 34. The path guide sliding wheel 34 rolls in the guide wheel travel channel opened on the outer surface of the cast-in-place pile 4 and plays a role in guiding and preventing the steel bar 5 from being cut. The cutting drive motor 31 is fixed to the fixed At the lower end of the connecting rod 35, the cutting blade 32 is fixed on the output shaft of the cutting drive motor 31, and the spring 36 includes a first spring 361 and a second spring 362. One end of the first spring 361 is fixed to the outer end of the first custom rod 26, and the other end of the first spring 361 is fixed to the middle and upper part of the first fixed frame 24. One end of the second spring 362 is fixed to the outer end of the second custom rod 27, and the other end of the second spring 362 is fixed to the middle and upper part of the second fixed frame 25. The cutting assembly 3 presses the cutting blade 32 and the cast-in-place pile 4 under the tension of the spring 36, and the cutting blade 32 cuts the cast-in-place pile 4 under the drive of the cutting drive motor 31.

[0042] The traveling wheel 21 , the first fixed wheel 22 , the second fixed wheel 23 and the stabilizing wheel set 29 are all rubber rolling wheels.

[0043] The first fixed wheel 22, the second fixed wheel 23, the first upper rotating wheel group 2911, the first lower rotating wheel group 2912, the second upper rotating wheel group and the second lower rotating wheel group are all composed of two small rolling wheels to increase the strength of the structure to clamp the track 1, thereby improving the installation strength of the full-automatic pile head cutting tool.

[0044] The I-shaped circular track is a multi-section structure, the webs 12 of two adjacent sections are fixedly connected by a track segment connecting plate 15 , and the lower flange 13 of the I-shaped circular track is fixed to the outer surface of the cast-in-place pile 4 by a plurality of bolts 14 .

[0045] The I-shaped annular track is fixed to the outer surface of the cast-in-place pile 4 by a plurality of groups of high-strength bolts 14 that are evenly distributed at equal intervals.

[0046] The I-shaped circular track is an I-shaped structure that is narrow at the top and wide at the bottom.

[0047] One end of the path guide link 33 is fixed to the upper end of the fixed connecting rod 35 by a butterfly nut 37. The butterfly nut 37 adjusts the angle between the path guide link 33 and the surface of the cast-in-place pile 4 to achieve the purpose of adjusting the distance between the cutting blade 32 and the steel bars 5 in the cast-in-place pile 4. The path guide link 33 is a straight-line structure.

[0048] The traveling wheel 21, the first fixed wheel 22, the first fixed frame 24 and the first stabilizing wheel set 291 form a triangular stable structure, and the traveling wheel 21, the second fixed wheel 23, the second fixed frame 25 and the second stabilizing wheel set form another triangular stable structure.

[0049] The present invention also provides a method for using a fully automatic pile head ring cutting tool for preventing miscutting of steel bars in a cast-in-place pile, comprising the following steps:

[0050] Step 1: A guide groove 6 for guiding the sliding of the path guide sliding wheel 34 is excavated above the cut surface of the cast-in-place pile 4, and the groove is excavated until the steel bars 5 of the cast-in-place pile 4 are exposed.

[0051] This step is to chisel the protective layer of the steel bars 5 on the cutting surface of the cast-in-place pile 4 at the guide path where the path guide sliding wheel 34 is located, so that the steel bars 5 are exposed.

[0052] Step 2: Install the fully automatic pile head ring cutting tool for preventing accidental cutting of steel bars on the bored pile 4 , and the path guide sliding wheel 34 can be placed in the guide groove 6 .

[0053] Step 3: Adjust the radial height difference between the path guide sliding wheel 34 and the cutting blade 32 through the butterfly nut 37 , and adjust the height so that when the path guide sliding wheel 34 reaches the pile body steel bar 5 , the cutting blade 32 just fails to cut the cast-in-place pile 4 .

[0054] This step is to preset the height difference between the path guide sliding wheel 34 and the cutting blade 32, that is, the depth of the cutting blade 32 cutting the cast-in-place pile 4, to prevent the cutting blade 32 from cutting the steel bars 5 of the cast-in-place pile 4. Step 14, adjust the installation length of the spring 36, thereby adjusting the pressure applied by the cutting blade 32 to the surface of the cast-in-place pile 4, so that the cutting blade 32 can continuously cut downwards.

[0055] Step 5. After steps 1 to 4 are completed, the cutting drive motor 31 is operated. At this time, the cutting blade 32 rotates at a high speed, so that the cutting blade 32 continuously cuts the cast-in-place pile 4 downwards. At the same time, the drive motor 28 is operated, and the traveling wheel 21 rolls slowly along the I-shaped circular track under the drive of the drive motor 28.

[0056] Step 6: Control the running speed of the cutting drive motor 31 and the drive motor 28 so that the traveling wheel 21 slowly rolls along the I-shaped circular track for multiple circles under the drive of the drive motor 28, and the cutting blade 32 completes the cutting of the target part of the pile body of the bored pile 4. Due to the height difference set between the path guide sliding wheel 34 and the cutting blade 32, the annular section always maintains a certain safety distance from the steel bar 5, and finally forms the annular cutting of the pile head of the bored pile 4.

[0057] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A fully automatic pile head ring cutting tool for preventing miscutting of steel bars in cast-in-place piles, characterized in that: It includes a surrounding track, a driving travel assembly and a cutting assembly; The embracing track is an I-shaped circular track structure, and the lower flange of the I-shaped circular track is fixed to the outside of the cast-in-place pile; The driving travel assembly includes a traveling wheel, a first fixed wheel, a second fixed wheel, a first fixed frame and a second fixed frame of the same shape, a first customized rod and a second customized rod of the same shape, a driving motor and a stabilizing wheel set; The rotating shaft at the upper end of the traveling wheel is sequentially penetrated by the inner hole of the bearing fixed by the middle part of the first fixed frame and the inner hole of the bearing fixed by the inner end of the first customized rod, the rotating shaft at the lower end of the traveling wheel is sequentially penetrated by the inner hole of the bearing fixed by the middle part of the second fixed frame and the inner hole of the bearing fixed by the inner end of the second customized rod, and is fixed to the inner ring of the bearing fixed by the inner end of the second customized rod, the outer surface of the traveling wheel contacts the outer surface of the upper flange of the I-shaped annular track, the inner side of the lower part of the first fixed frame is fixed to the first fixed wheel, the first fixed wheel is fixed to the upper side of the web of the I-shaped annular track, the inner side of the lower part of the second fixed frame is fixed to the second fixed wheel, the second fixed wheel is fixed to the lower side of the web of the I-shaped annular track, the outer surfaces of the first fixed wheel and the second fixed wheel contact the inner surface of the upper flange of the I-shaped annular track, the driving motor is fixed to the outer surface of the inner end of the first customized rod, the output shaft of the driving motor is connected to the rotating shaft at the upper end of the traveling wheel, and the driving motor drives the traveling wheel to roll along the I-shaped annular track; The stabilizing wheel set comprises a first stabilizing wheel set and a second stabilizing wheel set; The first stabilizing wheel group includes a first upper rotating wheel group, a first lower rotating wheel group and a first rotating bracket, the first rotating bracket is fixed to the upper part of the first fixing bracket, the first upper rotating wheel group and the first lower rotating wheel group are fixed to the first rotating bracket, the first upper rotating wheel group is fixed to the outer side of the upper flange of the I-shaped annular track, and the first lower rotating wheel group is fixed to the inner side of the upper flange of the I-shaped annular track; The second stabilizing wheel group includes a second upper rotating wheel group, a second lower rotating wheel group and a second rotating bracket, the second rotating bracket is fixed to the upper part of the second fixed bracket, the second upper rotating wheel group and the second lower rotating wheel group are fixed to the second rotating bracket, the second upper rotating wheel group is fixed to the outer side of the upper flange of the I-shaped annular track, and the second lower rotating wheel group is fixed to the inner side of the upper flange of the I-shaped annular track; The cutting assembly includes a cutting drive motor, a cutting blade, a path guide connecting rod, a path guide sliding wheel, a fixed connecting rod and a spring, wherein the fixed connecting rod is sequentially passed through the outer ends of the first custom rod and the second custom rod and is fixed to the first custom rod and the second custom rod, one end of the path guide connecting rod is fixed to the upper end of the fixed connecting rod, and the other end of the path guide connecting rod is fixed with a path guide sliding wheel, and the path guide sliding wheel rolls in a guide wheel travel channel opened on the outer surface of the cast-in-place pile and plays a role in guiding and preventing the steel bars from being cut, the cutting drive motor is fixed to the lower end of the fixed connecting rod, and the cutting blade is fixed to the output shaft of the cutting drive motor, and the spring includes a first spring and a second spring, one end of the first spring is fixed to the outer end of the first custom rod, and the other end of the first spring is fixed to the middle and upper part of the first fixed frame, one end of the second spring is fixed to the outer end of the second custom rod, and the other end of the second spring is fixed to the middle and upper part of the second fixed frame, and the cutting assembly presses the cutting blade and the cast-in-place pile under the tension of the spring, and the cutting blade cuts the cast-in-place pile under the drive of the cutting drive motor.

2. The fully automatic pile head ring cutting tool for preventing miscutting of steel bars in a cast-in-place pile according to claim 1, characterized in that: The traveling wheel, the first fixed wheel, the second fixed wheel and the stabilizing wheel set are all rubber rolling wheels.

3. The fully automatic pile head ring cutting tool for preventing miscutting of steel bars of a cast-in-place pile as claimed in claim 1, characterized in that: The first fixed wheel, the second fixed wheel, the first upper rotating wheel group, the first lower rotating wheel group, the second upper rotating wheel group and the second lower rotating wheel group are all composed of two small rolling wheels to increase the strength of the structure in clamping the embracing track, thereby improving the installation strength of the fully automatic pile head ring cutting tool.

4. The fully automatic pile head ring cutting tool for preventing miscutting of steel bars of a cast-in-place pile as claimed in claim 1, characterized in that: The I-shaped annular track is a multi-section structure, the webs of two adjacent sections are fixedly connected by a track segment connecting plate, and the lower flange of the I-shaped annular track is fixed to the outer surface of the cast-in-place pile by a plurality of bolts.

5. The fully automatic pile head ring cutting tool for preventing miscutting of steel bars of a cast-in-place pile as claimed in claim 4 is characterized in that: The I-shaped annular track is fixed to the outer surface of the cast-in-place pile by a plurality of groups of high-strength bolts evenly distributed at equal intervals.

6. The fully automatic pile head ring cutting tool for preventing miscutting of steel bars in a cast-in-place pile according to claim 1, characterized in that: The I-shaped annular track is an I-shaped structure that is narrow at the top and wide at the bottom.

7. The fully automatic pile head ring cutting tool for preventing miscutting of steel bars of a cast-in-place pile as claimed in claim 1, characterized in that: One end of the path guide connecting rod is fixed to the upper end of the fixed connecting rod by a butterfly nut, and the butterfly nut adjusts the angle between the path guide connecting rod and the surface of the cast-in-place pile to achieve the purpose of adjusting the distance between the cutting blade and the steel bars in the cast-in-place pile.

8. The fully automatic pile head ring cutting tool for preventing miscutting of steel bars of a cast-in-place pile as claimed in claim 1, characterized in that: The path guide connecting rod is a straight-line structure.

9. The fully automatic pile head ring cutting tool for preventing miscutting of steel bars of a cast-in-place pile as claimed in claim 1, characterized in that: The traveling wheel, the first fixed wheel, the first fixed frame and the first stabilizing wheel group form a triangular stable structure, and the traveling wheel, the second fixed wheel, the second fixed frame and the second stabilizing wheel group form another triangular stable structure.

10. A method for using a fully automatic pile head ring cutting tool to prevent miscutting of steel bars in a cast-in-place pile, the steps are as follows: Step 1: Dig a guide groove for guiding the sliding of the path guide sliding wheel above the cut surface of the cast-in-place pile, and dig until the steel bars of the cast-in-place pile are exposed; Step 2: Install the fully automatic pile head ring cutting tool for preventing miscutting of steel bars on the cast-in-place pile, and place the path guide sliding wheel in the guide groove; Step 3: Adjust the radial height difference between the path guide sliding wheel and the cutting blade by using the butterfly nut, and adjust the height so that when the path guide sliding wheel reaches the reinforcement of the pile body, the cutting blade just cannot cut the cast-in-place pile; Step 14: Adjust the spring installation length to adjust the pressure applied by the cutting blade to the surface of the cast-in-place pile, so that the cutting blade can continuously cut downwards; Step 5: After step 1 to step 4 are completed, the cutting drive motor is operated, and the cutting blade rotates at a high speed, so that the cutting blade continuously cuts the cast-in-place pile downwards, and the drive motor is operated at the same time, and the traveling wheel is driven by the drive motor to slowly roll along the I-shaped circular track; Step six, control the running speed of the cutting drive motor and the driving motor, so that the traveling wheel slowly rolls along the I-shaped circular track for several circles under the drive of the driving motor, and the cutting blade completes the cutting at the target position of the cast-in-place pile body. Due to the height difference set between the path guide sliding wheel and the cutting blade, the annular section always maintains a certain safety distance from the main reinforcement, and finally forms the annular cutting of the cast-in-place pile head.

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