Cast-in-situ bored pile desilting device and desilting method

Abstract

The invention relates to the technical field of desilting equipment, and particularly discloses a cast-in-situ bored pile desilting device and method. Comprising a main body, the top of the main body is fixedly connected with an extraction part, the inner side of the main body is fixedly connected with a top plate, the top of the top plate is symmetrically provided with discharging grooves, the middle of the top of the top plate is fixedly connected with a driving part, the bottom of the top plate is rotatably connected with a spiral blade, and the top of the spiral blade is fixedly connected with the output end of the driving part; the bottom of the spiral blade is fixedly connected with a rotating part; and the contact part is used for cleaning the inner wall of the cast-in-situ bored pile, and the inner side of the contact part is rotationally connected with the outer side face of the main body. The contact component is arranged to clean the inner wall of the cast-in-situ bored pile, sludge attached to the inner wall of a pile hole can be comprehensively and carefully scraped away, sludge residues can be effectively reduced, and the dredging effect and quality are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of dredging equipment, and particularly to a dredging device and method for bored cast-in-place piles. Background Technique

[0002] The bored cast-in-place pile is a common form of pile foundation and is widely used in various construction projects. A bored cast-in-place pile refers to a pile formed by using a drilling machine to drill a pile hole and placing a steel reinforcement cage and pouring concrete in the hole. It can transfer the load of the superstructure to deeper foundation soil layers through the pile body to meet the requirements of the building for the bearing capacity and stability of the foundation.

[0003] Before pouring concrete into the pile hole, it is necessary to dredge the inside of the pile hole. After the pile hole is drilled, a large amount of crushed stones may be contained inside, and there are problems that the inner wall and bottom of the pile hole are not smooth. Currently, relying only on high-pressure water flushing, it is very difficult to clean the inside of the pile hole thoroughly, resulting in incomplete dredging and affecting the dredging effect. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a dredging device and method for bored cast-in-place piles, which are realized through the following technical solutions: The present invention provides a dredging device for bored cast-in-place piles, which includes a main body. A pumping component is fixedly connected to the top of the main body. A top plate is fixedly connected to the inside of the main body. Discharge grooves are symmetrically opened at the top of the top plate. A driving member is fixedly connected to the middle of the top of the top plate. A spiral blade is rotatably connected to the bottom of the top plate. The top of the spiral blade is fixedly connected to the output end of the driving member. A rotating component is fixedly connected to the bottom of the spiral blade; A contact component, which is used for cleaning the inner wall of the bored cast-in-place pile, and the inner side of the contact component is rotatably connected to the outer side of the main body; The contact component includes a plurality of contact frames and a plurality of fixed shafts. The plurality of fixed shafts connect the plurality of contact frames from top to bottom. A plurality of evenly distributed hydraulic cylinders are fixedly connected to the inside of the contact frame. The output end of the hydraulic cylinder is fixedly connected to a positioning frame. A pair of positioning shafts are symmetrically arranged on the side of the positioning frame away from the hydraulic cylinder. The positioning plate is fixedly connected to the end of the positioning shaft away from the positioning frame. A relief groove is opened in the middle of the positioning plate. A first scraping plate is fixedly connected to one end of the positioning plate. A second scraping plate is fixedly connected to the end of the positioning plate away from the first scraping plate.

[0005] Preferably, the number of the contact frames is four, and the four contact frames are evenly distributed on the outer side of the main body from top to bottom. The number of the fixed shafts is three, and the three fixed shafts are evenly distributed on the contact frames. The upper and lower ends of the fixed shafts are respectively fixedly connected to the bottom surface of the uppermost contact frame and the top surface of the lowermost contact frame.

[0006] Preferably, the rotating member includes a rotating frame, and a plurality of uniformly distributed crushing pieces are fixedly connected to the side surface of the rotating frame. A connecting block is fixedly connected to the bottom of the rotating frame, and a plurality of uniformly distributed connecting rods are fixed to the side surface of the connecting block. A connecting shaft is fixedly connected to the bottom of the connecting block, and the bottom of the connecting shaft is rotatably connected to a bottom plate. A plurality of pairs of connecting frames are uniformly fixedly connected to the side surface of the connecting shaft, and each pair of connecting frames is arranged symmetrically up and down. The ends of the same pair of connecting frames away from the connecting shaft are fixedly connected to the same arc-shaped frame.

[0007] Preferably, the top of the rotating frame is fixedly connected to the bottom of the spiral blade, the top of the connecting rod is fixedly connected to the bottom surface of the lowermost contact frame, and the number of the connecting frames is three pairs, and the three pairs of connecting frames are uniformly arranged on the side surface of the connecting shaft.

[0008] Preferably, the extraction member includes an extraction housing, and an extraction pipe is fixedly connected to the middle part inside the extraction housing. A fixing plate is fixedly connected to the bottom of the extraction pipe, and the extraction pipe penetrates through the inside of the fixing plate. A pump body mechanism is fixedly connected to the outer side surface of the extraction pipe. A feeding housing is fixedly connected to the bottom of the fixing plate, a circular plate is fixedly connected to the bottom of the feeding housing, arc-shaped grooves are formed on both sides of the circular plate, a feeding sleeve is fixedly connected to the bottom of the circular plate, and a moving mechanism is connected to the top of the circular plate.

[0009] Preferably, the bottom of the extraction housing is fixedly connected to the top of the main body, the bottom of the feeding sleeve is fixedly connected to the top plate, and a pair of opening grooves are symmetrically formed on the side surface of the feeding housing.

[0010] Preferably, the moving mechanism includes a cross bar, and guide rods are fixedly connected to the left and right sides of the cross bar. A round rod is fixedly connected to the end of the guide rod away from the cross bar, and moving plates are fixedly connected to the upper and lower ends of the round rod. A moving frame is fixedly connected to the top of the cross bar, an arc-shaped plate is fixedly connected to the outside of the moving frame, the bottom of the cross bar is slidably connected to the middle part of the circular plate, and a connecting spring is sleeved on the bottom of the cross bar.

[0011] Preferably, the side surfaces of the two moving plates are respectively in contact with the side wall of the feeding sleeve and the side wall of the feeding housing, the outer side surface of the arc-shaped plate is in contact with the inner side of the extraction pipe, the top of the connecting spring is fixedly connected to the middle part of the side surface of the cross bar, and the bottom of the connecting spring is fixedly connected to the top of the circular plate.

[0012] The present invention also provides a dredging method for a bored cast-in-place pile dredging device, which is realized by the above-mentioned bored cast-in-place pile dredging device, and includes the following steps: S1: Lower the whole body into the pile hole, place the extraction component flush with the ground at the top of the pile hole, turn on the driving component, and drive the spiral blade to rotate inside the body through the output end of the driving component; S2: The spiral blade drives the rotating component to crush the sediment at the bottom of the pile hole, and at the same time drives the contact component to scrape the silt on the inner wall of the pile hole; S3: Inject an appropriate amount of water into the bored cast-in-place pile to evenly mix the sediment with the water, so that the spiral blade drives the silt and gravel accumulated at the bottom of the pile hole to move upward inside the body, and enter the extraction component through the discharge chute of the top plate; S4: Turn on the extraction component, and transport the silt and gravel inside the pile hole to the external storage box to realize the dredging operation.

[0013] A dredging device and method for bored cast-in-place piles provided by the present invention have the following beneficial effects: 1. This dredging device and method for bored cast-in-place piles can comprehensively and carefully scrape the silt attached to the inner wall of the pile hole by setting the contact component to clean the inner wall of the bored cast-in-place pile, effectively reducing silt residue and improving the dredging effect and quality.

[0014] 2. This dredging device and method for bored cast-in-place piles can reduce the impact force and vibration on the side wall and bottom of the pile hole during the process of crushing gravel by setting the rotating component, reduce the risk of damage to the hole wall, help maintain the integrity and stability of the pile hole, and provide good basic conditions for subsequent construction processes.

[0015] 3. This dredging device and method for bored cast-in-place piles can clean the side walls of the extraction pipe, the feeding sleeve and the feeding housing through the moving mechanism after the dredging work in the pile hole is completed, avoiding the phenomenon of dry solidification of silt and mud residues on the side walls of these components, preventing these substances from blocking the pipeline, ensuring that the extraction pipe always maintains good smoothness, enabling the extraction work to proceed smoothly, and ensuring the efficiency and continuity of the dredging work. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the dredging device for bored cast-in-place piles provided by the embodiment of the present invention; Figure 2 is a cross-sectional view of the dredging device for bored cast-in-place piles provided by the embodiment of the present invention; Figure 3 is a schematic connection diagram of the spiral blade and the surrounding components in the present invention; Figure 4 is a schematic structural diagram of the rotating component in the present invention; Figure 5Schematic diagram of the connection relationship between the fixed shaft and the peripheral components in the present invention; Figure 6 Schematic diagram of the structure of the contact component in the present invention; Figure 7 Schematic diagram of the structure of the extraction component in the present invention; Figure 8 Cross-sectional view of the extraction component in the present invention; Figure 9 Schematic diagram of the connection relationship between the feeding housing and the peripheral components in the present invention; Figure 10 Schematic diagram of the structure of the moving mechanism in the present invention.

[0017] In the figure: 1. Main body; 2. Extraction component; 21. Extraction housing; 22. Extraction pipe; 23. Pump body mechanism; 24. Fixed plate; 25. Moving mechanism; 251. Cross bar; 252. Guide rod; 253. Round rod; 254. Moving plate; 255. Moving frame; 256. Arc plate; 257. Connecting spring; 26. Feeding sleeve; 27. Feeding housing; 28. Round plate; 3. Contact component; 31. Contact frame; 32. Fixed shaft; 33. Hydraulic cylinder; 34. Positioning frame; 35. Positioning shaft; 36. Positioning plate; 37. Relief groove; 38. First scraper; 39. Second scraper; 4. Rotating component; 41. Rotating frame; 42. Crushing piece; 43. Connecting block; 44. Connecting shaft; 45. Bottom plate; 46. Connecting frame; 47. Arc-shaped frame; 48. Connecting rod; 5. Spiral blade; 6. Driving part; 7. Top plate. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1 - 4 , the embodiments of the present invention provide a dredging device for bored cast-in-place piles, including: A main body 1, the top of the main body 1 is fixedly connected with an extraction component 2, the inner side of the main body 1 is fixedly connected with a top plate 7, discharge grooves are symmetrically opened at the top of the top plate 7, a driving part 6 is fixedly connected to the middle of the top of the top plate 7, a spiral blade 5 is rotatably connected to the bottom of the top plate 7, the top of the spiral blade 5 is fixedly connected to the output end of the driving part 6, and the bottom of the spiral blade 5 is fixedly connected with a rotating component 4; A contact component 3, the contact component 3 is used for cleaning the inner wall of the bored cast-in-place pile, and the inner side of the contact component 3 is rotatably connected to the outer side of the main body 1; Please refer toFigure 4 The rotating member 4 includes a rotating frame 41. The top of the rotating frame 41 is fixedly connected to the bottom of the spiral blade 5. A number of uniformly distributed crushing pieces 42 are fixedly connected to the side of the rotating frame 41. A connecting block 43 is fixedly connected to the bottom of the rotating frame 41. A number of uniformly distributed connecting rods 48 are fixed to the side of the connecting block 43. A connecting shaft 44 is fixedly connected to the bottom of the connecting block 43. The bottom of the connecting shaft 44 is rotatably connected to a bottom plate 45. A number of pairs of connecting frames 46 are uniformly fixedly connected to the side of the connecting shaft 44. The number of pairs of connecting frames 46 is three pairs. The three pairs of connecting frames 46 are uniformly arranged on the side of the connecting shaft 44. Each pair of connecting frames 46 is symmetrically arranged up and down. The ends of the same pair of connecting frames 46 away from the connecting shaft 44 are fixedly connected to the same arc-shaped frame 47.

[0020] When the main body 1 is integrally sunk into the pile hole, the bottom of the bottom plate 45 is in contact with the bottom of the inner cavity of the pile hole. The output end of the driving member 6 drives the spiral blade 5 to rotate. The spiral blade 5 drives the rotating frame 41 to rotate in the pile hole. Thus, the rotating frame 41 drives the crushing pieces 42 to perform crushing work on the crushed stones and silt blocks gathered at the bottom of the pile hole. When the rotating frame 41 rotates, it drives the connecting block 43 to rotate. The connecting block 43 drives the connecting frames 46 to rotate inside the pile hole through the connecting shaft 44. The connecting frames 46 drive the arc-shaped frame 47 to rotate in contact with the bottom of the inner cavity of the pile hole. Since the arc-shaped frame 47 rotates with the bottom of the pile hole, during the process of crushing the crushed stones, it can reduce the impact force and vibration on the side wall and the bottom of the pile hole, reduce the risk of damage to the hole wall, contribute to maintaining the integrity and stability of the pile hole, prevent the hole wall from collapsing, provide good basic conditions for subsequent construction processes, ensure that the contact between the pile foundation and the foundation is closer and more uniform, improve the bearing capacity and stability of the pile foundation, thereby ensuring the pile quality, meeting the engineering design requirements, and improving the safety and reliability of the entire project.

[0021] Please refer to Figures 5 - 6, the contact member 3 includes a plurality of contact frames 31 and a plurality of fixed shafts 32. The plurality of fixed shafts 32 connect the plurality of contact frames 31 from top to bottom. The upper and lower ends of the fixed shaft 32 are respectively fixedly connected to the bottom surface of the uppermost contact frame 31 and the top surface of the lowermost contact frame 31. The top of the connecting rod 48 is fixedly connected to the bottom surface of the lowermost contact frame 31. A plurality of evenly distributed hydraulic cylinders 33 are fixedly connected to the inner side of the contact frame 31. The output end of the hydraulic cylinder 33 is fixedly connected to a positioning frame 34. A pair of positioning shafts 35 are symmetrically arranged on one side of the positioning frame 34 away from the hydraulic cylinder 33. One end of the positioning shaft 35 away from the positioning frame 34 is fixedly connected to a positioning plate 36. A relief groove 37 is formed in the middle of the positioning plate 36. A first scraping plate 38 is fixedly connected to one end of the positioning plate 36. A second scraping plate 39 is fixedly connected to one end of the positioning plate 36 away from the first scraping plate 38. Specifically, the number of the fixed shafts 32 is three, and the three fixed shafts 32 are evenly distributed on the contact frame 31. The number of the contact frames 31 is four, and the four contact frames 31 are evenly distributed on the outer side of the main body 1 from top to bottom.

[0022] When the main body 1 is integrally sunk into the pile hole, the hydraulic cylinder 33 is opened. The output end of the hydraulic cylinder 33 drives the positioning plate 36 to move towards the inner wall of the pile hole through the positioning frame 34 and the positioning shaft 35, so that the first scraping plate 38 and the second scraping plate 39 can abut against the inner wall of the pile hole. Thus, according to the size of different pile hole diameters, appropriate dredging adjustment work can be carried out on the inner wall of the pile hole, which is applicable to the conditions such as the change of the pore diameter size and the uneven inner wall, realizes the automatic adjustment of the fitting degree with the inner wall of the pile hole, can scrape the silt attached to the inner wall of the pile hole more comprehensively and carefully, can effectively reduce the silt residue, and improves the dredging efficiency and quality.

[0023] Optionally, the first scraping plate 38 is arranged in a C shape, the second scraping plate 39 is arranged in a semi-circular shape, and the bending angle of the first scraping plate 38 is smaller than the bending angle of the second scraping plate 39.

[0024] Specifically, after appropriately adjusting the positions of the first scraper 38 and the second scraper 39, when the spiral blade 5 drives the connecting block 43 to rotate through the rotating frame 41, the connecting block 43 drives the contact frame 31 to rotate in the pile hole through the connecting rod 48, so that the first scraper 38 and the second scraper 39 can clean the inner wall of the pile hole; by setting the bending angle of the first scraper 38 to be smaller than that of the second scraper 39, when cleaning the silt on the inner wall of the pile hole, because the bending angle of the first scraper 38 is small, it can first contact the silt at the shallower position and the surface of the inner wall of the pile hole, and perform preliminary large-area scraping to scrape off most of the accumulated silt. Because the bending angle of the second scraper 39 is large, the second scraper 39 can penetrate into the concave parts, gaps and other positions of the inner wall of the pile hole to perform secondary cleaning on the areas missed or difficult to reach by the first scraper 38, and remove the stubbornly attached silt. The two cooperate to achieve layered and comprehensive silt cleaning, reduce silt residue, and the scrapers with different bending angles work together. The first scraper 38 is responsible for quickly removing a large area of silt, creating a better operating space for the second scraper 39, and the second scraper 39 focuses on detail cleaning. This combination method improves the overall silt cleaning effect and shortens the silt cleaning time.

[0025] In pile holes with different diameters, due to the small bending angle of the first scraper 38, it can also better fit the hole wall for silt cleaning operations in small-diameter pile holes. In large-diameter pile holes, the second scraper 39 with a larger bending angle can better cover the area of the hole wall to ensure the silt cleaning effect. The two can be matched to adapt to the silt cleaning work of pile holes with various diameters; in addition, the inner wall of the pile hole may not be a completely regular circle, there may be local concavities, convexities or inclinations. The first scraper 38 can adapt to the relatively flat part of the hole wall, and the second scraper 39 can better adapt to the concave and convex changes of the hole wall with a larger bending angle, and closely fit the uneven part of the hole wall to ensure that the silt cleaning work can be effectively carried out on hole walls of various shapes.

[0026] The coordinated work of the first scraper 38 and the second scraper 39 enables the inner wall of the pile hole to be cleaned targeted. No matter how complex the hole wall situation is, it can ensure the stability of the silt cleaning quality and avoid affecting the subsequent construction due to incomplete or uneven silt cleaning; by opening a relief groove 37 on the side of the positioning plate 36, when cleaning the inner wall of the pile hole, at the beginning of the contact cleaning work, a large amount of silt adheres to the positioning plate 36, which will interfere with the movement direction of the positioning plate 36. By setting the relief groove 37, the phenomenon of silt adhering to the positioning plate 36 can be reduced during the contact cleaning work.

[0027] Please refer to Figures 7 - 9, the extraction component 2 includes an extraction housing 21, the bottom of the extraction housing 21 is fixedly connected to the top of the main body 1, a middle part inside the extraction housing 21 is fixedly connected with an extraction pipe 22, the bottom of the extraction pipe 22 is fixedly connected with a fixing plate 24, the extraction pipe 22 penetrates through the inside of the fixing plate 24, a pump body mechanism 23 is fixedly connected to the outer side surface of the extraction pipe 22, the bottom of the fixing plate 24 is fixedly connected with a feeding housing 27, a pair of opening grooves are symmetrically formed in the side surface of the feeding housing 27, the bottom of the feeding housing 27 is fixedly connected with a circular plate 28, arc grooves are formed on both sides of the circular plate 28, the bottom of the circular plate 28 is fixedly connected with a feeding sleeve 26, the bottom of the feeding sleeve 26 is fixedly connected to the top plate 7, and a moving mechanism 25 is connected to the top of the circular plate 28.

[0028] After the contact component 3 and the rotating component 4 clean and crush the gravel and silt on the inner wall of the pile hole, an appropriate amount of water is injected into the bored cast-in-place pile. After the sediment and water are evenly mixed, the driving member 6 is started. The output end of the driving member 6 drives the spiral blade 5 to rotate, so that the spiral blade 5 drives the silt and gravel in the pile hole to move upward in the main body 1, and continuously moves upward through the discharge groove on the top plate 7 until it enters the feeding housing 27 through the feeding sleeve 26. At the same time, the silt and gravel are continuously driven upward by the spiral blade 5, so that the silt in the feeding housing 27 passes through the opening grooves on both sides of the feeding housing 27. At the same time, the pump body mechanism 23 is started, so that the pump body mechanism 23 pumps the silt and mud entering the feeding housing 27 upward. At the same time, by externally connecting a pipeline and a storage tank to the top of the extraction pipe 22, the collected treatment work of the mud and silt extracted by the pump body mechanism 23 is carried out.

[0029] Please refer to Figure 10 , the moving mechanism 25 includes a cross bar 251, guide rods 252 are fixedly connected to the left and right sides of the cross bar 251, a circular rod 253 is fixedly connected to the end of the guide rod 252 away from the cross bar 251, moving plates 254 are fixedly connected to the upper and lower ends of the circular rod 253, a moving frame 255 is fixedly connected to the top of the cross bar 251, an arc plate 256 is fixedly connected to the outside of the moving frame 255, the bottom of the cross bar 251 is slidably connected to the middle part of the circular plate 28, and a connecting spring 257 is sleeved on the bottom of the cross bar 251; the side surfaces of the two moving plates 254 are respectively in contact with the side wall of the feeding sleeve 26 and the side wall of the feeding housing 27, the outer side surface of the arc plate 256 is in contact with the inner side of the extraction pipe 22, the top of the connecting spring 257 is fixedly connected to the middle part of the side surface of the cross bar 251, and the bottom of the connecting spring 257 is fixedly connected to the top of the circular plate 28.

[0030] When the pump body mechanism 23 pumps the slurry and silt in the extraction pipe 22, the suction force of the pump body mechanism 23 causes the moving frame 255 to move upward along with the slurry and silt. At the same time, the moving frame 255 pulls the cross bar 251 upward, and the cross bar 251 pulls the connecting spring 257. The cross bar 251 drives the round bar 253 and the moving plate 254 to move upward through the guide rods 252 on the left and right sides, so that the two moving plates 254 move in the inner cavities of the feeding sleeve 26 and the feeding housing 27.

[0031] More specifically, when the extraction work of the silt in the pile hole is completed, the pump body mechanism 23 is closed, and the extraction work in the pile hole is stopped. Driven by the stretching and reset of the connecting spring 257, the cross bar 251 drives the arc plate 256 to move downward in the inner cavity of the extraction pipe 22 through the moving frame 255, so that the arc plate 256 cleans the inner wall of the extraction pipe 22. At the same time, the cross bar 251 drives the upper and lower moving plates 254 to move downward on the side walls of the feeding sleeve 26 and the feeding housing 27 through the guide rods 252 and the round bar 253, so as to clean the side walls of the feeding sleeve 26 and the feeding housing 27, avoiding the phenomenon that the silt and slurry remain and dry on the side walls of the extraction pipe 22, the feeding sleeve 26 and the feeding housing 27, preventing these substances from blocking the pipeline, ensuring that the extraction pipe 22 always maintains good smoothness, enabling the extraction work to proceed smoothly, and ensuring the efficiency and continuity of the dredging work.

[0032] The embodiment of the present invention also provides a dredging method for a bored cast-in-place pile dredging device, which uses a bored cast-in-place pile dredging device in the above embodiment, and includes the following steps: S1: Lower the whole main body 1 into the pile hole, place the extraction component 2 flush with the ground at the top of the pile hole, and turn on the driving member 6. The driving member 6 drives the spiral blade 5 to rotate inside the main body 1 through its output end; S2: The spiral blade 5 drives the rotating component 4 to crush the sediment at the bottom of the pile hole, and at the same time drives the contact component 3 to scrape the silt on the inner wall of the pile hole; S3: Inject an appropriate amount of water into the bored cast-in-place pile to uniformly mix the sediment with the water, so that the spiral blade 5 drives the silt and gravel accumulated at the bottom of the pile hole to move upward inside the main body 1 and enter the extraction component 2 through the discharge slot of the top plate 7; S4: Turn on the extraction component 2 to transport the silt and gravel inside the pile hole to an external storage box to achieve the dredging operation.

[0033] The structures and working principles of the components in this dredging method have been described in detail in the above embodiments. For specific details, please refer to the content in the above embodiments, and will not be elaborated here.

[0034] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art and related fields based on the embodiments in the present invention without creative efforts shall fall within the scope of protection of the present invention. Structures, devices, and operation methods not specifically described and explained in the present invention shall be implemented by conventional means in the art unless otherwise specified and limited.

Claims

1. A bored pile desilting device, characterized in that: The invention comprises a main body (1), wherein the top of the main body (1) is fixedly connected to an extraction component (2), the inner side of the main body (1) is fixedly connected to a top plate (7), the top of the top plate (7) is symmetrically provided with a discharge trough, the middle of the top of the top plate (7) is fixedly connected to a driving component (6), the bottom of the top plate (7) is rotatably connected to a spiral blade (5), the top of the spiral blade (5) is fixedly connected to the output end of the driving component (6), and the bottom of the spiral blade (5) is fixedly connected to a rotating component (4); A contact component (3), the contact component (3) being used to clean the inner wall of the bored pile, the inner side of the contact component (3) being rotatably connected to the outer side surface of the main body (1); The contact component (3) comprises a plurality of contact frames (31) and a plurality of fixed shafts (32), wherein the plurality of fixed shafts (32) are connected to the plurality of contact frames (31) from top to bottom, wherein a plurality of evenly distributed hydraulic cylinders (33) are fixedly connected to the inner side of the contact frame (31), wherein the output end of the hydraulic cylinder (33) is fixedly connected to a positioning frame (34), wherein a pair of positioning shafts (35) are symmetrically arranged on a side of the positioning frame (34) away from the hydraulic cylinder (33), wherein one end of the positioning shaft (35) away from the positioning frame (34) is fixedly connected to a positioning plate (36), wherein a clearance groove (37) is provided in the middle of the positioning plate (36), wherein one end of the positioning plate (36) is fixedly connected to a first scraper (38), and the end of the positioning plate (36) away from the first scraper (38) is fixedly connected to a second scraper (39).

2. A bored pile desilting device according to claim 1, characterized in that: The number of the contact frames (31) is four, and the four contact frames (31) are evenly distributed on the outer side surface of the main body (1) from top to bottom. The number of the fixed shafts (32) is three, and the three fixed shafts (32) are evenly distributed on the contact frames (31). The upper and lower ends of the fixed shafts (32) are respectively fixedly connected to the bottom surface of the uppermost contact frame (31) and the top surface of the lowermost contact frame (31).

3. A bored pile desilting device according to claim 1, characterized in that: The rotating component (4) comprises a rotating frame (41), a plurality of evenly distributed crushing pieces (42) are fixedly connected to the side of the rotating frame (41), a connecting block (43) is fixedly connected to the bottom of the rotating frame (41), a plurality of evenly distributed connecting rods (48) are fixedly connected to the side of the connecting block (43), a connecting shaft (44) is fixedly connected to the bottom of the connecting block (43), a bottom plate (45) is rotatably connected to the bottom of the connecting shaft (44), a plurality of pairs of connecting frames (46) are evenly fixedly connected to the side of the connecting shaft (44), each pair of connecting frames (46) is symmetrically arranged in an upper and lower manner, and one end of the same pair of connecting frames (46) away from the connecting shaft (44) is fixedly connected to the same arc frame (47).

4. A bored pile desilting device according to claim 3, characterized in that: The top of the rotating frame (41) is fixedly connected to the bottom of the spiral blade (5), the top of the connecting rod (48) is fixedly connected to the bottom surface of the lowest contact frame (31), the number of the connecting frames (46) is three pairs, and the three pairs of connecting frames (46) are evenly arranged on the side of the connecting shaft (44).

5. A bored pile desilting device according to claim 1, characterized in that: The extraction component (2) comprises an extraction shell (21), an extraction pipe (22) is fixedly connected to the middle of the inner side of the extraction shell (21), a fixing plate (24) is fixedly connected to the bottom of the extraction pipe (22), the extraction pipe (22) passes through the inner side of the fixing plate (24), a pump body mechanism (23) is fixedly connected to the outer side of the extraction pipe (22), a feed shell (27) is fixedly connected to the bottom of the fixing plate (24), a circular plate (28) is fixedly connected to the bottom of the feed shell (27), circular arc grooves are formed on both sides of the circular plate (28), a feeding sleeve (26) is fixedly connected to the bottom of the circular plate (28), and a moving mechanism (25) is connected to the top of the circular plate (28).

6. A bored pile desilting device according to claim 5, characterized in that: The bottom of the extraction shell (21) is fixedly connected to the top of the main body (1), the bottom of the feeding sleeve (26) is fixedly connected to the top plate (7), and a pair of opening grooves are symmetrically provided on the side of the feeding shell (27).

7. A bored pile desilting device according to claim 6, characterized in that: The moving mechanism (25) comprises a cross rod (251), the left and right sides of the cross rod (251) are fixedly connected to guide rods (252), one end of the guide rod (252) away from the cross rod (251) is fixedly connected to a round rod (253), the upper and lower ends of the round rod (253) are fixedly connected to a moving plate (254), the top of the cross rod (251) is fixedly connected to a moving frame (255), the outer side of the moving frame (255) is fixedly connected to an arc plate (256), the bottom of the cross rod (251) is slidably connected to the middle of the round plate (28), and the bottom of the cross rod (251) is sleeved with a connecting spring (257).

8. A bored pile desilting device according to claim 7, characterized in that: The side surfaces of the two movable plates (254) are in contact with the side walls of the loading sleeve (26) and the side walls of the feeding shell (27), respectively; the outer side surface of the arc plate (256) is in contact with the inner side of the extraction tube (22); the top of the connecting spring (257) is fixedly connected to the middle part of the side surface of the cross rod (251); and the bottom of the connecting spring (257) is fixedly connected to the top of the circular plate (28).

9. A dredging method for a bored pile dredging device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: The main body (1) is lowered as a whole into the pile hole, the extraction component (2) is placed flush with the ground at the top of the pile hole, the driving member (6) is turned on, and the spiral blade (5) is driven to rotate inside the main body (1) through the output end of the driving member (6); S2: The spiral blade (5) drives the rotating component (4) to crush the sediment at the bottom of the pile hole, and at the same time drives the contact component (3) to scrape the silt on the inner wall of the pile hole; S3: injecting an appropriate amount of water into the bored pile to uniformly mix the sediment with the water, so that the spiral blade (5) drives the silt and gravel accumulated at the bottom of the pile hole to move upward inside the main body (1) and enter the extraction component (2) through the discharge trough of the top plate (7); S4: Open the extraction component (2) to transport the silt and gravel inside the pile hole to the external storage box to achieve dredging operation.

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