Reverse circulation pile foundation hole cleaning device

Abstract

The utility model relates to the technical field of pile foundation construction, in particular to a reverse circulation pile foundation hole cleaning device which comprises a pouring part, an adjusting part, a cleaning part and a detecting part, the pouring part comprises a connecting block and a guide pipe, the connecting block is fixedly arranged above the guide pipe, and the adjusting part comprises two adjusting semi-rings. The two adjusting semi-rings are buckled on the upper portion of the guide pipe and are fixedly connected through bolts, the adjusting semi-rings are movably connected with the upper end of the reinforcement cage through the adjusting hydraulic cylinders and the clamping blocks, the guide pipe and the reinforcement cage are concentrically arranged, and at most one of the cleaning part and the detecting part is connected with the connecting block. And the connecting block is fixedly connected with the cleaning part or the detection part through an arc-shaped plate. According to the utility model, the adjusting part not only can keep the guide pipe and the reinforcement cage concentrically arranged, but also can adjust the height of the guide pipe to deal with emergencies, and the arranged cleaning part and the detection part are both connected with the connecting block in an inserting manner and are fastened through the arc-shaped plate, so that the corresponding parts are more convenient to disassemble and assemble.

Description

Technical Field

[0001] This utility model relates to the field of pile foundation construction technology, specifically to a reverse circulation pile foundation hole cleaning device. Background Technology

[0002] Wind power projects often need to be carried out under various complex geological conditions. With the continuous development of wind power technology, the single unit capacity and size of wind turbine generators are constantly increasing, and the requirements for the diameter and bearing capacity of pile foundations are also getting higher and higher. For some areas with relatively poor geology, such as soils of silty clay and fine sand, the use of traditional drilling technology can easily lead to pile foundation hole collapse, affecting the construction period. However, reverse circulation pile foundation drilling technology can cope with these complex geological conditions and ensure the stability and safety of the pile foundation.

[0003] Cleaning the reverse circulation pile foundation borehole is a crucial step in ensuring pile quality and bearing capacity. Its core objective is to ensure a clean borehole bottom and stable borehole walls, creating favorable conditions for subsequent reinforcement cage placement and concrete pouring. After the initial cleaning meets the standards, the reinforcement cage is lowered, followed by the grouting guide pipe. For pile foundation boreholes with poor soil conditions, a secondary cleaning is required before concrete pouring. The guide pipe itself serves as the cleaning channel, removing suspended and settled drill cuttings from the borehole bottom and replacing the thick mud. After the secondary cleaning, the sediment in the borehole needs to be tested, including its thickness and... Concrete pouring should begin as soon as the mud in the borehole meets the required standards. During the borehole cleaning process, it is necessary to ensure that the guide pipe is concentric with the reinforcing cage and to prevent the guide pipe from shifting. If the pile foundation borehole collapses or the ventilation duct breaks or becomes blocked, the height of the guide pipe needs to be adjusted for repair. In existing technologies, the guide pipe is generally fixed to the reinforcing cage by guide bars and positioning brackets, which is inconvenient to disassemble and assemble. When the guide pipe needs to be moved, it needs to be disassembled and assembled repeatedly, which is quite cumbersome. If the guide pipe shifts during construction, it cannot be adjusted in time. In addition, traditional ventilation ducts are easily blocked by mud and sand. If the pipe is lifted for cleaning, it will be time-consuming and affect the construction period. Utility Model Content

[0004] The main purpose of this invention is to provide a reverse circulation pile foundation hole cleaning device, which can effectively solve the above-mentioned problems.

[0005] This utility model provides the following technical solution: a reverse circulation pile foundation hole cleaning device, including a grouting section, an adjustment section, a cleaning section, and a detection section. The grouting section includes a connecting block and a guide pipe. The connecting block is fixedly installed above the guide pipe. The adjustment section includes two adjusting semi-rings. The two adjusting semi-rings are fastened to the upper part of the guide pipe and connected by bolts. The adjusting semi-rings are movably connected to the upper end of the reinforcing cage through an adjusting hydraulic cylinder and a clamping block. The guide pipe and the reinforcing cage are concentrically arranged. At most one of the cleaning section and the detection section is connected to the connecting block at the same time. The connecting block is fastened to the cleaning section or the detection section through an arc-shaped plate.

[0006] Furthermore, the clamping block has multiple tightening screws threadedly connected to its sidewall. An inner plate and an outer plate are fixedly installed on both sides of the lower end of the clamping block, and the reinforcing bars at the upper end of the reinforcing cage are located between the inner plate and the outer plate. Multiple tightening hydraulic cylinders are rotatably installed on the outer side of the adjusting half-ring along the circumferential direction. The piston rod end of the tightening hydraulic cylinder is rotatably connected to the clamping block, and the end of the tightening screw abuts against the reinforcing cage.

[0007] Furthermore, a locking hole is provided through the middle of the connecting block, and multiple clearance grooves are provided circumferentially on the inner wall of the locking hole. A receiving groove is provided in the middle of the bottom surface of the clearance groove, and a clamping hydraulic cylinder is provided in the receiving groove. The arc plate is fixedly connected to the end of the piston rod of the clamping hydraulic cylinder. When the arc plate is not extended, it is located in the clearance groove.

[0008] Furthermore, the cleaning unit includes a first support plate, on the upper surface of which an air lift connector is fixedly installed. A slag discharge pipe is installed at the upper end of the air lift connector. An air duct and a backflushing pipe are installed on the side wall of the air lift connector. The end of the backflushing pipe located outside the air lift connector is connected to the air duct through a valve. After passing through the side wall of the air lift connector, both the air duct and the backflushing pipe extend towards the bottom of the guide tube.

[0009] Furthermore, an annular diverter is fixedly sleeved on the lower outer side of the air duct, the lower end of the backwash pipe is connected to the inlet at the upper end of the annular diverter, and multiple outlets at the lower end of the annular diverter are connected to diverter pipes. The ends of the diverter pipes extend to the lower port of the air duct, and nozzles are provided at the lower end of the diverter pipes, with the nozzles facing the inside of the air duct.

[0010] Furthermore, the detection unit includes a second support plate and a sediment analyzer. Two vertical plates are fixedly spaced on one side of the upper surface of the second support plate, and a feeding roller is rotatably arranged between the two vertical plates. A detection hole is opened through the middle of the second support plate, and fixed plates are fixedly arranged on both sides of the detection hole. A pulley is rotatably arranged between the two fixed plates. The cable end of the feeding roller passes around the pulley and is connected to the upper end of the sediment analyzer. The sediment analyzer is concentrically arranged with the detection hole.

[0011] Furthermore, a first connecting post is fixedly provided at the lower end of the first support plate, and a first connecting groove is provided in the middle of the outer side of the first connecting post. A second connecting post is fixedly provided at the lower end of the second support plate, and a second connecting groove is provided in the middle of the outer side of the second connecting post. The first connecting post or the second connecting post is inserted into the locking hole, and the arc-shaped plate abuts against the first connecting groove or the second connecting groove.

[0012] Furthermore, when the detection unit is connected to the grouting unit, the detection hole is connected to the bottom of the pile hole through the inner cavity of the second connecting column, the locking hole, and the inner cavity of the guide tube. When the cleaning unit is connected to the grouting unit, the slag discharge pipe is connected to the inside of the guide tube through the air lift joint and the inner cavity of the first connecting column.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In this utility model, the adjustment part can not only keep the guide pipe and the steel cage concentric, but also adjust the height of the guide pipe to deal with emergencies. The cleaning part and the detection part are both inserted into the connecting block and fastened by the arc plate, making the disassembly and assembly of the corresponding parts more convenient.

[0015] 2. In this utility model, a backflush pipe is installed next to the air duct. The end of the backflush pipe is connected to the lower port of the air duct through an annular diverter and a diverter pipe. When the air duct is blocked, the air inlet is connected to the backflush pipe by rotating the valve. The blockage is quickly cleared by the reverse airflow, thus improving the cleaning quality.

[0016] 3. In this utility model, the cleaning section and the testing section can be quickly switched, reducing construction time and facilitating subsequent concrete pouring. Furthermore, the sediment measuring instrument is limited by pulleys, which ensures that it remains concentric with the guide tube during descent and will not touch the inner wall of the guide tube, thus avoiding affecting the test results. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure in the cleaning state of this utility model;

[0019] Figure 2 This is a schematic diagram of the disassembled structure of the cleaning section and the conduit in the cleaning state of this utility model;

[0020] Figure 3 This is a schematic diagram of the end structure of the air duct of this utility model;

[0021] Figure 4 This is a schematic diagram of the detection state structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the disassembled structure of the detection unit and the conduit under the detection state of this utility model;

[0023] Figure 6 This is a schematic diagram of the catheter part of this utility model;

[0024] Figure 7 This is a schematic diagram of the adjustment part of this utility model;

[0025] Figure 8 This is a schematic diagram of the clamping block structure of this utility model.

[0026] In the diagram: 1. Reinforcing cage; 2. Pouring section; 21. Connecting block; 211. Receiving groove; 212. Clearance groove; 213. Locking hole; 22. Guide tube; 221. Mounting groove; 222. Positioning block; 23. Tightening hydraulic cylinder; 24. Arc plate; 3. Adjusting section; 31. Adjusting semi-ring; 311. Fixing seat; 312. Positioning groove; 32. Adjusting hydraulic cylinder; 33. Clamping block; 331. Outer plate; 332. Inner plate; 333. Tightening screw; 334. Connecting seat; 4. Cleaning section; 41. Air lift 42. Connector; 43. Slag discharge pipe; 44. Air duct; 45. Through hole; 46. Backflush pipe; 47. Annular diverter; 48. Diverter pipe; 49. Valve; 40. First support plate; 41. First connecting column; 42. First connecting groove; 43. Fixing ring; 44. Air inlet; 5. Detection unit; 55. Vertical plate; 56. Motor; 57. Feeding roller; 58. Fixing plate; 59. Pulley; 50. Sludge measuring instrument; 51. Second support plate; 52. Second connecting column; 53. Second connecting groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Specific implementation examples Figure 1-8 As shown: A reverse circulation pile foundation hole cleaning device includes a grouting section 2, an adjustment section 3, a cleaning section 4, and a detection section 5. The grouting section 2 includes a connecting block 21 and a guide pipe 22. The connecting block 21 is fixedly installed above the guide pipe 22. The adjustment section 3 includes two adjusting semi-rings 31. The two adjusting semi-rings 31 are fastened to the upper part of the guide pipe 22 and connected by bolts. The adjusting semi-rings 31 are movably connected to the upper end of the reinforcing cage 1 through an adjusting hydraulic cylinder 32 and a clamping block 33. The guide pipe 22 and the reinforcing cage 1 are arranged concentrically. At most one of the cleaning section 4 and the detection section 5 is connected to the connecting block 21 at the same time. The connecting block 21 is fastened to the cleaning section 4 or the detection section 5 through an arc plate 24.

[0029] Furthermore, an inner plate 332 and an outer plate 331 are fixedly installed on both sides of the lower end of the clamping block 33, respectively. The steel bars at the upper end of the steel cage 1 are located between the inner plate 332 and the outer plate 331. The inner plate 332 and the outer plate 331 can be arc-shaped or straight. When the inner plate 332 and the outer plate 331 are straight, the width of the inner plate 332 is smaller than the width of the outer plate 331, so that the clamping block 33 can smoothly clamp the steel bars on the steel cage 1. Multiple fixed seats 311 are fixedly installed at intervals along the circumference on the outer side of the adjusting semi-ring 31. The cylinder body of the tightening hydraulic cylinder 23 is rotatably connected to the corresponding fixed seat 311. A connecting seat 334 is fixedly installed on the upper surface of the clamping block 33. The piston rod end of the tightening hydraulic cylinder 23 is rotatably connected to the connecting seat 334. Multiple tightening screws 333 are threadedly connected to both sides of the outer plate 331. The ends of the tightening screws 333 abut against the steel cage 1.

[0030] The upper end of the conduit 22 is provided with an installation groove 221. Two sets of positioning blocks 222 are symmetrically arranged on the outer wall of the installation groove 221. Multiple positioning grooves 312 are spaced apart along the circumference on the inner wall of the adjusting half-ring 31. One adjusting half-ring 31 corresponds to one set of positioning blocks 222. Multiple positioning grooves 312 are inserted into the multiple positioning blocks 222 of the corresponding set. After the two adjusting half-rings 31 are assembled, they are fastened with bolts. The positioning blocks 222 and positioning grooves 312 can prevent the adjusting half-ring 31 from rotating relative to the conduit 22, which would affect the construction.

[0031] Furthermore, a locking hole 213 is provided through the middle of the connecting block 21. Multiple clearance grooves 212 are provided circumferentially on the inner wall of the locking hole 213. A receiving groove 211 is provided in the middle of the bottom surface of the clearance groove 212. A clamping hydraulic cylinder 23 is provided in the receiving groove 211. An arc plate 24 is fixedly connected to the piston rod end of the clamping hydraulic cylinder 23. When the arc plate 24 is not extended, it is located in the clearance groove 212.

[0032] Furthermore, the cleaning unit 4 includes a first support plate 46, on the upper surface of the first support plate 46 is a fixed air lift connector 41, the upper end of the air lift connector 41 is provided with a slag discharge pipe 42, and the side wall of the air lift connector 41 is provided with an air duct 43 and a backflushing pipe 44. Both the air duct 43 and the backflushing pipe 44 are L-shaped. The end of the backflushing pipe 44 located outside the air lift connector 41 is connected to the air duct 43 through a valve 45. After passing through the side wall of the air lift connector 41, both the air duct 43 and the backflushing pipe 44 extend towards the bottom of the guide tube 22.

[0033] Furthermore, an annular diverter 441 is fixedly sleeved on the lower outer side of the air duct 43. The lower end of the backflushing pipe 44 is connected to the inlet at the upper end of the annular diverter 441. Multiple outlets at the lower end of the annular diverter 441 are connected to diverting pipes 442. The ends of the diverting pipes 442 extend to the lower port of the air duct 43. A nozzle is provided at the lower end of the diverting pipe 442, facing the inside of the air duct 43. Multiple sets of through holes 431 are opened circumferentially through the lower end of the air duct 43. Multiple fixing rings 48 are spaced apart at the lower end of the air duct 43, and the fixing rings 48 fix the multiple diverting pipes 442. A backflushing pipe 44 is provided next to the air duct 43. The end of the backflushing pipe 44 is connected to the lower port of the air duct 43 through the annular diverter 441 and the diverting pipes 442. When the air duct 43 is blocked, the air inlet 49 is connected to the backflushing pipe 44 by rotating the valve 45, and the blockage is quickly cleared by the reverse airflow, improving the cleaning quality.

[0034] Furthermore, the detection unit 5 includes a second support plate 56 and a sediment analyzer 55. Two vertical plates 51 are fixedly spaced on one side of the upper surface of the second support plate 56. A feeding roller 52 is rotatably arranged between the two vertical plates 51. A motor 511 is arranged on the outside of one of the vertical plates 51. The output shaft end of the motor 511 passes through the corresponding vertical plate 51 and is fixedly connected to the feeding roller 52. A detection hole is opened through the middle of the second support plate 56. Fixing plates 53 are fixedly arranged on both sides of the detection hole. A pulley 54 is rotatably arranged between the two fixing plates 53. The cable end of the feeding roller 52 passes around the pulley 54 and is connected to the upper end of the sediment analyzer 55. The sediment analyzer 55 is concentrically arranged with the detection hole.

[0035] Furthermore, a sealing ring is provided on the lower surface of the first support plate 46, and a first connecting post 47 is fixedly provided at the lower end of the first support plate 46. A first connecting groove 471 is opened in the middle of the outer side of the first connecting post 47. A second connecting post 57 is fixedly provided at the lower end of the second support plate 56. A second connecting groove 571 is opened in the middle of the outer side of the second connecting post 57. The first connecting post 47 or the second connecting post 57 is inserted into the locking hole 213, and the arc plate 24 abuts against the first connecting groove 471 or the second connecting groove 571.

[0036] Furthermore, the two ends of the arc plate 24 away from the clamping hydraulic cylinder 23 are chamfered so that the arc plate 24 will not affect the installation of the cleaning part 4 or the detection part 5 when it is housed in the clearance groove 212.

[0037] Furthermore, when the detection unit 5 is connected to the grouting unit 2, the detection hole is connected to the bottom of the pile hole through the inner cavity of the second connecting column 57, the locking hole 213, and the inner cavity of the guide tube 22. When the cleaning unit 4 is connected to the grouting unit 2, one end of the slag discharge pipe 42 is connected to the inside of the guide tube 22 through the air lift connector 41 and the inner cavity of the first connecting column 47, and the other end of the slag discharge pipe 42 is connected to the sedimentation tank through the pipeline. The air duct 43 is provided with an air inlet 49 at the end away from the air lift connector 41. The air inlet 49 is connected to the air compressor through the pipeline. The valve 45 is a three-way valve. Turning the valve 45 can connect the air inlet 49 to the air duct 43 or the backflush pipe 44. The cleaning unit 4 and the detection unit 5 can be quickly switched, reducing construction time and facilitating subsequent concrete pouring. Moreover, the sediment measuring instrument 55 is limited by the pulley 54, and can remain concentric with the guide tube 22 during the descent process, without touching the inner wall of the guide tube 22, thus avoiding affecting the detection results.

[0038] When a reverse circulation pile foundation hole cleaning device is in use, after the steel cage 1 is lowered and fixed, two adjusting half rings 31 are inserted into the installation groove 221, and the corresponding positioning blocks 222 are inserted into the corresponding positioning grooves 312. After the two adjusting half rings 31 are assembled, they are fastened with bolts. The angle of the adjusting hydraulic cylinder 32 is adjusted so that the steel bar at the top of the steel cage 1 is inserted between the inner plate 332 and the outer plate 331 of the clamping block 33. Then the tightening screw 333 is rotated so that the end of the tightening screw 333 abuts against the steel bar of the steel cage 1. At this time, the clamping block 33 is fastened to the steel cage 1. The overall up and down movement of the guide tube 22 can be adjusted by adjusting the action of the hydraulic cylinder 32, and the guide tube 22 and the steel cage 1 can also be kept concentric.

[0039] During the secondary cleaning process, the cleaning unit 4 is hoisted above the guide pipe 22, allowing the first connecting column 47 to be inserted into the locking hole 213. Once the lower surface of the first support plate 46 abuts against the upper surface of the connecting block 21, the hoist separates from the cleaning unit 4. The tightening hydraulic cylinder 23 is then activated, extending its piston rod and causing the arc-shaped plate 24 to be inserted into the first connecting groove 471, thus securing the cleaning unit 4 to the guide pipe 22. The slag discharge pipe 42 is then connected to the sedimentation tank via a pipeline, and the air compressor is then connected via another pipeline. Connecting to the air inlet 49, the air compressor is started, and air enters the lower part of the duct 22 through the air inlet 49 and the air duct 43. The sediment mixed with mud in the pile hole rises from the duct 22 to the air lift joint 41, and then flows into the sedimentation tank through the slag discharge pipe 42. When the end of the air duct 43 is blocked, the valve 45 is rotated to connect the air inlet 49 with the backflush pipe 44. Air passes through the backflush pipe 44, the annular diverter 441, and the diverter pipe 442 and is sprayed out from the nozzle to clean the end of the air duct 43.

[0040] When checking the thickness of the sediment after cleaning the hole, the tightening hydraulic cylinder 23 is moved in the opposite direction, the arc plate 24 is separated from the first connecting groove 471, and then the pipe between the slag outlet pipe 42 and the sedimentation tank, and the pipe between the air inlet 49 and the air compressor are removed. The cleaning part 4 is lifted away, and the detection part 5 is lifted to the upper part of the guide tube 22. The second connecting column 57 is inserted into the locking hole 213. The tightening hydraulic cylinder 23 is started to insert the arc plate 24 into the second connecting groove 571. At this time, the detection part 5 is firmly connected to the guide tube 22. The motor 511 is started to make the sediment measuring instrument 55 slowly descend, and the detection work can be carried out. After the quality is qualified, the detection part 5 is removed, the lower end of the pouring funnel is inserted into the locking hole 213, and the arc plate 24 is used to lock the pouring funnel and seal the interface. Then the concrete pouring work can be carried out. When in use, the device has an adjustment section 3 that can not only keep the guide tube 22 concentric with the steel cage 1, but also adjust the height of the guide tube 22 to deal with emergencies. The cleaning section 4 and the detection section 5 are both inserted into the connecting block 21 and fastened by the arc plate 24, making the disassembly and assembly of the corresponding components more convenient.

Claims

1. A reverse circulation pile foundation hole cleaning device, characterized in that: The device includes a grouting section, an adjustment section, a cleaning section, and a testing section. The grouting section includes a connecting block and a guide tube. The connecting block is fixedly installed above the guide tube. The adjustment section includes two adjusting semi-rings. The two adjusting semi-rings are fastened to the upper part of the guide tube and secured with bolts. The adjusting semi-rings are movably connected to the upper end of the reinforcing cage through an adjusting hydraulic cylinder and a clamping block. The guide tube and the reinforcing cage are concentrically arranged. At most one of the cleaning section and the testing section is connected to the connecting block at any given time. The connecting block is securely connected to the cleaning section or the testing section through an arc-shaped plate.

2. The reverse circulation pile foundation hole cleaning device according to claim 1, characterized in that: Multiple tightening screws are threadedly connected to the side wall of the clamping block. An inner plate and an outer plate are fixedly installed on both sides of the lower end of the clamping block, respectively. The steel bars at the upper end of the steel cage are located between the inner plate and the outer plate. Multiple tightening hydraulic cylinders are rotatably installed on the outer side of the adjusting half ring along the circumferential direction. The piston rod end of the tightening hydraulic cylinder is rotatably connected to the clamping block, and the end of the tightening screw abuts against the steel cage.

3. The reverse circulation pile foundation hole cleaning device according to claim 1, characterized in that: The connecting block has a locking hole through the middle, and multiple clearance grooves are spaced apart along the circumference on the inner wall of the locking hole. A receiving groove is formed in the middle of the bottom surface of the clearance groove. A clamping hydraulic cylinder is installed in the receiving groove. An arc plate is fixedly connected to the end of the piston rod of the clamping hydraulic cylinder. When the arc plate is not extended, it is located in the clearance groove.

4. The reverse circulation pile foundation hole cleaning device according to claim 1, characterized in that: The cleaning section includes a first support plate, on the upper surface of which an air lift connector is fixedly installed. A slag discharge pipe is installed at the upper end of the air lift connector. An air duct and a backflushing pipe are installed on the side wall of the air lift connector. The end of the backflushing pipe located outside the air lift connector is connected to the air duct through a valve. After passing through the side wall of the air lift connector, both the air duct and the backflushing pipe extend towards the bottom of the guide tube.

5. The reverse circulation pile foundation hole cleaning device according to claim 4, characterized in that: An annular diverter is fixedly fitted on the lower outer side of the air duct. The lower end of the backflushing pipe is connected to the inlet at the upper end of the annular diverter. Diverting pipes are connected to multiple outlets at the lower end of the annular diverter. The ends of the diverting pipes extend to the lower port of the air duct. A nozzle is provided at the lower end of the diverting pipe, with the nozzle facing the inside of the air duct.

6. The reverse circulation pile foundation hole cleaning device according to claim 4, characterized in that: The detection unit includes a second support plate and a sediment analyzer. Two vertical plates are fixedly spaced on one side of the upper surface of the second support plate. A feeding roller is rotatably arranged between the two vertical plates. A detection hole is opened through the middle of the second support plate. Fixed plates are fixedly arranged on both sides of the detection hole. A pulley is rotatably arranged between the two fixed plates. The cable end of the feeding roller passes around the pulley and is connected to the upper end of the sediment analyzer. The sediment analyzer is concentrically arranged with the detection hole.

7. The reverse circulation pile foundation hole cleaning device according to claim 6, characterized in that: A first connecting post is fixedly installed at the lower end of the first support plate, and a first connecting groove is opened in the middle of the outer side of the first connecting post. A second connecting post is fixedly installed at the lower end of the second support plate, and a second connecting groove is opened in the middle of the outer side of the second connecting post. The first connecting post or the second connecting post is inserted into the locking hole, and the arc plate abuts against the first connecting groove or the second connecting groove.

8. The reverse circulation pile foundation hole cleaning device according to claim 7, characterized in that: When the detection section is connected to the grouting section, the detection hole is connected to the bottom of the pile hole through the inner cavity of the second connecting column, the locking hole, and the inner cavity of the guide tube. When the cleaning section is connected to the grouting section, the slag discharge pipe is connected to the inside of the guide tube through the air lift joint and the inner cavity of the first connecting column.

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