A hole cleaning device for a cast-in-place pile and a cast-in-place pile hole forming method using the same

Abstract

The application relates to a hole cleaning device for a cast-in-place pile and a cast-in-place pile hole forming method using the device, and relates to the field of cast-in-place pile construction. The hole cleaning device comprises a primary slag cleaning assembly, a secondary slag cleaning assembly and a crane for lowering the primary slag cleaning assembly and the secondary slag cleaning assembly into a cast-in-place pile hole. The hole cleaning device further comprises an air compressor which provides air for the primary slag cleaning assembly and the secondary slag cleaning assembly. The primary slag cleaning assembly comprises a slag cleaning barrel, the outer diameter of the slag cleaning barrel is smaller than the diameter of the cast-in-place pile hole, a plurality of air pipes are fixedly connected to the inner bottom wall of the slag cleaning barrel, the upper ends of the air pipes are threadedly connected to the air pipe of the air compressor, the lower ends of the air pipes penetrate through the bottom wall of the slag cleaning barrel, the upper end of the slag cleaning barrel is fixedly connected to a cross beam, the cross beam is fixedly connected to a lifting ring, the lifting ring is located on the axis of the slag cleaning barrel, and the bottom of the outer side wall of the slag cleaning barrel is fixedly connected to a pouring ring. The application has the effect that the hole cleaning operation is convenient for operators.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cast-in-place pile construction, in particular to a hole cleaning device for cast-in-place piles and a cast-in-place pile hole forming method using the same. BACKGROUND

[0002] A full casing full-rotation drilling machine is a full casing construction device capable of driving a casing to rotate 360 degrees, which is used for cast-in-place pile hole forming and has been widely applied to cast-in-place pile construction in karst strata. After drilling is completed, the sediment in the hole needs to be cleaned, and hole cleaning is a necessary process before pouring concrete into the hole. When a full casing full-rotation drilling machine is used for drilling in an underground water-rich stratum, the sediment at the bottom of the casing is usually cleaned by using air-lift reverse circulation.

[0003] Since the operating platform of the full casing full-rotation drilling machine is higher than the ground, and the operating platform of the full casing full-rotation drilling machine is large in size, the air-lift reverse circulation hole cleaning operation in the casing requires the laying of a circulation pipeline. However, there are also mud pits and other equipment on the site, and the site environment is complex, which makes it difficult to lay the circulation pipeline, thereby making it inconvenient for the operator to perform hole cleaning operations. SUMMARY

[0004] In order to facilitate the operator to perform hole cleaning operations, the present application provides a hole cleaning device for cast-in-place piles and a cast-in-place pile hole forming method using the same.

[0005] In a first aspect, the present application provides a hole cleaning device for cast-in-place piles, which adopts the following technical solution:

[0006] A hole cleaning device for cast-in-place piles, comprising a primary sediment cleaning assembly, a secondary sediment cleaning assembly, and a crane for lowering the primary sediment cleaning assembly and the secondary sediment cleaning assembly into a cast-in-place pile hole. The hole cleaning device further comprises an air compressor, which provides air for the primary sediment cleaning assembly and the secondary sediment cleaning assembly. The primary sediment cleaning assembly comprises a sediment cleaning bucket, the outer diameter of which is smaller than the diameter of the cast-in-place pile hole. A plurality of air pipes are fixedly connected to the inner bottom wall of the sediment cleaning bucket. The upper ends of the air pipes are threadedly connected to the air pipe of the air compressor, and the lower ends of the air pipes penetrate the bottom wall of the sediment cleaning bucket. A cross beam is fixedly connected to the upper end of the sediment cleaning bucket, and a lifting ring is fixedly connected to the cross beam. The lifting ring is located on the axis of the sediment cleaning bucket. A pouring ring is fixedly connected to the bottom of the outer lateral wall of the sediment cleaning bucket.

[0007] By adopting the technical scheme, when the drilling is completed, the casing is located in the bored pile hole, the air pipe of the air compressor is connected to the upper end surface of the air pipe, the rope is tied on the lifting ring, the air compressor is started, at this time, the operator controls the crane to lower the slag removal bucket into the bored pile hole, when the bottom surface of the slag removal bucket contacts the hole bottom wall of the bored pile hole, the slag removal bucket is lifted up, so that a gap exists between the bottom surface of the slag removal bucket and the hole bottom wall of the bored pile hole, at this time, the air of the air compressor is sprayed to the bottom of the bored pile hole through the connecting pipe and the air pipe, the air mixes with the mud at the bottom of the bored pile hole, the mixture of the air and the mud carries the sediment to float, when the sediment floats above the slag removal bucket, the sediment is settled into the slag removal bucket under the action of gravity; after the slag removal bucket works for a period of time, the air compressor is turned off, after a period of time, the sediment above the slag removal bucket falls into the slag removal bucket, then the slag removal bucket is pulled out, the rope is tied on the pouring ring, the sediment in the slag removal bucket is poured out by controlling the crane, the slag removal bucket is cleaned with water, the air compressor is started again, the slag removal bucket is lowered to the bottom of the bored pile hole, the above operation is repeated until no sediment is poured out from the slag removal bucket.

[0008] After the first hole cleaning is completed, the crane is used to lower the reinforcement cage into the bored pile hole, then the measuring tool is used to measure the thickness of the sediment at the bottom of the bored pile hole, if the thickness of the sediment does not meet the requirements, the secondary hole cleaning assembly is used to clean the sediment at the bottom of the bored pile hole, during the working process of the secondary hole cleaning assembly, the measuring tool is used to measure the thickness of the sediment at the bottom of the bored pile hole; when the thickness of the sediment at the bottom of the bored pile hole meets the design requirements, the hole cleaning is completed, and the concrete mortar can be poured into the bored pile hole; the structure of the first hole cleaning assembly and the secondary hole cleaning assembly used in the hole cleaning process is simple, which reduces the need to lay pipelines before hole cleaning, and facilitates the hole cleaning operation of the operator.

[0009] Optionally, the secondary sediment removal assembly comprises a sediment removal pipe, the outer diameter of the sediment removal pipe is smaller than the diameter of the bored pile hole, a fixed ring is fixedly connected to the top of the sediment removal pipe, and the upper end of the sediment removal pipe is connected with the air pipe of the air compressor.

[0010] When the hole needs to be cleaned twice, the operator connects the air pipe of the air compressor to the upper end of the slag removal pipe, binds the rope to the fixing ring, and then controls the crane to lower the slag removal pipe to the bottom of the cast-in-place pile hole. When the bottom surface of the slag removal pipe contacts the bottom wall of the cast-in-place pile hole, the slag removal pipe is pulled upward so that the bottom surface of the slag removal pipe has a gap with the bottom wall of the cast-in-place pile hole. Then the air compressor is started, and the air compressor sprays air to the bottom of the cast-in-place pile hole through the slag removal pipe, so that the sediment deposited at the bottom of the cast-in-place pile hole floats up, reducing the thickness of the sediment deposited at the bottom of the cast-in-place pile hole. When the slag removal pipe works for a period of time, the air compressor is turned off, and then a measuring tool is used to measure the thickness of the sediment at the bottom of the cast-in-place pile hole. When the thickness of the sediment does not meet the design requirements, the air compressor is turned on again, and the operator repeats the above operation until the thickness of the sediment at the bottom of the cast-in-place pile hole meets the design requirements. At this time, the air compressor is turned off, and the slag removal pipe is pulled up to the outside of the cast-in-place pile hole. At this time, the hole cleaning is completed, and the cast-in-place pile hole can be filled with concrete mortar.

[0011] Optionally, the slag removal bucket is further provided with a pre-stirring assembly. The pre-stirring assembly comprises a fan wheel rotatably connected to the slag removal bucket. The axial direction of the fan wheel is arranged along the axial direction of the slag removal bucket. The fan wheel is located below the slag removal bucket. The slag removal bucket is provided with a driving member for driving the fan wheel to rotate.

[0012] By adopting the above technical scheme, during the lowering of the slag removal bucket, the driving member drives the fan wheel to rotate, the fan wheel stirs the mud below the slag removal bucket, the mud at the bottom of the slag removal bucket flows, and the mud flow carries the sediment at the bottom of the cast-in-place pile hole into the mud, so that the sediment floats in the mud. After the high-pressure gas is introduced into the sleeve, the sediment can better float to the upper side of the slag removal bucket.

[0013] Optionally, the driving member comprises a rotating shaft rotatably connected to the slag removal bucket. The axial direction of the rotating shaft is arranged along the axial direction of the slag removal bucket. The rotating shaft penetrates the bottom wall of the slag removal bucket. The lower end of the rotating shaft is fixedly connected to the fan wheel. The upper end surface of the rotating shaft is fixedly connected to a main rope winding wheel. The axial direction of the main rope winding wheel is arranged along the axial direction of the rotating shaft. A plurality of auxiliary rope winding wheels are rotatably connected to the outer side wall of the slag removal bucket. The axial directions of the auxiliary rope winding wheels are perpendicular to the axial direction of the slag removal bucket. The auxiliary rope winding wheels are in rolling fit with the inner wall of the sleeve in the cast-in-place pile hole. Two pulling ropes are wound on the main rope winding wheel. One end of one of the pulling ropes, which is away from the main rope winding wheel, penetrates the side wall of the slag removal bucket and is wound on one of the auxiliary rope winding wheels. The other end of the other pulling rope, which is away from the main rope winding wheel, also penetrates the side wall of the slag removal bucket and is wound on the other auxiliary rope winding wheel.

[0014] By adopting the above technical scheme, during the lowering of the slag removal bucket, the slag removal bucket moves to drive the auxiliary rope winding wheel to move relative to the sleeve, so that the auxiliary rope winding wheel rotates. The auxiliary rope winding wheel rotates to wind the pulling rope on the auxiliary rope winding wheel. The movement of the pulling rope drives the main rope winding wheel to rotate. The main rope winding wheel rotates to drive the rotating shaft to rotate. The rotating shaft rotates to drive the fan wheel to rotate.

[0015] Optionally, the slag removal bucket is rotationally connected with a centrifugal bucket, the upper end surface of the centrifugal bucket is lower than the pull rope, a plurality of through holes are formed in the sidewall of the centrifugal bucket, the rotating shaft penetrates the bottom wall of the centrifugal bucket and is fixedly connected with the centrifugal bucket, and the slag removal bucket is further provided with a rotating assembly for driving the centrifugal bucket to rotate.

[0016] By adopting the above technical scheme, in the use of the slag removal bucket, the operator controls the crane to pull the slag removal bucket upward by a distance, the distance of upward movement of the slag removal bucket is not enough to make the sediment in the slag removal bucket float out of the slag removal bucket, and in the process of upward movement of the slag removal bucket, the centrifugal bucket rotates under the action of the rotating assembly, the centrifugal bucket stirs the mud in the slag removal bucket, the flow of the mud makes the sediment in the slag removal bucket float, the space occupied by the sediment in the slag removal bucket is reduced, and therefore the slag removal bucket can collect more sediment, and the frequency of cleaning the slag removal bucket by the operator in the process of cleaning a hole at a time is reduced.

[0017] Optionally, the rotating assembly comprises a reset rod, a thread is formed in the sidewall of the reset rod, a matching groove corresponding to the reset rod is formed in the rotating shaft, a thread is formed in the groove wall of the matching groove, the reset rod is threadedly connected in the matching groove, the reset rod is coaxially arranged with the rotating shaft, the reset rod is simultaneously slidingly inserted in the main rope winding wheel and the cross beam, an installation plate is fixedly connected to the top surface of the reset rod, the installation plate is located above the cross beam, two guide rods are slidingly inserted in the cross beam, the axial direction of the guide rods is along the axial direction of the reset rod, a sleeve corresponding to the guide rods is fixedly connected to the lower surface of the installation plate, each guide rod is slidingly inserted in the corresponding sleeve, a reset spring is fixedly connected to the upper end surface of each guide rod, the upper end of the reset spring is fixedly connected to the inner bottom wall of the sleeve, and the lower end surface of the guide rod is in abutment with the upper end surface of the main rope winding wheel.

[0018] By adopting the above technical scheme, in the process of lowering the slag removal bucket, the rotation of the secondary rope winding wheel drives the rotation of the main rope winding wheel and the rotating shaft, the rotation of the rotating shaft drives the rotation of the centrifugal bucket, the rotating shaft is threadedly connected with the reset rod, so the rotation of the rotating shaft drives the movement of the reset rod, the guide rods guide the reset rod in cooperation with the cross beam, the reset rod drives the downward movement of the installation plate and the sleeve, and the downward movement of the sleeve compresses the reset spring; when the slag removal bucket moves upward, the movement of the slag removal bucket drives the rotation of the secondary rope winding wheel, at this time, the rotation direction of the secondary rope winding wheel is opposite to that when the slag removal bucket moves downward, the rotation of the secondary rope winding wheel releases the pull rope, the reset spring recovers the deformation and pushes the sleeve, the installation plate and the reset rod to move upward at the same time that the pull rope is released, the upward movement of the reset rod drives the rotation of the rotating shaft, the centrifugal bucket and the main rope winding wheel, and the rotation of the main rope winding wheel winds the pull rope on the main rope winding wheel.

[0019] Optionally, a support rod corresponding to the auxiliary rope pulley is vertically fixedly connected to the outer wall of the slag cleaning bucket. A clamping rod is slidably inserted into the end of the support rod away from the slag cleaning bucket. The sliding direction of the clamping rod is perpendicular to the axial direction of the slag cleaning bucket. A clamping spring is fixedly connected to the end of the clamping rod inserted into the support rod. The end of the clamping spring away from the clamping rod is fixedly connected to the support rod. The auxiliary rope pulley is rotatably connected to the end of the clamping rod away from the slag cleaning bucket. The clamping spring is in a compressed state. The auxiliary rope pulley abuts against the inner wall of the sleeve in the grouting pile hole. The friction force generated when the auxiliary rope pulley rolls on the sleeve is greater than the elastic force generated when the clamping spring recovers its deformation.

[0020] By adopting the above technical solution, during the movement of the slag cleaning bucket, the clamping spring causes the clamping rod to slide in the support rod, keeping the auxiliary winding rope wheel in contact with the inner wall of the casing, thereby allowing the auxiliary winding rope wheel to continue rotating.

[0021] Optionally, the end face of the support rod away from the slag cleaning bucket is provided with an insertion groove, the length direction of the insertion groove is perpendicular to the axial direction of the slag cleaning bucket, the clamping rod is slidably inserted into the insertion groove, and the end of the clamping spring away from the clamping rod is fixedly connected to the bottom wall of the insertion groove.

[0022] By adopting the above technical solution, the clamping rod slides in the insertion groove, so that the clamping rod can slide and cooperate with the support rod.

[0023] Secondly, this application provides a method for forming a bored pile, which adopts the following technical solution:

[0024] A method for forming a bored pile, using the aforementioned hole-cleaning equipment, includes the following steps:

[0025] S1. Make preparations before construction, level the site within the construction area, harden the site near the cast-in-place piles, and dig drainage ditches and collection wells near the cast-in-place piles, etc.

[0026] S2. Conduct on-site measurement and layout, mark the center of the cast-in-place pile, then dig a foundation pit around the cast-in-place pile and bury the roadbed plate in the foundation pit;

[0027] S3. Install the drilling rig. After the drilling rig is in place, install the casing and keep the first section of casing vertical.

[0028] S4. The drilling rig works to gradually drill the casing into the ground. During the drilling process, the casing is gradually added. During the drilling process, various parameters of the drilling rig are observed. When the casing has drilled three meters into the ground, soil is removed using a grab bucket.

[0029] S5. After the casing is lowered below the rock surface, use a cross hammer and a grab bucket to remove the rock debris. After drilling to the design elevation of the bottom of the hole, use a grab bucket to clean the bottom of the grouting pile hole, and then notify the relevant personnel for acceptance.

[0030] S6. After the final hole acceptance, use a slag hopper to remove slag from the pile hole. After the slag removal is completed, there is still sediment at the bottom of the pile hole. At this time, use a primary slag cleaning unit to clean the pile hole.

[0031] S7. After the first cleaning is completed, operate the crane to lift the steel cage into the pile hole;

[0032] S8. Place the grouting guide pipe. There is a gap between the lower end face of the guide pipe and the bottom wall of the grouting pile hole. After the guide pipe is installed, a guide pipe support is set up at the casing pipe opening to stabilize the guide pipe.

[0033] S9. After the duct is installed, the concrete mixer truck arrives at the site and measures the thickness of the sediment at the bottom of the pile hole. If the sediment thickness meets the requirements, the pile can be poured. If the sediment thickness does not meet the requirements, the hole needs to be cleaned a second time.

[0034] S10. Use the secondary slag cleaning component to clean the slag in the pile hole. After the secondary slag cleaning component has been working for a period of time, measure the thickness of the slag at the bottom of the pile hole. Once the slag thickness meets the design requirements, lift out the slag cleaning pipe. At this time, concrete can be poured into the pile hole.

[0035] By adopting the above technical solution, the need to lay circulation pipelines during the hole-forming process is reduced, and the convenience of hole cleaning for operators during hole-forming construction is improved.

[0036] In summary, this application includes at least one of the following beneficial technical effects:

[0037] 1. By setting up a slag removal bucket, lifting ring, crossbeam, air duct, tilting ring, crane, air compressor and secondary slag removal components, the need to lay pipelines before cleaning the hole is reduced, making it easier for operators to carry out hole cleaning operations;

[0038] 2. By setting up a fan impeller, rotating shaft, main winding rope wheel, auxiliary winding rope wheel, and pull rope, the sludge floats in the mud. After high-pressure gas is introduced into the casing, the sludge can float to the top of the sludge cleaning bucket better.

[0039] 3. By setting up a centrifuge bucket, guide rod, reset rod, mounting plate, sleeve, and reset spring, the space occupied by sediment in the slag cleaning bucket is reduced, so that the slag cleaning bucket can collect more sediment and reduce the frequency of cleaning the slag cleaning bucket by the operator during a single hole cleaning process. Attached Figure Description

[0040] Figure 1 This is a schematic diagram illustrating the application of the hole cleaning equipment in the grouting pile hole in Embodiment 1 of this application.

[0041] Figure 2 This is a cross-sectional view of the overall structure of the primary slag cleaning component as shown in Embodiment 1 of this application.

[0042] Figure 3 This is a cross-sectional view of Embodiment 1 of this application, illustrating the connection relationship between the air duct and the slag removal bucket.

[0043] Figure 4 This is a cross-sectional view of the overall structure of the secondary slag cleaning component as shown in Embodiment 1 of this application.

[0044] Figure 5 This is a schematic diagram illustrating the overall structure of the primary slag cleaning component in Embodiment 2 of this application.

[0045] Figure 6 This is a cross-sectional view of the overall structure of the primary slag cleaning component as shown in Embodiment 2 of this application.

[0046] Figure 7 This is a cross-sectional view of the structure of the driving component in Embodiment 2 of this application.

[0047] Figure 8 This is a cross-sectional view of the overall structure of the rotating assembly as shown in Embodiment 2 of this application.

[0048] Explanation of reference numerals in the attached drawings: 1. Sleeve; 2. Operating platform; 3. Primary slag cleaning assembly; 31. Slag cleaning bucket; 32. Air duct; 33. Crossbeam; 34. Lifting ring; 35. Tilting ring; 4. Secondary slag cleaning assembly; 41. Slag cleaning pipe; 42. Connector; 43. Fixing ring; 5. Air compressor; 6. Reinforcing cage; 7. Pre-mixing assembly; 71. Rotating shaft; 72. Fan impeller; 73. Drive component; 731. Main rope reel; 7311. Mating groove; 732. Pull rope; 733. Support rod; 7331. Insertion groove; 734. Clamping spring; 735. Clamping rod; 736. Secondary rope reel; 8. Centrifuge tank; 9. Rotating assembly; 91. Reset rod; 92. Guide rod; 93. Mounting plate; 94. Sleeve; 95. Reset spring. Detailed Implementation

[0049] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.

[0050] This application discloses a hole cleaning device for cast-in-place piles.

[0051] Example 1

[0052] Reference Figure 1 Figure 2 ,and Figure 3 A casing 1 is inserted into the bored pile hole, and the casing 1 is coaxial with the bored pile hole. An operating platform 2 for a full-casing 1 full-rotation drilling rig is placed on the ground above the bored pile hole. The hole cleaning equipment includes a primary slag cleaning component 3, which is used to perform the first cleaning of sediment in the hole upon completion of drilling. (Refer to...) Figure 4The hole cleaning equipment also includes a secondary slag cleaning component 4. After the first cleaning of the sediment in the hole, the operator puts the steel cage 6 into the casing 1 using a tool, and then uses a tool to measure the thickness of the sediment at the bottom of the casing 1. If the sediment thickness exceeds the design requirements, the secondary slag cleaning component 4 is used to clean the sediment at the bottom of the casing 1 again. The secondary slag cleaning component 4 makes the sediment at the bottom of the casing 1 float up again. At this time, the operator uses a measuring rope to measure the thickness of the sediment at the bottom of the sleeve 94. When the sediment thickness meets the standard, concrete slurry is immediately poured into the hole.

[0053] Reference Figure 2 and Figure 3 The primary slag cleaning assembly 3 includes a slag cleaning bucket 31, the outer diameter of which is smaller than the inner diameter of the sleeve 1. The slag cleaning bucket 31 is provided with two metal air ducts 32, the inner diameters of which are different. The axial direction of the air ducts 32 is arranged along the axial direction of the slag cleaning bucket 31. The lower end of the air duct 32 is fixedly connected to the inner bottom wall of the slag cleaning bucket 31. The inner bottom wall of the slag cleaning bucket 31 is also provided with a through hole communicating with the air duct 32. The top of the air duct 32 is provided with a thread. An air compressor 5 is placed on the ground. The end of the air pipe of the air compressor 5 is provided with a thread corresponding to the air duct 32. The air pipe of the air compressor 5 is threadedly connected to one of the air ducts 32.

[0054] A crossbeam 33 is provided inside the slag cleaning bucket 31. The length of the crossbeam 33 is arranged radially along the slag cleaning bucket 31. Both ends of the crossbeam 33 are fixedly connected to the inner side wall of the slag cleaning bucket 31. The crossbeam 33 is located at the upper part of the slag cleaning bucket 31 and between the two air ducts 32. A lifting ring 34 is fixedly connected to the upper surface of the crossbeam 33. The lifting ring 34 is located at the middle of the crossbeam 33. A tilting ring 35 is also fixedly connected to the outer side wall of the slag cleaning bucket 31. The tilting ring 35 is located at the bottom of the slag cleaning bucket 31.

[0055] When drilling is completed, the operator first screws the end of the air compressor 5 air pipe to the upper end of one of the air ducts 32, so that the air compressor 5 air pipe is connected to the air duct 32, and starts the air compressor 5. The air compressor 5 delivers air through the air pipe to the air duct 32. The air is sprayed through the lower end of the air duct 32 to the bottom of the slag cleaning bucket 31. Then the operator ties the rope to the lifting ring 34 and uses the crane to lower the slag cleaning bucket 31 into the casing 1 until the bottom wall of the slag cleaning bucket 31 contacts the bottom wall of the grouting pile hole. Then the operator controls the crane to move the slag cleaning bucket 31 up a certain distance so that there is a gap between the bottom wall of the slag cleaning bucket 31 and the bottom wall of the grouting pile hole.

[0056] The position of the slag removal bucket 31 is fixed, and air is sprayed to the lower side of the slag removal bucket 31 through the air pipe 32. After the high-pressure gas is sprayed out, the high-pressure gas is mixed with the mud in the sleeve 1, and the high-pressure gas is dispersed to form a plurality of bubbles. The bubbles drive the mud to move upward under the action of buoyancy. Since the mass of the mixture of the bubbles and the mud is less than the mass of the mud, the mixture of the bubbles and the mud drives the sediment to float in the space surrounded by the outer wall of the slag removal bucket 31 and the sleeve 94. The mud not mixed with the bubbles sinks downward, so that the pressure near the bottom of the slag removal bucket 31 is less than the pressure in other parts of the sleeve 1. The settled mud flows to the bottom of the slag removal bucket 31 under the action of the pressure difference, and then is mixed with the sprayed air, thereby continuously forming the mixture of the bubbles and the mud.

[0057] With the continuous increase of the height of the bubbles, the pressure outside the bubbles gradually decreases, and the volume of the bubbles gradually increases. When the mixture of the bubbles and the mud rises to a certain height, the pressure inside the bubbles is greater than the pressure outside the bubbles, and the bubbles burst. At this time, the sediment carried by the floating mud sinks into the slag removal bucket 31 under the action of its own gravity, and part of the sediment falls to the bottom of the pile hole under the action of gravity. When the slag removal bucket 31 is used for a period of time, the air compressor 5 is turned off, and a period of time is waited for the sediment above the slag removal bucket 31 to settle in the slag removal bucket 31. Then the crane is controlled to take out the slag removal bucket 31. A rope is tied on the pouring ring 35, and the rope is fixed on the crane. Finally, the crane is controlled to tilt the slag removal bucket 31, so that the sediment in the slag removal bucket 31 is poured into the mud pool.

[0058] After the sediment in the slag removal bucket 31 is poured, the slag removal bucket 31 is washed with clean water, and then the rope tied on the pouring ring 35 is untied. Finally, the slag removal bucket 31 is put into the sleeve 1. The operator repeats the above operation until no sediment is poured out of the slag removal bucket 31. After the hole cleaning of the pile hole is completed, the crane is controlled to put the reinforcement cage 6 into the pile hole. After the reinforcement cage 6 is put into the pile hole, the guide pipe for pouring concrete is put into the reinforcement cage 6, and the lower end surface of the guide pipe has a gap with the hole bottom wall of the pile hole. Then, the guide pipe stand for fixing the guide pipe is installed on the ground.

[0059] After the installation of the guide pipe stand is completed, the thickness of the sediment at the bottom of the pile hole is measured by using a measuring tool. If the thickness of the sediment meets the design requirements, the cleaning of the pile hole is completed, and at this time the operator can pour the concrete mortar into the pile hole through the guide pipe. If the thickness of the sediment does not meet the design requirements, the secondary slag removal assembly 4 needs to be used to clean the sediment at the bottom of the pile hole.

[0060] Reference Figure 4When the position of the deslagging pipe 41 is fixed, the air compressor 5 is started, and the air compressor 5 delivers air into the air pipe and the deslagging pipe 41, and the air is sprayed to the bottom of the bored pile hole along the deslagging pipe 41, so that the mixture of bubbles and mud is formed at the bottom of the bored pile, and the mixture of bubbles and mud carries the sediment to float up, thereby reducing the thickness of the sediment at the bottom of the bored pile hole; after the deslagging pipe 41 works for a period of time, the air compressor 5 is turned off, and the operator measures the thickness of the sediment at the bottom of the bored pile hole by using the measuring rope.

[0061] When the position of the deslagging pipe 41 is fixed, the air compressor 5 is started, and the air compressor 5 delivers air into the air pipe and the deslagging pipe 41, and the air is sprayed to the bottom of the bored pile hole along the deslagging pipe 41, so that the mixture of bubbles and mud is formed at the bottom of the bored pile, and the mixture of bubbles and mud carries the sediment to float up, thereby reducing the thickness of the sediment at the bottom of the bored pile hole; after the deslagging pipe 41 works for a period of time, the air compressor 5 is turned off, and the operator measures the thickness of the sediment at the bottom of the bored pile hole by using the measuring rope.

[0062] When the thickness of the sediment at the bottom of the bored pile hole does not meet the requirement, the air compressor 5 is started to continue to clean the sediment in the bored pile hole, and in this process, the deslagging pipe 41 is moved up and down by controlling the crane, so that the sediment in the bored pile hole can be better floated up; when the thickness of the sediment at the bottom of the bored pile hole meets the requirement, the deslagging pipe 41 is lifted out of the casing 1, and then the concrete mortar is poured into the bored pile hole through the conduit, and since the mass of the concrete mortar is greater than that of the mixture of bubbles, mud and sediment, the concrete mortar will gradually push the mud and sediment to move upwards until the concrete mortar fills the bored pile hole, and the mixture of mud and sediment flows into the mud pool. The structure of the primary deslagging assembly 3 and the secondary deslagging assembly 4 is simple, the circulation pipe needs to be laid during the cleaning of the bored pile hole is reduced, and the operator can easily perform the hole cleaning operation.

[0063] The implementation principle of the embodiment 1 of the application is as follows: after the drilling is completed, the operator first binds the rope on the lifting ring 34, connects the branch pipe of the air compressor 5 with one of the air pipes 32, starts the air compressor 5, controls the crane to lower the deslagging bucket 31 into the casing 1, and adjusts the position of the deslagging bucket 31; after the air compressor 5 works for a period of time, the air compressor 5 is turned off, the deslagging bucket 31 is left for a period of time, then the deslagging bucket 31 is taken out by controlling the crane, the sediment in the deslagging bucket 31 is poured out, and the deslagging bucket 31 is cleaned; after the deslagging bucket 31 is cleaned, the deslagging bucket 31 is lowered into the casing 1 again, and the above operation is repeatedly performed for multiple times until there is no sediment in the deslagging bucket 31, at which time the air compressor 5 is turned off, and the deslagging bucket 31 is pulled out of the casing 1.

[0064] After the hole cleaning is completed, a crane is used to lower the steel cage 6 and install the guide pipe and guide pipe frame. Then, a measuring rope is used to measure the thickness of the sediment at the bottom of the cast-in-place pile hole. If the thickness of the sediment at the bottom of the cast-in-place pile hole does not meet the design requirements, the end of the air pipe of the air compressor 5 is connected to the connector 42 and the rope is tied to the fixing ring 43. Then, the cleaning pipe 41 is lowered to the bottom of the cast-in-place pile hole and the air compressor 5 is started.

[0065] After the air compressor 5 has been working for a period of time, turn off the air compressor 5 and use a measuring rope to measure the thickness of the sediment at the bottom of the grouting pile hole. If the sediment thickness does not meet the design requirements, start the air compressor 5 and continue to clean the sediment at the bottom of the grouting pile hole. If the sediment thickness meets the design requirements, operate the crane to pull the slag cleaning pipe 41 outside the casing 1 and inject concrete mortar into the grouting pile hole through the guide pipe.

[0066] Example 2

[0067] Reference Figure 5 and Figure 6 The difference between this embodiment and embodiment 1 is that two lifting rings 34 are fixed on the crossbeam 33, and a pre-stirring component 7 is provided in the slag cleaning bucket 31. The pre-stirring component 7 includes a rotating shaft 71 rotatably connected in the slag cleaning bucket 31. The rotating shaft 71 is coaxial with the slag cleaning bucket 31, and the rotation axis of the rotating shaft 71 is its own axis. The upper end of the rotating shaft 71 is lower than the upper surface of the slag cleaning bucket 31, and the lower end of the rotating shaft 71 penetrates the bottom wall of the slag cleaning bucket 31 and is located outside the slag cleaning bucket 31. A fan impeller 72 is fixedly connected to the lower end of the rotating shaft 71, and the fan impeller 72 is coaxial with the rotating shaft 71.

[0068] Reference Figure 6 and Figure 7 The slag cleaning bucket 31 is also equipped with a driving component 73 for driving the rotating shaft 71 to rotate. The driving component 73 includes a main winding rope wheel 731 fixedly connected to the upper end face of the rotating shaft 71. The main winding rope wheel 731 is arranged coaxially with the rotating shaft 71, and the upper end face of the main winding rope wheel 731 is lower than the upper surface of the slag cleaning bucket 31. Two pull ropes 732 are wound on the main winding rope wheel 731. Two support rods 733 are fixedly connected to the outer wall of the slag cleaning bucket 31. The axis of the support rods 733 is perpendicular to the axis of the slag cleaning bucket 31. The two support rods 733 are evenly distributed along the circumference of the slag cleaning bucket 31.

[0069] A insertion groove 7331 is provided on the end face of the support rod 733 away from the slag cleaning bucket 31. The length direction of the insertion groove 7331 is arranged along the axial direction of the support rod 733. A clamping spring 734 is fixedly connected to the bottom wall of the insertion groove 7331. A clamping rod 735 is fixedly connected to the end of the clamping spring 734 away from the slag cleaning bucket 31. The clamping rod 735 is slidably inserted into the insertion groove 7331, and the side wall of the clamping rod 735 contacts the groove wall of the insertion groove 7331.

[0070] The end of the abutting rod 735 away from the slag removal bucket 31 is provided with a secondary winding wheel 736, the axis of the secondary winding wheel 736 is perpendicular to the axis of the slag removal bucket 31 and the axis of the abutting rod 735; one of the pull ropes 732 penetrates the side wall of the slag removal bucket 31 and is arranged in one of the abutting springs 734, the pull rope 732 is also arranged in the corresponding supporting rod 733, the end of the pull rope 732 away from the primary winding wheel 731 is wound on the corresponding secondary winding wheel 736, the other pull rope 732 also penetrates the side wall of the slag removal bucket 31 and is arranged in the other abutting spring 734, the pull rope 732 is also arranged in the corresponding supporting rod 733, and the end of the pull rope 732 away from the primary winding wheel 731 is also wound on the corresponding secondary winding wheel 736.

[0071] When it is needed to clean the pile hole once, the rope is tied on the lifting ring 34, the crane is controlled to suspend the slag removal bucket 31 above the casing 1, then the abutting rod 735 is pressed to move into the supporting rod 733, the movement of the abutting rod 735 drives the secondary winding wheel 736 to move towards the slag removal bucket 31, and the abutting rod 735 is compressed at the same time; when the distance between the two ends of the two secondary winding wheels 736 away from each other is less than the inner diameter of the casing 1, the operator keeps the distance between the two secondary winding wheels 736 unchanged, and then controls the crane to lower the slag removal bucket 31 into the casing 1.

[0072] When the two secondary winding wheels 736 are located in the casing 1, the two secondary winding wheels 736 are loosened, at this time the driving spring restores the deformation and pushes the plug-in rod and the secondary winding wheel 736 to move away from the slag removal bucket 31, until the secondary winding wheel 736 abuts against the inner side wall of the casing 1, at this time the abutting spring 734 is still in the compressed state; the abutting spring 734 keeps the secondary winding wheel 736 in contact with the inner wall of the casing 1, and the force generated when the abutting spring 734 restores the deformation is less than the friction force generated when the secondary winding wheel 736 contacts with the inner wall of the casing 1.

[0073] After the slag removal bucket 31 is put into the casing 1, the crane is controlled to lower the slag removal bucket 31, in the process of lowering the slag removal bucket 31, the slag removal bucket 31 moves downward to drive the supporting rod 733 and the abutting rod 735 to move downward, at the same time the abutting rod 735 moves, the secondary winding wheel 736 rotates, the secondary winding wheel 736 rotates to pull the pull rope 732, the pull rope 732 is wound on the secondary winding wheel 736, at the same time the pull rope 732 is wound on the secondary winding wheel 736, the primary winding wheel 731 is also rotated; the primary winding wheel 731 rotates to drive the rotating shaft 71 and the fan wheel 72 to rotate, the fan wheel 72 stirs the mud below the slag removal bucket 31, so that the sediment settled at the bottom of the casing 1 is mixed with the mud first, after the high-pressure gas is introduced into the casing 1, the sediment can better float to the upper side of the slag removal bucket 31.

[0074] In the process of moving down the slag bucket 31, the auxiliary winding wheel 736, the plug-in rod and the support rod 733 can also guide the slag bucket 31, reducing the inclination of the slag bucket 31 under the action of water flow when it is lowered, thereby reducing the possibility of casing 1 plugging caused by the inclination of the slag bucket 31, and reducing the probability that the sediment at the bottom of the casing 1 cannot flow up along the gap between the slag bucket 31 and the casing 1.

[0075] The sediment settles in the slag bucket 31, and the sand in the mud in the slag bucket 31 also settles at the bottom of the slag bucket 31. The sand settled in the slag bucket 31 occupies the space in the slag bucket 31. In order to make the slag bucket 31 can hold more sediment, reduce the frequency of the operator cleaning the slag bucket 31 in the process of cleaning the hole once, the slag bucket 31 is also provided with a centrifugal bucket 8, the centrifugal bucket 8 is coaxial with the slag bucket 31, the upper surface of the centrifugal bucket 8 is lower than the lower surface of the main winding wheel 731, a plurality of through holes are formed in the side wall of the centrifugal bucket 8, the rotating shaft 71 penetrates the bottom wall of the centrifugal bucket 8, and the bottom wall of the centrifugal bucket 8 is fixedly connected with the side wall of the rotating shaft 71; the slag bucket 31 is also provided with a rotating assembly 9 for driving the centrifugal bucket 8 to rotate.

[0076] Referring to Figure 6 With Figure 8 , the upper end faces of the main winding wheel 731 and the rotating shaft 71 are both provided with a matching groove 7311, the depth direction of the matching groove 7311 is along the axial direction of the rotating shaft 71, the matching groove 7311 on the main winding wheel 731 penetrates the main winding wheel 731, and the matching groove 7311 on the main winding wheel 731 is in communication with the matching groove 7311 on the rotating shaft 71, the rotating assembly 9 includes a reset rod 91, the reset rod 91 is inserted into the two matching grooves 7311, a thread is formed in the outer side wall of the reset rod 91, a thread corresponding to the reset rod 91 is also formed in the groove wall of the matching groove 7311 of the rotating shaft 71, and the reset rod 91 is threadedly connected with the rotating shaft 71; the upper end of the reset rod 91 penetrates the cross beam 33, the reset rod 91 is slidingly inserted into the cross beam 33, and the upper end face of the reset rod 91 is located above the cross beam 33.

[0077] The cross beam 33 is also slidingly inserted into two guide rods 92, the axial direction of the guide rod 92 is along the axial direction of the reset rod 91, the upper end face of the guide rod 92 is located above the cross beam 33, and the reset rod 91 is located between the two guide rods 92; a mounting plate 93 is fixedly connected to the upper end face of the reset rod 91, a sleeve 94 corresponding to the guide rod 92 is fixedly connected to the lower surface of the mounting plate 93, and the opening of the sleeve 94 is downward; each guide rod 92 is slidingly inserted into the corresponding sleeve 94; a reset spring 95 is fixedly connected to the inner bottom wall of the sleeve 94, and the lower end of the reset spring 95 is fixedly connected to the upper end face of the guide rod 92.

[0078] During the process of lowering the slag removal bucket 31, the main winding rope wheel 731 rotates to drive the rotating shaft 71 to rotate. Since the rotating shaft 71 is threadedly connected with the reset rod 91, the rotating shaft 71 rotates to drive the reset rod 91 to move. The guiding rod 92 cooperates with the cross beam 33 to guide the movement of the reset rod 91, so that the reset rod 91 drives the mounting plate 93 to move downward. The movement of the mounting plate 93 drives the sleeve 94 to move. The sleeve 94 moves while compressing the reset spring 95. After the slag removal bucket 31 works for a period of time, the operator controls the crane to pull the slag removal bucket 31 to move upward. The slag removal bucket 31 moves upward by a small amplitude. The upward movement distance of the slag removal bucket 31 is not enough to move the sediment in the slag removal bucket 31 out of the slag removal bucket 31. While the slag removal bucket 31 moves upward, the auxiliary winding rope wheel 736 rotates. At this time, the rotating direction of the auxiliary winding rope wheel 736 is opposite to the rotating direction of the auxiliary winding rope wheel 736 when the slag removal bucket 31 moves downward. The auxiliary winding rope wheel 736 rotates to release the pull rope 732.

[0079] During the process of releasing the pull rope 732, the reset spring 95 restores the deformation and drives the sleeve 94, the mounting plate 93 and the reset rod 91 to move upward. The movement of the reset rod 91 drives the rotating shaft 71, the main winding rope wheel 731 and the centrifugal bucket 8 to rotate. The main winding rope wheel 731 rotates and winds the pull rope 732 on the main winding rope wheel 731. The centrifugal bucket 8 rotates to mix the sediment, sand and mud in the slag removal bucket 31. The mixture of the sand and the mud has a smaller density than the sediment, so the sediment on the slag removal bucket 31 can more settle in the slag removal bucket 31, reducing the number of times of cleaning the slag removal bucket 31 by the operator.

[0080] The implementation principle of the embodiment 2 of the application is as follows: when the slag removal bucket 31 is lowered, the auxiliary winding rope wheel 736 rotates to drive the main winding rope wheel 731, the rotating shaft 71 and the fan wheel 72 to rotate. The rotating shaft 71 rotates to drive the reset rod 91 and the guiding rod 92 to move downward, while compressing the abutting spring 734. The fan wheel 72 rotates to stir the mud and the sediment in the sleeve 1. After the slag removal bucket 31 is used for a period of time, the crane is controlled to pull the slag removal bucket 31 to move upward. The upward movement of the slag removal bucket 31 drives the auxiliary winding rope wheel 736 to rotate. At the same time, the abutting spring 734 restores the deformation and drives the reset rod 91 to move upward. The movement of the reset rod 91 drives the main winding rope wheel 731, the rotating shaft 71 and the centrifugal bucket 8 to rotate. The centrifugal bucket 8 rotates to stir the mud, the sand and the sediment in the slag removal bucket 31. Then, the slag removal bucket 31 is lowered. In the process of forming a hole, the operator repeatedly performs the above operation multiple times.

[0081] The application further discloses a cast-in-place pile hole forming method using the above device.

[0082] S1, make preparations before construction, the site of the construction range is leveled by a machine, the site near the cast-in-place pile hole needs to be hardened by using reinforced concrete, and a drainage ditch and a water collecting well are arranged around the cast-in-place pile hole.

[0083] S2, determine the center coordinates of the cast-in-place pile, then measure and lay out the site, after measuring and laying out the center of the cast-in-place pile, excavate a foundation pit around the measured and laid-out center of the cast-in-place pile, and bury the roadbed plate in the foundation pit, so that the center of the roadbed plate coincides with the center of the cast-in-place pile, and the casing 1 will not deviate during pile foundation construction.

[0084] S3, install the drilling machine, after the drilling machine is in place, hoist and place the casing 1, after installing the first section of casing 1, use the theodolite or plummet to determine the perpendicularity of the first section of casing 1, and adjust the position of the first section of casing 1 according to the measured data to keep the first section of casing 1 vertical;

[0085] S4, during the operation of the drilling machine, the casing 1 is sequentially increased, and the torque, pressure and vertical accuracy are observed while the drilling machine is rotating and drilling into the ground, and relevant records are made, when drilling into the ground for three meters, the soil is taken out with a grab bucket, a casing cap for protecting the joint of the casing 1 is hoisted on the casing 1 before taking out the soil, the soil taking operation is carried out while the drilling machine is rotating and drilling, and the soil taking depth is monitored, over-excavation is not allowed, the soil thickness reserved at the bottom of the lowermost casing 1 is twice the diameter of the cast-in-place pile, when there is one meter of casing 1 on the drilling machine platform without drilling, the casing 1 joint is processed, the casing 1 is prepared, the pipe opening is treated against rust, greased, and covered with a layer of preservative film to facilitate disassembly and assembly, then a section of casing 1 is hoisted for connection, after the casing 1 is connected, drilling continues;

[0086] S5, after the casing 1 is lowered below the rock surface, start using the percussion cross hammer and percussion grab bucket to perform combined processes such as percussion, pounding, drilling and grabbing to take out rock slag, after drilling to the design elevation of the hole bottom, promptly use the percussion grab bucket to dig the bottom, so as to be flat, without loose slag, sludge and soft layers such as sediment, until the cast-in-place pile hole bottom is cleaned up, then notify the supervision, owner and other relevant departments for timely acceptance;

[0087] S6, after the final hole acceptance, use the slag bucket to take out the slag in the cast-in-place pile hole, after the slag taking is completed, there is still sediment at the bottom of the cast-in-place pile hole, at this time, use the first sediment removal assembly to remove the sediment in the cast-in-place pile hole, connect the air pipe 32 with the air pipe of the air compressor 5, then bind the rope to the lifting ring 34, start the air compressor 5, and control the crane to lower the sediment removal bucket 31 to the bottom of the cast-in-place pile hole, after the sediment removal bucket 31 works for a period of time, take out the sediment removal bucket 31, and pour the sediment and mud in the sediment removal bucket 31 into the mud pool, after washing the sediment removal bucket 31 with water, lower the sediment removal bucket 31 to the bottom of the cast-in-place pile hole again, repeatedly perform the above operations until there is no sediment poured out of the sediment removal bucket 31;

[0088] S7, according to the design requirements, complete the steel reinforcement cage 6 and perform on-site acceptance, after passing the acceptance, control the crane to hoist and place the steel reinforcement cage 6 into the cast-in-place pile hole, and weld the steel reinforcement cage 6 on the full-rotation drilling machine if the steel reinforcement cage 6 needs to be connected, the welding length needs to meet the design requirements;

[0089] S8, place the perfusion catheter, the lower end of the catheter and the bottom wall of the perfusion pile hole exist gap, the catheter installation complete in the sleeve 1 pipe orifice set up for the catheter of stable catheter frame;

[0090] S9, after the installation of the catheter, the concrete tank truck arrives at the scene, measures the thickness of the sediment at the bottom of the perfusion pile hole, if the sediment thickness meets the requirements, then can be perfusion, if the sediment thickness does not meet the requirements, then need to clean the hole twice;

[0091] S10, when the hole is cleaned twice, the rope is tied on the fixed ring 43, the connecting head 42 is connected with the air pipe of the air compressor 5, then the crane is controlled to lower the sediment removal pipe 41 to the bottom of the perfusion pile hole, and make the connecting head 42 and the bottom wall of the perfusion pile hole exist gap, open the air compressor 5, the sediment removal pipe 41 works for a period of time, then close the air compressor 5, measure the thickness of the sediment at the bottom of the perfusion pile hole, if the sediment thickness does not meet the design requirements, then use the secondary sediment removal assembly 4 to clean the sediment again, until the thickness of the sediment meets the design requirements, then hoist out the sediment removal pipe 41, at this time, the perfusion pile hole can be perfused with concrete.

[0092] The above are the preferred embodiments of the present application, not limited by the protection scope of the present application, therefore: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A hole cleaning device for cast-in-place piles, characterized in that: The equipment includes a primary slag cleaning assembly (3), a secondary slag cleaning assembly (4), and a crane for lowering the primary slag cleaning assembly (3) and the secondary slag cleaning assembly (4) into the grouting pile hole. The hole cleaning equipment also includes an air compressor (5) that provides air to the primary slag cleaning assembly (3) and the secondary slag cleaning assembly (4). The primary slag cleaning assembly (3) includes a slag cleaning bucket (31), the outer diameter of which is smaller than the diameter of the grouting pile hole. The inner bottom wall of the slag cleaning bucket (31) is... Several air ducts (32) are fixedly connected to the upper part. The upper end of the air duct (32) is threadedly connected to the air pipe of the air compressor (5). The lower end of the air duct (32) passes through the bottom wall of the slag cleaning bucket (31). A crossbeam (33) is fixedly connected to the upper end of the slag cleaning bucket (31). A lifting ring (34) is fixedly connected to the crossbeam (33). The lifting ring (34) is located on the axis of the slag cleaning bucket (31). A tilting ring (35) is fixedly connected to the bottom of the outer wall of the slag cleaning bucket (31). The secondary slag removal assembly (4) includes a slag removal pipe (41), the outer diameter of which is smaller than the diameter of the grouting pile hole. A fixing ring (43) is fixedly connected to the top of the slag removal pipe (41), and the upper end of the slag removal pipe (41) is connected to the air pipe of the air compressor (5). The slag cleaning bucket (31) is also provided with a pre-stirring component (7), which includes a fan impeller (72) rotatably connected to the slag cleaning bucket (31). The fan impeller (72) is axially arranged along the axial direction of the slag cleaning bucket (31). The fan impeller (72) is located below the slag cleaning bucket (31). The slag cleaning bucket (31) is provided with a driving component (73) for driving the fan impeller (72) to rotate. The driving component (73) includes a rotating shaft (71) rotatably connected in the slag cleaning bucket (31). The axial direction of the rotating shaft (71) is along the axial direction of the slag cleaning bucket (31). The rotating shaft (71) passes through the bottom wall of the slag cleaning bucket (31). A fan impeller (72) is fixedly connected to the lower end of the rotating shaft (71). A main winding rope wheel (731) is fixedly connected to the upper end face of the rotating shaft (71). The axial direction of the main winding rope wheel (731) is along the axial direction of the rotating shaft (71). Multiple auxiliary winding rope wheels (736) are rotatably connected to the outer side wall of the slag cleaning bucket (31). The axis of the wheel (736) is perpendicular to the axis of the slag cleaning bucket (31). The auxiliary rope wheel (736) rolls with the inner wall of the casing (1) in the grouting pile hole. Two pull ropes (732) are wound on the main rope wheel (731). One end of the pull rope (732) away from the main rope wheel (731) passes through the side wall of the slag cleaning bucket (31) and is wound on one of the auxiliary rope wheels (736). The other end of the pull rope (732) away from the main rope wheel (731) also passes through the side wall of the slag cleaning bucket (31) and is wound on the other auxiliary rope wheel (736).

2. The hole cleaning device for cast-in-place piles according to claim 1, characterized in that: The slag cleaning bucket (31) is rotatably connected to a centrifuge bucket (8). The upper end of the centrifuge bucket (8) is lower than the pull rope (732). Multiple through holes are provided on the side wall of the centrifuge bucket (8). The rotating shaft (71) passes through the bottom wall of the centrifuge bucket (8) and is fixedly connected to the centrifuge bucket (8). The slag cleaning bucket (31) is also provided with a rotating assembly (9) that drives the centrifuge bucket (8) to rotate.

3. The hole cleaning device for cast-in-place piles according to claim 2, characterized in that: The rotating assembly (9) includes a reset rod (91). The side wall of the reset rod (91) is threaded. The rotating shaft (71) has a corresponding mating groove (7311) on its side wall. The mating groove (7311) is threaded on its side wall. The reset rod (91) is threaded into the mating groove (7311). The reset rod (91) and the rotating shaft (71) are coaxial. The reset rod (91) is simultaneously slidably inserted into the main winding sheave (731) and the crossbeam (33). A mounting plate (93) is fixedly connected to the top surface of the reset rod (91). The mounting plate (93) is located at... Above the crossbeam (33), two guide rods (92) are slidably inserted on the crossbeam (33). The axial direction of the guide rods (92) is set along the axial direction of the reset rod (91). A sleeve (94) corresponding to the guide rods (92) is fixedly connected on the lower surface of the mounting plate (93). Each guide rod (92) is slidably inserted into the corresponding sleeve (94). A reset spring (95) is fixedly connected to the upper end face of the guide rod (92). The upper end of the reset spring (95) is fixedly connected to the inner bottom wall of the sleeve (94). The lower end face of the guide rod (92) abuts against the upper end face of the main winding sheave (731).

4. The hole cleaning device for cast-in-place piles according to claim 1, characterized in that: A support rod (733) corresponding to the auxiliary rope reel (736) is vertically fixedly connected to the outer wall of the slag cleaning bucket (31). A clamping rod (735) is slidably inserted into the end of the support rod (733) away from the slag cleaning bucket (31). The sliding direction of the clamping rod (735) is perpendicular to the axial direction of the slag cleaning bucket (31). A clamping spring (734) is fixedly connected to the end of the clamping rod (735) inserted into the support rod (733). The clamping spring (734) is located away from the slag cleaning bucket (31). One end of the clamping rod (735) is fixedly connected to the support rod (733), and the auxiliary rope wheel (736) is rotatably connected to the end of the clamping rod (735) away from the slag cleaning bucket (31). The clamping spring (734) is in a compressed state. The auxiliary rope wheel (736) abuts against the inner wall of the sleeve (94) in the grouting pile hole. The friction generated when the auxiliary rope wheel (736) rolls on the sleeve (94) is greater than the elastic force generated when the clamping spring (734) recovers its deformation.

5. A hole cleaning device for cast-in-place piles according to claim 4, characterized in that: The support rod (733) has an insertion groove (7331) on its end face away from the slag cleaning bucket (31). The length direction of the insertion groove (7331) is perpendicular to the axial direction of the slag cleaning bucket (31). The clamping rod (735) is slidably inserted into the insertion groove (7331). The end of the clamping spring (734) away from the clamping rod (735) is fixedly connected to the bottom wall of the insertion groove (7331).

6. A method for forming a bored pile, characterized in that, The construction of bored piles using the hole cleaning equipment as described in any one of claims 1-5 includes the following steps: S1. Make preparations before construction, level the site within the construction area, harden the site near the cast-in-place piles, and dig drainage ditches and collection wells near the cast-in-place piles; S2. Conduct on-site measurement and layout, mark the center of the cast-in-place pile, then dig a foundation pit around the cast-in-place pile and bury the roadbed plate in the foundation pit; S3. Install the drilling rig. After the drilling rig is in place, install the casing and keep the first section of casing vertical. S4. The drilling rig works to gradually drill the casing into the ground. During the drilling process, the casing is gradually added. During the drilling process, various parameters of the drilling rig are observed. When the casing has drilled three meters into the ground, soil is removed using a grab bucket. S5. After the casing is lowered below the rock surface, use a cross hammer and a grab bucket to remove the rock debris. After drilling to the design elevation of the bottom of the hole, use a grab bucket to clean the bottom of the grouting pile hole, and then notify the relevant personnel for acceptance. S6. After the final hole acceptance, use a slag hopper to remove slag from the pile hole. After the slag removal is completed, there is still sediment at the bottom of the pile hole. At this time, use a primary slag cleaning unit to clean the pile hole. S7. After the first cleaning is completed, operate the crane to lift the steel cage into the pile hole; S8. Place the grouting guide pipe. There is a gap between the lower end face of the guide pipe and the bottom wall of the grouting pile hole. After the guide pipe is installed, a guide pipe support is set up at the casing pipe opening to stabilize the guide pipe. S9. After the duct is installed, the concrete mixer truck arrives at the site and measures the thickness of the sediment at the bottom of the pile hole. If the sediment thickness meets the requirements, the pile is poured. If the sediment thickness does not meet the requirements, the hole needs to be cleaned a second time. S10. Use the secondary slag cleaning component to clean the slag in the pile hole. After the secondary slag cleaning component has been working for a period of time, measure the thickness of the slag at the bottom of the pile hole. Once the slag thickness meets the design requirements, lift out the slag cleaning pipe and then pour concrete into the pile hole.

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