Hole cleaning construction device for impact cast-in-situ bored pile

Abstract

The utility model provides a hole cleaning construction device for an impact cast-in-situ bored pile, which belongs to the field of building construction and is used for solving the problem that sediment at the bottom of a hole blocks an input port of a slurry pump in the prior art. The device comprises a sealing disc, a switching mechanism, an air compressor, an air inlet pipe and a deslagging pipe, the cast-in-place pile is divided into the slurry part and the sediment part through the sealing disc, then high-pressure air is injected into the sediment part through the air compressor, the pressure of the sediment part is increased, and sediment in the sediment part is discharged out of the sediment removal pipe into the sedimentation tank; a second through hole is formed in the sealing disc, and a switching mechanism for sealing the second through hole is arranged, so that the sealing disc can be conveniently put into the cast-in-place pile or taken out of the cast-in-place pile; and the slag removal pipe is of a pipeline structure, and the input end and the output pipe of the slag removal pipe cannot be blocked due to pebbles or gravels, so that the sediments can be smoothly cleaned. A slurry pump is not adopted in the whole process, and the situation that sediment blocks an input port of the slurry pump is avoided.

Description

A drilling and cleaning device for impact-drilled cast-in-place piles Technical Field

[0001] This utility model belongs to the field of building construction, and in particular relates to a hole cleaning construction device for impact drilling cast-in-place piles. Background Technology

[0002] In construction engineering, percussion bored piles are widely used in complex geological conditions such as soft soil, sand, and gravel strata due to their strong adaptability and high bearing capacity. During construction, the quality of the bored pile hole directly affects the bearing capacity and structural stability of the pile foundation. However, after percussion drilling, a large amount of sediment (such as drill cuttings and mud sediment) remains at the bottom of the hole. If not thoroughly cleaned, it will lead to a decrease in the bearing capacity of the pile tip and an increase in pile settlement, seriously affecting the quality of the pile.

[0003] In existing technologies, mud pumps are typically used to remove sediment deposited at the bottom of bored piles. However, during the suction process, the accumulation of pebbles and gravel within the sediment can easily clog the pump's inlet, leading to pump damage and the inability to effectively remove the sediment deposited at the bottom of the hole. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a drilling and grouting pile cleaning device to solve the problem of sediment clogging the mud pump inlet at the bottom of the hole in the prior art.

[0005] To achieve the above and other related objectives, this utility model provides a drilling and cleaning device for impact-drilled cast-in-place piles, comprising: a sealing disc, a switching mechanism, an air compressor, an air inlet pipe, and a slag removal pipe; the sealing disc is used to divide the grouting hole into a mud portion and a sediment portion, and the sealing disc is provided with a first through hole for the air inlet pipe and the slag removal pipe to pass through, and at least one second through hole for the mud to pass through; one end of the air inlet pipe is connected to the air compressor, and the other end passes through the first through hole and is located in the sediment portion, the air inlet pipe is sleeved on the slag removal pipe, and the air inlet pipe is fixedly connected to the first through hole; one end of the slag removal pipe is located above the sedimentation tank, and the other end passes through the first through hole and is located in the sediment portion; the switching mechanism is used to open or close the second through hole.

[0006] Optionally, the switching mechanism includes a drive assembly, a rotating shaft, and a sealing member corresponding to the second through hole for closing the second through hole; one end of the rotating shaft is connected to the drive assembly, and the other end is rotatably connected to the sealing disc, and the sealing member is disposed on the rotating shaft.

[0007] Optionally, the drive assembly includes a motor, a first pulley, a second pulley, and a belt; the first pulley is connected to the motor, the second pulley is connected to the rotating shaft, and the belt is fitted onto the first pulley and the second pulley.

[0008] Optionally, the sealing disc includes an upper shell and a lower shell, which together form a receiving cavity, and a sealing element is disposed within the receiving cavity; the upper shell and the lower shell are respectively provided with a first sub-through hole for the air inlet pipe and the slag removal pipe to pass through, and at least one second sub-through hole communicating with the receiving cavity; the two first sub-through holes form a first through hole, and each pair of corresponding second sub-through holes has a gap for the sealing element to pass through; the rotating shaft is rotatably connected to the upper shell.

[0009] Optionally, the lower housing is also provided with a third through hole communicating with the receiving cavity.

[0010] Optionally, the rotating shaft is sleeved on the intake pipe and rotatably connected to the intake pipe.

[0011] Optionally, the end of the air inlet pipe that extends into the sediment section is provided with multiple air outlets.

[0012] Optionally, the centerline of the air outlet is not perpendicular to the centerline of the air inlet pipe.

[0013] Optionally, the acute angle formed by the centerline of the air outlet and the central axis of the air inlet pipe is oriented away from the mud.

[0014] Optionally, it also includes a support member disposed at the pile opening of the cast-in-place pile, the support member having a fourth through hole for the rotating shaft to pass through, the rotating shaft being rotatably connected to the fourth through hole.

[0015] As described above, the impact drilling and grouting pile cleaning device of this utility model has at least the following beneficial effects:

[0016] 1. By using a sealing disc to divide the cast-in-place pile into a mud section and a sediment section, and then using an air compressor to inject high-pressure air into the sediment section, the pressure in the sediment section is increased, thereby allowing the sediment in the sediment section to be discharged from the slag removal pipe into the sedimentation tank.

[0017] 2. A second through hole is provided on the sealing disc, and a switch mechanism for sealing the second through hole is provided to facilitate the insertion of the sealing disc into or removal from the cast-in-place pile.

[0018] 3. Because the slag removal pipe is a pipeline structure, its inlet and outlet pipes will not be blocked by pebbles or gravel, thus allowing for smooth slag removal. Furthermore, since no mud pump is used throughout the process, there is no risk of slag clogging the mud pump's inlet. Attached Figure Description

[0019] Figure 1 shows a simplified schematic diagram of the overall structure of a drilling and grouting pile cleaning device according to the present invention.

[0020] Figure 2 shows a schematic diagram of the sealing disc of a drilling and grouting pile cleaning device according to the present invention.

[0021] Figure 3 shows a cross-sectional view of the sealing disc of a drilling and grouting pile cleaning device according to the present invention.

[0022] Figure 4 shows a schematic diagram of the structure of the sealing disc of the impact drilling and grouting pile cleaning construction device of this utility model after omitting the upper shell.

[0023] Component designation explanation:

[0024] 1. Sealing disc; 11. First through hole; 12. Second through hole; 13. Upper housing; 14. Lower housing; 141. Third through hole; 15. First sub-through hole; 16. Second sub-through hole; 2. Switching mechanism; 21. Drive assembly; 211. Motor; 212. First pulley; 213. Second pulley; 214. Belt; 22. Rotating shaft; 23. Sealing element; 3. Air compressor; 4. Inlet pipe; 41. Outlet port; 5. Slag removal pipe; 6. Support element. Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0026] Please refer to all the accompanying drawings below. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0027] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0028] Please refer to Figure 1. This utility model provides a drilling and cleaning device for impact-drilled cast-in-place piles, including: a sealing disc 1, a switching mechanism 2, an air compressor 3, an air inlet pipe 4, and a slag removal pipe 5. The sealing disc 1 is used to divide the grouting hole into a mud part and a sediment part. The sealing disc 1 is provided with a first through hole 11 for the air inlet pipe 4 and the slag removal pipe 5 to pass through, and at least one second through hole 12 for the mud to pass through. One end of the air inlet pipe 4 is connected to the air compressor 3, and the other end passes through the first through hole 11 and is located in the sediment part. The air inlet pipe 4 is sleeved on the slag removal pipe 5, and the air inlet pipe 4 is fixedly connected to the first through hole 11. Specifically, the air inlet pipe 4 can be divided into a first air inlet pipe 4 and a second air inlet pipe 4. The first air inlet pipe 4 is sleeved on the slag removal pipe 5, and its two ends are welded to the outer side wall of the slag removal pipe 5 respectively. An air inlet hole can be provided on the upper side of the first air inlet pipe 4. One end of the first air inlet pipe 4 is connected to the air inlet hole, and the other end is connected to the air compressor 3. An air outlet 41 may be provided on the lower side of the first air inlet pipe 4. One end of the slag removal pipe 5 is located above the sedimentation tank, and the other end passes through the first through hole 11 and is located inside the slag section; the switching mechanism 2 is used to open or close the second through hole 12.

[0029] During construction, the switching mechanism 2 first opens the second through hole 12. Then, the construction personnel place the sealing plate 1 into the cast-in-place pile. Once it is in the designated position, such as inserting the slag removal pipe 5 into or near the slag, the sealing plate 1 separates the cast-in-place pile into a mud section and a slag section. At this point, the switching mechanism 2 closes the second through hole 12. Then, the air compressor 3 is started, and high-pressure air is injected into the slag section through the air inlet pipe 4. Due to the sealing effect of the sealing plate 1 on the cast-in-place pile, the pressure in the slag section gradually increases, and the slag will gradually be discharged into the sedimentation tank through the slag removal pipe 5. After the slag is cleaned, the switching mechanism 2 is used to open the second through hole 12 again. The mud in the mud section will flow into the slag section due to its own weight, thus expelling the air in the slag section. At this time, the construction personnel can remove the sealing plate 1, thereby completing the slag removal work.

[0030] In this embodiment, since the slag removal pipe 5 is a pipeline structure, its inlet and outlet pipes will not be blocked by pebbles or gravel, thus allowing for smooth cleaning of sediment. Furthermore, since no mud pump is used throughout the process, there is no risk of sediment clogging the mud pump's inlet.

[0031] Please refer to Figures 1-4. The switching mechanism 2 may include a drive assembly 21, a rotating shaft 22, and a sealing member 23 corresponding to the second through hole 12 for sealing the second through hole 12. One end of the rotating shaft 22 is connected to the drive assembly 21, and the other end is rotatably connected to the sealing disc 1. The sealing member 23 is disposed on the rotating shaft 22. The sealing member 23 may be a circular structure with a diameter larger than that of the second through hole 12. The number of sealing members 23 is the same as the number of second through holes 12. When the central axis of the sealing member 23 coincides with the central axis of the second through hole 12, the sealing of the second through hole 12 is completed. The drive assembly 21 may include a motor 211, a first pulley 212, a second pulley 213, and a belt 214. The motor 211 is mounted on the ground of the grouting pile. The first pulley 212 is coaxially mounted with the output shaft of the motor 211. The second pulley 213 is connected to one end of the rotating shaft 22 that extends out of the bottom surface. The belt 214 is sleeved on the first pulley 212 and the second pulley 213. In this way, the motor 211 drives the rotating shaft 22 to move through the belt 214, thereby driving the sealing member 23 to rotate and achieve the closure of the second through hole 12.

[0032] The sealing disc 1 includes an upper shell 13 and a lower shell 14, which together form a receiving cavity. A sealing member 23 is disposed within the receiving cavity. The upper shell 13 and the lower shell 14 are each provided with a first sub-through hole 15 for the air inlet pipe 4 and the slag removal pipe 5 to pass through, and at least one second sub-through hole 16 communicating with the receiving cavity. The two first sub-through holes 15 form a first through hole 11, which is not communicating with the receiving cavity. Each pair of corresponding second sub-through holes 16 has a gap for the sealing member 23 to pass through. That is, the second sub-through holes 16 on the upper shell 13 and the corresponding second sub-through holes 16 on the lower shell 14 are spaced apart in a direction perpendicular to the ground to form a gap for the sealing member 23 to pass through. The rotating shaft 22 and the upper shell 13 can be rotatably connected via a bearing or other structure. It is understandable that when the sealing member 23 closes the second through hole 12, the upper side of the sealing member 23 can abut against the lower side of the second sub-through hole 16 of the upper housing 13, or abut against the upper side of the second sub-through hole 16 of the lower housing 14, or abut against the second sub-through holes 16 of both the upper housing 13 and the lower housing 14, thereby achieving the purpose of closing the second through hole 12.

[0033] Because there is a gap between the second through hole 16 of the upper shell 13 and the lower shell 14, slurry will enter the receiving cavity. In order to allow the slurry to flow out of the sealing disc 1 when it is removed from the pile, in this embodiment, the lower shell 14 is also provided with a third through hole 141 communicating with the receiving cavity, so that the slurry entering the receiving cavity can flow out naturally when the sealing disc 1 is removed from the pile.

[0034] The rotating shaft 22 is sleeved on the air intake pipe 4 to facilitate operation by construction personnel. The rotating shaft 22 and the air intake pipe 4 are rotatably connected through bearings and other structures, so that the air intake pipe 4 will not rotate when the rotating shaft 22 rotates.

[0035] The centerline of the vent 41 is not perpendicular to the centerline of the inlet pipe. Specifically, the centerline of the vent 41 is perpendicular to the centerline of the first inlet pipe 4 to prevent the high-pressure air from the air compressor 3 from directly facing the inner wall of the cast-in-place pile. Preferably, the acute angle formed by the centerline of the vent 41 and the centerline of the inlet pipe is oriented away from the mud, so that the high-pressure air can disturb the sediment deposited at the bottom of the cast-in-place pile, facilitating its discharge through the slag removal pipe 5.

[0036] To secure the sealing disc 1, this embodiment also includes a support member 6 located at the pile opening of the cast-in-place pile. The support member 6 has a fourth through hole for the rotating shaft 22 to pass through, and the rotating shaft 22 is rotatably connected to the fourth through hole via a bearing. Specifically, the support member 6 may include a symmetrically arranged first sub-support member 6 and a second sub-support member 6, each with a fourth through hole, which together form the fourth through hole. In use, the sealing disc 1 is first placed into the cast-in-place pile and positioned at the designated location. Then, the first and second sub-support members 6 are used to secure the portion of the rotating shaft 22 extending out of the pile, and the bearing enables a rotatable connection. This achieves two-point fixation of the rotating shaft 22, ensuring the stability of the hole cleaning operation.

[0037] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0038] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A device for cleaning boreholes in impact-drilled cast-in-place piles, characterized in that, include: The system comprises a sealing disc, a switching mechanism, an air compressor, an air inlet pipe, and a slag removal pipe. The sealing disc is used to divide the injection hole into a mud section and a sediment section. The sealing disc is provided with a first through hole for the air inlet pipe and the slag removal pipe to pass through, and at least one second through hole for the mud to pass through. One end of the air inlet pipe is connected to the air compressor, and the other end passes through the first through hole and is located in the sediment section. The air inlet pipe is sleeved on the slag removal pipe, and the air inlet pipe is fixedly connected to the first through hole. One end of the slag removal pipe is located above the sedimentation tank, and the other end passes through the first through hole and is located in the sediment section. The switching mechanism is used to open or close the second through hole.

2. The impact drilling and grouting pile cleaning device according to claim 1, characterized in that: The switching mechanism includes a drive assembly, a rotating shaft, and a sealing member corresponding to the second through hole for closing the second through hole; one end of the rotating shaft is connected to the drive assembly, and the other end is rotatably connected to the sealing disc, and the sealing member is disposed on the rotating shaft.

3. The impact drilling and grouting pile cleaning device according to claim 2, characterized in that: The drive assembly includes a motor, a first pulley, a second pulley, and a belt; the first pulley is connected to the motor, the second pulley is connected to the rotating shaft, and the belt is sleeved on the first pulley and the second pulley.

4. The impact drilling and grouting pile cleaning device according to claim 2, characterized in that: The sealing disc includes an upper shell and a lower shell, which together form a receiving cavity. The sealing member is disposed within the receiving cavity. The upper shell and the lower shell are respectively provided with a first sub-through hole for the air inlet pipe and the slag removal pipe to pass through, and at least one second sub-through hole communicating with the receiving cavity. Two first sub-through holes form a first through hole, and each pair of corresponding second sub-through holes has a gap for the sealing member to pass through. The rotating shaft is rotatably connected to the upper shell.

5. The impact drilling and grouting pile cleaning device according to claim 4, characterized in that: The lower housing is also provided with a third through hole that communicates with the receiving cavity.

6. The impact drilling and grouting pile cleaning device according to claim 4, characterized in that: The rotating shaft is sleeved on the air intake pipe and is rotatably connected to the air intake pipe.

7. The impact drilling and grouting pile cleaning device according to claim 1, characterized in that: The end of the air inlet pipe that extends into the sediment section is provided with multiple air outlets.

8. The impact drilling and grouting pile cleaning device according to claim 7, characterized in that: The centerline of the air outlet is not perpendicular to the centerline of the air inlet pipe.

9. The impact drilling and grouting pile cleaning device according to claim 8, characterized in that: The acute angle formed by the centerline of the air outlet and the central axis of the air inlet pipe is oriented away from the mud.

10. A drilling and grouting pile cleaning device according to claim 5, characterized in that: It also includes a support member installed at the pile opening of the cast-in-place pile, the support member having a fourth through hole for the rotating shaft to pass through, the rotating shaft being rotatably connected to the fourth through hole.

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